Accurate positioning of a secondary forming die

Abstract

This utility model relates to the field of molding die technology and discloses a precision positioning secondary molding die, including a base. A first positioning mechanism is provided on the top of the base, and a second positioning mechanism is provided on the rear side of the base. Limiting posts are fixedly connected to the left and right sides of the top of the base. A lower die is inserted into the top of the base, and connecting blocks are fixedly connected to the left and right sides of the lower die. Pins are inserted into the connecting blocks. In use, when the rectangular steel plate after punching needs to be further processed for secondary molding through the first positioning mechanism, the first hydraulic cylinder drives the moving table and the upper die to move down precisely. The limiting sleeve slides along the limiting post and cooperates with the limiting shaft to limit the connection between the moving table and the upper die, ensuring that the alignment error between the upper die and the lower die is minimal. The second hydraulic cylinder pushes the limiting plate to contact the workpiece on the top of the lower die, limiting the displacement of the workpiece from the front and back direction. The cooperation of the pins and the fixed shaft securely installs the lower die on the base.

Description

Technical Field

[0001] This utility model relates to the field of molding die technology, specifically a precision positioning secondary molding die. Background Technology

[0002] In the field of molding die technology, secondary molding processes are often used to further shape workpieces that have undergone preliminary processing, such as punching and cutting, to meet the needs of complex structural designs. However, existing secondary molding dies often face the problem of insufficient positioning accuracy in practical applications, specifically manifested as follows: During the mold closing process, if the guide mechanism is not designed properly, horizontal or vertical offset may occur, resulting in deviations in the forming dimensions of the workpiece. This is especially true for workpieces with high precision requirements, such as rectangular steel plates, where even small alignment errors can lead to an increase in the scrap rate. During secondary molding, the workpiece is prone to slight displacement due to equipment vibration or airflow interference. Existing molds mostly rely on a single mechanical limiting structure, which makes it difficult to stably constrain the workpiece from multiple directions, resulting in the molded workpiece not conforming to the design dimensions. Furthermore, the upper and lower molds are either integrated or have a complex fixed structure, making it cumbersome to change between upper and lower molds of different specifications, which affects production efficiency. At the same time, the impact force during mold closing lacks an effective buffering mechanism, which can easily lead to wear of mold components and shorten their service life. Therefore, it is necessary to design a precise positioning secondary forming mold to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a precise positioning secondary forming mold to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a precision positioning secondary forming mold, including a base, a first positioning mechanism provided on the top of the base, a second positioning mechanism provided on the rear side of the base, limit posts fixedly connected to the left and right sides of the top of the base, a lower mold inserted into the top of the base, connecting blocks fixedly connected to the left and right sides of the lower mold, pins inserted into the connecting blocks, and a fixed shaft threadedly connected to the pins. The first positioning mechanism includes a support platform, which is fixedly connected to the top of the base. A first hydraulic cylinder is fixedly connected to the top of the support platform, and a movable platform is fixedly connected to the bottom of the first hydraulic cylinder. An upper mold is slidably connected to the bottom periphery of the movable platform. A limit shaft is threadedly connected inside the upper mold. Limit sleeves are fixedly connected to the left and right sides of the bottom of the movable platform. A telescopic rod is fixedly connected inside the limit sleeve. A connecting plate is fixedly connected to the bottom of the telescopic rod. The connecting plate is disposed on the top of the limit post. A spring is sleeved around the telescopic rod. A second hydraulic cylinder is fixedly connected to the middle of the front side of the support platform. A limit plate is fixedly connected to the rear side of the second hydraulic cylinder. The limit plate is disposed on the top of the lower mold.

[0005] Preferably, the bottom of the pin is inserted into the interior of the base, the fixed shaft passes through the interior of the base and the lower mold, the upper mold is slidably connected to the top of the lower mold, and a guide rod is fixedly connected to the top of the moving platform. The guide rod is slidably connected to the interior of the support platform, so as to ensure the balance and stability of the moving platform through the guide rod.

