A type of upper mold anti-fall structure

Abstract

This application relates to the field of upper mold technology, and more specifically to an upper mold anti-fall structure, comprising: an oil tank, a fixed mold base, a movable mold base, a lifting drive device, and an anti-fall structure. The fixed mold base is fixedly connected to the frame, and the movable mold base is lifted and mounted on the fixed mold base. The lifting drive device includes a main cylinder, a first piston, a first valve stem, a second cylinder, a second piston, and a second valve stem. The first piston is slidably disposed within the first cylinder and is divided into a first upper chamber and a first lower chamber. The second piston is slidably disposed within the second cylinder and is divided into a second upper chamber and a second lower chamber. The first valve stem is connected to the movable mold base and the first piston, and the second valve stem is connected to the movable mold base and the second piston. The anti-fall structure includes a first oil pipe and a normally closed solenoid valve. The two ends of the first oil pipe are respectively connected to the oil chamber and the first lower chamber. This utility model achieves the advantage of being able to lock at any height and being safer by having oil flow into the first lower chamber and providing support force to the first piston.

Description

Technical Field

[0001] This application relates to the field of upper mold technology, and more specifically to an upper mold anti-fall structure. Background Technology

[0002] A stamping die is a special process equipment used in cold stamping to process materials into parts. It includes a movable upper die and a fixed lower die.

[0003] There is a stamping die, such as Figure 1 As shown, the device includes an upper mold 90, a lower mold 91, a base 92, a pin 93, and an oil tank 94. The upper mold 90 includes an oil cylinder 901, a piston rod 902, an upper mold base 903, and a base 92. The oil tank 94, the upper mold base 903, and the lower mold 91 are all fixedly mounted on the base 92. The upper mold base 903 has several insertion holes 9031. The pin 93 is slidably disposed on the base 92. When the upper mold base 903 moves to its highest point, the pin 93 is directly opposite the insertion hole 9031. It should be noted that after processing a workpiece, the piston rod 902 moves upward and drives the upper mold base 903 to move upward to its highest point. The pin 93 is then inserted into the insertion hole 9031 to achieve mechanical anti-locking. However, since the height of the pin 93 is fixed, the upper mold base 903 can only be locked when it moves to the highest point. If the cylinder 901 has not moved to the highest point and a cylinder body rupture or other malfunction occurs, the upper mold base 903 may fall freely, creating a safety hazard.

[0004] Therefore, there is a need for a safer upper mold fall protection structure that can be locked at any height. Utility Model Content

[0005] The main objective of this application is to provide an upper mold anti-fall structure mounted on a machine frame. The upper mold anti-fall structure includes an oil tank, a fixed mold base, a movable mold base, a lifting drive device, and an anti-fall structure. The fixed mold base is fixedly connected to the machine frame. The movable mold base is ellipsably mounted on the fixed mold base. The fixed mold base is located between the oil tank and the movable mold base in the height direction. The lifting drive device includes a main cylinder assembly and two rapid cylinder assemblies. The main cylinder assembly includes a main cylinder body, a first piston, and a first valve stem. Each rapid cylinder assembly includes a second cylinder body, a second piston, and a second valve stem. The main cylinder body and the second cylinder body are both fixedly mounted on the fixed mold base. The main cylinder body has a first oil chamber, and the second cylinder body has a second piston. The body has a second oil chamber. The first piston is slidably disposed in the first oil chamber and divides the first oil chamber into a first upper chamber and a first lower chamber. The second piston is slidably disposed in the second oil chamber and divides the second oil chamber into a second upper chamber and a second lower chamber. The two ends of the first valve stem are respectively connected to the movable mold base and the first piston. The two ends of the second valve stem are respectively connected to the movable mold base and the second piston. The fall protection structure includes a first oil pipe and a normally closed solenoid valve. The two ends of the first oil pipe are respectively connected to the oil chamber and the first lower chamber. The normally closed solenoid valve normally closes the connection between the first oil pipe and the oil tank. The oil flows into the first lower chamber and provides support force to the first piston, achieving the advantage of being able to lock at any height and being safer.

[0006] Another objective of this application is to provide an upper mold anti-fall structure, wherein the oil tank is located at the top of the main cylinder and is fixedly connected to the main cylinder. The upper mold anti-fall structure also includes a flushing valve. When the flushing valve is opened or closed, the oil tank is connected to or disconnected from the first upper cavity. The connection between the oil tank and the main cylinder is achieved through the flushing valve.

