Automatic pressing equipment and forming process for multiple layers of arc-shaped rubber sheets with different diameters

Abstract

The invention discloses automatic press-fit equipment and a forming process for multiple layers of arc-shaped rubber sheets with different diameters, and relates to the field of press-fit forming of multiple layers of rubber, and the press-fit equipment comprises a suction cup mechanical arm, a pressing device and a conveying device; the conveying device is installed below the downward pressing device, and the conveying device and the downward pressing device are both within the contactable range of the mechanical arm. The pressing device comprises a compressed air connector, a rotatable pressing rod and a transmission device connected with the pressing rod, an air hole is formed in the bottom of the pressing rod, compressed air is filled into the pressing rod through the compressed air connector, and compressed airflow is sprayed out from the air hole in the bottom of the pressing rod; the pressing rod is driven by rotation of the transmission device to rotate, the airflow makes contact with the whole arc area of the to-be-pasted rubber sheet in the rotating process of the pressing rod, and all-directional pressing of the rubber sheet is achieved. The automatic press-fit equipment is simple in required equipment, low in cost and capable of achieving automatic press-fit forming of multiple layers of arc-shaped rubber sheets with different diameters, and the production precision is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of multi-layer rubber compression molding, and in particular to automatic compression equipment and molding process for multi-layer arc-shaped rubber sheets with different diameters. Background Art

[0002] The multi-layer rubber module commonly used in modular sealing systems is a product that can easily match penetrations of different diameters and is easy to install. The number and size of rubber sheets in the multi-layer rubber module vary according to different specifications.

[0003] At present, in the production process of laminating multi-layer arc-shaped rubber sheets, especially for rubber sheets of different numbers and sizes, the method of manually assembling each piece and then pressing them by hand is generally adopted. However, the above traditional manual piece-by-piece assembly method has the disadvantages of low precision and low output; at the same time, the product has high requirements on dimensional precision. Since manual operation has too many uncertainties, manual assembly can no longer meet its precision requirements; the current existing technology usually uses pressing rods of different diameters to press rubber sheets of different diameters, and there are too many pressing rollers required. At the same time, different pressing rollers are suitable for rubber sheets of different materials. Before laminating, it is necessary to select a suitable pressing roller, which increases a lot of selection and adjustment costs.

[0004] Utility model patent CN 216658997 U "A pressing device for processing rubber products" discloses a pressing device for processing rubber products, which presses rubber products through the coordination of pressure rollers and gears. However, the above-mentioned pressing device is only suitable for the flat pressing of a single rubber, and cannot press multiple layers of rubber sheets, nor can it achieve the unique arc-shaped pressing of rubber sheets. Compared with air pressure lamination, which can ensure uniform force on the rubber sheets during the pressing process, the coordination of pressure rollers and gears is prone to local contact deformation of the pressure rollers and rubber sheets. Summary of the invention

[0005] In view of this, the present invention provides automatic pressing equipment and molding process for multi-layer arc-shaped rubber sheets with different diameters. The automatic pressing equipment is used to realize automatic pressing and molding of multi-layer arc-shaped rubber sheets, aiming to solve the problems in the prior art of too many tooling sets required for pressing multi-layer rubber sheets and low precision of manual lamination.

[0006] An automatic laminating device for multi-layer arc-shaped rubber sheets of different diameters, the laminating device comprising a suction cup mechanical arm, a pressing device and a conveying device; the conveying device is installed below the pressing device, and the conveying device and the pressing device are both within the contact range of the suction cup mechanical arm;

[0007] The pressing device includes a compressed air interface, a pressing rod and a transmission device. The bottom of the pressing rod is provided with a single row or multiple air holes. Compressed air is filled into the pressing rod through the compressed air interface, and the compressed air is ejected from the air holes at the bottom of the pressing rod to achieve the pressing of the bottom of the rubber sheet; the pressing rod rotates with the transmission device to press the rubber sheet in all directions.

[0008] Furthermore, the suction cup robot arm includes a robot arm and a suction device, the suction device is installed on the robot arm, and the robot arm drives the suction device to automatically grasp and move the rubber sheet.

[0009] Furthermore, the pressing device also includes a rotating motor, which is connected to a transmission device. The rotating motor drives the transmission device to operate, thereby realizing the rotation of the pressing rod.

[0010] Furthermore, the upper part of the pressing rod is a hollow rectangular block, and the lower part is a hollow rod; the diameter of the pressing rod is smaller than the arc diameter of the smallest rubber sheet in the multi-layer rubber sheets.

