A metal sheet oil press with positioning and feeding mechanism

Abstract

The present invention discloses a metal sheet oil hydraulic press with a positioning and feeding mechanism, which relates to the technical field of oil hydraulic presses. The present invention comprises a mounting frame, wherein the mounting frame is fixedly connected to a lower mounting plate, wherein the lower mounting plate is slidably connected to a movable mounting plate, wherein a hydraulic push rod is installed in the mounting frame, wherein the telescopic end of the hydraulic push rod is fixedly connected to a ring die, wherein the lower mounting plate is fixedly connected to a punch, wherein the movable mounting plate is fixedly connected to a connecting plate, wherein the connecting plate is fixedly connected to an upper die, wherein the lower mounting plate is fixedly connected to symmetrically distributed hydraulic telescopic parts, wherein the telescopic end of the hydraulic telescopic parts is fixedly connected to a sliding shell, wherein the sliding shell is slidably connected to an L-shaped frame, wherein the symmetrically distributed L-shaped frames are all fixedly connected to U-shaped frames. The present invention positions the metal sheet by driving the U-shaped frame to move when the upper die moves downward, without the need for manual positioning, thereby shortening the time required for workers to place the metal sheet, thereby shortening the interval time between two stampings, improving work efficiency, and ensuring the quality of the finished product.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic presses, and in particular to a metal plate hydraulic press with a positioning and feeding mechanism. Background Art

[0002] A hydraulic stretching machine is a device that uses hydraulic technology to perform stretching operations on mechanical parts or structural parts. It is widely used in pressure vessel manufacturing and metal processing. When working, the hydraulic stretching machine extrude and stretch thin metal sheets into a set shape through the cooperation of the upper die and the lower die. When processing thin metal sheets, it is necessary to use the positioning columns on the surface of the lower die to position the metal sheets. There are two existing positioning methods. One is two positioning columns located on one side of the lower die and with a spacing less than the diameter of the metal sheet. The metal sheet is pushed between the two positioning columns to complete the positioning of the metal sheet. The second is four positioning columns located in the middle of the lower die. The diameter of the circle surrounded by the four positioning columns is equal to the diameter of the metal sheet. The metal sheet can be placed between the four positioning columns. The second method requires the metal sheet to be pre-positioned when placed, which takes a long time and is inefficient. Therefore, the first method is usually used to position the metal sheet.

[0003] In order to ensure the working efficiency of the hydraulic stretching machine when stretching thin metal plates, an intermittent start-up method is usually adopted. If the interval between two stampings is short, the workers will have a short time to position the thin metal plates. At the same time, the thin metal plates have a small mass and the friction between them and the lower die is small. If an accidental touch occurs when the worker loses contact with the thin metal plates, the position of the thin metal plates will move. At this time, the workers have no time to reposition the metal plates, resulting in the metal plates ultimately not being in the correct position. As a result, the metal plates are unevenly stressed in the circumferential direction when being stretched, and the wall thickness of the stretched finished products is uneven, resulting in low quality of the finished products. If the interval between the two stampings is extended, the work efficiency will be low. Summary of the invention

[0004] The invention provides a metal plate oil press with a positioning and feeding mechanism to overcome the disadvantage that the existing oil press stretching machine cannot take both working efficiency and finished product rate into consideration during operation.

[0005] The technical solution of the present invention is: a metal sheet oil hydraulic press with a positioning and feeding mechanism, comprising a mounting frame, the mounting frame is fixedly connected to a lower mounting plate, the lower mounting plate is slidably connected to a movable mounting plate through a sliding rod, the lower mounting plate is fixedly connected to an upper mounting plate through a sliding rod, a hydraulic push rod is installed on the upper mounting plate, and the telescopic end of the hydraulic push rod is fixedly connected to the movable mounting plate, a feeding mechanism is installed on the mounting frame, a hydraulic push rod is installed in the mounting frame, the telescopic end of the hydraulic push rod is fixedly connected to a ring die slidably connected to the lower mounting plate, the lower mounting plate is fixedly connected to a convex die slidably connected to the ring die, and the A connecting plate is fixedly connected to one side of the movable mounting plate close to the lower mounting plate, an upper mold is fixedly connected to one side of the connecting plate close to the lower mounting plate, symmetrically distributed hydraulic telescopic parts are fixedly connected to one side of the lower mounting plate close to the movable mounting plate, a spring is installed in the hydraulic telescopic parts, a sliding shell is fixedly connected to the telescopic end of the hydraulic telescopic parts, the sliding shell is slidably connected to an L-shaped frame, and a tension spring is fixedly connected between the two, U-shaped frames are fixedly connected to the opposite sides of the symmetrically distributed L-shaped frames, the U-shaped frames are extrusion-matched with the ring mold, and a power component for providing power to the symmetrically distributed hydraulic telescopic parts is arranged on the upper mounting plate.

[0006] The cam is provided with a plurality of camshafts, each of which ...

[0007] Furthermore, it also includes an extrusion assembly arranged on the connecting plate, the extrusion assembly is used to extrude the metal plate into a straight state, the extrusion assembly includes a multi-stage spring telescopic rod, the multi-stage spring telescopic rod is fixedly connected to the side of the connecting plate close to the lower mounting plate, the telescopic end of the multi-stage spring telescopic rod is fixedly connected to an air cylinder, a mounting piece is sealingly and slidably connected inside the air cylinder, the mounting piece is fixedly connected to an elastic ring on the side close to the lower mounting plate, the elastic ring is fixedly connected to an extrusion plate in contact with the mounting piece, the elastic ring is fixedly connected to an annular airbag, the annular airbag is extruded and matched with the mounting piece, the mounting piece, the elastic ring and the extrusion plate cooperate to form a transfer chamber, the transfer chamber is connected to the annular airbag, and the mounting piece is provided with an air supply assembly for providing gas to the annular airbag.

