Machining device for inner sleeve of heat exchanger

Abstract

The utility model discloses a heat exchanger inner sleeve machining device which comprises a workpiece, the workpiece is cylindrical and is formed by stretching a plate at a time, a plurality of protrusions are evenly arranged on the circumferential inner wall of the workpiece, and concave parts corresponding to the protrusions are arranged on the circumferential inner wall of the workpiece; the pressing mechanism comprises an upper die and a lower die, the lower die is provided with a rolling supporting part used for supporting a workpiece, a plurality of grooves are evenly formed in the circumferential surface of the rolling supporting part, and the upper die is provided with a pressing part used for being matched with the grooves so as to press protrusions and sunken parts on the workpiece; the workpiece is formed through one-time stretching of a plate, the situation that in the prior art, the workpiece is formed through welding, no welding seam exists on the whole, protrusions on the inner wall of the workpiece are formed through pressing of a pressing part is avoided, the same effect as that of fins in the prior art is achieved, meanwhile, welding is avoided, and the problem of welding hole leakage caused by the fact that the welding quality does not reach the standard is solved; the processing qualified rate is improved, and the cost is saved.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle fuel heater processing technology, specifically to a processing device for heat exchanger inner sleeves. Background Technology

[0002] Liquid fuel oil heaters, as relatively independent heat sources, are less affected by external factors and are widely used in heating and engine preheating in vehicles such as automobiles and ships. The heat exchanger structure of a liquid fuel oil heater has a significant impact on its heat exchange efficiency, safety, and reliability.

[0003] In the existing technology, the inner sleeve of the heat exchanger of the liquid fuel oil heater is generally formed by rolling and welding sheet metal into a head, and fins are welded inside to increase the heat exchange area. The inner sleeve body has one straight weld and one circumferential weld. In order to increase the heat conduction effect between the fins and the inner sleeve, the fins and the inner sleeve also need to be fully welded. This requires very high welding quality. If it is not controlled well, phenomena such as weld hole leakage will occur, resulting in product scrap.

[0004] Therefore, in response to the question of how to improve the first-pass yield of products, we proposed a heat exchanger inner sleeve processing device. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a heat exchanger inner sleeve processing apparatus.

[0006] In a first aspect, this application provides a heat exchanger inner sleeve processing apparatus, comprising:

[0007] The workpiece is cylindrical and is formed by stretching a sheet of material in one step. The inner wall of the workpiece is uniformly provided with multiple protrusions, and the outer wall of the workpiece is provided with recesses corresponding to the protrusions.

[0008] The pressing mechanism includes an upper mold and a lower mold. The lower mold has a rolling support part for supporting the workpiece. The rolling support part has a plurality of grooves evenly arranged on its circumferential surface. The upper mold has a pressing part for cooperating with the grooves to press out the protrusions and recesses.

[0009] According to the technical solution provided in the embodiments of this application, the lower mold includes a lower base, one end of which is fixedly connected to a vertical plate. The vertical plate is rotatably provided with the rolling support part through a first driving member. The rolling support part is located above the lower base. The first driving member is fixedly disposed on the side wall of the vertical plate away from the rolling support part. The first driving member has a driving end, which passes through the vertical plate and is coaxially fixedly connected to the rolling support part.

[0010] According to the technical solution provided in the embodiments of this application, a flipping component is provided on the lower base. The flipping component includes a movable support part, which is movably disposed at one end of the lower base away from the upright plate. The top of the movable support part has an arc-shaped structure, which is adapted to the workpiece and is used to support the workpiece.

[0011] According to the technical solution provided in the embodiments of this application, the flipping assembly further includes a second driving member. The second driving member has a first fixed end and a first telescopic end. The first fixed end is rotatably connected to the side wall of the lower base. The first telescopic end is rotatably connected to a connecting rod. The end of the connecting rod away from the second driving member is fixedly connected to the movable support part. The movable support part can be driven to rotate through the first telescopic end.

[0012] According to the technical solution provided in the embodiments of this application, it further includes a push-out mechanism, which includes a third driving member. The third driving member is fixedly disposed on the side wall of the upright plate and is disposed on the same side as the first driving member. The third driving member has a second telescopic end, which extends through the upright plate to the other side of the upright plate and is used to push the workpiece away from the rolling support.

