Powder press for gear machining

Abstract

The application discloses a powder press for gear machining and belongs to the field of gear machining, which comprises a rack, a lower die fixed between opposite inner sides of the rack, a gear forming cavity formed in the top surface of the lower die, a fixing base fixed between opposite inner sides of the rack, the fixing base being located above the lower die, a cylinder one fixed on the top surface of the fixing base, a piston rod of the cylinder one penetrating through the bottom surface of the fixing base, an upper die fixed on the bottom end of the piston rod of the cylinder one, the bottom end of the upper die being insertable into the gear forming cavity, a moving bin with an opening downward slidingly arranged on the top surface of the lower die, a feeding pipe fixed on the top surface of the moving bin, a valve fixed on the outer circumferential surface of the feeding pipe, the feeding pipe being in communication with the moving bin, a supporting plate fixed on the side surface of the lower die, a cylinder two fixed on the top surface of the supporting plate, and the end of the piston rod of the cylinder two being fixedly connected with the side surface of the moving bin. The application has the effect of improving the gear machining efficiency.

Description

Technical Field

[0001] This invention relates to the field of gear processing, and in particular to a powder press for gear processing. Background Technology

[0002] Powder metallurgy is an industrial technology that produces metal materials, composite materials, and various types of products by taking metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw materials, and then forming and sintering them. This includes the pressing and forming of parts such as gears.

[0003] Traditional powder metallurgy gear production equipment is usually semi-automatic or manual. Powder is manually added into the molding cavity by workers, and then pressed into shape. Because of the manual powder addition, workers become fatigued after working for a long time, which reduces the efficiency of powder addition and thus reduces the gear processing efficiency. Summary of the Invention

[0004] To address the issue that manual powder application leads to worker fatigue during extended periods, resulting in reduced powder application efficiency and consequently lower gear processing efficiency, this application provides a powder press for gear processing.

[0005] The powder press for gear processing provided in this application adopts the following technical solution: A powder press for gear processing includes a frame, a lower die fixed between opposite inner sides of the frame, a gear forming cavity formed on the top surface of the lower die, a fixed seat fixed between opposite inner sides of the frame, the fixed seat being located above the lower die, a cylinder fixed on the top surface of the fixed seat, the piston rod of the cylinder passing through the bottom surface of the fixed seat, an upper die fixed to the bottom end of the piston rod of the cylinder, the bottom end of the upper die being insertable into the gear forming cavity, a downward-opening movable chamber slidably disposed on the top surface of the lower die, a conveying pipe fixed on the top surface of the movable chamber, a valve fixed on the outer circumference of the conveying pipe, the conveying pipe communicating with the movable chamber, a support plate fixed on the side of the lower die, a cylinder fixed on the top surface of the support plate, and the end of the piston rod of the cylinder fixedly connected to the side of the movable chamber.

[0006] By adopting the above technical solution, powder is conveyed to the moving chamber through the conveying pipe. When the moving chamber is filled with enough powder to fill the gear forming cavity, the valve is closed, and then cylinder two is started. The piston rod of cylinder two pushes the moving chamber to move. When the moving chamber moves to the position of the gear forming cavity, the powder in the moving chamber automatically falls into the gear forming cavity. Then cylinder two is started again, and the piston rod of cylinder two drives the moving chamber to the initial position. The valve is opened, and the conveying pipe conveys powder into the moving chamber. At the same time, cylinder one is started, and the piston rod of cylinder one drives the upper mold to move downward, so that the bottom end of the upper mold is inserted into the gear forming cavity. The upper mold extrudes the powder in the gear forming cavity to form the gear, thereby reducing the need for manual pouring of powder into the gear forming cavity and thus improving gear processing efficiency.

[0007] Preferably, a movable block is provided inside the gear forming cavity, and two movable rods are fixed to the bottom surface of the movable block. The two movable rods pass through the bottom surface of the lower mold and are slidably connected to the lower mold in a vertical direction. A support plate is fixed between the opposite inner surfaces of the frame. A movable plate is provided below the movable rods, and the bottom end of the movable rod is fixed to the top surface of the movable plate. A spring is fixed to the bottom surface of the movable plate, and the bottom end of the spring is fixed to the top surface of the support plate.

