Punching die device with double-layer horn mouth

Abstract

The utility model provides a stamping die device of a double-layer horn mouth. The stamping die device of the double-layer horn mouth comprises a clamping assembly, a plain end stamping die assembly and a horn mouth stamping die assembly. The clamping assembly comprises a first clamping position and a second clamping position which are arranged side by side and used for fixing a connecting pipe. The plain-end stamping die assembly comprises a plain-end driving part and a plain-end stamping die shaft, and the axis of the plain-end stamping die shaft coincides with the axis of the first clamping position; the horn mouth stamping die assembly comprises a horn mouth driving piece and a horn mouth stamping die shaft, and the axis of the horn mouth stamping die shaft coincides with the axis of the second clamping position. And the bell mouth stamping die shaft performs secondary stamping on the connecting pipe stamped by the plain end stamping die shaft to form a double-layer bell mouth. According to the application, the outer diameter of the end part of the connecting pipe is reduced through the plain end stamping die assembly, and then the horn mouth stamping die is performed on the end part of the connecting pipe, so that a double-layer horn mouth structure is formed at the end part of the connecting pipe, the problems of eccentricity, cracking and the like of a single-layer horn mouth can be avoided, and the connection sealing performance of the connecting pipe is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bell mouth punching dies, in particular to a double-layer bell mouth punching die device. Background Art

[0002] The connecting pipe is an important component connecting the outdoor main unit and the indoor unit. Only through the connection of the connecting pipe can the refrigerant form a closed loop in the entire air conditioning system. When the connecting pipe is used to connect different components, the end of the connecting pipe needs to be expanded to form a bell-mouth structure to facilitate the sealed connection between different components.

[0003] The prior art is to directly expand the connecting pipe into a single-layer bell-mouth shape, that is, directly expand the end of the connecting pipe so that the end wall of the connecting pipe forms a bell-mouth structure. The single-layer bell-mouth structure is then sleeved with the conical surface of the pipe joint to form a sealing structure. The single-layer bell-mouth structure has many quality problems. For example, during the expansion process, because the wall of the connecting pipe is relatively thin, it is easy to have quality problems such as bell-mouth curling, eccentricity, and cracking, which affects the sealing effect, causes refrigerant leakage, and affects the refrigerant circulation efficiency. Utility Model Content

[0004] In order to overcome the problems existing in the related technology, the purpose of the utility model is to provide a double-layer bell-mouth die device, which first reduces the outer diameter of the end of the connecting pipe through a flat-mouth die assembly, and then performs a bell-mouth die on the end of the connecting pipe, so that the end of the connecting pipe forms a double-layer bell-mouth structure. The double-layer bell-mouth has a larger thickness, which can avoid problems such as eccentric cracking that occur in a single-layer bell-mouth, thereby improving the connection sealing of the connecting pipe.

[0005] A double-layer bell mouth die device, comprising:

[0006] The clamping assembly comprises a first clamping position and a second clamping position arranged in parallel for fixing the connecting pipe;

[0007] The flat die assembly comprises a flat die driving member and a flat die shaft, wherein the axis of the flat die shaft coincides with the axis of the first clamping position; the flat die driving member can drive the flat die shaft to move in a direction away from or close to the first clamping position;

[0008] The bell-mouth die assembly comprises a bell-mouth drive and a bell-mouth die shaft, wherein the axis line of the bell-mouth die shaft coincides with the axis line of the second clamping position; the bell-mouth drive can drive the bell-mouth die shaft to move in a direction away from or close to the second clamping position; and a second die is performed on the connecting pipe after being punched by the flat-mouth die shaft to form a double-layer bell mouth.

[0009] The front end of the retracted port of the present application shrinks toward the axial center line direction of the connecting pipe after passing through the flat-mouth die assembly. At this time, the bell-mouth die is performed to fold the retracted port into the interior of the connecting pipe to form a double-layer bell-mouth structure. The double-layer bell-mouth has a larger thickness than the single-layer bell-mouth, avoiding the cracking, curling and other problems of the single-layer bell-mouth in the prior art, and improving the sealing performance of the connecting pipe.

[0010] In a preferred technical solution of the utility model, one end of the flat-mouth die shaft is connected to a flat-mouth driving member, and the other end is provided with a die groove, a die protrusion is provided in the die groove, and the axial centerline of the die protrusion coincides with the axial centerline of the die groove; the outer diameter of the die protrusion is smaller than the inner diameter of the connecting tube, and the inner diameter of the die groove is larger than the outer diameter of the connecting tube.

[0011] When the protrusion of the die abuts against the connecting tube, the connecting tube is nested on the outside of the protrusion of the die and does not contact the protrusion of the die. In the present application, the flat-mouthed driving member drives the flat-mouthed die shaft to move at high speed toward the end of the connecting tube, so that the connecting tube collides with the groove of the die. During the collision, the end of the connecting tube is deformed to form a retracted port. From the port at the undeformed connecting tube to the retracted port, the outer diameter of the retracted port first increases and then decreases, and finally the outer diameter of the retracted port away from the end of the connecting tube is smaller than the original outer diameter of the connecting tube. The purpose of the flat-mouthed die assembly is to deform the end of the connecting tube to form a retracted port. The outer diameter of the retracted port away from the end of the connecting tube is smaller than the outer diameter of the connecting tube, so that the retracted port can be folded into the interior of the connecting tube during the subsequent bell-mouthed die.