[0013] According to the technical solution provided in the embodiments of this application, the upper mold includes an upper base, which is connected to an external mechanism. Telescopic rods are provided on both sides of the bottom of the upper base. A pressing part is fixedly connected to the bottom of the telescopic rod. The bottom of the pressing part has an arc-shaped structure and is adapted to the workpiece.

[0014] According to the technical solution provided in the embodiments of this application, the pressing part has a through opening, and the bottom of the upper base is fixedly connected to a pressing part, which extends into the through opening and is used to press the protrusion and recess of the workpiece as the upper base moves downward.

[0015] According to the technical solution provided in the embodiments of this application, an elastic element is sleeved on the telescopic rod.

[0016] In summary, this technical solution specifically discloses a heat exchanger inner sleeve processing device, including a workpiece, which is cylindrical and formed by one-time stretching of a sheet metal. The workpiece has multiple protrusions evenly arranged on its circumferential inner wall, and the workpiece also has recesses corresponding to the protrusions on its circumferential inner wall. The pressing mechanism includes an upper mold and a lower mold. The lower mold has a rolling support part for supporting the workpiece. The rolling support part has multiple grooves evenly arranged on its circumferential surface. The upper mold has a pressing part for cooperating with the grooves to press the protrusions and recesses onto the workpiece.

[0017] The workpiece is formed by stretching the sheet metal in one step, avoiding the welding process in existing technologies. This results in a seamless overall structure. The protrusions on the inner wall of the workpiece are formed by pressing, achieving the same effect as fins in existing technologies. This also avoids welding, thus preventing weld leakage caused by substandard welding quality. This improves the processing qualification rate and saves costs. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the workpiece.

[0020] Figure 2 This is a schematic diagram of the processing device for the inner sleeve of a heat exchanger.

[0021] Figure 3 This is a sectional view of the upper mold.

[0022] The following are the labels in the diagram: 1. Workpiece; 2. Protrusion; 3. Recess; 4. Upper mold; 5. Lower mold; 6. Rolling support; 7. Groove; 8. Pressing part; 9. Lower base; 10. Vertical plate; 11. First driving component; 12. Movable support; 13. Second driving component; 14. Connecting rod; 15. Third driving component; 16. Upper base; 17. Telescopic rod; 18. Pressing part; 19. Elastic component. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] Please refer to Figures 1 to 3 As shown, the heat exchanger inner sleeve processing device includes:

[0027] Workpiece 1 is cylindrical and is formed by stretching a sheet metal in one step, with one end open.

[0028] Specifically, the sheet metal is stretched and formed by an external stretching mechanism, which can be in the form of upper and lower molds. One mold is a raised structure, and the other mold is a recessed structure. The two molds are joined together, and the sheet metal can be stretched and formed in one step. The workpiece 1 is made by stretching, which completely avoids the problem of weld seams in the prior art, and also avoids the phenomenon of weld leakage caused by inadequate welding.

[0029] The pressing mechanism has a rolling support 6 and is used to process the workpiece 1 to press out protrusions 2 and recesses 3 on the workpiece 1.

[0030] Specifically, the pressing mechanism includes an upper mold 4 and a lower mold 5. The lower mold 5 includes a lower base 9. A vertical plate 10 is fixedly connected to one end of the lower base 9. A first driving member 11 is fixedly connected to the side wall of the vertical plate 10 away from the lower base 9. Optionally, the first driving member 11 is a servo motor. A rolling support part 6 is rotatably provided on the side wall of the vertical plate 10 away from the first driving member 11. The first driving member 11 has a driving end, which passes through the vertical plate 10 and is coaxially fixedly connected to the rolling support part 6.

[0031] Furthermore, a plurality of grooves 7 are uniformly provided on the circumferential surface of the rolling support 6, and the grooves 7 extend along the length direction of the rolling support 6;

[0032] Thus, driven by the first driving member 11, the rolling support 6 can rotate, thereby driving the workpiece 1 to rotate. Each time the first driving member 11 runs, it drives the workpiece 1 to rotate by a preset angle, so that the pressing mechanism can process the workpiece 1 to press out the protrusion 2 and the recess 3 on the workpiece 1.