[0008] By adopting the above technical solution, after the powder in the gear forming cavity is extruded into a gear, cylinder one is activated. The piston rod of cylinder one drives the upper mold to move upward, so that the upper mold is separated from the gear forming cavity. The moving plate moves upward under the elastic force of the spring, so that the moving plate drives the moving rod to move upward, and the moving rod drives the moving block to move upward, so that the moving block pushes the extruded gear out of the gear forming cavity, making it easier for the workers to take out the extruded gear.

[0009] Preferably, the top surface of the lower mold has a through groove, a fixing rod is fixed to the side of the movable chamber, a pushing rod is fixed to the bottom surface of the fixing rod, the pushing rod passes through the through groove, a driving block is fixed to the side of the pushing rod near the movable rod, a positioning block is fixed to the top surface of the movable plate, and the driving block can drive the positioning block to move downward.

[0010] By adopting the above technical solution, after the worker removes the extruded gear from the gear forming cavity, cylinder two is activated. The piston rod of cylinder two pushes the moving chamber toward the gear forming cavity. When the moving chamber moves, it drives the fixed rod to move, the fixed rod drives the push rod to move, the push rod drives the drive block to move, the drive block drives the positioning block to move downward, causing the positioning block to drive the moving plate to move downward, the moving plate to drive the moving rod to move downward, and the moving rod to drive the moving block to move downward to the bottom of the gear forming cavity. When the moving chamber moves to the top of the gear forming cavity, it facilitates the powder in the moving chamber to fall into the gear forming cavity.

[0011] Preferably, the bottom surface of the driving block has a first inclined surface at the end away from the pushing rod, and the top surface of the positioning block has a second inclined surface at the end near the pushing rod, wherein the first inclined surface can drive the second inclined surface to move.

[0012] By adopting the above technical solution, when the driving block moves toward the positioning block, inclined surface one and inclined surface two abut against each other. The driving block continues to move, causing inclined surface one to push inclined surface two downward, which in turn causes inclined surface two to drive the positioning block downward, thus facilitating the driving block to drive the positioning block downward.

[0013] Preferably, a mounting block is fixed on the top surface of the support plate, a single-acting cylinder is fixed on the top surface of the mounting block, a limit rod is fixed to the end of the piston rod of the single-acting cylinder, the outer peripheral surface of the limit rod can abut against the top surface of the moving plate, and a control component for controlling the opening and closing of the single-acting cylinder is provided on the frame.

[0014] By adopting the above technical solution, when the drive block drives the positioning block to move the moving plate downward to the end position, the control component is activated. The control component controls the single-acting cylinder to start. The piston rod of the single-acting cylinder drives the limit rod to move, so that the limit rod moves to the top surface of the moving plate and the outer peripheral surface of the limit rod abuts against the top surface of the moving plate. This reduces the limitation of the limit rod restricting the upward movement of the moving plate when the second cylinder is activated and the piston rod of the second cylinder moves the moving chamber to the initial position and the drive block disengages from the positioning block. This facilitates the downward movement of the upper mold to extrude and form the powder in the gear forming cavity.

[0015] Preferably, the control component includes a two-position three-way solenoid valve fixed on the inner side of the frame. The two-position three-way solenoid valve is provided with an air inlet P, an air outlet A, and an exhaust port R. The air inlet P is connected to an external compressed air source, the air outlet A is connected to the air inlet of the single-acting cylinder, and the exhaust port R is used to exhaust air outward. The mounting block is provided with a control mechanism for controlling the energization of the solenoid coil of the two-position three-way solenoid valve.

[0016] By adopting the above technical solution, when the drive block drives the positioning block to move downward, causing the positioning block to move the moving plate downward to the end position, the control mechanism is activated. The control mechanism controls the two-position three-way solenoid valve to be energized, so that the air inlet P and the air outlet A are connected, and compressed air enters the single-acting cylinder, thereby causing the piston rod of the single-acting cylinder to extend, causing the piston rod of the single-acting cylinder to drive the limit rod to move, causing the limit rod to move above the moving plate, and causing the limit rod to restrict the moving plate from moving upward.

