Powder metallurgy valve guide pipe forming die

Abstract

The utility model relates to the technical field of powder metallurgy, and discloses a powder metallurgy valve guide pipe forming die which comprises an upper punching mechanism arranged above a fixed die base, a floating female die installed on the top of the fixed die base, a lower punching die inserted into the bottom of the floating female die, and a T-shaped cavity formed in the fixed die base. A damping mechanism is arranged at the T-shaped cavity in the fixed mold base; according to the technical scheme, the top of the floating female die is filled with powder, the powder is gradually and compactly formed through contact of the upper punching mechanism and the lower punch, when the lower punch is subjected to downward pressure of the upper punching mechanism, the movable arm rotates along with displacement of the lower punch along with increase of the pressure, the lower punch can conduct displacement movement in a small range, and therefore the powder can be tightly formed. And meanwhile, the spring is compressed when the lower die punch moves downwards, and the spring absorbs and disperses impact energy after being compressed, so that cracks and deformation caused by vibration in the valve guide pipe forming process are reduced, and the surface quality of a formed part is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder metallurgy technical field, concretely is a powder metallurgy air valve guide pipe forming die. BACKGROUND

[0002] Powder metallurgy is the process technology of preparing metal powder or using metal powder as raw material, through forming and sintering, to manufacture metal materials, composite materials and various types of products.

[0003] When the upper die punch and the lower die punch contact and the pressure is applied, due to the compression characteristics of the powder material and the rigidity of the die structure, a large impact energy is often generated, which further affects the surface quality and dimensional accuracy of the formed part.

[0004] Therefore, the application provides a powder metallurgy air valve guide pipe forming die. UTILITY MODEL CONTENTS

[0005] The utility model discloses a powder metallurgy air valve guide pipe forming die, solve the problem raised in the background art.

[0006] The application embodiment provides a powder metallurgy air valve guide pipe forming die, which comprises an upper punch mechanism arranged above a fixed die seat, a floating female die is installed on the top of the fixed die seat, a lower die punch is inserted into the bottom of the floating female die, a T-shaped cavity is formed in the inside of the fixed die seat, a damping mechanism is arranged in the T-shaped cavity in the inside of the fixed die seat, the damping mechanism comprises a rectangular plate clamped at the T-shaped cavity, two groups of rectangular blocks are fixedly installed at the top end of the rectangular plate, a fixed arm is fixedly installed at the top of the rectangular block, a connecting block is fixedly installed on both sides of the lower die punch, a movable arm is hinged on the side of the connecting block away from the lower die punch, and the movable arm is hinged at the end close to the fixed arm, two groups of springs are installed at the bottom end of the lower die punch, and the bottom end of the spring is installed at the top end of the rectangular plate.

[0007] By adopting the above technical scheme, the powder is filled into the top of the floating female die, and the upper punch mechanism and the lower die punch are contacted, so that it is gradually densified and formed, when the lower die punch is subjected to the downward pressure of the upper punch mechanism, with the increase of the pressure, the movable arm rotates with the displacement of the lower die punch, so that the lower die punch can displace in a small range, and the spring is compressed when the lower die punch displaces downward, the spring absorbs and disperses the impact energy after being compressed, thereby reducing the cracks and deformation caused by vibration during the forming process of the air valve guide pipe, and improving the surface quality of the formed part.

[0008] Optionally, the upward pushing mechanism comprises four groups of vertical rods, the four groups of vertical rods are respectively installed at the top of the four corners of the fixed mold base, the top of the four groups of vertical rods is fixedly installed with a horizontal plate, the bottom of the horizontal plate is fixedly installed with a first hydraulic rod, and the telescopic end of the first hydraulic rod is fixedly installed with an upper mold punch.

[0009] By adopting the above technical scheme, the horizontal plate is supported by the four groups of vertical rods, the first hydraulic rod is started to extend, the upper mold punch is pushed to move downward, the upper mold punch and the floating female mold are in close contact, then the upper mold punch continues to move downward until it contacts with the lower mold punch, so that gradually increasing pressure is applied to the powder to gradually densify the powder, then the first hydraulic rod starts to contract, the upper mold punch rises and separates from the lower mold punch, then the formed valve guide is subjected to subsequent demolding and processing work, the pressure is accurately controlled by the hydraulic drive of the first hydraulic rod, and the pressing process is more stable and controllable.

