Workpiece forging and stamping forming die and forming process

Abstract

The invention belongs to the field of workpiece forging, and particularly relates to a workpiece forging punch forming die and process, the workpiece forging punch forming die comprises a base, the bottom of the base is fixedly connected with supporting legs, the top of the base is fixedly connected with two side plates, and the tops of the two side plates are fixedly connected with a supporting plate; according to the workpiece forging and stamping forming die and the forming process, after the top die obtained after forging and stamping is taken back, the top die continues to be controlled to move upwards, the clamping block is hooked through the support, the bottom die is driven to move upwards and start to be turned over, and after the bottom die is turned over by 180 degrees, oxide skin falling off from a blank falls off from the bottom die; when the bottom die is overturned by 180 degrees, the clamping block is separated from the support under the action of the unlocking unit, at the moment, the sliding block is driven to move downwards under the action of the gravity of the bottom die and the tensile force of the tension spring, and similarly, under the action of the rack, the rotating shaft rotates backwards by 180 degrees, the bottom die is driven to be overturned backwards by 180 degrees, and the bottom die is reset.

Description

Technical Field

[0001] The invention belongs to the field of workpiece forging, in particular to a workpiece forging stamping forming die and a forming process. Background Art

[0002] The valve body is a key component in the valve structure. The valve body is usually a component with a specific geometric shape. Common shapes include spherical and conical shapes. This shape is conducive to achieving a good sealing effect inside the valve. When the valve body fits tightly with the valve seat, it can effectively prevent the flow of the medium. Since the valve body needs to withstand a certain pressure and ensure good wear resistance and corrosion resistance, the preparation of the valve body generally adopts an integrated forging and stamping process.

[0003] Before forging and stamping the blank, it is necessary to heat the blank, and put it into the forming mold for forging and stamping after it is red-hot. However, when the blank is red-hot, a violent oxidation reaction occurs between the blank and the oxygen in the air, and a layer of oxide scale is formed on the surface of the blank. During the stamping process, due to the pressure of the mold on the blank, the oxide scale is very easy to peel off from the surface of the blank and fall into the mold. The existing technology is not convenient for removing the oxide scale in the mold. When stamping the next blank, the residual oxide scale will cause the surface of the valve body after stamping to be bumpy, and it is not convenient to cool the valve body in time after the stamping is completed. The valve body is in a high temperature state and is prone to deformation. If it is not cooled in time, the valve body may continue to deform due to its own gravity or slight external force during the subsequent transportation or placement process, resulting in dimensional deviation. Secondly, the temperature of the valve body after hot stamping is high, it is in an expanded state and the surface is relatively soft, it is easy to adhere to the mold, and it is difficult to remove the valve body from the mold.

[0004] To this end, the present invention provides a workpiece forging and stamping forming die and a forming process. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art and solve the problem that it is inconvenient to remove the oxide scale in the mold, when stamping the next blank, the residual oxide scale will cause the surface of the valve body after stamping to be bumpy, and it is not convenient to cool the valve body in time after stamping. The valve body is in a high temperature state and is prone to deformation. If it is not cooled in time, the valve body may continue to deform due to its own gravity or slight external force during subsequent transportation or placement, resulting in dimensional deviation. Secondly, the temperature of the valve body after hot stamping is high, it is in an expanded state and the surface is relatively soft, it is easy to adhere to the mold, and it is difficult to remove the valve body from the mold. The present invention proposes a workpiece forging stamping forming mold and forming process.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a workpiece forging and stamping forming die and forming process described in the present invention include a base, the bottom of the base is fixedly connected with a support foot, the top of the base is fixedly connected with two side plates, the tops of the two side plates are fixedly connected with a support plate, the inner walls of the two side plates are slidably connected with sliders, the sides of the two sliders close to each other are rotatably connected with a rotating shaft, a bottom die is fixedly connected between the two rotating shafts, both sides of the bottom die are fixedly connected with support blocks, the bottom of the bottom die is fixedly connected with a counterweight plate, the bottom of the support plate is fixedly connected with a hydraulic cylinder, and the output end of the hydraulic cylinder is fixedly connected with a top die.

[0007] Preferably, the inner wall of the bottom mold is slidably connected with a push rod, the top of the push rod passes through the bottom mold and is fixedly connected with a top plate, the bottom of the push rod is fixedly connected with a connecting plate, the top of the connecting plate is symmetrically fixedly connected with two lower pressure plates, the tops of the two lower pressure plates both pass through the bottom mold and are fixedly connected with lower pressure blocks, the outer wall of the push rod is fixedly connected with a limiting plate, the outer wall of the push rod is sleeved with a first spring, the top of the first spring is fixedly connected to the limiting plate, the bottom of the first spring is fixedly connected to the bottom mold, the top plate, lower pressure plate, connecting plate, lower pressure block and limiting plate are all slidably connected to the bottom mold.

