Thermoforming die for three-way pipe fitting

Abstract

The utility model discloses a thermal forming die for a three-way pipe fitting. The die comprises a die holder, a drawing rod, a conical die and a plurality of layers of split dies, the conical die is located on one side of the die holder, and the small end of the conical die faces the die holder. An opening is formed in the die holder, the drawing rod penetrates out of the opening to be connected with the conical die, and the drawing rod can drive the conical die to move in the axial direction of the conical die. Each layer of split die comprises a plurality of petals, the plurality of petals are annularly arranged, the plurality of layers of split dies surround the conical die and are sequentially arranged in the radial direction of the conical die, and the die holder supports the plurality of layers of split dies; and the inner ring of the layer of sectioning die in contact with the conical die is attached to the conical surface of the conical die. The conical die is matched with the multiple layers of split dies, the conical die moves in the direction of the small end to enable the split dies to expand, and the outer rings of the split dies conduct flaring on a pipe opening of a three-way pipe fitting. The split dies are added or subtracted according to the pipe diameter of the three-way pipe fitting, so that the die is suitable for the three-way pipe fittings of various sizes, and flaring of the three-way pipe fittings of various sizes is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of metal pipe fitting processing, in particular to a three-way pipe fitting hot forming die. Background Art

[0002] Tee fittings are an extremely important standard pipe fitting in pipeline engineering and design. Common processing techniques for tee fittings include cutting, forming (hydraulic expansion), cutting, shaping, subsequent processing (polishing, cleaning, drying), inspection and packaging. The caliber of the tee fittings directly affects the installation and use, so the tee fittings should be expanded during the shaping process to ensure the size of the tee fittings.

[0003] Existing thermoforming molds for shaping generally use a pull rod to pull a conical core mold to expand the mouth of a tee pipe fitting. However, the conical core mold of the existing structure needs to be specifically designed according to tee pipe fittings of different sizes. Therefore, the existing thermoforming mold cannot expand the mouth of tee pipe fittings of various sizes. Utility Model Content

[0004] The utility model provides a three-way pipe fitting thermoforming die, which solves the technical problem that the existing thermoforming die cannot realize the expansion of three-way pipe fittings of various sizes.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A three-way pipe fitting thermoforming die comprises: a die base, a drawing rod, a tapered die and several layers of split die; the tapered die is located on one side of the die base, and the small end of the tapered die faces the die base; an opening is provided on the die base, and the drawing rod passes through the opening to connect with the tapered die, and the drawing rod can drive the tapered die to move axially along the tapered die; each layer of the split die comprises a plurality of petals, and the plurality of petals are arranged in a ring shape, and several layers of the split die surround the tapered die and are arranged in sequence along the radial direction of the tapered die, and the die base supports the plurality of layers of the split die; the inner ring of a layer of the split die in contact with the tapered die fits the tapered surface of the tapered die.

[0007] Furthermore, the outer rings of the plurality of split molds are adapted to the standard size table of pipe diameters of tee pipe fittings in sequence.

[0008] Furthermore, the cone module is a prism, and the cross section of the prism is a regular polygon.

[0009] Furthermore, a through hole is opened in the center of the conical die, and a drawing rod passes through the through hole and is coaxial with the through hole; an annular groove is opened on the drawing rod, and a clamping ring is installed in the annular groove. The clamping ring is located on the large end side of the conical die, and the size of the clamping ring is larger than the aperture of the through hole.

[0010] Furthermore, an oil cylinder is fixedly arranged on the die base, and one end of the pulling rod away from the conical die is connected to the oil cylinder.

[0011] Furthermore, the mold base includes a support base and a pad, the pad is arranged on the support base, and a plurality of layers of split molds are placed on the upper surface of the pad.

[0012] Beneficial effects:

[0013] First, the conical die of the present application moves under the drive of the pulling rod, and the large end of the conical die continuously moves toward the small end, and the large end of the conical die continuously squeezes and pushes the innermost layer of the split die, so that the split die expands, and the outer ring of the split die performs the first expansion of the pipe mouth of the tee pipe fitting; after the tee pipe fitting is rotated to a certain angle, the second expansion is performed to complete the expansion of the pipe mouth of the tee pipe fitting. The outer rings of several layers of split die correspond to the pipe diameters of tee pipe fittings of various sizes, and the split die is added or subtracted according to the pipe diameter of the tee pipe fitting, so that the mold can adapt to tee pipe fittings of various sizes and complete the expansion of tee pipe fittings of various sizes.