[0012] In a preferred technical solution of the utility model, the connecting pipe is a cylindrical structure, the die groove is a cylindrical groove, and the die protrusion is a cylindrical structure.

[0013] When the flat die shaft is driven by the flat drive member and moves at high speed toward the fixed connecting pipe, the end of the connecting pipe is nested outside the die protrusion, and at the same time, the end collides with the bottom of the die groove at high speed. Under the action of the collision, the end of the connecting pipe is deformed to form an inwardly contracted port. Similarly, when the cross-section of the connecting pipe is other polygonal structures, the structures of the die groove and the die protrusion are also adapted to the connecting pipe.

[0014] In a preferred technical solution of the utility model, one end of the bell-mouth die shaft is connected to the bell-mouth drive member, and the other end is a truncated cone-shaped die member, the cross-sectional area of ​​the front end of the die member is smaller than the cross-sectional area of ​​the rear end of the die member, and the outer diameter of the front end of the die member is smaller than the inner diameter of the connecting pipe; the front end of the die member refers to the end of the die member away from the bell-mouth die shaft.

[0015] When the bell-mouth driving member drives the bell-mouth die shaft to move at high speed toward the retracted port in the fixed connecting tube, the retracted port collides with the die piece. Since the inner diameter of the retracted port at the position where the die piece abuts is smaller, under the action of the high-speed collision, the retracted port is folded into the inside of the connecting tube by the collision, forming a double-layer bell-mouth structure. Since the die piece is a truncated cone structure, the retracted port is expanded again after being folded into the connecting tube, forming a bell-mouth structure that matches the shape of the die piece. The present application also needs to ensure that the axis center line of the die piece coincides with the axis center line of the bell-mouth die shaft, and coincides with the axis center line of the retracted port and the connecting tube. In this way, it can be ensured that when the connecting tube abuts the die piece, the centers of the two coincide, thereby forming a uniform bell-mouth shape.

[0016] In a preferred technical solution of the utility model, a guide protrusion is provided on the side of the die part away from the bell-mouth die axis, and the outer diameter of the guide protrusion is smaller than the inner diameter of the retracted port in the connecting pipe. The retracted port refers to the end of the connecting pipe after being punched by the flat-mouth die assembly.

[0017] In the present application, the die piece is a truncated cone structure, and the retracted port is folded into the interior of the connecting tube during the collision of the die piece. At the same time, the front end section of the truncated cone die piece is smaller than the inner diameter of the connecting tube, and the rear end section is larger than the inner diameter of the connecting tube. The front end refers to the end away from the flared die axis. In this way, it can be ensured that the inner diameter of the flared mouth formed after the die is larger than the inner diameter of the original connecting tube, and it can be ensured that the flared mouth position is a double-layer structure. The double-layer structure refers to the original connecting tube wall and the tube wall of the retracted port folded into the interior of the connecting tube.

[0018] In a preferred technical solution of the utility model, the flat-mouth die axis and the bell-mouth die axis extend along a first direction, and the clamping assembly is located on the side of the flat-mouth die axis away from the flat-mouth driving member; the connecting direction of the first clamping position and the second clamping position is a second direction, and the second direction is perpendicular to the first direction.

[0019] When the two die assemblies are arranged along the left and right directions of the horizontal direction, the clamping assembly is arranged on the side of the die shaft away from the driving member, and the clamping assembly is arranged front and back in the horizontal direction. This can ensure that the movement direction of the die shaft is the same during the two punchings. When the connecting tube switches between the first clamping position and the second clamping position, it is necessary to change the direction of the connecting tube by moving the position of the connecting tube.

[0020] In a preferred technical solution of the utility model, the clamping assembly includes a clamping fixed mold and a clamping movable mold, and semicircular grooves are respectively provided in the clamping fixed mold and the clamping movable mold. When the clamping movable mold and the clamping fixed mold are closed, the corresponding two semicircular grooves form a clamping position.

[0021] The clamping assembly in the present application adopts a structure in which a clamping movable die and a clamping fixed die cooperate with each other. The structure is simple and can realize quick clamping and loosening of the connecting pipe, thereby improving the efficiency of the punching die.

[0022] In a preferred technical solution of the utility model, the connection direction of the clamping fixed mold and the clamping movable mold is the third direction, and the third direction is perpendicular to the first direction and the second direction at the same time.

[0023] By setting a flat die axis and a bell-mouth die axis that move left and right, a first clamping position and a second clamping position set front and back, and a clamping movable die and a clamping fixed die set up and down, smooth switching of the two dies can be achieved and the floor space of the die device is saved.

