Device for rapidly cooling and relieving stress after hot charging of gravure roller shaft head

Abstract

The invention discloses a device for rapidly cooling and relieving stress after hot charging of a gravure roller shaft head, relates to the technical field of gravure roller production, and aims to solve the problems that in the prior art, after hot charging of the gravure roller shaft head, the natural cooling speed is low, residual stress is easily generated, and the dimensional stability and the service life of a gravure roller are affected. Guide rails which are symmetrically arranged are connected to the top of the base, supports are slidably connected to the tops of the guide rails, cooling covers are fixedly connected to the opposite faces between the supports, fans are fixedly connected to the tops of the supports, and air inlets of the fans communicate with the interiors of the cooling covers through pipelines correspondingly. Cooling pipes are arranged in the cooling covers, one ends of the cooling pipes penetrate through the cooling covers to the outer parts of the cooling covers and are fixedly connected with the cooling covers, and a plurality of vibration aging instruments are arranged in the cooling covers. The printing roller has the advantages of improving the stability and prolonging the service life of the printing roller.

Description

Technical Field

[0001] This invention relates to the field of gravure printing roller production technology, and more specifically, to a device for rapid cooling and stress relief after heat mounting of the gravure printing roller shaft head. Background Art

[0002] As a core printing component, the assembly precision and structural stability of the gravure printing roller directly affect the clarity of the printed matter, the accuracy of registration, and the production efficiency. Its shaft head, as a key component connecting the printing roller and the transmission system of the printing equipment, is usually fitted with a heat-fitting process to achieve a tight fit with the printing roller body. However, in existing hot-fitting processes, natural cooling is often used after the printing roller and shaft head are hot-fitted. Natural cooling is not only uneven in speed but also slow, easily generating significant residual stress between the shaft head and the printing roller body. This residual stress can cause dimensional inaccuracies in the printing roller during subsequent use, affecting printing registration accuracy. Furthermore, it may lead to fatigue damage in stress concentration areas under long-term alternating loads, significantly shortening the lifespan of the printing roller and increasing production costs and equipment maintenance pressure for enterprises. Therefore, we propose a rapid cooling and stress relief device for the gravure printing roller shaft head after hot fitting. Summary of the Invention

[0003] The purpose of this invention is to provide a device for rapid cooling and stress relief after heat mounting of the gravure printing roller head, which aims to solve the problem in the prior art that the natural cooling rate of the printing roller head after heat mounting is slow, easily generating residual stress, affecting the dimensional stability and service life of the printing roller.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a device for rapid cooling and stress relief of gravure printing roller head after heat fitting, comprising a base, a symmetrically arranged guide rail connected to the top of the base, a bracket slidably connected to the top of the guide rail, a cooling cover fixedly connected to the opposite side of each bracket, a fan fixedly connected to the top of each bracket, the air inlet of each fan communicating with the interior of the cooling cover through a pipe, a cooling pipe provided inside the cooling cover, one end of each cooling pipe penetrating through the cooling cover to the outside and fixedly connected thereto, multiple vibration aging instruments provided inside the cooling cover, a semi-circular clamp fixedly connected to the vibration generating part of each vibration aging instrument, multiple fixing grooves penetrating through the outer wall of the cooling pipe, the clamp passing through the fixing grooves respectively, a cooling groove provided on the inner wall of the cooling pipe, and multiple air inlet grooves communicating with the interior of the cooling grooves on the outer wall of the cooling pipe located outside the cooling cover.

[0005] Preferably, the inner wall of the cooling cover has an adjustment groove that passes through it, the inner wall of the adjustment groove has a sliding groove, the inner wall of the sliding groove is slidably connected to a sliding plate, one of the plurality of vibration aging instruments is fixedly connected to the outer wall of the sliding plate, the other vibration aging instruments are fixedly connected to the inner wall of the cooling cover, the outer wall of the cooling cover is fixedly connected to a fixing cover, the outside of the fixing cover is provided with a threaded rod, one end of the threaded rod passes through the fixing cover into its interior and is threadedly connected thereto, and the end of the threaded rod located inside the fixing cover is rotatably connected to a linkage block, the outer wall of the linkage block is fixedly connected to the other outer wall of the sliding plate.

