Powder metallurgy forming die for automobile transmission sprocket

Abstract

The application discloses a powder metallurgy forming die for automobile transmission chain wheels, and relates to the technical field of powder metallurgy.The technical scheme is as follows: the forming die comprises a die base, a top plate connected through supporting rods arranged on the two sides of the die base, and a pneumatic cylinder arranged on the top plate; the forming die further comprises a die pressing base connected with the telescopic end of the pneumatic cylinder, a bottom die for plastic forming of metal powder, a bottom die control assembly arranged in the die base and connected with the bottom die, and a connecting rod connected between the bottom die control assembly and the die pressing base.In the application, the forming die can cyclically prepare parts with the same thickness and parts with different thicknesses, effectively integrates the top die, the bottom die, adjustment, feeding and discharging, and can realize corresponding operations without stopping the die during part preparation, thereby effectively avoiding the problem that the preparation process is affected due to the stopping of the die.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder metallurgy, more particularly, it relates to a powder metallurgy forming die for preparing an automobile transmission sprocket. BACKGROUND

[0002] The automobile transmission sprocket (or sprocket, chain wheel) is a key component in the automobile transmission system, mainly used for transmitting power and realizing power transmission and conversion.

[0003] Since the automobile transmission sprocket is a metal part, the preparation process of this type of part on the market mainly includes 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 part. Among them, the powder metallurgy process uses metal powder as raw material, and through processes such as pressing and sintering, the metal powder is converted into a dense solid material. The pressing process is the key step that affects the quality of the final product. This process determines the density and compactness of the molded part and also affects the strength of the metal powder bonding.

[0004] For the plastic pressing of metal powder, a mold and a hydraulic drive are usually used to achieve the effect of reciprocating plastic pressing. In order to achieve the effect of reciprocating plastic pressing, a feeding device / pushing device is also provided on this type of mechanism. At present, the top die mechanism and the bottom die mechanism of this type of mold are independent control structures. After the part is molded, it needs to be ejected by the ejecting mechanism in the bottom die. If the bottom die also involves part thickness adjustment function, since the ejecting mechanism and the bottom die adjustment mechanism are collinear structures corresponding to the position of the bottom die cavity, the ejecting mechanism and the adjustment mechanism need to be combined, and at the same time, the independence of control and transmission, the stability during molding and the matching of structural arrangement will be involved. The combination is difficult and the structure is complex. At the same time, since the feeding device / pushing device, the bottom die adjustment mechanism and the ejecting mechanism are independent adjustment mechanisms, in order to avoid affecting the equipment during the adjustment of the bottom die according to the thickness of the part, the mold needs to be temporarily stopped. The temporary stop will also affect the preparation process of the part.

[0005] Therefore, in order to solve the above technical problems, the present application provides a powder metallurgy forming die for preparing an automobile transmission sprocket. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide a powder metallurgy forming die for preparing an automobile transmission sprocket.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a powder metallurgy forming die for preparing automobile transmission sprocket, comprising a die seat, a top plate connected by support rods arranged on both sides of the die seat, and a pneumatic cylinder arranged on the top plate, further comprising a die pressing seat connected with the telescopic end of the pneumatic cylinder, a bottom die for plastic forming of metal powder matched with the die pressing seat through a plastic groove opened on the top surface of the die seat, a bottom die control assembly arranged in the die seat and connected with the bottom die, and a die pressing linkage connected between the bottom die control assembly and the die pressing seat for position control of the top die arranged on the bottom die and the die pressing seat; wherein the top surface of the die seat is further provided with a material moving assembly for position moving of the formed piece after plastic forming and re-filling of the plastic groove, and a drive box for adaptive telescopic control of the material moving assembly matched with the die pressing seat.

[0008] Preferably, the die pressing seat comprises a die pressing area and a transmission area, the die pressing area is provided with a fixing seat b and an adjusting part b threadedly connected with a threaded groove b arranged on the fixing seat b; the transmission area is internally provided with a gear c, and the top is provided with a motor connected with the gear c through a shaft; the gear c is engagedly connected with the adjusting part b through a transmission opening opened between the die pressing area and the transmission area.

[0009] Preferably, the adjusting part b comprises a transmission sleeve b and a threaded sleeve b in an integrated structure, a connecting seat b connected with the top die and limited to rotate in the transmission sleeve b and the threaded sleeve b, and a hole groove with corresponding positions and a communication structure opened on the connecting seat b and the top die; wherein the transmission sleeve b is engaged with the gear c; the threaded groove b is provided with a plastic column extending into the hole groove of the top die through the hole groove of the connecting seat b.