[0008] Furthermore, the air supply assembly includes a first sealing ball, an I-shaped hole and an L-shaped flow channel are provided in the mounting piece, the air storage cylinder cooperates with the mounting piece to form an air storage chamber, the I-shaped hole connects the air storage chamber with the transfer chamber, the first sealing ball is slidably connected to the I-shaped hole, a spring is fixedly connected between the first sealing ball and the mounting piece, the first sealing ball cooperates with the I-shaped hole for sealing, a second sealing ball is slidably connected in the L-shaped flow channel, the second sealing ball cooperates with the L-shaped flow channel for sealing, a spring is fixedly connected between the second sealing ball and the mounting piece, symmetrically distributed extrusion columns are fixedly connected in the air storage cylinder, the first sealing ball and the second sealing ball are respectively extruded and cooperated with adjacent extrusion columns, a through hole communicating with the outside is provided on the side of the air storage cylinder away from the mounting piece, a one-way valve is installed in the through hole of the air storage cylinder, and gas is stored in the air storage chamber, the I-shaped hole, the transfer chamber and the annular airbag.

[0009] Furthermore, an annular cavity communicating with the L-shaped flow channel is arranged in the mounting member, and exhaust holes distributed in an annular shape and communicating with the annular cavity are arranged in the mounting member.

[0010] Furthermore, the elastic coefficient of the spring adjacent to the first sealing ball is smaller than the elastic coefficient of the spring adjacent to the second sealing ball, so as to control the flow path of the gas.

[0011] Furthermore, a ring-shaped limiting member is slidably connected inside the mounting member, and a tension spring is fixedly connected between the limiting member and the mounting member. The elastic coefficient of the tension spring is smaller than the elastic coefficient of the annular airbag. The limiting member is used to shield the annular airbag and increase the extrusion force of the annular airbag on the metal plate.

[0012] Furthermore, the maximum diameter of the circle formed by the annularly distributed limiting members is smaller than the inner diameter of the upper die.

[0013] Furthermore, a positioning block is slidably connected inside the extrusion plate, the positioning block is magnetically matched with the mounting piece, the air storage cylinder is fixedly connected with a positioning column that is sealingly and slidably connected to the mounting piece, and the positioning column is extrusion-matched with the positioning block.

[0014] Furthermore, a rubber pad is provided on a side of the positioning block away from the air storage cylinder. The friction coefficient of the rubber pad is greater than the friction coefficient of the annular airbag and is used to fix the positioned metal plate.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: the present invention positions the metal plate by moving the transmission U-shaped frame when the upper mold moves downward, without the need for manual positioning, thereby shortening the time required for workers to place the metal plate, thereby shortening the interval time between two stampings, improving work efficiency, and ensuring the quality of the finished product. At the same time, the loading mechanism replaces manual labor, shortening the time interval between two loadings, and improving work efficiency.

[0016] The two U-shaped frames are moved closer to each other to center the metal plate before the upper die contacts the ring die. The pressure in the hydraulic telescopic part is controlled by the pressure valve to avoid deformation of the metal plate in the process of pushing the metal plate to move and position. This ensures that the metal plate can remain in the correct position after positioning. The metal plate is evenly stressed in the circumferential direction during the stretching process, ensuring the quality of the finished product. At the same time, it reduces local wear on the die and increases the service life of the die.

[0017] The bent metal plate is squeezed by the extrusion plate to make it straight, and the metal plate is positioned in cooperation with the U-shaped frame, thereby improving the applicability of the metal plate positioning and the accuracy of the metal plate positioning result.

[0018] The deformation of the elastic ring and the annular airbag prevents the metal plate from moving relative to the elastic ring and the annular airbag, thereby reducing the friction of the metal plate when it moves, making it easier to position the metal plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the mounting frame, the lower mounting plate and the movable mounting plate of the present invention;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the ring die, the punch die and the upper die of the present invention;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the L-shaped frame, liquid storage member and stretching member of the present invention;

[0023] Figure 5It is a three-dimensional structural cross-sectional view of the liquid storage member, the follower plate and the extrusion plate of the present invention;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the gas storage cylinder and the mounting member of the present invention;

[0025] Figure 7 It is a three-dimensional structural cross-sectional view of the gas storage cylinder and the mounting member of the present invention;

[0026] Figure 8 It is a three-dimensional structural cross-sectional view of the mounting member and the annular airbag of the present invention;

[0027] Fig. 9 It is a three-dimensional structural cross-sectional view of the elastic ring, the extrusion plate and the annular airbag of the present invention.