[0006] Preferably, the limiting sleeve is slidably connected to the periphery of the limiting post, the bottom of the connecting plate is in contact with the top of the limiting post, the bottom of the limiting plate is in contact with the top of the lower mold, and the limiting shaft passes through the inside of the moving table, so as to ensure the stability of the upper mold through the limiting shaft.

[0007] Preferably, the top of the spring is fixedly connected to the top of the limiting sleeve, and the bottom of the spring is fixedly connected to the top of the connecting plate, which facilitates buffering when the upper and lower molds are closed.

[0008] Preferably, there are two sets of the second hydraulic cylinder and the limiting plate, which are symmetrically distributed on the front and rear sides of the support platform. The inner sides of the two sets of limiting plates are respectively provided with rubber pads, which facilitates the centering and positioning of workpieces of different sizes.

[0009] Preferably, the second positioning mechanism includes a fixed platform, which is fixedly connected to the rear side of the base. A vacuum pump is fixedly connected to the top of the fixed platform, and a first hose is fixedly connected to the left side of the vacuum pump. A pressure gauge is fixedly connected to the periphery of the first hose. A connector is threadedly connected to the front end of the first hose, and a second hose is rotatably connected inside the connector. The second hose is fixedly connected to the inside of the lower mold. A push plate is fixedly connected to the top of the front end of the second hose, and the push plate is slidably connected to the inside of the lower mold. A third hydraulic cylinder is fixedly connected to the bottom of the push plate.

[0010] Preferably, the push plate has an adsorption hole at the top, which is circular, and the third hydraulic cylinder is fixedly connected to the bottom of the lower mold, so as to further fix and position the bottom of the workpiece through the adsorption hole.

[0011] Compared with the prior art, this utility model provides a precise positioning secondary forming mold, which has the following beneficial effects: This precision-positioning secondary forming mold, through its first positioning mechanism, allows for precise downward movement of the moving platform and upper mold when a punched rectangular steel plate requires further secondary forming. A first hydraulic cylinder drives the moving platform and upper mold downwards, while a limiting sleeve slides along the limiting post, working in conjunction with the limiting shaft to limit the connection between the moving platform and the upper mold, ensuring minimal alignment error between the upper and lower molds. A second hydraulic cylinder pushes the limiting plate to contact the workpiece at the top of the lower mold, restricting workpiece displacement from the front-to-back direction. The engagement of the pin and the fixed shaft securely mounts the lower mold on the base, preventing wobbling during forming and facilitating mold replacement. The limiting sleeve slides around the limiting post, and combined with the buffering effect of the telescopic rod and spring, ensures the guiding of the upper mold's vertical movement and alleviates the impact force during mold closing, extending the service life of all mold components.

[0012] This precision-positioning secondary forming mold, through its second positioning mechanism, integrates a vacuum pump, hose, pressure gauge, and push plate suction hole when a rectangular steel plate after punching needs further secondary forming and the workpiece is at the top of the lower mold. This allows for vacuum suction and fixation of the workpiece before mold closing. This function effectively eliminates minor displacements of the workpiece caused by gravity, vibration, or airflow, ensuring that it is in an absolutely precise design position before secondary forming, reducing scrap caused by inaccurate workpiece positioning. The push plate integrates suction and ejection functions. After mold opening, a third hydraulic cylinder drives the push plate to rise, achieving smooth and scratch-free ejection of the workpiece from the mold. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the left-side structure of this utility model; Figure 3 This is a schematic diagram of the top structure of the base; Figure 4 This is a schematic diagram of the first positioning mechanism. Figure 5 This is a schematic diagram of the bottom structure of the first hydraulic cylinder; Figure 6 This is a schematic diagram of the cross-sectional structure of the limiting sleeve; Figure 7 This is a schematic diagram of the second positioning mechanism.