[0011] Furthermore, the transmission device includes a rotating connecting plate and a limiting device, and the limiting device is fixed on the rotating connecting plate to realize the rotation and limiting action of the pressing rod.

[0012] Furthermore, the limiting device includes a rotating shaft and a limiting shaft, the limiting shaft is two hollow semi-cylinders, and the two hollow semi-cylinders are fixedly connected so that the rotating shaft can be clamped inside the limiting shaft.

[0013] Furthermore, the conveying device includes an electric device, a conveying part and a pressing tool; the electric device is connected to the pressing tool through the conveying part, driving the conveying part and the pressing tool to move along the direction of the slide rail.

[0014] The automatic forming process of multi-layer arc-shaped rubber sheets with different diameters includes the following steps:

[0015] S1: The conveying device drives the pressed workpiece to move along the slide rail until the pressed workpiece is moved to the bottom of the pressing device. At this time, the axis of the pressing rod and the axis of the pressed workpiece are in the same plane.

[0016] S2: The suction cup robot arm absorbs and grabs the single-layer rubber sheet to the top of the pressed workpiece;

[0017] S3: When the pressing device performs the pressing operation, the pressing rod moves downward to squeeze the single-layer rubber sheet to the bottom of the pressed workpiece;

[0018] S4: The compressed air interface fills the press rod with gas, and the air flows out from the air holes at the bottom of the press rod, which helps the rubber press sheet to better fit the bottom of the pressed workpiece;

[0019] S5: The rotary motor drives the pressing rod to rotate, and air is ejected through the air holes at the bottom of the pressing rod to achieve all-round pressing of the rubber sheet;

[0020] S6: The pressing device moves upward, the pressing rod returns to the normal position, and step S2 is continued;

[0021] S7: After the above steps are repeated until the lamination of the multiple layers of rubber sheets is completed, the conveying device drives the pressed workpiece to move along the direction of the slide rail, and then step S1 is continued.

[0022] Furthermore, in step S4, the conveying speed of the compressed air is adjusted to achieve the lamination of rubber sheets of different diameters and specifications.

[0023] Furthermore, according to the different diameters of the arc-shaped rubber sheets, when each layer of the rubber sheets is pressed, the number and size of the pores on the pressing rod used are different.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1) The equipment required by the present invention is simple and low in cost. The automatic pressing and forming of multi-layer arc-shaped rubber sheets can be achieved only by an integrated device consisting of a pressing workbench, a suction cup mechanical arm, a pressing device and other components. The operation is simple and easy to implement;

[0026] 2) The automatic pressing device of the present invention adopts a pressing rod with air holes, and utilizes the pressure of compressed air flow to press the rubber layer, thereby avoiding errors and damage caused by mechanical and manual methods. At the same time, there is no need to replace the pressing rod. The pressing operation of multiple rubber layers of different specifications and sizes can be achieved by simply adjusting the compressed air delivery speed.

[0027] 3) The present invention can realize the mass production of multi-layer arc-shaped rubber sheets on a large scale by only adjusting the motor speed at the start-up before the pressing operation, thereby freeing up labor and increasing production efficiency. At the same time, machines are suitable for replacing manual labor, greatly improving production accuracy, and obtaining high-precision multi-layer arc-shaped rubber sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of a multi-layer rubber module product of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the pressing device of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the pressing rod of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the conveying device of the present invention;

[0032] Figure 5 This is a schematic diagram of the rolling path of the pressing rod of the present invention;

[0033] Figure 6 This is a schematic diagram of the blowing path of the first displacement of the pressure rod of the present invention;

[0034] Figure 7 It is a schematic diagram of the second displacement blowing path of the pressing rod of the present invention.

[0035] Reference numerals:

[0036] Pressing device 1, compressed air interface 11, pressing rod 12, transmission device 13, rotating connecting plate 131, limiting device 132, rotating shaft 1321, limiting shaft 1322; rotating motor 14; conveying device 2, electric device 21, conveying motor 211, screw rod 212; conveying part 22, slide rail bottom plate 221, slide rail 222, conveying plate 223, buckle 2231; pressing tool 23, pressing workpiece 231, tool bottom plate 232. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The descriptions of "first", "second", etc. mentioned in the embodiments of the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] At present, in the production process of laminating multi-layer arc-shaped rubber sheets, especially for rubber sheets of different quantities and sizes, the method of manually assembling each piece and then pressing them together by hand is generally adopted. However, the above traditional manual piece-by-piece assembly method has the disadvantages of low precision and low output. At the same time, the product has high requirements on dimensional precision. Since manual operation has too many uncertainties, manual assembly can no longer meet its accuracy requirements.

