Adjusting mechanism for a can ender

Abstract

The utility model discloses a kind of adjusting mechanism of metal can bottom sealing device, relate to metal can processing equipment technical field.Its technical scheme main point is: including rack, upper mould of being equipped with fixed tank bottom, lower mould of being equipped with fixed tank body, fixing mechanism, axial moving mechanism, gradual type pressure wheel mechanism and control device.Vacuum pump and gas pipe are realized vacuum adsorption fixation of tank bottom and tank body by fixing mechanism;Axial moving mechanism drives lower mould accurate lifting;The multiple groups of pressure wheel part of gradual type pressure wheel mechanism are gradually reduced in diameter from bottom to top, and the support rod of different inclination angle is cooperated to realize gradual type hemming.The utility model is fixed by vacuum, and it is classified by pressure wheel cooperation, effectively disperses metal material stress, reduces hemming cracking, wrinkle defect, and improves bottom sealing quality stability.

Description

Technical Field

[0001] This utility model relates to the field of metal can processing equipment technology, and more specifically, it relates to an adjustment mechanism for a metal can bottom sealing device. Background Technology

[0002] The edge-rolling process for metal cans is crucial for ensuring their airtightness. Traditional equipment often uses multiple pressure rollers to simultaneously apply pressure to the can's edge, completing the rolling process in a single pass. However, this method has significant drawbacks: the metal material is subjected to multi-directional pressure instantaneously, easily leading to stress concentration and defects such as cracking and wrinkling at the rolled edge. This is especially true for thicker or less ductile metals, resulting in even lower yield rates. Furthermore, existing equipment typically only rotates the can while the pressure rollers remain in fixed positions, making it impossible to adjust the pressure application point according to different stages of the rolling process. This further exacerbates the stress concentration problem. Therefore, a structure that allows for step-by-step adjustment of the pressure applied to the can is needed to improve the yield rate during bottom sealing.

[0003] Therefore, a new solution is needed to address this problem. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an adjustment mechanism for a metal can bottom sealing device.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: An adjusting mechanism for a metal can bottom sealing device includes a frame, on which an upper mold for fixing the can bottom and a lower mold for fixing the can body are mounted. The frame also includes a fixing mechanism, an axial movement mechanism, a progressive pressure roller mechanism, and a control device. The fixing mechanism includes two gas supply pipes and a vacuum pump. One end of each gas supply pipe is respectively mounted on the upper mold and the lower mold, and the other end of the gas supply pipe is connected to the vacuum pump. The axial movement mechanism is used to drive the movement of the lower mold. The axial movement mechanism includes a servo motor and a ball screw. The lower mold is fixedly connected to the screw nut of the ball screw. The progressive pressure roller mechanism includes a mounting frame rotatably connected to the frame and several sets of pressure rollers. The sets of pressure rollers are arranged sequentially from bottom to top, and the diameter of the pressure rollers decreases from bottom to top. Each pressure roller includes a support rod and a rotating wheel. The top end of the support rod is fixedly connected to the mounting frame, and the rotating wheel is rotatably connected to the bottom end of the support rod. The control device is electrically connected to the vacuum pump and the servo motor, respectively.

[0006] The present invention is further configured such that: the pressure roller section is provided in three groups from bottom to top, namely the first pressure roller section, the second pressure roller section and the third pressure roller section, the distance between adjacent pressure roller sections is equal, the diameter of the first pressure roller section is larger than the outer diameter of the tank body, the diameter of the second pressure roller section is equal to the outer diameter of the tank body, and the diameter of the third pressure roller section is smaller than the outer diameter of the tank body.

[0007] The present invention is further configured such that: a through hole is provided at the end of the support rod away from the mounting frame; a bolt is provided on the rotating wheel; the bolt passes through the through hole and is fixed by a nut; and disc springs are provided between the bolt and the support rod, and between the support rod and the nut.

[0008] The present invention is further configured such that: a plurality of vent holes are provided on the side of the upper mold and the lower mold that are close to each other, and the air supply pipes are respectively inserted into the upper mold and the lower mold and the vent holes are connected.

[0009] The present invention is further configured such that: a telescopic rod is provided on the frame, the upper mold is fixedly connected to the bottom end of the telescopic rod, and a spring is sleeved on the outside of the telescopic rod, with both ends fixedly connected to the frame and the upper mold respectively. The elastic force of the spring is less than the vacuum adsorption force when the upper mold fixes the bottom of the tank, and greater than the weight of the upper mold.

