Powder metallurgy forming die for preparing automobile transmission chain wheel

Abstract

The invention discloses a powder metallurgy forming die for preparing an automobile transmission chain wheel, relates to the technical field of powder metallurgy, and adopts the technical scheme that the powder metallurgy forming die comprises a die holder, a top plate connected through support rods arranged on two sides of the die holder, and an air cylinder arranged on the top plate, the mould pressing base is connected with the telescopic end of the air cylinder, the bottom mould is matched with the mould pressing base through a molding groove formed in the top face of the mould base to mold metal powder, the bottom mould control assembly is arranged in the mould base and connected with the bottom mould, and the bottom mould control assembly is connected between the bottom mould control assembly and the mould pressing base. According to the forming mold, when parts are prepared, the parts with the same thickness and the parts with different thicknesses can be circularly prepared, a top mold, a bottom mold, adjustment, feeding and discharging are effectively and integrally combined, corresponding operation can be achieved without stopping the mold during part preparation, and the problem that the preparation process is affected due to mold stopping is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy, and more specifically, it relates to a powder metallurgy forming die for preparing an automotive transmission sprocket. Background Art

[0002] An automotive transmission sprocket (also known as a sprocket or chain wheel) is a key component in an automotive transmission system, mainly used for transmitting power and realizing the transmission and conversion of power;

[0003] Since automotive transmission sprockets are metal parts, for the processing of metal parts, the current main preparation processes for such parts on the market mainly include forging, casting, and powder metallurgy. The appropriate preparation method can be selected according to the design requirements, performance requirements, production scale, and cost of the metal parts. Among them, the powder metallurgy process uses metal powder as the raw material, and through processes such as pressing and sintering, the metal powder is transformed into a dense solid material. The pressing process is a key step affecting the quality of the final product. This process determines the density and compactness of the shaped part and also affects the bonding strength between metal powders;

[0004] For the plastic pressing of metal powder, it is usually realized by the cooperation of a die and hydraulic drive. In order to achieve a reciprocating plastic pressing effect, a feeding device / pushing device is also provided on this type of mechanism. Currently, for this type of die, the top die mechanism and the bottom die mechanism belong to independent control structures. After the part is shaped, it needs to be ejected through the ejection mechanism in the bottom die. If the bottom die also involves the function of adjusting the part thickness, since the ejection mechanism and the bottom die adjustment mechanism are both collinear structures corresponding to the position of the bottom die cavity, then the ejection mechanism and the adjustment mechanism need to be combined, which will also involve problems such as the independence of control and transmission, the stability during die pressing, and the matching of structural settings. The combination is difficult and the structure is relatively complex. At the same time, since the feeding device / pushing device, the bottom die adjustment mechanism, and the ejection mechanism, etc. all belong to independent adjustment mechanisms, during the process of adjusting the bottom die according to the part thickness, in order not to cause an impact between devices, the operation of the die needs to be temporarily stopped to adjust the bottom die. Due to the temporary stagnation, it will also have a certain impact on the preparation process of the part.

[0005] Therefore, in order to solve the above technical problems, the present application proposes a powder metallurgy forming die for preparing an automotive transmission sprocket. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a powder metallurgy forming die for preparing an automotive transmission sprocket.

[0007] To achieve the above object, the present invention provides the following technical solution: A powder metallurgy forming die for manufacturing an automotive transmission sprocket, comprising a die base, a top plate connected by support rods arranged on both sides of the die base, and a cylinder arranged on the top plate. It further includes a die pressing seat connected to the telescopic end of the cylinder, a bottom die that cooperates with the die pressing seat through a plastic forming groove opened on the top surface of the die base to plasticize metal powder, a bottom die control component arranged inside the die base and connected to the bottom die, and a die pressing linkage component connected between the bottom die control component and the die pressing seat for position regulation of the bottom die and a top die arranged on the die pressing seat; wherein, a material transfer component for moving the formed part after plasticization and refilling the plastic forming groove is further arranged on the top surface of the die base, and a drive box for adaptively controlling the telescopic movement of the material transfer component by die pressing cooperation with the die pressing seat.

[0008] Preferably, the die pressing seat includes a die pressing area and a transmission area. A fixed seat b and an adjusting member b threadedly connected to a threaded groove b arranged on the fixed seat b are arranged in the die pressing area; a gear c is arranged inside the transmission area, and a motor connected to the gear c through a shaft rod is arranged on the top. The gear c is meshed and connected to the adjusting member b through a transmission opening opened between the die pressing area and the transmission area.

[0009] Preferably, the adjusting member b includes an integrally formed transmission sleeve b and a threaded sleeve b, and a connecting seat b connected to the top die and limitedly rotatable inside the transmission sleeve b and the threaded sleeve b. The connecting seat b and the top die are provided with hole grooves corresponding in position and having a communicating structure; wherein, the transmission sleeve b is meshed with the gear c; a plastic forming column is arranged at the bottom of the threaded groove b and extends into the hole groove of the top die through the hole groove of the connecting seat b.

