Welding mark-free welding and fixing structure for water pipe connector of coffee machine

Abstract

The utility model discloses a welding mark-free welding and fixing structure for a water pipe connector of a coffee machine, which relates to the field of water pipe welding and comprises a water pipe positioning component used for winding and fixing a water pipe; the centering clamp comprises a left part and a right part which are oppositely opened and closed, each part is fixedly connected with one electrode block, the opening and closing position of the centering clamp is used for placing and positioning the water pipe connector, and the water pipe penetrates through the electrode blocks, then extends into the water pipe connector of the centering clamp and is in contact with and coaxially positioned with the water pipe connector; the claw type air cylinder is used for clamping or loosening the two parts of the centering clamp; and the taper electrode is arranged on the welding gun, is used for extending into the water pipe connector of the centering clamp and is in contact with the inclined surface of the inner cavity of the water pipe connector through the conical surface for discharging. The utility model provides a water pipe joint welding and fixing mode which is environment-friendly, energy-saving and stable in welding quality; the problem that the water pipe and the water pipe connector are inclined due to thermal stress when the water pipe connector and the water pipe are welded is solved.

Description

Technical Field

[0001] The utility model relates to the field of water pipe welding, in particular to a welding fixing structure of a water pipe joint of a coffee machine without welding marks. Background Art

[0002] In order to ensure that the direction deviation of the water pipe joint is controlled within the range of ±5° during the brazing of the water pipe joint slot, the water pipe joint needs to be positioned by argon arc welding in advance. However, during the automatic argon arc welding process, there will be problems such as oxidation of the welding point due to insufficient shielding gas. It is easy to have defects such as excessive current welding through the water pipe, inconsistent weld scar size at the welding point, and insufficient coaxiality between the water pipe joint and the water pipe due to welding thermal deformation. In addition, argon arc welding is harmful to the human body. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a coffee machine water pipe joint welding fixing structure without welding marks, to provide an environmentally friendly, energy-saving and stable welding quality water pipe joint welding fixing method; to avoid the problem of skewness between the water pipe and the water pipe joint due to thermal stress when the water pipe joint and the water pipe are welded.

[0004] The purpose of the utility model is to achieve the following technical solution: the coffee machine water pipe joint has no welding mark welding fixing structure, including:

[0005] Water pipe positioning assembly, used for winding and fixing water pipes;

[0006] The centering clamp includes two relatively open and closed left and right parts, and each part is fixedly connected to an electrode block. The opening and closing part of the centering clamp is used to place and position the water pipe joint. After the water pipe passes through the electrode block, it extends into the water pipe joint of the centering clamp and contacts and is coaxially positioned with the water pipe joint.

[0007] Claw-type cylinders for tightening or loosening the two halves of the centering clamp; and

[0008] The tapered electrode arranged on the welding gun is used to extend into the water pipe joint of the centering clamp, and discharges through the contact between the tapered surface and the inclined surface of the inner cavity of the water pipe joint.

[0009] As a further technical solution, after the centering clamp is closed, a joint positioning hole and a water pipe positioning hole that are interconnected are formed at its center, and a step is provided between the joint positioning hole and the water pipe positioning hole so that the water pipe joint inserted into the joint positioning hole is coaxially positioned with the water pipe inserted into the water pipe positioning hole.

[0010] As a further technical solution, slots are provided on both sides of the outer wall of the upper part of the water pipe joint, and a notch is provided on the top of the centering clamp, so that after the water pipe joint is placed in the joint positioning hole, the slot is exposed from the notch.

[0011] As a further technical solution, after the water pipe joint is welded to the water pipe, the direction deviation of the slot is less than or equal to ±5°.

[0012] As a further technical solution, a mounting groove is provided at the bottom of the centering clamp for placing the electrode block.

[0013] As a further technical solution, a connection hole is provided on the centering clamp for fixing and connecting the electrode block.