[0010] The present invention is further configured such that the control device includes a PLC controller, a touch screen, and several buttons.

[0011] In summary, this utility model has the following beneficial effects: The vacuum adsorption method is used to stably fix the bottom and body of the tank through the upper and lower molds respectively, avoiding displacement during processing. Compared with mechanical clamping, it will not cause damage to the surface of the tank bottom and body. The progressive pressure roller mechanism has multiple pressure rollers with gradually decreasing diameters from bottom to top, and the inclination angle of the support rod gradually increases, which realizes progressive adjustment of the edge of the tank body, effectively dispersing the stress of the metal material, reducing defects such as cracks and wrinkles, and improving the product qualification rate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the mounting frame and several sets of pressure rollers in this utility model; Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0013] In the diagram: 1. Frame; 2. Upper mold; 3. Lower mold; 4. Gas supply pipe; 5. Vacuum pump; 6. Servo motor; 7. Ball screw; 8. Mounting bracket; 9. First pressure roller section; 10. Second pressure roller section; 11. Third pressure roller section; 12. Disc spring; 13. Vent hole; 14. Telescopic rod; 15. Spring; 16. Control device; 17. Support rod; 18. Rotating wheel. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] An adjusting mechanism for a metal can bottom sealing device, such as Figures 1-4 As shown, the machine includes a frame 1, on which an upper mold 2 for fixing the bottom of the tank and a lower mold 3 for fixing the tank body are mounted. The upper mold 2 and the lower mold 3 are mounted on the frame 1 to fix the tank body and the bottom of the tank. Both the upper mold 2 and the lower mold 3 are detachable, and can process metal tanks of different sizes. The frame 1 is equipped with a fixing mechanism, an axial moving mechanism, a progressive pressure roller mechanism and a control device 16.

[0016] The fixing mechanism includes two gas supply pipes 4 and a vacuum pump 5. One end of each gas supply pipe 4 is respectively mounted on the upper mold 2 and the lower mold 3, and the other end of each gas supply pipe 4 is connected to the vacuum pump 5. Several vent holes 13 are provided on the side of the upper mold 2 and the lower mold 3 that are close to each other. The gas supply pipes 4 are inserted into the upper mold 2 and the lower mold 3 respectively, and the vent holes 13 are connected. The bottom of the tank is fixed below the upper mold 2, and the tank body is fixed above the lower mold 3. By setting the program in the control device 16, the vacuum pump 5 is started, and the air between the bottom of the tank and the upper mold 2, and between the tank body and the lower mold 3, is drawn away along the gas supply pipes 4. The bottom of the tank and the upper mold 2, and the tank body and the lower mold 3 are brought to a near-vacuum state, which fixes the bottom and body of the tank. This makes the installation more stable and reduces installation errors. The vacuum adsorption method is used for fixation, which reduces rigid collisions during the fixation process and improves the yield. Several vent holes 13 are evenly distributed in an array to expand the entire adsorption area. The vacuum pump 5 works continuously throughout the sealing process. Adsorption is only stopped after the sealing is completed to facilitate the removal of the tank body and bottom. The vacuum is preferably set to a rotary vane vacuum pump 5 (such as the 2XZ-4 type), with a pumping rate of 4L / s and a vacuum degree controlled between -0.06MPa and -0.08MPa (gauge pressure). The adsorption force of a single mold can reach 500-800N, ensuring that there is no relative displacement between the bottom and body of the tank during the edge rolling process, and avoiding deformation of the bottom and body of the tank due to internal and external pressure differences caused by excessively high vacuum.

[0017] The axial movement mechanism is used to drive the movement of the lower mold 3. The axial movement mechanism includes a servo motor 6 and a ball screw 7. The lower mold 3 is fixedly connected to the screw nut of the ball screw 7. The servo motor 6 is connected to one end of the ball screw 7. When the servo motor 6 drives the ball screw 7 to rotate, the screw nut slides along the axial direction of the ball screw 7, thereby driving the movement of the lower mold 3. The cooperation between the servo motor 6 and the ball screw 7 makes the sliding distance more precisely controlled, with a positioning error of ≤0.01mm. After the servo motor 6 stops working, the lower mold 3 will be fixed in the current position, which is more practical and provides precise cooperation for the graded processing of the progressive pressure roller mechanism.