[0010] Preferably, the bottom die control component includes a fixed seat a provided with a threaded groove a, an adjusting member a with one end connected to the bottom die and the other end threadedly connected to the threaded groove a, and a gear b rotatably connected beside the threaded groove a and meshed with the adjusting member a; wherein, a plastic forming column is arranged inside the threaded groove a and penetrates through the adjusting member a and the bottom die and extends to the plastic forming groove.

[0011] Preferably, the adjusting member a includes an integrally formed transmission sleeve a and a threaded sleeve a, and a connecting seat a connected to the bottom die and limitedly rotatable inside the transmission sleeve a and the threaded sleeve a. The connecting seat a and the bottom die are provided with hole grooves corresponding in position and having a communicating structure.

[0012] Preferably, the die pressing linkage member includes a cylindrical seat fixed to the bottom of the top plate and capable of entering the inside of the die holder through a through hole opened in the die holder, a sleeve rotatably limited inside the cylindrical seat and connected to the center of the bottom of gear c through a shaft rod, and a toothed rod with one end capable of being embedded into the inside of the sleeve through a toothed cavity opened in the sleeve and the other end connected to the center of gear b through a through hole; wherein, both ends of the cylindrical seat are in a communicating structure, and a toothed groove a is longitudinally and linearly opened on the side end of the cylindrical seat.

[0013] Preferably, a transmission connection cavity is opened at a position corresponding to the side wall of the through hole and the toothed groove a, and a gear a capable of meshing with the toothed groove a is arranged at the orifice of the transmission connection cavity.

[0014] Preferably, a transmission groove communicating with the driving box is opened on the die holder at the bottom of the driving box, and a driving member for driving the material moving assembly is arranged in the transmission groove through the transmission of gear a; wherein, the driving member includes a toothed roller rotatably connected to the inner wall of the transmission groove, a bevel gear a arranged at the side end of the toothed roller, a bevel gear b radially meshed with the bevel gear a, a gear d arranged on the bevel gear b, and a gear e connected to gear a through a shaft rod and meshing with gear d; a rod sleeve for moving and limiting the material moving assembly is arranged inside the driving box, and a strip-shaped driving port is opened at a position corresponding to the toothed roller at the bottom of the rod sleeve.

[0015] Preferably, the material moving assembly includes a storage frame, a push plate connected to one end of the storage frame through a plurality of support rods, a push rod arranged at the other end of the storage frame and penetratingly connected to the driving box through the rod sleeve, and a toothed groove b meshing with the toothed roller is linearly opened at the bottom of the push rod; wherein, a shovel plate in an integrated structure is arranged at the bottom of the storage frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the forming die of the present invention, an integrated connection structure of an integrated top die and an adjustable bottom die is adopted. Without affecting die pressing, both the top die and the bottom die can be adjusted in position to a certain extent. In this way, on the one hand, when the die is idle, through adjustment, the top die can be received in the die pressing seat, and the bottom die can seal the plastic cavity, thereby protecting the top die and the plastic cavity. On the other hand, under the action of the die pressing linkage member, the adjustment of the top die and the bottom die is adapted to the entire die pressing process, and the top die and the bottom die can be adaptively adjusted during die pressing.

[0018] 2. In the forming die of the present invention, for the adjusting structures of the top die and the bottom die, an external drive and internal lifting movement form is adopted. The transmission sleeve and the threaded sleeve of the integral structure are driven by the fixed-point meshing transmission of the transmission sleeve to drive the lifting of the threaded sleeve, so that the connecting seat located inside the transmission sleeve and the threaded sleeve moves under the limitation of the shaping column and the shaping groove. This structure, on the one hand, realizes the matching of fixed-point meshing transmission and threaded transmission, and at the same time realizes the synchronization of the movement of the top die and the bottom die. On the other hand, the threaded sleeve is integrally threadedly connected to the fixed seat. During the movement of the adjusting part, the overall stability of the adjusting part and the tightness of the connection are ensured, and it can better withstand the acting force generated during molding. Moreover, this structure can reduce its own volume and simplify the complex structure, and at the same time can enter the shaping cavity together with the bottom die, so that while the bottom die realizes the adjustment of the part thickness, it can also play the role of ejecting the shaped part.

[0019] 3. In the forming die of the present invention, the material transfer component moves adaptively according to the molding position. At the same time, the material transfer component adopts a structure combined with a push plate and a storage frame, which can move the shaped part to the placement area. During this process, after the storage frame passes through the shaping groove, it will be automatically filled. During the reset process, the overflowing metal powder will be leveled by the shovel plate at the bottom of the storage frame and the residual materials at the edge of the shaping groove will be uniformly cleaned, providing a better molding environment.