[0028] Figure numerals: 1-mounting frame, 2-lower mounting plate, 3-movable mounting plate, 4-upper mounting plate, 5-feeding mechanism, 6-ring die, 7-punch, 8-connecting plate, 9-upper die, 10-hydraulic telescopic member, 11-sliding shell, 12-L-shaped frame, 13-U-shaped frame, 14-liquid storage member, 15-follow-up plate, 16-extrusion plate, 161-extrusion chamber, 162-residual liquid chamber, 17-pressure valve, 18-stretching member, 19-multi- Stage spring telescopic rod, 20-air storage cylinder, 21-mounting part, 211-air storage chamber, 22-elastic ring, 23-extrusion plate, 231-transfer chamber, 24-annular air bag, 241-I-shaped hole, 242-L-shaped flow channel, 243-annular chamber, 244-exhaust hole, 25-first sealing ball, 26-second sealing ball, 27-extrusion column, 28-one-way valve, 29-limiting part, 30-positioning block, 31-positioning column. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0030] When a hydraulic stretching machine is used to stretch a metal plate, the metal plate is manually placed on the surface of the lower die, and the positioning column on the surface of the lower die is used to position the metal plate. In order to ensure the working efficiency of the hydraulic stretching machine, an intermittent start-up method is usually adopted. If the interval between two stampings is short, the worker will have a short time to position the thin metal plate. At the same time, the thin metal plate has a small mass and the friction between it and the lower die is small. If an accidental touch occurs when the worker loses contact with the thin metal plate, the position of the thin metal plate will move. At this time, the worker has no time to reposition the metal plate, resulting in the metal plate ultimately not being in the correct position. As a result, the metal plate is unevenly stressed in the circumferential direction when being stretched, and the wall thickness of the finished product is uneven, resulting in low quality of the finished product. At the same time, due to the uneven circumferential force on the metal plate, the mold will be unevenly stressed in the circumferential direction when stretched, causing uneven circumferential wear of the mold and reducing the service life of the mold; if the interval between two stampings is extended, the work efficiency will be reduced.

[0031] Example 1: A metal sheet hydraulic press with a positioning and feeding mechanism, see Figure 1-Figure 4 , including a mounting frame 1, a lower mounting plate 2 is fixedly connected to the upper side of the mounting frame 1, the lower mounting plate 2 is connected to a movable mounting plate 3 by sliding up and down through four sliding rods, the lower mounting plate 2 is fixedly connected to an upper mounting plate 4 by four sliding rods, a hydraulic push rod is installed on the upper mounting plate 4, the telescopic end of the hydraulic push rod on the upper mounting plate 4 is fixedly connected to the movable mounting plate 3, a feeding mechanism 5 is installed on the mounting frame 1, the feeding mechanism 5 is an existing device (composed of an electric slide rail, a suction cup and an electric push rod), which is used to continuously supply metal plates to the mounting frame 1, a hydraulic push rod is installed in the mounting frame 1, the telescopic end of the hydraulic push rod in the mounting frame 1 is fixedly connected to a ring die 6, the ring die 6 is slidably connected to the lower mounting plate 2, a punch 7 is fixedly connected to the middle part of the upper side of the lower mounting plate 2, the punch 7 is slidably connected to the ring die 6 up and down, the movable mounting plate A connecting plate 8 is fixedly connected to the middle of the lower side of the lower mounting plate 2, an upper die 9 is fixedly connected to the lower side of the connecting plate 8, two hydraulic telescopic parts 10 symmetrically distributed on the left and right are fixedly connected to the upper side of the lower mounting plate 2, a spring is installed in the hydraulic telescopic part 10, a sliding shell 11 is fixedly connected to the telescopic end of the hydraulic telescopic part 10, an L-shaped frame 12 is slidably connected to the sliding shell 11 up and down, a tension spring is fixedly connected between the L-shaped frame 12 and the adjacent sliding shell 11, and U-shaped frames 13 are fixedly connected to the opposite sides of the two L-shaped frames 12, an annular inclined surface is provided on the upper side of the ring die 6, and the U-shaped frame 13 is extruded and matched with the annular inclined surface of the ring die 6, so as to keep the U-shaped frame 13 and the ring die 6 in a fitting state, so as to facilitate the positioning of the thin metal plate, and a power component for providing power to the two hydraulic telescopic parts 10 is provided on the lower side of the upper mounting plate 4.

[0032] See also Figure 2-Figure 5The power assembly includes a liquid storage member 14, which is fixedly connected to the lower side of the upper mounting plate 4. The upper part of the liquid storage member 14 is limited in the upper and lower parts and is sealed and slidably connected with a follower plate 15 and an extrusion plate 16. The follower plate 15 is located above the extrusion plate 16. The lower side of the extrusion plate 16 cooperates with the liquid storage member 14 to form an extrusion chamber 161. The upper side of the extrusion plate 16, the liquid storage member 14 and the lower side of the follower plate 15 cooperate to form a residual liquid chamber 162. The hydraulic telescopic member 10 is connected to the lower part of the liquid storage member 14 through a conduit. The extrusion chamber 161 and the residual liquid chamber 162 are both connected and cooperated with the two hydraulic telescopic members 10. Initially, the extrusion chamber 161 is connected to the two hydraulic telescopic members 10 respectively through two conduits. The distance from the lower side of the liquid storage member 14 to the connection position with the conduit is equal to the thickness of the surrounding side of the extrusion plate 16. The extrusion chamber 161 and the residual liquid chamber 162 are connected to the two hydraulic telescopic members 10. Hydraulic oil is stored in the cavity 162, the hydraulic telescopic member 10 and the adjacent conduits. A through hole connecting the extrusion cavity 161 and the residual liquid cavity 162 is provided in the middle of the extrusion disk 16. A pressure valve 17 is installed in the through hole of the extrusion disk 16. The pressure valve 17 is used to control the pressure of the hydraulic oil delivered to the two hydraulic telescopic members 10, that is, to control the force of the two U-shaped frames 13 clamping the metal plates. The sum of the elastic forces of the springs in the two hydraulic telescopic members 10 is less than the threshold value of the pressure valve 17. At the same time, the threshold value of the pressure valve 17 is less than the force required for the deformation of the metal plate. A stretching member 18 is fixedly connected to the lower side of the extrusion disk 16. The stretching member 18 is sealingly and slidably connected to the liquid storage member 14. A tension spring is fixedly connected between the stretching member 18 and the dynamic mounting plate 3. The lower side of the stretching member 18 is squeezed and matched with the dynamic mounting plate 3 to push the stretching member 18 to reset when the dynamic mounting plate 3 moves upward.