[0014] As a further technical solution, the water pipe positioning assembly includes a support plate with a groove on the surface and a positioning clamp ring with a flange at the end. The flange is embedded in the groove and fixed, and the water pipe is wrapped around the positioning clamp ring.

[0015] As a further technical solution, fixing holes are provided on the support plate and the positioning clamp ring to fix the support plate and the positioning clamp ring together.

[0016] As a further technical solution, the two parts of the centering clamp are arranged between two clamping claws of the claw-type cylinder.

[0017] As a further technical solution, when the claw-type cylinder clamps the centering clamp, the electrode block maintains a contact force of 5N with the outer wall of the water pipe.

[0018] The beneficial effects of the utility model are:

[0019] 1. By using heating and pressurization, and adopting electric current with corresponding parameters, the water pipe mouth and the water pipe joint contact end surface generate instantaneous high temperature, so that the two materials are fused together; because the water pipe is extended into the water pipe joint, there is no welding mark on the appearance after the water pipe and the water pipe joint are welded and fixed;

[0020] 2. When the conical electrode contacts the inner oblique end surface of the water pipe joint, discharge welding is performed. There is no high-temperature oxidation or welding penetration at the welding points of the water pipe and the water pipe joint, and there are no welding spots or welding slag on the surface. Standard welding parameters can be formulated by comparing and testing multiple groups of test currents, effectively controlling the welding current of the water pipe and the water pipe joint during the welding process;

[0021] 3. The equipment does not require any auxiliary materials such as protective gas and cooling water flow during the welding process;

[0022] 4. The centering clamp is equipped with a semicircular step structure to ensure that the water pipe and the water pipe joint remain concentric during the welding process. At the same time, the centering clamp is designed with an adjustment space to avoid the problem of cold welding due to the length of the water pipe.

[0023] 5. A notch is opened on the centering clamp to expose the slot of the water pipe joint from the notch to facilitate angle adjustment and ensure that the direction deviation of the slot is less than or equal to ±5° after welding;

[0024] 6. When welding, the water pipe is wrapped around the water pipe positioning assembly, no need to hold it, and welding is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model during welding.

[0026] Figure 2 It is a schematic diagram of the structure of the centering clamp in the utility model (only one part is shown, which is symmetrical with the structure of the other part).

[0027] Figure 3 This is a schematic diagram of the structure after the water pipe and water pipe joint are positioned by inserting the centering clamp.

[0028] Figure 4 It is a structural schematic diagram of the claw-type cylinder in the utility model.

[0029] Figure 5 It is a structural schematic diagram of the backing plate in the utility model.

[0030] Figure 6 It is a structural schematic diagram of the positioning clamp ring in the utility model.

[0031] Figure 7 It is a schematic diagram of the structure of the taper electrode contacting the water pipe joint during welding of the utility model.

[0032] Figure 8 It is a schematic diagram of the connection structure between the water pipe and the water pipe joint after welding.

[0033] Fig. 9 for Figure 8 AA section view.

[0034] Explanation of the accompanying drawings: tapered electrode 1, conical surface 11, water pipe joint 2, inclined surface 21, slot 22, centering clamp 3, water pipe positioning hole 31, joint positioning hole 32, notch 33, mounting groove 34, connecting hole 35, step 36, electrode block 4, water pipe 5, positioning clamp 6, flange 61, support plate 7, groove 71, claw-type cylinder 8, clamping claw 81, fixing hole 9. DETAILED DESCRIPTION

[0035] The utility model will be described in detail below with reference to the accompanying drawings:

[0036] Example: As shown in the attached Figures 1 to 9 As shown, the coffee machine water pipe joint has no welding marks and is welded and fixed, comprising a tapered electrode 1, a tapered surface 11, a water pipe joint 2, a bevel 21, a slot 22, a centering clamp 3, a water pipe positioning hole 31, a joint positioning hole 32, a notch 33, a mounting groove 34, a connecting hole 35, a step 36, an electrode block 4, a water pipe 5, a positioning clamp 6, a flange 61, a support plate 7, a groove 71, a claw-type cylinder 8, a clamping claw 81 and a fixing hole 9.

