A clamping die fixing structure for a J-shaped tube

Abstract

The present invention discloses a clamping die fixing structure for a J-shaped tube. The J-shaped tube includes a straight tube section and a curved hook section. The clamping die fixing structure includes a first clamping module, a second clamping module located to the right of the first clamping module, and a clamping die driver capable of driving the relative movement of the first and second clamping modules. A clamping tube shaping structure capable of clamping the J-shaped tube and maintaining the J-shaped tube in a fixed shape is provided between the first clamping module and the second clamping module. The first clamping module and / or the second clamping module are provided with an escape notch through which a punching needle can move. When the J-shaped tube is clamped between the first clamping module and the second clamping module, the inner curved side of the free end of the curved hook section is exposed in the escape notch. The present invention can shape the J-shaped tube and improve the dimensional accuracy of the J-shaped tube. The reserved escape notch allows an external punching needle to extend into the notch and punch a hole in the J-shaped tube, which is conducive to simultaneously punching the J-shaped tube while clamping and shaping it.

Description

Technical Field

[0001] The invention relates to the technical field of production of raw materials for heat exchangers, and in particular to a clamping die fixing structure for a J-shaped tube. Background Art

[0002] As a compact heat exchanger, tube-fin heat exchanger is widely used in the refrigeration industry. Its main raw materials are copper tubes and fins.

[0003] In some special tube-fin heat exchangers, it is necessary to use Figure 1 The J-shaped tube 1 shown comprises a straight tube section 11 and a curved hook section 12, with a tube hole 101 defined on the inner curved side of the free end of the curved hook section 12. Currently, the method for producing such a J-shaped tube 1 is to first cut a straight tube of an appropriate length, then bend the straight tube against a bending film to form the J-shaped tube. Next, the ends of the J-shaped tube are shaped, and finally, a hole is punched in the J-shaped tube to form the J-shaped tube 1 with the tube hole 101.

[0004] This production method also has the following problems. Since the copper tube itself has a certain elasticity, there will be a certain amount of rebound deformation after the J-tube is bent into shape. In order to solve this problem, there is a common practice: when bending the J-tube, the bending angle is increased to reserve a margin for rebound deformation. However, since the rebound deformation of different J-tubes is different, the dimensional deviation of the J-tube is large and the yield rate is low. If the dimensional deviation of the J-tube is too large, it will have an adverse effect on the subsequent punching accuracy. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a clamping die fixing structure that can clamp and press a bent J-shaped tube to improve the dimensional accuracy of the J-shaped tube.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A clamping die fixing structure for a J-shaped tube, wherein the J-shaped tube includes a straight tube section and a curved hook section. The clamping die fixing structure includes a first clamping module, a second clamping module located on the right side of the first clamping module, and a clamping die driver capable of driving the relative movement of the two. A guide structure is provided between the first clamping module and the second clamping module. A tube shaping structure capable of clamping the J-shaped tube and maintaining the J-shaped tube in a fixed shape is provided between the first clamping module and the second clamping module. An avoidance gap is provided on the first clamping module and / or the second clamping module for a punching needle to move therein. When the J-shaped tube is clamped between the first clamping module and the second clamping module, the inner curved side of the free end of the curved hook section is exposed in the avoidance gap.

[0008] In a preferred embodiment of the present invention, the tube clamping shaping structure includes a J-shaped first clamping groove arranged on the right side wall of the first clamping module, and a J-shaped second clamping groove arranged on the left side wall of the second clamping module. When the first clamping module and the second clamping module are closed, a J-shaped hole for clamping and accommodating the J-shaped tube is formed between the first clamping groove and the second clamping groove.

[0009] In a preferred embodiment of the present invention, the first clamping module is provided with an air guide hole communicating with the first clamping groove.

[0010] In a preferred embodiment of the present invention, the second clamping module is provided with an air guide hole communicating with the second clamping groove.

[0011] In a preferred embodiment of the present invention, the opening of the avoidance gap faces downward, and the J-shaped hole includes a straight hole section for clamping and accommodating the straight tube section of the J-shaped tube and a curved hole section for clamping and accommodating the hook section of the J-shaped tube, and the inwardly curved portion of the curved hole section at one end away from the straight hole section coincides with the avoidance gap.

