A rapid forging and trimming device for valve blanks and its trimming method

Abstract

The present invention belongs to the technical field of valve production, and particularly relates to a rapid forging and trimming device for valve blank parts, which includes an upper die assembly, a lower die assembly, and a jacking assembly. The upper die assembly is fixedly arranged at the lower end of the pressing rod of the trimming machine, and the upper die assembly includes a trimming knife that matches the shape of the valve blank part; the lower die assembly is fixedly arranged on the workbench, and a blanking hole for the valve blank part is formed on the lower die assembly; the jacking assembly is used to tilt and jack up the flash remaining on the lower die assembly after trimming towards the waste blanking side. By tilting and jacking up the flash remaining on the lower die assembly after trimming towards the waste blanking side through the jacking assembly of the present invention, the flash can naturally slide towards the waste blanking side under the action of gravity, thereby completing the blanking of the waste. Without additional operations by the operator, the blanking of non-lightweight material waste can be completed, improving production efficiency and liberating labor force.

Description

Technical Field

[0001] The present invention belongs to the technical field of valve production, and particularly relates to a rapid forging and trimming device for valve blanks and a trimming method thereof. Background Art

[0002] The valve body is a main component in a valve; there are different mechanical manufacturing methods according to pressure grades, for example: casting, forging, etc. Valve bodies with medium and low pressure specifications are usually produced by casting processes, and valve bodies with medium and high pressure specifications are produced by forging processes. After the valve body, valve core, and valve seat seal ring form a seal, they can effectively withstand the medium pressure; the material of the valve body is selected according to different process media, and different metal materials are used. Commonly used materials include: gray cast iron, ductile cast iron, carbon steel, etc. Among them, gray cast iron valves are used in various fields of industry due to their low price and wide application range. They are usually used in the case of water, steam, oil, and gas as media, and are widely used in chemical industry, printing and dyeing, oil refining, textile, and many other industrial products with little or no impact on iron pollution. Suitable for low-pressure valves with a working temperature between -15°C and 200°C and a nominal pressure P ≤ 1.6 MPa; Ductile cast iron is a type of cast iron. The change in the internal structure of this metal makes its mechanical properties better than ordinary gray cast iron, and other properties are not damaged. It is suitable for medium and low-pressure valves with a working temperature between -30°C and 350°C and a nominal pressure P ≤ 4.0 MPa. Carbon steel is suitable for media such as water, seawater, steam, air, gas, oil products, etc., and is suitable for medium and high-pressure valves with a working temperature between -29°C and 425°C. Among them, 16Mn and 30Mn are used at a temperature between -40°C and 400°C and are often used to replace ASTM A105.

[0003] Metal-based valves can be obtained by mechanical processing methods, and metal-based valve blanks are mainly obtained by casting, hot extrusion, welding, etc. After the valve blanks are cast and extruded, flash will exist at the mold joint and both ends of the valve. At present, the flash of the valve blank can be removed on a trimming die. For example, a kind of adjustable hot forging valve trimming die with the patent number CN211413310U. This way of removing flash solves the problem of trimming the valve blank, but how to remove the flash of the valve blank that is too heavy to be blown away by the air nozzle from the trimming die. Currently, it is mainly removed manually or by the way of being pushed out by a cylinder. However, the above methods all have great problems. Because the valve blank is pressed by the upper die on the lower die to cut off the flash, the flash fits closely with the lower die. It is difficult to remove the flash manually and even if it is removed, it takes a long time, resulting in low production efficiency, large manual labor, and high cost. In addition, when using the way of directly pushing out by a cylinder, because the flash is uneven, especially the edge position is relatively sharp, it will scratch the surface of the lower die when being directly pushed out on the surface of the lower die. Repeated scratching will affect the quality of the lower die and the trimming effect. Summary of the Invention

[0004] The object of the present invention is to provide a quick forging and trimming device for valve blank parts and a trimming method thereof in view of the above-mentioned existing technical problems, achieving the effect of discharging waste materials of non-lightweight materials without additional operations by the operator, improving production efficiency and liberating labor force.

[0005] In view of this, the present invention provides a quick forging and trimming device for valve blank parts, including:

[0006] An upper die assembly, which is fixedly arranged at the lower end of the pressing rod of the trimming machine. The upper die assembly includes a trimming knife that matches the shape of the valve blank part.

[0007] A lower die assembly, which is fixedly arranged on the workbench. A blanking hole for the valve blank part is opened on the lower die assembly.

[0008] A jacking assembly, which is used to tilt and jack up the flash remaining on the lower die assembly after trimming towards the waste material blanking side.

[0009] In this technical solution, the valve blank part with flash is placed at the orifice of the blanking hole of the lower die assembly, and the flash is placed on the surface of the lower die assembly. The pressing rod drives the upper die assembly to press down, so that the valve blank part is cut by the trimming knife and discharged from the blanking hole. The flash remaining on the lower die assembly after trimming is tilted and jacked up towards the waste material blanking side by the jacking assembly, so that the flash can naturally slide towards the waste material blanking side under the action of gravity, thereby completing the blanking of waste materials. The waste materials of non-lightweight materials can be discharged without additional operations by the operator, improving production efficiency and liberating labor force.