[0010] Preferably, the bottom die control assembly comprises a fixing seat a provided with a threaded groove a, an adjusting part a connected with the bottom die at one end and threadedly connected in the threaded groove a, and a gear b rotatably connected beside the threaded groove a and engagedly connected with the adjusting part a; wherein the threaded groove a is internally provided with a plastic column extending to the plastic groove through the adjusting part a and the bottom die.

[0011] Preferably, the adjusting part a comprises a transmission sleeve a and a threaded sleeve a in an integrated structure, a connecting seat a connected with the bottom die and limited to rotate in the transmission sleeve a and the threaded sleeve a, and a hole groove with corresponding positions and a communication structure opened on the connecting seat a and the bottom die.

[0012] Preferably, the mold pressing linkage comprises a bottom fixed to the driving area of the mold pressing base, a cylindrical seat capable of entering the inside of the mold base through the through hole formed on the mold base, a sleeve capable of rotating in the inside of the cylindrical seat and connected to the bottom center of gear c through a shaft, and a toothed rod connected to the center of gear b through a through hole at one end and capable of being embedded into the inside of the sleeve through the toothed cavity formed on the sleeve, and the other end is connected to the center of gear b through a through hole.

[0013] Preferably, the through hole side wall is provided with a transmission connection cavity corresponding to the position of the tooth groove a, and the cavity opening of the transmission connection cavity is provided with a gear a capable of engaging with the tooth groove a.

[0014] Preferably, the mold base at the bottom of the driving box is provided with a transmission groove in communication with the driving box, and the transmission groove is provided with a driving piece capable of driving the material moving assembly through the gear a; wherein the driving piece comprises a toothed roller in rotational connection with the inner wall of the transmission groove, a bevel gear a provided on the side end of the toothed roller, a bevel gear b in radial engagement connection with the bevel gear a, a gear d provided on the bevel gear b, and a gear e connected to the gear a through a shaft and engaged with the gear d; the inside of the driving box is provided with a rod sleeve for limiting the movement of the material moving assembly, and the bottom of the rod sleeve is provided with a strip-shaped driving opening corresponding to the toothed roller.

[0015] Preferably, the material moving assembly comprises a storage frame, a push plate connected to one end of the storage frame through a plurality of supporting rods, a push rod provided at the other end of the storage frame and in through connection with the driving box through the rod sleeve, and a tooth groove b provided at the bottom of the push rod and in engagement connection with the toothed roller; wherein the bottom of the storage frame is provided with a shovel plate in an integral structure.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1、The integrated connecting structure of the forming mold in the present application adopts an integrated connecting structure of the integrated top die and the adjustable bottom die, which can be adjusted without affecting the mold pressing, so that the top die and the bottom die can be adjusted to a certain extent. On the one hand, when the mold is idle, the top die can be stored in the mold pressing base, 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 mold pressing linkage, the adjustment of the top die and the bottom die is suitable for the whole process of mold pressing, and the top die and the bottom die can be adaptively adjusted during mold pressing.

[0018] 2、The forming die in the present application, for the top die and the bottom die adjusting structure, adopts the moving form of outer transmission and inner lifting, the integral structure transmission sleeve and the threaded sleeve, through the fixed point meshing transmission of the transmission sleeve, drives the lifting of the threaded sleeve, so that the connecting seat located in the transmission sleeve and the threaded sleeve is moved in position under the limiting of the plastic column and the plastic groove, this structure, on the one hand, realizes the matching of the fixed point meshing transmission and the threaded transmission, and at the same time realizes the synchronism of the top die and the bottom die movement, on the other hand, the threaded sleeve is integrally screwed in the fixed seat, during the movement of the adjusting part, the stability of the adjusting part as a whole and the tightness of the connection are ensured, the acting force generated during the mold pressing can be better borne, furthermore, this structure can reduce the volume and simplify the complex structure, and at the same time, the bottom die can be put into the plastic cavity, so that the bottom die can realize the thickness adjustment of the part and also can realize the ejection effect of the plastic part.

[0019] 3. In the forming die in the present application, the material moving assembly is adaptively moved according to the position of mold pressing, and at the same time, the material moving assembly adopts the structure of push plate and storage frame combination, which can move the plastic parts to the placement area, during this process, the storage frame will automatically fill after passing through the plastic groove, and during the resetting process, the spilled metal powder will be flattened by the shovel plate at the bottom of the storage frame, and the residual material at the edge of the plastic groove will be uniformly cleaned, providing a better mold pressing environment.