[0006] Preferably, a plurality of guide rings are fixedly connected to the inner wall of the cooling tank. The guide rings are arranged in sequence and evenly on the inner wall of the cooling tank, and the inner walls of the guide rings are arranged to form a heat dissipation channel.

[0007] Preferably, the outer wall of the guide ring is recessed inward to form a semi-circular guide surface, and the guide surface is located on the outer wall of the guide ring near the air inlet groove.

[0008] Preferably, the inner wall of the guide ring gradually extends towards its center, and after the inner wall of the guide ring extends, the inner diameter of the heat dissipation channel formed by its inner wall gradually decreases from one end near the air inlet groove to the other end.

[0009] Preferably, a retaining ring is fixedly connected to one end of the cooling pipe inside the cooling cover, and a plurality of exhaust slots communicating with the interior of the cooling tank are evenly opened on the outer wall of the cooling pipe near the retaining ring.

[0010] Preferably, the exhaust channels are arranged at an angle, and the angles of adjacent exhaust channels are opposite.

[0011] Preferably, the side of the clamping plate away from the vibration aging instrument extends to form multiple reinforcing parts, and the reinforcing parts are all semi-circular structures.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention, by setting up a base, guide rail, bracket, cooling cover, fan, cooling pipe, vibration aging device, clamping plate, fixing groove, cooling groove, and air inlet groove, enables the air flowing in the cooling groove to come into contact with the heat-fitted joint between the printing roller and the shaft head, thereby cooling it and increasing the cooling rate. Furthermore, the vibration aging device not only fixes the printing roller through the clamping plate, but also contacts the printing roller through the clamping plate during operation, thereby eliminating residual stress at the heat-fitted joint of the printing roller shaft head through vibration aging, thus increasing the stability and service life of the printing roller.

[0013] In this invention, multiple guide rings are fixedly connected inside the cooling tank. When air flows from the cooling tank, it first enters the heat dissipation channel formed between the guide rings, and then passes through the guide rings in sequence. As the air is blocked by the guide rings, eddies are generated in the gaps between the guide rings, which increases the number of times the air contacts the printing roller and the contact effect, thereby further increasing the cooling effect on the hot joint of the printing roller shaft.

[0014] In this invention, since the inner walls of the guide rings all extend towards the center, and the inner diameter of the heat dissipation channel gradually decreases from one end near the air inlet slot to the other end, the volume of air flowing through the air increases due to the larger inner diameter of the previous guide ring. This air then contacts the guiding surfaces on the guide rings with gradually decreasing inner diameters in sequence, thus ensuring the guiding effect of the guide rings on the air. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Enlarged view of section A in the image; Figure 3 This is a cross-sectional view of the cooling shroud in this invention; Figure 4 for Figure 3 Enlarged view of section B in the image; Figure 5 This is a first cross-sectional view of the cooling pipe in this invention; Figure 6 This is a second cross-sectional view of the cooling pipe in this invention; Figure 7 This is a cross-sectional view of the flow guide ring in this invention; Figure 8 This is a schematic diagram of the clamping plate in this invention.

[0016] Explanation of the labels in the diagram: 1. Base; 2. Guide rail; 3. Bracket; 4. Cooling cover; 5. Fan; 6. Cooling pipe; 7. Vibration aging tester; 8. Clamping plate; 9. Fixing groove; 10. Cooling groove; 11. Air inlet groove; 12. Adjusting groove; 13. Slide groove; 14. Slide plate; 15. Fixing cover; 16. Threaded rod; 17. Linkage block; 18. Guide ring; 19. Guide surface; 20. Baffle ring; 21. Exhaust groove; 22. Reinforcing part. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Example

[0018] like Figure 1-8 As shown, a rapid cooling and stress relief device for the heat-mounted head of a gravure printing plate includes a base 1. The top of the base 1 is connected to symmetrically arranged guide rails 2. The top of the guide rails 2 is slidably connected to a bracket 3. Cooling covers 4 are fixedly connected to opposite sides of the brackets 3. Fans 5 are fixedly connected to the top of the brackets 3. The air inlets of the fans 5 are connected to the interior of the cooling covers 4 through pipes. Cooling pipes 6 are provided inside the cooling covers 4. One end of the cooling pipe 6 passes through the cooling cover 4 to the outside and is fixedly connected thereto. Multiple vibration aging instruments 7 are provided inside the cooling covers 4. The vibration generating part of the vibration aging instrument 7 is fixedly connected to a semi-circular clamping plate 8. Multiple fixing grooves 9 are opened on the outer wall of the cooling pipes 6 to pass through them. The clamping plate 8 passes through the fixing grooves 9 respectively. Cooling grooves 10 are opened on the inner wall of the cooling pipes 6. Multiple air inlet grooves 11 are opened on the outer wall of the cooling pipes 6 located outside the cooling covers 4 and communicate with the interior of the cooling grooves 10.