[0010] Further, the jacking assembly includes:

[0011] The first jacking pins, and two first jacking pins are provided. The two first jacking pins are slidably arranged in the lower die assembly and are respectively arranged on both sides of the blanking hole.

[0012] The second jacking pins, and two second jacking pins are provided. The two second jacking pins are slidably arranged in the lower die assembly and are respectively arranged on both sides of the blanking hole. The two first jacking pins and the two second jacking pins form the four vertices of a rectangle surrounding the outer periphery of the blanking hole. The two first jacking pins are closer to the waste material blanking side than the two second jacking pins.

[0013] A jacking power source, which is used to drive the first jacking pins and the second jacking pins to slide upwards simultaneously beyond the lower surface of the lower die assembly, and the sliding distance of the two first jacking pins is less than the sliding distance of the two second jacking pins.

[0014] Further, the jacking power source includes:

[0015] Lifting frames, two of which are provided. The two lifting frames are respectively used to drive the up-and-down sliding of the first lifting pin and the second lifting pin. The lifting frames are fixedly arranged inside the lower die assembly, and the two lifting frames are respectively located on both sides of the blanking hole and are opposite to the positions of the first lifting pin and the second lifting pin. A lifting slide rod is slidably penetrated through each lifting frame. Two fixed plates are fixedly arranged on the lifting frame. An L-shaped bent rod is rotatably arranged on each fixed plate. The bent rod includes a first rod section and a second rod section. A first long slot and a second long slot are respectively formed on the first rod section and the second rod section. The lower ends of the first lifting pin and the second lifting pin are vertically and fixedly connected with a first connecting column. Two second connecting columns are arranged at intervals on the lifting slide rod. The first connecting column is slidably arranged in the first long slot, and the second connecting column is slidably arranged in the second long slot. The distance from the rotation hinge point between the bent rod on the lifting frame controlling the first lifting pin and the fixed plate to the first lifting pin is greater than the distance from the rotation hinge point between the bent rod on the lifting frame controlling the second lifting pin and the fixed plate to the first lifting pin. The length of the first rod section of the bent rod on the lifting frame controlling the first lifting pin is longer than the length of the first rod section of the bent rod on the lifting frame controlling the second lifting pin;

[0016] A driving cylinder, which is fixedly arranged on the trimming machine and is used to drive the lateral sliding of the lifting slide rod on the lifting frame.

[0017] In this technical solution, when the driving cylinder is started and the flash is trimmed, the first lifting pin and the second lifting pin are both inside the lower die assembly and the upper ends are flush with the surface of the lower die assembly. When the flash is cut off and needs to be blanked, the system automatically starts the driving cylinder to make the lifting slide rods on the two lifting frames controlling the first lifting pin and the second lifting pin slide laterally synchronously, causing the bent rods to rotate, thereby driving the first lifting pin and the second lifting pin to slide upward. Since the distance from the rotation hinge point between the bent rod on the lifting frame controlling the first lifting pin and the fixed plate to the first lifting pin is greater than the distance from the rotation hinge point between the bent rod on the lifting frame controlling the second lifting pin and the fixed plate to the first lifting pin, and the length of the first rod section of the bent rod on the lifting frame controlling the first lifting pin is longer than the length of the first rod section of the bent rod on the lifting frame controlling the second lifting pin, when the two lifting slide rods slide laterally by the same distance, the distance that the second lifting pin rises out of the surface of the lower die assembly is much greater than that of the first lifting pin, forming a situation where the flash inclines towards the waste blanking side. If the edge of the flash is sharp and the burrs are small, it can smoothly slide down from the waste blanking side. This way of lifting the flash obliquely and sliding it down can make the flash slide down suspended, reduce the scratching of the lower die, improve the trimming accuracy and the service life of the die. And under the same power source and the same time, the distances that the first lifting pin and the second lifting pin lift upward are different, that is, the rising speeds of the two ends of the flash are different. The flash on the side corresponding to the second lifting pin rises faster, which can provide a driving force for the downward movement of the flash and promote the sliding of the flash.

[0018] Further, the jacking assembly further includes a rear jacking structure, which is used to provide an initial driving force for the flash to slide towards the waste material discharging side after the first jacking pin stops jacking up by continuously jacking up the first jacking pin.

[0019] Further, the rear jacking structure includes:

[0020] A synchronous plate, which is connected to the output end of the driving cylinder,

[0021] A first connecting block, which is fixedly arranged on the side of the synchronous plate away from the driving cylinder and is fixedly connected to the end of the jacking rod controlling the second jacking pin;

[0022] A second connecting block, which is fixedly arranged on the side of the synchronous plate away from the driving cylinder. The second connecting block includes two parts on the left and right, which are connected by a spring in the middle. The side of the second connecting block away from the synchronous plate is fixedly connected to the end of the jacking rod controlling the first jacking pin. A limiting ring is arranged on the jacking rod controlling the first jacking pin to limit the lateral sliding of the jacking rod.

