WO2022242039A1

WO2022242039A1 - Composite mold for propeller shaft of car transmission having trimming correction function

Info

Publication number: WO2022242039A1
Application number: PCT/CN2021/127204
Authority: WO
Inventors: 胡明星; 金永福; 戚丹
Original assignee: 东风锻造有限公司
Priority date: 2021-05-21
Filing date: 2021-10-28
Publication date: 2022-11-24
Also published as: CN113245493A

Abstract

A composite mold for a propeller shaft of a car transmission which has a trimming correction function, comprising a lower die base (1), a die base (2), an ejector (7), and an upper die base (12). The die base (2) is provided in the middle at the upper end of the lower die base (1). A die (3) is provided at the upper end of the die base (2). A lower die spring (6) is provided in the die base (2). The ejector (7) is provided at the upper end of the lower die spring (6). A punch (15) is provided in the middle at the lower end of the upper die base (12). Screws (16) are provided at two sides of the punch (15). Upper die springs (17) are provided on peripheral walls of the screws (16). Material returning plates (18) are provided at the lower ends of the upper die springs (17), and nuts (19) are provided at the lower ends of the material returning plates (18).

Description

A Composite Die for Transmission Shaft of Car Transmission with Trimming Correction Function

technical field

The invention relates to the technical field of automobile mold process design, in particular to a composite mold for a transmission shaft of a car gearbox with trimming and correction functions.

Background technique

Car gearboxes have widely used bearing units, in which the transmission bearing unit is the connecting shaft between the input shaft and the output shaft of the gearbox. With the continuous expansion of the automobile market, the production capacity of forgings has also increased, especially the output of shaft forgings has increased. The transmission shaft is a shaft, and the product structure is complex and difficult to form. Open die forging is adopted, and after forming, it is necessary to cut off the flash and correct the flange.

Most of the existing composite molds for transmission shafts of car transmissions use traditional vertical forging transmission shafts to correct the flange after cutting off the flash, which is a two-step process. The mold base is a joint mold with two stations, which requires two people to complete. As a result, the labor cost is high. At the same time, the trimming quality stability and coaxiality of the existing composite mold for the transmission shaft of the car transmission are poor, and the coaxiality is poor, which cannot meet the requirements of the automatic production line. The production efficiency of the composite mold is low, the beat of the main machine is 8 seconds/beat, and the beat of the press is 10 seconds/piece. The beat of the press seriously affects the production efficiency. Therefore, a new type of transmission shaft with trimming correction function is urgently needed. Composite mold to solve existing problems.

Contents of the invention

The object of the present invention is to provide a composite mold for transmission shaft of car gearbox with trimming correction function in order to solve the above problems.

The present invention achieves the above object through the following technical solutions:

A composite mold for a transmission shaft of a car gearbox with a trimming correction function, comprising a lower die base, a die base, an ejector and an upper die base, the die base is provided in the middle of the upper end of the lower die base, and the The upper end of the die base is provided with a die, the upper end of the die base is provided with a discharge table, the joint between the die base and the die base is provided with a hexagon socket head screw, and the die base is provided with a lower mold spring, the upper end of the lower mold spring is provided with the ejector, both sides of the die base are provided with pressure plates, both sides of the upper end of the lower die base are provided with guide post blocks, and the upper end of the guide post block is provided with There is a guide post, the upper end of the guide post is provided with a guide sleeve, the upper end of the guide sleeve is provided with the upper mold base, the middle part of the upper end of the upper mold base is provided with a dovetail tenon, and the upper end of the dovetail tenon is provided with two hexagon socket screws. , the middle part of the lower end of the upper mold base is provided with a punch, both sides of the punch are provided with screws, the outer wall of the screw is provided with an upper mold spring, and the lower end of the upper mold spring is provided with a stripping plate, the A nut is arranged at the lower end of the stripping plate.

