Automatic die clamping device with limiting device

Abstract

The utility model relates to the field of hydraulic machines, in particular to an automatic die clamping device with a limiting device. Comprising an oil cylinder, an air cylinder and a limiting device, the oil cylinder is located on the front side of the air cylinder, and the limiting device is located on one side of the air cylinder and is an integrated limiting device or a split limiting device. The device has the advantages that the structure is simple, the operation is convenient, the device can be suitable for dies of different sizes, whether the oil cylinder reaches a clamping station accurately or not is detected, and the oil cylinder is limited not to exceed the clamping station.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic presses, and in particular to an automatic mold clamping device with a limiting device. Background Technology

[0002] Patent application number 202211209821.7, entitled "A Direct-Push Mold Clamp Structure," discloses a direct-push mold clamp, including a hydraulic cylinder, a direct-push device, a guide fixing, a guide groove, and a pneumatic cylinder. The pneumatic cylinder is inlet air, and its piston rod moves forward, driving the hydraulic cylinder through the guide groove and into the T-slot of the upper slide block on the press. When the hydraulic cylinder reaches the clamping position, the hydraulic cylinder seat moves upward, pressing the upper mold onto the upper mold seat. After the upper and lower mold seats close and the workpiece is processed, the upper mold seat returns to its initial position, and the hydraulic cylinder seat moves downward. At this time, a mold changing operation can be performed. The pneumatic cylinder drives the piston rod to retract, driving the hydraulic cylinder through the T-slot and guide groove of the upper slide block on the press. A detection switch detects the current position of the hydraulic cylinder. After the detection switch confirms that the hydraulic cylinder has exited the upper mold seat, the upper mold can be clamped again after mold changing.

[0003] However, the aforementioned direct-push mold clamping device is only suitable for molds of one size and cannot be used for molds of multiple different sizes. Furthermore, this structure can only detect whether the hydraulic cylinder has exited the mold and cannot limit the clamping position of the hydraulic cylinder.

[0004] Therefore, this utility model proposes an automatic mold clamping device with a limiting device, including a hydraulic cylinder, a pneumatic cylinder and a limiting device, which can be applied to molds of various sizes. This mold clamping device can not only detect whether the hydraulic cylinder has exited the mold, but also detect whether the hydraulic cylinder has accurately reached the clamping position through the limiting device, and limit the hydraulic cylinder from exceeding the clamping position through the limiting device. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing an automatic mold clamping device with a limiting device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic mold clamping device with a limiting device includes a hydraulic cylinder, a pneumatic cylinder, and a limiting device. The hydraulic cylinder is located in front of the pneumatic cylinder, and the limiting device is either an integrated limiting device or a separate limiting device. The integrated limiting device is located between the hydraulic cylinder and the pneumatic cylinder, and the separate limiting device is located on the side of the pneumatic cylinder.

[0008] Furthermore, the hydraulic cylinder includes a hydraulic cylinder piston rod and a hydraulic cylinder barrel, and the pneumatic cylinder includes a pneumatic cylinder piston rod and a pneumatic cylinder barrel.

[0009] Further, a flange is fixed to the front side of the cylinder barrel. One end of the cylinder piston rod passes through the center of the flange, and the other end is fixedly connected to the side surface of the connecting block. The other side surface of the connecting block is fixedly connected to the side surface of the oil cylinder piston rod.

[0010] Further, the integral type limiting device includes a support one and a proximity switch one. The support one is in an "L" shape. The short side part of the "L" shape is used for mechanical limiting. A round hole is provided on each of the left and right sides of the long side part of the "L" shape. The proximity switch one is fixedly penetrated through the round hole on the left side of the support one. One end of the cylinder piston rod is fixedly penetrated through the round hole on the right side of the support one.

[0011] Further, the split type limiting device includes a support two, a support three and a proximity switch two. The left view of the support two is in an "L" shape. A pair of bolt holes two are provided on the short side of the "L" shape for fixedly connecting the support two to the side surface of the connecting block. There is a 90° bending plate one at the top of the long side of the "L" shape, and the bending plate one is perpendicular to the side surface of the support two.