[0024] In a preferred technical solution of the utility model, the clamping movable mold is connected to the clamping driving member, a guide column is provided in the clamping fixed mold, a guide groove is provided in the clamping movable mold, the guide column is located in the guide groove, and a spring is embedded on the outside of the guide column.

[0025] A spring is embedded on the outside of the guide column of the present application, and the two ends of the spring are respectively abutted against the clamping fixed mold and the clamping movable mold. When the clamping fixed mold and the clamping movable mold need to be separated, the elastic force of the spring can separate the two quickly, further improving the efficiency of the die.

[0026] In a preferred technical solution of the utility model, weight-reducing notches are provided in the clamping fixed mold and the clamping movable mold.

[0027] The weight-reducing notch may be a notch arranged in the opposite direction of the clamping position. By arranging the weight-reducing notch, the weight of the entire clamping assembly can be reduced, thereby reducing the weight of the entire die device and reducing the device cost.

[0028] The beneficial effects of the utility model are:

[0029] The utility model provides a double-layer bell-mouth die device, comprising a clamping assembly, a flat-mouth die assembly and a bell-mouth die assembly, wherein the clamping assembly comprises a first clamping position and a second clamping position arranged in parallel for fixing a connecting pipe; the flat-mouth die assembly comprises a flat-mouth driving member and a flat-mouth die shaft, and the axis center line of the flat-mouth die shaft coincides with the axis center line of the first clamping position; the bell-mouth die assembly comprises a bell-mouth driving member and a bell-mouth die shaft, and the axis center line of the bell-mouth die shaft coincides with the axis center line of the second clamping position; the flat-mouth driving member drives the flat-mouth die shaft to move toward the first clamping position, performs a flat-mouth die on the connecting pipe in the first clamping position, so that the outer diameter of the end of the connecting pipe becomes smaller, forming an inward-retracted port; at this time, the outer diameter of the end of the connecting pipe is an arc-shaped structure, and the outer diameter of the inward-retracted port is smaller than the outer diameter of the original connecting pipe. The connecting tube that has passed through the flat-mouth die is then switched to the second clamping position, and the bell-mouth driving member drives the bell-mouth die axis to move toward the retracted port, and a second bell-mouth die is performed on the connecting tube in the second clamping position, so that the retracted port is folded into the interior of the connecting tube to form a double-layer bell-mouth structure. The double-layer bell-mouth has a greater thickness than the single-layer bell-mouth, which avoids the problems of cracking and curling that occur in the single-layer bell-mouth in the prior art, and improves the sealing performance of the connecting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an overall schematic diagram of the die device of this application;

[0031] Figure 2 A schematic diagram of one side of the die device of the present application;

[0032] Figure 3 A schematic diagram of another side of the die device of the present application;

[0033] Figure 4 It is a schematic diagram of the structure of the clamping assembly in this application;

[0034] Figure 5 It is a schematic diagram of the side structure of the clamping assembly in this application;

[0035] Figure 6 A top view of the flat die assembly and the bell-mouth die assembly of the present application;

[0036] Figure 7 It is a cross-sectional schematic diagram of the flat die shaft;

[0037] Figure 8 It is a cross-sectional schematic diagram of the bell-mouth punch die shaft;

[0038] Fig. 9 It is a schematic diagram of the structure of the connecting pipe after it passes through the flat die assembly.

[0039] Reference numerals:

[0040] 11. Flat-mouth drive member; 12. Flat-mouth die shaft; 13. Die groove; 14. Die protrusion; 21. Bell-mouth drive member; 22. Bell-mouth die shaft; 23. Die member; 24. Guide protrusion; 31. Clamping fixed die; 32. Clamping movable die; 33. Semicircular groove; 34. Guide column; 35. Spring; 36. Weight reduction notch; 37. Clamping drive member; 38. Positioning column; 41. Connecting pipe; 42. Retracted port. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0042] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0043] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0044] Example 1

[0045] like Figure 1-Figure 9 As shown, the present application provides a double-layer bell mouth die device, comprising:

[0046] The clamping assembly comprises a first clamping position and a second clamping position arranged in parallel for fixing the connecting pipe;

[0047] The flat die assembly comprises a flat die driving member 11 and a flat die shaft 12, wherein the axis of the flat die shaft 12 coincides with the axis of the first clamping position; the flat die driving member 11 can drive the flat die shaft 12 to move away from or towards the first clamping position;

[0048] The bell-mouth die assembly includes a bell-mouth drive 21 and a bell-mouth die shaft 22, wherein the axis line of the bell-mouth die shaft 22 coincides with the axis line of the second clamping position; the bell-mouth drive 21 can drive the bell-mouth die shaft 22 to move in a direction away from or close to the second clamping position; and the connecting pipe is subjected to a secondary die after being punched by the flat-mouth die shaft 12 to form a double-layer bell mouth.