[0018] A telescopic rod 14 is installed on the frame 1. The upper mold 2 is fixedly connected to the bottom end of the telescopic rod 14. A spring 15 is sleeved on the outside of the telescopic rod 14, with its two ends fixedly connected to the frame 1 and the upper mold 2 respectively. It is preferably made of 65Mn spring 15 steel. The elastic force of the spring 15 is less than the vacuum adsorption force when the upper mold 2 fixes the bottom of the tank, but greater than the weight of the upper mold 2. After the lower mold 3 fixes the tank body, it is pushed upward to contact the bottom of the tank on the lower mold 3. The connection between the bottom of the tank and the tank body is initially fixed. During the continuous upward movement, the elastic force applied by the spring 15 makes the upper mold 2 continuously press against the bottom of the tank to prevent the bottom of the tank from shifting. When the bottom of the tank and the tank body are fixed, the vacuum pump 5 stops adsorption. The telescopic rod 14 can limit the axis of the spring 15 to prevent the spring 15 from deforming left and right. The maximum compression and maximum extension of the spring 15 do not exceed 50% of its own length to avoid long-term overload leading to plastic deformation.

[0019] The progressive pressure roller mechanism includes a mounting frame 8 rotatably connected to the frame 1 and several sets of pressure roller sections. These pressure roller sections are arranged sequentially from bottom to top, with the diameter of each pressure roller section decreasing progressively from bottom to top. Each pressure roller section includes a support rod 17 and a rotating wheel 18. Both the support rod 17 and the rotating wheel 18 are made of steel alloy. The top end of the support rod 17 is fixedly connected to the mounting frame 8, and the rotating wheel 18 is rotatably connected to the bottom end of the support rod 17. There are three sets of pressure roller sections arranged from bottom to top: a first pressure roller section 9, a second pressure roller section 10, and a third pressure roller section 11. The spacing between adjacent pressure roller sections is equal. The diameter of the first pressure roller section 9 is greater than... The outer diameter of the tank body is as follows: the diameter of the second pressure roller 10 is equal to the outer diameter of the tank body, and the diameter of the third pressure roller 11 is smaller than the outer diameter of the tank body. The difference between the outer diameter of the first pressure roller 9 and the outer diameter of the tank body is 0.5-1.5 times the thickness of the tank body, and the difference between the outer diameter of the third pressure roller 11 and the outer diameter of the tank body is 1.5-2 times the thickness of the tank body. The edges of the tank body are pressed step by step. The three sets of pressure rollers are staggered, and the mounting brackets 8 corresponding to the three sets of pressure rollers have different extension heights, so that the three sets of pressure rollers have different vertical heights for step-by-step sealing. The upper mold 2 is smaller than the diameter of the third pressure roller set, which is slightly smaller than the diameter of the upper mold 2, so that the upper mold 2 can drive the bottom of the tank to move vertically.

[0020] A through hole is provided at the end of the support rod 17 away from the mounting bracket 8. A bolt is provided on the rotating wheel 18. The bolt passes through the through hole and is fixed by a nut. Disc springs 12 are provided between the bolt and the support rod 17, and between the support rod 17 and the nut. Utilizing the elastic buffering characteristics of the disc springs 12, the rotating wheel 18 and the support rod 17 are designed as an elastic connection structure. The disc springs 12 can absorb instantaneous impact force through changes in compression. When there are slight fluctuations in the thickness of the metal material or when encountering local hard points, the disc springs 12 compensate for pressure changes through deformation, avoiding tank deformation caused by rigid extrusion, while reducing wear on the pressure roller and extending the equipment life.

[0021] The control device 16 is electrically connected to the vacuum pump 5 and the servo motor 6. The control device 16 includes a PLC controller, a touch screen, and several buttons. Once the program is set initially, it can be automatically controlled. During processing, the vacuum pump 5 is turned on first, and the bottom and body of the can are fixed on the upper mold 2 and the lower mold 3, respectively. After the equipment is started, the mounting frame 8 drives the three sets of pressure rollers to work. At this time, the servo motor 6 starts and drives the lower mold 3 and the can to move upward through the ball screw 7. The can body contacts the bottom of the can, and the three sets of pressure rollers reinforce the can body and the bottom of the can in sequence until they are fixed. The interval time of the stroke path is set. When the time expires, the servo motor 6 is driven to rotate in the opposite direction. An external switch can also be set for the processing operator to operate. The lower mold 3 drives the processed can body to move downward, and also gradually drives the upper mold 2 back to the initial state. The vacuum pump 5 stops working and the sealed can body and bottom of the can are taken out. By setting a cycle program, high-efficiency production can be achieved.