[0039] In view of this, the present invention provides an automatic pressing device for multi-layer arc-shaped rubber sheets of different diameters, including a suction cup robot arm, a pressing device 1 and a conveying device 2, wherein the conveying device 2 is installed below the pressing device 1, and the suction cup robot arm is flexibly installed near the conveying device 2 and the pressing device 1, so that the conveying device 2 and the pressing device 1 are both within the contact range of the suction cup robot arm.

[0040] The suction cup robot arm includes a robot arm and a suction device, which is installed on the robot arm. The robot arm drives the suction device to absorb and move the rubber sheet. The suction device includes a metal rod and an air suction pipeline, wherein the metal rod is long and has multiple small holes. The suction generated by the small holes absorbs the sheet rubber onto the metal rod; then the robot arm drives the metal rod to move above the pressed workpiece 231 in the conveying device 2 to realize automatic grasping and moving of the rubber sheet; the above-mentioned suction cup robot arm has high versatility in absorbing and moving the rubber sheet, and is suitable for rubber sheets of various sizes and specifications.

[0041] The pressing device 1 includes a compressed air interface 11, a pressing rod 12, a transmission device 13 and a rotating motor 14; the pressing rod 12 is connected to the rotating motor 14 through the transmission device 13, and one end of the pressing rod 12 away from the transmission device 13 is connected to the compressed air interface 11;

[0042] The entire pressing device 1 is connected to the corresponding displacement device. The displacement device can drive the pressing device 1 to perform longitudinal displacement through a motor, a screw rod, etc. to achieve the pressing operation. The existing technology can be used to achieve the longitudinal movement of the entire pressing device 1 through the displacement device, which will not be elaborated here.

[0043] The two ends of the pressing rod 12 are respectively connected to the compressed air interface 11 and the transmission device 13. Specifically, the upper part of the pressing rod 12 is a hollow rectangular block, and the lower part is a hollow rod. The diameter of the pressing rod 12 is selected from the arc diameter of the smallest rubber sheet in the multi-layer rubber module, which is convenient for the pressing rod 12 to press the uppermost rubber sheet; the rectangular block structure of the upper part of the pressing rod 12 can limit the large-scale rotation of the pressing rod 12 and improve the pressing accuracy; the hollow rod structure of the lower part of the pressing rod 12 is in line with the shape of the pressing workpiece 231, so that the rubber sheet is more closely fitted during the pressing process;

[0044] One end of the pressing rod 12 is sealedly connected to a compressed air interface 11, and the other end of the pressing rod 12 is sealedly connected to a transmission device 13. Compressed air is filled into the pressing rod 12 through the compressed air interface 11. The bottom of the pressing rod 12 has one or more exhaust holes. The diameter and number of the air holes depend on the different specifications and sizes of the arc rubber sheet products. For example, the pressed rubber sheet needs to be in a sheet shape with a diameter of 30 mm. At this time, the length of the air hole at the bottom of the pressing rod 12 is 70 mm, and an exhaust hole is set for every 45° arc surface, and there are 5 to 8 air holes in a row.

[0045] During the pressing operation, after the pressing rod 12 presses the rubber sheet and contacts the bottom of the pressing workpiece 231, compressed air is filled into the pressing rod 12 through the compressed air interface 11, and the compressed air flow is ejected from the air hole at the bottom of the pressing rod 12. The pressing of rubber sheet layers of different sizes can be achieved by adjusting the compressed air delivery speed. According to Bernoulli's principle, the greater the flow rate, the smaller the pressure at the position: as the flow rate increases, when the air flow is ejected from the air hole at high speed, the pressure below the air hole will decrease, forming a downward pressure difference, and the pressure of the compressed air flow is used to press the single-layer rubber sheet into the pressing workpiece 231 to achieve the pressing operation of the rubber layer.