[0008] Preferably, a placement groove is provided at the top of the top plate, and four clamping blocks are equidistantly slidably connected to the inner wall of the top plate, one end of the four clamping blocks extends into the interior of the placement groove, the tops of the four clamping blocks are arranged as inclined surfaces, and four second springs are equidistantly fixedly connected to the interior of the top plate, and the four second springs are fixedly connected to the four clamping blocks, respectively.

[0009] Preferably, the outer walls of the two rotating shafts are fixedly connected with gears, the outer walls of the two side plates are fixedly connected with racks, the two gears are respectively meshed with the two racks, the bottoms of the two sliders are fixedly connected with tension springs, the two tension springs are fixedly connected to the base, and the outer wall of the top mold is provided with a linkage assembly.

[0010] Preferably, the linkage assembly includes two slides, and the two slides are symmetrically fixed on both sides of the top mold, and the bottoms of the two slides are fixedly connected to brackets, and the two brackets are arranged in an L shape. A through groove is provided inside the slider, and the bracket fits the inner wall of the through groove. The inner wall of the slider is slidably connected to a card block, one end of the card block extends to the inside of the through groove, and the top of the card block is arranged as an inclined surface, and the other end of the card block is fixedly connected to a fourth spring, and the fourth spring is fixedly connected to the slider, and the inner wall of the side plate is provided with an unlocking unit.

[0011] Preferably, the unlocking unit includes a mounting plate, the mounting plate is fixedly mounted on the inner wall of the side plate, a ejector pin is fixedly connected to the bottom of the mounting plate, a through groove is formed on the top of the slider, and an inclined groove for cooperating with the ejector pin is formed on the top of the clamping block.

[0012] Preferably, a guard plate is fixedly connected to the top of the bottom mold, the guard plate is arranged in a ring shape, a slot is opened at the bottom of the top mold, and the guard plate fits the inner wall of the slot.

[0013] Preferably, a water storage chamber is provided inside the top mold, a water inlet is provided on the top of the top mold, the water inlet is communicated with the water storage chamber, a first water baffle is fixed on the top of the inner wall of the water storage chamber, a second water baffle is slidably connected to the inner wall of the first water baffle, the first water baffle and the second water baffle are both arranged in a ring shape, the bottom of the second water baffle extends to the inside of the slot and is slidably connected to the slot, a fifth spring is provided inside the first water baffle, the top of the fifth spring is fixedly connected to the first water baffle, the bottom of the fifth spring is fixedly connected to the second water baffle, a water inlet groove is provided at the bottom of the second water baffle, a water inlet hole is provided on the outer wall of the second water baffle, the water inlet hole is communicated with the water inlet groove, a drainage groove is provided on the inner wall of the guard plate, a water accumulation groove is provided inside the bottom mold, and a connecting water groove is provided inside the bottom mold and between the drainage groove and the water accumulation groove.

[0014] Preferably, the bottom of the top mold is slidably connected to a push plate, a third spring is provided inside the top mold, the top of the third spring is fixedly connected to the top mold, and the bottom of the third spring is fixedly connected to the push plate.

[0015] A forming process of a workpiece forging and stamping forming die, the forming process is applicable to the above-mentioned workpiece forging and stamping forming die, and the forming process steps are as follows: S1: Fill the water storage chamber with water, place the blank into the placement groove in the top plate, and center the blank and the top plate through four clamping blocks; S2: Start the hydraulic cylinder to drive the top die to move downward, forging and stamping the blank. The stamped blank enters the die cavity of the bottom die and the top die to form a valve body. After the bottom die and the top die are connected, the water in the water storage cavity enters the bottom die to cool the valve body. The hydraulic cylinder is retracted upward to open the bottom die and the top die to take out the valve body. S3: After taking out the valve body in the bottom die, continue to control the top die to move upward. Under the action of the linkage assembly, the bottom die is driven to move upward, and after the bottom die is turned 180 degrees, the oxide scale of the blank falls off from the bottom die after stamping.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention discloses a workpiece forging and stamping forming die and forming process. After the top die is retracted after forging and stamping, the top die is continuously controlled to move upward, and the clamping block is hooked by the bracket to drive the bottom die to move upward and start to flip. After the bottom die flips 180 degrees, the oxide scale detached from the blank falls from the bottom die. When the bottom die flips 180 degrees, the clamping block is separated from the bracket under the action of the unlocking unit. At this time, under the action of the bottom die's own gravity and the tension of the tension spring, the slider is driven to move downward. Similarly, under the action of the rack, the rotating shaft is rotated back 180 degrees, driving the bottom die to flip back 180 degrees, so that the bottom die is reset.