[0007] To achieve at least one of the above-mentioned objectives, this application provides an upper mold anti-fall structure disposed on a frame, wherein the upper mold anti-fall structure includes:

[0008] One fuel tank; and

[0009] A fixed mold base, the fixed mold base being fixedly connected to the frame; and

[0010] A movable mold base, which is elliptically mounted on a fixed mold base, wherein the fixed mold base is located between the oil tank and the movable mold base in the height direction; and

[0011] A lifting drive device includes a main cylinder assembly and two rapid cylinder assemblies. The main cylinder assembly includes a main cylinder body, a first piston, and a first valve stem. Each rapid cylinder assembly includes a second cylinder body, a second piston, and a second valve stem. The main cylinder body and the second cylinder body are fixedly mounted on a fixed mold base. The main cylinder body has a first oil chamber, and the second cylinder body has a second oil chamber. The first piston is slidably disposed within the first oil chamber, dividing the first oil chamber into a first upper chamber and a first lower chamber. The second piston is slidably disposed within the second oil chamber, dividing the second oil chamber into a second upper chamber and a second lower chamber. The two ends of the first valve stem are respectively connected to the movable mold base and the first piston, and the two ends of the second valve stem are respectively connected to the movable mold base and the second piston.

[0012] A fall protection structure includes a first oil pipe and a normally closed solenoid valve. The two ends of the first oil pipe are respectively connected to the oil chamber and the first lower chamber. The normally closed solenoid valve normally closes the connection between the first oil pipe and the oil tank.

[0013] In one or more embodiments of this application, the oil tank is located at the top of the main cylinder and is fixedly connected to the main cylinder. The upper mold anti-fall structure also includes a flushing valve. When the flushing valve is opened or closed, the oil tank is connected to or disconnected from the first upper cavity.

[0014] In one or more embodiments of this application, the main cylinder body further has a pressurization channel, which is connected to the first upper cavity.

[0015] In one or more embodiments of this application, the rapid hydraulic cylinder assembly further includes two second oil pipes, two third oil pipes, and a distribution block. The distribution block has a first oil passage and a second oil passage. One end of each of the two second oil pipes is connected to both ends of the first oil passage, and the other end of each second oil pipe is connected to the second upper cavity on the corresponding rapid hydraulic cylinder assembly. One end of each of the two third oil pipes is connected to both ends of the second oil passage, and the other end of each third oil pipe is connected to the second lower cavity on the corresponding rapid hydraulic cylinder assembly. The first oil passage and the second oil passage are respectively connected to a first oil inlet and a second oil inlet.

[0016] In one or more embodiments of this application, the upper mold anti-fall structure further includes a measuring ruler, which includes a ruler base and a ruler body. The ruler body is slidably disposed on the ruler base, the ruler base is fixedly installed on the fixed mold base, and one end of the ruler body is fixedly connected to the movable mold base.

[0017] In one or more embodiments of this application, the fixed mold base has a plurality of guide posts on the side opposite to the main cylinder body, and the guide posts pass through the movable mold base.

[0018] In one or more embodiments of this application, the fixed mold base has a plurality of rings at one end near the oil tank, and one side of the rings is fixedly connected to the fixed mold base.

[0019] In this embodiment, the upper mold anti-fall structure is mounted on the frame. The upper mold anti-fall structure includes an oil tank, a fixed mold base, a movable mold base, a lifting drive device, and an anti-fall structure. The fixed mold base is fixedly connected to the frame, and the movable mold base is jacked up and down on the fixed mold base. The fixed mold base is located between the oil tank and the movable mold base. The lifting drive device includes a main cylinder assembly and two rapid cylinder assemblies. The main cylinder assembly includes a main cylinder body, a first piston, and a first valve stem. Each rapid cylinder assembly includes a second cylinder body, a second piston, and a second valve stem. Both the main cylinder body and the second cylinder body are fixed to the fixed mold base. The first piston... The first piston is slidably disposed within the first cylinder and separated into a first upper chamber and a first lower chamber. The second piston is slidably disposed within the second cylinder and separated into a second upper chamber and a second lower chamber. The two ends of the first valve stem are respectively connected to the movable mold base and the first piston, and the two ends of the second valve stem are respectively connected to the movable mold base and the second piston. The anti-fall structure includes a first oil pipe and a normally closed solenoid valve. The two ends of the first oil pipe are respectively connected to the oil chamber and the first lower chamber. The normally closed solenoid valve normally closes the connection between the first oil pipe and the oil tank, allowing oil to flow into the first lower chamber and provide support force to the first piston, thus achieving the advantage of being able to lock at any height and being safer. Attached Figure Description

[0020] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 The diagram illustrates the structure of a conventional stamping die.