[0012] Further, the left view of the support three is in a "T" shape. There is a 90° bending plate two on the bottom side of the vertical bar part of the "T" shape. Two round holes are symmetrically provided in the middle of the bending plate two for fixing the support three on one side of the T-shaped groove of the hydraulic press workbench. A strip hole is provided on the horizontal bar part of the "T" shape. The proximity switch two is penetrated and connected in the strip hole.

[0013] Further, there are two proximity switch twos, and the positions of the two proximity switch twos in the strip hole can be manually adjusted.

[0014] Further, the side surface of the connecting block is in an "L" shape, and the front surface is in a "convex" shape.

[0015] Further, a pair of bolt holes one are vertically penetrated through the flange for fixing the cylinder barrel directly above the T-shaped groove of the hydraulic press workbench.

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] 1. It can be applicable to molds of different sizes;

[0018] 2. The oil cylinder can be detected by the limiting device whether it accurately reaches the clamping station, and the oil cylinder can be restricted by the limiting device not to exceed the clamping station, ensuring the safety of the equipment;

[0019] 3. The structure is simple, the operation is convenient, and the maintenance is easy, improving the work efficiency and reducing the maintenance cost;

[0020] 4. The structure of the limiting device is diversified, and it can be an integral type limiting device or a split type limiting device. Description of the Drawings

[0021] Figure 1 A three-dimensional structural diagram of the present invention with an integrated limiting device;

[0022] Figure 2 A three-dimensional structural diagram of an integrated limiting device;

[0023] Figure 3 A three-dimensional structural diagram of the present invention with a split-type limiting device;

[0024] Figure 4 This is a three-dimensional structural diagram of a split-type limiting device.

[0025] In the diagram: 1. Hydraulic cylinder; 11. Hydraulic cylinder piston rod; 12. Hydraulic cylinder barrel; 2. Pneumatic cylinder; 21. Pneumatic cylinder piston rod; 22. Pneumatic cylinder barrel; 3. Connecting block; 4. Flange; 5. Integrated limit device; 51. Bracket 1; 52. Proximity switch 1; 6. Split limit device; 61. Bracket 2; 62. Bracket 3; 63. Proximity switch 2. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Example 1, as shown in the accompanying drawings of the specification. Figure 1 , Figure 3 As shown, an automatic mold clamping device with a limiting device includes a hydraulic cylinder 1, a pneumatic cylinder 2 and a limiting device. The hydraulic cylinder 1 is located in front of the pneumatic cylinder 2. The limiting device is either an integrated limiting device 5 or a separate limiting device 6. The integrated limiting device 5 is located between the hydraulic cylinder 1 and the pneumatic cylinder 2, and the separate limiting device 6 is located on the side of the pneumatic cylinder 2.

[0029] The hydraulic cylinder 1 includes a hydraulic cylinder piston rod 11 and a hydraulic cylinder barrel 12, and the pneumatic cylinder 2 includes a pneumatic cylinder piston rod 21 and a pneumatic cylinder barrel 22.

[0030] A flange 4 is fixed to the front side of the cylinder barrel 22. One end of the cylinder piston rod 21 passes through the center of the flange 4, and the other end is fixedly connected to the side of the connecting block 3. The other side of the connecting block 3 is fixedly connected to the side of the oil cylinder piston rod 11.

[0031] In this embodiment, flange 4 fixes cylinder barrel 22 directly above the T-slot of the hydraulic press worktable. When cylinder piston rod 21 extends, it pushes connecting block 3 and cylinder piston rod 11 to slide within the T-slot, sending cylinder 1 to the clamping position. When cylinder piston rod 21 retracts, it drives connecting block 3 and cylinder piston rod 11 to slide within the T-slot, removing cylinder 1 from the clamping position. The limiting device has various structures, including an integrated limiting device 5 or a split limiting device 6. Both have the advantages of simple structure, convenient operation, applicability to molds of different sizes, detection of whether the cylinder accurately reaches the clamping position, and restriction of the cylinder from exceeding the clamping position.