[0019] Specifically, after the gravure printing plate roller head is hot-mounted, one end of the plate roller is inserted into the cooling pipe 6, and then the support 3 moves on the guide rail 2, so that the support 3 drives the cooling cover 4 to move, thereby causing the other cooling cover 4 to drive the cooling pipe 6 to move, so that the other end of the plate roller is inserted into the cooling pipe 6 on this side, and then the fan 5 is started to run. During operation, the fan 5 draws air out of the cooling shroud 4, creating a negative pressure inside the cooling shroud 4. At this time, outside air enters the cooling trough 10 through the air inlet 11 and then enters the cooling shroud 4 through the cooling trough 10. During this process, the air flowing in the cooling trough 10 comes into contact with the heat-fitted joint between the printing roller and the shaft head, thereby cooling it and increasing the cooling speed. In addition, the vibration aging device 7 not only fixes the printing roller through the clamping plate 8, but also contacts the printing roller through the clamping plate 8 during operation, thereby eliminating residual stress at the heat-fitted joint of the printing roller shaft head through vibration aging, thus increasing the stability and service life of the printing roller.

[0020] Furthermore, the inner wall of the cooling cover 4 is provided with an adjustment groove 12 through which it passes. The inner wall of the adjustment groove 12 is provided with a sliding groove 13. A sliding plate 14 is slidably connected to the inner wall of the sliding groove 13. One of the multiple vibration aging instruments 7 is fixedly connected to the outer wall of the sliding plate 14, and the other vibration aging instruments 7 are fixedly connected to the inner wall of the cooling cover 4. A fixed cover 15 is fixedly connected to the outer wall of the cooling cover 4. A threaded rod 16 is provided on the outside of the fixed cover 15. One end of the threaded rod 16 passes through the fixed cover 15 into its interior and is threadedly connected to it. The end of the threaded rod 16 located inside the fixed cover 15 is rotatably connected to a linkage block 17. The outer wall of the linkage block 17 is fixedly connected to the other outer wall of the sliding plate 14.

[0021] Specifically, the outer wall of the cooling cover 4 is provided with an adjustment groove 12, and a sliding groove 13 is provided inside the adjustment groove 12. The slide plate 14 is slidably connected in the sliding groove 13, so the slide plate 14 can move in the sliding groove 13. The outer wall of the slide plate 14 is fixedly connected to one of the multiple vibration aging instruments 7. Therefore, the slide plate 14 can drive the vibration aging instrument 7 to move together during the movement, so that the movement of the vibration aging instrument 7 is fixed to the printing roller by the clamping plate 8. By rotating the threaded rod 16, one end of the threaded rod 16 moves into the fixed cover 15 that is threadedly connected to it. During the movement of the threaded rod 16, the linkage block 17 moves together, and the movement of the linkage block 17 will drive the slide plate 14 to move, thereby realizing the position adjustment of the vibration aging instrument 7. Similarly, by reversing the threaded rod 16, the vibration aging instrument 7 can be moved away from the printing roller, thereby facilitating the disassembly of the printing roller.

[0022] Furthermore, multiple guide rings 18 are fixedly connected to the inner wall of the cooling tank 10. The guide rings 18 are arranged in sequence and evenly on the inner wall of the cooling tank 10, and the inner walls of the guide rings 18 are arranged in sequence and evenly to form a heat dissipation channel.

[0023] Specifically, multiple guide rings 18 are fixedly connected inside the cooling tank 10, so that when air flows from the cooling tank 10, it first enters the heat dissipation channel formed between the guide rings 18, and then passes through the guide rings 18 in sequence. As the air is blocked by the guide rings 18, vortices are generated in the gaps between the guide rings 18, which increases the number of times the air contacts the printing roller and the contact effect, thereby further increasing the cooling effect on the hot joint of the printing roller shaft.

