Cross shaft frame forging flash trimming die

Abstract

The utility model discloses a cross axle frame forge piece flash trimming die, including trimming upper die frame, trimming lower die frame, trimming male die and trimming female die, trimming female die is provided with the blanking hole of up and down through -transmission in, and the blanking hole cross section is same with the outer contour when cross axle frame horizontal placement, and the trimming female die top surface is equipped with the same support ring of blanking hole cross section around blanking hole, trimming lower die frame is equipped with the blanking groove of being located below installation groove and being connected with blanking hole, and trimming lower die frame front side is provided with the material taking opening of horizontal communication with blanking groove. The utility model discloses through trimming male die and trimming female die are positioned respectively in horizontal direction, thereby making lower trimming column and placing to the upper and lower correspondence of final forging of trimming female die support ring, ensure that the concave groove and annular groove of lower trimming column bottom surface respectively punch the upper profile and convex axle of final forging when trimming operation, thereby guaranteeing 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 a flash trimming mold 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 direction, 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 part of the forging. This type of cross shaft frame is usually manufactured by forging. After the final forging, a flash is attached to the outer side of the final forging, so the flash needs to be cut off (trimming). Due to the uneven distribution of the cross-sectional area of ​​the final forging, uneven stress will occur during trimming, making the forging prone to deformation and reducing product accuracy. In addition, it is necessary to ensure that the forging, trimming punch, and trimming die are aligned with each other during trimming; otherwise, the trimmed 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 flash trimming mold that facilitates the adjustment of the upper and lower alignment of the trimming punch and trimming die and ensures that the forging is not damaged during the trimming operation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a trimming die for a cross shaft frame forging, including an upper trimming die set, a lower trimming die set, a trimming punch, and a trimming die. The upper trimming die set is fixedly installed on the movable punch head of the trimming press. The trimming punch is fixedly located at the bottom of the upper trimming die set. The lower trimming die set is fixedly installed on the worktable of the trimming press. The trimming die is fixedly installed on the lower trimming die set. The trimming punch is located directly above the trimming die. The trimming die has a blanking hole that is open from top to bottom. The cross-section of the blanking hole is the same as the outer contour when the cross shaft frame is placed horizontally. The top surface of the trimming die has a support ring with the same cross-section as the blanking hole around the blanking hole. The lower trimming die set has a blanking groove located below the mounting groove and communicating with the blanking hole. The front side of the lower trimming die set has a material receiving port that is horizontally communicating with the blanking groove.

[0006] The trimming die is generally disc-shaped. The lower trimming die frame has a circular mounting groove with an open top. The outer diameter of the trimming die is approximately the same as the diameter of the mounting groove. The trimming die is coaxially set in the mounting groove of the lower trimming die frame. The edge of the trimming die has an inner inclined plane. The side wall of the mounting groove has an outer inclined plane corresponding to the inner inclined plane. A wedge-shaped groove is formed between the inner and outer inclined planes. A wedge-shaped block is provided in the wedge-shaped groove for positioning the horizontal position of the trimming die.

[0007] The trimming punch includes an upper plate and a lower trimming post. The upper plate is fixedly connected to the trimming upper die frame by several trimming connecting bolts arranged in a straight line. The bottom surface of the lower trimming post is provided with a concave groove in the shape of a playground track. The bottom of the lower trimming post is provided with arc-shaped grooves on both sides of the width direction of the concave groove, which are adapted to the outer circles of the two protruding shafts of the cross shaft frame final forging.

[0008] A positioning groove is provided on the bottom surface of the upper mold frame for cutting edge, and a positioning strip is integrally provided on the top surface of the upper plate. The positioning strip is assembled in the positioning groove. The cutting edge connecting bolt is a countersunk bolt. The cutting edge connecting bolt passes through the upper mold frame for cutting edge and the positioning strip from top to bottom, and then extends into and is threaded into the upper plate.

[0009] By adopting the above technical solution, this utility model has the following beneficial effects: 1) The disc-shaped cutting die is installed in the mounting slot of the cutting die holder. In order to ensure that the position of the blanking hole remains unchanged, a wedge groove is set on the edge of the cutting die and the side wall of the mounting slot. A wedge block is inserted into the wedge groove to ensure that the cutting die does not rotate.