By adopting the above technical scheme, the design of the lower mold base, the concave mold base and the upper mold base can make the composite mold for the drive shaft of the car transmission change from a duplex step to a single step, and only one person is required. The operation can be completed, and the labor cost of the device operation is reduced. The design of the guide column, the concave die, the punch and the ejector can make the composite mold for the transmission shaft of the car gearbox pass through this reciprocating The mode of movement makes the die, the punch, and the ejector rely on the elastic deformation of the upper die spring and the lower die spring to effectively perform edge trimming and correction steps. It has good stability while improving the forging beat, and makes the trimming quality stable and coaxial, which meets the requirements of the automatic production line. The design of the screw and the stripping plate can make the car gearbox The production tact of the composite mold for the transmission shaft has been increased from the original 10 seconds/piece to the current 5 seconds/piece, and the tact has been doubled, thereby improving the production efficiency of the mold.

Further, the lower die base is connected to the die base through a slot, the die base is connected to the die through the hexagon socket head cap screws, and the discharge table is formed on the die .

By adopting the above technical solution, it is possible to make the loading of the mold on the workpiece more convenient.

Further, the hexagon socket head screw passes through the die, and the hexagon socket head screw is threaded with the die holder.

By adopting the above technical solution, the connection between the die and the die base can be made more stable.

Further, the die base is welded to the lower die spring, and the lower die spring is welded to the ejector.

By adopting the above technical solution, the die and the ejector can be effectively trimmed and corrected working steps relying on the elastic deformation of the lower die spring, which improves the stability while having good stability. Forge beats, and make the cutting edge quality stable.

Further, the die base is connected to the pressing plate by bolts, and the pressing plate is connected to the lower die base by bolts.

By adopting the above technical solution, the connection between the die base and the lower die base can be made more stable.

Further, the lower die base is welded to the guide post block, the guide post block is slidably connected to the guide post, the guide post is connected to the guide sleeve through a slot, and the guide sleeve is connected to the guide post. The upper die seat is welded.

By adopting the above technical solution, the working steps of the mold can be made smoother and more stable.

Further, the upper mold base is tenon-jointed with the dovetail tenon, and the dovetail tenon is threadedly connected with the two hexagon socket head cap screws.

By adopting the above technical solution, the load of the mold on the external pressure can be made more stable.

Further, the upper die base is welded to the punch.

By adopting the above technical solution, the connection of the punch can be made more stable.

Further, the upper die base is connected to the screw through a slot, the upper die spring is welded to the upper die base, and the upper die spring is welded to the stripper plate.

By adopting the above technical scheme, the production tempo of the mold can be increased from the original 10 seconds/piece to the current 5 seconds/piece, and the tempo is doubled, thereby improving the production efficiency of the mold.

Further, the stripper is connected to the nut through threads.

By adopting the above technical solution, the work of the stripper can be made more stable.

The specific working principle is: when in use, the staff can place the workpiece on the discharge table, and then apply pressure to the dovetail through an external pressure drive mechanism, driving the upper mold base and the punch downward. move, and then make the punch and the die combine to complete the pressing and forming of the workpiece on the discharge table. Since the cylindrical punch is used, it can perform the thermal correction function of the circumferential compression. The slider moves; the stripper plate is suspended by the screw and the bolt, the screw passes through the center of the upper mold spring, one end of the upper mold spring is connected with the upper mold base, and the other end is pressed against the upper mold base. The stripper plate has a pre-tightening force when the slider moves downward, and when the trimming is completed and the slider moves upward, there is a compression deformation force, which can press the stripper plate to press the flash, thereby So that the flash is not lifted up, it is neatly attached to the end face of the transmission shaft flange, and remains in place. At the same time, because the cylindrical die and the die holder are connected through the spring of the lower die, when cutting When trimming, the punch presses the transmission shaft and moves downward, so that the pressing force is transmitted to the lower mold spring to generate a compression deformation force. When the edge trimming is completed, the compression deformation force is released, and the lower mold spring carries the The ejector ejects the transmission shaft to the original position. During the whole process, the ejector never leaves the die base, and through the guide fit between the outer annular surface and the inner annular surface of the die base, Move up and down, lubricated with organic oil in the middle, and at the same time, the die is fixed on the end face of the die seat, and the inner opening blocks the outer ring of the ejector, so that the ejector does not stop when the spring force of the lower die is released. Break away from the die base, and reset the drive shaft forging body smoothly. Through this reciprocating movement mode, the punch, the die and the ejector are leaned against the lower die spring and the ejector. The above-mentioned elastic deformation of the mold spring can effectively carry out trimming and correcting work steps, and improve the forging cycle while maintaining good stability.

