A female thread core head for forming a female thread copper pipe

Abstract

The utility model discloses a female thread core head for female thread copper pipe forming relates to thread tapping technical field, the utility model discloses a tap, water injection subassembly and pipe pressing subassembly, the one end of tap is fixed with axle disc and axle rod, and its inside is provided with water injection channel, and a group of water holes is seted up in the lateral wall, water injection subassembly includes water storage bottle and water storage bottle cover, and the one end of water storage bottle cover is fixed with water injection pipe head, and this water injection pipe head is screwed in the water injection channel of tap, and water storage bottle is fixedly sleeved in the other end of water storage bottle cover, and pipe pressing subassembly is sleeved in the outside of axle rod. The utility model discloses through with water storage bottle and tap into the copper pipe, and the tap rotation is extruded and taps in the copper pipe inner wall, and the water in water storage bottle enters the water injection channel in the tap, and is scattered from the water hole in the lateral wall of tap, to cool the copper pipe inner wall, through with pipe pressing subassembly and press in the outer wall of copper pipe, prevent the tap from causing copper pipe expansion when tapping copper pipe.

Description

Technical Field

[0001] This utility model belongs to the field of thread tapping technology, and in particular relates to an internal thread mandrel for forming internal thread copper tubes. Background Technology

[0002] The forming process of internally threaded copper tubes has long faced technical bottlenecks. The frictional heat generated during traditional tapping can easily cause the copper tube material to soften during annealing, resulting in loss of thread precision and deterioration of surface roughness. Conventional cooling solutions cannot accurately deliver the cooling medium to the processing area due to structural limitations, and external spraying is inefficient and causes environmental pollution. At the same time, the unbalanced distribution of radial extrusion pressure can cause plastic deformation of the copper tube, resulting in out-of-tolerance diameter and excessive ellipticity. This directly affects the sealing performance and fatigue life of the product, restricting the application of high-precision refrigeration copper tubes in high-end fields.

[0003] To address these issues, we provide an internally threaded mandrel for forming internally threaded copper tubes. Utility Model Content

[0004] The purpose of this invention is to provide an internal thread mandrel for forming internally threaded copper tubes. One end of the tap is connected to a water bottle cap, and a water bottle is fitted onto one side of the cap. When tapping the internal thread of the copper tube, the water bottle and tap are inserted into the tube, driving the tap to rotate and press against the inner wall of the tube. Simultaneously, water from the water bottle enters the water injection channel inside the tap and exits through the water distribution holes on the side wall of the tap, thereby cooling the inner wall of the copper tube. A pressure tube assembly is installed on the outside of the shaft at one end of the tap, pressing it against the outer wall of the copper tube to prevent expansion of the copper tube during tapping.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is an internal thread core for forming internal threaded copper tubes, including a tap, a water injection assembly, and a pressing assembly. The water injection assembly includes a water storage bottle and a water storage bottle cap. One end of the tap is fixed with a shaft plate, and the end of the shaft plate away from the tap is fixed with a shaft rod. The end of the tap away from the shaft plate has a water injection channel. A set of water distribution holes are opened on the side wall of the tap, and the water distribution holes communicate with the water injection channel. One end of the water storage bottle cap is fixed with a water injection tube head, which is threaded onto the inner wall of the water injection channel. The open end of the water storage bottle is fixedly sleeved on the side of the water storage bottle cap away from the water injection tube head. The pressing assembly is sleeved on the outside of the shaft rod.

[0006] A further feature of this invention is that a water injection piston is slidably sleeved inside the water storage bottle, and a compression spring is sleeved inside the water storage bottle. The two ends of the compression spring are respectively fixedly connected to the end face of the water injection piston and the inner bottom surface of the water storage bottle, and a vent hole is provided through the bottom surface of the water storage bottle.

[0007] A further feature of this invention is that a horizontal sliding frame is fixedly provided at the end of the water bottle cap away from the water injection pipe head, and two stop valves are horizontally slidably sleeved inside the horizontal sliding frame.

[0008] A further feature of this invention is that a leaf spring is fixedly connected to each of the two stop valves on the side away from each other, and the end of the leaf spring away from the stop valve is fixedly connected to the inner top surface of the horizontal sliding frame.