[0022] Figure 2 The figure shows a schematic diagram of an upper mold anti-fall structure according to this application;

[0023] Figure 3 The figure shows a schematic diagram of the upper mold anti-fall structure of this application at a certain angle;

[0024] Figure 4 The diagram shows Figure 3 A sectional view at point AA;

[0025] Figure 5 The diagram shows Figure 3 A sectional view at BB;

[0026] Figure 6 The diagram illustrates the structure of the allocation block;

[0027] Figure 7 The figure shows a schematic diagram of the upper mold anti-fall structure of this application from another angle. Detailed Implementation

[0028] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0029] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0030] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0032] Schematic illustration of upper mold fall protection structure, for reference. Figures 2 to 7 According to a preferred embodiment of the present invention, an upper mold anti-fall structure is provided on a frame and includes an oil tank 10, a fixed mold base 20, a movable mold base 30, a lifting drive device 40, and an anti-fall structure 50.

[0033] Specifically, the fixed mold base 20 is fixedly connected to the frame, and the fixed connection method includes, but is not limited to, bolt connection.

[0034] Additionally, refer to Figures 2 to 4The movable mold base 30 is flexibly mounted on the fixed mold base 20, and the fixed mold base 20 is located between the oil tank 10 and the movable mold base 30 in the height direction. Specifically, to achieve the flexural mounting of the movable mold base 30 on the fixed mold base 20, the lifting drive device 40 includes a main cylinder assembly 401 and two rapid cylinder assemblies 402. The main cylinder assembly 401 includes a main cylinder body 4011, a first piston 4012, and a first valve stem 4013. Each rapid cylinder assembly 402 includes a second cylinder body 4021, a second piston 4022, and a second valve stem 4023. The main cylinder body 4011 and the second cylinder body 4021 are both fixedly mounted on the fixed mold base 20. The main cylinder body 4011 has a first oil chamber. The second cylinder 4021 has a second oil chamber. The first piston 4012 is slidably disposed in the first oil chamber and divides the first oil chamber into a first upper chamber 40111 and a first lower chamber 40112. The second piston 4022 is slidably disposed in the second oil chamber and divides the second oil chamber into a second upper chamber 40211 and a second lower chamber 40212. The two ends of the first valve stem 4013 are respectively connected to the movable mold base 30 and the first piston 4012. The two ends of the second valve stem 4023 are respectively connected to the movable mold base 30 and the second piston 4022.

[0035] It should be noted that when the movable mold base 30 moves downward, by injecting oil into the second upper cavity 40211, the two second pistons 4022 move downward synchronously a predetermined distance, and the movable mold base 30 moves downward a predetermined distance via the second valve stem 4023. Since the movable mold base 30 is fixedly connected to the first valve stem 4013, the first valve stem 4013 moves downward synchronously a predetermined distance. Conversely, when it is necessary to move the movable mold base 30 upward, by injecting oil into the second lower cavity 40212, the two second pistons 4022 move upward synchronously a predetermined distance, and the movable mold base 30 moves upward a predetermined distance. Similarly, the first valve stem 4013 moves upward a predetermined distance. It should be noted that the technology for synchronizing the two rapid hydraulic cylinder assemblies 402 is mature and widely used in the market. Here, we will not elaborate on how to make the two second pistons 4022 move synchronously. The means include, but are not limited to, the dual hydraulic cylinder synchronous control device disclosed in patent document (CN210623286U) or the synchronous force dual hydraulic cylinder system disclosed in patent document (CN200978844Y).

[0036] Additionally, it should be noted that during the operation of the rapid hydraulic cylinder assembly 402, the oil tank 10 is connected to the first oil chamber of the main cylinder body 4011; when the first valve stem 4013 moves upward and drives the first piston 4012 to move upward, the oil in the first upper chamber 40111 is pushed and flows into the oil tank 10; conversely, when the first valve stem 4013 moves downward and drives the first piston 4012 to move downward, the oil in the oil tank 10 surges into the first upper chamber 40111.

[0037] It should also be noted that during the upward movement of the second valve stem 4023, the oil in the second lower chamber 40212 itself has back pressure and provides a supporting force to the second piston 4022, preventing the movable mold base 30 from moving downward; however, if the rapid cylinder assembly 402 malfunctions or explodes, the movable mold base 30 will automatically fall under the action of gravity, posing a safety hazard.

