Hot riveting column structure and hot riveting tool

Abstract

The utility model discloses hot riveting column structure and hot riveting frock, hot riveting column structure includes sleeve bucket, hot riveting column body, elastic unit and blow pipe, the sleeve bucket is arranged hot riveting column body coaxially in, and is arranged elastic unit between each other, the cooling hole is seted up in the sleeve bucket barrel wall bottom, and the blow pipe is seted up in the sleeve bucket outer barrel wall, and the blow pipe gas outlet passes through the cooling hole, and is aligned with the sleeve bucket bottom. The utility model has the beneficial effects that through set up sleeve bucket, hot riveting column body and spring, make when hot riveting, the heat is with sleeve bucket fast transmission to the place of waiting hot riveting, and after hot riveting, sleeve bucket and hot riveting column body are fast again separate, at this moment, under the action of elastic unit, sleeve bucket and the place of waiting hot riveting keep the contact, and hot riveting column body is far away, and again cooperate blow pipe and connect cold gas, which means that cold gas can directly cool the place of waiting hot riveting, and does not influence the heat of hot riveting column body.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, and in particular to a hot riveting column structure and hot riveting tooling. Background Technology

[0002] The thermoforming bracket hot riveting is a technology that combines thermoforming and hot riveting processes. It is mainly used to connect the thermoforming bracket in the battery module to other components (such as signal acquisition components, aluminum foil, etc.). The hot riveting protrusions are heated to a softened or melted state by hot riveting pins, and pressure is applied to make them tightly connected.

[0003] In traditional hot riveting processes, there is a significant technical bottleneck: after riveting, the workpiece needs to be cooled naturally to set its shape. This process is time-consuming, with single-point cooling typically taking 15 to 30 seconds, which severely restricts production cycle time and efficiency improvement. In existing processes, cold air is used to quickly cool the workpiece, but this obviously also affects the heating performance of the hot riveting post.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to solve the problem of long cooling time for hot riveting without affecting the heating of the hot riveting column.

[0006] This utility model solves the above-mentioned technical problems through the following technical means: This utility model claims to protect the hot riveting column structure, including a sleeve, a hot riveting column body, an elastic unit and an air blowing pipe; the hot riveting column bodies are coaxially arranged inside the sleeve, and elastic units are set between them; a cooling hole is opened at the bottom of the sleeve wall, and an air blowing pipe is set on the outer wall of the sleeve, with the air outlet of the air blowing pipe passing through the cooling hole and aligned with the bottom of the sleeve.

[0007] This invention utilizes a sleeve, a hot-riveting column body, and a spring to rapidly transfer heat to the riveting area during hot riveting. After riveting, the sleeve and the hot-riveting column body quickly separate. At this point, the elastic unit keeps the sleeve in contact with the riveting area while the hot-riveting column body moves away. Combined with a cooling air supply via an air pipe, this means the cooling air can directly cool the riveting area without affecting the heat of the hot-riveting column body. Therefore, after cooling, the riveting area can quickly set, avoiding the problem of PVC stringing caused by the lifting process of traditional hot-riveting columns, which results in poor appearance. The entire hot-riveting column structure is compact, greatly improving the quality of hot riveting.

[0008] Preferably, an airflow channel is opened on the bottom side of the air blowing pipe facing the sleeve, and the airflow channel constitutes the air outlet of the air blowing pipe.

[0009] The airflow channel faces the sleeve, so that the path of the cold air connecting the airflow channel points towards the sleeve.

[0010] Preferably, the centerline of the airflow channel forms an angle α with the axis of the sleeve, wherein 15°≤α≤45°.

[0011] The centerline of the airflow channel is further defined to form an angle with the axis of the hot riveting column sleeve, so that the cold air can be directly aimed at the bottom of the sleeve, that is, the part to be hot riveted, to cool it down, making the shaping effect easier to control.

[0012] Preferably, a first limiting block is provided radially at the opening of the sleeve barrel, and the first limiting block and the opening of the sleeve barrel form a fan-shaped groove structure.

[0013] Preferably, the hot-riveted column body has a second limiting block protruding radially, and the transverse cross section of the second limiting block is a sector block structure that is adapted to or smaller than the sector groove.

[0014] The second limiting block is inserted into the sleeve cavity from the gap, and then the hot riveting column body is rotated so that the second limiting block and the gap are offset from each other, and the second limiting block and the first limiting block abut against each other to prevent the hot riveting column body from sliding out of the sleeve cavity.