[0017] 2. A workpiece forging and stamping forming die and forming process described in the present invention, when the top die and the bottom die are completely docked, the guard plate pushes the second water baffle to move upward, so that the water in the water storage chamber enters the water inlet trough along the water inlet hole, and enters the water accumulation trough along the drainage trough and the connecting water trough, thereby cooling the valve body in the bottom die, causing the surface of the valve body to solidify and shrink rapidly. This solidification and shrinkage prevents the surface of the valve body from sticking to the bottom die, and increases the gap between the valve body and the bottom die, thereby reducing the friction during demolding, which is beneficial for the valve body to be removed from the bottom die, and the water entering the water accumulation trough can be discharged when the bottom die is flipped.

[0018] 3. The forging and stamping die and forming process of a workpiece described in the present invention has a guard plate that is inserted into a slot when the top die and the bottom die are docked, thereby blocking the edge of the die cavity of the top die and the bottom die to prevent the blank from overflowing from the edge of the die cavity of the top die and the bottom die after extrusion deformation.

[0019] 4. The present invention describes a workpiece forging and stamping forming die and forming process. When the blank is stamped, the top plate moves in the bottom die to compress the first spring, and the push plate moves in the top die to compress the third spring. When the top die is retracted at the end of stamping, the push plate pushes the valve body to separate from the top die under the action of the third spring, and the top plate pushes the valve body to separate from the bottom die under the action of the first spring, thereby facilitating the detachment of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 is a cross-sectional view from another perspective of the present invention; Figure 4 It is a three-dimensional diagram of the first water retaining plate and the second water retaining plate of the present invention in cooperation with each other; Figure 5 It is a three-dimensional diagram of the bottom mold and the lower pressing block of the present invention in cooperation with each other; Figure 6 It is a front cross-sectional view of the bracket and the slider of the present invention in cooperation with each other; Figure 7 The present invention Figure 2 The enlarged view of point A in the middle; Figure 8 The present invention Figure 2 The enlarged view of point B in the middle; Fig. 9 The present invention Figure 3 Enlarged view of point C in the middle; In the figure: 1, base; 2, side plate; 3, support plate; 4, slider; 5, rotating shaft; 6, bottom mold; 7, support block; 8, hydraulic cylinder; 9, top mold; 10, top plate; 11, ejector rod; 12, limit plate; 13, first spring; 14, connecting plate; 15, lower pressure plate; 16, lower pressure block; 17, placement groove; 18, clamping block; 19, second spring; 20, guard plate; 21, slot; 22, third spring; 23, push plate; 24, counterweight plate; 25 , through slot; 26, block; 27, fourth spring; 28, inclined slot; 29, through slot; 30, bracket; 31, mounting plate; 32, ejector pin; 33, gear; 34, rack; 35, tension spring; 36, water storage chamber; 37, first water baffle; 38, fifth spring; 39, second water baffle; 40, water inlet trough; 41, water inlet hole; 42, drainage trough; 43, connecting water trough; 44, water trough; 45, water inlet; 46, support foot; 47, skateboard. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] like Figures 1 to 9 As shown, the present invention provides a technical solution, a workpiece forging and stamping forming die, comprising a base 1, the bottom of the base 1 is fixedly connected with a support foot 46, the top of the base 1 is fixedly connected with two side plates 2, the tops of the two side plates 2 are fixedly connected with a support plate 3, the inner walls of the two side plates 2 are slidably connected with sliders 4, the sides of the two sliders 4 close to each other are rotatably connected with a rotating shaft 5, a bottom die 6 is fixedly connected between the two rotating shafts 5, both sides of the bottom die 6 are fixedly connected with support blocks 7, the bottom of the bottom die 6 is fixedly connected with a counterweight plate 24, the bottom of the support plate 3 is fixedly connected with a hydraulic cylinder 8, and the output end of the hydraulic cylinder 8 is fixedly connected with a top die 9.