[0020] 4. In the forming die of the present invention, when preparing parts, parts with the same thickness and parts with different thicknesses can be cyclically prepared. The top die, the bottom die, the adjustment, the feeding, and the discharging are effectively integrated as a whole. When preparing parts, the corresponding operations can be realized without stopping the die, effectively avoiding the problem that the preparation process is affected due to the stop of the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 is the overall structure diagram of the die in the present invention;

[0023] Figure 2 is the partial structure diagram of the whole die in the present invention;

[0024] Figure 3 is the position relationship diagram of the molding seat and the material transfer component during molding in the present invention;

[0025] Figure 4 is the overall top view of the die in the present invention;

[0026] Figure 5 in the present inventionFigure 4 Enlarged view of part A in

[0027] Figure 6 Structural schematic diagram of the die holder in the present invention;

[0028] Figure 7 Connection structure diagram of the die pressing linkage member to the die pressing seat and the bottom die control assembly in the present invention;

[0029] Figure 8 Partial view of the connection of the die pressing linkage member to the die pressing seat and the bottom die control assembly in the present invention;

[0030] Figure 9 Transmission structure diagram of adjusting member a and adjusting member b in the present invention;

[0031] Figure 10 Structural diagram of fixing seat a in the present invention;

[0032] Figure 11 Structural diagram of fixing seat b in the present invention;

[0033] Figure 12 Exploded view of adjusting member a in the present invention;

[0034] Figure 13 Exploded view of adjusting member b in the present invention;

[0035] Figure 14 Exploded view of the die pressing linkage member in the present invention;

[0036] Figure 15 Overall connection diagram of the driving member in the present invention;

[0037] Figure 16 Structural diagram of the material transfer assembly in the present invention.

[0038] 1. Die holder; 101. Shaping groove; 102. Through hole; 103. Gear a; 104. Transmission groove;

[0039] 2. Top plate; 201. Cylinder;

[0040] 3. Die pressing seat; 301. Motor; 302. Transmission port;

[0041] 4. Driving box; 401. Rod sleeve; 402. Driving port;

[0042] 5. Material transfer assembly; 501. Storage frame; 502. Push plate; 503. Shoveling plate; 504. Push rod; 505. Tooth groove b;

[0043] 6. Die pressing linkage member;

[0044] 7. Bottom die;

[0045] 8. Fixed seat a; 801. Gear b; 802. Thread groove a;

[0046] 9. Adjusting part a; 901. Connecting seat a; 902. Transmission sleeve a; 903. Threaded sleeve a;

[0047] 10. Top die;

[0048] 11. Shaping column;

[0049] 12. Adjusting part b; 1201. Connecting seat b; 1202. Transmission sleeve b; 1203. Threaded sleeve b;

[0050] 13. Gear c;

[0051] 14. Fixed seat b; 1401. Thread groove b;

[0052] 15. Cylindrical seat; 1501. Tooth groove a;

[0053] 16. Sleeve; 1601. Tooth-shaped cavity;

[0054] 17. Tooth-shaped rod;

[0055] 18. Driving part; 1801. Tooth roller; 1802. Bevel gear a; 1803. Bevel gear b; 1804. Gear d; 1805. Gear e. Detailed implementation mode

[0056] As Figure 1-16 shown, the present invention provides a powder metallurgy forming die for preparing an automotive transmission sprocket, including a die base 1, a top plate 2 connected by support rods arranged on both sides of the die base 1, and a cylinder 201 arranged on the top plate 2. It is characterized in that it further includes a die pressing seat 3 connected to the telescopic end of the cylinder 201, a bottom die 7 that cooperates with the die pressing seat 3 through a shaping groove 101 opened on the top surface of the die base 1 to shape metal powder, a bottom die control component arranged inside the die base 1 and connected to the bottom die 7, and a die pressing linkage part 6 connected between the bottom die control component and the die pressing seat 3 for position control of the bottom die 7 and the top die 10 arranged on the die pressing seat 3;

[0057] Among them, a material moving component 5 for moving the shaped part after plasticity and refilling the shaping groove 101 is further arranged on the top surface of the die base 1, and a driving box 4 for adaptively telescopic control of the material moving component 5 in die pressing cooperation with the die pressing seat 3;

[0058] Specifically, the entire mold adopts a longitudinal molding form, and a synchronous adjustment structure is adopted for the top mold 10 and the bottom mold 7. The top mold 10 can be adjusted so that when the mold is idle, the top mold 10 can be stored inside the molding seat 3 to provide protection. The bottom mold 7 can be adjusted so that the thickness of the molded part can be specifically set according to needs. At the same time, the bottom mold 7 can achieve the effect of ejecting the molded part while adjusting the thickness of the molded part.

[0059] Based on the above, if Figure 2 and Figure 3 As shown, during the molding process of the metal powder, the material moving component 5 cooperates with the longitudinal displacement of the molding seat 3 and can be adaptively moved, that is, during molding, the material moving component 5 will be in a storage state and move toward the side of the drive box 4. After the molding is separated, the material moving component 5 will be in an expanded state and move toward the side of the molding groove 101. The material is moved by the push plate 502. During the material moving process, the material storage frame 501 will be filled when passing through the molding groove 101. When returning, the metal powder on the surface of the molding groove 101 will be smoothed and the metal powder remaining near the molding groove 101 will be cleaned.