[0038] Therefore, in this application, as Figure 5 As shown, the fall protection structure 50 includes a first oil pipe 501 and a normally closed solenoid valve 502. The two ends of the first oil pipe 501 are respectively connected to the oil chamber and the first lower chamber 40112. The normally closed solenoid valve 502 normally closes the connection between the first oil pipe 501 and the oil tank 10.

[0039] It should be noted that the first oil pipe 501 and the first lower chamber 40112 are normally filled with oil. When the rapid cylinder assembly 402 is activated, the normally closed solenoid valve 502 is energized. At this time, the first lower chamber 40112 is connected to the oil tank 10. During the up-and-down movement of the rapid cylinder assembly 402, the oil flows in the first lower chamber 40112 and the oil tank 10. It should be emphasized that when the movable mold base 30 moves upward to any position, if it is necessary to keep the movable mold base 30 at this height, that is, to de-energize the rapid hydraulic cylinder assembly 402, it should be noted that at this time, the normally closed solenoid valve 502 is also de-energized. It can be understood that the entire machine of the upper mold anti-fall structure is de-energized. Then, the first lower chamber 40112 and the oil tank 10 are isolated. The oil in the first lower chamber 40112 will provide a supporting force to the first piston 4012. Since the oil has very low compressibility, the first valve stem 4013 is difficult to move downward. Since the first valve stem 4013 is fixedly connected to the movable mold base 30, the risk of the movable mold base 30 falling freely in the event of the second cylinder 4021 bursting is avoided. Compared with the prior art, which can only be fixed by mechanical pin when the movable mold base 30 moves to the highest point, this application has the advantage of being able to lock at any height and is safer.

[0040] Furthermore, to achieve communication or isolation between the oil tank 10 and the first upper cavity 40111, such as... Figure 5 As shown, the oil tank 10 is located at the top of the main cylinder 4011 and is fixedly connected to the main cylinder 4011. The upper mold anti-fall structure also includes a flushing valve 503. When the flushing valve 503 is opened or closed, the oil tank 10 is connected to or disconnected from the first upper cavity 40111.

[0041] It should be noted that when the rapid hydraulic cylinder assembly 402 is energized, the flushing valve 503 is also energized, connecting the oil tank 10 to the first upper chamber 40111. It should also be pointed out that although the oil tank 10 is connected to the first upper chamber 40111 at this time, the oil flowing from the oil tank 10 into the first upper chamber 40111 does not have significant downward pressure. In addition, by directly placing the oil tank 10 above the main cylinder body 4011, pipelines are saved.

[0042] Furthermore, when a larger pressure needs to be applied to the movable mold base 30, such as when stamping a workpiece, etc. Figure 5 As shown, the main cylinder 4011 also has a pressurization channel 40113, one end of which is connected to the first upper cavity 40111, and the other end of which is connected to an external oil circuit.

[0043] It should be noted that when stamping the workpiece, oil is injected into the pressurization channel 40113 and a pressure is applied to the first piston 4012, thereby driving the first valve stem 4013 and the movable die base 30 to stamp the workpiece.

[0044] Furthermore, in this application, to achieve the injection of oil into the second upper cavity 40211 and the second lower cavity 40212, such as... Figure 2 and Figure 6As shown, the rapid hydraulic cylinder assembly 402 further includes two second oil pipes 4024, two third oil pipes 4025, and a distribution block 4026. The distribution block 4026 has a first oil passage 40261 and a second oil passage 40262. One end of each of the two second oil pipes 4024 is connected to both ends of the first oil passage 40261, and the other end of each second oil pipe 4024 is connected to the second upper cavity 40211 on the corresponding rapid hydraulic cylinder assembly 402. One end of each of the two third oil pipes 4025 is connected to both ends of the second oil passage 40262, and the other end of each third oil pipe 4025 is connected to the second lower cavity 40212 on the corresponding rapid hydraulic cylinder assembly 402. The first oil passage 40261 and the second oil passage 40262 are respectively connected to a first oil inlet 40263 and a second oil inlet 40264, and the first oil inlet 40263 and the second oil inlet 40264 are respectively connected to an external oil circuit.

[0045] It should be noted that when the external oil passage injects oil into the first oil inlet 40263, the oil flows into the two second upper chambers 40211 through the first oil passage 40261 along the two second oil pipes 4024 respectively; conversely, when the external oil passage injects oil into the second oil inlet 40264, the oil flows into the two second lower chambers 40212 through the second oil passage 40262 along the two third oil pipes 4025 respectively.