[0049] The utility model provides a double-layer bell-mouth die device, comprising a clamping assembly, a flat-mouth die assembly and a bell-mouth die assembly, wherein the clamping assembly comprises a first clamping position and a second clamping position arranged in parallel for fixing a connecting tube 41; the flat-mouth die assembly comprises a flat-mouth drive member 11 and a flat-mouth die shaft 12, the axis of the flat-mouth die shaft 12 coincides with the axis of the first clamping position; the bell-mouth die assembly comprises a bell-mouth drive member 21 and a bell-mouth die shaft 22, the axis of the bell-mouth die shaft 22 coincides with the axis of the second clamping position; the flat-mouth drive member 11 drives the flat-mouth die shaft 12 to move toward the first clamping position, performs a flat-mouth die on the connecting tube 41 in the first clamping position, so that the outer diameter of the end of the connecting tube 41 becomes smaller, forming an inward-retracted port 42; at this time, the outer diameter of the end of the connecting tube 41 is an arc-shaped structure, and the outer diameter of the inward-retracted port 42 is smaller than the outer diameter of the original connecting tube 41. The connecting tube 41 that has passed through the flat-mouth die is then switched to the second clamping position, and the bell-mouth driving member 21 drives the bell-mouth die shaft 22 to move toward the retracted port 42, and performs a secondary bell-mouth die on the connecting tube 41 in the second clamping position, so that the retracted port 42 is folded into the interior of the connecting tube 41, forming a double-layer bell-mouth structure. The double-layer bell mouth has a larger thickness than the single-layer bell mouth, which avoids the problems of cracking and curling in the single-layer bell mouth in the prior art, and improves the sealing performance of the connecting tube 41.

[0050] In the present application, the connecting tube 41 may be a cylindrical connecting tube 41, which forms a retracted port 42 after passing through the flat die assembly. The retracted port 42 is an arc-shaped structure. The retracted port 42 refers to the portion of the end of the connecting tube 41 that is deformed after passing through the flat die assembly. From the undeformed connecting tube 41 to the retracted port 42, the outer diameter of the retracted port 42 first increases and then decreases, and finally the outer diameter of the retracted port 42 at the end away from the connecting tube 41 is smaller than the original outer diameter of the connecting tube 41. Only by reducing the outer diameter of the retracted port 42 can it be ensured that the retracted port 42 is folded into the inside of the connecting tube 41 during the next bell-mouth die punching to form a double-layer bell-mouth.

[0051] In the present application, the cross-section of the connecting tube 41 can also be a polygonal structure. The front section of the connecting tube 41 after passing through the flat-mouth die assembly has an outer diameter that first increases and then decreases, and the outer diameter of the end of the retracted port 42 away from the connecting tube 41 is smaller than the outer diameter of the original connecting tube 41.

[0052] In the present application, the flat die assembly can also be a clamping structure, which compresses and clamps the connecting tube 41 so that the retracted port 42 at the front end of the connecting tube 41 has a size smaller than the original outer diameter of the connecting tube 41.

[0053] In the present application, the flat-mouth driving member 11 may be a cylinder structure, which can drive the flat-mouth punching die shaft 12 to move toward or away from the connecting tube 41, wherein the connecting tube 41 is fixed, and the end of the connecting tube 41 is punched by the high-speed movement of the flat-mouth punching die shaft 12 to form the retracted port 42. The moving speed of the flat-mouth punching die shaft 12 can be determined according to the power and air pressure of the cylinder.

[0054] In the present application, the bell-mouth driving member 21 may be a cylinder structure, which can drive the bell-mouth die shaft 22 to move toward or away from the connecting tube 41, wherein the connecting tube 41 is fixed, and the retracted port 42 at the front end of the connecting tube 41 is punched by the high-speed movement of the bell-mouth die shaft, so that the retracted port 42 is folded into the inside of the connecting tube 41 to form a double-layer bell mouth. The moving speed of the bell-mouth die shaft 22 can be determined according to the power and air pressure of the cylinder.

[0055] Example 2

[0056] like Figure 1-Figure 9 As shown, the present application provides a double-layer bell mouth die device, comprising:

[0057] The clamping assembly comprises a first clamping position and a second clamping position arranged in parallel for fixing the connecting pipe;

[0058] The flat die assembly comprises a flat die driving member 11 and a flat die shaft 12, wherein the axis of the flat die shaft 12 coincides with the axis of the first clamping position; the flat die driving member 11 can drive the flat die shaft 12 to move away from or towards the first clamping position;

[0059] The bell mouth die assembly includes a bell mouth driving member 21 and a bell mouth die shaft 22, wherein the axis of the bell mouth die shaft 22 coincides with the axis of the second clamping position; the bell mouth driving member 21 can drive the bell mouth die shaft 22 to move away from or close to the second clamping position; the connecting pipe after being punched by the flat mouth die shaft 12 is punched twice to form a double-layer bell mouth. Specifically, as Figure 7As shown, in the present application, one end of the flat-mouth die shaft 12 is connected to the flat-mouth driving member 11, and the other end is provided with a die groove 13, in which a die protrusion 14 is provided, and the axial centerline of the die protrusion 14 coincides with the axial centerline of the die groove 13; the outer diameter of the die protrusion 14 is smaller than the inner diameter of the connecting tube 41, and the inner diameter of the die groove 13 is larger than the outer diameter of the connecting tube 41.