[0023] In this technical solution, when the piston rod of the driving cylinder extends to drive the two jacking rods to move and the first jacking pin and the second jacking pin jack up a certain distance, the limiting ring of the jacking rod controlling the first jacking pin slides to the end of the jacking frame, so that the jacking rod stops moving laterally, and then the first jacking pin stops jacking up. However, at this time, the piston rod of the driving cylinder still continues to extend, so the driving cylinder will make the synchronous plate continue to move laterally. Then, the part of the second connecting block close to the synchronous plate will still continue to move horizontally, but the right part of the second connecting block does not move. The displacement of the left part of the second connecting block is absorbed by the spring. At this time, the first jacking pin will not continue to jack up, while the first connecting block will continue to move to make the second jacking pin continue to jack up, thereby providing an initial driving force for the flash to slide towards the waste material discharging side, enabling the flash to slide out of the material better. The spring of the second connecting block is selected as a spring with a relatively large spring force. In the case where there is no limiting resistance of the limiting ring on the jacking rod, the second connecting block can move as a whole without compression or elongation deformation of the spring.

[0024] Further, the lower die assembly includes a first lower template and a second lower template, and the jacking assembly is arranged in the second lower template.

[0025] In this technical solution, the first lower template can be replaced according to the specific shape of the valve body, while the second lower template is universal, improving the versatility of the lower die assembly.

[0026] Further, the first jacking pin and the second jacking pin include multiple segments in the length direction, and each segment is connected by a threaded structure. The second lower template includes two detachable upper and lower parts.

[0027] In this technical solution, it is convenient for the assembly of the jacking assembly in the lower die assembly.

[0028] Further, a downward sliding inclined surface is provided on the lower die assembly near the waste material discharging side, and an anti-hanging component is also provided on the lower die assembly, and the anti-hanging component is used to prevent the flash from not sliding out of the lower die assembly.

[0029] Further, the anti-hanging component includes:

[0030] An anti-hanging strip, a first anti-hanging groove is opened on the lower die assembly near the waste material discharging side, the first anti-hanging groove extends along to the downward sliding inclined surface, the anti-hanging strip is slidably arranged in the first anti-hanging groove, the upper end part of the anti-hanging strip extends out with a widened section, the widened section is slidably arranged on the surface of the downward sliding inclined surface, anti-hanging pin shafts are arranged on both sides of the anti-hanging strip, and guiding grooves parallel to the inclined direction of the downward sliding inclined surface are opened on both side walls of the first anti-hanging groove, and the anti-hanging pin shafts are slidably arranged in the guiding grooves;

[0031] A transverse driving plate, a second anti-hanging groove is opened in the second lower template, a transverse driving plate is slidably arranged in the second anti-hanging groove, a straight groove and an inclined groove are opened on the transverse driving plate, the lower end of the above anti-hanging strip is slidably arranged in the straight groove, the angle between the inclined groove and the straight groove is 60°, an anti-hanging driving shaft is vertically arranged on the lifting slide rod of the lifting frame controlling the first lifting pin, and the anti-hanging driving shaft penetrates through the inclined groove and is slidably connected with the inclined groove.

[0032] In this technical solution, some flash has large sharp burrs and may be hung on the downward sliding inclined surface during the sliding process, which affects the trimming of the next valve blank. During trimming, the transverse driving plate of the anti-hanging component is located on the outside. When the driving cylinder drives the lifting slide rod to lift the flash, the lifting slide rod moves and drives the transverse driving plate to move inward. When the lifting slide rod slides back in the reverse direction after lifting the flash, the anti-hanging driving shaft moves horizontally with the lifting slide rod, so that the transverse driving plate moves in the second anti-hanging groove towards the waste material discharging side, and then drives the anti-hanging strip to move outward and downward along the guiding groove, that is, the widened section of the anti-hanging strip always moves along the surface of the downward sliding inclined surface, so as to smoothly slide the flash hanging on the downward sliding inclined surface through friction, and then discharge the material from the waste material discharging side. This structure can also protect the downward sliding inclined surface from being scratched by the flash with overly sharp burrs hanging on the downward sliding inclined surface.

[0033] Further, the trimming method includes:

[0034] S1: Trimming, placing the valve blank with flash at the orifice of the blanking hole of the lower die assembly, the flash is placed on the surface of the lower die assembly, the pressing rod drives the upper die assembly to press down, and the valve blank is cut by the trimming knife and discharged from the blanking hole;

[0035] S2: Inclined lifting and downward sliding, the lifting component inclines and lifts the flash remaining on the lower die assembly after trimming towards the waste material discharging side, so that the flash naturally inclines and slides towards the waste material discharging side under the action of gravity;

[0036] S3: The rear top slides downwards. After the first lifting pin stops lifting upwards, the first lifting pin continues to lift upwards to provide an initial driving force for the flash to slide towards the waste discharging side.

[0037] S4: Prevent hanging and promote sliding. The anti-hanging component helps the flash that has not slid out of the downward-sliding inclined plane to slide out of the lower die component.