[0060] In order to realize the molding effect, the molding seat 3 can also control the bottom mold control component inside the mold seat 1 through the motor 301 to achieve the effect of plastic thickness adjustment and discharge, such as Figures 7-13 As shown, the molding seat 3 includes a molding area and a transmission area. The molding area is provided with a fixing seat b14 and an adjusting member b12 threadedly connected to a thread groove b1401 provided on the fixing seat b14.

[0061] like Figure 9 、 Figure 10 and Figure 11 As shown, a gear c13 is provided inside the transmission area, and a motor 301 connected to the gear c13 via a shaft is provided on the top. The gear c13 is meshed and connected with the adjustment member b12 through a transmission port 302 opened between the molded area and the transmission area.

[0062] like Figure 13 As shown, the adjusting member b12 comprises an integrated transmission sleeve b1202 and a threaded sleeve b1203, and a connecting seat b1201 connected to the top mold 10 and limitedly rotated within the transmission sleeve b1202 and the threaded sleeve b1203. The connecting seat b1201 and the top mold 10 are provided with corresponding holes and grooves in a communicating structure. The transmission sleeve b1202 is engaged with the gear c13. The bottom of the threaded groove b1401 is provided with a molding column 11 that passes through the hole of the connecting seat b1201 and extends into the hole of the top mold 10.

[0063] Further, the molding area and the transmission area are two partitions in the integrated molding seat 3. The driving of the gear c13 in the transmission area is transmitted by the motor 301 at the top of the molding seat 3. The gear c13 is the driving element of the internal adjusting part b12 in the molding area, and is in a meshing state with the transmission sleeve b1202 of the adjusting part b12 through the transmission port 302;

[0064] Meanwhile, through Figure 7 , Figure 8 , Figure 9 and Figure 10 as shown, the top mold 10 is connected to the connecting seat b1201. Since the shaping column 11 matching the structure of the shaped part is arranged in the fixed seat b14 and is in a penetrating state with the connecting seat b1201 and the top mold 10 in sequence, it can be known that the top mold 10 and the connecting seat b1201 will be limited on the shaping column 11. When the gear c13 drives the connecting seat b1201, a spiral lift will be formed between the threaded sleeve b1203 and the threaded groove b1401 in the fixed seat b14. Since the connecting seat b1201 is in a limited rotation state with the transmission sleeve b1202 and the threaded sleeve b1203, when the transmission sleeve b1202 and the threaded sleeve b1203 move synchronously up and down, the connecting seat b1201 will be driven to move longitudinally, so that the top mold 10 will move together with the connecting seat b1201, thus achieving the effect of adjusting the position of the top mold 10;

[0065] It should be noted that since the connecting seat b1201 and the top mold 10 are integrally connected, for the shaping column 11 at this place, only the connecting seat b1201 needs to be limited, and the transmission sleeve b1202 does not contact the top mold 10. When the top mold 10 enters the shaping groove 101 for molding, the hole groove of the top mold 10 will be fitted with the shaping column 11 on the bottom mold 7. Since the setting of the shaping thickness has a corresponding range limit and the thickness dimensions of parts of the same specification do not vary too much, only an allowable clearance distance needs to be left between the corresponding hole grooves of the top mold 10 and the connecting seat b1201. In view of this situation, the top mold 10 can be thickened, the hole groove of the top mold 10 can be extended, and the shaping column 11 at the top mold 10 can be partially embedded only with the connecting seat b1201 to adapt to the maximum limit expansion and contraction of the top mold 10 without affecting the molding;

[0066] In order to make the gear c13 adapt to the expansion and contraction of the top mold 10, the length of the transmission sleeve b1202 needs to exceed the distance at the maximum expansion and contraction of the top mold 10, so that when the top mold 10 moves to the maximum distance outside the molding seat 3 and is completely received in the molding seat 3, the transmission sleeve b1202 and the gear c13 are in a meshing state. The length of the threaded sleeve b1203 is set according to the length of the transmission sleeve b1202, and only when the top mold 10 expands and contracts maximally, it does not break away from the threaded groove b1401 or is mostly inside the threaded groove b1401.

[0067] To achieve the correspondence and matching of the adjustment between the bottom mold 7 and the top mold 10, as Figures 7-12 shown, the bottom mold control component includes a fixed seat a8 with a threaded groove a802, an adjusting member a9 with one end connected to the bottom mold 7 and the other end threadedly connected to the threaded groove a802, and a gear b801 rotatably connected to the side of the threaded groove a802 and meshingly connected to the adjusting member a9;

[0068] Among them, as Figure 6 、 Figure 8 、 Figure 9 and Figure 12 shown, a shaping column 11 is arranged inside the threaded groove a802, passing through the adjusting member a9 and the bottom mold 7 and extending to the shaping groove 101;

