Valve body punch forming device

Abstract

The utility model discloses a valve body punch forming device which comprises an upper die assembly and a lower die assembly. The lower die assembly comprises a lower die moving plate, a valve body lower die and a plurality of punching mechanisms, the valve body lower die is arranged on the lower die moving plate and matched with the valve body upper die in shape, and the punching mechanisms are arranged on the periphery of the valve body lower die and are in sliding connection with the lower die moving plate; according to the utility model, the punching machine can be adopted to replace an oil press as a power source, and additional arrangement of a plurality of oil cylinders brought by the oil press is omitted in the pre-pressing and punching processes, so that the failure rate and the purchase investment cost are reduced, and the energy consumption is reduced. The stamping efficiency of the valve body can be improved, and meanwhile the problem that the service life of the die is shortened due to long staying at high temperature can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve manufacturing equipment, and particularly relates to a valve body stamping forming device. Background Art

[0002] Stamping refers to a processing method that uses a press and a die to apply external force to plates, strips, pipes and profiles to cause them to undergo plastic deformation or separation, thereby obtaining a workpiece of the desired shape and size.

[0003] In valve manufacturing, hydraulic presses are typically used as the power source for hot rolling. However, the characteristics of hydraulic presses, including oil filling, oil return, and preheating, slow hot rolling, which in turn damages the mold and reduces its service life. Within a mold set, the service life of the upper and lower molds can vary. This is due to preheating time. For example, the upper mold can take approximately 0.5 seconds longer than the lower mold. Over long-term use, this significantly shortens the service life of the upper mold. Therefore, the amount of time heat remains on the mold significantly affects its service life.

[0004] In addition to directly using a hydraulic press as a power source, existing valve forming devices also use multiple independent cylinders during the punching process to apply force to the forming mold from multiple directions around the periphery. Since an additional external force source is required, the equipment procurement cost is expensive.

[0005] Therefore, in the general process of manufacturing valve bodies with hydraulic presses, due to the characteristics of the hydraulic press itself, the cylinder drives the hot rolling, and the residence time in the mold closing process is relatively long, resulting in high mold loss, which also directly leads to slow rolling operation speed and reduced manufacturing efficiency. Utility Model Content

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The valve body stamping forming device comprises:

[0008] An upper die assembly having a valve body upper die at its lower end;

[0009] A lower die assembly includes a lower die movable plate, a valve body lower die disposed on the lower die movable plate and conforming to the valve body upper die, and a plurality of punching mechanisms arranged on the outer periphery of the valve body lower die, wherein the punching mechanisms are slidably connected to the lower die movable plate;

[0010] A bottom mold fixed plate is arranged below the lower mold movable plate;

[0011] At least one of the upper mold assembly and the lower mold assembly moves along the direction of the line connecting the two. After the valve body upper mold and the valve body lower mold approach each other and combine, the upper mold assembly continues to push the lower mold movable plate to move, forcing multiple punching mechanisms to slide simultaneously along a preset direction close to one side of the valve body lower mold. The punching mechanism head is provided with at least one punching rod, and the punching rod extends into the valve body upper mold and the valve body lower mold.

[0012] Furthermore, the punching mechanism includes a middle arm and a curved arm hinged to each other, a sliding seat, and a guide seat connected to the top surface of the lower mold movable plate. The inner wall of the sliding seat is provided with a sliding groove along the vertical direction. A slider is provided at the connection between the middle arm and the curved arm, and the slider is placed in the sliding groove.

[0013] Furthermore, sliding side ears extending along the direction of the lower mold of the valve body are provided on both sides of the bottom of the sliding seat, and the guide seat has a guide groove matching the sliding side ears.

[0014] Furthermore, at least one of the sliding block, the sliding seat and the guide seat is provided with an oil storage channel.

[0015] Furthermore, the punching rod is detachably connected to the inner side of the sliding seat.

[0016] Furthermore, a plurality of oil injection joints are provided in the punching mechanism.