[0022] Working principle: When in use, place the bottom of the can under the upper mold 2 and the can body on the lower mold 3. Start the vacuum pump 5 through the control device 16. The vacuum pump 5 draws a vacuum to the upper mold 2 and the lower mold 3 through the gas supply pipe 4 and the vent hole 13 respectively. Use atmospheric pressure to firmly fix the bottom of the can on the upper mold 2 and fix the can body on the lower mold 3. The servo motor 6 drives the ball screw 7 to rotate, which drives the lower mold 3 and the can body to move upward. During the upward movement of the can, its edge successively contacts the rotating wheels 18 of the first pressure roller 9, the second pressure roller 10, and the third pressure roller 11 of the progressive pressure roller mechanism. The pressure of the rotating wheels 18 on the edge of the can gradually increases. At the same time, the disc spring 12 adaptively adjusts the pressure according to the characteristics of the can material to avoid excessive pressure causing deformation of the can. After the sealing is completed, the servo motor 6 drives the ball screw 7 to rotate in the opposite direction, which drives the lower mold 3 and the processed metal can to move downward, release the vacuum adsorption, and remove the metal can to complete one processing step.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An adjusting mechanism for a metal can bottom sealing device, comprising a frame, wherein an upper mold for fixing the can bottom and a lower mold for fixing the can body are provided on the frame, characterized in that: The frame is equipped with a fixing mechanism, an axial moving mechanism, a progressive pressure roller mechanism, and a control device; The fixing mechanism includes two gas supply pipes and a vacuum pump. One end of each gas supply pipe is respectively mounted on the upper mold and the lower mold, and the other end of the gas supply pipe is connected to the vacuum pump. The axial movement mechanism is used to drive the movement of the lower mold. The axial movement mechanism includes a servo motor and a ball screw. The lower mold is fixedly connected to the screw nut of the ball screw. The progressive pressure roller mechanism includes a mounting frame rotatably connected to the frame and several sets of pressure rollers. The sets of pressure rollers are arranged sequentially from bottom to top, and the diameter of the pressure rollers decreases from bottom to top. Each pressure roller includes a support rod and a rotating wheel. The top end of the support rod is fixedly connected to the mounting frame, and the rotating wheel is rotatably connected to the bottom end of the support rod. The control device is electrically connected to the vacuum pump and the servo motor, respectively.

2. The adjusting mechanism of the metal can bottom sealing device according to claim 1, characterized in that: The pressure roller section is arranged in three groups from bottom to top, namely the first pressure roller section, the second pressure roller section, and the third pressure roller section. The distance between adjacent pressure roller sections is equal. The diameter of the first pressure roller section is larger than the outer diameter of the tank body, the diameter of the second pressure roller section is equal to the outer diameter of the tank body, and the diameter of the third pressure roller section is smaller than the outer diameter of the tank body.

3. The adjusting mechanism of the metal can bottom sealing device according to claim 2, characterized in that: The support rod has a through hole at the end away from the mounting frame. A bolt is provided on the rotating wheel. The bolt passes through the through hole and is fixed by a nut. Disc springs are provided between the bolt and the support rod, and between the support rod and the nut.

4. The adjusting mechanism of the metal can bottom sealing device according to claim 3, characterized in that: The upper mold and the lower mold are provided with several ventilation holes on the side that are close to each other, and the air supply pipes are respectively inserted into the upper mold and the lower mold and the ventilation holes are connected.

5. The adjusting mechanism of the metal can bottom sealing device according to claim 2, characterized in that: The frame is equipped with a telescopic rod, and the upper mold is fixedly connected to the bottom end of the telescopic rod. The telescopic rod is fitted with springs at both ends that are fixedly connected to the frame and the upper mold respectively. The spring force is less than the vacuum adsorption force when the upper mold fixes the bottom of the tank, but greater than the weight of the upper mold.

6. The adjusting mechanism of the metal can bottom sealing device according to claim 5, characterized in that: The control device includes a PLC controller, a touch screen, and several buttons.

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