[0009] A further feature of this invention is that the tube pressing assembly includes a mounting sleeve, a set of roller seats, and a set of tube pressing rollers. The mounting sleeve is fixedly sleeved on the outside of the shaft, and one side of the mounting sleeve is in contact with one side of the shaft. A set of sliding sleeves is fixedly arranged in a circumferential array on the outer side of the mounting sleeve. The sliding sleeves are U-shaped structures with their openings facing the axis of the mounting sleeve. The sliding sleeves extend toward one side of the tap. Each roller seat is slidably sleeved in its respective sliding sleeve, and each tube pressing roller is rotatably installed in its respective sliding sleeve.

[0010] A further feature of this invention is that the two side plates of the slide seat sleeve are respectively provided with slide grooves, the length direction of the slide grooves is perpendicular to the edge of the mounting plate, and the two ends of the roller seat are respectively slidably sleeved in the two side slide grooves.

[0011] A further feature of this invention is that an adjusting screw is threaded through the upper top plate of the slide sleeve, and one end of the adjusting screw is rotatably mounted on the side of the roller seat away from the pressure tube roller.

[0012] This utility model has the following beneficial effects: This invention connects a water bottle cap to one end of a tap, and a water bottle is fitted onto one side of the cap. When tapping the internal threads of a copper tube, the water bottle and tap are inserted into the copper tube, driving the tap to rotate. This causes the tap to press and tap the inner wall of the copper tube. At the same time, water from the water bottle enters the water injection channel inside the tap and is discharged from the water dispersing hole on the side wall of the tap, thereby cooling the inner wall of the copper tube.

[0013] This invention installs a pressure tube assembly on the outside of the shaft at one end of the tap, pressing the pressure tube assembly against the outer wall of the copper tube to prevent the copper tube from expanding when the tap taps the copper tube. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of an internal thread mandrel used for forming internal threaded copper tubes.

[0016] Figure 2 This is a side sectional view of the tap and water injection assembly.

[0017] Figure 3 This is a schematic diagram of the structure of the water storage bottle cap and the stop valve.

[0018] Figure 4 This is a front view of the pressure tube assembly.

[0019] Figure 5 This is a schematic diagram of the pressure tube assembly and tap.

[0020] The attached diagram lists the components represented by each number as follows: 1-Tap, 101-Shaft plate, 102-Shaft rod, 103-Water injection channel, 103a-Water distribution hole, 2-Water injection assembly, 201-Water storage bottle, 201a-Water injection piston, 201a-1-Compression spring, 201b-Ventilation hole, 202-Water storage bottle cap, 202a-Water injection pipe head, 202b-Horizontal sliding frame, 202b-1-Baffle valve, 202b-2-Leaf spring, 3-Pressing pipe assembly, 301-Mounting sleeve, 301a-Slide sleeve, 301a-1-Slide groove, 301a-2-Adjusting screw, 302-Roller seat, 303-Pressing pipe roller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Example 1

[0022] Please see Figures 1 to 3 This utility model is an internal thread core for forming internal threaded copper tubes, including a tap 1, a water injection assembly 2, and a pressing assembly 3. The water injection assembly 2 includes a water storage bottle 201 and a water storage bottle cap 202. By connecting the water storage bottle cap 202 to one end of the tap 1, and fitting the water storage bottle 201 onto one side of the water storage bottle cap 202, when internally tapping the copper tube, the water storage bottle 201 and the tap 1 are inserted into the copper tube, driving the tap 1 to rotate, so that the tap 1 squeezes and taps the inner wall of the copper tube. At the same time, the water in the water storage bottle 201 enters the water injection channel 103 in the tap 1 and is discharged from the water dispersing hole 103a on the side wall of the tap 1, thereby cooling the inner wall of the copper tube. By installing the pressing assembly 3 on the outside of the shaft 102 at one end of the tap 1, the pressing assembly 3 is pressed against the outer wall of the copper tube to prevent the copper tube from expanding when the tap 1 taps the copper tube.