[0010] 2) After trimming, the final forging is placed in the blanking hole. The thinner annular part of the flash is supported on the support ring at the top of the trimming die. The trimming punch presses downwards on the final forging. The lower trimming post at the lower end of the trimming punch presses the final forging downwards through the blanking hole into the blanking groove. The support ring plays the role of shearing the flash.

[0011] 3) The upper plate at the top of the trimming punch is fixedly connected to the trimming upper die frame via trimming connecting bolts spaced in a straight line. The assembly of the positioning strip and positioning slot ensures that the lower trimming post remains stable and does not rotate in the horizontal direction. The concave groove on the bottom surface of the lower trimming post mates with the top of the final forging, while the two arc-shaped grooves adapt to the outer circles of the two protruding shafts of the final forging. This ensures that the downward punching force of the lower trimming post on the final forging remains balanced during trimming, guaranteeing the stability of the final forging when it separates from the flash. After the trimming operation, the final forging is punched out and falls into the blanking groove through the blanking hole for temporary storage, and is finally removed through the front pick-up port.

[0012] In summary, the trimming punch of this utility model is positioned by assembling a positioning strip with a positioning groove on the upper trimming die frame and fastening it together with trimming connecting bolts. The trimming die is positioned horizontally by assembling a wedge block in a wedge groove between its outer circle and the inner circle of the mounting groove of the lower trimming die frame. This ensures that the lower trimming post corresponds vertically to the final forging placed on the trimming die support ring, guaranteeing that the concave groove and annular groove on the bottom surface of the lower trimming post press the upper contour and protruding shaft of the final forging respectively during trimming operations, thus preventing damage to the forging. Attached Figure Description

[0013] 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 three-dimensional structural diagram of a forged part with flash after the final forging process; Figure 5 This is a schematic diagram of the vertical cross-sectional structure of the trimming die; Figure 6 This is a schematic diagram of the edge-cutting die during edge cutting; Figure 7 yes Figure 6 Top view of the center cutting edge die; Figure 8 yes Figure 6 A three-dimensional structural diagram of the center-cutting punch from the upper side view; Figure 9 yes Figure 6 A three-dimensional structural diagram of the center-cutting punch from the lower side. Detailed Implementation

[0014] 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.

[0015] like Figures 5-9 As shown, the flash trimming die for the cross shaft frame forging of this utility model includes an upper trimming die set 53, a lower trimming die set 54, a trimming punch 55, and a trimming die 56. The upper trimming die set 53 is fixedly installed on the movable punch head of the trimming press. The trimming punch 55 is fixedly set at the bottom of the upper trimming die set 53. The lower trimming die set 54 is fixedly installed on the worktable of the trimming press. The trimming die 56 is fixedly installed on the lower trimming die set 54. The trimming punch 55 is located directly above the trimming die 56. The trimming die 56 has a blanking hole 57 that is open from top to bottom. The cross section of the blanking hole 57 is the same as the outer contour when the cross shaft frame final forging 38 is placed horizontally. The top surface of the trimming die 56 has a support ring 58 with the same cross section as the blanking hole 57 around the blanking hole 57. The trimming die 56 is generally disc-shaped. The trimming lower die holder 54 is provided with a mounting groove with a circular top opening. The outer diameter of the trimming die 56 is approximately the same as the diameter of the mounting groove. The trimming die 56 is coaxially arranged in the mounting groove of the trimming lower die holder 54. The edge of the trimming die 56 is provided with an inner inclined plane 66. The side wall of the mounting groove is provided with an outer inclined plane corresponding to the inner inclined plane 66. A wedge groove 59 is formed between the inner inclined plane 66 and the outer inclined plane. A wedge block 60 is provided in the wedge groove 59 for positioning the horizontal position of the trimming die 56. The lower die frame 54 for trimming is provided with a material discharge groove 61 located below the mounting groove and connected to the material discharge hole 57. The front side of the lower die frame 54 for trimming is provided with a material take-out port that is horizontally connected to the material discharge groove 61. The trimming punch 55 includes an upper plate 62 and a lower trimming post 63. The upper plate 62 is fixedly connected to the trimming upper die frame 53 by a number of trimming connecting bolts 67 arranged in a straight line. The bottom surface of the lower trimming post 63 is provided with a concave groove 64 in the shape of a playground track. The bottom of the lower trimming post 63 is provided with arc-shaped grooves 65 on both sides of the width direction of the concave groove 64, which are adapted to the outer circles of the two protruding shafts of the cross shaft frame final forging 38.