[0024] Through the above technical scheme, the bottom die 6 is supported by two support blocks 7 to stabilize the position of the bottom die 6. The blank is placed on the bottom die 6 after being heated red, and the hydraulic cylinder 8 is started to drive the top die 9 to move downward to forge and stamp the blank. The stamped blank enters the die cavity of the bottom die 6 and the top die 9 to form a valve body. After the forging and stamping is completed, the hydraulic cylinder 8 is retracted upward to open the bottom die 6 and the top die 9 to take out the valve body.

[0025] Specifically, the inner wall of the bottom mold 6 is slidably connected with a push rod 11, the top of the push rod 11 passes through the bottom mold 6 and is fixedly connected with a top plate 10, the bottom of the push rod 11 is fixedly connected with a connecting plate 14, the top of the connecting plate 14 is symmetrically fixedly connected with two lower pressure plates 15, the tops of the two lower pressure plates 15 both pass through the bottom mold 6 and are fixedly connected with a lower pressure block 16, the outer wall of the push rod 11 is fixedly connected with a limiting plate 12, the outer wall of the push rod 11 is sleeved with a first spring 13, the top of the first spring 13 is fixedly connected to the limiting plate 12, the bottom of the first spring 13 is fixedly connected to the bottom mold 6, the top plate 10, the lower pressure plate 15, the connecting plate 14, the lower pressure block 16, and the limiting plate 12 are all slidably connected to the bottom mold 6.

[0026] Through the above technical scheme, the blank is placed on the top plate 10 after being heated red. When the top die 9 punches the blank, the blank and the lower pressing block 16 are driven downward under the action of pressure, so that the two lower pressing plates 15 move downward, the connecting plate 14 moves downward, and the top rod 11 moves downward, pressing the first spring 13. After the forging and stamping of the blank is completed, the top die 9 is retracted upward, and under the action of the first spring 13, the top plate 10 can be driven to move upward to help the valve body to be demolded.

[0027] Specifically, a placement groove 17 is opened at the top of the top plate 10, and four clamping blocks 18 are equidistantly slidably connected to the inner wall of the top plate 10, one end of the four clamping blocks 18 extends to the inside of the placement groove 17, and the tops of the four clamping blocks 18 are set as inclined surfaces. Four second springs 19 are equidistantly fixedly connected to the inside of the top plate 10, and the four second springs 19 are fixedly connected to the four clamping blocks 18 respectively.

[0028] Through the above technical solution, the blank is heated red and placed in the placement groove 17 and pressed downward. The bottom of the blank is pressed against the inclined surfaces of the four clamping blocks 18. As the blank moves downward, the four clamping blocks 18 are pushed to move toward the inside of the top plate 10, pressing the four second springs 19. After the blank passes through the four clamping blocks 18, the blank is released, and under the action of the four second springs 19, the four clamping blocks 18 are reset, thereby helping the blank to be centered on the top plate 10 to prevent the blank from being squeezed to one side during the stamping process of the top die 9.

[0029] Specifically, the outer walls of the two rotating shafts 5 are fixedly connected with gears 33, the outer walls of the two side panels 2 are fixedly connected with racks 34, the two gears 33 are respectively meshed with the two racks 34, the bottoms of the two sliders 4 are fixedly connected with tension springs 35, the two tension springs 35 are fixedly connected to the base 1, and the outer wall of the top mold 9 is provided with a linkage assembly.

[0030] Through the above technical solution, after taking out the valve body in the bottom mold 6, continue to control the top mold 9 to move upward, and under the action of the linkage assembly, drive the two sliders 4 to move upward, pull the tension spring 35, and the two sliders 4 move upward to drive the two gears 33 to move upward, so that the bottom mold 6 moves upward. When the two gears 33 move to the position of the two racks 34, the bottom mold 6 is separated from the base 1. As the two sliders 4 continue to move upward, under the action of the two racks 34, the two gears 33 are driven to rotate, so that the two rotating shafts 5 rotate at the same time, driving the bottom mold 6 to start flipping. After the bottom mold 6 flips 180 degrees, the oxide scale that falls off the blank falls from the bottom mold 6.

[0031] Specifically, the linkage assembly includes two slides 47, and the two slides 47 are symmetrically fixed on both sides of the top mold 9. The bottoms of the two slides 47 are fixedly connected with brackets 30, and the two brackets 30 are both arranged in an L shape. A through groove 25 is opened inside the slider 4, and the bracket 30 fits the inner wall of the through groove 25. The inner wall of the slider 4 is slidably connected with a block 26, and one end of the block 26 extends to the inside of the through groove 25. The top of the block 26 is arranged as an inclined surface, and the other end of the block 26 is fixedly connected with a fourth spring 27, and the fourth spring 27 is fixedly connected to the slider 4. The inner wall of the side panel 2 is provided with an unlocking unit.