[0010] Optionally, the top of the rectangular plate is installed with a pressure sensor, and the detection end of the pressure sensor is in contact with the bottom end of the two groups of springs.

[0011] By adopting the above technical scheme, the pressure received by the spring is monitored by the pressure sensor, the device is controlled, and the practicability during use is improved.

[0012] Optionally, the top of the horizontal plate is fixedly installed with a controller, the pressure sensor is in signal connection with the controller, and the controller is in electrical connection with the control end of the first hydraulic rod.

[0013] By adopting the above technical scheme, the signal is transmitted to the controller by the pressure sensor, the controller controls the work of the first hydraulic rod according to the signal, automatic control is realized, human operation errors are reduced, and the production efficiency and precision are effectively improved.

[0014] Optionally, the inside of the spring is provided with a damper, the bottom end of the damper is installed at the top of the rectangular plate, and the telescopic end of the damper is installed at the bottom end of the lower mold punch.

[0015] By adopting the above technical scheme, the vibration energy generated in the compression and release process of the spring is consumed by the damper, and the damping effect is further improved.

[0016] Optionally, a fixed block is fixedly installed at the top of the fixed mold base on one side of the floating female mold, a vertical block is fixedly installed at the top of the fixed block, an electric push rod is fixedly installed on one side of the vertical block, a powder box is fixedly installed at the telescopic end of the electric push rod, a feeding pipe is fixedly installed at the top of the powder box, a discharging port is formed in the bottom of the powder box, a second hydraulic rod is installed in the inside of the fixed mold base below the rectangular plate, and the telescopic end of the second hydraulic rod is fixedly installed at the bottom end of the rectangular plate.

[0017] By adopting the technical scheme, the powder box is pushed by the electric push rod to make the powder discharge port enter the top of the floating female mold, automatic powder filling is realized, and meanwhile, when the valve guide is pressed and formed, the lower mold punch is pushed up by the second hydraulic rod to push out the formed valve guide, the powder box pushes out the demolded valve guide while the electric push rod pushes the powder box to add powder, and then automatic powder filling is performed, thereby improving the continuity of work.

[0018] Optionally, two groups of guide grooves are arranged in the inner part of the fixed mold base, and guide blocks are fixedly installed on the two sides of the rectangular plate and are slidably connected to the adjacent guide grooves.

[0019] By adopting the technical scheme, the guide blocks on the two sides of the rectangular plate are slid in the guide grooves during the displacement of the rectangular plate driven by the second hydraulic rod, and the guide blocks and the guide grooves are beneficial to guarantee the vertical movement of the rectangular plate.

[0020] Optionally, an elastic gasket is fixedly installed at the top end of the lower mold punch.

[0021] By adopting the technical scheme, the elastic gasket provides certain buffering and support when the upper mold punch and the lower mold punch are in contact and pressed, thereby being beneficial to protecting the upper mold punch and the lower mold punch from direct impact.

[0022] Compared with the prior art, the technical scheme has the following beneficial effects:

[0023] 1. The powder is filled into the top of the floating female mold, the upper punch mechanism is in contact with the lower mold punch, the powder is gradually densified and formed, when the lower mold punch is subjected to the downward pressure of the upper punch mechanism, the movable arm rotates with the displacement of the lower mold punch, the lower mold punch can be displaced in a small range, the spring is compressed when the lower mold punch is displaced downward, the spring absorbs and disperses the impact energy after being compressed, thereby reducing the cracks and deformation of the valve guide caused by vibration during the forming process, and the surface quality of the formed part is improved.

[0024] 2. The cross plate is supported by the four groups of vertical rods, the first hydraulic rod is started to be elongated to push the upper mold punch to move downward, the upper mold punch is in close contact with the floating female mold, and then continues to move downward until the upper mold punch is in contact with the lower mold punch, so that the gradually increasing pressure is applied to the powder to gradually densify and form the powder, then the first hydraulic rod starts to contract, the upper mold punch rises and is separated from the lower mold punch, and then the formed valve guide is subjected to subsequent demolding and processing work, the pressure is accurately controlled by the hydraulic drive of the first hydraulic rod, so that the pressing process is more stable and controllable. BRIEF DESCRIPTION OF DRAWINGS

[0025] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, taken in conjunction with the accompanying drawings:

[0026] Figure 1 is a schematic diagram of the internal structure of the present application;

[0027] Figure 2 is a schematic diagram of the damping mechanism structure;

[0028] Figure 3 is a schematic diagram of part of the structure of the present application;

[0029] Figure 4 is a schematic diagram of the internal structure of the spring.