The beneficial effects of the present invention are:

1. By setting the design of the lower mold base, the die base and the upper mold base, the composite mold for the drive shaft of the car transmission can be changed from a duplex step to a single step, and only one person can complete the operation, reducing the installation work labor costs;

2. By setting the design of the guide column, die, punch and ejector, the composite mold for the transmission shaft of the car transmission can pass through this reciprocating motion mode, so that the gap between the die, punch and ejector Relying on the elastic deformation of the upper die spring and the lower die spring, the edge trimming and correcting steps are effectively carried out, which improves the forging cycle while having good stability, and makes the edge trimming quality stable, and the coaxiality is good, satisfying Requirements for automated production lines;

3. Through the design of the screw and the stripper plate, the production cycle of the composite mold for the transmission shaft of the car transmission can be increased from the original 10 seconds/piece to the current 5 seconds/piece, and the cycle time is doubled, thereby improving the mold efficiency. Productivity.

Description of drawings

Fig. 1 is a structural representation of a composite mold for a transmission shaft of a car gearbox with a trimming correction function according to the present invention;

Fig. 2 is a front view of the concave mold in the composite mold for the transmission shaft of a car gearbox with trimming correction function according to the present invention;

Fig. 3 is a front view of the punch in the compound mold for the transmission shaft of a car gearbox with trimming correction function according to the present invention;

Fig. 4 is a front view of an ejector in a composite mold for a transmission shaft of a car transmission with trimming correction function according to the present invention.

The reference signs are explained as follows:

1. Lower mold base; 2. Die base; 3. Die; 4. Unloading platform; 5. Hexagon socket screw 1; 6. Lower mold spring; 7. Ejector; 8. Press plate; block; 10, guide post; 11, guide sleeve; 12, upper mold base; 13, dovetail tenon; 14, two hexagon socket screws; 15, punch; 16, screw; 17, upper mold spring; 19. Nut.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1-Fig. 4, a kind of composite mold for car gearbox transmission shaft with trimming correction function includes lower mold base 1, concave mold base 2, ejector 7 and upper mold base 12, the lower mold base Die base 1 upper middle part is provided with described die base 2, and described die base 2 upper end is provided with die 3, and described die 3 upper end is provided with discharging table 4, and described die 3 and described die The joint of the base 2 is provided with a hexagon socket head cap screw 1, the die base 2 is provided with a lower die spring 6, the upper end of the lower die spring 6 is provided with the ejector 7, and the two sides of the die base 2 Both are provided with a pressure plate 8, and both sides of the upper end of the lower mold base 1 are provided with guide post blocks 9, the upper end of the guide post block 9 is provided with a guide post 10, and the upper end of the guide post 10 is provided with a guide sleeve 11, the The upper end of the guide sleeve 11 is provided with the upper die holder 12, the upper middle part of the upper die holder 12 is provided with a dovetail tenon 13, the upper end of the dovetail tenon 13 is provided with a hexagon socket head cap screw 2 14, and the lower end middle part of the upper die holder 12 is arranged There is a punch 15, the two sides of the punch 15 are provided with screw rods 16, the outer wall of the screw rod 16 is provided with an upper mold spring 17, and the lower end of the upper mold spring 17 is provided with a material stripper 18, and the stripper The lower end of the plate 18 is provided with a nut 19. Through the design of the lower mold base 1, the die base 2 and the upper mold base 12, the composite mold for the transmission shaft of the car transmission can be changed from a duplex step to a simplex mold. step, only one person can complete the operation, reducing the labor cost of the device operation, through the design of the guide column 10, the die 3, the punch 15 and the ejector 7, the speed of the car can be changed The composite mold for box transmission shaft can pass through the mode of this reciprocating movement, so that the die 3, the punch 15, and the ejector 7 lean against the upper die spring 17 and the lower die spring 6 elastic deformation, effectively trimming and correcting work steps, while having good stability, it improves the forging cycle, and makes the quality of trimming stable, and the coaxiality is good, which meets the requirements of the automatic production line. The design of the screw rod 16 and the stripper plate 18 can increase the production tempo of the composite mold for the transmission shaft of a car transmission from the original 10 seconds/piece to the present 5 seconds/piece, double the tempo, and further improve Mold production efficiency.