[0069] Meanwhile, as Figure 12 shown, the above-mentioned adjusting member a9 includes a transmission sleeve a902 and a threaded sleeve a903 which are of an integral structure, and a connecting seat a901 connected to the bottom mold 7 and rotatably limited inside the transmission sleeve a902 and the threaded sleeve a903. The connecting seat a901 and the bottom mold 7 are provided with through holes in corresponding positions and in a communicating structure;

[0070] Specifically, the overall structure and adjustment method of the bottom mold control component are basically the same as those of the components in the transmission area and the molding area of the molding seat 3. The position adjustment of the bottom mold 7 is realized through the threaded transmission structure of the adjusting member a9. The differences are as follows:

[0071] ① The connection form and function of the shaping column 11 at the bottom mold 7 and the shaping column 11 at the top mold 10 are different. Specifically, the shaping column 11 of the bottom mold 7 will be in a fixed state and always be in a completely penetrating state with the bottom mold 7 and the connecting seat a901. The shaping column 11 at the bottom mold 7 plays a role in shaping the part and limiting the movement of the bottom mold 7, while the shaping column 11 of the top mold 10 only plays a limiting role;

[0072] ② Through the position adjustment of the adjusting member a9, the bottom mold 7 mainly realizes the limitation of the shaping thickness of the part. At the same time, for the shaped part, the adjusting member a9 can drive the bottom mold 7 to move the part to the surface of the mold base 1 to achieve the effect of ejection, while through the position adjustment of the adjusting member b12, the top mold 10 mainly plays the role of receiving and protecting;

[0073] It should be noted that the size of the bottom mold 7 matches that of the shaping groove 101, while the entire adjusting member a9 is smaller than the shaping groove 101, thereby lifting the adjustment restriction of the adjusting member a9 on the bottom mold 7 and avoiding the phenomenon of jamming with the shaping groove 101 due to the overall excessive size of the adjusting member a9. At the same time, the threaded adjustment of the top mold 10 and the bottom mold 7 adopts the form of co-directional position adjustment. With co-directional position adjustment, on the one hand, the top mold 10 will follow the adjustment of the bottom mold 7 for corresponding adjustment to ensure that there is no large displacement difference in the molding seat 3 during the molding process. On the other hand, after the top mold 10 is received in the molding seat 3, the bottom mold 7 will also seal the shaping opening to prevent metal powder or dust from entering the shaping groove 101, causing difficult cleaning problems. Moreover, through the overflow position of the top mold 10, the depth of the cavity formed by the bottom mold 7 and the shaping groove 101 can be roughly identified.

[0074] In order to achieve synchronous control of the top mold 10 and the bottom mold 7 while not affecting the molding, as Figures 6-14 shown, the molding linkage member 6 includes a cylindrical seat 15 fixed to the bottom of the top plate 2 and capable of entering the inside of the mold base 1 through the through hole 102 opened on the mold base 1, a sleeve 16 limited to rotate inside the cylindrical seat 15 and connected to the bottom center of the gear c13 through a shaft rod, and a toothed rod 17 with one end capable of being embedded into the inside of the sleeve 16 through the toothed cavity 1601 opened on the sleeve 16 and the other end connected to the center of the gear b801 through the through hole 102.

[0075] Specifically, the molding linkage member 6 adopts a retractable meshing transmission method. As Figure 14 shown, the cylindrical seat 15 is a fixed connecting member, the sleeve 16 is a rotational main driving element limited within the cylindrical seat 15, and the toothed rod 17 is a transmission connecting member driven by the sleeve 16. During the molding process of the molding seat 3, the toothed rod 17 can be driven by the sleeve 16 and can adaptively move within the sleeve 16 in cooperation with the expansion and contraction of the molding seat 3 to achieve the independence of expansion and contraction and rotation. That is to say, during the molding process, it can cooperate with the top mold 10 and the bottom mold 7, but the adjustment processes do not affect each other, realizing independent control.

[0076] Among them, as Figure 9 and Figure 14As shown in the figure, both ends of the cylindrical seat 15 are of a communicating structure, and a tooth groove a1501 is longitudinally and linearly formed on the side end of the cylindrical seat 15. A transmission connection cavity is formed at the position corresponding to the tooth groove a1501 on the side wall of the through hole 102. A gear a103 that can mesh with the tooth groove a1501 is arranged at the orifice of the transmission connection cavity. When the tooth grooves a1501 are linearly arranged, a gap needs to be reserved at a part between the cylindrical seat 15 and the molding seat 3. No tooth groove a1501 will be formed in the gap, and the gap part will not participate in the control of the material transfer component 5. That is to say, the end tooth groove a1501 when pre-entering the gap has completed the control of the material transfer component 5, so that the material transfer component 5 has been moved to the corresponding position. After the top mold 10 is molded, before contacting the end tooth groove a1501 of the gap, considering the reciprocating linear movement of the material transfer component 5, while ensuring the position, avoiding the situation of being too close to or touching the molding seat 3. For the limitation of the length of this gap, it is necessary to ensure that after the top mold 10 is completely separated from the molding groove 101, the driving control of the material transfer component 5 is carried out;