[0046] The transmission device 13 includes a rotating connecting plate 131 and a limiting device 132. The limiting device 132 and the rotating motor 14 are fixed on both sides of the rotating connecting plate 131. The rotating motor 14 drives the transmission device 13 to move, thereby realizing the rotation of the pressing rod 12; the limiting device 132 includes a rotating shaft 1321 and a limiting shaft 1322. The limiting shaft 1322 is two hollow semi-cylinders, and the two hollow semi-cylinders are fixedly connected by bolts so that the rotating shaft 1321 can be clamped inside the limiting shaft 1322. The rotating motor 14 converts electrical energy into power, and realizes the rotational movement of the rotating shaft 1321 through the rotating connecting plate 131. At the same time, due to the clamping of the limiting shaft 1322, it is transmitted to the pressing rod 12 and converted into a working radius with higher precision, thereby improving the pressing precision of the pressing rod 12; as the rotating motor 14 rotates, the airflow in the bottom air hole of the pressing rod 12 is ejected to press the rubber sheet in all directions.

[0047] The conveying device 2 includes an electric device 21, a conveying part 22 and a pressing tool 23; the electric device 21 is connected to the pressing tool 23 through the conveying part 22, and the electric device 21 drives the conveying part 22 and the pressing tool 23 to move along the slide rail 222, thereby realizing mass production of multi-layer arc-shaped rubber sheets;

[0048] The electric device 21 includes a transmission motor 211 and a screw rod 212. The transmission motor 211 and the screw rod 212 are connected to convert the rotational motion of the magnetic coil inside the transmission motor 211 into a linear motion in the direction of the screw rod 212.

[0049] The conveying part 22 is arranged above the electric device 21, and the conveying part 22 is moved along the direction of the slide rail 222 by the electric device 21. The conveying part 22 includes a slide rail bottom plate 221, a slide rail 222 and a conveying plate 223. The bottom of the slide rail bottom plate 221 is used to fix the electric device 21, and the top is used to fix the slide rail 222. Buckles 2231 are arranged around the lower part of the conveying plate 223. The conveying plate 223 is fixedly connected to the slide rail 222 by the buckles 2231, so as to drive the conveying plate 223 to move along the slide rail 222.

[0050] The pressing tool 23 is fixed on the conveying plate 223, and the movement of the conveying plate 223 drives the pressing tool 23 to move along the slide rail 222. At the same time, the pressing tool 23 is located at a corresponding position below the pressing rod 12 to realize the pressing operation of the rubber sheet. The pressing tool 23 includes a pressing workpiece 231 and a tool base plate 232. The pressing workpiece 231 is evenly arranged on the tool base plate 232. The tool base plate 232 is fixed on the conveying plate 223. The pressing tool 23 and the conveying part 22 perform relative static motion, that is, the conveying plate 223 drives the pressing workpiece 231 to move along the slide rail 222, thereby realizing large-scale batch production of multi-layer arc-shaped rubber sheets.

[0051] Through the above automatic pressing equipment, the multi-layer arc-shaped rubber sheet automatic pressing and forming process is then carried out:

[0052] S1: When performing the pressing operation, the conveying device 2 drives the pressed workpiece 211 to move along the slide rail 222 until the pressed workpiece 231 is moved to directly below the pressing rod 12 of the pressing device 1. At this time, the axis of the pressing rod 12 and the axis of the pressed workpiece 231 are in the same plane;

[0053] S2: The suction cup robot arm grabs the single-layer rubber sheet to the top of the pressed workpiece 211;

[0054] S3: When the pressing device 1 performs the pressing operation, the pressing rod 12 moves downward to squeeze the single-layer rubber sheet to the bottom of the pressed workpiece 231; see the attached Figure 5 , the pressing rod 12 moves vertically downward to squeeze the single-layer rubber sheet to the bottom axis point O of the pressed workpiece 231; then, the pressing rod 12 rolls slightly in the left and right directions from the bottom axis point O of the pressed workpiece 231, and the specific rolling path is: point O-point A-point O-point B, preforming the single-layer rubber sheet, so that the bottom center of the single-layer rubber sheet is firmly attached, and at the same time, it also prevents the single-layer rubber sheet from warping when the subsequent pressing rod 12 is blowing gas.

[0055] S4: After the preforming is completed, the pressing rod 12 is moved upward by 1 to 2 mm, and the compressed air interface 1 is used to fill gas into the pressing rod 12. The air flow is ejected from the air holes at the bottom of the pressing rod 12 to assist the rubber sheet to better fit the bottom of the pressed workpiece 231. The pressing of rubber sheets of different sizes and specifications can be achieved by adjusting the delivery speed of the compressed air. A row or more exhaust holes are used to blow the rubber sheet over a large area, and the line contact of the pressing roller in the prior art is converted into a large-area contact between the air flow and the pressed rubber sheet, which reduces the time required for pressing multiple layers of rubber sheets and greatly improves the pressing efficiency. At the same time, the pressure of the compressed air flow is used to tighten the single-layer rubber sheet and fix the rubber sheet to the bottom axis of the pressed workpiece 231. The pressure of the compressed air flow also avoids direct contact of the pressing rod 12 with the rubber sheet, and also avoids scratches, breakage and local contact deformation of the rubber sheet that may occur during the pressing process.