[0030] In the figure: 1, fixed die seat; 2, vertical rod; 3, cross plate; 4, first hydraulic rod; 5, upper die punch; 6, floating female die; 7, damping mechanism; 701, rectangular plate; 702, rectangular block; 703, fixed arm; 704, connecting block; 705, movable arm; 706, spring; 707, pressure sensor 8, lower die punch; 9, controller; 10, damper; 11, fixed block; 12, vertical block; 13, electric push rod; 14, powder box; 15, feed pipe; 16, discharge port; 17, second hydraulic rod; 18, guide groove; 19, guide block; 20, elastic gasket. DETAILED DESCRIPTION

[0031] Please refer to Figures 1-3 The present application provides a technical scheme: the upper punch mechanism is arranged above the fixed die seat 1, the floating female die 6 is installed on the top of the fixed die seat 1, the lower die punch 8 is inserted into the bottom of the floating female die 6, the T-shaped cavity is arranged in the inside of the fixed die seat 1, the damping mechanism 7 is arranged in the inside of the fixed die seat 1 at the T-shaped cavity, the damping mechanism 7 comprises the rectangular plate 701 which is clamped at the T-shaped cavity, the two groups of rectangular blocks 702 are fixedly installed on the top end of the rectangular plate 701, the fixed arms 703 are fixedly installed on the top of the rectangular blocks 702, the connecting blocks 704 are fixedly installed on the two sides of the lower die punch 8, the movable arms 705 are hingedly connected to the side of the connecting blocks 704 away from the lower die punch 8, and the movable arms 705 are hingedly connected to the end of the fixed arms 703 close to each other, the two groups of springs 706 are installed on the bottom end of the lower die punch 8, and the bottom end of the springs 706 is installed on the top end of the rectangular plate 701;

[0032] In the technical scheme, the powder is filled to the top of the floating cavity 6, and the upper punch mechanism is in contact with the lower punch 8 to gradually densify the forming, when the lower punch 8 is subjected to the downward pressure of the upper punch mechanism, the pressure increases, and the movable arm 705 rotates with the displacement of the lower punch 8, so that the lower punch 8 can be displaced in a small range, and the spring 706 is compressed when the lower punch 8 is displaced downward, and the spring 706 absorbs and disperses the impact energy after being compressed, thereby reducing the cracks and deformation of the valve guide caused by vibration during forming, and improving the surface quality of the formed part.

[0033] In some technical schemes, as shown in Figure 1 The upper punch mechanism includes four sets of vertical rods 2, which are respectively installed at the top four corners of the fixed die seat 1, the top end of the four sets of vertical rods 2 is fixedly installed with a horizontal plate 3, the bottom of the horizontal plate 3 is fixedly installed with a first hydraulic rod 4, and the extension end of the first hydraulic rod 4 is fixedly installed with an upper punch 5.

[0034] In use, the horizontal plate 3 is supported by the four sets of vertical rods 2, the first hydraulic rod 4 is started to extend, the upper punch 5 is pushed to move downward, the upper punch 5 and the floating cavity 6 are in close contact, then continue to move downward until contacting with the lower punch 8, so as to gradually increase the pressure on the powder and gradually densify the forming, then the first hydraulic rod 4 starts to contract, the upper punch 5 rises and separates from the lower punch 8, then the formed valve guide can be demolded and processed subsequently, the pressure is accurately controlled by the hydraulic drive of the first hydraulic rod 4, so that the pressing process is more stable and controllable.

[0035] In some technical schemes, as shown in Figure 1 The top of the rectangular plate 701 is installed with a pressure sensor 707, and the detection end of the pressure sensor 707 is in contact with the bottom end of the two springs 706.

[0036] In use, the pressure sensor 707 monitors the pressure received by the spring 706, which facilitates the control of the device and improves the practicality in use.