[0060] In the present application, the flat-mouth driving member 11 can be connected to the end or middle position of the flat-mouth die shaft 12, and the other end of the flat-mouth die shaft 12 is provided with a die groove 13 and a die protrusion 14 for the die. The shape of the die groove 13 is adapted to the connecting tube 41, and the inner diameter of the die groove 13 is larger than the outer diameter of the connecting tube 41, so as to ensure that when the die groove 13 abuts against the connecting tube 41, the end of the connecting tube 41 abuts against the bottom of the die groove 13, that is, the connecting tube 41 is completely wrapped in the die groove 13. The shape of the die protrusion 14 is adapted to the connecting tube 41, and the outer diameter of the die protrusion 14 is smaller than the inner diameter of the connecting tube 41. At the same time, the axis of the die protrusion 14 coincides with the axis of the die groove 13. When the die protrusion 14 abuts against the connecting tube 41, the connecting tube 41 is nested outside the die protrusion 14 and does not contact the die protrusion 14. In the present application, the flat-mouth driving member 11 drives the flat-mouth die shaft 12 to move at high speed toward the end of the connecting tube 41, so that the connecting tube 41 collides with the die groove 13. During the collision, the end of the connecting tube 41 is deformed to form a retracted port 42. From the undeformed connecting tube 41 to the retracted port 42, the outer diameter of the retracted port 42 first increases and then decreases, and finally the outer diameter of the retracted port 42 at the end away from the connecting tube 41 is smaller than the original outer diameter of the connecting tube 41.

[0061] The purpose of the flat-end die assembly is to deform the end of the connecting tube 41 to form an inwardly contracted port 42. The outer diameter of the inwardly contracted port 42 away from the end of the connecting tube 41 is smaller than the outer diameter of the connecting tube 41, so that the inwardly contracted port 42 can be folded into the interior of the connecting tube 41 during the subsequent bell-mouth die punching.

[0062] Furthermore, the structures of the die groove 13 and the die protrusion 14 in the present application need to be compatible with the shape of the connecting tube 41. When the connecting tube 41 is a cylindrical structure, the die groove 13 is a cylindrical groove, and the die protrusion 14 is a cylindrical structure.

[0063] When the flat die shaft 12 is driven by the flat drive member 11 to move at high speed toward the fixed connecting tube 41, the end of the connecting tube 41 is nested outside the die protrusion 14, and at the same time, the end collides with the bottom of the die groove 13 at high speed. Under the action of the collision, the end of the connecting tube 41 is deformed to form an inwardly contracted port 42, as shown in FIG. Fig. 9Similarly, when the cross section of the connecting tube 41 is another polygonal structure, the structures of the die groove 13 and the die protrusion 14 are also adapted to the connecting tube 41 .

[0064] For example, when the connecting tube 41 is a rectangular parallelepiped, the die groove 13 is a rectangular parallelepiped groove, and the die protrusion 14 is a rectangular parallelepiped protrusion. When the flat-mouth die shaft 12 is driven by the flat-mouth driving member 11 and moves at high speed toward the fixed connecting tube 41, the end of the connecting tube 41 is nested in the outside of the die protrusion 14, and at the same time, the end collides with the bottom of the die groove 13 at high speed. Under the action of the collision, the end of the connecting tube 41 is deformed to form an inward-retracted port 42.

[0065] The flat-mouth die assembly in the present application has a simple structure, and the die protrusion 14 plays a positioning and guiding role. Due to the existence of the die protrusion 14, when the end of the connecting tube 41 is deformed by force, outward stress is generated, so that the retracted port 42 forms an arc structure whose outer diameter first increases and then decreases, so that the outer diameter of the retracted port 42 away from the end of the connecting tube 41 is smaller than the outer diameter of the connecting tube 41, providing a basis for the bell-mouth die of the next process.

[0066] Example 3

[0067] like Figure 1-Figure 9 As shown, the present application provides a double-layer bell mouth die device, comprising:

[0068] The clamping assembly comprises a first clamping position and a second clamping position arranged in parallel for fixing the connecting pipe;

[0069] The flat die assembly comprises a flat die driving member 11 and a flat die shaft 12, wherein the axis of the flat die shaft 12 coincides with the axis of the first clamping position; the flat die driving member 11 can drive the flat die shaft 12 to move away from or towards the first clamping position;

[0070] The bell mouth die assembly includes a bell mouth driving member 21 and a bell mouth die shaft 22, wherein the axis of the bell mouth die shaft 22 coincides with the axis of the second clamping position; the bell mouth driving member 21 can drive the bell mouth die shaft 22 to move away from or close to the second clamping position; the connecting pipe after being punched by the flat mouth die shaft 12 is punched twice to form a double-layer bell mouth. Specifically, as Figure 8 As shown, one end of the bell-mouth die shaft 22 is connected to the bell-mouth drive member 21, and the other end is a truncated cone-shaped die member 23, the cross-sectional area of ​​the front end of the die member 23 is smaller than the cross-sectional area of ​​the rear end of the die member 23, and the outer diameter of the front end of the die member 23 is smaller than the inner diameter of the connecting tube 41; the front end of the die member 23 refers to the end of the die member 23 away from the bell-mouth die shaft 22.