[0056] S5: The rotating motor 14 drives the pressing rod 12 to rotate, and air is ejected through the air holes at the bottom of the pressing rod 12 to achieve all-round lamination of the rubber sheet;

[0057] Specifically, the pressing rod 12 repeatedly performs left displacement and right displacement after the above preforming, wherein the left displacement includes a first left displacement and a second left displacement, and the right displacement includes a first right displacement and a second right displacement;

[0058] First leftward displacement: the pressing rod 12 is controlled by the rotary motor 14 to rotate to the left to the point A1, which is 1 / 2 of the height of the left side of the pressed workpiece 231, and then returns to the point O, the center point of the axis of the pressed workpiece 231. The movement path of the pressing rod 12 is: point O - point A1 - point O;

[0059] First rightward displacement: the pressing rod 12 is controlled by the rotary motor 14 to rotate to the right to the 1 / 2 point B1 of the right side height of the pressed workpiece 231 and then returns to the axis center point O of the pressed workpiece 231. The movement path of the pressing rod 12 is: point O - point B1 - point O;

[0060] Second leftward displacement: Continue to control the pressing rod 12 to rotate from the axis center point O to the left through the rotating motor 14. The pressing rod 12 rotates to the highest point A2 on the left side of the pressed workpiece 231 and then returns to the center point O. The movement path of the pressing rod 12 is: point O - point A2 - point O;

[0061] Second rightward displacement: Continue to control the pressing rod 12 to rotate from the axis center point O to the right through the rotating motor 14. The pressing rod 12 rotates to the highest point B2 on the right side of the pressed workpiece 231 and then returns to the center point O. The movement path of the pressing rod 12 is: point O - point B2 - point O.

[0062] During the rotation of the pressing rod 12, air is ejected from the air holes at the bottom, and is blown along the displacement path passed through, thereby achieving all-round fitting of the rubber sheet. Furthermore, by designing the rotation path of the pressing rod 12, there is no need to use a pressing roller for repeated rolling as in the prior art, which greatly shortens the working path of the pressing rod 12 and improves the pressing efficiency.

[0063] S6: After the lamination of a single-layer rubber sheet is completed, the pressing device 1 moves upward, the pressing rod 12 returns to the original position, and returns to execute the operation of the S2 robotic arm; since the circular arc diameter, size and specification of each layer of rubber sheet pressed in the multi-layer rubber module are different, the rotation rate parameters, the number of pores and the size of pores of the pressing rod 12 can be changed to adapt to rubber sheets of different diameters without replacing the pressing rod 12. Specifically, when the diameter of the rubber sheet is less than 10 mm, the rotation rate of the pressing rod is 30° / s; when the diameter of the rubber sheet is between 10 mm and 40 mm, the rotation rate of the pressing rod is 15° / s; when the diameter of the rubber sheet is greater than 40 mm, the rotation rate of the pressing rod is 10° / s; the present invention performs pre-forming and airflow blowing by using a pressing rod 12 with an adjustable rotation rate, thereby realizing the tightening and lamination of multiple layers of rubber sheets with different diameters.

[0064] S7: After the lamination of the multiple rubber sheets is completed by repeating the above steps, the conveying device 2 drives the laminating workpiece 231 to move along the slide rail 222, and then continues to execute step S1.

[0065] Use a rubber pressing rod 12 with air holes at the bottom: the length of the air hole at the bottom of the pressing rod 12 is 70 mm, an air hole is set for each 45° arc surface, and there are 5 to 8 air holes in a row; combine the previous pressing parameter adjustment to realize the assembly and pressing of multiple layers of arc-shaped rubber, wherein the pressing efficiency of the automatic pressing equipment is 2.5s / piece, and it only takes 25s to complete a product of 10 pieces;

[0066] Manual pressing of multiple layers of rubber sheets takes an average of about 2 minutes. The use of automatic pressing equipment can greatly improve production efficiency, which is about 5 times that of manual operation. The rubber sheets are grabbed and placed by a suction cup robot arm, and its matching accuracy with the pressed workpiece 231 is much higher than that of manual operation. The height difference of each layer of rubber sheet of the pressed product can be controlled within 0.6mm.