[0032] Through the above technical solution, when the top die 9 moves downward to forge and stamp the blank, the two slide plates 47 are driven to move downward, so that the two brackets 30 move downward. When the bracket 30 enters the through groove 25, the raised end at the bottom thereof abuts against the inclined surface at the top of the clamping block 26. Under the extrusion of the bracket 30, the clamping block 26 is pushed to move inside the slider 4, and the fourth spring 27 is pressed. When the raised end at the bottom of the bracket 30 passes through the clamping block 26, the clamping block 26 is driven to reset under the action of the fourth spring 27. When the top die 9 is controlled to move upward, The raised end at the bottom of the bracket 30 hooks the block 26, and under the pulling of the bracket 30, the block 26 is driven to move upward, so that the slider 4 moves upward, and the bottom mold 6 moves upward. When the bottom mold 6 flips over 180 degrees, the unlocking unit causes the block 26 to separate from the bracket 30. At this time, under the action of the bottom mold 6's own gravity and the tension of the tension spring 35, the slider 4 is driven to move downward. Similarly, under the action of the rack 34, the rotating shaft 5 is rotated back 180 degrees, driving the bottom mold 6 to flip back 180 degrees, so that the bottom mold 6 is reset.

[0033] Specifically, the unlocking unit includes a mounting plate 31, which is fixedly mounted on the inner wall of the side plate 2, a pin 32 is fixedly connected to the bottom of the mounting plate 31, a through groove 29 is formed on the top of the slider 4, and an inclined groove 28 is formed on the top of the block 26 for use with the pin 32.

[0034] Through the above technical solution, when the two rotating shafts 5 move upward and rotate one hundred and eighty degrees, as the slider 4 moves upward, the ejector pin 32 is inserted into the slider 4 along the through groove 29 and presses against the inclined groove 28 at the top of the block 26. Under the extrusion of the ejector pin 32, the block 26 is pushed to move toward the inside of the slider 4, pressing the fourth spring 27. After the limit of the block 26 is lost, the slider 4 is driven to move downward under the action of the gravity of the bottom mold 6 itself and the tension of the tension spring 35.

[0035] Specifically, a guard plate 20 is fixedly connected to the top of the bottom mold 6 , and the guard plate 20 is arranged in a ring shape. A slot 21 is opened at the bottom of the top mold 9 , and the guard plate 20 fits the inner wall of the slot 21 .

[0036] Through the above technical scheme, by setting the guard plate 20, when the top mold 9 and the bottom mold 6 are docked, the guard plate 20 is inserted into the slot 21 to block the edge of the mold cavity of the top mold 9 and the bottom mold 6, thereby preventing the blank from overflowing from the edge of the mold cavity of the top mold 9 and the bottom mold 6 after extrusion deformation.

[0037] Specifically, a water storage chamber 36 is provided inside the top mold 9, a water inlet 45 is provided on the top of the top mold 9, the water inlet 45 is communicated with the water storage chamber 36, a first water baffle 37 is fixed to the top of the inner wall of the water storage chamber 36, a second water baffle 39 is slidably connected to the inner wall of the first water baffle 37, the first water baffle 37 and the second water baffle 39 are both arranged in an annular shape, the bottom of the second water baffle 39 extends to the inside of the slot 21 and is slidably connected to the slot 21, and a fifth spring is arranged inside the first water baffle 37 38, the top of the fifth spring 38 is fixedly connected to the first water baffle plate 37, the bottom of the fifth spring 38 is fixedly connected to the second water baffle plate 39, a water inlet groove 40 is provided at the bottom of the second water baffle plate 39, a water inlet hole 41 is provided on the outer wall of the second water baffle plate 39, the water inlet hole 41 is communicated with the water inlet groove 40, a drainage groove 42 is provided on the inner wall of the guard plate 20, a water accumulation groove 44 is provided inside the bottom mold 6, and a connecting water groove 43 is provided inside the bottom mold 6 and between the drainage groove 42 and the water accumulation groove 44.