[0071] In the present application, the bell-mouth driving member 21 can be connected to the end or middle position of the bell-mouth die shaft 22, and the other end of the bell-mouth die shaft 22 is provided with a die piece 23 for the die. The cross-sectional area of ​​the die piece 23 at one end away from the bell-mouth die shaft 22 is smaller than the cross-sectional area of ​​the die piece 23 at one end close to the bell-mouth die shaft 22, and the outer diameter of the die piece 23 at one end away from the bell-mouth die shaft 22 is smaller than the inner diameter of the retracted port 42 in the connecting tube 41. When the bell-mouth driving member 21 drives the bell-mouth die shaft 22 to move at high speed toward the retracted port 42 in the fixed connecting tube 41, the retracted port 42 collides with the die piece 23. Since the inner diameter of the retracted port 42 at the position where the retracted port 42 first abuts against the die piece 23 is smaller, under the action of the high-speed collision, the retracted port 42 is collided and folded into the inside of the connecting tube 41, forming a double-layer bell-mouth structure. Since the die piece 23 is a truncated cone structure, the retracted port 42 is folded into the connecting pipe 41 and then expanded again to form a bell-mouth structure that matches the shape of the die piece 23 .

[0072] The present application also needs to ensure that the axis of the die piece 23 coincides with the axis of the bell-mouth die shaft 22, and coincides with the axis of the retracted port 42 and the connecting tube 41. This ensures that when the connecting tube 41 abuts against the die piece 23, the centers of the two coincide, thereby forming a uniform bell-mouth shape.

[0073] In the present application, the die piece 23 is a truncated cone structure, and the retracted port 42 is folded into the interior of the connecting tube 41 during the collision of the die piece 23. At the same time, the front end section of the truncated cone die piece 23 is smaller than the inner diameter of the connecting tube 41, and the rear end section is larger than the inner diameter of the connecting tube 41. The front end refers to the end away from the bell-mouth die shaft 22. In this way, it can be ensured that the inner diameter of the bell mouth formed after the die is larger than the inner diameter of the original connecting tube 41, and it can be ensured that the bell mouth position is a double-layer structure. The double-layer structure refers to the original connecting tube 41 wall and the wall of the retracted port 42 folded into the interior of the connecting tube 41.

[0074] Furthermore, a guide protrusion 24 is provided on a side of the punch die 23 of the present application away from the bell-mouth punch die shaft 22 , and an outer diameter of the guide protrusion 24 is smaller than an inner diameter of the retracted port 42 in the connecting pipe 41 .

[0075] The axis of the guide protrusion 24 coincides with the axis of the die 23 and the axis of the connecting tube 41. When the connecting tube 41 collides with the die 23 at high speed, the guide protrusion 24 is wrapped inside the connecting tube 41 and plays a guiding role, which is similar to the role of the die protrusion 14 in Example 2.

[0076] Example 4

[0077] like Figure 1-Figure 9 As shown, the present application provides a double-layer bell mouth die device, comprising:

[0078] The clamping assembly includes a first clamping position and a second clamping position arranged in parallel for fixing the connecting pipe; Figure 1-Figure 6 As shown, the flat die assembly and the bell-mouth die assembly are arranged in parallel, and the clamping assembly includes a first clamping position and a second clamping position in parallel, and the two clamping positions correspond to the flat die assembly and the bell-mouth die assembly one by one.

[0079] The flat die assembly comprises a flat die driving member 11 and a flat die shaft 12, wherein the axis of the flat die shaft 12 coincides with the axis of the first clamping position; the flat die driving member 11 can drive the flat die shaft 12 to move away from or towards the first clamping position;

[0080] The bell-mouth die assembly includes a bell-mouth drive 21 and a bell-mouth die shaft 22, wherein the axis of the bell-mouth die shaft 22 coincides with the axis of the second clamping position; the bell-mouth drive 21 can drive the bell-mouth die shaft 22 to move in a direction away from or close to the second clamping position; the connecting pipe is subjected to a secondary die after being punched by the flat-mouth die shaft 12 to form a double-layer bell mouth. In the present application, the flat-mouth die shaft 12 and the bell-mouth die shaft 22 extend along a first direction, and the clamping assembly is located on a side of the flat-mouth die shaft 12 away from the flat-mouth drive 11; the connecting direction of the first clamping position and the second clamping position is the second direction, and the second direction is perpendicular to the first direction.