[0014] In the diagram: 1. Base; 2. First positioning mechanism; 3. Second positioning mechanism; 4. Limiting post; 5. Lower mold; 6. Connecting block; 7. Fixed shaft; 8. Pin; 21. Supporting platform; 22. First hydraulic cylinder; 23. Guide rod; 24. Moving platform; 25. Upper mold; 26. Second hydraulic cylinder; 27. Limiting plate; 28. Limiting sleeve; 29. ​​Limiting shaft; 291. Telescopic rod; 292. Spring; 293. Connecting plate; 31. Fixed platform; 32. Vacuum pump; 33. Pressure gauge; 34. First hose; 35. Connector; 36. Second hose; 37. Push plate; 38. Third hydraulic cylinder. Detailed Implementation

[0015] 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.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] This utility model provides the following technical solution: Example 1

[0018] Please see Figure 1-7 This utility model provides a technical solution: a precision positioning secondary forming mold, including a base 1, a first positioning mechanism 2 is provided on the top of the base 1, a second positioning mechanism 3 is provided on the rear side of the base 1, limit posts 4 are fixedly connected to the left and right sides of the top of the base 1, a lower mold 5 is inserted into the top of the base 1, connecting blocks 6 are fixedly connected to the left and right sides of the lower mold 5, pins 8 are inserted into the connecting blocks 6, and a fixed shaft 7 is threadedly connected to the pins 8. The first positioning mechanism 2 includes a support platform 21, which is fixedly connected to the top of the base 1. A first hydraulic cylinder 22 is fixedly connected to the top of the support platform 21. A movable platform 24 is fixedly connected to the bottom of the first hydraulic cylinder 22. An upper mold 25 is slidably connected to the bottom periphery of the movable platform 24. A limit shaft 29 is threadedly connected inside the upper mold 25. Limit sleeves 28 are fixedly connected to the left and right sides of the bottom of the movable platform 24. A telescopic rod 291 is fixedly connected inside the limit sleeve 28. A connecting plate 293 is fixedly connected to the bottom of the telescopic rod 291. The connecting plate 293 is set on the top of the limit post 4. A spring 292 is sleeved around the telescopic rod 291. A second hydraulic cylinder 26 is fixedly connected to the middle of the front side of the support platform 21. A limit plate 27 is fixedly connected to the rear side of the second hydraulic cylinder 26. The limit plate 27 is set on the top of the lower mold 5.

[0019] The bottom of the pin 8 is inserted into the base 1, the fixed shaft 7 passes through the base 1 and the lower mold 5, the upper mold 25 is slidably connected to the top of the lower mold 5, and the top of the moving platform 24 is fixedly connected to the guide rod 23. The guide rod 23 is slidably connected to the inside of the support platform 21, so as to ensure the balance and stability of the moving platform 24 through the guide rod 23.

[0020] The limiting sleeve 28 is slidably connected to the periphery of the limiting post 4, the bottom of the connecting plate 293 is in contact with the top of the limiting post 4, the bottom of the limiting plate 27 is in contact with the top of the lower mold 5, and the limiting shaft 29 passes through the inside of the moving table 24, so as to ensure the stability of the upper mold 25 through the limiting shaft 29.

[0021] The top of the spring 292 is fixedly connected to the top of the inner limit sleeve 28, and the bottom of the spring 292 is fixedly connected to the top of the connecting plate 293, which facilitates the passage and can buffer the upper mold 25 and the lower mold 5 when they are closed.

[0022] Two sets of the second hydraulic cylinder 26 and the limiting plate 27 are provided and symmetrically distributed on the front and rear sides of the support platform 21. Rubber pads are provided on the inner side of the two sets of limiting plates 27, which facilitates the centering and positioning of workpieces of different sizes. Example 2

[0023] Please see Figure 1-7 Furthermore, based on Embodiment 1, the second positioning mechanism 3 includes a fixed platform 31, which is fixedly connected to the rear side of the base 1. A vacuum pump 32 is fixedly connected to the top of the fixed platform 31. A first hose 34 is fixedly connected to the left side of the vacuum pump 32. A pressure gauge 33 is fixedly connected to the periphery of the first hose 34. A connector 35 is threadedly connected to the front end of the first hose 34. A second hose 36 is rotatably connected inside the connector 35. The second hose 36 is fixedly connected to the inside of the lower mold 5. A push plate 37 is fixedly connected to the top of the front end of the second hose 36. The push plate 37 is slidably connected to the inside of the lower mold 5. A third hydraulic cylinder 38 is fixedly connected to the bottom of the push plate 37.