[0033] Correspondingly, the inner wall of the workpiece 1 has a plurality of protrusions 2 evenly arranged, and the outer wall of the workpiece 1 has a recess 3 corresponding to the protrusions 2. The protrusions 2 and the recess 3 extend along the length direction of the workpiece 1 and are formed by pressing by a pressing mechanism.

[0034] The upper mold 4 includes an upper base 16, which is connected to an external mechanism. The external mechanism can drive the upper mold 4 to move. The upper base 16 has telescopic rods 17 on both sides of its bottom. The bottom of the telescopic rods 17 is fixedly connected to a pressing part 18. The bottom of the pressing part 18 has an arc-shaped structure and is adapted to the workpiece 1.

[0035] The lower pressing part 18 has a through opening in the middle, and the pressing part 8 is fixedly connected to the middle of the bottom of the upper base 16. The pressing part 8 extends into the through opening and is used to press the workpiece 1 to form a protrusion 2 and a recess 3 as the upper base 16 moves down.

[0036] Thus, by moving the upper base 16 downward through the external mechanism, the lower pressing part 18 can be moved downward, so that the bottom of the lower pressing part 18 can fit against the workpiece 1. As the upper base 16 continues to move downward, the pressing part 8 can move out of the opening, thereby contacting the workpiece 1 and pressing the workpiece 1. Then, the pressing part 8 can drive the area on the workpiece 1 that is in contact with itself into the groove 7 of the rolling support part 6, thereby processing the workpiece 1 and finally pressing out the protrusion 2 and the recess 3.

[0037] It should be noted that the telescopic rod 17 is fitted with an elastic element 19 to achieve pre-tightening when the pressing part 18 is in contact with the workpiece 1, so as to ensure that the upper mold 4 and the lower mold 5 have sufficient clamping force on the workpiece 1 when they are closed, and to prevent the workpiece 1 from shifting.

[0038] A flipping assembly is provided on the lower base 9. The flipping assembly includes a movable support part 12. The movable support part 12 is movably disposed at one end of the lower base 9 away from the vertical plate 10. The top of the movable support part 12 is an arc-shaped structure, which is adapted to the workpiece 1 and is used to support the workpiece 1.

[0039] Furthermore, the flipping assembly also includes a second drive member 13, which has a first fixed end and a first telescopic end. The first fixed end is rotatably connected to the side wall of the lower base 9, and the first telescopic end is rotatably connected to a connecting rod 14. The end of the connecting rod 14 away from the second drive member 13 is fixedly connected to the movable support part 12. Optionally, the second drive member 13 may be a telescopic hydraulic cylinder.

[0040] Therefore, the extension and retraction of the first telescopic end can drive the movable support part 12 to rotate, so that when loading or unloading the workpiece 1, the movement of the workpiece 1 can be uninterrupted.

[0041] It also includes a push-out mechanism, which includes a third drive member 15. The third drive member 15 is fixedly installed on the side wall of the upright plate 10, and is located on the same side as the first drive member 11 and below the first drive member 11. The third drive member 15 has a second telescopic end, which extends through the upright plate 10 to the other side of the upright plate 10, and is used to push the workpiece 1 away from the rolling support part 6. Optionally, the third drive member 15 can be a telescopic hydraulic cylinder.

[0042] Working principle: Before the workpiece 1 is loaded, the second drive component 13 is activated, and the first telescopic end extends and retracts, causing the movable support part 12 to rotate, so that the movable support part 12 is parallel to the lower base 9. Then, the open end of the workpiece 1 is loaded, so that the workpiece 1 is covered on the rolling support part 6. Then, the second drive component 13 is activated again, and the first telescopic end extends and retracts, causing the movable support part 12 to rotate, so that the movable support part 12 is perpendicular to the lower base 9. The top of the movable support part 12 is in contact with the surface of the workpiece 1, thereby supporting the workpiece 1.

[0043] After the workpiece 1 is loaded, the upper mold 4 is moved by the external mechanism, the upper base 16 and the lower pressing part 18 move down, the lower pressing part 18 fits against the upper surface of the workpiece 1, and is pre-tightened under the action of the elastic element 19 to prevent the workpiece 1 from shifting. The upper base 16 continues to move down, pressing and contacting the surface of the workpiece 1, and driving the area in contact with it into the groove 7. At this point, the pressing is achieved, and the outer surface of the workpiece 1 has a recessed part 3 and the inner surface has a protrusion 2.