[0033] When the device is used to stretch a circular thin metal plate (hereinafter referred to as a metal plate) into a cylinder, the metal plate is first placed on the upper side of the ring die 6 through the feeding mechanism 5, and then the hydraulic push rod on the upper mounting plate 4 is started. The telescopic end of the hydraulic push rod on the upper mounting plate 4 extends out and drives the movable mounting plate 3 to move downward, and the movable mounting plate 3 drives the connecting plate 8 and the upper die 9 to move downward. The movable mounting plate 3 drives the stretching member 18 to move downward together through the tension spring, and the stretching member 18 drives the extrusion plate 16 to move downward. The extrusion plate 16 pushes the hydraulic oil in the extrusion chamber 161, so that the hydraulic oil enters the adjacent hydraulic telescopic member 10 through the adjacent conduit, and the telescopic end of the hydraulic telescopic member 10 contracts to compress the spring in the hydraulic telescopic member 10. The telescopic ends of the two hydraulic telescopic members 10 respectively drive the adjacent sliding shells 11 to move, so that the two sliding shells 11 are relative to each other. The two U-shaped frames 13 move closer to each other, and the sliding shell 11 drives the adjacent L-shaped frames 12 and U-shaped frames 13 to move. The U-shaped frame 13 contacts the annular inclined surface of the ring die 6, so that the U-shaped frame 13 drives the adjacent L-shaped frames 12 to move upward and stretches the tension springs adjacent to the L-shaped frames 12 (through the tension springs adjacent to the L-shaped frames 12, it is ensured that the U-shaped frame 13 is always in a fitted state when in contact with the ring die 6, and that the U-shaped frame 13 can push the metal plate to move). Finally, the two U-shaped frames 13 are in contact with the upper side of the ring die 6 and slide along the ring die 6. The two U-shaped frames 13 contact the metal plate placed on the ring die 6 in turn and push the metal plate to move. When the two U-shaped frames 13 are in contact with the metal plate, the metal plate and the two U-shaped frames 13 stop moving. At this time, the central axis of the metal plate coincides with the central axis of the ring die 6, and the positioning of the metal plate is completed.

[0034] As described above, during the downward movement of the upper mold 9, the transmission U-shaped frame 13 pushes the metal plate to move and position the metal plate. There is no need for workers to position the metal plate, which saves the time required for workers to place the metal plate, thereby shortening the interval between two stampings, improving work efficiency and ensuring the quality of the finished product.

[0035] When the extrusion plate 16 moves downward, the extrusion plate 16 drives the follower plate 15 to move downward through the hydraulic oil in the residual liquid chamber 162. After the U-shaped frame 13 stops moving, the stretching member 18 continues to drive the extrusion plate 16 to move downward. At this time, the hydraulic oil in the extrusion chamber 161 cannot enter the adjacent hydraulic telescopic member 10 through the adjacent conduit. As the extrusion plate 16 moves downward, the pressure of the hydraulic oil in the extrusion chamber 161 gradually increases until the pressure of the hydraulic oil in the extrusion chamber 161 is greater than the threshold of the pressure valve 17. The pressure valve 17 opens and releases the blockage of the through hole on the extrusion plate 16, so that the extrusion chamber 161 is connected with the residual liquid chamber 162. As the extrusion plate 16 moves downward, the hydraulic oil in the extrusion chamber 161 is released. The hydraulic oil enters the residual liquid chamber 162 through the through hole on the extrusion plate 16 (since the pressure of the hydraulic oil in the extrusion chamber 161 is equal to the threshold of the pressure valve 17, the hydraulic oil in the hydraulic telescopic member 10 cannot flow back to the extrusion chamber 161). In the process of the hydraulic oil entering the residual liquid chamber 162, the follower plate 15 stops moving until the extrusion plate 16 passes the connecting position between the liquid storage member 14 and the adjacent conduit, and the lower side of the extrusion plate 16 contacts the lower side of the liquid storage member 14 (at this time, the hydraulic telescopic member 10 is connected to the residual liquid chamber 162), the extrusion plate 16 stops moving, the pressure valve 17 is closed, and then the telescopic end of the hydraulic telescopic member 10 is reset under the action of its internal spring.

[0036] As the telescopic end of the hydraulic telescopic member 10 is reset, the hydraulic oil in the hydraulic telescopic member 10 is squeezed into the residual liquid chamber 162 through the adjacent conduit, and the hydraulic oil in the residual liquid chamber 162 pushes the follower plate 15 to move up and reset. During the reset process of the telescopic end of the hydraulic telescopic member 10, the adjacent sliding shells 11, L-shaped frame 12 and U-shaped frame 13 are driven to move, so that the two U-shaped frames 13 move away from each other and lose contact with the ring die 6. At this time, the L-shaped frame 12 moves downward under the action of the adjacent tension spring and resets relative to the adjacent sliding shell 11. Subsequently, the telescopic end of the hydraulic telescopic member 10, the sliding shell 11, the L-shaped frame 12 and the U-shaped frame 13 are reset together.