[0015] Preferably, the hot riveting column body located inside the barrel cavity is fitted with an elastic unit, one end of which abuts against the inner wall of the bottom of the hot riveting column sleeve, and the other end abuts against the bottom of the second limiting block.

[0016] Preferably, the elastic element is a spring.

[0017] A spring is used to provide elastic force and is in a state of slight compression or extension under normal conditions.

[0018] Preferably, the cooling holes are semi-circular in shape.

[0019] The cooling holes are not limited to semi-circular holes; they can also be square or irregularly shaped. However, it is necessary to ensure that a circumferential distance is reserved between adjacent cooling holes to prevent the bottom of the hot riveting column sleeve from separating from the sleeve wall.

[0020] Preferably, the diameter of the cooling holes gradually decreases as they face inwards from the inside of the sleeve.

[0021] It guides the cold air, directing it into the barrel cavity through the cooling holes.

[0022] This utility model also claims protection for a hot riveting fixture, including a hot riveting column structure and a vacuum forming bracket, wherein the vacuum forming bracket is provided with several hot riveting protrusions, and the hot riveting column sleeve is directly above it.

[0023] This utility model's hot riveting fixture, firstly, by setting up a hot riveting post sleeve, a hot riveting post body, and a spring, allows heat to be quickly transferred to the hot riveting protrusion via the hot riveting post sleeve during hot riveting. After hot riveting, the hot riveting post sleeve and the hot riveting post body quickly separate. At this point, under the action of the spring, the hot riveting post sleeve remains in contact with the hot riveting protrusion, while the hot riveting post body moves away. Combined with the air blowing pipe connecting to cold air, this means that the cold air can directly cool the hot riveting protrusion without affecting the heat of the hot riveting post body. Therefore, after cooling, the hot riveting protrusion can quickly set, avoiding the problem of PVC stripping caused by the lifting process of traditional hot riveting posts, which leads to poor appearance. The entire hot riveting post structure is compact, greatly improving the quality of hot riveting.

[0024] Secondly, the center line of the airflow channel is further defined to form an angle α with the axis of the hot riveting column head, so that the cold air can be directly aimed at the bottom of the hot riveting column head barrel, that is, the hot riveting protrusion, to cool it down, making the shaping effect easier to control. Attached Figure Description

[0025] Figure 1 This is a front view of the hot riveting column structure in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the hot riveting column structure in Embodiment 1 of this utility model, showing the spring in its normal state. Figure 3 This is a schematic diagram of the hot riveting column structure in Embodiment 1 of this utility model, showing the spring in full compression. Figure 4 This is a cross-sectional view of the hot riveting column sleeve in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the transverse cross-section of the hot riveting column body in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the hot riveting fixture in Embodiment 2 of this utility model; 10. Hot riveting post sleeve; 10a. Cooling hole; 11. First limiting block; 11a. Spacing; 12. Hot riveting post body; 13. Second limiting block; 14. Spring; 15. Air blowing pipe; 15a. Airflow channel; 2. Vacuum-formed bracket; 20. Hot-riveted protrusions. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1 See Figures 1-5 This embodiment requires protection of the hot riveting column structure, including the hot riveting column sleeve 10, the first limiting block 11, the hot riveting column body 12, the second limiting block 13, the spring 14, and the air blowing pipe 15; The hot riveting post head 10 has a barrel-shaped structure and is made of copper or steel to facilitate heat conduction. Two first limiting blocks 11 are provided at the opening of the barrel of the hot riveting post head 10. The first limiting blocks 11 are in the shape of circular petals. The two first limiting blocks 11 are symmetrically arranged along the axis of the hot riveting post head 10 and are reserved with a gap 11a between them. Four cooling holes 10a penetrate the bottom side of the barrel wall of the hot riveting post head 10. The cooling holes 10a have a semi-circular hole structure and face the inside of the riveting post head. The hole diameter gradually decreases.

[0028] The spacer 11a and the opening of the hot riveting column sleeve 10 form a fan-shaped groove structure. The cooling hole 10a is not limited to a semi-circular hole structure, but can also be a square hole or an irregular hole. However, it is necessary to ensure that a circumferential distance is reserved between adjacent cooling holes 10a to prevent the bottom of the hot riveting column sleeve 10 from separating from the wall of the hot riveting column sleeve 10.