[0046] Furthermore, to facilitate operators in determining the height position of the movable mold base 30, such as... Figure 7 As shown, the upper mold anti-fall structure also includes a measuring ruler 70, which includes a ruler base and a ruler body. The ruler body is slidably disposed on the ruler base, and the ruler base is fixedly installed on the fixed mold base 20. One end of the ruler body is fixedly connected to the movable mold base 30, and the fixed connection method includes, but is not limited to, welding.

[0047] Furthermore, to reduce the positional offset of the movable mold base 30 during vertical movement, such as... Figure 7 As shown, the fixed mold base 20 has a plurality of guide posts 201 on the side opposite to the main cylinder body 4011, and the guide posts 201 pass through the movable mold base 30.

[0048] Furthermore, the fixed mold base 20 is provided with a plurality of rings 202 at one end near the oil tank 10. One side of the rings 202 is fixedly connected to the fixed mold base 20. The fixed connection method includes, but is not limited to, welding. During installation, the installer can hoist the fixed mold base 20 through the rings.

[0049] In summary, the upper mold anti-fall structure based on the embodiments of this application is explained, which provides advantages such as being able to lock at any height and being safer.

[0050] It is worth mentioning that, in this embodiment, the upper mold anti-fall structure is simple in structure, does not involve complex manufacturing processes or expensive materials, and is highly economical. At the same time, for manufacturers, the upper mold anti-fall structure provided in this application is easy to produce and inexpensive, which is more conducive to controlling production costs and further facilitates product promotion and use.

[0051] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. An upper die anti-falling structure arranged on a frame, characterized in that: The upper mold anti-fall structure includes One fuel tank; and A fixed mold base, the fixed mold base being fixedly connected to the frame; and A movable mold base, which is elliptically mounted on a fixed mold base, wherein the fixed mold base is located between the oil tank and the movable mold base in the height direction; and A lifting drive device includes a main cylinder assembly and two rapid cylinder assemblies. The main cylinder assembly includes a main cylinder body, a first piston, and a first valve stem. Each rapid cylinder assembly includes a second cylinder body, a second piston, and a second valve stem. The main cylinder body and the second cylinder body are fixedly mounted on a fixed mold base. The main cylinder body has a first oil chamber, and the second cylinder body has a second oil chamber. The first piston is slidably disposed within the first oil chamber, dividing the first oil chamber into a first upper chamber and a first lower chamber. The second piston is slidably disposed within the second oil chamber, dividing the second oil chamber into a second upper chamber and a second lower chamber. The two ends of the first valve stem are respectively connected to the movable mold base and the first piston, and the two ends of the second valve stem are respectively connected to the movable mold base and the second piston. A fall protection structure includes a first oil pipe and a normally closed solenoid valve. The two ends of the first oil pipe are respectively connected to the oil chamber and the first lower chamber. The normally closed solenoid valve normally closes the connection between the first oil pipe and the oil tank.

2. The upper mold anti-fall structure according to claim 1, characterized in that: The oil tank is located at the top of the main cylinder and is fixedly connected to the main cylinder. The upper mold anti-fall structure also includes a flushing valve. When the flushing valve is opened or closed, the oil tank is connected to or disconnected from the first upper cavity.

3. The upper mold anti-fall structure according to claim 2, characterized in that: The main cylinder also has a pressurization channel, which is connected to the first upper cavity.

4. The upper mold anti-fall structure according to claim 3, characterized in that: The rapid hydraulic cylinder assembly further includes two second oil pipes, two third oil pipes, and a distribution block. The distribution block has a first oil passage and a second oil passage. One end of each of the two second oil pipes is connected to both ends of the first oil passage, and the other end of each second oil pipe is connected to the second upper cavity on the corresponding rapid hydraulic cylinder assembly. One end of each of the two third oil pipes is connected to both ends of the second oil passage, and the other end of each third oil pipe is connected to the second lower cavity on the corresponding rapid hydraulic cylinder assembly. The first oil passage and the second oil passage are respectively connected to a first oil inlet and a second oil inlet.

5. The upper mold anti-fall structure according to claim 4, characterized in that: The upper mold anti-fall structure also includes a measuring ruler, which includes a ruler base and a ruler body. The ruler body is slidably disposed on the ruler base, the ruler base is fixedly installed on the fixed mold base, and one end of the ruler body is fixedly connected to the movable mold base.

6. The upper mold anti-fall structure according to claim 5, characterized in that: The fixed mold base has multiple guide pillars on the side opposite to the main cylinder body, and the guide pillars pass through the movable mold base.

7. The upper mold anti-fall structure according to claim 6, characterized in that: The fixed mold base has several rings at one end near the oil tank, and one side of each ring is fixedly connected to the fixed mold base.

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