[0014] Second, the present application can adjust the split mold according to the standard size of the pipe diameter of the tee pipe fitting by sequentially adapting the outer rings of several layers of split molds to the standard size table of the pipe diameter of the tee pipe fitting, thereby facilitating the adjustment of the mold and simplifying the operation of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of a three-way pipe fitting thermoforming mold disclosed in the utility model;

[0017] Figure 2 The utility model discloses a top view of a three-way pipe fitting thermoforming mold.

[0018] 1. Die base; 11. Support base; 12. Pad; 2. Pull rod; 3. Conical die; 4. Split die; 5. Snap ring; 6. Cylinder. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] A three-way pipe fitting thermoforming die, combined with Figure 1 and Figure 2 As shown, it includes: a die base 1, a drawing rod 2, a conical die 3 and several layers of split-petal dies 4; the die base 1 is arranged horizontally, and the conical die 3 is located on one side of the die base 1. In this embodiment, the conical die 3 is located above the die base 1. The small end of the conical die 3 faces the die base 1, and the axis of the conical die 3 is arranged vertically; a circular opening is opened on the die base 1, and the drawing rod 2 passes through the opening to connect the conical die 3, and the drawing rod 2 can drive the conical die 3 to move along the axial direction of the conical die 3; each layer of the split-petal die 4 includes a plurality of petals, and the plurality of petals are arranged in a ring shape; in the figure, a layer of the split-petal die 4 in contact with the conical die 3 has 8 petals, and the other layers of the split-petal die 4 have 4 petals, and the number of petals can be adjusted as needed. Several layers of split molds 4 surround the conical mold 3 and are arranged in sequence along the radial direction of the conical mold 3. The lower surface of the split mold 4 abuts against the mold base 1. The number of layers of the split mold 4 in the figure is 5, and the number of layers of the split mold 4 can be set to one or more layers as needed; the inner circle of a layer of split mold 4 in contact with the conical mold 3 is fitted with the conical surface of the conical mold 3, and the curvature of the outer circle of the petals of different layers of the split mold 4 corresponds to the pipe diameters of three-way pipe fittings of different sizes.

[0021] When expanding the pipe mouth of the tee pipe fitting, the pipe mouth of the tee pipe fitting is placed on the outside of the split mold 4, and the small diameter end of the conical mold 3 is inserted into the space surrounded by the innermost split mold 4; the conical mold 3 moves downward under the pull of the pulling rod 2. During the downward movement of the conical mold 3, the large end of the conical mold 3 continuously moves downward, thereby continuously squeezing and pushing the innermost split mold 4, so that the innermost split mold 4 expands, and the innermost split mold 4 then pushes the other layers of split molds 4 outside it to expand. The outer ring of the outermost split mold 4 expands the pipe mouth of the tee pipe fitting for the first time. In order to avoid the position between the two petals of the split mold 4, the tee pipe fitting is rotated at a certain angle so that the position of the tee pipe fitting where the prismatic shape is likely to appear corresponds to the petal, and then the second expansion is performed, so that the inner wall of the pipe mouth of the tee pipe fitting is squeezed and expanded, and finally the expansion of the pipe mouth of the tee pipe fitting is completed. The radians of the outer circles of the petals of the several layers of the petal mold 4 correspond to the diameters of tee pipe fittings of various sizes. The petal mold 4 is added or subtracted according to the diameter of the tee pipe fitting, so that the mold can adapt to tee pipe fittings of various sizes and complete the expansion of tee pipe fittings of various sizes.

[0022] Preferably, the outer rings of the plurality of layers of split molds 4 are adapted to the standard size table of the pipe diameter of the tee pipe fittings in turn. By designing the radians of the outer rings of the petals of the plurality of layers of split molds 4 according to the standard size table of the pipe diameter of the tee pipe fittings, when the tee pipe fittings of a certain standard size need to be expanded, the split molds 4 can be quickly added or subtracted to achieve mold adjustment and switching, thereby achieving the effect of facilitating mold adjustment and simplifying mold operation.