[0037] In some technical schemes, as shown in Figure 1 The top end of the horizontal plate 3 is fixedly installed with a controller 9, the pressure sensor 707 is signal connected with the controller 9, and the controller 9 is electrically connected with the control end of the first hydraulic rod 4.

[0038] In use, the signal is transmitted to the controller 9 by the pressure sensor 707, the controller 9 controls the work of the first hydraulic rod 4 according to the signal, realizes automatic control, reduces the human operation error, and effectively improves the production efficiency and precision.

[0039] In some technical schemes, as shown in Figure 1As shown, the inside of the spring 706 is provided with the damper 10, the bottom end of the damper 10 is installed on the top end of the rectangular plate 701, and the telescopic end of the damper 10 is installed on the bottom end of the lower die punch 8.

[0040] In use, the vibration energy generated during the compression and release of the spring 706 is consumed by the damper 10, further improving the damping effect.

[0041] In some technical solutions, as shown in the drawings, Figure 1 As shown, the top end of the fixed die holder 1 is fixedly installed with a fixed block 11 on one side of the floating core 6, the top end of the fixed block 11 is fixedly installed with a vertical block 12, one side of the vertical block 12 is fixedly installed with an electric push rod 13, the telescopic end of the electric push rod 13 is fixedly installed with a powder box 14, the top of the powder box 14 is fixedly installed with a feeding pipe 15, the bottom of the powder box 14 is provided with a discharging port 16, and the inside of the fixed die holder 1 is installed with a second hydraulic rod 17 below the rectangular plate 701, and the telescopic end of the second hydraulic rod 17 is fixedly installed on the bottom end of the rectangular plate 701.

[0042] In use, the feeding pipe 15 is connected with the external feeding pipe, the electric push rod 13 is started to push the powder box 14, the powder discharging port 16 enters the top of the floating core 6, automatic powder filling is realized, at the same time, when the valve guide is pressed and formed, the second hydraulic rod 17 pushes the lower die punch 8 to rise, the pressed and formed valve guide is pushed out, the electric push rod 13 pushes the powder box 14 to add material, the powder box 14 pushes out the demolded valve guide, and then the automatic powder filling is carried out, which is beneficial to improve the continuity of work.

[0043] In some technical solutions, as shown in the drawings, Figure 1 As shown, the inside of the fixed die holder 1 is provided with two groups of guide grooves 18, and the two sides of the rectangular plate 701 are fixedly installed with guide blocks 19 which are slidingly connected to the adjacent guide grooves 18.

[0044] In use, during the displacement of the rectangular plate 701 by the second hydraulic rod 17, the rectangular plate 701 drives the guide blocks 19 on both sides to slide in the guide grooves 18, and under the action of the guide blocks 19 and the guide grooves 18, the vertical movement of the rectangular plate 701 is facilitated.

[0045] In some technical solutions, as shown in the drawings, Figure 1 As shown, the top end of the lower die punch 8 is fixedly installed with an elastic gasket 20.

[0046] In use, the elastic gasket 20 provides certain buffering and support when the upper die punch 5 and the lower die punch 8 are in contact and pressed, which is beneficial to protect the upper die punch 5 and the lower die punch 8 from direct impact.