[0038] The beneficial effects of the present invention are as follows:

[0039] 1. Place the valve blank with flash at the orifice of the discharging hole of the lower die component. The flash is placed on the surface of the lower die component. The pressing rod drives the upper die component to press downwards, so that after the valve blank is cut by the trimming die, it is discharged from the discharging hole. The flash remaining on the lower die component after trimming is tilted and lifted upwards towards the waste discharging side by the lifting component, enabling the flash to naturally tilt and slide towards the waste discharging side under the action of gravity, thereby completing the discharging of the waste. The waste discharging of non-lightweight materials can be completed without additional operations by the operator, improving production efficiency and liberating labor force.

[0040] 2. The method of tilting and lifting the flash to slide and discharge can make the flash slide down suspended, reducing scratching of the lower die, improving trimming accuracy and the service life of the die. And under the same power source and the same time, the lifting distances of the first lifting pin and the second lifting pin are different, that is, the rising speeds of both ends of the flash are different. The flash on the side corresponding to the second lifting pin rises faster, which can provide a driving force for the downward movement of the flash and promote the sliding of the flash.

[0041] 3. The rear top structure enables the first lifting pin to continue to lift upwards after stopping lifting, providing an initial driving force for the flash to slide towards the waste discharging side.

[0042] 4. The anti-hanging strip of the anti-hanging component can move outwards and downwards along the guiding groove, that is, the widened section of the anti-hanging strip always moves along the surface of the downward-sliding inclined plane, thereby driving the flash hanging on the downward-sliding inclined plane to slide smoothly through friction, and then discharging from the waste discharging side, avoiding affecting the trimming of the next valve blank. And this structure can also protect the downward-sliding inclined plane from being scratched by the flash with overly sharp burrs hanging on the downward-sliding inclined plane. Brief Description of the Drawings

[0043] Figure 1 is the three-dimensional view of the present invention on the trimming machine;

[0044] Figure 2 is the three-dimensional view of the valve blank with flash on the lower die component;

[0045] Figure 3 is the three-dimensional view of the flash on the lower die component;

[0046] Figure 4 is the three-dimensional view of the flash after being tilted and lifted on the lower die component;

[0047] Figure 5 It is a three-dimensional picture of the flash hanging on the downward slope;

[0048] Figure 6 It is a three-dimensional picture of the flash hanging on the downward slope;

[0049] Figure 7 It is an exploded view of the lower die assembly;

[0050] Figure 8 It is an exploded view of the second lower template and the jacking assembly;

[0051] Figure 9 It is a stereogram of the second lower template;

[0052] Figure 10 is a three-dimensional view of the jacking assembly;

[0053] Figure 11 is a cross-sectional view of the jacking assembly;

[0054] Figure 12 yes Figure 11 A partial enlarged view of the middle A;

[0055] Figure 13 It is an exploded view of the jacked-up assembly;

[0056] Figure 14 It is a cross-sectional view of the second lower template.

[0057] The symbols in the figure are:

[0058] 1. Upper die assembly; 2. Trimming machine; 3. Lower pressure rod; 4. Trimming knife; 5. Valve blank; 6. Lower die assembly; 7. Workbench; 8. Lifting assembly; 9. Waste material discharge side; 10. Discharge hole; 11. First lifting pin; 12. Second lifting pin; 13. Lifting frame; 14. Lifting slide rod; 15. Fixed plate; 16. Bending rod; 17. First rod section; 18. Second rod section; 19. First long slot; 20. Second long slot; 21. First connecting column; 22. Second connecting column; 23. Driving cylinder; 24. rear top structure; 25. flash; 26. synchronization plate; 27. first connecting block; 28. second connecting block; 29. ​​spring; 30. limiting ring; 31. first lower template; 32. second lower template; 33. downward sliding slope; 34. anti-hanging component; 35. anti-hanging strip; 36. first anti-hanging groove; 37. widening section; 38. anti-hanging pin shaft; 39. guide groove; 40. transverse driving plate; 41. second anti-hanging groove; 42. straight groove; 43. oblique groove; 44. anti-hanging driving shaft. DETAILED DESCRIPTION

[0059] The following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application fall within the scope of protection of the present application.

[0060] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0061] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0062] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0063] It should be noted that in this application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the methods and devices in the embodiments of this application are not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0064] Embodiment 1

[0065] As Figures 1-5 shown, a quick forging and trimming device for valve blanks 5 includes:

[0066] An upper die assembly 1, which is fixedly arranged at the lower end of the pressing rod 3 of the trimming machine 2. The upper die assembly 1 includes a trimming knife 4 that matches the shape of the valve blank 5.

[0067] A lower die assembly 6, which is fixedly arranged on the workbench 7. A blanking hole 10 for the valve blank 5 is formed in the lower die assembly 6.

[0068] A lifting assembly 8, which is used to tilt and lift the flash 25 remaining on the lower die assembly 6 after trimming towards the waste blanking side 9.

[0069] Place the valve blank 5 with flash 25 at the orifice of the blanking hole 10 of the lower die assembly 6, with the flash 25 resting on the surface of the lower die assembly 6. The pressing rod 3 drives the upper die assembly 1 to press down, so that the valve blank 5 is trimmed by the trimming knife 4 and then discharged through the blanking hole 10. The lifting assembly 8 tilts and lifts the flash 25 remaining on the lower die assembly 6 after trimming towards the waste blanking side 9, which can cause the flash 25 to naturally tilt and slide towards the waste blanking side 9 under the action of gravity, thereby completing the blanking of the waste. The waste blanking of non-lightweight materials can be completed without additional operations by the operator, improving production efficiency and liberating labor.