[0020] 4. In the forming die in the present application, the same thickness parts and different thickness parts can be prepared in a cycle, effectively combining the top die, the bottom die and the adjusting, feeding and discharging, so that the corresponding operation can be realized without stopping the mold during part preparation, effectively avoiding the problem of affecting the preparation process due to the stop of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is the overall structure diagram of the mold in the present application;

[0023] Figure 2 It is the partial structure diagram of the mold in the present application;

[0024] Figure 3 It is the position relationship diagram of the mold pressing seat and the material moving assembly during mold pressing in the present application;

[0025] Figure 4 It is the overall plan view of the mold in the present application;

[0026] Figure 5 It is the overall plan view of the mold in the present application;Figure 4 Enlarged view of A in FIG. 1;

[0027] Figure 6 Structure diagram of the mold base in the present application;

[0028] Figure 7 Connection structure diagram of the mold pressing linkage and the mold pressing base and the bottom mold control assembly in the present application;

[0029] Figure 8 Local diagram of the connection of the mold pressing linkage and the mold pressing base and the bottom mold control assembly in the present application;

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

[0031] Figure 10 Structure diagram of the fixed seat a in the present application;

[0032] Figure 11 Structure diagram of the fixed seat b in the present application;

[0033] Figure 12 Split diagram of the adjusting member a in the present application;

[0034] Figure 13 Split diagram of the adjusting member b in the present application;

[0035] Figure 14 Split diagram of the mold pressing linkage in the present application;

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

[0037] Figure 16 Structure diagram of the material moving assembly in the present application.

[0038] 1, mold base; 101, plastic molding groove; 102, through hole; 103, gear a; 104, transmission groove;

[0039] 2, top plate; 201, air cylinder;

[0040] 3, mold pressing base; 301, motor; 302, transmission port;

[0041] 4, driving box; 401, rod sleeve; 402, driving port;

[0042] 5, material moving assembly; 501, material storage frame; 502, push plate; 503, shovel plate; 504, push rod; 505, tooth groove b;

[0043] 6, mold pressing linkage;

[0044] 7, bottom mold;

[0045] 8, fixed seat a; 801, gear b; 802, threaded 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, plastic 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, threaded groove b;

[0052] 15, cylindrical seat; 1501, tooth groove a;

[0053] 16, sleeve; 1601, tooth cavity;

[0054] 17, toothed rod;

[0055] 18, driving part; 1801, toothed roller; 1802, bevel gear a; 1803, bevel gear b; 1804, gear d; 1805, gear e. DETAILED DESCRIPTION

[0056] As Figures 1-16 shown, the application provides a powder metallurgy forming die for automobile transmission chain wheel, comprising a die seat 1, a top plate 2 connected by the support rods arranged on both sides of the die seat 1, and a cylinder 201 arranged on the top plate 2, further comprising a die pressing seat 3 connected with the telescopic end of the cylinder 201, a bottom die 7 cooperating with the die pressing seat 3 to shape the metal powder through the plasticizing groove 101 opened on the top surface of the die seat 1, a bottom die control assembly arranged in the die seat 1 and connected with the bottom die 7, and a die pressing linkage 6 connected between the bottom die control assembly and the die pressing seat 3 for position control of the top die 10 arranged on the bottom die 7 and the die pressing seat 3;

[0057] Among them, the top surface of the die seat 1 is also provided with a material moving assembly 5 for moving the shaped part after plasticizing and re-filling the plasticizing groove 101, and a drive box 4 for adaptive telescopic control of the material moving assembly 5 cooperating with the die pressing seat 3;

[0058] Specifically, the mold is in a longitudinal die pressing form, the top die 10 and the bottom die 7 are in a synchronous adjusting structure, the top die 10 is accommodated in the die pressing seat 3 when the mold is idle, and the bottom die 7 can be adjusted to set the thickness of the molded part, and the bottom die 7 can also be adjusted to eject the molded part;

[0059] Based on the above, Figure 2 and Figure 3 During the metal powder molding process, the material moving assembly 5 moves adaptively with the longitudinal displacement of the die pressing seat 3, that is, the material moving assembly 5 moves to the side of the driving box 4 in the accommodation state during die pressing, and moves to the side of the molding groove 101 in the unfolded state after the molding is separated, and the material is moved by the push plate 502. During the material moving process, the storage frame 501 fills the material when passing through the molding groove 101, and smoothes the metal powder on the surface of the molding groove 101 and cleans the residual metal powder near the molding groove 101 when returning.