[0016] A positioning groove is provided on the bottom surface of the upper cutting mold frame 53, and a positioning strip 68 is integrally provided on the top surface of the upper plate 62. The positioning strip 68 is assembled in the positioning groove. The cutting connecting bolt 67 is a countersunk bolt. The cutting connecting bolt 67 passes through the upper cutting mold frame 53 and the positioning strip 67 from top to bottom and then extends into and is threaded into the upper plate 62.

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

[0018] The specific process of the trimming process is as follows: The punched final forging 38 is placed on the trimming die 56. The final forging 38 is located in the blanking hole 57 at the lower part of the flash 52. The bottom surface of the flash 52 is in contact with the top surface of the support ring 58. Since the cross section of the blanking hole 57 is the same as the outer contour when the cross shaft frame is placed horizontally, the final forging 38 is positioned horizontally in the blanking hole 57 at the lower part of the flash 52. Then, the trimming press is started, and the trimming punch 55 moves downward quickly. The concave groove 64 and the two arc grooves 65 at the bottom of the lower trimming column 63 press downward on the top of the final forging 38 and the upper part of the two protruding shafts, respectively. The final forging 38 is punched off and falls into the blanking groove 61 through the blanking hole 57. The final forging 38 of the cross shaft frame is taken out through the material removal port. After trimming, the trimming punch 55 moves upward quickly and removes the flash 52 from the support ring 58, completing the trimming 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 flash trimming die for a cross-shaft frame forging, comprising an upper trimming die set, a lower trimming die set, a trimming punch, and a trimming die, wherein the upper trimming die set is fixedly mounted on the movable punch head of a trimming press, the trimming punch is fixedly located at the bottom of the upper trimming die set, the lower trimming die set is fixedly mounted on the worktable of the trimming press, and the trimming die is fixedly mounted on the lower trimming die set, with the trimming punch located directly above the trimming die, characterized in that: The trimming die has a blanking hole that is open at both the top and bottom. The cross-section of the blanking hole is the same as the outer contour when the cross shaft frame is placed horizontally. The top surface of the trimming die has a support ring around the blanking hole with the same cross-section as the blanking hole. The trimming lower die frame has a blanking groove located below the mounting groove and connected to the blanking hole. The front side of the trimming lower die frame has a material pick-up port that is horizontally connected to the blanking groove.

2. The flash trimming die for cross shaft frame forgings according to claim 1, characterized in that: The trimming die is generally disc-shaped. The lower trimming die frame has a circular mounting groove with an open top. The outer diameter of the trimming die is approximately the same as the diameter of the mounting groove. The trimming die is coaxially set in the mounting groove of the lower trimming die frame. The edge of the trimming die has an inner inclined plane. The side wall of the mounting groove has an outer inclined plane corresponding to the inner inclined plane. A wedge-shaped groove is formed between the inner and outer inclined planes. A wedge-shaped block is provided in the wedge-shaped groove for positioning the horizontal position of the trimming die.

3. The flash trimming die for a cross-shaft frame forging according to claim 1 or 2, characterized in that: The trimming punch includes an upper plate and a lower trimming post. The upper plate is fixedly connected to the trimming upper die frame by several trimming connecting bolts arranged in a straight line. The bottom surface of the lower trimming post is provided with a concave groove in the shape of a playground track. The bottom of the lower trimming post is provided with arc-shaped grooves on both sides of the width direction of the concave groove, which are adapted to the outer circles of the two protruding shafts of the cross shaft frame final forging.

4. The flash trimming die for cross shaft frame forgings according to claim 3, characterized in that: A positioning groove is provided on the bottom surface of the upper mold frame for cutting edge, and a positioning strip is integrally provided on the top surface of the upper plate. The positioning strip is assembled in the positioning groove. The cutting edge connecting bolt is a countersunk bolt. The cutting edge connecting bolt passes through the upper mold frame for cutting edge and the positioning strip from top to bottom, and then extends into and is threaded into the upper plate.

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