[0038] By means of the above technical scheme, water is filled into the water storage chamber 36 through the water inlet 45, and the second water baffle 39 is provided to prevent water from falling from the slot 21. When the top mold 9 is fully docked with the bottom mold 6, the guard plate 20 pushes the second water baffle 39 to move upward, compressing the fifth spring 38. After the second water baffle 39 moves upward, it drives the water inlet hole 41 to enter the water storage chamber 36. At this time, the water in the water storage chamber 36 enters the water inlet groove 40 along the water inlet hole 41, and enters the water accumulation groove 44 along the drainage groove 42 and the connecting water groove 43, thereby cooling the valve body in the bottom mold 6, causing the surface of the valve body to solidify quickly and shrink. This solidification and shrinkage prevents the surface of the valve body from sticking to the bottom mold 6, and increases the gap between the valve body and the bottom mold 6, thereby reducing the friction during demoulding, which is conducive to the valve body being removed from the bottom mold 6. The water entering the water accumulation groove 44 can be discharged when the bottom mold 6 is flipped.

[0039] Specifically, the bottom of the top mold 9 is slidably connected with a push plate 23 , a third spring 22 is provided inside the top mold 9 , the top of the third spring 22 is fixedly connected to the top mold 9 , and the bottom of the third spring 22 is fixedly connected to the push plate 23 .

[0040] Through the above technical solution, when the blank on the top plate 10 is forged and stamped, under the action of pressure, the push plate 23 slides upward in the top die 9, pressing the third spring 22. After the forging and stamping of the blank is completed, the top die 9 is retracted upward. Under the action of the third spring 22, the push plate 23 can be driven to move downward, helping to separate the valve body from the top die 9.

[0041] A forming process of a workpiece forging and stamping forming die, the forming process is applicable to the above-mentioned workpiece forging and stamping forming die, and the forming process steps are as follows: S1: Fill the water storage chamber 36 with water, place the blank into the placement groove 17 in the top plate 10, and center the blank and the top plate 10 through four clamping blocks 18; S2: Start the hydraulic cylinder 8 to drive the top die 9 to move downward, forging and stamping the blank. The stamped blank enters the die cavity of the bottom die 6 and the top die 9 to form a valve body. After the bottom die 6 and the top die 9 are docked, the water in the water storage chamber 36 enters the bottom die 6 to cool the valve body. The hydraulic cylinder 8 is retracted upward to open the bottom die 6 and the top die 9 to take out the valve body. S3: After taking out the valve body in the bottom die 6, continue to control the top die 9 to move upward. Under the action of the linkage assembly, the bottom die 6 is driven to move upward, and after the bottom die 6 is turned over 180 degrees, the oxide scale of the blank falls off from the bottom die 6 after stamping.

[0042] When in use, water is filled into the water storage chamber 36 through the water inlet 45, and the second water baffle 39 is provided to prevent water from falling from the slot 21. The blank is heated red and placed in the placement slot 17 and pressed downward. The bottom of the blank is pressed against the inclined surfaces of the four clamping blocks 18. As the blank moves downward, the four clamping blocks 18 are pushed to move toward the inside of the top plate 10, and the four second springs 19 are pressed. After the blank passes through the four clamping blocks 18, the blank is released. Under the action of the four second springs 19, the four clamping blocks 18 are reset, thereby helping the blank to be centered on the top plate 10 and preventing the blank from being squeezed to one side during the stamping process of the top die 9. The hydraulic cylinder 8 is started to drive the top die 9 to move downward, and the blank is forged and stamped. The stamped blank enters the bottom die 6 and the top die 9, a valve body is formed. Through the provided guard plate 20, when the top die 9 and the bottom die 6 are butted, the guard plate 20 is inserted into the slot 21 to block the edge of the die cavity of the top die 9 and the bottom die 6 to prevent the blank from overflowing from the edge of the die cavity of the top die 9 and the bottom die 6 after extrusion deformation. When the top die 9 moves downward to forge and stamp the blank, the two slide plates 47 are driven to move downward, so that the two brackets 30 move downward. When the bracket 30 enters the through groove 25, the raised end at the bottom thereof abuts against the inclined surface at the top of the block 26. Under the extrusion of the bracket 30, the block 26 is pushed to move inside the slider 4, pressing the fourth spring 27. When the raised end at the bottom of the bracket 30 passes through the block 26, the block 26 is driven to reset under the action of the fourth spring 27. When the top die 9 When it is fully docked with the bottom mold 6, the guard plate 20 pushes the second water baffle plate 39 to move upward, compressing the fifth spring 38. After the second water baffle plate 39 moves upward, it drives the water inlet hole 41 to enter the water storage chamber 36. At this time, the water in the water storage chamber 36 enters the water inlet groove 40 along the water inlet hole 41, and enters the water accumulation groove 44 along the drainage groove 42 and the connecting water groove 43, thereby cooling the valve body in the bottom mold 6, so that the surface of the valve body is quickly solidified and shrunk. This solidification and shrinkage prevents the surface of the valve body from sticking to the bottom mold 6, and increases the gap between the valve body and the bottom mold 6, thereby reducing the friction during demoulding, which is conducive to the valve body being released from the bottom mold 6. When the top mold 9 punches the blank, under the action of pressure, the blank and the lower pressing block 16 are driven to move downward. The first spring 13 is pulled by the support 30, and the push plate 23 is pulled upward in the top die 9 to press the third spring 22. After the forging and stamping of the blank is completed, the top die 9 is retracted upward. Under the action of the third spring 22, the push plate 23 can be driven to move downward to help the valve body to separate from the top die 9. Under the action of the first spring 13, the top plate 10 can be driven to move upward to help the valve body to separate from the bottom die 6. After taking out the valve body in the bottom die 6, the top die 9 is continued to be controlled to move upward. The raised end at the bottom of the bracket 30 hooks the card block 26. Under the pulling of the bracket 30, the card block 26 is driven to move upward, so that the two sliders 4 move upward and the tension spring 35 is pulled open.The two sliders 4 move upwards, driving the two gears 33 to move upwards, causing the bottom die 6 to move upwards. When the two gears 33 move to the position of the two racks 34, the bottom die 6 is separated from the base 1. As the two sliders 4 continue to move upwards, under the action of the two racks 34, the two gears 33 are driven to rotate, causing the two shafts 5 to rotate at the same time, driving the bottom die 6 to start flipping. After the bottom die 6 flips 180 degrees, the oxide scale shed from the blank falls from the bottom die 6. When the two shafts 5 move upwards and rotate 180 degrees, As the slider 4 moves upward, the ejector pin 32 is inserted into the slider 4 along the through slot 29 and pressed against the inclined slot 28 at the top of the block 26. Under the pressure of the ejector pin 32, the block 26 is pushed to move inside the slider 4, pressing the fourth spring 27. After the block 26 is no longer limited, the slider 4 is driven downward by the gravity of the bottom mold 6 and the tension of the tension spring 35. Similarly, under the action of the rack 34, the shaft 5 is rotated back 180 degrees, driving the bottom mold 6 to flip back 180 degrees, so that the bottom mold 6 is reset.