[0060] In order to realize the die pressing effect of the die pressing seat 3, the bottom die control assembly in the die seat 1 can also be controlled by the motor 301 to achieve the molding thickness adjustment and discharging effect, as shown in Figures 7-13 The die pressing seat 3 includes a die pressing area and a transmission area, the die pressing area is provided with a fixed seat b14 and an adjusting part b12 which is threadedly connected with a threaded groove b1401 provided on the fixed seat b14;

[0061] As shown in Figure 9 , Figure 10 and Figure 11 The transmission area is provided with a gear c13, the top is provided with a motor 301 connected with the gear c13 through a shaft, and the gear c13 is engagedly connected with the adjusting part b12 through a transmission opening 302 between the die pressing area and the transmission area;

[0062] As shown in Figure 13 The adjusting part b12 includes a transmission sleeve b1202 and a threaded sleeve b1203 in an integral structure, a connecting seat b1201 connected with the top die 10 and limited to rotate in the transmission sleeve b1202 and the threaded sleeve b1203, the connecting seat b1201 and the top die 10 are provided with position corresponding and communicating holes, the transmission sleeve b1202 is engaged with the gear c13, and the threaded groove b1401 is provided with a molding column 11 which penetrates through the hole of the connecting seat b1201 and extends into the hole of the top die 10;

[0063] Further, the mold pressing area and the transmission area are two partitions in the integrated mold pressing seat 3, and the driving of the gear c13 in the transmission area is driven by the motor 301 at the top of the mold pressing seat 3, and the gear c13 is the driving element of the adjusting part b12 in the mold pressing area, and the transmission port 302 is in meshing state with the transmission sleeve b1202 of the adjusting part b12;

[0064] At the same time, by Figure 7 、 Figure 8 、 Figure 9 and Figure 10 It is shown that the top die 10 is connected to the connecting seat b1201, and since the fixed seat b14 is provided with a plastic column 11 matched with the structure of the molded part, and is in turn penetrated with the connecting seat b1201 and the top die 10, it can be known that the top die 10 and the connecting seat b1201 will be limited on the plastic column 11, and when the gear c13 drives the connecting seat b1201, the threaded sleeve b1203 will form a spiral lifting between the threaded groove b1401 in the fixed seat b14, and since the connecting seat b1201 is in limited rotation state between the transmission sleeve b1202 and the threaded sleeve b1203, when the transmission sleeve b1202 and the threaded sleeve b1203 move synchronously, the connecting seat b1201 will be driven to move longitudinally, so that the top die 10 will move with the connecting seat b1201, thereby achieving the effect of adjusting the position of the top die 10;

[0065] It should be noted that since the connecting seat b1201 and the top die 10 are in an integrated connection state, for the plastic column 11 at this position, only the connecting seat b1201 needs to be limited, and the transmission sleeve b1202 does not contact the top die 10, and when the top die 10 enters the mold pressing groove 101 for mold pressing, the hole groove of the top die 10 will be embedded with the plastic column 11 on the bottom die 7, and since the thickness of the plastic has a corresponding range limit, and the thickness size difference of the same specification part is not too large, only the corresponding hole groove of the top die 10 and the connecting seat b1201 needs to have a permissible gap distance, and for this case, the top die 10 can be thickened to lengthen the hole groove of the top die 10, and the plastic column 11 at the top die 10 can only be partially embedded with the connecting seat b1201, which adapts to the maximum limit of the top die 10, and does not affect the mold pressing;

[0066] In order to adapt the gear c13 and the extension of the top die 10, the length of the transmission sleeve b1202 needs to exceed the distance of the maximum extension of the top die 10, so that the maximum distance of the top die 10 moving to the outside of the mold pressing seat 3 and completely accommodating in the mold pressing seat 3 is in meshing state with the gear c13, and the length of the threaded sleeve b1203 is set according to the length of the transmission sleeve b1202, only the top die 10 needs to be in the threaded groove b1401 or most of it in the threaded groove b1401 when it is in the maximum extension.

[0067] In order to realize the correspondence and matching of the bottom die 7 and the top die 10 adjustment, as shown in Figures 7-12 , the bottom die control assembly comprises a fixed seat a8 provided with a threaded groove a802, an adjusting part a9 connected with the bottom die 7 at one end and threadedly connected in the threaded groove a802 at the other end, a gear b801 rotatably connected beside the threaded groove a802 and engagedly connected with the adjusting part a9;

[0068] Among them, as shown in Figure 6 , Figure 8 , Figure 9 and Figure 12 , the threaded groove a802 is internally provided with a plastic column 11 extending through the adjusting part a9 and the bottom die 7 and extending to the plastic groove 101;

[0069] At the same time, as shown in Figure 12 , the above-mentioned adjusting part a9 comprises a transmission sleeve a902 and a threaded sleeve a903 in one-piece structure, a connecting seat a901 connected with the bottom die 7 and rotatably limited in the transmission sleeve a902 and the threaded sleeve a903, and a hole groove is formed in the connecting seat a901 and the bottom die 7 in position corresponding and in communication structure;