[0029] The hot riveting column body 12 is coaxially arranged inside the cavity of the hot riveting column sleeve 10. The hot riveting column body 12 is hollow inside. The hot riveting column body 12 refers to the columnar riveting element used to connect two or more parts after being softened or melted by heating in the hot riveting process. This is the existing technology. It is preferably made of copper with a thermal conductivity ≥380W / m·K. The hot riveting column body 12 itself has a heating wire for heating.

[0030] The hot riveting column body 12 is provided with two second limiting blocks 13. The second limiting blocks 13 are symmetrically arranged along the axis of the hot riveting column body 12. The transverse cross section of the second limiting block 13 is a fan-shaped block structure that is adapted to or smaller than the size of the interval 11a. This facilitates the second limiting block 13 being inserted into the cavity of the hot riveting column sleeve 10 from the interval 11a. Then, the hot riveting column body 12 is rotated so that the second limiting block 13 and the interval 11a are offset from each other. The second limiting block 13 and the first limiting block 11 abut against each other to prevent the hot riveting column body 12 from sliding out of the cavity of the hot riveting column sleeve 10.

[0031] A spring 14 is fitted on the hot riveting column body 12 located inside the hot riveting column sleeve 10. Under normal conditions, the spring 14 is in a slightly compressed or extended state. One end of the spring 14 is in contact with the inner wall of the bottom of the hot riveting column sleeve 10, and the other end is in contact with the bottom of the second limiting block 13.

[0032] Four air blowing pipes 15 are provided at the bottom of the outer barrel wall of the hot riveting column sleeve 10. The air blowing pipes 15 are arranged in a ring array along the axis of the hot riveting column sleeve 10. The top of the air blowing pipes 15 are connected to the cold air pipe (not shown in the figure). The cold air pipe refers to the pipe used to provide cold air, including but not limited to the pipe used to transport refrigerant or cold air in air conditioning or refrigeration systems. This is the prior art. Moreover, it is preferred that the cold air pipe is equipped with a valve (not shown in the figure) for opening and closing the supply of cold air.

[0033] An airflow channel 15a is opened on the bottom side of the air blowing pipe 15 facing the hot riveting post sleeve 10. The airflow channel 15a is aligned with the corresponding cooling hole 10a, and the center line of the airflow channel 15a forms an angle α with the axis of the hot riveting post sleeve 10, where 15°≤α≤45°. When α is within this range, the airflow channel 15a points to the bottom of the hot riveting post sleeve 10.

[0034] Example 2 See Figure 6 Based on Embodiment 1, this embodiment requires protection of the hot riveting fixture, including a hot riveting column structure and a vacuum forming bracket 2. The vacuum forming bracket 2 is provided with several hot riveting protrusions 20. The hot riveting protrusions 20 refer to the connection parts formed by applying pressure to soften or melt the rivet or rivet column by heating during the hot riveting process. The hot riveting protrusions 20 are directly above the hot riveting column sleeve 10.

[0035] This hot riveting fixture is used for the following hot riveting process: S1. Assembly of the hot riveting column structure; specifically, to ensure that the second limiting block 13 is aligned with the interval 11a, the hot riveting column body 12 is inserted into the hot riveting column sleeve 10 from top to bottom, and the hot riveting column body 12 is rotated. Under the action of the spring 14, the second limiting block 13 and the first limiting block 11 are in contact with each other.

[0036] S2. Riveting stage of hot riveting column structure; specifically, align the hot riveting column sleeve 10 with the hot riveting protrusion 20, and press down the hot riveting column body 12 so that the bottom of the hot riveting column sleeve 10 contacts the hot riveting protrusion 20. At this time, the spring 14 is in a slightly compressed state; continue to press down the hot riveting column body 12 so that the hot riveting column body 12 is pressed tightly against the bottom of the hot riveting column sleeve 10. At this time, the spring 14 is in a fully compressed state. Heat the hot riveting column body 12 to a preset temperature, such as 180-220℃. The heat is transferred to the hot riveting protrusion 20 through the bottom of the hot riveting column sleeve 10, and the hot riveting protrusion 20 melts.

[0037] S3. Cooling stage of air blowing pipe 15: Specifically, the hot riveting post body 12 is raised until the spring 14 is in a slightly compressed state. At this time, the hot riveting post body 12 has detached from the bottom of the hot riveting post sleeve 10, while the hot riveting post sleeve 10 is still pressed against the hot riveting protrusion 20. The valve is then opened. Cold air enters the air blowing pipe 15 through the cold air pipe and is blown to the bottom of the hot riveting post sleeve 10 through the cooling hole 10a, rapidly cooling the molten hot riveting protrusion 20.