[0023] Preferably, the conical mold 3 is a prism, and the cross section of the prism is a regular polygon. The figure takes the cross section of the prism as a regular octagon as an example for explanation. The fitting surface of the conical mold 3 and the petal mold 4 is designed to be an inclined surface, and the inclined surfaces of the conical mold 3 and the petal mold 4 slide against each other. The petals of the petal mold 4 move outward under the push of the inclined surface of the conical mold 3 to realize the expansion of the petal mold 4, thereby avoiding the problem that when the conical mold 3 is conical, the position with a larger curvature radius on the conical mold 3 is easily stuck with the position with a smaller curvature radius on the petals of the petal mold 4.

[0024] Preferably, a through hole is opened in the center of the conical die 3, and the drawing rod 2 passes through the through hole and is coaxial with the through hole; an annular groove is opened on the drawing rod 2, and a snap ring 5 is installed in the annular groove. The snap ring 5 is U-shaped and inserted into the annular groove; the snap ring 5 is located on the large end side of the conical die 3, that is, the snap ring 5 is located on the upper side of the conical die 3, and the size of the snap ring 5 is larger than the aperture of the through hole. When the drawing rod 2 moves downward, the drawing rod 2 drives the snap ring 5 to move through the annular groove, and after the lower surface of the snap ring 5 abuts against the upper surface of the conical die 3, the snap ring 5 drives the conical die 3 to move downward.

[0025] Preferably, an oil cylinder 6 is fixedly arranged on the die base 1, and one end of the drawing rod 2 away from the conical die 3 can be connected to the oil cylinder 6 by a threaded connection. The oil cylinder 6 provides power to drive the drawing rod 2 to move.

[0026] Preferably, the die base 1 includes a support base 11 and a pad 12, the pad 12 is arranged on the support base 11, and the centers of the support base 11 and the pad 12 are provided with circular openings and correspond to each other; the cylinder body of the oil cylinder 6 is fixed below the support base 11 by screws, and the piston rod of the oil cylinder 6 penetrates the opening of the support base 11 and is connected to the drawing rod 2. Several layers of split molds 4 are placed on the upper surface of the pad 12, and the upper surface of the pad 12 has high processing accuracy and roughness to ensure smooth sliding of the petals.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A three-way pipe fitting thermoforming mold, characterized in that: include: A die base (1), a drawing rod (2), a conical die (3) and a plurality of layers of split dies (4); the conical die (3) is located on one side of the die base (1), and the small end of the conical die (3) faces the die base (1); an opening is provided on the die base (1), the drawing rod (2) passes through the opening to connect to the conical die (3), and the drawing rod (2) can drive the conical die (3) to move along the axial direction of the conical die (3); each layer of the split dies (4) includes a plurality of petals, and the plurality of petals are arranged in a ring shape, and a plurality of layers of the split dies (4) surround the conical die (3) and are sequentially arranged along the radial direction of the conical die (3), and the die base (1) supports a plurality of layers of the split dies (4); the inner ring of a layer of the split dies (4) in contact with the conical die (3) fits the conical surface of the conical die (3).

2. A three-way pipe fitting thermoforming mold according to claim 1, characterized in that: The outer rings of the plurality of layers of the split molds (4) are adapted in sequence to the standard size table of the pipe diameter of the three-way pipe fitting.

3. A three-way pipe fitting thermoforming mold according to claim 1, characterized in that: The conical mold (3) is a prism, and the cross section of the prism is a regular polygon.

4. A three-way pipe fitting thermoforming mold according to claim 1, characterized in that: The conical die (3) has a through hole at its center, and the drawing rod (2) passes through the through hole and is coaxial with the through hole; the drawing rod (2) has an annular groove, and a retaining ring (5) is installed in the annular groove. The retaining ring (5) is located on the large end side of the conical die (3), and the size of the retaining ring (5) is larger than the aperture of the through hole.

5. The three-way pipe fitting thermoforming mold according to claim 1, characterized in that: An oil cylinder (6) is fixedly arranged on the die base (1), and one end of the drawing rod (2) away from the conical die (3) is connected to the oil cylinder (6).

6. The three-way pipe fitting thermoforming mold according to claim 1, characterized in that: The mold base (1) comprises a support base (11) and a pad (12), wherein the pad (12) is arranged on the support base (11), and a plurality of layers of the split molds (4) are placed on the upper surface of the pad (12).

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