Valve body punch forming device

Abstract

The invention 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; the punching machine can be adopted to replace an oil press to serve as a power source, extra arrangement of a plurality of oil cylinders brought by the oil press is omitted in the pre-pressing process and the punching process, the fault rate and the purchase investment cost are reduced, and meanwhile 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 invention belongs to the technical field of valve manufacturing equipment, and in particular 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, tubes and profiles to cause them to undergo plastic deformation or separation, thereby obtaining workpieces of the desired shape and size.

[0003] In the field of valve manufacturing, hydraulic presses are generally used as the power source for hot rolling. However, due to the characteristics of hydraulic presses, the oil inlet, oil return and preheating of the oil cylinder, the hot rolling speed is slowed down, which will damage the mold and affect the service life of the mold. For the same set of molds, the service life of the upper mold and the lower mold will be different. The reason is reflected in the preheating time. For example, the preheating time of the upper mold is about 0.5s longer than that of the lower mold. In long-term use, the service life of the upper mold is significantly shortened. Therefore, the residence time of heat on the mold will have a great impact on the service life of the mold itself.

[0004] In addition to directly using a hydraulic press as a power source, existing valve forming devices also use multiple independent cylinders in 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 presses themselves, the oil 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. Summary of the invention

[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 the lower end;

[0009] A lower die assembly, comprising 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, wherein the punching mechanisms are slidably connected to the lower die movable plate;

[0010] A bottom mold fixed plate, 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 in 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.

[0013] Furthermore, 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 matching with 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 limit shafts are arranged between the bottom mold fixed plate and the lower mold movable plate.

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

[0019] Furthermore, the ejection material assembly comprises an ejection material screw which passes through the lower pad, the ejection material 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 penetrate 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 a power source. The pre-pressing and punching processes eliminate the additional setting of multiple cylinders brought by the oil press, thereby reducing the failure rate and purchase investment costs, and reducing energy consumption.

[0023] The punching machine that can be matched with the forming device can not only improve the stamping efficiency of the valve body, but also avoid the problem of shortening the service life of the mold due to long-term high temperature.

[0024] Since the punching mechanisms arranged in multiple directions can be linked, acting 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 It is a three-dimensional structural schematic diagram of an embodiment of a valve body stamping forming device of the present invention (viewing angle 1);

[0026] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of a valve body stamping forming device of the present invention (viewing angle 2);

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

[0028] Figure 4 It is a cross-sectional structural schematic diagram of an embodiment of a valve body stamping forming device of the present invention;

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

[0030] Figure 6 Schematic diagram of the exploded structure of the punching mechanism in the embodiment of the present invention (viewing angle 2);

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

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

[0033] Fig. 9 Schematic diagram of the three-dimensional structure of the lower mold movable plate according to an embodiment of the present invention;

[0034] Fig.10 It is a schematic diagram of the three-dimensional structure of a valve body blank according to an embodiment of the present invention;

[0035] Fig.11 It is a schematic diagram of the three-dimensional structure of the blank according to an embodiment of the present invention;

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

[0037] Upper mold assembly 1, valve body upper mold 10, lower mold movable plate 20, notch 200, valve body lower mold 21, punching mechanism 3, middle arm 30, forearm support 300, latch 301, curved arm 31, hinged seat 310, sliding seat 32, slide groove 320, sliding side ear 321, slider 33, jack 330, guide seat 34, guide groove 340, oil storage channel 35, punching rod 36, oil filling joint 37, side ejector seat 38, bottom mold fixed plate 4, guide limit shaft 40, ejector rod 41, ejector assembly 5, ejector glue 50, upper pad 51, lower pad 52, ejector screw 53, valve body blank 6, blank 7. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Among them, the drawings are only used for illustrative purposes, and they only show schematic diagrams rather than actual drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may 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 well-known structures and their descriptions in the drawings may be omitted, and the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like appear, the directions or positional relationships indicated are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, so the terms describing the positional relationship in the drawings are only used for illustrative purposes, and cannot be understood as limitations on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0040] like Figure 1 - Fig.11 As shown, the valve body stamping forming device of the present invention comprises an upper die assembly 1, a lower die assembly, a bottom die fixed plate 4 and a top material assembly 5;

[0041] Wherein, the lower end of the upper mold assembly 1 has a valve body upper mold 10;

[0042] Specifically, the lower mold assembly includes a lower mold movable plate 20, a valve body lower mold 21 disposed on the lower mold movable plate 20 and conforming to the valve body upper mold 10, and a plurality of punching mechanisms 3 arranged on the periphery of the valve body lower mold 21, and the punching mechanisms 3 are slidably connected to the lower mold movable plate 20;

[0043] The bottom mold fixed plate 4 is arranged below the lower mold movable 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 connecting line between 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 a 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 a power source. The pre-pressing and punching processes eliminate the additional setting of multiple cylinders brought by the oil press, thereby reducing the failure rate and purchase investment costs, and reducing energy consumption.

[0047] The punching machine that can be matched with the forming device can not only improve the stamping efficiency of the valve body, but also avoid the problem of shortening the service life of the mold due to long-term high temperature.