[0067] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. Automatic lamination equipment for multi-layer arc-shaped rubber sheets with different diameters, characterized in that: The pressing device comprises a suction cup mechanical arm, a pressing device (1) and a conveying device (2); the conveying device (2) is installed below the pressing device (1), and both the conveying device (2) and the pressing device (1) are within the contact range of the suction cup mechanical arm; The pressing device (1) comprises a compressed air interface (11), a pressing rod (12) and a transmission device (13); a single row or multiple air holes are provided at the bottom of the pressing rod (12); compressed air is filled into the pressing rod (12) through the compressed air interface (11), and the compressed air flow is ejected from the air holes at the bottom of the pressing rod (12) to achieve pressing of the bottom of the rubber sheet; the pressing rod (12) performs all-round pressing of the rubber sheet as the transmission device (13) rotates.

2. The lamination device according to claim 1, characterized in that: The suction cup mechanical arm comprises a mechanical arm and a suction device, wherein the suction device is mounted on the mechanical arm, and the mechanical arm drives the suction device to automatically grasp and move the rubber sheet.

3. The lamination device according to claim 1, characterized in that: The pressing device (1) further comprises a rotating motor (14), wherein the rotating motor (14) is connected to the transmission device (13), and the rotating motor (14) drives the transmission device (13) to operate, thereby realizing the rotation of the pressing rod (12).

4. The lamination device according to claim 1, characterized in that: The upper part of the pressing rod (12) is a hollow rectangular block, and the lower part is a hollow rod; the diameter of the pressing rod (12) is smaller than the arc diameter of the smallest rubber sheet in the multi-layer rubber sheet.

5. The lamination device according to claim 1, characterized in that: The transmission device (13) comprises a rotating connecting plate (131) and a limiting device (132); the limiting device (132) is fixed on the rotating connecting plate (131) to realize the rotation and limiting actions of the pressing rod (12).

6. The lamination device according to claim 5, characterized in that: The limiting device (132) comprises a rotating shaft (1321) and a limiting shaft (1322). The limiting shaft (1322) is two hollow semi-cylinders. The two hollow semi-cylinders are fixedly connected so that the rotating shaft (1321) can be clamped inside the limiting shaft (1322).

7. The lamination device according to claim 1, characterized in that: The conveying device (2) comprises an electric device (21), a conveying part (22) and a pressing tool (23); the electric device (21) is connected to the pressing tool (23) via the conveying part (22), and drives the conveying part (22) and the pressing tool (23) to move along the direction of the slide rail (222).

8. An automatic forming process for multi-layer arc-shaped rubber sheets of different diameters, using the laminating device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The conveying device (2) drives the pressed workpiece (231) to move along the slide rail (222) until the pressed workpiece (231) is moved to the bottom of the pressing device (1). At this time, the axis of the pressing rod (12) and the axis of the pressed workpiece (231) are in the same plane; S2: The suction cup robot arm sucks and grabs the single-layer rubber sheet to the top of the pressed workpiece (231); S3: When the pressing device (1) performs the pressing operation, the pressing rod (12) moves downward to squeeze the single-layer rubber sheet to the bottom of the pressed workpiece (231); S4: The compressed air interface (11) fills the pressing rod (12) with gas, and the air flow is ejected from the air holes at the bottom of the pressing rod (12), thereby assisting the rubber pressing sheet to better fit the bottom of the pressing workpiece (231); S5: The rotating motor (14) drives the pressing rod (12) to rotate, and air is ejected through the air holes at the bottom of the pressing rod (12), thereby achieving full-scale pressing of the rubber sheet; S6: the pressing device (1) moves upward, the pressing rod (12) returns to the normal position, and step S2 is continued; S7: After the lamination of the multiple layers of rubber sheets is completed by repeating the above steps, the conveying device (2) drives the laminating workpiece (231) to move along the direction of the slide rail (222), and then continues to execute step S1.

9. The molding process according to claim 8, characterized in that: In step S4, the conveying speed of the compressed air is adjusted to achieve the pressing of rubber sheets of different diameters and specifications.

10. The molding process according to claim 8, characterized in that: According to the different diameters of the arc-shaped rubber sheets, when each layer of the rubber sheets is pressed, the number and size of the air holes on the pressing rod (12) used are different.

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