[0017] Preferably, the control mechanism includes a fixing block fixed to the top surface of the support plate, a fixed contact block fixed to the top surface of the fixing block, a power supply fixed to the top surface of the support plate, a movable contact block slidably disposed on the top surface of the mounting block, the fixed contact block and the movable contact block being disposed opposite to each other, the sides of the fixed contact block and the movable contact block being able to abut against each other, the movable contact block, the two-position three-way solenoid valve, the power supply and the fixed contact block being connected in series, and a push rod fixed to the side of the driving block, the push rod being able to push the movable contact block to move.

[0018] By adopting the above technical solution, when the second cylinder is started, the piston rod of the second cylinder pushes the moving chamber toward the position of the gear forming cavity. The moving chamber also drives the fixed rod to move. The fixed rod drives the push rod to move. The push rod drives the drive block to move. The drive block drives the push rod to move, so that the push rod pushes the moving contact block toward the direction close to the fixed contact block. When the positioning block drives the moving plate to move downward to the end point, the moving contact block and the side opposite to the fixed contact block are in contact, thereby energizing the electromagnetic coil of the two-position three-way solenoid valve.

[0019] Preferably, an unlocking rod is fixed to the outer peripheral surface of the piston rod of the cylinder, and an opening is provided on the top surface of the lower mold. The bottom end of the unlocking rod can pass through the opening. The bottom end of the unlocking rod is a pointed tip. The top edges of the opposite sides of the moving contact block and the fixed contact block are chamfered. The bottom end of the unlocking rod can pass through the chamfer and be inserted between the moving contact block and the fixed contact block.

[0020] By adopting the above technical solution, when cylinder one is started, the piston rod of cylinder one drives the upper mold to move downward, so that the bottom end of the upper mold is inserted into the gear forming cavity, and the powder in the gear forming cavity is squeezed into a gear. At the same time, the piston rod of cylinder one also drives the unlocking rod to move downward, so that the bottom end of the unlocking rod is inserted between the moving contact block and the fixed contact block, so that the moving contact block and the fixed contact block are separated, thereby de-energizing the electromagnetic coil of the two-position three-way solenoid valve, making the outlet A and the exhaust port R connected, the gas inside the single-acting cylinder is discharged, and the piston rod of the single-acting cylinder retracts by relying on the internal spring, so that the piston rod of the single-acting cylinder drives the limit rod to move, so that the limit rod is disengaged from the moving plate, which facilitates the piston rod of cylinder one to drive the upper mold to move upward. When the upper mold is disengaged from the lower mold, the moving block moves upward under the action of the spring force, so that the moving block pushes the gear squeezed and formed in the gear forming cavity out of the gear forming cavity.

[0021] Preferably, a positioning ring is fixed to the outer peripheral surface of the moving rod, and the top surface of the positioning ring can abut against the bottom surface of the lower mold.

[0022] By adopting the above technical solution, when the moving plate moves upward under the elastic force of the spring, the moving rod moves upward, and the moving block moves upward, so that the moving block pushes the formed gear upward. When the top surface of the moving block is coplanar with the top surface of the lower mold, the top surface of the positioning ring abuts against the bottom surface of the lower mold, which facilitates the activation of cylinder two. When the piston rod of cylinder two pushes the moving chamber to the top of the gear forming cavity, the moving chamber pushes the extruded gear to one side of the gear forming cavity.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. Powder is conveyed to the moving chamber through the conveying pipe. When the moving chamber is filled with enough powder to fill the gear forming cavity, the valve is closed, and then cylinder two is started. The piston rod of cylinder two pushes the moving chamber to move. When the moving chamber moves to the position of the gear forming cavity, the powder in the moving chamber automatically falls into the gear forming cavity. Then cylinder two is started again. The piston rod of cylinder two drives the moving chamber to the initial position, and the valve is opened so that the conveying pipe conveys powder into the moving chamber. At the same time, cylinder one is started. The piston rod of cylinder one drives the upper mold to move downward so that the bottom end of the upper mold is inserted into the gear forming cavity. The upper mold extrudes the powder in the gear forming cavity to form the gear, thereby reducing the need for manual pouring of powder into the gear forming cavity and thus improving gear processing efficiency. 2. After the powder in the gear forming cavity is extruded into a gear, cylinder one is activated. The piston rod of cylinder one drives the upper mold to move upward. After the upper mold is separated from the gear forming cavity, the moving plate moves upward under the elastic force of the spring. The moving plate drives the moving rod to move upward, and the moving rod drives the moving block to move upward. This causes the moving block to push the extruded gear out of the gear forming cavity, making it easier for the workers to take out the extruded gear. 3. After the worker removes the extruded gear from the gear forming cavity, cylinder two is activated. The piston rod of cylinder two pushes the moving chamber toward the gear forming cavity. As the moving chamber moves, it moves the fixed rod, which in turn moves the push rod. The push rod moves the drive block, which in turn moves the positioning block. This causes the positioning block to move the moving plate downwards, which in turn moves the moving rod downwards. The moving plate then moves the moving block downwards, which in turn moves the moving block downwards to the bottom of the gear forming cavity. When the moving chamber moves above the gear forming cavity, it facilitates the powder inside the moving chamber falling into the gear forming cavity. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the powder press for gear processing according to an embodiment of this application.