[0037] After the lower side of the extrusion disk 16 contacts the liquid storage member 14 and stops moving, as the movable mounting plate 3 moves downward, the movable mounting plate 3 loses contact with the two stretching members 18 and stretches the two adjacent tension springs. At the same time, the movable mounting plate 3 drives the upper die 9 to contact the upper side of the metal plate. At this time, the hydraulic push rod in the mounting frame 1 is started, and it drives the ring die 6 to move, so that the upper die 9 squeezes the periphery of the metal plate and moves downward together with the ring die 6. The extrusion pressure of the upper die 9 and the ring die 6 on the metal plate remains constant during the downward movement, and the punch 7 provides support for the middle part of the metal plate. The metal plate becomes a cylinder under the joint action of the ring die 6, the punch 7 and the upper die 9.

[0038] After the metal plate is stretched into a cylinder, the hydraulic push rod on the upper mounting plate 4 drives the movable mounting plate 3 to move upward, so that the tension spring of the movable mounting plate 3 is reset, and then the movable mounting plate 3 contacts the lower side of the stretching member 18 and pushes it upward, so that the stretching member 18 pushes the extrusion plate 16 to move upward, and the extrusion plate 16 squeezes the hydraulic oil in the residual liquid chamber 162 through the adjacent conduit into the adjacent hydraulic telescopic member 10, until the extrusion plate 16 passes through the connecting position between the liquid storage member 14 and the adjacent conduit, and the hydraulic telescopic member 10 is connected with the extrusion chamber 161. At this time, the extrusion plate 16 squeezes the hydraulic oil in the residual liquid chamber 162, so that the pressure of the hydraulic oil in the residual liquid chamber 162 gradually increases and reaches the threshold value of the pressure valve 17, and the hydraulic oil in the residual liquid chamber 162 is The pushed pressure valve 17 opens, and as the extrusion plate 16 moves upward, the hydraulic oil in the residual liquid chamber 162 enters the extrusion chamber 161 (at this time, the pressure of the hydraulic oil in the residual liquid chamber 162 is equal to the threshold of the pressure valve 17, and the pressure of the hydraulic oil in the extrusion chamber 161 is less than the elastic force of the spring in the hydraulic telescopic member 10), and the hydraulic oil in the hydraulic telescopic member 10 enters the extrusion chamber 161 through the adjacent conduit until the extrusion plate 16 is reset, and the pressure valve 17 is closed. At this time, the dynamic mounting plate 3 is reset, and the hydraulic push rod on the upper mounting plate 4 is closed. While the dynamic mounting plate 3 moves upward and resets, the hydraulic push rod in the mounting frame 1 pushes the ring die 6 to move upward and reset, and the hydraulic push rod in the mounting frame 1 is closed to complete the stretching of the metal plate.

[0039] When manufacturing a cylinder by stretching a thin metal plate, since the thin metal plate is usually punched out from a strip thin metal plate, and the strip thin metal plate is usually in a rolled shape when stored, the circular thin metal plate punched out from the strip thin metal plate is arc-shaped, that is, the projection of the circular thin metal plate on the horizontal plane is an ellipse. When two positioning columns are used to position the circular thin metal plate, as the circular thin metal plate contacts the two positioning columns, the center of the circular thin metal plate cannot be in the correct position, and the metal plate cannot be positioned by the existing positioning columns.

[0040] Example 2: Based on Example 1, please refer to Figure 6-Figure 9, and also includes an extrusion assembly arranged on the connecting plate 8, the extrusion assembly is used to extrude the metal plate into a straight state, the extrusion assembly includes a multi-stage spring telescopic rod 19, the multi-stage spring telescopic rod 19 is fixedly connected to the lower side of the connecting plate 8, the telescopic end of the multi-stage spring telescopic rod 19 is fixedly connected to an air storage cylinder 20, and the air storage cylinder 20 is sealed and slidably connected with a mounting member 21 up and down, and an elastic ring 22 is fixedly connected to the middle of the lower side of the mounting member 21, and the elastic ring 22 is made of elastic rubber. The lower side of the elastic ring 22 is fixedly connected to an extrusion plate 23, and the extrusion plate 23 and the mounting member The annular airbag 24 is pressed and matched with the mounting member 21 to limit the deformation of the annular airbag 24 toward the upper side. The elastic ring 22 limits the deformation of the annular airbag 24 toward the inner side, so that the annular airbag 24 is mainly deformed toward the outer side and the lower side. The lower side of the mounting member 21, the elastic ring 22 and the extrusion plate 23 cooperate to form a transfer chamber 231. The transfer chamber 231 is connected to the annular airbag 24, and a gas supply component for providing gas to the annular airbag 24 is provided in the mounting member 21.