[0070] Embodiment 2

[0071] As Figures 6-11 shown, the lifting assembly 8 includes:

[0072] The first lifting pin 11, there are two first lifting pins 11 in total, and the two first lifting pins 11 are slidably arranged in the lower die assembly 6 and are respectively arranged on both sides of the blanking hole 10;

[0073] The second lifting pin 12, there are two second lifting pins 12 in total, and the two second lifting pins 12 are slidably arranged in the lower die assembly 6 and are respectively arranged on both sides of the blanking hole 10. The two first lifting pins 11 and the two second lifting pins 12 form the four vertices of a rectangle surrounding the outer periphery of the blanking hole 10, and the two first lifting pins 11 are closer to the waste blanking side 9 than the two second lifting pins 12;

[0074] The lifting power source is used to drive the first lifting pin 11 and the second lifting pin 12 to slide upward simultaneously beyond the lower surface of the lower die assembly 6, and the sliding distance of the two first lifting pins 11 is less than the sliding distance of the two second lifting pins 12.

[0075] The lifting power source includes:

[0076] The lifting frame 13, there are two of them. The two lifting frames 13 are respectively used to drive the up and down sliding of the first lifting pin 11 and the second lifting pin 12. The lifting frame 13 is fixedly arranged in the lower die assembly 6 and the two lifting frames 13 are respectively located on both sides of the blanking hole 10 opposite to the positions of the first lifting pin 11 and the second lifting pin 12. A lifting slide rod 14 is slidably penetrated through each lifting frame 13. Two fixing plates 15 are fixedly arranged on the lifting frame 13. An L-shaped bent rod 16 is rotatably arranged on each fixing plate 15. The bent rod 16 includes a first rod segment 17 and a second rod segment 18. A first long slot 19 and a second long slot 20 are respectively opened on the first rod segment 17 and the second rod segment 18. The lower ends of the first lifting pin 11 and the second lifting pin 12 are vertically and fixedly connected with a first connecting column 21. Two second connecting columns 22 are arranged at intervals on the lifting slide rod 14. The first connecting column 21 is slidably arranged in the first long slot 19, and the second connecting column 22 is slidably arranged in the second long slot 20. The distance from the rotation hinge point of the bent rod 16 on the lifting frame 13 controlling the first lifting pin 11 to the first lifting pin 11 is greater than the distance from the rotation hinge point of the bent rod 16 on the lifting frame 13 controlling the second lifting pin 12 to the first lifting pin 11. The length of the first rod segment 17 of the bent rod 16 on the lifting frame 13 controlling the first lifting pin 11 is longer than the length of the first rod segment 17 of the bent rod 16 on the lifting frame 13 controlling the second lifting pin 12;

[0077] The driving cylinder 23 is fixedly arranged on the trimming machine 2 to drive the horizontal sliding of the lifting slide rod 14 on the lifting frame 13.

[0078] When the driving cylinder 23 is activated to cut the flash 25, both the first lifting pin 11 and the second lifting pin 12 are within the lower die assembly 6 and their upper ends are flush with the surface of the lower die assembly 6. When the flash 25 is cut off and needs to be discharged, the system automatically activates the driving cylinder 23 to make the lifting slide rods 14 on the two lifting brackets 13 that control the first lifting pin 11 and the second lifting pin 12 slide horizontally synchronously, causing the bent rod 16 to rotate, thereby driving the first lifting pin 11 and the second lifting pin 12 to slide upward. Since the distance from the rotation hinge point of the bent rod 16 on the lifting bracket 13 that controls the first lifting pin 11 to the fixed plate 15 to the first lifting pin 11 is greater than the distance from the rotation hinge point of the bent rod 16 on the lifting bracket 13 that controls the second lifting pin 12 to the fixed plate 15 to the first lifting pin 11, and the length of the first rod segment 17 of the bent rod 16 on the lifting bracket 13 that controls the first lifting pin 11 is longer than the length of the first rod segment 17 of the bent rod 16 on the lifting bracket 13 that controls the second lifting pin 12. When the two lifting slide rods 14 move horizontally the same distance, the distance that the second lifting pin 12 rises above the surface of the lower die assembly 6 is much greater than that of the first lifting pin 11, thus forming a situation where the flash 25 inclines towards the waste discharging side 9. If the sharp burrs on the edge of the flash 25 are small, it can smoothly slide down from the waste discharging side 9. This way of lifting the flash 25 obliquely and sliding it down can make the flash 25 slide down suspended, reducing scratching of the lower die, improving the trimming accuracy and the service life of the die. And under the same power source and the same time, the lifting distances of the first lifting pin 11 and the second lifting pin 12 are different, that is, the rising speeds at both ends of the flash 25 are different. The flash 25 on the side corresponding to the second lifting pin 12 rises faster, which can provide a driving force for the flash 25 to move downward and promote the sliding of the flash 25.