[0025] Figure 2 This is a cross-sectional view of the mobile compartment in an embodiment of this application.

[0026] Figure 3This is a cross-sectional view of the lower mold in an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the support plate in an embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the structure of a two-position three-way solenoid valve in an embodiment of this application.

[0029] Figure 6 This is a schematic diagram of the structure of the fixing block in an embodiment of this application.

[0030] Reference numerals: 1. Frame; 11. Lower mold; 12. Gear forming cavity; 13. Fixed seat; 14. Cylinder 1; 15. Upper mold; 2. Moving chamber; 21. Cylinder 2; 22. Material conveying pipe; 23. Valve; 3. Moving block; 31. Moving rod; 32. Moving plate; 33. Support plate; 34. Spring; 35. Positioning ring; 4. Through groove; 41. Fixed rod; 42. Push rod; 43. Drive block; 44. Positioning block; 45. Inclined surface 1; 46. Inclined surface 2; 5. Mounting block; 51. Single-acting cylinder; 52. Limiting rod; 53. Two-position three-way solenoid valve; 54. Air inlet P; 55. Air outlet A; 56. Exhaust port R; 6. Moving contact block; 61. Fixed contact block; 62. Power supply; 63. Chamfer; 64. Push rod; 65. Fixed block; 66. Unlocking rod; 67. Through port. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0032] This application discloses a powder press for gear processing.

[0033] Reference Figure 1 and Figure 2 A powder press for gear processing includes a frame 1. A lower mold 11 is fixed between the relatively inner sides of the frame 1, and a gear forming cavity 12 is formed on the top surface of the lower mold 11. A fixed seat 13 is fixed between the relatively inner sides of the frame 1, located above the lower mold 11. A cylinder 14 is fixed on the top surface of the fixed seat 13, and the piston rod of the cylinder 14 passes through the bottom surface of the fixed seat 13. An upper mold 15 is fixed to the bottom end of the piston rod of the cylinder 14, and the bottom end of the upper mold 15 can be inserted into the gear forming cavity 12. A downward-opening movable chamber 2 is slidably provided on the top surface of the lower mold 11. The movable chamber 2 can be moved to above the gear forming cavity 12. A conveying pipe 22 is fixed on the top surface of the movable chamber 2 and is connected to the movable chamber 2. A valve 23 is fixed on the outer circumferential surface of the conveying pipe 22. A support plate 33 is fixed on the side of the lower mold 11, and the top surface of the support plate 33 is coplanar with the top surface of the lower mold 11. A second cylinder 21 is fixed to the top surface of the support plate 33, and the end of the piston rod of the second cylinder 21 is fixedly connected to the side of the movable chamber 2. Reference Figure 1 and Figure 3 A movable block 3 is provided inside the gear forming cavity 12, and the movable block 3 can move vertically within the gear forming cavity 12. Two movable rods 31 are fixed to the bottom surface of the movable block 3, and the two movable rods 31 are symmetrically arranged along the central axis of the movable block 3. The bottom ends of the two movable rods 31 pass through the bottom surface of the lower mold 11, and the movable rods 31 are slidably connected to the lower mold 11 vertically. A support plate 33 is fixed between the opposite inner surfaces of the frame 1, and a movable plate 32 is provided below the movable rods 31, with the bottom end of the movable rod 31 fixed to the top surface of the movable plate 32. Springs 34 are fixed on both sides of the bottom surface of the movable plate 32, and the bottom ends of the springs 34 are fixed to the top surface of the support plate 33. A positioning ring 35 is fixed to the outer circumferential surface of the movable rod 31, and the top surface of the positioning ring 35 abuts against the bottom surface of the lower mold 11.