[0024] The push plate 37 has a suction hole at the top, which is circular. The third hydraulic cylinder 38 is fixedly connected to the bottom of the lower mold 5, so that the bottom of the workpiece can be fixed and positioned by the suction hole.

[0025] In actual operation, when this device is used and further secondary forming of the punched steel plate is required, firstly, select the matching lower die 5 and upper die 25, insert the lower die 5 into the top of the base 1, and insert the pin 8 into the connecting block 6 and the base 1. At the same time, thread the fixing shaft 7 into the base 1, the connecting block 6 and the lower die 5 to ensure the stability between the lower die 5 and the base 1. Simultaneously, slide the upper die 25 to the bottom periphery of the moving table 24, and fix the upper die 25 through the limiting shaft 29. After installation, the moving table 24 and the upper die 25 need to be moved under the action of the first hydraulic cylinder 22 to adjust the position of the upper die 25 to ensure that it matches the lower die 5. Then, place the first hose 34 inside the connector 35, rotate the connector 35 to connect the connector 35 and the first hose 34, and ensure the sealing between the first hose 34 and the second hose 36. The workpiece is placed on top of the lower mold 5. The third hydraulic cylinder 38 drives the push plate 37 to move, so that the top of the push plate 37 contacts the bottom of the workpiece. The second hydraulic cylinder 26 pushes the limiting plate 27 to contact the workpiece on top of the lower mold 5, restricting the workpiece displacement from the front and back direction. This allows for the initial positioning and centering of the workpiece. At this time, the vacuum pump 32, the first hose 34 and the second hose 36 can be used to evacuate the inside of the push plate 37, allowing the workpiece to be vacuum-adsorbed and fixed before mold closing. This function effectively eliminates the slight displacement of the workpiece caused by gravity, vibration or airflow, ensuring that it is in an absolutely precise design position before secondary molding, reducing scrap caused by inaccurate workpiece positioning. Once the positioning is complete, the first hydraulic cylinder 22 can drive the moving table 24 to move, and the moving table 24 can drive the guide rod 23 to slide inside the load-bearing platform 21. When the moving table 24 moves, it will drive the limiting sleeve 28 to slide along the limiting post 4. When it moves down to a certain position, the bottom of the connecting plate 293 will contact the top of the limiting post 4 and squeeze the telescopic rod 291 and the spring 292. Combined with the buffering effect of the telescopic rod 291 and the spring 292, it can not only ensure the guiding of the upper mold 25 to move up and down, but also reduce the impact force when the mold is closed and extend the service life of each component of the mold. When the upper mold 25 contacts the lower mold 5 to perform the forming workpiece, the third hydraulic cylinder 38 drives the push plate 37 to move down without affecting the forming work. After the mold is opened, the third hydraulic cylinder 38 drives the push plate 37 to rise, so as to smoothly and without scratches eject the workpiece from the mold. After the workpiece is removed, it can be further blown out by the vacuum pump 32 to blow out the impurities on the top of the push plate 37 and avoid the impurities from clogging and affecting the subsequent adsorption effect. When it is necessary to replace the upper mold 25 and the lower mold 5, the molds are the same size, only the shape of the forming position is different; In this application, all the first hydraulic cylinders 22, the second hydraulic cylinders 26, and the vacuum pump 32 need to be connected to the same PLC controller to ensure the coordinated operation of the equipment. The PLC controller is existing technology, and those skilled in the art are well aware of the operating procedures. Therefore, this application will not describe it in detail.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A precision positioning secondary forming mold, comprising a base (1), characterized in that: The base (1) is provided with a first positioning mechanism (2) at the top and a second positioning mechanism (3) at the rear side of the base (1). Limiting posts (4) are fixedly connected to the left and right sides of the top of the base (1). A lower mold (5) is inserted into the top of the base (1). Connecting blocks (6) are fixedly connected to the left and right sides of the lower mold (5). A pin (8) is inserted into the connecting block (6). A fixed shaft (7) is threaded into the pin (8). The first positioning mechanism (2) includes a support platform (21), which is fixedly connected to the top of the base (1). A first hydraulic cylinder (22) is fixedly connected to the top of the support platform (21). A moving platform (24) is fixedly connected to the bottom of the first hydraulic cylinder (22). An upper mold (25) is slidably connected to the bottom periphery of the moving platform (24). A limit shaft (29) is threadedly connected inside the upper mold (25). Limit sleeves (28) are fixedly connected to the left and right sides of the bottom of the moving platform (24). A telescopic rod (291) is fixedly connected inside the limiting sleeve (28). A connecting plate (293) is fixedly connected to the bottom of the telescopic rod (291). The connecting plate (293) is set on the top of the limiting post (4). A spring (292) is sleeved around the telescopic rod (291). A second hydraulic cylinder (26) is fixedly connected to the middle of the front side of the support platform (21). A limiting plate (27) is fixedly connected to the rear side of the second hydraulic cylinder (26). The limiting plate (27) is set on the top of the lower mold (5).