[0032] Example 2, as shown in the accompanying drawings of the specification. Figure 1 , Figure 2 As shown, the integrated limiting device 5 includes a bracket 51 and a proximity switch 52. The bracket 51 is L-shaped, with the short side of the L-shape used for mechanical limiting and a round hole on each side of the long side of the L-shape. The proximity switch 52 is fixed through the round hole on the left side of the bracket 51, and one end of the cylinder piston rod 21 is fixed through the round hole on the right side of the bracket 51.

[0033] Based on Embodiment 1, the cylinder piston rod 21 drives the integrated limiting device 5, connecting block 3, and oil cylinder 1 to reciprocate together. During the process of the cylinder piston rod 21 sending the oil cylinder 1 to the clamping position, the proximity switch 52 can detect whether the oil cylinder 1 has reached the clamping position. The proximity switch 52 determines whether the oil cylinder 1 has reached the clamping position by sensing the mold. When the proximity switch 52 moves forward under the push of the cylinder piston rod 21 until it senses the mold, the oil cylinder 1 has reached the clamping position. At this time, the proximity switch 52 sends a signal to the hydraulic control system, which controls the cylinder piston rod 21 to stop extending, ensuring that the oil cylinder 1 can accurately reach the clamping position. Simultaneously, the "L"-shaped short side of the bracket 51 is used for mechanical limiting, restricting the distance between the proximity switch 52 and the mold, thereby protecting the proximity switch 52 from being damaged by the cylinder piston rod 21.

[0034] Since the proximity switch 52 directly determines whether the hydraulic cylinder 1 has reached the clamping position by sensing the position of the mold, this clamping device can be used for molds of different sizes without any operation.

[0035] Example 3, as shown in the accompanying drawings of the specification. Figure 3 , Figure 4As shown, the split type limit device 6 includes a second support 61, a third support 62 and a second proximity switch 63. The left view of the second support 61 is in an "L" shape. A pair of second bolt holes are provided on the short side of the "L" shape for fixedly connecting the second support 61 to the side of the connecting block 3. There is a 90° bending plate 1 at the top of the long side of the "L" shape, and the bending plate 1 is perpendicular to the side of the second support 62 and opposite to it.

[0036] The left view of the third support 62 is in a "T" shape. There is a 90° bending plate 2 at the bottom of the vertical bar part of the "T" shape. Two circular holes are symmetrically arranged in the middle of the bending plate 2 for fixing the third support 62 to one side of the T-shaped groove of the hydraulic press workbench. A strip hole is provided on the horizontal bar part of the "T" shape, and the second proximity switch 63 is connected through the strip hole.

[0037] There are two second proximity switches 63, and the positions of the two second proximity switches 63 in the strip hole can be manually adjusted.

[0038] The side of the connecting block 3 is in an "L" shape, and the front is in a "convex" shape.

[0039] A pair of first bolt holes are provided through the upper and lower parts of the flange 4 for fixing the cylinder barrel 22 directly above the T-shaped groove of the hydraulic press workbench.

[0040] On the basis of Embodiment 1, the cylinder piston rod 21 drives the second support 61 in the split type limit device 5, the connecting block 3 and the oil cylinder 1 to move reciprocally. When the cylinder piston rod 21 sends the oil cylinder 1 to the clamping station, the second proximity switch 63 can detect whether the oil cylinder 1 has reached the clamping station and whether the oil cylinder 1 has withdrawn from the mold.

[0041] The second proximity switch 63 judges the position of the oil cylinder 1 by sensing the top of the bending plate 1 of the second support 61. When the cylinder piston rod 21 pushes the oil cylinder 1 forward until the top of the bending plate 1 is opposite to the left second proximity switch 63, the oil cylinder 1 has reached the clamping station, and the left second proximity switch 63 sends a signal to the hydraulic control system, and the hydraulic control system controls the cylinder piston rod 21 to stop extending. The cylinder piston rod 21 drives the oil cylinder 1 to retract until the top of the bending plate 1 is opposite to the right second proximity switch 63. At this time, the oil cylinder 1 is in the state of withdrawing from the clamping station, and the right second proximity switch 63 sends a signal to the hydraulic control system, and the hydraulic control system controls the cylinder piston rod 21 to stop retracting.