[0017] Furthermore, a plurality of guide limiting shafts are provided between the bottom mold fixed plate and the lower mold movable plate.

[0018] Furthermore, it also includes a lifting material component, which is arranged below the bottom mold fixed plate. The lifting material component includes a lifting material rubber, and an upper pad and a lower pad arranged on both sides of the lifting material rubber.

[0019] Furthermore, the ejection assembly comprises an ejection screw which passes through the lower pad, the ejection rubber, the upper pad and the end of which is connected to the bottom mold fixed plate.

[0020] Furthermore, a plurality of ejector rods are connected between the upper pad and the lower mold movable plate, and the ejector rods pass through the bottom mold fixed plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] When using this forming device, a punch press can be used instead of an oil press as the power source. The pre-pressing and punching processes eliminate the additional setting of multiple cylinders brought by the oil press, reducing the failure rate and procurement investment costs, while reducing energy consumption.

[0023] The punching machine that can be used in conjunction with this forming device can not only improve the stamping efficiency of the valve body, but also prevent the mold from being shortened due to prolonged high temperature.

[0024] Since the punching mechanisms arranged in multiple directions can be linked, the action on the valve body blank can not only ensure the synchronization of processing, but also make the valve body blank more evenly stressed during the stamping process, and the quality of the punched holes and the entire valve body blank can also be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the valve body stamping and forming device of the present invention (viewing angle 1);

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of an embodiment of the valve body stamping and forming device of the present utility model (viewing angle 2);

[0027] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic cross-sectional view of an embodiment of a valve body stamping and forming device of the present utility model;

[0029] Figure 5 Schematic diagram of the exploded structure of the punching mechanism in the embodiment of the present utility model (viewing angle 1);

[0030] Figure 6 Schematic diagram of the exploded structure of the punching mechanism in the embodiment of the present utility model (viewpoint 2);

[0031] Figure 7 Schematic diagram of the exploded structure of the punching mechanism in the embodiment of the present utility model (viewing angle 3);

[0032] Figure 8 This is a schematic diagram of the three-dimensional structure of the upper mold assembly according to an embodiment of the present utility model;

[0033] Figure 9 This is a schematic diagram of the three-dimensional structure of the lower mold plate of an embodiment of the present utility model;

[0034] Figure 10 This is a schematic diagram of the three-dimensional structure of the valve body blank of an embodiment of the present utility model;

[0035] Figure 11 This is a schematic diagram of the three-dimensional structure of the blank of the embodiment of the utility model;

[0036] The reference numerals in the drawings of the specification include:

[0037] Upper die assembly 1, valve body upper die 10, lower die moving plate 20, notch 200, valve body lower die 21, punching mechanism 3, middle arm 30, small arm support 300, bolt 301, curved arm 31, hinge seat 310, sliding seat 32, sliding groove 320, sliding side ear 321, sliding block 33, insertion hole 330, guide seat 34, guide groove 340, oil storage channel 35, punching rod 36, oil injection connector 37, side top seat 38, bottom die fixed plate 4, guide limiting shaft 40, ejector pin 41, ejection assembly 5, ejection rubber 50, upper pad plate 51, lower pad plate 52, ejection screw 53, valve body blank 6, blank 7. DETAILED DESCRIPTION

[0038] In order for those skilled in the art to better understand the present application, the technical scheme of the present application will be further described below in conjunction with the drawings and examples.

[0039] Among them, the drawings are only used for example, the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the patent; in order to better illustrate the embodiments of the present application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted; the same or similar components in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, structure and operation, therefore the positional relationship described in the drawings is only used for example, and cannot be understood as a limitation on the patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0040] As shown in the drawings, Figure 1 - Figure 11 The valve body stamping forming device of the present application comprises an upper die assembly 1, a lower die assembly, a bottom die fixed plate 4 and an ejection assembly 5;

[0041] Among them, the lower end of the upper die assembly 1 has a valve body upper die 10;