[0070] Specifically, the bottom die control assembly as a whole is basically the same in structure and adjustment mode as the components in the transmission area and the molding area of the mold pressing seat 3, and the position adjustment of the bottom die 7 is realized through the threaded transmission structure of the adjusting part a9, and the difference lies in that it comprises the following:

[0071] ①The connecting form and function of the plastic column 11 at the bottom die 7 and the plastic column 11 at the top die 10 are different, specifically, the plastic column 11 at the bottom die 7 will be in a fixed state and always in a complete penetrating state with the bottom die 7 and the connecting seat a901, and the plastic column 11 at the bottom die 7 serves to limit the movement of the bottom die 7 and the plastic column 11 at the top die 10 only serves to limit the movement;

[0072] ②The position adjustment of the bottom die 7 through the adjusting part a9 mainly realizes the limitation of the thickness of the plastic part, and at the same time, the plastic part after plastic can be moved to the surface of the mold seat 1 by the bottom die 7 driven by the adjusting part a9 to achieve the effect of ejection, and the position adjustment of the top die 10 through the adjusting part b12 mainly serves to protect the effect of storage;

[0073] It should be noted that the bottom die 7 is matched with the size of the molding groove 101, and the adjusting part a9 is smaller than the molding groove 101 as a whole, so as to release the adjusting restriction of the adjusting part a9 on the bottom die 7, avoid the phenomenon that the adjusting part a9 is too large to be stuck with the molding groove 101, and adopt the same direction position adjusting form for the screw thread adjustment of the top die 10 and the bottom die 7. The same direction position adjusting form can ensure that the top die 10 will follow the adjustment of the bottom die 7 to make corresponding adjustment, so that the displacement difference of the mold pressing seat 3 in the mold pressing process is small, and on the other hand, after the top die 10 is accommodated in the mold pressing seat 3, the bottom die 7 can also seal the molding opening, so as to avoid the problem that the metal powder or dust enters the molding groove 101, causing difficult cleaning. In addition, the position of the overflow of the top die 10 can roughly identify the depth of the cavity formed by the bottom die 7 and the molding groove 101.

[0074] In order to realize the synchronous control of the top die 10 and the bottom die 7 without affecting the mold pressing, as shown in Figures 6-14 The mold pressing linkage 6 includes a bottom fixed on the driving area of the mold pressing seat 3, a cylindrical seat 15 which can enter the inside of the mold base 1 through the through hole 102 opened on the mold base 1, a sleeve 16 which is limited to rotate in the inside of the cylindrical seat 15 and is connected with the center of the bottom of the gear c13 through a shaft, and a toothed rod 17 which is connected with the center of the gear b801 through the through hole 102 and can be embedded into the inside of the sleeve 16 through the toothed cavity 1601 opened on the sleeve 16.

[0075] Specifically, the mold pressing linkage 6 adopts a telescopic meshing transmission mode, as shown in Figure 14 The cylindrical seat 15 is a fixed connecting part, the sleeve 16 is a rotating main driving element limited in the cylindrical seat 15, and the toothed rod 17 is a transmission connecting part driven by the sleeve 16. During the mold pressing process of the mold pressing seat 3, the toothed rod 17 can be driven by the sleeve 16 and can be adaptedly moved in the sleeve 16 in cooperation with the telescopic mold pressing seat 3, so as to achieve the independence of the telescopic and rotating functions. That is to say, the mold pressing process and the top die 10 and the bottom die 7 can cooperate with each other, but the adjusting process does not affect each other, so as to realize the independent control.

[0076] Among them, as shown in Figure 9 and Figure 14As shown, the two ends of the cylindrical seat 15 are in communication structure, and the side end of the cylindrical seat 15 is longitudinally and linearly provided with a gear slot a1501, and a transmission connecting cavity is provided at the position corresponding to the gear slot a1501 on the side wall of the through hole 102, and a gear a103 is arranged at the cavity opening of the transmission connecting cavity and can engage with the gear slot a1501. When the gear slots a1501 are linearly arranged, a gap needs to be reserved between the cylindrical seat 15 and the mold pressing seat 3, and no gear slot a1501 is arranged in the gap. The gap part does not participate in the control of the material moving assembly 5. That is, the last gear slot a1501 before entering the gap has completed the control of the material moving assembly 5, so that the material moving assembly 5 has been moved to the corresponding position. After the mold pressing and plastic molding of the ejector 10, before contacting the last gear slot a1501 of the gap, considering the reciprocating linear movement of the material moving assembly 5, the position is ensured, and the mold pressing seat 3 is avoided to be too close or touched. For the limitation of the gap length, it is necessary to ensure that the ejector 10 is completely separated from the plastic molding groove 101, and then the driving control of the material moving assembly 5 is performed.