[0042] When changing to a mold of a different size, it is only necessary to adjust the position of the left proximity switch 2 63 within the slot of bracket 3 62 before use. The specific operation procedure is as follows: First, determine the clamping position of the hydraulic cylinder 1 according to the mold size, then determine the position of bracket 2 61. The position where the top of the bending plate 1 of bracket 2 61 faces bracket 3 62 is the fixed position of the left proximity switch 2 63. Simply loosen the nut fixing the left proximity switch 2 63, move the left proximity switch 2 63 to the fixed position, and then tighten the nut to complete the adjustment of the left proximity switch 2 63.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic die clamp with a limiting device, comprising a hydraulic cylinder (1), an air cylinder (2) and a limiting device, the hydraulic cylinder (1) is located in front of the air cylinder (2), characterized in that: The limiting device is an integrated limiting device (5) or a split limiting device (6), the integrated limiting device (5) is located between the oil cylinder (1) and the air cylinder (2), and the split limiting device (6) is located on the side of the air cylinder (2).

2. The automatic die gripper with a positioner according to claim 1, wherein: The oil cylinder (1) comprises an oil cylinder piston rod (11) and an oil cylinder barrel (12), and the air cylinder (2) comprises an air cylinder piston rod (21) and an air cylinder barrel (22).

3. The automatic die clamp of claim 2, wherein: A flange (4) is fixed to the front side of the air cylinder barrel (22), one end of the air cylinder piston rod (21) penetrates the center of the flange (4), and the other end is fixedly connected to the side of a connecting block (3), and the other side of the connecting block (3) is fixedly connected to the side of the oil cylinder piston rod (11).

4. The automatic die clamp of claim 1, wherein: The integrated limiting device (5) comprises a bracket one (51) and a proximity switch one (52), the bracket one (51) is in the shape of "L", the short side part of the "L" shape is used for mechanical limiting, the long side part of the "L" shape is provided with a circular hole on the left and right, the proximity switch one (52) is fixedly penetrated on the circular hole on the left of the bracket one (51), and one end of the air cylinder piston rod (21) is fixedly penetrated in the circular hole on the right of the bracket one (51).

5. The automatic die clamp of claim 1, wherein: The split limiting device (6) comprises a bracket two (61), a bracket three (62) and a proximity switch two (63), the bracket two (61) is in the shape of "L" in the left view, a pair of bolt holes two are arranged on the short side of the "L" shape and are used for fixedly connecting the bracket two (61) to the side of the connecting block (3), and a 90° bending plate one is arranged at the top of the long side of the "L" shape, and the bending plate one is vertically opposite to the side of the bracket two (62).

6. The automatic die clamp of claim 5, wherein: The bracket three (62) is in the shape of "T" in the left view, a 90° bending plate two is arranged at the bottom side of the vertical bar part of the "T", the bending plate two is symmetrically provided with two circular holes in the middle and is used for fixing the bracket three (62) to the side of a T-shaped groove of a hydraulic machine workbench, a strip-shaped hole is arranged on the horizontal bar part of the "T", and the proximity switch two (63) is connected to the strip-shaped hole.

7. The automatic die clamp of claim 6, wherein: The proximity switch two (63) is two, and the positions of the two proximity switch two (63) in the strip-shaped hole can be manually adjusted.

8. The automatic mold gripper with a position limiting device according to claim 3, characterized in that: The side of the connecting block (3) is in the shape of "L", and the front is in the shape of "convex".

9. The automatic die clamp of claim 3, wherein: A pair of bolt holes one are arranged on the flange (4) and are used for fixedly connecting the air cylinder barrel (22) to the T-shaped groove of the hydraulic machine workbench.

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