[0043] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A workpiece forging and stamping die, characterized in that: The invention comprises a base (1), wherein the bottom of the base (1) is fixedly connected to a support foot (46), the top of the base (1) is fixedly connected to two side plates (2), the tops of the two side plates (2) are fixedly connected to a support plate (3), the inner walls of the two side plates (2) are slidably connected to a slider (4), the sides of the two sliders (4) close to each other are rotatably connected to a rotating shaft (5), a bottom mold (6) is fixedly connected between the two rotating shafts (5), both sides of the bottom mold (6) are fixedly connected to support blocks (7), the bottom of the bottom mold (6) is fixedly connected to a counterweight plate (24), the bottom of the support plate (3) is fixedly connected to a hydraulic cylinder (8), and the output end of the hydraulic cylinder (8) is fixedly connected to a top mold (9).

2. A workpiece forging and stamping die according to claim 1, characterized in that: The inner wall of the bottom mold (6) is slidably connected to a push rod (11), the top of the push rod (11) passes through the bottom mold (6) and is fixedly connected to a top plate (10), the bottom of the push rod (11) is fixedly connected to a connecting plate (14), the top of the connecting plate (14) is symmetrically fixedly connected to two lower pressing plates (15), the tops of the two lower pressing plates (15) both pass through the bottom mold (6) and are fixedly connected to a lower pressing block (16), the outer wall of the push rod (11) is fixedly connected to a limiting plate (12), the outer wall of the push rod (11) is sleeved with a first spring (13), the top of the first spring (13) is fixedly connected to the limiting plate (12), the bottom of the first spring (13) is fixedly connected to the bottom mold (6), and the top plate (10), the lower pressing plate (15), the connecting plate (14), the lower pressing block (16), and the limiting plate (12) are all slidably connected to the bottom mold (6).

3. A workpiece forging and stamping die according to claim 2, characterized in that: A placement groove (17) is provided at the top of the top plate (10), and four clamping blocks (18) are equidistantly slidably connected to the inner wall of the top plate (10), one end of each of the four clamping blocks (18) extends into the interior of the placement groove (17), and the tops of the four clamping blocks (18) are arranged as inclined surfaces. Four second springs (19) are equidistantly fixedly connected to the interior of the top plate (10), and the four second springs (19) are fixedly connected to the four clamping blocks (18), respectively.