[0038] It is worth mentioning that this stage can be automatically opened and closed through electrical control. For example, the valve is preferably a solenoid valve. A temperature sensor is set at the hot riveting column sleeve 10. When the temperature sensor detects that the temperature has reached the temperature that needs to be cooled, the temperature sensor outputs a signal to the solenoid valve. The solenoid valve sprays cold air within 0.5 seconds. When the temperature sensor detects that the temperature has dropped below 60°C, it stops supplying cold air and outputs a signal to the solenoid valve to close it.

[0039] It is worth mentioning that, in this application, the preferred air temperature is 5-10℃, and the air pressure adjustment range is 0.2~0.6MPa. The preferred temperature sensor is a PT100 temperature sensor with a detection accuracy of ±0.5℃. The solenoid valve has a valve orifice diameter of Φ1.2mm. In this embodiment, firstly, by setting up a hot riveting post sleeve 10, a hot riveting post body 12, and a spring 14, heat is quickly transferred to the hot riveting protrusion 20 via the hot riveting post sleeve 10 during hot riveting. After hot riveting, the hot riveting post sleeve 10 and the hot riveting post body 12 quickly separate. At this time, under the action of the spring 14, the hot riveting post sleeve 10 and the hot riveting protrusion 20 remain in contact, while the hot riveting post body 12 moves away. Combined with the air blowing pipe 15 connecting to cold air, this means that the cold air can directly cool the hot riveting protrusion 20 without affecting the heat of the hot riveting post body 12. Therefore, after cooling, the hot riveting protrusion 20 can quickly set, avoiding the problem of PVC stringing caused by the lifting process of traditional hot riveting posts, which leads to poor appearance. The entire hot riveting post structure is compact, greatly improving the quality of hot riveting.

[0040] Secondly, the center line of the airflow channel 15a is further defined to form an angle α with the axis of the hot riveting column head 10, so that the cold air can be directly aimed at the bottom of the hot riveting column head 10, that is, the hot riveting protrusion 20, to cool it down, making the shaping effect easier to control.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hot-riveted column structure, characterized in that, It includes a sleeve, a hot riveting column body, an elastic unit, and an air blowing pipe; the hot riveting column bodies are arranged coaxially inside the sleeve, and elastic units are set between them; cooling holes are opened at the bottom of the sleeve wall, and an air blowing pipe is set on the outer wall of the sleeve, with the air outlet of the air blowing pipe passing through the cooling holes and aligned with the bottom of the sleeve.

2. The hot-riveting column structure according to claim 1, characterized in that, An airflow channel is opened on the bottom side of the air blowing pipe facing the sleeve, and the airflow channel forms the air outlet of the air blowing pipe.

3. The hot-riveting column structure according to claim 2, characterized in that, The centerline of the airflow channel forms an angle α with the axis of the sleeve, where 15°≤α≤45°.

4. The hot-riveting column structure according to claim 1, characterized in that, A first limiting block is radially protruding from the mouth of the sleeve barrel, and the first limiting block and the mouth of the sleeve barrel enclose a fan-shaped groove structure.

5. The hot-riveting column structure according to claim 4, characterized in that, The hot-riveted column body has a second limiting block protruding radially. The transverse cross section of the second limiting block is a sector block structure that is adapted to or smaller than the sector groove.

6. The hot-riveting column structure according to claim 5, characterized in that, The hot riveting column body located inside the sleeve barrel cavity is fitted with an elastic unit. One end of the elastic unit abuts against the inner wall of the bottom of the sleeve barrel, and the other end abuts against the bottom of the second limiting block.

7. The hot-riveting column structure according to claim 1, characterized in that, The elastic element is a spring.

8. The hot-riveting column structure according to claim 1, characterized in that, The cooling holes are semi-circular in shape.

9. The hot-riveting column structure according to claim 8, characterized in that, As the casing moves inward, the diameter of the cooling holes gradually decreases.

10. A hot riveting fixture, characterized in that, The invention includes the hot riveting column structure and the vacuum forming bracket as described in any one of claims 1 to 9, wherein the vacuum forming bracket is provided with a plurality of hot riveting protrusions, and the sleeve is directly above it.

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