Cross shaft frame forging punching die

Abstract

The utility model discloses a cross shaft frame forge piece punching die, including punch upper die holder, punch lower die holder, punch male die and punch female die, and the punch female die is internally provided with the blanking hole that is upper and lower through -transmission, and the punch female die top is provided with the positioning recess around the blanking hole upper end port, the punch lower die holder is internally provided with the waste groove that is located below the blanking hole and is connected with the blanking hole, and the punch lower die holder front side is provided with the take -out port that is horizontally communicated with the waste groove. The utility model first fixes the punch male die, then places the punch female die into the circular groove of punch lower die holder, drives the punch female die horizontal rotation through the drive adjustment force adding groove, makes the adjustment punch rod correspond after the upper and lower of blanking hole and tightens the lower connecting bolt and makes the punch female die fixed, makes the punch male die and punch female die correspond and install, thereby ensures that the punch rod can only impact final forging continuous skin when punching operation, guarantees that the forge piece is not damaged.

Description

Technical Field

[0001] This utility model belongs to the field of automotive industry technology, specifically relating to punching molds for cross shaft frame forgings. Background Technology

[0002] The cross-shaft frame component is used in a compact double universal joint. The double universal joint is a key component for meeting the complex off-road requirements of all-wheel-drive vehicles. Its unique structural design ensures stable power transmission to the wheels even when the driveshaft angle changes. When wheel steering or bumps cause dynamic changes in the driveshaft angle, this component eliminates speed fluctuations, achieving complete synchronous rotation of the input / output shafts. Its double structure (two universal joints connected in series via an intermediate shaft) compensates for angular velocity differences through a specific phase arrangement, avoiding the torque fluctuations of traditional single universal joints. This compact double universal joint offers excellent space adaptability, significantly reducing the deflection angle required for a single universal joint, allowing for a more compact driveshaft layout, making it particularly suitable for special vehicles such as military off-road vehicles with limited chassis space.

[0003] The final forging of the cross shaft frame needs to withstand significant torque and stress during operation, and a forged blank is generally used to ensure its strength. For example... Figure 1 , Figure 2 yes Figure 3 As shown, the cross shaft frame forging has a rectangular frame structure with arc-shaped surfaces on all four sides. In the front view, two opposite surfaces are thick-walled, and the other two opposite surfaces are thin-walled. There are two protruding shafts 1 on the outer sides of the two opposite planes, and a rectangular through hole 2 in the middle of the forging. This type of cross shaft frame is usually manufactured by forging. After final forging, there is still about 3mm of final forging skin inside the rectangular through hole 2, which needs to be punched off. The outer shape and inner hole of the forging are both rectangular. During punching, it is necessary to ensure that the forging, punch, and punch die are aligned with each other; otherwise, the punching shape will be misaligned, which may lead to the scrapping of the forging in severe cases. Utility Model Content

[0004] In order to solve the above-mentioned technical problems in the prior art, this utility model provides a cross shaft frame forging punching die that facilitates the adjustment of the upper and lower alignment of the punching punch and punching die and ensures that the forging is not damaged during the punching operation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a punching die for a cross shaft frame forging, including an upper punching die set, a lower punching die set, a punching punch, and a punching die. The upper punching die set is fixedly installed on the movable punching head of the punching press. The punching punch is fixedly located at the bottom of the upper punching die set. The lower punching die set is fixedly installed on the worktable of the punching press. The punching die is fixed on the lower punching die set. The punching punch is located directly above the punching die. The punching die has a through-hole for material discharge. The top surface of the punching die has a positioning groove around the upper end of the material discharge hole. The lower punching die set has a scrap trough located below and connected to the material discharge hole. The front side of the lower punching die set has an outlet that is horizontally connected to the scrap trough.

[0006] The punching die is disc-shaped, and the lower punching die set has a circular groove with an open top. The outer diameter of the punching die is similar to the diameter of the circular groove. The punching die is coaxially set in the circular groove of the lower punching die set. Two adjusting force grooves are symmetrically provided at the center of the edge of the punching die. The punching die is fixedly connected to the lower punching die set along the circumferential direction by several lower connecting bolts.