In this embodiment, the lower die base 1 is connected to the die base 2 through a slot, the die base 2 is connected to the die 3 through the hexagon socket head cap screw-5, and the discharge table 4 is formed on the concave mold 3, which can make the loading of the mold to the workpiece more convenient.

In this embodiment, the inner hexagonal screw one 5 runs through the die 3, and the inner hexagonal screw one 5 is threadedly connected with the die base 2, so that the die 3 and the die base can be 2 connection is more stable.

In this embodiment, the die base 2 is welded to the lower die spring 6, and the lower die spring 6 is welded to the ejector 7, so that the die 3 and the ejector 7 can rely on According to the elastic deformation of the lower die spring 6, the edge trimming and correcting steps are effectively carried out, and the forging cycle is improved while having good stability, and the edge trimming quality is stabilized.

In this embodiment, the die base 2 is connected to the pressing plate 8 by bolts, and the pressing plate 8 is connected to the lower die base 1 by bolts, so that the die base 2 and the lower die base 1 can connection is more stable.

In this embodiment, the lower mold base 1 is welded to the guide post block 9, the guide post block 9 is slidably connected to the guide post 10, and the guide post 10 is connected to the guide sleeve 11 through a slot. , the guide sleeve 11 is welded to the upper mold base 12, which can make the working steps of the mold smoother and more stable.

In this embodiment, the upper mold base 12 is tenon-jointed with the dovetail tenon 13 , and the dovetail tenon 13 is threadedly connected with the hexagon socket head cap screw 2 14 , which can make the load of the mold on the external pressure more stable.

In this embodiment, the upper mold base 12 is welded to the punch 15, which can make the connection of the punch 15 more stable.

In this embodiment, the upper die base 12 is connected to the screw rod 16 through a slot, the upper die spring 17 is welded to the upper die base 12, and the upper die spring 17 is welded to the stripping plate 18 , can increase the production beat of the mold from the original 10 seconds/piece to the current 5 seconds/piece, double the beat, and then improve the production efficiency of the mold.

In this embodiment, the stripping plate 18 and the nut 19 are threadedly connected, which can make the stripping plate work more stably.

The specific working principle is: when in use, the staff can place the workpiece on the discharge table 4, and then apply pressure to the dovetail 13 through an external pressure driving mechanism to drive the upper mold base 2 And described punch 15 moves down, and then described punch 15 is combined with described die 3, completes the compression molding of workpiece on the described discharge table 4, because adopts the described punch of cylindrical shape 15. Plays the function of thermal correction of circumferential compression and moves with the slider; the stripper plate 18 is suspended in the air through the screw 16 and the bolt 19, and the screw 16 passes through the center of the upper mold spring 17, so One end of the upper die spring 17 is connected to the upper die base 12, and one end presses the stripper plate 18. When the slider moves downward, there is a pre-tightening force. When the edge trimming is completed and the slider moves upward, There is a compressive deformation force, which can press the stripping plate 18 to press the flash, so that the flash will not be lifted up, and it will be neatly attached to the end face of the transmission shaft flange, keeping it in place. At the same time, due to the cylindrical The die 3 and the die base 3 are connected through the lower die spring 6, when trimming, the punch 15 moves downward against the transmission shaft, so that the pressing force is transmitted to the lower die The spring 6 generates a compressive deformation force. When the edge trimming is completed, the compressive deformation force is released. The lower mold spring 6 takes the ejector 7 to push the transmission shaft to the original position. During the whole process, the ejector The ejector 7 has never left the die base 2, and moves up and down through the guide fit between the outer annular surface and the inner annular surface of the die base 2, with oil lubrication in the middle, while the die 3 is fixed on the The end surface of the die base 2 and the inner opening block the outer ring of the ejector 7, so that the ejector 7 does not break away from the die base 2 when the elastic force of the lower die spring 6 is released, so that the forging of the transmission shaft can be smoothly carried out. The body is reset, and through this reciprocating movement mode, the punch 15, the die 3 and the ejector 7 are leaned against the elastic deformation of the lower die spring 6 and the upper die spring 17 , Effectively carry out edge trimming and correcting steps, and improve the forging cycle while maintaining good stability.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention.