[0042] Specifically, the lower die assembly comprises a lower die moving plate 20, a valve body lower die 21 arranged on the lower die moving plate 20 and conforming to the valve body upper die 10, and a plurality of punching mechanisms 3 arranged on the outer periphery of the valve body lower die 21, the punching mechanisms 3 being slidingly connected with the lower die moving plate 20;

[0043] The bottom die fixed plate 4 is arranged below the lower die moving plate 20;

[0044] The ejector assembly 5 is arranged below the bottom mold fixed plate 4;

[0045] At least one of the upper mold assembly 1 and the lower mold assembly moves along the direction of the line connecting the two. After the valve body upper mold 10 and the valve body lower mold 21 approach each other and combine, the upper mold assembly 1 continues to push the lower mold movable plate 20 to move, forcing multiple punching mechanisms 3 to slide simultaneously along the preset direction close to one side of the valve body lower mold 21. The head of the punching mechanism 3 is provided with at least one punching rod 36, and the punching rod 36 extends into the valve body upper mold 10 and the valve body lower mold 21.

[0046] When using this forming device, a punch press can be used instead of an oil press as the power source. The pre-pressing and punching processes eliminate the additional setting of multiple cylinders brought by the oil press, reducing the failure rate and procurement investment costs, while reducing energy consumption.

[0047] The punching machine that can be used in conjunction with this forming device can not only improve the stamping efficiency of the valve body, but also prevent the mold from being shortened due to prolonged high temperature.

[0048] Using this forming device and stamping mode, the single hot rolling forming time can be shortened from the original 6 seconds to less than 2 seconds, greatly improving valve manufacturing efficiency.

[0049] Since the punching mechanisms 3 arranged in multiple directions can be linked, acting on the valve body blank 6 can not only ensure the synchronization of processing, but also make the valve body blank 6 more evenly stressed during the stamping process, and the quality of the punched holes and the entire valve body blank 6 can also be guaranteed.

[0050] During specific use, a robot can be used to take the blank 7 and place it into the lower mold 21 of the valve body.

[0051] The valve body upper mold 10 and the valve body lower mold 21 are core components of the valve body preparation. Their appearance is crucial to the valve body. The valve body upper mold 10 and the valve body lower mold 21 in this embodiment use two blanks 7 placed horizontally, which has higher processing and molding efficiency.

[0052] like Figure 11 As shown, the shape of the blank 7 before the valve body is formed, as shown in FIG. Figure 10 This is the shape of the valve body blank 6 after molding.

[0053] The mold formed by the valve body upper mold 10 and the valve body lower mold 21 can place one, two or more blanks 7, and stamp the blanks 7. The number of blanks 7 placed can be adjusted according to the size of the mold, and no specific limitation is made here.

[0054] The power output end of the punch press is connected to the top of the upper die assembly 1, providing downward pressure thereto, so that the upper die assembly 1 moves toward the lower die assembly.

[0055] A lifting assembly 5 is provided at the bottom to provide support for the upper components. The valve body upper mold 10 is combined with the valve body lower mold 21. During this process, the blank 7 placed inside is pre-pressed.

[0056] When the pre-pressure exceeds a certain value, such as 200 tons, the upper die assembly 1 is continued to be pressed down by the punch press. In the subsequent process, the valve body upper die 10 and the valve body lower die 21 will move toward the side of the bottom die fixed plate 4 together with the lower die movable plate 20. At the same time, the punching mechanisms 3 in multiple directions arranged on the lower die movable plate 20 will slide toward the side of the valve body lower die 21 at the same time, and the punching rods 36 thereof will extend into the valve body lower die 21 to perform corresponding punching operations on the one or more valve body blanks 6 formed by stamping.

[0057] The formed hole acts as the final medium passage and connection part of the valve. After the valve body blank 6 completes the stamping process, it will be transported to the subsequent finishing operation to complete the tapping, hole opening, shot blasting and other processes.