[0024] Furthermore, the outer wall of the guide ring 18 is recessed inward to form a semi-circular guide surface 19, and the guide surface 19 is located on the outer wall of the guide ring 18 near the air intake groove 11.

[0025] Specifically, the guide surface 19 formed on the outer wall of the guide ring 18 can guide the air, so that when the air comes into contact with the guide surface 19, the guide surface 19 increases and forms a vortex effect, thereby further increasing the cooling effect of the air on the printing roller head.

[0026] Furthermore, the inner wall of the guide ring 18 gradually extends towards its center, and after the inner wall of the guide ring 18 extends, the inner diameter of the heat dissipation channel formed by its inner wall gradually decreases from one end near the air intake groove 11 to the other end.

[0027] Specifically, when air flows through the heat dissipation channel, the inner walls of the guide rings 18 extend towards the center, and the inner diameter of the heat dissipation channel gradually decreases from one end near the air inlet groove 11 to the other end. This results in the volume of air flowing through the channel increasing as the inner diameter of the previous guide ring 18 is larger. As the air flows through the channel, it will come into contact with the guide surfaces 19 on the guide rings 18 with gradually decreasing inner diameters in sequence. This ensures the guiding effect of the guide rings 18 on the air and increases the effect of generating eddies to cool the printing roller head.

[0028] Furthermore, a retaining ring 20 is fixedly connected to one end of the cooling pipe 6 inside the cooling cover 4, and multiple exhaust slots 21 that communicate with the interior of the cooling tank 10 are evenly opened on the outer wall of the cooling pipe 6 near the retaining ring 20.

[0029] Specifically, the retaining ring 20 limits the end of the printing roller to prevent misalignment between the heat-sealed part of the printing roller shaft and the cooling tank 10. The retaining ring 20 also covers the other end of the cooling tank 10, allowing air to be discharged from the exhaust groove 21. The air discharged from the exhaust groove 21 disturbs the air in the cooling cover 4, preventing heat accumulation in the cooling cover 4 and affecting the cooling effect on the heat-sealed part of the printing roller shaft.

[0030] Furthermore, the exhaust channels 21 are arranged at an angle, and the angles of two adjacent exhaust channels 21 are opposite.

[0031] Specifically, the exhaust channels 21 are arranged at an angle, so that when the air is discharged from the exhaust channels 21, the exhaust channels 21 guide the air and make the air discharge direction tilted. The tilting directions between two adjacent exhaust channels 21 are opposite. This allows the exhaust channels 21 to guide the air in multiple directions, thereby increasing the effect of turbulence on the hot air inside the cooling cover 4.

[0032] Furthermore, multiple reinforcing parts 22 are formed on the side of the clamping plate 8 away from the vibration aging instrument 7, and the reinforcing parts 22 are all semi-circular structures.

[0033] Specifically, the multiple reinforcing parts 22 formed by the clamping plate 8 enable the clamping plate 8 to achieve a multi-point clamping effect when it is fixed to the printing roller, thereby further increasing the stability when fixing the printing roller.

[0034] Working principle: This embodiment provides a device for rapid cooling and stress relief after hot mounting of gravure printing plate roller head. After hot mounting of gravure printing plate roller head, one end of the plate roller is inserted into the cooling pipe 6, and then the support 3 moves on the guide rail 2, so that the support 3 drives the cooling cover 4 to move, thereby causing the other cooling cover 4 to drive the cooling pipe 6 to move, so that the other end of the plate roller is inserted into the cooling pipe 6 on this side, and then the fan 5 is started to run. During operation, the fan 5 draws air out of the cooling shroud 4, creating a negative pressure inside the cooling shroud 4. At this time, outside air enters the cooling trough 10 through the air inlet 11 and then enters the cooling shroud 4 through the cooling trough 10. During this process, the air flowing in the cooling trough 10 comes into contact with the heat-fitted joint between the printing roller and the shaft head, thereby cooling it and increasing the cooling speed. In addition, the vibration aging device 7 not only fixes the printing roller through the clamping plate 8, but also contacts the printing roller through the clamping plate 8 during operation, thereby eliminating residual stress at the heat-fitted joint of the printing roller shaft head through vibration aging, thus increasing the stability and service life of the printing roller.