[0007] The punching punch includes a connecting plate and a punching rod. The connecting plate is fixedly connected to the upper punching die frame by several upper connecting bolts. The punching rod is vertically arranged and corresponds to the blanking hole. The upper end of the punching rod is fixedly connected to the bottom surface of the connecting plate.

[0008] The horizontal cross-sectional profiles of both the blanking hole and the punching rod are rectangular.

[0009] The positioning groove is 5mm deep, and the edge contour of the positioning groove is adapted to the lower outer contour of the cross shaft frame final forging.

[0010] By adopting the above technical solution, this utility model has the following beneficial effects: 1) The punching punch in the punching die is designed as a single unit, meaning the connecting plate and the punching rod are integrated. The connecting plate is also disc-shaped and is fixed to the upper punching die frame using several circumferentially arranged upper connecting bolts. The punching rod has a rectangular cross-section, matching the shape of the final forging strip. The top surface of the punching die has a positioning groove around the upper end of the blanking hole to position the placed final forging, ensuring that the punching rod aligns vertically with the final forging strip and preventing misalignment during punching.

[0011] 2) The disc-shaped punching die is assembled in the circular groove of the punching lower die holder. By inserting a force rod into the force rod adjustment groove, the punching die is driven to rotate in the circular groove to adjust the upper and lower alignment of the punching rod with the blanking hole. After adjustment, tighten the lower connecting bolt to fix the punching die and the punching lower die holder into one piece.

[0012] 3) During punching, the final forging skin is punched off and falls into the scrap trough through the discharge hole for temporary storage. Finally, it is taken out through the front outlet, which is convenient for operation.

[0013] In summary, this utility model first fixes the punching punch, then places the punching die into the circular groove of the lower punching die holder. By driving the adjusting force groove, the punching die is driven to rotate horizontally, so that the adjusting punching rod is aligned with the blanking hole. Then, the lower connecting bolt is tightened to fix the punching die, so that the punching punch and the punching die are installed in a vertically aligned manner. This ensures that the punching rod can only impact the final forging skin during the punching operation, thus ensuring that the forging is not damaged. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the final forging of the cross shaft frame; Figure 2 This is a frontal projection view of the final forging of the cross-shaft frame; Figure 3 yes Figure 2 Top view; Figure 4 This is a cross-sectional view of the final forging with the forging skin attached after the final forging process; Figure 5 This is a schematic diagram of the vertical cross-sectional structure of a punching die; Figure 6 yes Figure 5 Top view of the punch die; Figure 7 yes Figure 5 Bottom view of the punch. Detailed Implementation

[0015] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] like Figures 5-7As shown, the punching die for the cross shaft frame forging of this utility model includes an upper punching die set 42, a lower punching die set 43, a punching punch, and a punching die 45. The upper punching die set 42 is fixedly installed on the movable punch head of the punching press. The punching punch is fixedly located at the bottom of the upper punching die set 42. The lower punching die set 43 is fixedly installed on the worktable of the punching press. The punching die 45 is fixed on the lower punching die set 43. The punching punch is located directly above the punching die 45. The punching die 45 has a through-hole 46. The top surface of the punching die 45 has a positioning groove 47 around the upper end of the blanking hole 46. The positioning groove 47 has a depth of 5mm. The edge contour of the positioning groove 47 matches the lower outer contour of the final cross shaft frame forging. The punching die 45 is disc-shaped. The lower punching die set 43 has a circular groove with an open top. The outer diameter of the punching die 45 is approximately equal to the diameter of the circular groove. The punching die 45 is coaxially arranged within the circular groove of the lower punching die set 43. Two adjusting force grooves 48 are symmetrically arranged at the center of the edge of the punching die 45. The punching die 45 is fixedly connected to the lower punching die set 43 along the circumferential direction by several lower connecting bolts. The lower punching die set 43 has a scrap groove 49 located below the circular groove and communicating with the blanking hole 46. The front side of the lower punching die set 43 has an outlet that is horizontally connected to the scrap groove 49. The punching punch includes a connecting plate 50 and a punching rod 51. The connecting plate 50 is fixedly connected to the upper punching die set 42 by several upper connecting bolts. The punching rod 51 is vertically arranged and corresponds vertically to the blanking hole 46. The upper end of the punching rod 51 is fixedly connected to the bottom surface of the connecting plate 50. The horizontal cross-sectional profiles of the blanking hole 46 and the punching rod 51 are both rectangular.