[0079] Embodiment III

[0080] As Figures 10-12 shown, the lifting assembly 8 further includes a rear lifting structure 24, and the rear lifting structure 24 is used to make the first lifting pin 11 continue to lift after it stops lifting, providing an initial driving force for the flash 25 to slide towards the waste discharging side 9.

[0081] The rear lifting structure 24 includes:

[0082] A synchronous plate 26, which is connected to the output end of the driving cylinder 23,

[0083] A first connecting block 27, which is fixedly arranged on the side of the synchronous plate 26 away from the driving cylinder 23 and is fixedly connected to the end of the lifting slide rod 14 that controls the second lifting pin 12;

[0084] The second connecting block 28 is fixedly arranged on the side of the synchronization plate 26 away from the driving cylinder 23. The second connecting block 28 includes two parts on the left and right, which are connected by a spring 29 in the middle. The side of the second connecting block 28 away from the synchronization plate 26 is fixedly connected to the end of the lifting slide rod 14 that controls the first lifting pin 11. A limiting ring 30 is arranged on the lifting slide rod 14 that controls the first lifting pin 11, and is used to limit the lateral sliding of the lifting slide rod 14.

[0085] When the piston rod of the driving cylinder 23 extends to drive the two lifting slide rods 14 to move and the first lifting pin 11 and the second lifting pin 12 are jacked up by a certain distance, the limiting ring 30 of the lifting slide rod 14 that controls the first lifting pin 11 slides to the end of the lifting frame 13, so that the lifting slide rod 14 stops moving laterally, then the first lifting pin 11 stops jacking up. However, at this time, the piston rod of the driving cylinder 23 still continues to extend, then the driving cylinder 23 will make the synchronization plate 26 continue to move laterally. Then, the part of the second connecting block 28 close to the synchronization plate 26 will still continue to move horizontally, but the right part of the second connecting block 28 does not move. The displacement of the left part of the second connecting block 28 is absorbed by the spring 29. At this time, the first lifting pin 11 will not continue to jack up, while the first connecting block 27 will continue to move to make the second lifting pin 12 continue to jack up, thereby providing an initial driving force for the flash 25 to slide down to the waste material discharging side 9, enabling the flash 25 to slide out of the material better. The spring 29 of the second connecting block 28 is a spring 29 with a relatively large spring 29 force. In the case where there is no limiting resistance of the limiting ring 30 on the lifting slide rod 14, the second connecting block 28 can move as a whole, and the spring 29 has no compression or elongation deformation.

[0086] The lower die assembly 6 includes a first lower template 31 and a second lower template 32, and the lifting assembly 8 is arranged in the second lower template 32. The first lower template 31 can be replaced according to the specific valve body shape, while the second lower template 32 is universal, improving the universality of the lower die assembly 6.

[0087] The first lifting pin 11 and the second lifting pin 12 include multiple segments in the length direction, and each segment is connected by a threaded structure. The second lower template 32 includes two detachable upper and lower parts, which is convenient for the assembly of the lifting assembly 8 in the lower die assembly 6.

[0088] A lower inclined surface 33 is arranged on the lower die assembly 6 close to the waste material discharging side 9. An anti-hanging component 34 is also arranged on the lower die assembly 6, and the anti-hanging component 34 is used to prevent the flash 25 from not sliding out of the lower die assembly 6.

[0089] Embodiment 4

[0090] As Figures 13-14 shown,

[0091] The anti-hanging component 34 includes:

[0092] Anti-hanging strip 35, a first anti-hanging groove 36 is opened on the lower die assembly 6 near the waste material discharging side 9, the first anti-hanging groove 36 extends along the downward inclined surface 33, the anti-hanging strip 35 is slidably arranged in the first anti-hanging groove 36, the upper end of the anti-hanging strip 35 extends out with a widened section 37, the widened section 37 is slidably arranged on the surface of the downward inclined surface 33, anti-hanging pins 38 are arranged on both sides of the anti-hanging strip 35, and guide grooves 39 parallel to the inclined direction of the downward inclined surface 33 are opened on the two side walls of the first anti-hanging groove 36, and the anti-hanging pins 38 are slidably arranged in the guide grooves 39;

[0093] Transverse drive plate 40, a second anti-hanging groove 41 is opened in the second lower template 32, the transverse drive plate 40 is slidably arranged in the second anti-hanging groove 41, a straight groove 42 and an inclined groove 43 are opened on the transverse drive plate 40, the lower end of the above anti-hanging strip 35 is slidably arranged in the straight groove 42, the angle between the inclined groove 43 and the straight groove 42 is 60°, a anti-hanging drive shaft 44 is vertically arranged on the lifting slide rod 14 of the lifting frame 13 for controlling the first lifting pin 11, and the anti-hanging drive shaft 44 is arranged in the inclined groove 43 and slidably connected with the inclined groove 43.