[0023] Specifically, a shaft disk 101 is fixed at one end of the tap 1, a shaft rod 102 is fixed at the end of the shaft disk 101 away from the tap 1, a water injection channel 103 is opened at the end of the tap 1 away from the shaft disk 101, a set of water dispersing holes 103a are opened on the side wall of the tap 1, the water dispersing holes 103a are connected to the water injection channel 103, a water injection pipe head 202a is fixed at one end of the water storage bottle cap 202, the water injection pipe head 202a is threaded into the inner wall of the water injection channel 103, the open end of the water storage bottle 201 is fixedly sleeved on the side of the water storage bottle cap 202 away from the water injection pipe head 202a, and the pressure pipe assembly 3 is sleeved on the outside of the shaft rod 102.

[0024] Furthermore, a water injection piston 201a is slidably sleeved inside the water storage bottle 201, and a compression spring 201a-1 is sleeved inside the water storage bottle 201. The two ends of the compression spring 201a-1 are respectively fixedly connected to the end face of the water injection piston 201a and the inner bottom surface of the water storage bottle 201. A vent hole 201b is opened through the bottom surface of the water storage bottle 201. The compression spring 201a-1 squeezes the water injection piston 201a, causing the water injection piston 201a to inject water from the water storage bottle 201 into the water injection channel 103 in the tap 1. Under the action of centrifugal force, the water in the water injection channel 103 is thrown from the water outlet 103a to the inner wall of the copper tube, thereby dissipating heat from the inner wall of the copper tube.

[0025] Furthermore, a horizontal sliding frame 202b is fixedly provided at the end of the water bottle cap 202 away from the water injection pipe head 202a, and two stop valves 202b-1 are horizontally slidably sleeved inside the horizontal sliding frame 202b.

[0026] Furthermore, a leaf spring 202b-2 is fixedly connected to each of the two stop valves 202b-1 on the side away from each other. The end of the leaf spring 202b-2 away from the stop valve 202b-1 is fixedly connected to the inner top surface of the horizontal sliding frame 202b. When the tap 1 rotates, the two stop valves 202b-1 squeeze the leaf spring 202b-2 under the action of centrifugal force, thereby allowing the water in the water storage bottle 201 to enter the water injection pipe head 202a.

[0027] The operation process in this embodiment is as follows: When tapping the internal threads of the copper tube, the water storage bottle 201 and the tap 1 are inserted into the copper tube, and the tap 1 is driven to rotate, so that the tap 1 squeezes and taps the inner wall of the copper tube. When the tap 1 rotates, the two stop valves 202b-1 squeeze the leaf spring 202b-2 under the action of centrifugal force, and the compressed spring 201a-1 squeezes the water injection piston 201a, so that the water injection piston 201a injects the water in the water storage bottle 201 into the water injection channel 103 in the tap 1. Under the action of centrifugal force, the water in the water injection channel 103 is thrown from the water outlet 103a to the inner wall of the copper tube, so as to dissipate heat from the inner wall of the copper tube. Example 2

[0028] Please see Figures 1 to 5Based on Embodiment 1, the pressing tube assembly 3 includes a mounting sleeve 301, a set of roller seats 302, and a set of pressing tube rollers 303. By mounting the mounting sleeve 301 on the outside of the shaft 102, and fixing a set of sliding seat sleeves 301a in a circumferential array on the outer side of the mounting sleeve 301, each roller seat 302 is slidably installed in each sliding seat sleeve 301a, and the pressing tube rollers 303 are rotatably installed in the roller seats 302, so that each pressing tube roller 303 presses the outer wall of the copper tube. When the tap 1 rotates, the pressing tube rollers 303 press against the outer wall of the copper tube and rotate with the tap 1, thereby preventing the copper tube from expanding outward.

[0029] Specifically, the mounting sleeve 301 is fixedly sleeved on the outside of the shaft 102, and one side of the mounting sleeve 301 is attached to one side of the shaft 101. A set of sliding sleeves 301a are fixedly arranged in a circumferential array on the outer side of the mounting sleeve 301. The sliding sleeves 301a are U-shaped structures with their openings facing the axis of the mounting sleeve 301. The sliding sleeves 301a extend toward one side of the tap 1. Each roller seat 302 is slidably sleeved in each sliding sleeve 301a, and each pressure roller 303 is rotatably installed in each roller seat 302.

[0030] Furthermore, the two side plates of the slide sleeve 301a are respectively provided with slide grooves 301a-1. The length direction of the slide grooves 301a-1 is perpendicular to the edge of the mounting plate 301. The two ends of the roller seat 302 are respectively slidably sleeved in the two slide grooves 301a-1.