[0047] Working principle: fill the powder to the top of the floating cavity 6, contact with the lower punch 8 through the upper punch mechanism, make it gradually densified forming, when the lower punch 8 is subjected to the downward pressure of the upper punch mechanism, with the increase of pressure, the movable arm 705 rotates with the displacement of the lower punch 8, so that the lower punch 8 can move in a small range, at the same time, the spring 706 is compressed when the lower punch 8 moves downward, the spring 706 absorbs and disperses the impact energy after compression, thereby reducing the cracks and deformation caused by vibration during the forming of the valve guide, improving the surface quality of the formed part, supporting the cross plate 3 through four groups of vertical rods 2, starting the extension of the first hydraulic rod 4, pushing the upper punch 5 to move downward, after the upper punch 5 and the floating cavity 6 are in close contact, continue to move downward until contacting with the lower punch 8, so as to gradually increase the pressure on the powder and make it gradually densified forming, then the first hydraulic rod 4 starts to contract, the upper punch 5 rises and separates from the lower punch 8, then the formed valve guide can be demolded and processed, through the hydraulic drive of the first hydraulic rod 4, the pressure is accurately controlled, so that the pressing process is more stable and controllable, through the pressure sensor 707, the pressure received by the spring 706 is monitored, which is convenient for controlling the device and improves the practicality during use, through the pressure sensor 707, the signal is transmitted to the controller 9, the controller 9 controls the work of the first hydraulic rod 4 according to the signal, realizes automatic control, reduces the human operation error, effectively improves the production efficiency and precision, through the damper 10, the vibration energy generated in the compression and release process of the spring 706 is consumed, further improving the damping effect, through the connection of the feeding pipe 15 and the external feeding pipe, starting the electric push rod 13 to push the powder box 14, so that the powder discharge port 16 enters the top of the floating cavity 6, realizing automatic powder filling, at the same time, after the valve guide is pressed and formed, the second hydraulic rod 17 pushes the lower punch 8 to rise, pushing out the valve guide after pressing and forming, the electric push rod 13 pushes the powder box 14 to add material, at the same time, the powder box 14 pushes out the demolded valve guide, then through the automatic powder filling, it is beneficial to improve the continuity of work, through the displacement of the rectangular plate 701 driven by the second hydraulic rod 17, the rectangular plate 701 drives the guide block 19 on both sides to slide in the guide groove 18, at the same time, under the action of the guide block 19 and the guide groove 18, it is beneficial to ensure the vertical movement of the rectangular plate 701.

Claims

1. A powder metallurgy valve guide forming die comprising an upper punch mechanism provided above a fixed die seat (1), characterized in that: The top of the fixed die seat (1) is provided with a floating female die (6), the bottom of the floating female die (6) is inserted with a lower die punch (8), the inside of the fixed die seat (1) is provided with a T-shaped cavity, and the inside of the fixed die seat (1) is provided with a damping mechanism (7) at the T-shaped cavity.

2. The powder metallurgy valve guide forming die of claim 1 wherein, The upper punch mechanism comprises four groups of vertical rods (2), four groups of the vertical rods (2) are respectively arranged at the top four corners of the fixed die seat (1), the top of the four groups of the vertical rods (2) is fixedly provided with a horizontal plate (3), the bottom of the horizontal plate (3) is fixedly provided with a first hydraulic rod (4), and the telescopic end of the first hydraulic rod (4) is fixedly provided with an upper die punch (5).

3. The powder metallurgy valve guide forming die of claim 1 wherein, The top of the rectangular plate (701) is provided with a pressure sensor (707), and the detection end of the pressure sensor (707) is in contact with the bottom end of the two groups of springs (706).

4. The powder metallurgy valve guide forming die of claim 3 wherein, The top of the horizontal plate (3) is fixedly provided with a controller (9), the pressure sensor (707) is signal connected with the controller (9), and the controller (9) is electrically connected with the control end of the first hydraulic rod (4).

5. The powder metallurgy valve guide forming die of claim 1 wherein, The inside of the spring (706) is provided with a damper (10), the bottom end of the damper (10) is arranged on the top of the rectangular plate (701), and the telescopic end of the damper (10) is arranged on the bottom end of the lower die punch (8).

6. The powder metallurgy valve guide forming die of claim 1 wherein, The top of the fixed die seat (1) is provided with a fixed block (11) on one side of the floating female die (6), the top of the fixed block (11) is fixedly provided with a vertical block (12), one side of the vertical block (12) is fixedly provided with an electric push rod (13), the telescopic end of the electric push rod (13) is fixedly provided with a powder box (14), the top of the powder box (14) is fixedly provided with a feeding pipe (15), the bottom of the powder box (14) is provided with a discharging port (16), the inside of the fixed die seat (1) is provided with a second hydraulic rod (17) below the rectangular plate (701), and the telescopic end of the second hydraulic rod (17) is fixedly arranged on the bottom end of the rectangular plate (701).

7. The powder metallurgy valve guide forming die of claim 1 wherein, The inside of the fixed die seat (1) is provided with two groups of guide grooves (18), and the two sides of the rectangular plate (701) are fixedly provided with guide blocks (19).

8. The powder metallurgy valve guide forming die of claim 1 wherein, The top of the lower die punch (8) is fixedly provided with an elastic gasket (20).

Images