[0037] Reference Figure 1 , 5 , 6, the support plate 7 and the positioning clip 6 constitute a water pipe positioning component, wherein a circular groove 71 is provided on the surface of the support plate 7, and a flange 61 is provided at the bottom of the positioning clip 6. During installation, the flange 61 is embedded in the groove 71, and the support plate 7 and the positioning clip 6 are fixedly connected by using the fixing holes 9 provided on the support plate 7 and the positioning clip 6, and then the water pipe 5 can be wrapped around and fixed on the positioning clip 6.

[0038] The centering clip 3 includes two relatively open and closed left and right parts ( Figure 2 Only one part is shown, which is symmetrical with the structure of the other part), a connecting hole 35 is opened on each part of the centering clamp 3, and the electrode block 4 is placed in the installation groove 34 opened at the bottom of the centering clamp 3, and then fixedly connected to the centering clamp 3 through the connecting hole 35, so that each part of the centering clamp 3 is fixedly connected to an electrode block 4. The opening and closing part of the centering clamp 3 is used to place and position the water pipe joint 2. The water pipe 5 passes through the electrode block 4 and then extends into the water pipe joint 2 of the centering clamp 3, and contacts and coaxially positions with the water pipe joint 2. When the centering clamp 3 is closed, a joint positioning hole 32 and a water pipe positioning hole 31 that are interconnected are formed in its center, as shown in FIG. Figure 2 As shown, the diameter of the joint positioning hole 32 is larger than the diameter of the water pipe positioning hole 31. At the same time, a step 36 is provided between the joint positioning hole 32 and the water pipe positioning hole 31, so that the water pipe joint 2 inserted into the joint positioning hole 32 and the water pipe 5 inserted into the water pipe positioning hole 31 can be coaxially positioned. Figure 1 , 4 As shown, the two parts of the centering clamp 3 are arranged between two clamping claws 81 of a claw-type cylinder 8, and the claw-type cylinder 8 is used to clamp or release the two parts of the centering clamp 3.

[0039] like Figure 1 , 7 As shown, the tapered electrode 1 is arranged on the welding gun (located above the centering clamp 3). When the welding gun is pressed down, the tapered electrode 1 extends into the water pipe joint 2 of the centering clamp 3, and discharges by contacting the tapered surface 11 at the lower end of the tapered electrode 1 with the inclined surface 21 of the inner cavity of the water pipe joint 2, thereby welding and fixing the water pipe 5 and the water pipe joint 2. Since the water pipe 5 is extended into the water pipe joint 2, there is no welding mark on the appearance after the water pipe 5 and the water pipe joint 2 are welded and fixed. Preferably, as Figure 8 , 9 As shown, the outer wall of the upper part of the water pipe joint 2 is provided with a slot 22 on both sides, and the top of the centering clamp 3 is provided with a notch 33 (as shown in FIG. Figure 1 , 2 As shown), after the water pipe connector 2 is placed in the connector positioning hole 32, the slot 22 can be exposed from the notch 33, which is convenient for adjusting the angle. At the same time, it is ensured that after the water pipe connector 2 is welded to the water pipe 5, the direction deviation of the slot 22 is less than or equal to ±5°.

[0040] The working process of this utility model:

[0041] When the clamping claw 81 of the claw-type cylinder 8 is in the open state, the water pipe 5 and the water pipe joint 2 are placed in the centering clamp 3 together, and the placement position of the water pipe 5 is limited by the positioning clamp ring 6 and the support plate 7, such as Figure 1 shown.

[0042] When the claw cylinder 8 is in the closed state, the centering clamp 3 simultaneously clamps the water pipe joint 2 and the water pipe 5. Figure 3 As shown, the water pipe joint 2 and the water pipe 5 are ensured to be in a coaxial state during the welding and fixing process (positioned by the water pipe positioning hole 31 and the joint positioning hole 32), and at the same time, the electrode block 4 and the outer tube wall of the water pipe 5 always maintain a contact force of 5N.