[0031] Furthermore, an adjusting screw 301a-2 is threaded through the upper top plate of the slide sleeve 301a. One end of the adjusting screw 301a-2 is rotatably mounted on the side of the roller seat 302 away from the pressure roller 303. Rotating the adjusting screw 301a-2 makes the pressure roller 303 fit tightly against the outer wall of the copper tube.

[0032] The operation process in this embodiment is as follows: Rotate the adjusting screw 301a-2 to make the pressure roller 303 stick to the outer wall of the copper tube. When the tap 1 rotates, the pressure roller 303 presses against the outer wall of the copper tube and rotates with the tap 1, thereby preventing the copper tube from expanding outward.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An internal thread mandrel for forming internally threaded copper tubes, comprising a tap (1), a water injection assembly (2), and a tube pressing assembly (3), characterized in that: The water injection assembly (2) includes a water storage bottle (201) and a water storage bottle cap (202). One end of the tap (1) is fixed with a shaft disc (101). The end of the shaft disc (101) away from the tap (1) is fixed with a shaft rod (102). The end of the tap (1) away from the shaft disc (101) is provided with a water injection channel (103). A set of water dispersing holes (103a) is provided on the side wall of the tap (1). The water dispersing holes (103a) are connected to the water injection channel (103). One end of the water storage bottle cap (202) is fixed with a water injection pipe head (202a). The water injection pipe head (202a) is threaded onto the inner wall of the water injection channel (103). The open end of the water storage bottle (201) is fixedly sleeved on the side of the water storage bottle cap (202) away from the water injection pipe head (202a). The pressure pipe assembly (3) is sleeved on the outside of the shaft rod (102).

2. The internal thread mandrel for forming internally threaded copper tubes according to claim 1, characterized in that: A water injection piston (201a) is slidably sleeved inside the water storage bottle (201). A compression spring (201a-1) is sleeved inside the water storage bottle (201). The two ends of the compression spring (201a-1) are respectively fixedly connected to the end face of the water injection piston (201a) and the inner bottom surface of the water storage bottle (201). A vent hole (201b) is provided through the bottom surface of the water storage bottle (201).

3. The internal thread mandrel for forming internally threaded copper tubes according to claim 2, characterized in that: The end of the water bottle cap (202) away from the water injection pipe head (202a) is fixed with a horizontal sliding frame (202b), and two stop valves (202b-1) are horizontally slidably sleeved inside the horizontal sliding frame (202b).

4. The internal thread mandrel for forming internally threaded copper tubes according to claim 3, characterized in that: A leaf spring (202b-2) is fixedly connected to each of the two stop valves (202b-1) on the side away from each other. The end of the leaf spring (202b-2) away from the stop valve (202b-1) is fixedly connected to the inner top surface of the horizontal slide frame (202b).

5. The internal thread mandrel for forming internally threaded copper tubes according to claim 1, characterized in that: The tube pressing assembly (3) includes a mounting sleeve (301), a set of roller seats (302) and a set of tube pressing rollers (303). The mounting sleeve (301) is fixedly sleeved on the outside of the shaft (102). One side of the mounting sleeve (301) is attached to one side of the shaft (101). A set of sliding sleeves (301a) is fixedly arranged in a circumferential array on the outer side of the mounting sleeve (301). The sliding sleeves (301a) are U-shaped structures with the opening facing the axis of the mounting sleeve (301). The sliding sleeves (301a) extend to one side of the tap (1). Each roller seat (302) is slidably sleeved in each sliding sleeve (301a). Each tube pressing roller (303) is rotatably installed in each sliding sleeve (301a).

6. The internal thread mandrel for forming internally threaded copper tubes according to claim 5, characterized in that: The two side plates of the slide sleeve (301a) are respectively provided with slide grooves (301a-1). The length direction of the slide grooves (301a-1) is perpendicular to the edge of the mounting plate (301). The two ends of the roller seat (302) are respectively slidably sleeved in the two slide grooves (301a-1).

7. The internal thread mandrel for forming internally threaded copper tubes according to claim 6, characterized in that: An adjusting screw (301a-2) is threaded through the upper top plate of the sliding sleeve (301a). One end of the adjusting screw (301a-2) is rotatably mounted on the side of the roller seat (302) away from the pressure roller (303).

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