[0077] It should be noted that since the molded parts of metal powder are mostly small or common parts, including gears, special-shaped parts, etc., combined with their application scope, the thickness range value of this type of parts can be determined. At the same time, this type of range value belongs to a small range of adjustment or the adjustment interval difference is not large. For the length of the above gap, it can be matched and set with this range. The ultimate purpose of this method is to ensure that the material transfer component 5 does not contact the molding seat 3. At the same time, during the setting, it may be necessary to specifically set the tooth groove a1501 and the gap according to factors such as the distance between the molding seat 3 and the mold base 1 after the molding seat 3 is molded and reset, the distance before and after the material transfer component 5 moves, and the transmission rate of the material transfer component 5. Among them, the transmission rate of the material transfer component 5 also includes the meshing transmission ratio in the driving member 18.

[0078] In order to drive the material transfer component 5, as Figure 6 、 Figure 15 and Figure 16 shown, a transmission groove 104 communicating with the driving box 4 is formed on the mold base 1 at the bottom of the driving box 4, and a driving member 18 that drives the material transfer component 5 through the transmission of the gear a103 is arranged in the transmission groove 104;

[0079] Among them, the driving member 18 includes a tooth roller 1801 rotatably connected to the inner wall of the transmission groove 104, a bevel gear a1802 arranged at the side end of the tooth roller 1801, a bevel gear b1803 meshed with the bevel gear a1802 in the radial direction, a gear d1804 arranged on the bevel gear b1803, and a gear e1805 connected to the gear a103 through a shaft rod and meshed with the gear d1804;

[0080] A rod sleeve 401 for limiting the movement of the material transfer component 5 is arranged inside the driving box 4, and a strip-shaped driving port 402 is formed at the bottom of the rod sleeve 401 corresponding to the tooth roller 1801;

[0081] Further, the driving box 4 mainly functions to limit the movement of the material transfer component 5 through the rod sleeve 401 provided inside the box body when the material transfer component 5 is driven. The rod sleeve 401 is integrally structured with the box body, and the inside of the rod sleeve 401 is hollow and communicates with both ends of the box body. Moreover, as Figure 6 shown, the driving member 18 is arranged in the transmission groove 104 of the die base 1. The gear e1805 of the driving member 18 is connected to the gear a103 through a shaft rod penetrating through the transmission connection cavity opened in the die base 1 to achieve transmission. According to the movement law of the material transfer component 5 during resetting and material transfer after plastic shaping, through the commutation of the gear e1805 cooperating with the gear d1804, and at the same time using the bevel gear b1803 on the gear d1804 to radially drive the bevel gear a1802 on the gear roller 1801, the gear roller 1801 is driven according to the aforementioned movement law.

[0082] In order to achieve the effect of filling while the material transfer component 5 transfers the plastic-shaped part, as Figure 6 and Figure 16 shown, the material transfer component 5 includes a storage frame 501, a push plate 502 connected to one end of the storage frame 501 through multiple groups of support rods, a push rod 504 arranged at the other end of the storage frame 501 and penetratingly connected to the driving box 4 through the rod sleeve 401. A tooth groove b505 meshed with the gear roller 1801 is linearly opened at the bottom of the push rod 504. A shovel plate 503 integrally structured is arranged at the bottom of the storage frame 501;

[0083] Specifically, the material transfer component 5 adopts a combined structure of the push plate 502 and the hollow storage frame 501. The volume of the storage frame 501 needs to at least meet the amount of one-time filling when storing metal powder, and at the same time ensure that during the movement of the storage frame 501 driving the metal powder, there will be no situation where the metal powder overflows from the top of the storage frame 501 due to the accumulation of metal powder. The storage frame 501 can be set in a conical shape or a semi-closed structure at the top. The overall area of the storage frame 501 needs to be larger than the plastic shaping groove 101. At the same time, the maximum single movement distance of the material transfer component 5 is that the entire storage frame 501 crosses over the plastic shaping groove 101. If the accumulated thickness of the metal powder in the storage frame 501 exceeds the plastic shaping thickness, the maximum distance of the material transfer component 5 can also be the position where the center of the storage frame 501 coincides with the center of the plastic shaping groove 101. The storage frame 501 drives the metal powder to move together through the shovel plate 503 arranged at the bottom during the movement of the storage frame 501 on the one hand, and on the other hand, after filling, when the storage frame 501 returns, it can scrape the overflowed metal powder in the plastic shaping groove 101 and clean the residual metal powder near the die pressing area to provide a die pressing environment for the top die 10.