[0077] It should be noted that since the plastic parts of metal powder are mostly small or commonly used parts, including gears, special-shaped parts, etc., the thickness range value of such parts can be determined according to their application range. At the same time, the range value belongs to a small range of adjustment or the adjustment interval difference is not large. For the above gap length, it can be matched and set with the range. The final purpose of this mode is to ensure that the material moving assembly 5 does not contact the mold pressing seat 3, and the setting period may also be set according to the distance between the mold pressing seat 3 and the mold seat 1 after the mold pressing reset, the distance before and after the movement of the material moving assembly 5, the transmission rate of the material moving assembly 5 and other factors. Among them, the transmission rate of the material moving assembly 5 also includes the engagement transmission ratio in the driving part 18.

[0078] In order to drive the material moving assembly 5, as shown in Figure 6 , Figure 15 and Figure 16 , a transmission groove 104 in communication with the driving box 4 is arranged on the mold seat 1 at the bottom of the driving box 4, and a driving part 18 for driving the material moving assembly 5 through the gear a103 is arranged in the transmission groove 104.

[0079] Among them, the driving part 18 includes a gear roller 1801 rotatably connected with the inner wall of the transmission groove 104, a bevel gear a1802 arranged at the side end of the gear roller 1801, a bevel gear b1803 radially engaged with the bevel gear a1802, a gear d1804 arranged on the bevel gear b1803, and a gear e1805 connected with the gear a103 through a shaft and engaged with the gear d1804.

[0080] A rod sleeve 401 for limiting the movement of the material moving assembly 5 is arranged in the driving box 4, and a strip-shaped driving port 402 is arranged at the corresponding position of the gear roller 1801 at the bottom of the rod sleeve 401.

[0081] Further, the driving box 4 mainly plays a role in limiting the movement of the material moving assembly 5 when the material moving assembly 5 is driven, through the rod sleeve 401 arranged in the box body. The rod sleeve 401 is in an integral structure with the box body, and the rod sleeve 401 is in a hollow structure and is in communication with both ends of the box body. Further, as shown in Figure 6 The driving member 18 is arranged in the transmission groove 104 of the mold base 1. The gear e1805 of the driving member 18 is connected with the gear a103 in the transmission connection cavity of the mold base 1 through the shaft rod, to realize transmission. According to the movement law of the material moving assembly 5 during the resetting and molding of the material moving assembly 5, the gear e1805 is reversely rotated in cooperation with the gear d1804, and the bevel gear b1803 on the gear d1804 is used to drive the bevel gear a1802 on the toothed roller 1801 in the radial direction, so that the toothed roller 1801 is driven according to the aforementioned movement law.

[0082] In order to realize the material moving of the material moving assembly 5 after the molding of the parts, the filling effect can also be achieved, as shown in Figure 6 and Figure 16 The material moving 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 supporting rods, a push rod 504 arranged at the other end of the material storage frame 501 and in through connection with the driving box 4 through the rod sleeve 401, and a tooth groove b505 linearly arranged at the bottom of the push rod 504 and in meshing connection with the toothed roller 1801. The material storage frame 501 is provided with a spade plate 503 in an integral structure at the bottom.

[0083] Specifically, the material moving assembly 5 adopts the combined structure of the push plate 502 and the hollow structure material storage frame 501. The volume of the material storage frame 501 needs to at least meet the filling amount at one time when storing the metal powder, and it is ensured that the metal powder does not overflow from the top of the material storage frame 501 during the movement of the material storage frame 501 with the metal powder. The material storage frame 501 can be provided in a conical or semi-closed structure at the top. The overall area of the material storage frame 501 needs to be greater than the molding groove 101. The maximum distance of the single movement of the material moving assembly 5 is that the material storage frame 501 completely passes through the molding groove 101. If the thickness of the metal powder accumulated in the material storage frame 501 exceeds the molding thickness, the maximum distance of the material moving assembly 5 can be the position where the center of the material storage frame 501 coincides with the center of the molding groove 101. The material storage frame 501 is provided with the spade plate 503 at the bottom. On the one hand, the metal powder can be moved together during the movement of the material storage frame 501. On the other hand, the overflowed metal powder in the molding groove 101 can be scraped and the residual metal powder near the molding area can be cleaned during the return of the material storage frame 501 after filling, to provide a molding environment for the top die 10.