[0034] Reference Figure 3 and Figure 4 Both sides of the top surface of the lower mold 11 are provided with through slots 4, which extend vertically through the lower mold 11. Fixed rods 41 are fixed to both sides of the movable chamber 2. A push rod 42 is fixed to the bottom surface of the fixed rod 41, passing through the through slots 4. A drive block 43 is fixed to the bottom end of the push rod 42 near the side of the movable plate 32. Positioning blocks 44 are fixed to both sides of the top surface of the movable plate 32. An inclined surface 45 is provided at the bottom end of the drive block 43 away from the push rod 42, and an inclined surface 46 is provided at the top end of the positioning block 44 near the push rod 42. The inclined surface 45 can drive the inclined surface 46 to move.

[0035] Reference Figure 1 , Figure 3 and Figure 5 A mounting block 5 is fixed on the top surface of the support plate 33, and a single-acting cylinder 51 is fixed on the top surface of the mounting block 5. A limit rod 52 is fixed at the end of the piston rod of the single-acting cylinder 51, and the outer peripheral surface of the limit rod 52 can abut against the top surface of the moving plate 32.

[0036] Reference Figure 1 , Figure 4 and Figure 5 A two-position three-way solenoid valve 53 is fixed on the inner side of the frame 1. One side of the two-position three-way solenoid valve 53 is provided with an air inlet P54 and an exhaust port R56, and the other side of the two-position three-way solenoid valve 53 is provided with an air outlet A55. The air inlet P54 is connected to an external compressed air source, the air outlet A55 is connected to the air inlet of the single-acting cylinder 51, and the exhaust port R56 is used to exhaust air outward.

[0037] Reference Figure 4 , Figure 5 and Figure 6A fixing block 65 is fixed to the top surface of the support plate 33. A fixed contact block 61 and a power supply 62 are fixed to the top surface of the fixing block 65. A movable contact block 6 is slidably arranged on the top surface of the fixing block 65. The fixed contact block 61 and the movable contact block 6 are arranged opposite to each other. The top edges of the opposite sides of the movable contact block 6 and the fixed contact block 61 are both chamfered 63, and the opposite sides of the fixed contact block 61 and the movable contact block 6 can abut against each other. The power supply 62 is fixed to the top surface of the support plate 33. The movable contact block 6, the two-position three-way solenoid valve 53, the power supply 62 and the fixed contact block 61 are connected in series. A push rod 64 is fixed to the side of one of the drive blocks 43. The push rod 64 can push the movable contact block 6 to move. An unlocking rod 66 is fixed on the outer circumferential surface of the piston rod of cylinder 14. A through-hole 67 is opened on the top surface of the lower mold 11. The bottom end of the unlocking rod 66 can pass through the through-hole 67. The bottom end of the unlocking rod 66 is a pointed tip. The bottom end of the unlocking rod 66 can pass through the chamfer 63 and be inserted between the moving contact block 6 and the fixed contact block 61.