4. A workpiece forging and stamping die according to claim 3, characterized in that: The outer walls of the two rotating shafts (5) are fixedly connected with gears (33), the outer walls of the two side plates (2) are fixedly connected with racks (34), the two gears (33) are respectively meshed with the two racks (34), the bottoms of the two sliders (4) are fixedly connected with tension springs (35), the two tension springs (35) are fixedly connected with the base (1), and the outer wall of the top mold (9) is provided with a linkage assembly.

5. A workpiece forging and stamping die according to claim 4, characterized in that: The linkage assembly comprises two slide plates (47), the two slide plates (47) are symmetrically fixedly mounted on both sides of the top mold (9), the bottoms of the two slide plates (47) are fixedly connected to brackets (30), the two brackets (30) are both arranged in an L shape, a through groove (25) is provided inside the slider (4), the bracket (30) fits the inner wall of the through groove (25), a clamping block (26) is slidably connected to the inner wall of the slider (4), one end of the clamping block (26) extends to the inside of the through groove (25), the top of the clamping block (26) is arranged as an inclined surface, the other end of the clamping block (26) is fixedly connected to a fourth spring (27), the fourth spring (27) is fixedly connected to the slider (4), and an unlocking unit is arranged on the inner wall of the side plate (2).

6. A workpiece forging and stamping die according to claim 5, characterized in that: The unlocking unit comprises a mounting plate (31), the mounting plate (31) being fixedly mounted on the inner wall of the side plate (2), a top of the mounting plate (31) being fixedly connected to a ejector pin (32), a top of the sliding block (4) being provided with a through slot (29), and a top of the clamping block (26) being provided with an inclined slot (28) for use with the ejector pin (32).

7. A workpiece forging and stamping die according to claim 6, characterized in that: A guard plate (20) is fixedly connected to the top of the bottom mold (6), and the guard plate (20) is arranged in a ring shape. A slot (21) is provided at the bottom of the top mold (9), and the guard plate (20) fits the inner wall of the slot (21).

8. A workpiece forging and stamping die according to claim 7, characterized in that: A water storage chamber (36) is provided inside the top mold (9), a water inlet (45) is provided on the top of the top mold (9), the water inlet (45) is communicated with the water storage chamber (36), a first water baffle (37) is fixed to the top of the inner wall of the water storage chamber (36), a second water baffle (39) is slidably connected to the inner wall of the first water baffle (37), the first water baffle (37) and the second water baffle (39) are both arranged in an annular shape, the bottom of the second water baffle (39) extends to the inside of the slot (21) and is slidably connected to the slot (21), a fifth spring (38) is provided inside the first water baffle (37), The top of the fifth spring (38) is fixedly connected to the first water baffle plate (37), the bottom of the fifth spring (38) is fixedly connected to the second water baffle plate (39), a water inlet groove (40) is provided at the bottom of the second water baffle plate (39), a water inlet hole (41) is provided on the outer wall of the second water baffle plate (39), the water inlet hole (41) is communicated with the water inlet groove (40), a drainage groove (42) is provided on the inner wall of the guard plate (20), a water accumulation groove (44) is provided inside the bottom mold (6), and a connecting water groove (43) is provided inside the bottom mold (6) and located between the drainage groove (42) and the water accumulation groove (44).

9. A workpiece forging and stamping die according to claim 8, characterized in that: The bottom of the top mold (9) is slidably connected to a push plate (23), a third spring (22) is arranged inside the top mold (9), the top of the third spring (22) is fixedly connected to the top mold (9), and the bottom of the third spring (22) is fixedly connected to the push plate (23).

10. A forming process of a workpiece forging and stamping die, the forming process being applicable to the workpiece forging and stamping die as claimed in claim 9, characterized in that: The molding process steps are as follows: S1: Fill the water storage chamber (36) with water, place the blank into the placement groove (17) in the top plate (10), and center the blank and the top plate (10) using four clamping blocks (18); S2: The hydraulic cylinder (8) is started to drive the top die (9) to move downward, and the blank is forged and punched. The punched blank enters the die cavity of the bottom die (6) and the top die (9) to form a valve body. After the bottom die (6) and the top die (9) are butted, water in the water storage chamber (36) enters the bottom die (6) to cool the valve body. The hydraulic cylinder (8) is retracted upward to open the bottom die (6) and the top die (9) to remove the valve body. S3: After the valve body in the bottom die (6) is taken out, the top die (9) is controlled to move upwards. Under the action of the linkage assembly, the bottom die (6) is driven to move upwards, and the bottom die (6) is turned 180 degrees. The oxide scale of the blank that falls off after stamping falls out of the bottom die (6).

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