[0041] See also Figure 7 and Figure 8 The air supply assembly includes a first sealing ball 25, an I-shaped hole 241 and an L-shaped flow channel 242 are provided in the mounting member 21, the air storage cylinder 20 cooperates with the upper side of the mounting member 21 to form an air storage chamber 211, the I-shaped hole 241 connects the air storage chamber 211 with the transfer chamber 231, the first sealing ball 25 is slidably connected in the I-shaped hole 241, a spring is fixedly connected between the first sealing ball 25 and the mounting member 21, the first sealing ball 25 and the I-shaped hole 241 are blocked and matched, initially, the first sealing ball 25 blocks the I-shaped hole 241 and forms a one-way valve connected from top to bottom, a second sealing ball 26 is slidably connected in the L-shaped flow channel 242, the second sealing ball 26 and the L-shaped flow channel 242 are blocked and matched, initially, the first sealing ball 25 blocks the I-shaped hole 241, a spring is fixedly connected between the second sealing ball 26 and the mounting member 21, the air storage cylinder Two extrusion columns 27 symmetrically distributed on the left and right are fixedly connected to the upper side of 20, and the first sealing ball 25 and the second sealing ball 26 are respectively extruded and matched with the adjacent extrusion columns 27 to push the first sealing ball 25 and the second sealing ball 26 to move downward, and together release the blockage of the I-shaped hole 241 and the L-shaped flow channel 242, so that the L-shaped flow channel 242 is connected with the I-shaped hole 241 through the air storage chamber 211. A through hole connected to the outside is provided on the right part of the upper side of the air storage cylinder 20, and a one-way valve 28 connected from top to bottom is installed in the through hole of the air storage cylinder 20. Gas is stored in the air storage chamber 211, the I-shaped hole 241, the transfer chamber 231 and the annular airbag 24, and the elastic coefficient of the adjacent spring of the first sealing ball 25 is smaller than the elastic coefficient of the adjacent spring of the second sealing ball 26, which is used to control the order of gas flowing into the I-shaped hole 241 and the L-shaped flow channel 242.

[0042] See also Figure 6-Figure 9An annular cavity 243 is provided in the mounting part 21, and the annular cavity 243 is communicated with the L-shaped flow channel 242. An annularly distributed exhaust holes 244 are provided in the mounting part 21, and the exhaust holes 244 are communicated with the annular cavity 243. The extension line of the central axis of the exhaust holes 244 finally contacts the lower side surface of the upper mold 9, so that the gas discharged from the exhaust holes 244 can clean the impurities adhered to the lower side surface of the upper mold 9.

[0043] See also Figure 8 and Fig. 9 A plurality of annularly distributed limiting members 29 are slidably connected inside the mounting member 21, and the limiting members 29 are L-shaped. A tension spring is fixedly connected between the limiting member 29 and the mounting member 21, and the elastic coefficient of the tension spring is smaller than the elastic coefficient of the annular airbag 24. The limiting member 29 is used to shield the annular airbag 24 and increase the extrusion pressure of the annular airbag 24 on the metal plate. The maximum diameter of the circle surrounded by the plurality of limiting members 29 is smaller than the inner diameter of the upper mold 9, so as to prevent the limiting member 29 from hindering the movement of the upper mold 9.

[0044] See also Fig. 9 A positioning block 30 is slidably connected to the middle part of the extrusion plate 23, and a rubber pad is arranged on the lower side of the positioning block 30. The friction coefficient of the rubber pad is greater than the friction coefficient of the annular airbag 24, which is used to fix the metal plate after positioning. The positioning block 30 is magnetically matched with the mounting member 21. Initially, the positioning block 30 is in contact with the lower side of the mounting member 21, and the air storage cylinder 20 is fixed with a positioning column 31. The positioning column 31 is sealingly and slidably connected to the mounting member 21 up and down, and the positioning column 31 is squeezed and matched with the positioning block 30.

[0045] After the feeding mechanism 5 places the metal plate on the upper side of the ring die 6, as the hydraulic push rod on the upper mounting plate 4 controls the dynamic mounting plate 3 to move downward, the dynamic mounting plate 3 drives the multi-stage spring telescopic rod 19 and all the upper parts to move downward together through the connecting plate 8, so that the extrusion plate 23 and the annular airbag 24 contact the upper side of the metal plate. At this time, the extrusion plate 23 stops moving, and the extrusion plate 23 pushes the mounting member 21 to stop moving. As the gas storage cylinder 20 continues to move downward, the gas in the gas storage chamber 211 is squeezed into the I-shaped hole 241, and the first sealing ball 25 is pushed downward, compressing the spring adjacent to the first sealing ball 25, so that the first sealing ball 25 releases the blockage of the I-shaped hole 241, and then the gas in the gas storage chamber 211 passes through the I-shaped hole 241 and the transfer chamber 231 and enters the annular airbag 24, so that the annular airbag 24 expands, so that the extrusion force of the annular airbag 24 on the metal plate is increased, and the metal plate is squeezed from a bent state to a straight state.

[0046] During the expansion of the annular airbag 24, the upper side and the inner side of the annular airbag 24 are squeezed by the mounting member 21 and the elastic ring 22 respectively, so the annular airbag 24 spreads around, and the annular airbag 24 drives several limiting members 29 to move and stretches the tension springs adjacent to the limiting members 29. The limiting members 29 continue to squeeze the upper side of the annular airbag 24, so that the annular airbag 24 continues to spread around as it expands, thereby increasing the contact area between the annular airbag 24 and the metal plate and improving the effect of squeezing the metal plate.