[0084] In summary, the powder metallurgy forming die coordinates the molding pressing and die adjustment, thereby improving the adaptability to metal powder during cyclic shaping, that is, during cyclic preparation, continuous shaping of parts with different thicknesses can be carried out. At the same time, during the reciprocation of the molding pressing, the die adjustment will not be affected, so as to achieve a continuous cyclic preparation effect;

[0085] At the same time, based on the above, during a single molding pressing process, the material transfer component 5 will move reciprocally during the molding pressing and separation, and can move the shaped part. During the movement, the shaping groove 101 can be filled with material at the same time, which can effectively conform to the molding pressing law and achieve the effect of coordinated cooperation. For this die, the cylinder 201 and the motor 301 are controlled by an external control terminal or a control terminal installed on the die base 1. By setting corresponding control parameters through the control terminal, automatic control of the equipment can be achieved. The specific usage process of this die includes the following:

[0086] S1. An automatic feeding mechanism can be set on the top side of the position where the material transfer component 5 is reset. Each time after reset (that is, when the top die 10 and the bottom die 7 are in the molding pressing state), the storage frame 501 is fed once. In the first case, through the movement of the molding pressing seat 3, the driving part 18 drives the material transfer component 5 to move and fill the shaping groove 101. After filling, the molding pressing operation can be carried out. During the molding pressing, the material transfer component 5 will be reset;

[0087] S2. After shaping is completed, the cylinder 201 drives the molding pressing seat 3 to separate until it moves out of the shaping groove 101 or a certain distance out of the shaping groove 101 (the specific position needs to be limited in combination with the length of the gap). After passing through the gap area, it enters the meshing part, and the movement of the material transfer component 5 will intervene. In the foregoing process, first, there is a distance between the top die 10 and the bottom die 7, which can provide a reserved gap for the discharge of the bottom die 7. Second, it can fully ensure that the material transfer component 5 will not touch the molding pressing seat 3;

[0088] S3. Based on S2, when the material transfer component 5 moves and intervenes, the motor 301 will start. The motor 301 will synchronously drive the gear c13 inside the molding pressing seat 3 and the gear b801 on the bottom die control component in the die base 1. The two groups of gears drive the adjusting part b12 and the adjusting part a9 respectively. Due to the same-direction rotation and the cooperation of the screw structure lifting mechanism, the top die 10 will be received in the molding pressing seat 3, and the bottom die 7 will drive the shaped part to move to the shaping groove 101. At this time, as the molding pressing seat 3 continues to move, the push plate 502 of the material transfer component 5 will move the shaped part to the placement area. As the push plate 502 moves, the storage frame 501 will enter the shaping groove 101, and the metal powder in the storage frame 501 will fill the shaping cavity formed by the shaping groove 101 and the bottom die 7. At this time, a single molding pressing shaping is completed;

[0089] S4 is determined according to whether the parts with the same thickness as before are prepared in the second molding. First, if the thickness is the same, the motor 301 will reverse the control of the two sets of adjusting parts in S3, so that the bottom mold 7 is reset to the same position as before. Second, if the thickness is different, the motor 301 will reverse the control of the two sets of adjusting parts in S3, so that the bottom mold 7 moves to the position corresponding to the thickness. At this time, the metal powder in the storage frame 501 will enter the cavity formed by the bottom mold 7 and the shaping groove 1​​01. The molding seat 3 will perform the molding operation again. The material transfer assembly 5 will move back to its original position, and the excess metal powder on the shaping groove 1​​01 will be scraped flat by the scraper plate 503 at the bottom of the storage frame 501. At the same time, the excess metal powder will be removed from the molding area together with the storage frame 501 to achieve the cleaning effect. After the top mold 10 and the bottom mold 7 shape the metal powder, the secondary molding is completed. By repeating the steps of S2-S3, the purpose of cyclic molding can be achieved. After the molding process is completed, the top mold 10 is received into the molding seat 3 by the motor 301, and the port of the top mold 10 can be closed with a cover to protect the top mold 10. The bottom mold 7 is in the ejected position, which also achieves the effect of closing the shaping groove 1​​01, preventing dust particles from entering the shaping groove 1​​01 and making it difficult to clean.

[0090] The above is only the preferred embodiment of the present invention, and it is not intended to limit the present invention in any form. Any person skilled in the art of this industry can smoothly implement the invention according to the instructions in the drawings and the above content. However, any equivalent changes made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above, such as slight changes, modifications, and evolutions, are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A powder metallurgy forming die for manufacturing an automotive transmission sprocket, comprising a die base (1), a top plate (2) connected by support rods arranged on both sides of the die base (1), and a cylinder (201) arranged on the top plate (2), characterized in that, It further includes a molding seat (3) connected to the telescopic end of the cylinder (201), a bottom mold (7) that cooperates with the molding seat (3) through a plastic molding groove (101) opened on the top surface of the mold base (1) to mold metal powder, a bottom mold control assembly disposed inside the mold base (1) and connected to the bottom mold (7), and a molding linkage member (6) connected between the bottom mold control assembly and the molding seat (3) for position control of the bottom mold (7) and the top mold (10) provided on the molding seat (3); Among them, a material transfer assembly (5) for moving the formed part after plastic molding and refilling the plastic molding groove (101) is further provided on the top surface of the mold base (1), and a drive box (4) that is molded and cooperates with the molding seat (3) to adaptively control the telescopic movement of the material transfer assembly (5); The bottom mold control assembly includes a fixed seat a (8) provided with a threaded groove a (802), an adjusting member a (9) with one end connected to the bottom mold (7) and the other end threadedly connected to the threaded groove a (802), and a gear b (801) rotatably connected beside the threaded groove a (802) and meshingly connected to the adjusting member a (9). A plastic molding column (11) penetrating through the adjusting member a (9) and the bottom mold (7) and extending to the plastic molding groove (101) is provided inside the threaded groove a (802).