[0017] The punching process involves placing the final forging 38 into the punching die on the forging press. The structure of the final forging 38 is as follows: Figure 4 As shown.

[0018] The process of installing the punching die onto the press is as follows: Connect the connecting plate 50 of the punching punch to the bottom surface of the upper punching die holder 42 and insert the upper connecting bolts. Then place the punching die 45 into the circular groove of the lower punching die holder 43. Insert two force rods into an adjusting force groove 48 respectively, apply force to the force rods to rotate the lower punching die in the circular groove, so that the screw holes on the punching die 45 align with the screw holes on the lower punching die holder 43. Insert the lower connecting bolts, and then operate the force rods to align the punching rod 51 of the punching punch with the blanking hole 46 on the punching die 45. Finally, tighten all the upper and lower connecting bolts with a wrench to complete the installation and positioning of the punching die. The specific process of punching is as follows: After the final forging 38 is upside down, it is placed in the positioning groove 47 of the punching die 45. At this time, the square column hole 37 is facing upward and the arc-shaped step groove 39 is located below the final forging skin 40. The final forging 38 is positioned in the horizontal direction. The punching press is started, and the punching punch moves downward quickly. The punching rod 51 extends into the square column hole 37 to punch open the final forging skin 40. The detached final forging skin 40 falls into the scrap groove 49 through the discharge hole 46 for temporary storage. Finally, the punched final forging skin 40 is taken out through the take-out outlet. The process step groove 35 is set to prevent the burrs after punching out the final forging skin 40 from protruding outside the final forging 38. After punching, the punching punch moves upward quickly and takes out the final forging 38, completing the punching operation of one final forging 38.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A punching die for a cross-shaped frame forging, comprising an upper punching die set, a lower punching die set, a punching punch, and a punching die, wherein the upper punching die set is fixedly mounted on the movable punch head of a punching press, the punching punch is fixedly located at the bottom of the upper punching die set, the lower punching die set is fixedly mounted on the worktable of the punching press, the punching die is fixedly mounted on the lower punching die set, and the punching punch is located directly above the punching die, characterized in that: The punching die has a through-hole for material feeding, and the top surface of the punching die has a positioning groove around the upper end of the material feeding hole. The punching die holder has a scrap groove located below the material feeding hole and connected to the material feeding hole. The front side of the punching die holder has an outlet that is horizontally connected to the scrap groove.

2. The punching die for the cross shaft frame forging according to claim 1, characterized in that: The punching die is disc-shaped, and the lower punching die set has a circular groove with an open top. The outer diameter of the punching die is similar to the diameter of the circular groove. The punching die is coaxially set in the circular groove of the lower punching die set. Two adjusting force grooves are symmetrically provided at the center of the edge of the punching die. The punching die is fixedly connected to the lower punching die set along the circumferential direction by several lower connecting bolts.

3. The punching die for the cross shaft frame forging according to claim 1 or 2, characterized in that: The punching punch includes a connecting plate and a punching rod. The connecting plate is fixedly connected to the upper punching die frame by several upper connecting bolts. The punching rod is vertically arranged and corresponds to the blanking hole. The upper end of the punching rod is fixedly connected to the bottom surface of the connecting plate.

4. The punching die for the cross shaft frame forging according to claim 3, characterized in that: The horizontal cross-sectional profiles of both the blanking hole and the punching rod are rectangular.

5. The punching die for the cross shaft frame forging according to claim 1, characterized in that: The positioning groove is 5mm deep, and the edge contour of the positioning groove is adapted to the lower outer contour of the cross shaft frame final forging.

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