[0047] During the expansion of the annular airbag 24, the steps of Example 1 are repeated, and the two U-shaped frames 13 contact the metal plate in turn and push the metal plate to move. The metal plate drives the annular airbag 24 to deform by relying on the friction between it, the annular airbag 24 and the extrusion plate 23. At the same time, the metal plate drives the elastic ring 22 to deform through the extrusion plate 23, so that no relative displacement occurs between the metal plate, the extrusion plate 23 and the annular airbag 24. The deformation of the elastic ring 22 and the annular airbag 24 cancels the friction between the metal plate, the extrusion plate 23 and the annular airbag 24, reduces the wear of the metal plate during the movement, and facilitates the metal plate to be pushed and positioned by the U-shaped frame 13, while reducing the resistance of the metal plate when moving. Subsequently, after the two U-shaped frames 13 are in contact with the metal plate, the air storage cylinder 20 drives the positioning column 31 to contact the positioning block 30 and pushes The dynamic positioning block 30 moves downward and loses contact with the mounting part 21, so that the rubber pad on the positioning block 30 contacts the metal plate and fixes the metal plate. As the air cylinder 20 continues to move downward, the rubber pad of the positioning block 30 is compressed. At the same time, the air cylinder 20 drives the two extrusion columns 27 to contact the first sealing ball 25 and the second sealing ball 26 respectively, and push the first sealing ball 25 and the second sealing ball 26 downward, so that the second sealing ball 26 releases the blockage of the L-shaped flow channel 242. Subsequently, the gas in the annular airbag 24 passes through the air storage cavity 211, the transfer cavity 231 and the I-shaped hole 241 and enters the L-shaped flow channel 242, and enters the annular cavity 243 along the L-shaped flow channel 242. The gas in the annular cavity 243 is discharged to the outside through all the exhaust holes 244, and the gas discharged from the exhaust holes 244 cleans the impurities adhering to the lower side of the upper mold 9.

[0048] As the gas in the annular airbag 24 is gradually discharged, the annular airbag 24 is reset under the action of its own elasticity and the adjacent tension spring of the limit member 29. In the process of the gas in the annular airbag 24 being discharged, the step of resetting the U-shaped frame 13 in Example 1 is repeated to make the U-shaped frame 13 lose contact with the metal plate, thereby completing the positioning of the metal plate. As the dynamic mounting plate 3 continues to move downward, the spring in the multi-stage spring telescopic rod 19 is compressed until the metal plate is stretched, and the dynamic mounting plate 3 moves upward. The multi-stage spring telescopic rod 19 is first reset under the action of the spring therein. After the multi-stage spring telescopic rod 19 is reset, the telescopic end of the multi-stage spring telescopic rod 19 drives the gas cylinder 20 to move upward, and the mounting member 21 and the parts thereon temporarily remain stationary under the action of their own gravity. As the gas cylinder 20 moves upward, the one-way valve 28 opens and allows external gas to enter the gas storage chamber 211. Until the gas cylinder 20 is reset relative to the mounting member 21, the one-way valve 28 is closed, and the gas cylinder 20 drives the mounting member 21 to move upward.

[0049] As the gas cylinder 20 moves upward and the mounting member 21 remains stationary, the gas cylinder 20 drives the two extrusion columns 27 and the positioning column 31 to move upward together, and the first sealing ball 25 and the second sealing ball 26 move upward and reset under the action of adjacent springs. The first sealing ball 25 re-blocks the I-shaped hole 241, and the second sealing ball 26 re-blocks the L-shaped flow channel 242. At the same time, the positioning block 30 moves upward under the action of the magnetic attraction between it and the mounting member 21 and re-fits with the lower side of the mounting member 21. Subsequently, as the gas cylinder 20 drives the mounting member 21 to move upward, the elastic ring 22 drives the extrusion plate 23 to swing and reset under the action of its own elastic force, thereby completing the stretching of the bent metal plate.

[0050] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

[0051] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A metal sheet hydraulic press with a positioning and feeding mechanism, comprising a mounting frame (1), wherein the mounting frame (1) is fixedly connected to a lower mounting plate (2), the lower mounting plate (2) is slidably connected to a movable mounting plate (3) via a sliding rod, the lower mounting plate (2) is fixedly connected to an upper mounting plate (4) via a sliding rod, a hydraulic push rod is mounted on the upper mounting plate (4), and the telescopic end of the hydraulic push rod is fixedly connected to the movable mounting plate (3), a feeding mechanism (5) is mounted on the mounting frame (1), a hydraulic push rod is mounted inside the mounting frame (1), the telescopic end of the hydraulic push rod is fixedly connected to a ring die (6) slidably connected to the lower mounting plate (2), the lower mounting plate (2) is fixedly connected to a punch (7) slidably connected to the ring die (6), a connecting plate (8) is fixedly connected to a side of the movable mounting plate (3) close to the lower mounting plate (2), and an upper die (9) is fixedly connected to a side of the connecting plate (8) close to the lower mounting plate (2), characterized in that: It also includes symmetrically distributed hydraulic telescopic parts (10), the hydraulic telescopic parts (10) are fixedly connected to a side of the lower mounting plate (2) close to the movable mounting plate (3), a spring is installed in the hydraulic telescopic parts (10), the telescopic end of the hydraulic telescopic parts (10) is fixedly connected to a sliding shell (11), the sliding shell (11) is slidably connected to an L-shaped frame (12), and a tension spring is fixedly connected between the two, and the opposite sides of the symmetrically distributed L-shaped frames (12) are fixedly connected to U-shaped frames (13), and the U-shaped frames (13) are extrusion-matched with the ring die (6), and a power component for providing power to the symmetrically distributed hydraulic telescopic parts (10) is arranged on the upper mounting plate (4); The power assembly comprises a liquid storage component (14), the liquid storage component (14) being fixedly connected to a side of the upper mounting plate (4) close to the movable mounting plate (3), a follower plate (15) and an extrusion plate (16) being limited in position and sealed and slidably connected inside the liquid storage component (14), the follower plate (15) being located on a side of the extrusion plate (16) close to the upper mounting plate (4), the extrusion plate (16) and the liquid storage component (14) cooperating to form an extrusion chamber (161), the extrusion chamber (16), the liquid storage component (14) and the follower plate (15) cooperating to form a residual liquid chamber (162), the hydraulic telescopic component (10) being connected to the liquid storage component (14) via a conduit, the extrusion chamber (161) and the residual liquid chamber (162) are connected and matched with the symmetrically distributed hydraulic telescopic parts (10), the extrusion chamber (161), the residual liquid chamber (162), the hydraulic telescopic parts (10) and the adjacent conduits are all filled with hydraulic oil, the extrusion plate (16) is provided with a through hole connecting the extrusion chamber (161) and the residual liquid chamber (162), a pressure valve (17) is installed in the through hole of the extrusion plate (16), a stretching part (18) which is sealingly and slidably connected to the liquid storage part (14) is fixedly connected to the side of the extrusion plate (16) away from the follower plate (15), a tension spring is fixedly connected between the stretching part (18) and the movable mounting plate (3), and the stretching part (18) is extruded and matched with the movable mounting plate (3).