[0058] The above punching process will compress the lower ejector assembly 5. On the one hand, the ejector assembly 5 buffers the excessive stroke pressure generated on the upper part. On the other hand, the compressed ejector assembly 5 can apply reverse force to the upper parts after punching and move them upward, so that the punching mechanisms 3, the lower mold movable plate 20, etc. return to their initial positions, thereby preparing for the next batch of valve stamping processing, and the cycle repeats.

[0059] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the punching mechanism 3 includes a middle arm 30 and a curved arm 31 that are hinged to each other, a sliding seat 32, and a guide seat 34 connected to the top surface of the lower mold movable plate 20. A sliding groove 320 is provided on the inner wall of the sliding seat 32 in the vertical direction. A slider 33 is provided at the connection between the middle arm 30 and the curved arm 31, and the slider 33 is placed in the sliding groove 320.

[0060] The other end of the curved arm 31 is connected to the hinge seat 310 provided in the bottom mold fixed plate 4, while the other end of the middle arm 30 is provided in pairs and is hinged to the small arm support 300 provided in the lower mold movable plate 20.

[0061] A latch 301 is provided at the connection between the curved arm 31 and the middle arm 30 , and an end of the latch 301 is matched with a socket 330 provided in the slider 33 .

[0062] like Figure 9 As shown, a notch 200 is provided in the lower mold movable plate 20 to match the bent portion of the crank arm 31 .

[0063] The punching mechanism 3 in the present forming device can simultaneously start the punching action on the pre-pressed valve body blank 6 during the downward movement of the lower die moving plate 20. The middle arm 30, the curved arm 31 and the various components can convert the downward pressure of the punch into punching force on the valve body blank 6, without the need for additional separate oil cylinders for punching as in the existing oil press, thereby saving energy consumption, reducing procurement investment costs, simplifying the structure, and enabling rapid and continuous punching of valve body forming and manufacturing, thereby greatly improving efficiency.

[0064] The sliding seat 32 is provided with sliding side ears 321 extending in the direction of the valve lower die 21 at the bottom of both sides, and the guide seat 34 has a guide groove 340 matched with the sliding side ears 321.

[0065] In addition, in order to reduce the wear between the rotating / moving pairs of the mechanical components of the punching mechanism 3, oil storage channels 35 can be provided at the sliding block 33, the sliding seat 32, the guide seat 34, etc., and oil injection joints 37 are also provided at corresponding positions to inject lubricating oil.

[0066] In addition, the punching rod 36 in the present punching mechanism 3 is integrally connected with the inner side of the sliding seat 32, and can also be detachably connected. This setting can be adjusted according to the number of blank 7 placed in the valve upper die 10 and the valve lower die 21 and the number of punching required at a specific position. For example, the inner side of the sliding seat 32 can be detachably connected with a side top seat 38, and the other side of the side top seat 38 is connected with one or two punching rods 36. Different side top seats 38 with different numbers of punching rods 36 can be replaced according to requirements. In addition, in order to increase the convenience of disassembling the side top seat 38 and the sliding seat 32, the connection mode of the two can adopt a dovetail groove structure.

[0067] A plurality of guide limiting shafts 40 are arranged between the bottom die fixed plate 4 and the lower die moving plate 20. The guide limiting shafts 40 ensure that the bottom die fixed plate 4 and the lower die moving plate 20 remain parallel during the approach or away process, and the end of the guide limiting shaft 40 is limited by a nut to limit the maximum relative away stroke of the two.

[0068] As shown in Figure 1 , Figure 4 The above-mentioned material pushing assembly 5 provides support force during the punching process. Specifically, it includes a material pushing rubber 50, and an upper pad plate 51 and a lower pad plate 52 arranged on both sides of the material pushing rubber 50.

[0069] A plurality of top rods 41 are connected between the upper pad plate 51 and the lower die moving plate 20, and the top rods 41 penetrate the bottom die fixed plate 4.

[0070] During punching, the lower die moving plate 20 pushes the upper pad plate 51 to move towards the side of the lower pad plate 52 through the top rods 41, and presses the material pushing rubber 50.