Claims

A composite mold for a transmission shaft of a car gearbox with a trimming correction function, characterized in that it comprises a lower mold base (1), a concave mold base (2), an ejector (7) and an upper mold base (12), The upper middle part of the lower die base (1) is provided with the die base (2), the upper end of the die base (2) is provided with a die (3), and the upper end of the die base (3) is provided with a discharge platform (4), the connection between the die (3) and the die holder (2) is provided with a hexagon socket head screw (5), and the die holder (2) is provided with a lower die spring (6) , the upper end of the lower die spring (6) is provided with the ejector (7), the two sides of the die base (2) are provided with pressing plates (8), and the lower die base (1) on both sides of the upper end All are provided with guide post blocks (9), the upper end of the guide post block (9) is provided with a guide post (10), the upper end of the guide post (10) is provided with a guide sleeve (11), and the guide sleeve (11) The upper end is provided with the upper die base (12), the middle part of the upper end of the upper die base (12) is provided with a dovetail tenon (13), and the upper end of the dovetail tenon (13) is provided with two hexagon socket screws (14). A punch (15) is arranged in the middle part of the lower end of the upper die base (12), and a screw rod (16) is arranged on both sides of the punch (15), and an upper die spring (17) is arranged on the peripheral wall of the screw rod (16). , the lower end of the upper mold spring (17) is provided with a material stripping plate (18), and the lower end of the stripping plate (18) is provided with a nut (19).
According to claim 1, a composite mold for a transmission shaft of a car transmission with a trimming correction function is characterized in that: the lower mold base (1) is connected to the concave mold base (2) through a slot, The die base (2) is connected to the die (3) through the hexagon socket head cap screw one (5), and the discharge table (4) is formed on the die (3).
According to claim 1, a composite mold for a transmission shaft of a car gearbox with a trimming correction function is characterized in that: the inner hexagonal screw one (5) runs through the concave mold (3), and the inner hexagonal Screw one (5) is threadedly connected with the die base (2).
According to claim 1, a composite mold for a transmission shaft of a car gearbox with trimming correction function is characterized in that: said die base (2) is welded to said lower mold spring (6), and said lower mold The mold spring (6) is welded to the ejector (7).
According to claim 1, a composite mold for a transmission shaft of a car transmission with trimming correction function is characterized in that: the die base (2) is connected to the pressing plate (8) by bolts, and the pressing plate (8) is connected with the lower mold base (1) by bolts.
According to claim 1, a composite mold for a transmission shaft of a car transmission with trimming correction function is characterized in that: the lower mold base (1) is welded to the guide column block (9), and the guide column block (9) is welded. The column block (9) is slidingly connected with the guide post (10), the guide post (10) is connected with the guide sleeve (11) through a draw-in groove, and the guide sleeve (11) is connected with the upper mold base ( 12) Welding.
According to claim 1, a composite mold for a transmission shaft of a car transmission with a trimming correction function is characterized in that: the upper mold base (12) is mortised with the dovetail (13), and the dovetail Tenon (13) is threadedly connected with described hexagon socket head cap screw two (14).
A composite mold for a transmission shaft of a car gearbox with trimming correction function according to claim 1, characterized in that: said upper mold base (12) is welded to said punch (15).
A composite mold for a transmission shaft of a car gearbox with trimming correction function according to claim 1, characterized in that: said upper mold base (12) is connected with said screw (16) through a draw-in groove, said The upper mold spring (17) is welded with the upper mold base (12), and the upper mold spring (17) is welded with the stripping plate (18).
The composite mold for transmission shaft of car gearbox with trimming correction function according to claim 1, characterized in that: said stripper plate (18) and said nut (19) are connected by threads.