[0081] When the two die assemblies are arranged along the left and right directions of the horizontal direction, the clamping assembly is arranged on the side of the die shaft away from the driving member, and the clamping assembly is arranged front and back in the horizontal direction. This can ensure that the movement direction of the die shaft is the same during the two punchings. When the connecting tube switches between the first clamping position and the second clamping position, it is necessary to change the direction of the connecting tube by moving the position of the connecting tube.

[0082] Furthermore, the clamping assembly includes a clamping fixed mold 31 and a clamping movable mold 32, and semicircular grooves 33 are respectively provided in the clamping fixed mold 31 and the clamping movable mold 32. When the clamping movable mold 32 and the clamping fixed mold 31 are clamped, the two corresponding semicircular grooves 33 form a clamping position.

[0083] When the flat die assembly and the bell-mouth die assembly are arranged side by side in the horizontal direction, the clamping movable die 32 and the clamping fixed die 31 can be distributed up and down, wherein the clamping movable die 32 is connected to the clamping driving member 37, and the position of the clamping fixed die 31 is fixed. The clamping movable die 32 and the clamping fixed die 31 are both provided with grooves adapted to the shape of the connecting tube 41. When the connecting tube 41 is a cylindrical structure, the groove can be a semicircular groove 33. When the clamping movable die 32 and the clamping fixed die 31 are against the joint die, the two semicircular grooves 33 surround a cylindrical clamping position. When the clamping movable die 32 and the clamping fixed die 31 are separated, the two semicircular grooves 33 are away from each other, and the connecting tube 41 is no longer fixed. At this time, the connecting tube 41 is taken out and moved to the next processing station.

[0084] The clamping assembly in the present application adopts a structure in which a clamping movable die 32 and a clamping fixed die 31 cooperate with each other. The structure is simple and can realize quick clamping and loosening of the connecting tube 41, thereby improving the efficiency of the punching die.

[0085] Furthermore, the connection direction of the clamping fixed mold 31 and the clamping movable mold 32 is a third direction, and the third direction is perpendicular to the first direction and the second direction at the same time.

[0086] By setting up a flat-mouth die shaft 12 and a bell-mouth die shaft 22 that can move left and right, a first clamping position and a second clamping position set front and back, and a clamping movable die 32 and a clamping fixed die 31 set up upper and lower, smooth switching of the two dies can be achieved, and the floor space of the die device is saved.

[0087] Furthermore, the clamping movable mold 32 is connected to the clamping driving member 37, the clamping fixed mold 31 is provided with a guide column 34, the clamping movable mold 32 is provided with a guide groove, the guide column 34 is located in the guide groove, and a spring 35 is embedded outside the guide column 34.

[0088] The cooperation of the guide column 34 and the guide groove in the present application can ensure the accuracy of the clamping and separation of the movable mold 32 and the fixed mold 31, and avoid inaccurate positioning between the movable mold 32 and the fixed mold 31, which causes the connecting tube 41 to deviate from the axial line of the flat-mouth die shaft 12 or the bell-mouth die shaft 22. A slight deviation of the axial line will cause the die to be uneven and affect the connection sealing.

[0089] A spring 35 is embedded on the outside of the guide column 34 of the present application, and the two ends of the spring 35 are respectively abutted against the clamping fixed mold 31 and the clamping movable mold 32. When the clamping fixed mold 31 and the clamping movable mold 32 need to be separated, the elastic force of the spring 35 can quickly separate the two, further improving the punching efficiency.

[0090] In addition to the guide column 34, the present application can also set a positioning column 38 on the side of the guide column 34. There is no need to nest the spring 35 on the outside of the positioning column 38. The positioning column 38 is used to play a positioning role when installing the clamping fixed mold 31 and the clamping movable mold 32. After the installation of the clamping fixed mold 31 and the clamping movable mold 32 is completed, the cycle of mold closing and separation is realized under the joint action of the spring 35 and the clamping drive 37.

[0091] The clamping fixed die 31 and the clamping movable die 32 described in the present application are provided with a weight-reducing notch 36. The weight-reducing notch 36 can be a notch provided in the opposite direction of the clamping position. By providing the weight-reducing notch 36, the weight of the entire clamping assembly can be reduced, thereby reducing the weight of the entire die device and reducing the device cost.

[0092] The present application uses a plurality of side panels to enclose a rectangular space, a flat die assembly and a bell-mouth die assembly are arranged side by side in the rectangular space, a flat driving member 11 and a bell-mouth driving member 21 are arranged outside the rectangular space, a clamping assembly is arranged at one end of the flat die shaft 12 and the bell-mouth die shaft 22 away from the driving member, a clamping fixed die 31 and a clamping movable die 32 are arranged up and down in the clamping assembly, the clamping movable die 32 is connected to the clamping driving member 37, and the clamping driving member 37 is located outside the rectangular space. Figure 1 As shown, the clamping drive member 37 and the flat-mouth drive member 11 are located on the outside of different side plates, and the flat-mouth drive member 11 and the bell-mouth drive member 21 are located on the outside of the same side plate.