[0038] The implementation principle of a powder press for gear processing according to an embodiment of this application is as follows: In the initial state, the top surface of the moving block 3 is coplanar with the top surface of the lower die 11. Powder is conveyed to the moving chamber 2 through the conveying pipe 22. When the moving chamber 2 is filled with enough powder to fill the gear forming cavity 12, the valve 23 is closed. Then, cylinder 21 is activated. The piston rod of cylinder 21 pushes the moving chamber 2 to move, so that the moving chamber 2 moves above the gear forming cavity 12. At the same time, as the moving chamber 2 moves, it also drives the fixed rod 41 to move. The fixed rod 41 drives the push rod 42 to move. The push rod 42 drives the drive block 43 to move, so that the drive block 43 drives the positioning block 44 to move downward. The positioning block 44 drives the moving plate 32 to move downward. The moving plate 32 drives the moving rod 31 to move downward, so that the moving rod 31 drives the moving block 3 to move downward. The moving block 3 moves to the bottom of the gear forming cavity 12. The spring 34 is in a compressed state, and the powder in the moving chamber 2 automatically falls into the gear forming cavity 12, thereby reducing the need for manual pouring of powder into the gear forming cavity 12 and improving gear processing efficiency.

[0039] When the piston rod of cylinder 21 pushes the moving chamber 2 toward the gear forming cavity 12, the moving chamber 2 also drives the fixed rod 41 to move. The fixed rod 41 drives the push rod 42 to move. The push rod 42 drives the drive block 43 to move, causing the drive block 43 to drive the push rod 64 to move. The push rod 64 pushes the moving contact block 6 toward the fixed contact block 61, so that the moving contact block 6 and the side opposite to the fixed contact block 61 are in contact. This energizes the electromagnetic coil of the two-position three-way solenoid valve 53, making the air inlet P54 and the air outlet A55 connected. Compressed air enters the single-acting cylinder 51, causing the piston rod of the single-acting cylinder 51 to extend. The piston rod of the single-acting cylinder 51 drives the limit rod 52 to move, so that the limit rod 52 moves above the moving plate 32. When cylinder 21 is activated, the piston rod of cylinder 21 drives the moving chamber 2 to the initial position. When the driving block 43 disengages from the positioning block 44, the limiting rod 52 restricts the moving plate 32 from moving upward, thereby reducing the upward movement of the moving block 3 and pushing out the powder in the gear forming cavity 12.

[0040] Next, cylinder 14 is activated, causing its piston rod to move the upper mold 15 downwards, inserting its bottom end into the gear forming cavity 12 and compressing the powder in the cavity into gears. As the piston rod of cylinder 14 moves downwards, it also moves the unlocking rod 66 downwards, causing its bottom end to pass through the through-hole 67 and insert between the moving contact 6 and the fixed contact 61, separating them. This de-energizes the solenoid coil of the two-position three-way solenoid valve 53, connecting the outlet A55 to the exhaust port R56, allowing the gas inside the single-acting cylinder 51 to escape. The piston rod of the single-acting cylinder 51 retracts due to its internal spring, causing it to move the limiting rod 52, disengaging it from the moving plate 32. When cylinder 14 is activated, the piston rod of cylinder 14 drives the upper mold 15 to move upward, causing the upper mold 15 to disengage from the lower mold 11. This causes the moving block 3 to move upward under the elastic force of the spring 34, thereby pushing the gear extruded and formed in the gear forming cavity 12 out of the gear forming cavity 12.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A powder press for gear processing, characterized in that: The system includes a frame (1), a lower mold (11) fixed between the opposite inner sides of the frame (1), a gear forming cavity (12) formed on the top surface of the lower mold (11), a fixing seat (13) fixed between the opposite inner sides of the frame (1), the fixing seat (13) being located above the lower mold (11), a cylinder (14) fixed on the top surface of the fixing seat (13), the piston rod of the cylinder (14) passing through the bottom surface of the fixing seat (13), and an upper mold (15) fixed to the bottom end of the piston rod of the cylinder (14). The bottom end can be inserted into the gear forming cavity (12). The top surface of the lower mold (11) is slidably provided with a downward-facing movable chamber (2). The top surface of the movable chamber (2) is fixed with a material conveying pipe (22). The outer circumferential surface of the material conveying pipe (22) is fixed with a valve (23). The material conveying pipe (22) is connected to the movable chamber (2). The side of the lower mold (11) is fixed with a support plate (33). The top surface of the support plate (33) is fixed with a cylinder two (21). The end of the piston rod of the cylinder two (21) is fixedly connected to the side of the movable chamber (2).