[0094] Some flash 25 has large sharp burrs and may be hung on the downward inclined surface 33 during the sliding process, which affects the trimming of the next valve blank 5, as Figure 5 shown. During trimming, the transverse drive plate 40 of the anti-hanging assembly 34 is located on the outside. When the driving cylinder 23 drives the lifting slide rod 14 to lift the flash 25, the lifting slide rod 14 moves and drives the transverse drive plate 40 to move inward. When the lifting slide rod 14 slides back in the reverse direction after lifting the flash 25, the anti-hanging drive shaft 44 moves horizontally with the lifting slide rod 14, so that the transverse drive plate 40 moves towards the waste material discharging side 9 in the second anti-hanging groove 41, and then drives the anti-hanging strip 35 to move outward and downward along the guide groove 39, that is, the widened section 37 of the anti-hanging strip 35 always moves along the surface of the downward inclined surface 33, so as to smoothly slide the flash 25 hanging on the downward inclined surface 33 through friction, and then discharge the material from the waste material discharging side 9. This structure can also protect the downward inclined surface 33 from being scratched by the flash 25 with too sharp burrs hanging on the downward inclined surface 33.

[0095] The trimming method includes:

[0096] S1: Trimming, placing the valve blank 5 with flash 25 at the orifice of the blanking hole 10 of the lower die assembly 6, the flash 25 is placed on the surface of the lower die assembly 6, the pressing rod 3 drives the upper die assembly 1 to press down, and the valve blank 5 is trimmed by the trimming knife 4 and then discharged from the blanking hole 10;

[0097] S2: Inclined lifting and downward sliding, the lifting assembly 8 inclines and lifts the flash 25 remaining on the lower die assembly 6 after trimming towards the waste material discharging side 9, so that the flash 25 naturally inclines and slides towards the waste material discharging side 9 under the action of gravity;

[0098] S3: The rear top slides downwards. After the first lifting pin 11 stops lifting upwards, the first lifting pin 11 continues to lift upwards to provide an initial driving force for the flash 25 to slide towards the waste material discharging side 9.

[0099] S4: Prevent hanging and promote sliding. The anti-hanging component 34 helps the flash 25 that has not slid out of the downward-sliding inclined surface 33 to slide out of the lower die assembly 6.

[0100] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A quick forging and trimming device for a valve blank (5), characterized in that , including: An upper die assembly (1), the upper die assembly (1) is fixedly arranged at the lower end of the pressing rod (3) of the trimming machine (2), and the upper die assembly (1) includes a trimming knife (4) that matches the shape of the valve blank (5); A lower die assembly (6), the lower die assembly (6) is fixedly arranged on the workbench (7), and a blanking hole (10) for the valve blank (5) is provided on the lower die assembly (6); A jacking assembly (8), the jacking assembly (8) is used to jack up the flash (25) remaining on the lower die assembly (6) after trimming towards the waste blanking side (9); The jacking assembly (8) includes: A first jacking pin (11), there are two first jacking pins (11) in total, and the two first jacking pins (11) are slidably arranged in the lower die assembly (6) and are respectively arranged on both sides of the blanking hole (10); A second jacking pin (12), there are two second jacking pins (12) in total, and the two second jacking pins (12) are slidably arranged in the lower die assembly (6) and are respectively arranged on both sides of the blanking hole (10). The two first jacking pins (11) and the two second jacking pins (12) form the four vertices of a rectangle surrounding the outer periphery of the blanking hole (10), and the two first jacking pins (11) are closer to the waste blanking side (9) than the two second jacking pins (12); A jacking power source, the jacking power source is used to drive the first jacking pin (11) and the second jacking pin (12) to slide upwards simultaneously beyond the lower surface of the lower die assembly (6), and the sliding distance of the two first jacking pins (11) is less than the sliding distance of the two second jacking pins (12); The jacking power source includes: Lifting frames (13), two lifting frames (13) are respectively used to drive the up-and-down sliding of the first lifting pin (11) and the second lifting pin (12). The lifting frames (13) are fixedly arranged in the lower die assembly (6), and the two lifting frames (13) are respectively located on both sides of the blanking hole (10) and are opposite to the positions of the first lifting pin (11) and the second lifting pin (12). A lifting slide rod (14) is slidably penetrated through each lifting frame (13). Two fixing plates (15) are fixedly arranged on the lifting frame (13). An L-shaped bent rod (16) is rotatably arranged on each fixing plate (15). The bent rod (16) includes a first rod section (17) and a second rod section (18). A first long slot (19) and a second long slot (20) are respectively formed in the first rod section (17) and the second rod section (18). The lower ends of the first lifting pin (11) and the second lifting pin (12) are vertically and fixedly connected with a first connecting column (21). Two second connecting columns (22) are arranged at intervals on the lifting slide rod (14). The first connecting column (21) is slidably arranged in the first long slot (19), and the second connecting column (22) is slidably arranged in the second long slot (20). The distance from the rotation hinge point between the bent rod (16) and the fixing plate (15) on the lifting frame (13) controlling the first lifting pin (11) to the first lifting pin (11) is greater than the distance from the rotation hinge point between the bent rod (16) and the fixing plate (15) on the lifting frame (13) controlling the second lifting pin (12) to the first lifting pin (11). The length of the first rod section (17) of the bent rod (16) on the lifting frame (13) controlling the first lifting pin (11) is longer than the length of the first rod section (17) of the bent rod (16) on the lifting frame (13) controlling the second lifting pin (12). A driving cylinder (23), the driving cylinder (23) is fixedly arranged on the trimming machine (2) and is used to drive the transverse sliding of the lifting slide rod (14) on the lifting frame (13).

