Petal pipe forming die

Abstract

The invention discloses a petal pipe forming die, relates to the field of copper pipe forming, and aims to solve the problem of complicated petal pipe processing in the prior art, and adopts the technical scheme that a plurality of die units are arranged in an annular array, and forming teeth and guide surfaces are arranged on the die units. According to the petal pipe forming mold, the multiple mold units are arranged in the annular array mode and form the annular petal pipe forming mold, the mold units can be separated firstly and then loaded into a pipe blank, then the mold units are folded to conduct extrusion forming on the pipe blank, and petal pipe forming operation can be continuously conducted on a machining section part along with the pipe blank under traction of a pipe drawing bench. The petal pipe forming device is simple in structure, convenient to operate and capable of rapidly and stably conducting petal pipe forming operation.

Description

Technical Field

[0001] The invention relates to the technical field of copper tube forming, in particular to a petal tube forming die. Background Art

[0002] The heat exchange copper tube is an important component of the heat exchange system. The heat exchange effect is closely related to the contact area between the hot and cold media inside and outside the heat exchange copper tube. The petal tube has a large contact area due to its reciprocating bending structure, but its reciprocating bending tube wall is more complicated in the processing process. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a petal tube forming mold, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention discloses a petal tube forming mold, and the technical solution adopted is that it includes a mold unit, wherein there are multiple mold units and they are distributed in a ring array, and the end faces of the mold units are connected in sequence to form the petal tube forming mold of a ring structure; the mold unit is provided with forming teeth on one side close to the axis of the petal tube forming mold; the mold unit is provided with a guide surface along the axis direction of the petal tube forming mold on one side where the forming teeth are provided, and after the end faces of the mold units are connected in sequence, the guide surfaces of all the mold units can be connected; the mold unit is provided with a mounting structure. After the mold units are separated, it is convenient to load the tube blanks, and after the mold units are connected, the tube blanks can be formed by the forming teeth on the mold.

[0005] As a preferred technical solution of the present invention, the guide surface includes a front guide surface and a rear guide surface, which are arranged on both sides of the forming teeth. The two guide surfaces can be used for guiding the transition surface between the copper tube processing section and the non-processing section.

[0006] As a preferred technical solution of the present invention, the front guiding surface and the rear guiding surface have the same slope, and the depth of the front guiding surface is greater than the depth of the rear guiding surface.

[0007] As a preferred technical solution of the present invention, the mounting structure is a connecting hole, and the connecting hole is opened on two end faces of the mold unit along the axis direction of the petal tube forming mold. The mold unit can be mounted on a chuck to drive the mold unit to move.

[0008] Compared with the prior art, the present invention has the following beneficial effects: by arranging a plurality of die units in an annular array to form an annular petal tube forming die, the die units can be separated first and then loaded into a tube blank, and then the die units can be closed to extrude and form the tube blank, and the tube blank can be pulled by a tube drawing machine to continuously form the petal tube in the processing section. The present invention has a simple structure, is easy to operate, and can quickly and stably form the petal tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the mold unit structure of the present invention; Figure 4 It is a schematic diagram of the side structure of the mold unit of the present invention.

[0010] In the figure: 1. mold unit; 101. unit body; 102. front guide surface; 103. rear guide surface; 2. connecting hole; 3. forming tooth. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0012] like Figures 1 to 4 As shown, the present invention discloses a petal tube forming mold, which adopts a technical solution comprising a mold unit 1, the mold unit 1 is a fan ring with a central angle of 120 degrees, such as Figure 3 , Figure 4 As shown, the inner arc surface of the fan ring has forming teeth 3, and the two ends of the inner arc surface of the fan ring are respectively provided with a front guide surface 102 and a rear guide surface 103 along the axial direction of the petal tube forming mold. The inclination of the front guide surface 102 and the rear guide surface 103 is the same, and the depth of the front guide surface 102 is greater than the depth of the rear guide surface 103.

[0013] There are three groups of mold units 1 arranged in a circular array. The three groups of mold units 1 are connected to form a complete ring. In order to facilitate driving the mold unit 1, a connecting hole 2 is opened on the end face of the unit body 101 of the mold unit 1 along the axis direction of the petal tube forming mold, which can be connected to the chuck.

[0014] Working principle of the present invention: Use the connecting bolts to pass through and install the three sets of mold units 1 on the 3H-10 chuck, operate the chuck to open, separate the three sets of mold units 1, load the tube blank into the petal tube forming mold, and insert it to the starting end of the designed processing section, operate the chuck to close, close the three sets of mold units 1, press the tube blank into a petal-shaped outer wall through the forming teeth 3, and the transition section between the processing section and the non-processing section fits with the front guide surface 102 and the rear guide surface 103. Use the tube pulling machine to clamp the light end of the copper tube, pull the copper tube to move along the axial direction, and the forming teeth 3 press out continuous petal-shaped fins on the outer wall of the copper tube. When the petal tube forming mold reaches the end of the designed processing section, the tube pulling machine leaves the copper tube, operates the chuck to open, and removes the copper tube.

[0015] The mechanical connection involved in the present invention is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of tests, which is common knowledge.

[0016] Components not described in detail herein are prior art.

[0017] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A petal tube forming mold, characterized in that: The invention comprises a mold unit (1), wherein the mold units (1) are in plurality and arranged in a ring array, and the end faces of the mold units (1) are connected in sequence to form a petal tube forming mold of a ring structure; the mold unit (1) is provided with a molding tooth (3) on one side close to the axis of the petal tube forming mold; the mold unit (1) is provided with a guide surface along the axis of the petal tube forming mold on one side where the molding tooth (3) is provided, and after the end faces of the mold units (1) are connected in sequence, the guide surfaces of all the mold units (1) can be connected; and a mounting structure is provided on the mold unit (1).

2. The petal tube forming mold according to claim 1, characterized in that: The guide surface comprises a front guide surface (102) and a rear guide surface (103), which are arranged on both sides of the forming tooth (3).

3. The petal tube forming mold according to claim 2, characterized in that: The front guide surface (102) and the rear guide surface (103) have the same slope, and the depth of the front guide surface (102) is greater than the depth of the rear guide surface (103).

4. The petal tube forming mold according to claim 1, characterized in that: The mounting structure is a connection hole (2), and the connection hole (2) is provided on two end surfaces of the mold unit (1) along the axis direction of the petal tube forming mold.

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