[0048] By using this forming device and stamping mode, the single hot rolling forming time can be shortened from the original 6S to less than 2S, greatly improving the 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 put 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 for valve body preparation, and 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 efficiency.

[0052] like Fig.11 As shown, the shape of the blank 7 before the valve body is formed, as shown in FIG. Fig.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 hold one, two or more blanks 7 for stamping and forming. 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 to provide 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 further pressed down by the punch press, and 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 will extend into the valve body lower die 21 to perform punching operations on 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 is completed in 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 can buffer the excessive stroke pressure generated in the upper part. On the other hand, the compressed ejector assembly 5 can apply reverse force to the upper parts after the punching process and move them upward, so that the punching mechanisms 3, the lower mold movable plate 20, etc. are restored to their initial positions, thereby preparing for the next batch of valve stamping processes, and the cycle is repeated.

[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 opened on the inner wall of the sliding seat 32 in the vertical direction. A sliding block 33 is provided at the connection between the middle arm 30 and the curved arm 31, and the sliding block 33 is placed in the sliding groove 320.

[0060] The other end of the curved arm 31 is connected to a hinge seat 310 arranged in the bottom mold fixed plate 4, while the other end of the middle arm 30 is arranged in pairs and is hinged to a small arm support 300 arranged 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 Fig. 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 forming device can simultaneously start punching the pre-pressed valve body blank 6 during the downward movement of the lower mold movable plate 20. The middle arm 30, the curved arm 31 and the various components used can convert the downward force of the punch press into a punching force for the valve body blank 6. There is no need to set up multiple cylinders separately to punch the valve body blank 6 as in the existing hydraulic press. While saving energy consumption, it also reduces the purchase investment cost, simplifies the structure, and enables rapid and continuous punching of the valve body forming and manufacturing, greatly improving the efficiency.

[0064] The two sides of the bottom of the sliding seat 32 are provided with sliding side ears 321 extending along the direction of the valve body lower mold 21 , 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 parts of the punching mechanism 3, oil storage channels 35 can be set at the slider 33, the sliding seat 32, the guide seat 34 and other parts. At the same time, oil filling joints 37 are also set at multiple corresponding positions to inject lubricating oil.

[0066] In addition, the punching rod 36 in the punching mechanism 3 is connected to the inner side of the sliding seat 32 in an integral manner, and can also be connected in a detachable manner. This setting can be adjusted in a targeted manner according to the number of blanks 7 placed in the valve body upper mold 10 and the valve body lower mold 21 and the number of holes to be punched at a specific position. For example, the side top seat 38 is detachably connected to the inner side of the sliding seat 32, and one or two punching rods 36 are connected to the other side of the side top seat 38. The side top seat 38 with different numbers of punching rods 36 can be replaced according to the needs. In addition, in order to increase the convenience of disassembly of the side top seat 38 and the sliding seat 32, the connection method between the two can adopt a mortise and tenon structure with a dovetail groove or the like.

[0067] A plurality of guide limit shafts 40 are arranged between the bottom mold fixed plate 4 and the lower mold movable plate 20. The guide limit shafts 40 ensure that the bottom mold fixed plate 4 and the lower mold movable plate 20 remain parallel during the process of approaching or moving away from each other, and nuts are used at the ends of the guide limit shafts 40 to limit the maximum amount of the relative distance between the two.

[0068] like Figure 1 , Figure 4 As shown, the ejector assembly 5 provides support during the stamping process. Specifically, it includes an ejector rubber 50 , and an upper pad 51 and a lower pad 52 disposed on both sides of the ejector rubber 50 .

[0069] A plurality of ejector rods 41 are connected between the upper pad 51 and the lower mold movable plate 20 , and the ejector rods 41 penetrate through the bottom mold fixed plate 4 .

[0070] During punching, the lower mold movable plate 20 pushes the upper pad 51 toward the lower pad 52 through the ejector rod 41 and presses the ejector glue 50 .

[0071] Since the ejector rubber 50 is compressible, after the ejector rubber 50 is compressed to a certain minimum point of the 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 the structural stability is also stronger.

[0073] In addition, if Figure 4 As shown, the ejector assembly 5 has an ejector screw 53 that penetrates the lower pad 52, the ejector rubber 50, the upper pad 51, and the end portion is connected to the bottom mold fixed plate 4. Both ends of the ejector screw 53 can be matched with nuts for tightening and adjustment. During the compression process of the ejector rubber 50, the upper pad 51 can slide relative to the ejector screw 53. The ejector screw 53 plays a role in assembly and tightening, and also plays a guiding role.

[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 belong to the protection scope of the present application.

[0075] The above are only embodiments of the present invention. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field are aware of all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement the scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention 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 the lower end; A lower die assembly, comprising 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, wherein the punching mechanisms are slidably connected to the lower die movable plate; A bottom mold fixed plate, 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 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 in 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 guiding 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: A plurality of oil injection joints are arranged in the punching mechanism.

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

9. The valve body stamping forming device according to claim 8, characterized in that: The ejection component is provided with an ejection screw which penetrates through the lower pad, the ejection rubber, the upper pad and the end portion 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 plate and the lower mold movable plate, and the ejector rods penetrate through the bottom mold fixed plate.

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