2. A quick forging and trimming device for a valve blank (5) according to claim 1, characterized in that, The lifting assembly (8) further includes a rear lifting structure (24), and the rear lifting structure (24) is used to provide an initial driving force for the flash (25) to slide towards the waste material blanking side (9) after the first lifting pin (11) stops lifting and then continues to lift.

3. A quick forging and trimming device for a valve blank (5) according to claim 2, characterized in that, The rear lifting structure (24) includes: A synchronous plate (26), the synchronous plate (26) is connected to the output end of the driving cylinder (23). A first connecting block (27), the first connecting block (27) is fixedly arranged on the side of the synchronous plate (26) away from the driving cylinder (23) and is fixedly connected to the end of the lifting slide rod (14) controlling the second lifting pin (12). A second connecting block (28), which is fixedly arranged on the side of the synchronous plate (26) away from the driving cylinder (23). The second connecting block (28) includes two parts on the left and right, which are connected by a spring (29) in the middle. The side of the second connecting block (28) away from the synchronous plate (26) is fixedly connected to the end of a lifting slide rod (14) that controls the first lifting pin (11). A limiting ring (30) is arranged on the lifting slide rod (14) that controls the first lifting pin (11) to limit the lateral sliding of the lifting slide rod (14).

4. A quick forging and trimming device for a valve blank (5) according to claim 3, characterized in that, The lower die assembly (6) includes a first lower template (31) and a second lower template (32), and the lifting assembly (8) is arranged in the second lower template (32).

5. A quick forging and trimming device for a valve blank (5) according to claim 4, characterized in that, The first lifting pin (11) and the second lifting pin (12) include multiple segments in the length direction, and each segment is connected by a threaded structure. The second lower template (32) includes two detachable upper and lower parts.

6. A quick forging and trimming device for a valve blank (5) according to claim 5, characterized in that, A lower inclined surface (33) is arranged on the lower die assembly (6) near the waste material discharging side (9). An anti-hanging component (34) is also arranged on the lower die assembly (6), and the anti-hanging component (34) is used to prevent the flash (25) from not sliding out of the lower die assembly (6).

7. A quick forging and trimming device for a valve blank (5) according to claim 6, characterized in that, The anti-hanging component (34) includes: An anti-hanging strip (35). A first anti-hanging groove (36) is opened on the lower die assembly (6) near the waste material discharging side (9), and the first anti-hanging groove (36) extends to the lower inclined surface (33). The anti-hanging strip (35) is slidably arranged in the first anti-hanging groove (36). The upper end of the anti-hanging strip (35) extends out with a widened section (37), and the widened section (37) is slidably arranged on the surface of the lower inclined surface (33). Anti-hanging pin shafts (38) are arranged on both sides of the anti-hanging strip (35). Guide grooves (39) parallel to the inclined direction of the lower inclined surface (33) are opened on both side walls of the first anti-hanging groove (36), and the anti-hanging pin shafts (38) are slidably arranged in the guide grooves (39). A lateral driving plate (40). A second anti-hanging groove (41) is opened in the second lower template (32), and a lateral driving plate (40) is slidably arranged in the second anti-hanging groove (41). A straight groove (42) and an inclined groove (43) are opened on the lateral driving plate (40). The lower end of the above anti-hanging strip (35) is slidably arranged in the straight groove (42), and the angle between the inclined groove (43) and the straight groove (42) is 60°. An anti-hanging driving shaft (44) is vertically arranged on the lifting slide rod (14) of the lifting frame (13) that controls the first lifting pin (11), and the anti-hanging driving shaft (44) passes through the inclined groove (43) and is slidably connected to the inclined groove (43).

8. A trimming method for a quick forging trimming device of a valve blank (5) as described in claim 7, characterized in that, Including the following steps: S1: Trimming. Place the valve blank (5) with flash (25) at the orifice of the blanking hole (10) of the lower die assembly (6), with the flash (25) resting on the surface of the lower die assembly (6). The pressing rod (3) drives the upper die assembly (1) to press down, so that after the valve blank (5) is trimmed by the trimming knife (4), it is discharged from the blanking hole (10). S2: Tilt and lift for downward sliding. The lifting component (8) tilts and lifts the flash (25) remaining on the lower die component (6) after trimming towards the scrap discharging side (9), causing the flash (25) to naturally tilt and slide towards the scrap discharging side (9) under the action of gravity; S3: Rear lift and downward sliding. After the first lifting pin (11) stops upward lifting, the first lifting pin (11) continues to lift to provide an initial driving force for the flash (25) to slide towards the scrap discharging side (9); S4: Anti-hanging and promoting sliding. The anti-hanging component (34) helps the flash (25) that has not slid out of the downward sliding inclined surface (33) to slide out of the lower die component (6).

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