2. The powder press for gear processing according to claim 1, characterized in that: A movable block (3) is provided inside the gear forming cavity (12). Two movable rods (31) are fixed on the bottom surface of the movable block (3). The two movable rods (31) pass through the bottom surface of the lower mold (11). The movable rods (31) are slidably connected to the lower mold (11) in the vertical direction. A support plate (33) is fixed between the opposite inner surfaces of the frame (1). A movable plate (32) is provided below the movable rods (31). The bottom end of the movable rods (31) is fixed to the top surface of the movable plate (32). A spring (34) is fixed on the bottom surface of the movable plate (32). The bottom end of the spring (34) is fixed to the top surface of the support plate (33).

3. A powder press for gear processing according to claim 2, characterized in that: The lower mold (11) has a through groove (4) on its top surface. A fixing rod (41) is fixed to the side of the movable chamber (2). A push rod (42) is fixed to the bottom surface of the fixing rod (41). The push rod (42) passes through the through groove (4). A drive block (43) is fixed to the side of the push rod (42) near the movable rod (31). A positioning block (44) is fixed to the top surface of the movable plate (32). The drive block (43) can drive the positioning block (44) to move downward.

4. A powder press for gear processing according to claim 3, characterized in that: The bottom surface of the drive block (43) is provided with an inclined surface one (45) at the end away from the push rod (42), and the top surface of the positioning block (44) is provided with an inclined surface two (46) at the end near the push rod (42). The inclined surface one (45) can drive the inclined surface two (46) to move.

5. A powder press for gear processing according to claim 4, characterized in that: The top surface of the support plate (33) is fixed with a mounting block (5), the top surface of the mounting block (5) is fixed with a single-acting cylinder (51), the end of the piston rod of the single-acting cylinder (51) is fixed with a limit rod (52), the outer peripheral surface of the limit rod (52) can abut against the top surface of the moving plate (32), and the frame (1) is provided with a control component for controlling the opening and closing of the single-acting cylinder (51).

6. A powder press for gear processing according to claim 1, characterized in that: The control component includes a two-position three-way solenoid valve (53) fixed on the inner side of the frame (1). The two-position three-way solenoid valve (53) is provided with an air inlet P (54), an air outlet A (55) and an exhaust port R (56). The air inlet P (54) is connected to an external compressed air source. The air outlet A (55) is connected to the air inlet of the single-acting cylinder (51). The exhaust port R (56) is used to exhaust air outward. The mounting block (5) is provided with a control mechanism for controlling the energization of the electromagnetic coil of the two-position three-way solenoid valve (53).

7. A powder press for gear processing according to claim 6, characterized in that: The control mechanism includes a fixing block (65) fixed to the top surface of the support plate (33), a fixed contact block (61) fixed to the top surface of the fixing block (65), a power supply (62) fixed to the top surface of the support plate (33), a movable contact block (6) slidably disposed on the top surface of the mounting block (5), the fixed contact block (61) and the movable contact block (6) being disposed opposite to each other, the sides of the fixed contact block (61) and the movable contact block (6) being able to abut against each other, the movable contact block (6), the two-position three-way solenoid valve (53), the power supply (62) and the fixed contact block (61) being connected in series, and a push rod (64) fixed to the side of the drive block (43), the push rod (64) being able to push the movable contact block (6) to move.

8. A powder press for gear processing according to claim 7, characterized in that: An unlocking rod (66) is fixed on the outer circumferential surface of the piston rod of cylinder 1 (14). A through-hole (67) is opened on the top surface of the lower mold (11). The bottom end of the unlocking rod (66) can pass through the through-hole (67). The bottom end of the unlocking rod (66) is a pointed tip. The top edges of the opposite sides of the moving contact block (6) and the fixed contact block (61) are both chamfered (63). The bottom end of the unlocking rod (66) can pass through the chamfer (63) and be inserted between the moving contact block (6) and the fixed contact block (61).

9. A powder press for gear processing according to claim 8, characterized in that: A positioning ring (35) is fixed on the outer peripheral surface of the moving rod (31), and the top surface of the positioning ring (35) can abut against the bottom surface of the lower mold (11).

Images