[0093] The flat-mouth driving member 11 of the utility model drives the flat-mouth punching die shaft 12 to move toward the first clamping position, performs flat-mouth punching on the connecting tube 41 in the first clamping position, so that the outer diameter of the end of the connecting tube 41 becomes smaller, forming an inward contraction port 42; at this time, the outer diameter of the end of the connecting tube 41 is an arc-shaped structure, and the outer diameter of the inward contraction port 42 is smaller than the outer diameter of the original connecting tube 41. Then, the connecting tube 41 after the flat-mouth punching is switched to the second clamping position, and the bell-mouth driving member 21 drives the bell-mouth punching die shaft 22 to move toward the inward contraction port 42, performs a secondary bell-mouth punching on the connecting tube 41 in the second clamping position, so that the inward contraction port 42 is folded into the inside of the connecting tube 41, forming a double-layer bell-mouth structure. The double-layer bell-mouth has a larger thickness than the single-layer bell-mouth, avoiding the problems of cracking and curling in the single-layer bell-mouth in the prior art, and improving the sealing performance of the connecting tube 41.

[0094] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings. In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0095] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0096] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0097] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double-layer bell mouth die device, characterized in that: include: The clamping assembly comprises a first clamping position and a second clamping position arranged in parallel for fixing the connecting pipe; A flat die assembly comprises a flat die driving member (11) and a flat die shaft (12), wherein the axis of the flat die shaft (12) coincides with the axis of the first clamping position; the flat die driving member (11) can drive the flat die shaft (12) to move in a direction away from or towards the first clamping position; The bell-mouth die assembly comprises a bell-mouth driving member (21) and a bell-mouth die shaft (22), wherein the axis center line of the bell-mouth die shaft (22) coincides with the axis center line of the second clamping position; the bell-mouth driving member (21) can drive the bell-mouth die shaft (22) to move in a direction away from or close to the second clamping position; and a second die is performed on the connecting pipe after being punched by the flat-mouth die shaft (12) to form a double-layer bell mouth.

2. A double-layer bell mouth die device according to claim 1, characterized in that: One end of the flat die shaft (12) is connected to the flat drive member (11), and the other end is provided with a die groove (13), a die protrusion (14) is provided in the die groove (13), and the axis center line of the die protrusion (14) coincides with the axis center line of the die groove (13); the outer diameter of the die protrusion (14) is smaller than the inner diameter of the connecting tube (41), and the inner diameter of the die groove (13) is larger than the outer diameter of the connecting tube (41).

3. A double-layer bell mouth die device according to claim 2, characterized in that: The connecting pipe (41) is a cylindrical structure, the punching die groove (13) is a cylindrical groove, and the punching die protrusion (14) is a cylindrical structure.

4. A double-layer bell mouth die device according to claim 1, characterized in that: One end of the bell-mouth die shaft (22) is connected to the bell-mouth driving member (21), and the other end is a truncated cone-shaped die member (23); the cross-sectional area of ​​the front end of the die member (23) is smaller than the cross-sectional area of ​​the rear end of the die member (23), and the outer diameter of the front end of the die member (23) is smaller than the inner diameter of the connecting pipe (41); the front end of the die member (23) refers to the end of the die member (23) away from the bell-mouth die shaft (22).

5. A double-layer bell mouth die device according to claim 4, characterized in that: A guide protrusion (24) is provided on one side of the punching die (23) away from the bell-mouth punching die shaft (22), wherein the outer diameter of the guide protrusion (24) is smaller than the inner diameter of the retracted port (42) in the connecting pipe (41), and the retracted port (42) refers to the end of the connecting pipe after being punched by the flat-mouth punching die assembly.

6. A double-layer bell mouth die device according to claim 1, characterized in that: The flat die shaft (12) and the bell-mouth die shaft (22) extend along a first direction, and the clamping assembly is located on a side of the flat die shaft (12) away from the flat drive member (11); the connecting direction of the first clamping position and the second clamping position is a second direction, and the second direction is perpendicular to the first direction.

7. A double-layer bell mouth die device according to claim 6, characterized in that: The clamping assembly comprises a clamping fixed mold (31) and a clamping movable mold (32), wherein the clamping fixed mold (31) and the clamping movable mold (32) are respectively provided with semicircular grooves (33), and when the clamping movable mold (32) and the clamping fixed mold (31) are closed, two corresponding semicircular grooves (33) form a clamping position.

8. A double-layer bell mouth die device according to claim 7, characterized in that: The connecting direction of the clamping fixed mold (31) and the clamping movable mold (32) is a third direction, and the third direction is perpendicular to both the first direction and the second direction.

9. A double-layer bell mouth die device according to claim 8, characterized in that: The clamping movable mold (32) is connected to the clamping driving member (37), the clamping fixed mold (31) is provided with a guide column (34), the clamping movable mold (32) is provided with a guide groove, the guide column (34) is located in the guide groove, and a spring (35) is embedded outside the guide column (34).

10. A double-layer bell mouth die device according to claim 8, characterized in that: The clamping fixed mold (31) and the clamping movable mold (32) are provided with weight-reducing notches (36).

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