[0084] In summary, the powder metallurgy forming die cooperates the die adjustment with the die pressing, thereby improving the adaptability of the metal powder in the cyclic forming, that is, the parts of different thicknesses can be continuously formed during the cyclic production, and the adjustment of the die is not affected during the reciprocating movement of the die pressing, thereby achieving the continuous cyclic production effect;

[0085] Meanwhile, based on the reciprocating movement of the material moving assembly 5 during the single die pressing, the formed part can be moved, and the forming groove 101 can be filled during the movement, which can effectively adapt to the die pressing rule and achieve the cooperative effect. The die is controlled by the control end connected to or installed on the die holder 1 to control the air cylinder 201 and the motor 301. By setting the corresponding control parameters through the control end, the automatic control of the equipment can be realized. The specific use process of the die includes the following:

[0086] S1. An automatic material injection mechanism can be arranged on the top side of the position where the material moving assembly 5 is reset. After each reset (i.e., the die pressing state between the top die 10 and the bottom die 7), the material storage frame 501 is injected once. In the first case, the die holder 3 is moved to drive the material moving assembly 5 to move the material moving assembly 5 to fill the forming groove 101. After filling, the die pressing operation can be performed, and the material moving assembly 5 is reset during the die pressing;

[0087] S2. After the forming is completed, the die holder 3 is separated by the air cylinder 201 until the formed part is moved out of the forming groove 101 or a certain distance (the position needs to be limited according to the length of the gap). After passing through the gap area, the material moving assembly 5 moves to intervene. In the foregoing process, first, there is a distance between the top die 10 and the bottom die 7, which provides a reserved gap for the material out of the bottom die 7. Second, it can fully ensure that the material moving assembly 5 will not touch the die holder 3;

[0088] S3. Based on S2, when the material moving assembly 5 moves to intervene, the motor 301 starts to drive the gear c13 inside the die holder 3 and the gear b801 on the bottom die control assembly in the die holder 1. The two gears drive the adjusting member b12 and the adjusting member a9, respectively. Due to the same direction rotation and the cooperation of the threaded structure, the top die 10 is received in the die holder 3, and the bottom die 7 moves the formed part to the forming groove 101. At this time, as the die holder 3 continues to move, the push plate 502 of the material moving assembly 5 moves the formed part to the placement area. As the push plate 502 moves, the material storage frame 501 enters the forming groove 101, and the metal powder in the material storage frame 501 fills the forming cavity formed by the forming groove 101 and the bottom die 7. At this time, the single die pressing forming is completed.

[0089] S4. According to whether the same thickness of the part is prepared by the second time stamping, one, the same thickness, the motor 301 will reverse the operation of S3 for the control of the two sets of adjusting parts, so that the bottom die 7 resets to the same position before, two, the thickness is different, the motor 301 will reverse the operation of S3 for the control of the two sets of adjusting parts, so that the bottom die 7 moves to the corresponding thickness position, at this time the metal powder in the storage frame 501 will enter the cavity formed by the bottom die 7 and the molding groove 101, the molding seat 3 again carries out the stamping operation, the material moving assembly 5 will reset the movement, through the bottom shovel plate 503 of the storage frame 501, the excess metal powder on the molding groove 101 is scraped flat, at the same time, the excess metal powder is removed with the storage frame 501 from the stamping area, to achieve the cleaning effect, after the top die 10 and the bottom die 7 are molded on the metal powder, the secondary stamping molding is finished, by repeating the steps of S2-S3, the purpose of circulating stamping molding can be achieved, after the stamping process is finished, the top die 10 is stored in the molding seat 3 by the motor 301, the port of the top die 10 can be closed by the cover, to achieve the protection of the top die 10, the bottom die 7 is in the position of ejection, also to the effect of closing the molding groove 101, avoid dust particles into the molding groove 101, cause difficult to clean.

[0090] The above is only the preferred embodiment of the present application, not any form of limitation on the present application; anyone skilled in the art can implement the invention according to the drawings shown in the specification and the above; however, those skilled in the art without departing from the scope of the technical solutions of the present application, make some changes, modifications and equivalent changes of the above disclosed technical content, are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essence of the present application, all still belong to the protection scope of the technical solutions of the present application.

Claims

1. A powder metallurgy molding die for manufacturing automotive transmission sprockets, 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) disposed on the top plate (2), characterized in that, It also includes a molding base (3) connected to the telescopic end of the cylinder (201), a bottom mold (7) that molds metal powder by means of a molding groove (101) opened on the top surface of the molding base (1) and the molding base (3), a bottom mold control component that is set inside the molding base (1) and connected to the bottom mold (7), and a molding linkage component (6) that is connected between the bottom mold control component and the molding base (3) for adjusting the position of the bottom mold (7) and the top mold (10) set on the molding base (3). Among them, the top surface of the mold base (1) is also provided with a material transfer component (5) for moving the plasticized molded part and refilling the plastic groove (101) and a drive box (4) for adaptively expanding and contracting the material transfer component (5) in conjunction with the molding base (3). The bottom mold control assembly includes a fixed seat a (8) 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 to the side of the threaded groove a (802) and meshing with the adjusting member a (9). The threaded groove a (802) is provided with a molding column (11) that penetrates the adjusting member a (9) and the bottom mold (7) and extends to the molding groove (101).