2. The precision positioning secondary forming mold according to claim 1, characterized in that: The bottom of the pin (8) is inserted into the base (1), the fixed shaft (7) passes through the base (1) and the lower mold (5), the upper mold (25) is slidably connected to the top of the lower mold (5), the top of the moving platform (24) is fixedly connected to the guide rod (23), and the guide rod (23) is slidably connected to the inside of the support platform (21).

3. The precision positioning secondary forming mold according to claim 1, characterized in that: The limiting sleeve (28) is slidably connected to the periphery of the limiting post (4), the bottom of the connecting plate (293) is in contact with the top of the limiting post (4), the bottom of the limiting plate (27) is in contact with the top of the lower mold (5), and the limiting shaft (29) passes through the inside of the moving table (24).

4. The precision positioning secondary forming mold according to claim 1, characterized in that: The top of the spring (292) is fixedly connected to the top of the limiting sleeve (28), and the bottom of the spring (292) is fixedly connected to the top of the connecting plate (293).

5. The precision positioning secondary forming mold according to claim 1, characterized in that: The second hydraulic cylinder (26) and the limiting plate (27) are provided in two sets and are symmetrically distributed on the front and rear sides of the support platform (21). The inner sides of the two sets of limiting plates (27) are respectively provided with rubber pads.

6. The precision positioning secondary forming mold according to claim 1, characterized in that: The second positioning mechanism (3) includes a fixed platform (31), which is fixedly connected to the rear side of the base (1). A vacuum pump (32) is fixedly connected to the top of the fixed platform (31). A first hose (34) is fixedly connected to the left side of the vacuum pump (32). A pressure gauge (33) is fixedly connected to the periphery of the first hose (34). A connector (35) is threadedly connected to the front end of the first hose (34). A second hose (36) is rotatably connected inside the connector (35). The second hose (36) is fixedly connected to the inside of the lower mold (5). A push plate (37) is fixedly connected to the top of the front end of the second hose (36). The push plate (37) is slidably connected to the inside of the lower mold (5). A third hydraulic cylinder (38) is fixedly connected to the bottom of the push plate (37).

7. The precision positioning secondary forming mold according to claim 6, characterized in that: The push plate (37) has an adsorption hole at the top, which is circular, and the third hydraulic cylinder (38) is fixedly connected to the bottom of the lower mold (5).

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