[0071] Since the ejector rubber 50 is compressible, after the ejector rubber 50 is compressed to the lowest point of its stroke, the external punching machine removes the external force, and then the ejector rubber 50 can provide a restoring force to return to its original state.

[0072] The top material rubber 50 has a cylindrical or disc-shaped structure. Of course, it can also be replaced by other elastic structures such as springs. The top material rubber 50 used in this embodiment is made of rubber, mainly for cost considerations. Of course, using this method, there is no need to add additional structures for coordination, and its structural stability is also stronger.

[0073] In addition, if Figure 4 As shown, the ejector assembly 5 includes an ejector screw 53 that extends through a lower plate 52, ejector rubber 50, and an upper plate 51, with its end connected to the bottom mold fixed plate 4. Nuts fit at both ends of the ejector screw 53 for tightening and adjustment. During the compression of the ejector rubber 50, the upper plate 51 and the ejector screw 53 can slide relative to each other. The ejector screw 53 not only provides assembly and tightening, but also serves as a guide.

[0074] In addition, in the present application, the specific structure and connection method of the upper mold assembly 1 can use existing technology and is easy to implement, and does not fall within the scope of protection of the present application.

[0075] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme based on their own abilities under the guidance of this application. Some typical known structures or methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the utility model, they can also make several variations and improvements, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. Valve body stamping forming device, characterized in that, include: An upper die assembly having a valve body upper die at its lower end; A lower die assembly includes a lower die movable plate, a valve body lower die disposed on the lower die movable plate and conforming to the valve body upper die, and a plurality of punching mechanisms arranged on the periphery of the valve body lower die, the punching mechanisms being slidably connected to the lower die movable plate; A bottom mold fixed plate is arranged below the lower mold movable plate; At least one of the upper mold assembly and the lower mold assembly moves along the direction of the line connecting the two. After the valve body upper mold and the valve body lower mold approach each other and combine, the upper mold assembly continues to push the lower mold movable plate to move, forcing multiple punching mechanisms to slide simultaneously along a preset direction close to one side of the valve body lower mold. The punching mechanism head is provided with at least one punching rod, and the punching rod extends into the valve body upper mold and the valve body lower mold.

2. The valve body stamping forming device according to claim 1, characterized in that: The punching mechanism includes a middle arm and a curved arm that are hinged to each other, a sliding seat, and a guide seat connected to the top surface of the lower mold movable plate. The inner wall of the sliding seat is provided with a sliding groove along the vertical direction. A sliding block is provided at the connection between the middle arm and the curved arm, and the sliding block is placed in the sliding groove.

3. The valve body stamping forming device according to claim 2, characterized in that: Sliding side ears extending along the direction of the lower mold of the valve body are arranged on both sides of the bottom of the sliding seat, and the guide seat has a guide groove matched with the sliding side ears.

4. The valve body stamping forming device according to claim 2, characterized in that: At least one of the sliding block, the sliding seat and the guide seat is provided with an oil storage channel.

5. The valve body stamping forming device according to claim 2, characterized in that: The punching rod is detachably connected to the inner side of the sliding seat.

6. The valve body stamping forming device according to claim 2, 3, 4 or 5, characterized in that: The punching mechanism is provided with a plurality of oil injection joints.

7. The valve body stamping forming device according to claim 1, wherein: A plurality of guide limiting shafts are arranged between the bottom mold fixed plate and the lower mold movable plate.

8. The valve body stamping forming device according to claim 1, characterized in that: It also includes a lifting material component, which is arranged below the bottom mold fixed plate. The lifting material component includes a lifting material rubber, and an upper pad and a lower pad arranged on both sides of the lifting material rubber.

9. The valve body stamping forming device according to claim 8, characterized in that: The ejection component comprises an ejection screw which passes through the lower pad, the ejection rubber, the upper pad and the end of which is connected to the bottom mold fixed plate.

10. The valve body stamping forming device according to claim 8 or 9, characterized in that: A plurality of ejector rods are connected between the upper pad and the lower mold movable plate, and the ejector rods pass through the bottom mold fixed plate.

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