2. The powder metallurgy forming mold for preparing automotive transmission sprockets according to claim 1, characterized in that: The molding base (3) includes a molding area and a transmission area. The molding area is provided with a fixed base b (14) and an adjusting member b (12) that is threadedly connected to the threaded groove b (1401) provided on the fixed base b (14). The transmission zone is equipped with a gear c (13), and a motor (301) connected to the gear c (13) via a shaft is provided on the top. The gear c (13) is engaged with the adjusting member b (12) through a transmission port (302) opened between the molding zone and the transmission zone.

3. The powder metallurgy forming mold for preparing automotive transmission sprockets according to claim 2, characterized in that: The adjusting component b (12) includes a transmission sleeve b (1202) and a threaded sleeve b (1203) in an integral structure, and a connecting seat b (1201) connected to the top mold (10) and limited to rotating within the transmission sleeve b (1202) and the threaded sleeve b (1203). The connecting seat b (1201) and the top mold (10) have corresponding holes and slots in a communicating structure. Among them, the transmission sleeve b (1202) meshes with the gear c (13); The bottom of the threaded groove b (1401) is provided with a molding column (11) that passes through the hole of the connecting seat b (1201) and extends into the hole of the top mold (10).

4. The powder metallurgy forming mold for preparing automotive transmission sprockets according to claim 1, characterized in that: The adjusting component a (9) includes a transmission sleeve a (902) and a threaded sleeve a (903) in an integral structure, and a connecting seat a (901) connected to the bottom mold (7) and limited to rotating within the transmission sleeve a (902) and the threaded sleeve a (903). The connecting seat a (901) and the bottom mold (7) have corresponding holes and slots in a connected structure.

5. The powder metallurgy forming mold for preparing automotive transmission sprockets according to claim 2, characterized in that: The molding linkage (6) includes a cylindrical seat (15) fixed to the bottom of the transmission area on the molding base (3) and accessible through the through hole (102) on the mold base (1) to the inside of the mold base (1), a sleeve (16) that is limited to rotating inside the cylindrical seat (15) and connected to the bottom center of the gear c (13) through a shaft, and a toothed rod (17) whose one end can be inserted into the sleeve (16) through the toothed cavity (1601) on the sleeve (16) and whose other end is connected to the center of the gear b (801) through the through hole (102). The two ends of the cylindrical seat (15) are connected, and the side end of the cylindrical seat (15) is longitudinally linearly provided with a toothed groove a (1501).

6. The powder metallurgy forming mold for preparing automotive transmission sprockets according to claim 5, characterized in that: A transmission connection cavity is provided at the position corresponding to the tooth groove a (1501) on the side wall of the through hole (102), and a gear a (103) that can mesh with the tooth groove a (1501) is provided at the opening of the transmission connection cavity.

7. The powder metallurgy forming mold for preparing automotive transmission sprockets according to claim 6, characterized in that: The bottom of the drive box (4) has a transmission groove (104) that communicates with the drive box (4). The transmission groove (104) is provided with a drive component (18) that drives the material transfer assembly (5) through gear a (103). The driving component (18) includes a toothed roller (1801) rotatably connected to the inner wall of the transmission groove (104), a bevel tooth a (1802) disposed on the side end of the toothed roller (1801), a bevel tooth b (1803) radially meshing with the bevel tooth a (1802), a gear d (1804) disposed on the bevel tooth b (1803), and a gear e (1805) connected to the gear a (103) via a shaft and meshing with the gear d (1804). The drive box (4) is provided with a rod sleeve (401) for moving and limiting the material transfer component (5). The bottom of the rod sleeve (401) is provided with a strip-shaped drive port (402) corresponding to the toothed roller (1801).

8. The powder metallurgy forming mold for preparing automotive transmission sprockets according to claim 7, characterized in that: The material transfer assembly (5) includes a storage frame (501), a push plate (502) connected to one end of the storage frame (501) by multiple sets of support rods, and a push rod (504) disposed at the other end of the storage frame (501) and connected to the drive box (4) through a rod sleeve (401). The bottom of the push rod (504) is linearly provided with a toothed groove b (505) that meshes with the toothed roller (1801). The bottom of the storage box (501) is provided with a shovel plate (503) with an integrated structure.

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