2. The powder metallurgy forming die for manufacturing an automotive transmission sprocket according to claim 1, wherein: The molding seat (3) includes a molding area and a transmission area. A fixed seat b (14) and an adjusting member b (12) threadedly connected to a threaded groove b (1401) provided on the fixed seat b (14) are provided in the molding area; A gear c (13) is provided inside the transmission area, and a motor (301) connected to the gear c (13) through a shaft rod is provided on the top. The gear c (13) is meshingly connected to the adjusting member b (12) through a transmission port (302) opened between the molding area and the transmission area.

3. A powder metallurgy forming die for manufacturing an automotive transmission sprocket according to claim 2, characterized in that: The adjusting member b (12) includes an integrally formed transmission sleeve b (1202) and a threaded sleeve b (1203), and a connecting seat b (1201) connected to the top mold (10) and limitedly rotatable inside the transmission sleeve b (1202) and the threaded sleeve b (1203). The connecting seat b (1201) and the top mold (10) are provided with through holes that are in position correspondence and have a communicating structure; Among them, the transmission sleeve b (1202) meshes with the gear c (13); A plastic molding column (11) passing through the through hole of the connecting seat b (1201) and extending into the through hole of the top mold (10) is provided at the bottom of the threaded groove b (1401).

4. A powder metallurgy forming die for manufacturing an automotive transmission sprocket according to claim 1, characterized in that: The adjusting member a (9) includes an integrally formed transmission sleeve a (902) and a threaded sleeve a (903), and a connecting seat a (901) connected to the bottom mold (7) and limitedly rotatable inside the transmission sleeve a (902) and the threaded sleeve a (903). The connecting seat a (901) and the bottom mold (7) are provided with through holes that are in position correspondence and have a communicating structure.

5. A powder metallurgy forming die for manufacturing an automotive transmission sprocket according to claim 2, characterized in that: The die pressing linkage member (6) includes a cylindrical seat (15) fixed to the bottom of the top plate (2) and capable of entering the inside of the die base (1) through a through hole (102) opened on the die base (1), a sleeve (16) rotatably limited inside the cylindrical seat (15) and connected to the center of the bottom of the gear c (13) through a shaft rod, and a toothed rod (17) one end of which can be inserted into the inside of the sleeve (16) through a toothed cavity (1601) opened on the sleeve (16) and the other end of which is connected to the center of the gear b (801) through the through hole (102). Wherein, both ends of the cylindrical seat (15) are of a communicating structure, and a toothed groove a (1501) is longitudinally linearly opened on the side end of the cylindrical seat (15).

6. A powder metallurgy forming die for manufacturing an automotive transmission sprocket according to claim 5, characterized in that: A transmission connection cavity is opened at a position corresponding to the side wall of the through hole (102) and the toothed groove a (1501), and a gear a (103) capable of meshing with the toothed groove a (1501) is arranged at the orifice of the transmission connection cavity.

7. A powder metallurgy forming die for manufacturing an automotive transmission sprocket according to claim 6, characterized in that: A transmission groove (104) communicating with the driving box (4) is opened on the die base (1) at the bottom of the driving box (4), and a driving member (18) for driving the material shifting assembly (5) through the transmission of the gear a (103) is arranged in the transmission groove (104). Wherein, the driving member (18) includes a toothed roller (1801) rotatably connected to the inner wall of the transmission groove (104), a bevel gear a (1802) arranged at the side end of the toothed roller (1801), a bevel gear b (1803) radially meshed with the bevel gear a (1802), a gear d (1804) arranged on the bevel gear b (1803), and a gear e (1805) connected to the gear a (103) through a shaft rod and meshing with the gear d (1804). A rod sleeve (401) for moving and limiting the material shifting assembly (5) is arranged inside the driving box (4), and a strip-shaped driving port (402) is opened at the bottom of the rod sleeve (401) corresponding to the toothed roller (1801).

8. A powder metallurgy forming die for manufacturing an automotive transmission sprocket according to claim 7, characterized in that: The material shifting assembly (5) includes a material storage frame (501), a push plate (502) connected to one end of the material storage frame (501) through a plurality of support rods, a push rod (504) arranged at the other end of the material storage frame (501) and penetratingly connected to the driving box (4) through the rod sleeve (401), and a toothed groove b (505) meshing with the toothed roller (1801) is linearly opened at the bottom of the push rod (504). Wherein, a shovel plate (503) of an integral structure is arranged at the bottom of the material storage frame (501).

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