[0012] In a preferred embodiment of the present invention, both ends of the J-shaped hole are open downward, and a guide hole that can guide left and right is provided on the first clamping module, and the guide hole is located in the area surrounded by the first clamping groove. A receiving member is movably provided in the guide hole, and the top contour of the receiving member is parallel to the hook part of the first clamping groove, and the front side contour of the receiving member is parallel to the straight part of the first clamping groove. When the first clamping module and the second clamping module are opened, a vertical gap is formed between the first clamping module and the second clamping module for the J-shaped tube to enter, and the receiving member is connected to a receiving device driver that can drive it to move into the vertical gap to receive the J-shaped tube.

[0013] In a preferred embodiment of the present invention, the guide structure includes a guide hole provided on the second clamping module along the left-right direction, and a guide rod provided on the first clamping module and slidingly engaged with the guide hole.

[0014] The present invention has the beneficial effects of shaping a J-shaped tube and improving the dimensional accuracy of the J-shaped tube. Furthermore, the reserved clearance notch allows an external punching needle to penetrate and punch a hole in the J-shaped tube, facilitating simultaneous punching of the J-shaped tube while clamping and shaping it, thereby facilitating automated processing and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the finished J-tube;

[0016] Figure 2 This is a schematic diagram of the positional relationship between the two components before the J-tube enters the clamping assembly;

[0017] Figure 3 It is a schematic diagram of the structure when the J-tube falls onto the receiving piece;

[0018] Figure 4 It is a schematic diagram of the structure of the clamping die assembly in the closed state;

[0019] Figure 5 It is an exploded view of the clamping die assembly;

[0020] Figure 6 This is a schematic structural diagram of the present invention when used in conjunction with a punching device;

[0021] Figure 7 yes Figure 6 Enlarged view of part A. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Reference Figures 1 to 7The present invention proposes a clamping mold fixing structure for a J-shaped tube, wherein the J-shaped tube 1 includes a straight tube section 11 and a hook section 12, and is characterized in that the clamping mold fixing structure includes a first clamping module 21, a second clamping module 22 located on the right side of the first clamping module 21, and a clamping mold driver capable of driving the relative movement of the two. A clamping tube shaping structure capable of clamping the J-shaped tube 1 and maintaining the J-shaped tube 1 in a fixed shape is provided between the first clamping module 21 and the second clamping module 22. An avoidance notch 201 is provided on the first clamping module 21, or an avoidance notch 201 is provided on the second clamping module 22, or both the first clamping module 21 and the second clamping module 22 are provided with avoidance notches 201. When the J-shaped tube is clamped between the first clamping module 21 and the second clamping module, the inner curved side of the free end of the hook section 12 is exposed in the avoidance notch 201.

[0027] Preferably, both the first clamping module 21 and the second clamping module 22 are provided with an avoidance notch 201 . When the first clamping module 21 and the second clamping module 22 are brought close together, the two avoidance notches 201 together form an avoidance groove in which the punching needle can move.

[0028] The clamping die driver is preferably an electric push rod or a combination of a motor screw-nut pair, which can be connected to the first clamping module 21 to drive the first clamping module 21 to move left and right relative to the second clamping module 22, or connected to the second clamping module 22 to drive the second clamping module 22 to move left and right relative to the first clamping module 21, and can also be connected to two clamping modules at the same time to drive the first clamping module 21 and the second clamping module 22 to move synchronously in opposite directions to close or open the two.

[0029] Specifically, the tube-clamping shaping structure includes a J-shaped first clamping groove 211 provided on the right side wall of the first clamping module 21, and a J-shaped second clamping groove 221 provided on the left side wall of the second clamping module 22. When the first clamping module 21 and the second clamping module 22 are closed, a J-shaped hole 202 for clamping and receiving the J-shaped tube 1 is formed between the first clamping groove 211 and the second clamping groove 221. The opening of the avoidance notch 201 faces downward, and both ends of the opening of the J-shaped hole 202 face downward. The J-shaped hole 202 includes a straight hole section for clamping and receiving the straight tube section 11 of the J-shaped tube 1, and a curved hole section for clamping and receiving the hook section 12 of the J-shaped tube 1. The inwardly curved portion of the curved hole section at one end away from the straight hole section coincides with the avoidance notch 201.