[0043] When the above action is completed, the tapered electrode 1 locked with the welding gun is pressed down and inserted into the centering clamp 3. When the tapered surface 11 of the tapered electrode 1 contacts the inner cavity inclined surface 21 of the water pipe joint 2, discharge is performed, thereby welding and fixing the water pipe 5 and the water pipe joint 2. Figure 7 shown.

[0044] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A welding fixing structure for a water pipe joint of a coffee machine without welding marks, characterized in that: include: A water pipe positioning assembly, used for winding and fixing the water pipe (5); The centering clamp (3) comprises two relatively open and closed left and right parts, and each part is fixedly connected to an electrode block (4). The opening and closing part of the centering clamp (3) is used to place and position the water pipe joint (2). After the water pipe (5) passes through the electrode block (4), it extends into the water pipe joint (2) of the centering clamp (3) and contacts and is coaxially positioned with the water pipe joint (2). A claw-type cylinder (8) for clamping or releasing the two parts of the centering clamp (3); and The tapered electrode (1) arranged on the welding gun is used to extend into the water pipe joint (2) of the centering clamp (3) and discharge through the contact between the tapered surface (11) and the inclined surface (21) of the inner cavity of the water pipe joint (2).

2. The coffee machine water pipe joint welding fixing structure without welding marks according to claim 1 is characterized in that: When the centering clamp (3) is closed, a joint positioning hole (32) and a water pipe positioning hole (31) that are interconnected are formed at the center of the clamp, and a step (36) is provided between the joint positioning hole (32) and the water pipe positioning hole (31), so that the water pipe joint (2) inserted into the joint positioning hole (32) and the water pipe (5) inserted into the water pipe positioning hole (31) are coaxially positioned.

3. The weld-mark-free welding fixing structure for the water pipe joint of a coffee machine according to claim 2, characterized in that: The outer wall of the upper part of the water pipe joint (2) is provided with grooves (22) on both sides, and the top of the centering clamp (3) is provided with a notch (33), so that after the water pipe joint (2) is placed in the joint positioning hole (32), the groove (22) is exposed from the notch (33).

4. The weld-mark-free welding fixing structure for a water pipe joint of a coffee machine according to claim 3, characterized in that: After the water pipe joint (2) and the water pipe (5) are welded, the direction deviation of the clamping groove (22) is less than or equal to ±5°.

5. The weld-mark-free welding fixing structure for a water pipe joint of a coffee machine according to claim 1, characterized in that: The bottom of the centering clamp (3) is provided with a mounting groove (34) for receiving the electrode block (4).

6. The weld-mark-free welding fixing structure for a water pipe joint of a coffee machine according to claim 5, characterized in that: The centering clamp (3) is provided with a connection hole (35) for fixing and connecting the electrode block (4).

7. The coffee machine water pipe joint welding fixing structure without welding marks according to claim 1, characterized in that: The water pipe positioning assembly comprises a support plate (7) with a groove (71) formed on its surface and a positioning clamp (6) with a flange (61) provided at the end thereof. The flange (61) is embedded in the groove (71) and fixed therein, and the water pipe (5) is wound around the positioning clamp (6).

8. The weld-mark-free welding fixing structure for the water pipe joint of a coffee machine according to claim 7, characterized in that: The support plate (7) and the positioning snap ring (6) are both provided with fixing holes (9) for fixing the support plate (7) and the positioning snap ring (6) together.

9. The weld-mark-free welding fixing structure for a water pipe joint of a coffee machine according to claim 1, characterized in that: The two parts of the centering clamp (3) are arranged between two clamping claws (81) of the claw-type cylinder (8).

10. The coffee machine water pipe joint welding fixing structure without welding marks according to claim 1, characterized in that: When the claw-type cylinder (8) clamps the centering clamp (3), the electrode block (4) maintains a contact force of 5N with the outer wall of the water pipe (5).

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