2. A metal sheet hydraulic press with a positioning and feeding mechanism according to claim 1, characterized in that: The invention also comprises an extrusion assembly arranged on the connecting plate (8), the extrusion assembly being used to extrude the metal plate into a straight state, the extrusion assembly comprising a multi-stage spring telescopic rod (19), the multi-stage spring telescopic rod (19) being fixedly connected to a side of the connecting plate (8) close to the lower mounting plate (2), the telescopic end of the multi-stage spring telescopic rod (19) being fixedly connected to an air storage cylinder (20), a mounting member (21) being sealingly and slidably connected inside the air storage cylinder (20), and an elastic ring (21) being fixedly connected to a side of the mounting member (21) close to the lower mounting plate (2). 22), the elastic ring (22) is fixedly connected to an extrusion plate (23) in contact with the mounting member (21), the elastic ring (22) is fixedly connected to an annular airbag (24), the annular airbag (24) is extruded and matched with the mounting member (21), the mounting member (21), the elastic ring (22) and the extrusion plate (23) cooperate to form a transfer cavity (231), the transfer cavity (231) is communicated with the annular airbag (24), and a gas supply component for providing gas to the annular airbag (24) is arranged in the mounting member (21).

3. A metal sheet oil press with a positioning and feeding mechanism according to claim 2, characterized in that: The air supply assembly comprises a first sealing ball (25); an I-shaped hole (241) and an L-shaped flow channel (242) are provided in the mounting member (21); the air storage cylinder (20) cooperates with the mounting member (21) to form an air storage chamber (211); the I-shaped hole (241) connects the air storage chamber (211) with the transfer chamber (231); the first sealing ball (25) is slidably connected in the I-shaped hole (241); a spring is fixedly connected between the first sealing ball (25) and the mounting member (21); the first sealing ball (25) is sealed and cooperated with the I-shaped hole (241); a second sealing ball (26) is slidably connected in the L-shaped flow channel (242); Two sealing balls (26) are sealed and matched with the L-shaped flow channel (242); a spring is fixedly connected between the second sealing ball (26) and the mounting member (21); symmetrically distributed extrusion columns (27) are fixedly connected in the gas storage cylinder (20); the first sealing ball (25) and the second sealing ball (26) are respectively extruded and matched with adjacent extrusion columns (27); a through hole communicating with the outside is provided on a side of the gas storage cylinder (20) away from the mounting member (21); a one-way valve (28) is installed in the through hole of the gas storage cylinder (20); and gas is stored in the gas storage cavity (211), the I-shaped hole (241), the transfer cavity (231) and the annular air bag (24).

4. The metal sheet oil press with a positioning and feeding mechanism according to claim 3, characterized in that: An annular cavity (243) communicating with the L-shaped flow channel (242) is provided in the mounting member (21), and exhaust holes (244) distributed in an annular pattern and communicating with the annular cavity (243) are provided in the mounting member (21).

5. The metal sheet hydraulic press with a positioning and feeding mechanism according to claim 3, characterized in that: The elastic coefficient of the spring adjacent to the first sealing ball (25) is smaller than the elastic coefficient of the spring adjacent to the second sealing ball (26), and is used to control the flow path of the gas.

6. The metal sheet oil press with a positioning and feeding mechanism according to claim 4, characterized in that: An annularly distributed limiting member (29) is slidably connected inside the mounting member (21), a tension spring is fixedly connected between the limiting member (29) and the mounting member (21), the elastic coefficient of the tension spring is smaller than the elastic coefficient of the annular airbag (24), and the limiting member (29) is used to shield the annular airbag (24) to increase the squeezing force of the annular airbag (24) on the metal plate.

7. The metal sheet oil press with a positioning and feeding mechanism according to claim 6, characterized in that: The maximum diameter of the circle formed by the annularly distributed limiting members (29) is smaller than the inner diameter of the upper die (9).

8. The metal sheet oil press with a positioning and feeding mechanism according to claim 6, characterized in that: A positioning block (30) is slidably connected inside the extrusion plate (23), the positioning block (30) is magnetically engaged with the mounting member (21), the gas storage cylinder (20) is fixedly connected with a positioning column (31) which is sealingly slidably connected to the mounting member (21), and the positioning column (31) is extrusion-engaged with the positioning block (30).

9. The metal sheet oil press with a positioning and feeding mechanism according to claim 8, characterized in that: A rubber pad is provided on a side of the positioning block (30) away from the air storage cylinder (20); the friction coefficient of the rubber pad is greater than the friction coefficient of the annular air bag (24), and is used to fix the positioned metal plate.

Images