[0030] Reference Figures 3 to 5The first clamping module 21 is provided with a guide hole 212 that allows for left and right guidance. The guide hole 212 is located in the area surrounded by the first clamping groove 211. A receiving member 23 is movably mounted within the guide hole 212. The top profile of the receiving member 23 is parallel to the hook portion of the first clamping groove 211, and the front profile of the receiving member 23 is parallel to the straight portion of the first clamping groove 211. The receiving member 23 is connected to a connecting rod actuator 24. When the first clamping module 21 and the second clamping module 22 are opened, the connecting rod actuator 24 can drive the connecting rod 24 to move into the vertical gap 204 between the first clamping module 21 and the second clamping module 22 to receive the J-shaped tube 1. The connecting rod actuator 24 is preferably a pneumatic cylinder. The method of loading the J-tube 1 into the clamping mold assembly 2 is: use a robot to grab the J-tube 1 that has been bent and formed, so that the openings at both ends of the J-tube 1 are facing downward, and at the same time, the first clamping module 21 and the second clamping module 22 are opened, and the receiving part 23 moves to the vertical gap 204 between the first clamping module 21 and the second clamping module 22, then, the robot grabs the J-tube 1 and moves it to the top of the vertical gap 204, and then the robot is released, allowing the J-tube 1 to fall freely onto the receiving part 23, and the J-tube 1 is preliminarily positioned by the receiving part 23, finally, the second clamping module 22 and the second clamping module 22 are closed, and at the same time, the receiving part 23 is recovered into the guide hole 212, and the J-tube 1 is clamped and fixed by the first clamping groove 211 and the second clamping groove 221.

[0031] In order to improve the smoothness of the opening and closing of the clamping mold 2 , the second clamping module 22 is provided with a guide hole 222 arranged along the left and right directions, and the first clamping module 21 is provided with a guide rod 213 that slides with the guide hole 222 .

[0032] In some embodiments of the present invention, other structural forms may be adopted. For example, a plurality of discontinuous clamping grooves may be used to clamp different positions of the J-shaped tube 1 , thereby replacing the first clamping groove 211 and the second clamping groove 221 .

[0033] Reference Figure 6 and Figure 7 The punching device used in conjunction with the present invention adopts the following structure, including a punching needle 4, an ejector pin 3, a fixed base 51, a lifting base 52, a lifting driver 53 disposed on the fixed base 51 and capable of driving the lifting base 52 to move up and down, a punching bracket 54 capable of moving back and forth on the lifting base 52, and a punching driver 55 disposed on the lifting base 52 and capable of driving the punching bracket 54 to move back and forth. The punching needle 4 is disposed at the upper end of the punching bracket 54 with the head of the punching needle 4 facing backward, and the ejector pin 3 is disposed on the lifting base 52. The lifting driver 53 is preferably a motor, which drives the lifting base 52 to move up and down through a screw-nut pair. The punching driver 55 is preferably a cylinder.

[0034] The present invention utilizes a punching device to punch holes in a J-shaped tube. When the J-shaped tube 1 is clamped and received in the clamping die 2, the lifting actuator 53 drives the lifting seat 52 upward, causing the punching needle 4 to extend upward into the clearance notch 201 and simultaneously inserting the ejector pin 3 upward into the interior of the hook section 12 of the J-shaped tube 1. Subsequently, the lifting seat 52 remains stationary, and the punching actuator 55 drives the punching bracket 54 and the punching needle 4 backward within the clearance notch 201, thereby punching the hole 101 in the hook section 12 of the J-shaped tube 1. The ejector pin 3 is also positioned on the lifting seat 52 to ensure that the ejector pin 3 is inserted into the hook section 12 before the punching needle 4 punches the hole. After the hole is punched, the openings at both ends of the J-shaped tube 1 face downward, allowing the waste material generated by the punching to automatically drain downward under the action of gravity.