[0044] After one pressing, the external mechanism drives the upper mold 4 to move upward away from the workpiece 1. Then, the first driving component 11 drives the rolling support 6 to rotate at a preset angle. The external mechanism then drives the upper mold 4 to move downward again, continuing to press out the recess 3 and the protrusion 2. This process is repeated until the workpiece 1 is finally processed. After the process is completed, the external mechanism drives the upper mold 4 to move upward away from the workpiece 1. The second driving component 13 drives the movable support 12 to flip, making the movable support 12 parallel to the lower base 9. The third driving component 15 is activated, and the second telescopic end extends, pushing the workpiece 1 away from the rolling support 6. This completes the unloading process.

[0045] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A heat exchanger inner sleeve machining apparatus characterized by, Include: Workpiece (1), the workpiece (1) is cylindrical, once stretch forming by sheet material, the workpiece (1) circumferential inner wall is uniformly provided with multiple protrusions (2), the workpiece (1) circumferential outer wall is provided with the recess (3) corresponding with the protrusion (2); Pressing mechanism, the pressing mechanism includes upper die (4) and lower die (5), the lower die (5) has rolling support part (6), for supporting the workpiece (1), the circumferential surface of the rolling support part (6) is uniformly provided with multiple grooves (7), the upper die (4) has pressing part (8), for cooperating with the groove (7), to press out the protrusion (2) and recess (3).

2. The heat exchanger inner liner machining apparatus according to claim 1, characterized by, The lower die (5) includes lower base (9), one end of the lower base (9) is fixedly connected with vertical plate (10), the vertical plate (10) is rotatably provided with the rolling support part (6) through the first drive (11), the rolling support part (6) is located above the lower base (9), the first drive (11) is fixedly arranged on the side wall of the vertical plate (10) away from the rolling support part (6), the first drive (11) has drive end, the drive end penetrates the vertical plate (10) and the rolling support part (6) coaxially fixed connection.

3. The heat exchanger inner liner machining apparatus according to claim 2, characterized by, The lower base (9) is provided with turnover assembly, the turnover assembly includes movable support part (12), the movable support part (12) is movably arranged at one end of the lower base (9) away from the vertical plate (10), and the top of the movable support part (12) is arc-shaped structure, which is matched with the workpiece (1), for supporting the workpiece (1).

4. The heat exchanger inner liner machining apparatus according to claim 3, characterized by The turnover assembly further includes second drive (13), the second drive (13) has first fixed end and first telescopic end, the first fixed end is rotatably connected with the side wall of the lower base (9), the first telescopic end is rotatably connected with connecting rod (14), one end of the connecting rod (14) away from the second drive (13) is fixedly connected with the movable support part (12), the first telescopic end can drive the movable support part (12) to rotate.

5. The heat exchanger inner liner machining apparatus according to claim 4, wherein It also includes push-out mechanism, the push-out mechanism includes third drive (15), the third drive (15) is fixedly arranged on the side wall of the vertical plate (10), and is arranged on the same side with the first drive (11), the third drive (15) has second telescopic end, the second telescopic end penetrates the vertical plate (10) and extends to the other side of the vertical plate (10), for pushing the workpiece (1) away from the rolling support part (6).

6. The heat exchanger inner liner machining apparatus according to claim 1, wherein The upper die (4) includes upper base (16), which is connected with external mechanism, the bottom of the upper base (16) is provided with telescopic rod (17) on both sides, the bottom of the telescopic rod (17) is fixedly connected with lower pressing part (18), the bottom of the lower pressing part (18) is arc-shaped structure, and is matched with the workpiece (1).

7. The heat exchanger inner liner machining apparatus according to claim 6, wherein The lower pressing part (18) is provided with a through hole, the bottom of the upper base (16) is fixedly connected with the pressing part (8), the pressing part (8) extends into the through hole, and the pressing part (8) is used for pressing the workpiece (1) to form the protrusion (2) and the recess (3) with the upper base (16) moving downward.

8. The heat exchanger inner liner machining apparatus according to claim 6, wherein The elastic member (19) is sleeved on the telescopic rod (17).

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