[0035] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A device for rapid cooling and stress relief after heat mounting of a gravure printing roller head, characterized in that, Includes a base (1), the top of which is connected to symmetrically arranged guide rails (2), the top of which is slidably connected to a bracket (3), and a cooling cover (4) is fixedly connected to each opposite side of the brackets (3). A fan (5) is fixedly connected to the top of each bracket (3). The air inlets of the fans (5) are connected to the interior of the cooling cover (4) through pipes. A cooling pipe (6) is provided inside the cooling cover (4), and one end of the cooling pipe (6) passes through the cooling cover (4) to its exterior and connects with it. The cooling cover (4) is fixedly connected to a plurality of vibration aging instruments (7). The vibration generating part of the vibration aging instrument (7) is fixedly connected to a semi-circular clamp (8). The outer wall of the cooling pipe (6) is provided with a plurality of fixing grooves (9) through which it passes. The clamp (8) passes through the fixing grooves (9) respectively. The inner wall of the cooling pipe (6) is provided with a cooling groove (10). The outer wall of the cooling pipe (6) located outside the cooling cover (4) is provided with a plurality of air inlet grooves (11) communicating with the interior of the cooling groove (10).

2. The device for rapid cooling and stress relief of the gravure printing roller head after heat fitting according to claim 1, characterized in that, The inner wall of the cooling cover (4) is provided with an adjustment groove (12) through which it passes. The inner wall of the adjustment groove (12) is provided with a sliding groove (13). The inner wall of the sliding groove (13) is slidably connected to a sliding plate (14). One of the multiple vibration aging instruments (7) is fixedly connected to the outer wall of the sliding plate (14). The remaining vibration aging instruments (7) are fixedly connected to the inner wall of the cooling cover (4). The outer wall of the cooling cover (4) is fixedly connected to a fixing cover (15). A threaded rod (16) is provided on the outside of the fixing cover (15). One end of the threaded rod (16) passes through the fixing cover (15) to its interior and is threadedly connected to it. The end of the threaded rod (16) located inside the fixing cover (15) is rotatably connected to a linkage block (17). The outer wall of the linkage block (17) is fixedly connected to the other outer wall of the sliding plate (14).

3. The device for rapid cooling and stress relief of gravure printing roller head after heat fitting according to claim 1, characterized in that, The inner wall of the cooling tank (10) is fixedly connected with a plurality of guide rings (18). The guide rings (18) are arranged in sequence and evenly on the inner wall of the cooling tank (10), and the inner walls of the guide rings (18) are arranged in sequence and evenly to form a heat dissipation channel.

4. The rapid cooling and stress relief device for the gravure printing roller head after heat fitting according to claim 3, characterized in that, The outer wall of the guide ring (18) is recessed inward to form a semi-circular guide surface (19), and the guide surface (19) is located on the outer wall of the guide ring (18) near the air inlet groove (11).

5. The device for rapid cooling and stress relief of gravure printing roller head after heat fitting according to claim 3, characterized in that, The inner walls of the guide ring (18) gradually extend towards the center, and after the inner walls of the guide ring (18) extend, the inner diameter of the heat dissipation channel formed by the inner walls gradually decreases from one end near the air inlet groove (11) to the other end.

6. The device for rapid cooling and stress relief of gravure printing roller head after heat mounting according to claim 1, characterized in that, The cooling pipe (6) is fixedly connected to a retaining ring (20) at one end inside the cooling cover (4). The outer wall of the cooling pipe (6) near the retaining ring (20) is evenly provided with a plurality of exhaust grooves (21) that communicate with the interior of the cooling groove (10).

7. The device for rapid cooling and stress relief after heat mounting of a gravure printing roller head according to claim 6, characterized in that, The exhaust channels (21) are arranged at an angle, and the angles of two adjacent exhaust channels (21) are opposite.

8. The device for rapid cooling and stress relief of gravure printing roller head after heat mounting according to claim 1, characterized in that, The clamping plate (8) extends to form multiple reinforcing parts (22) on the side away from the vibration aging instrument (7), and the reinforcing parts (22) are all semi-circular structures.

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