[0035] The present invention adopts the above-mentioned solution, and can receive the J-shaped tube formed by bending, reshape the J-shaped tube 1, and improve the dimensional accuracy of the J-shaped tube 1. In addition, the reserved avoidance gap 201 allows the external punching needle 4 to extend into it and punch a hole in the J-shaped tube, which is conducive to punching the J-shaped tube 1 while clamping and shaping the J-shaped tube 1, facilitating automated processing and improving work efficiency.

[0036] Furthermore, the first clamping module 21 is provided with an air guide hole 203 that is in communication with the first clamping groove 211, and the second clamping module 22 is provided with an air guide hole 203 that is in communication with the second clamping groove 221. One end of the air guide hole 203 is connected to an external high-pressure air source through an air pipe, and the air pipe is provided with a solenoid valve. After the J-shaped tube 1 is punched, the punching needle 4 is withdrawn, and then the first clamping module 21 and the second clamping module 22 are separated, and a certain space is opened between them to form a vertical gap 204 for the J-shaped tube 1 to pass through. Then, the solenoid valve on the air pipe is opened, and air is injected into the first clamping groove 211 and the second clamping groove 221, so that the J-shaped tube 1 can be smoothly detached and fall through the vertical gap 204 between the first clamping module 21 and the second clamping module 22, realizing automatic unloading.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A clamping mold fixing structure for a J-shaped tube, wherein the J-shaped tube (1) comprises a straight tube section (11) and a hook section (12), characterized in that: The clamping die fixing structure comprises a first clamping module (21), a second clamping module (22) located on the right side of the first clamping module (21), and a clamping die driver capable of driving the relative movement of the first clamping module (21) and the second clamping module (22); a guide structure is provided between the first clamping module (21) and the second clamping module (22); a tube shaping structure capable of clamping the J-shaped tube (1) and keeping the J-shaped tube (1) in a fixed shape is provided between the first clamping module (21) and the second clamping module (22); an avoidance notch (201) for the punching needle to move therein is provided on the first clamping module (21) and / or the second clamping module (22); when the J-shaped tube is clamped between the first clamping module (21) and the second clamping module, the inner curved side of the free end of the hook section (12) is exposed in the avoidance notch (201); The tube-clamping shaping structure comprises a J-shaped first clamping groove (211) provided on the right side wall of the first clamping module (21), and a J-shaped second clamping groove (221) provided on the left side wall of the second clamping module (22); when the first clamping module (21) and the second clamping module (22) are closed, a J-shaped hole (202) for clamping and accommodating the J-shaped tube (1) is formed between the first clamping groove (211) and the second clamping groove (221); Both ends of the J-shaped hole (202) are open downwards, and a guide hole (212) capable of guiding left and right is provided on the first clamping module (21), and the guide hole (212) is located in the area surrounded by the first clamping groove (211). A receiving member (23) is movably provided in the guide hole (212), and the top profile of the receiving member (23) is parallel to the hook portion of the first clamping groove (211), and the front side profile of the receiving member (23) is parallel to the straight portion of the first clamping groove (211). When the first clamping module (21) and the second clamping module (22) are opened, a vertical gap (204) is formed between the first clamping module (21) and the second clamping module (22) into which the J-shaped tube (1) can enter, and the receiving member (23) is connected to a receiving driver (24) capable of driving it to move into the vertical gap (204) to receive the J-shaped tube (1); The guide structure comprises a guide hole (222) provided on the second clamping module (22) along the left-right direction, and a guide rod (213) provided on the first clamping module (21) and slidingly engaged with the guide hole (222).

2. A J-shaped tube clamping mold fixing structure according to claim 1, characterized in that: The first clamping module (21) is provided with an air guide hole (203) in communication with the first clamping groove (211).

3. A J-shaped tube clamping and fixing structure according to claim 1 or 2, characterized in that: The second clamping module (22) is provided with an air guide hole (203) in communication with the second clamping groove (221).

4. The J-shaped tube clamping mold fixing structure according to claim 1, characterized in that: The opening of the avoidance notch (201) faces downward, and the J-shaped hole (202) includes a straight hole section for clamping and receiving the straight tube section (11) of the J-shaped tube (1) and a curved hole section for clamping and receiving the hook section (12) of the J-shaped tube (1), and an inwardly curved portion of one end of the curved hole section away from the straight hole section coincides with the avoidance notch (201).

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