A crankshaft forging trimming die with adjustable blade angle and a method of using the same

Abstract

The present application relates to a kind of cutting edge adjustable crank forging cutting die and its using method, belong to mould field, including lower die seat and upper die cutting edge ring, the inside of upper die cutting edge ring is provided with blade edge, the blade edge of upper die cutting edge ring is provided with notch towards lower die seat direction, sliding seat is installed in notch, sliding direction of sliding seat is perpendicular to the blade edge edge of position;One end of blade angle plate is rotatably connected to the side of sliding seat towards lower die seat, the rotation axis of blade angle plate is perpendicular to the sliding direction of sliding seat, the other end of blade angle plate is flush with the blade edge edge of upper die cutting edge ring, driving assembly that drives blade angle plate swing is also provided in notch.The beneficial effects of the present application are: the part blade edge position of upper die cutting edge ring produces burr when cutting edge, swing blade angle plate changes the blade angle of this place, reduces cutting edge burr production, improves production efficiency and product quality, sliding seat drives blade angle plate to move, changes the length that blade angle plate extends notch, adjusts the gap between blade angle plate and blank.

Description

Technical Field

[0001] This invention relates to the field of molds, specifically to a crankshaft forging edge trimming mold with adjustable cutting edge angle and its method of use. Background Technology

[0002] The crankshaft is an important component of an engine. To ensure its physical strength and mechanical properties, it is usually formed by hot forging of a blank. However, due to the limitations of the forming characteristics of hot forged parts, as well as the influence of the die closing height accuracy, a flash will form on the parting surface of the crankshaft after final forging. It is necessary to use a trimming die to trim the crankshaft.

[0003] After trimming, tiny burrs will appear at the parting surface of the crankshaft forging. This defect will cause the produced crankshaft to fail to meet the required precision, and the reduced surface finish will make it difficult to be classified as a high-quality component. To meet the high standards of automakers for parts, a deburring process is often added after trimming, which increases production costs and reduces manufacturing efficiency.

[0004] In the prior art, such as the patent application number "CN202010134799.9" which discloses a die for cutting flash on a crankshaft forging, residual flash is disclosed, but the burr problem is not solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a crankshaft forging edge cutting die with adjustable cutting edge angle.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A crankshaft forging edge trimming die with adjustable cutting edge angle includes a lower die base and an upper die trimming ring. The upper die trimming ring is provided with a cutting edge on its inner side. A notch is opened at the cutting edge of the upper die trimming ring facing the lower die base. A slide block is installed in the notch. The sliding direction of the slide block is perpendicular to the edge of the cutting edge at its position.

[0007] The slide block is rotatably hinged to one end of a cutting edge plate facing the lower mold base. The rotation axis of the cutting edge plate is perpendicular to the sliding direction of the slide block. The other end of the cutting edge plate is flush with the edge of the cutting edge ring of the upper mold. A drive assembly for driving the cutting edge plate to swing around the slide block is also provided in the notch.

[0008] The beneficial effects of this invention are: burrs are generated at the cutting edge position of the upper die cutting ring during cutting. The swinging cutting edge plate changes the cutting angle at this position, reducing the generation of cutting burrs, improving production efficiency and product quality. The slide moves the cutting edge plate, changing the length of the notch extending from the cutting edge plate, adjusting the gap between the cutting edge plate and the crankshaft blank, and avoiding cutting the crankshaft.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the slide block is rotatably hinged to the side facing the lower mold base with a first connecting plate. The first connecting plate is located on the side away from the cutting edge and is parallel to the cutting edge plate. The cutting edge plate and the first connecting plate are hinged together by a second connecting plate.

[0011] The first drive assembly includes a first threaded rod, which is installed inside the upper die cutting edge ring and threadedly connected to the upper die cutting edge ring. One end of the first threaded rod extends to the outside of the upper die cutting edge ring, and the other end passes through the side wall of the upper die cutting edge ring, extends into the notch, and is hinged to the first connecting plate.

[0012] The beneficial effects of adopting the above-mentioned further solution are: by forming a frame structure with the slide, the cutting edge plate, the first connecting plate and the second connecting plate, the structural strength of the cutting edge plate is improved; the thread structure of the first threaded rod has a self-locking function when it is not rotating, preventing the first threaded rod from being pulled when the cutting edge plate is under force.

[0013] Furthermore, a connecting block is fixed to the side of the first connecting plate away from the blade plate, and the connecting block has an oblong hole, the length direction of which is perpendicular to the rotation axis of the first connecting plate.

[0014] A first rotating shaft is rotatably mounted on one end of the first threaded rod facing the first connecting plate. The first rotating shaft is coaxial with the first threaded rod. A crossbar perpendicular to the first rotating shaft is fixedly connected to one end of the first rotating shaft facing the first connecting plate. The crossbar slides within the waist-shaped hole.

[0015] The beneficial effects of adopting the above-mentioned further solution are: the first threaded rod moves linearly, pushing the first connecting plate to swing, and the two have different motion trajectories. The waist-shaped hole and the crossbar ensure that the first threaded rod and the first connecting plate can transmit power without getting stuck.

[0016] Furthermore, a vertical plate is fixedly connected to the side of the slide away from the cutting edge. A second threaded rod is threadedly installed inside the upper die cutting edge ring. The second threaded rod is parallel to the axis of the first threaded rod. One end of the second threaded rod extends to the outside of the upper die cutting edge ring, and the other end passes through the side wall of the upper die cutting edge ring and extends into the notch and is fixedly connected to a ring platform. The ring platform rotates on the vertical plate.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the second threaded rod drives the slide to move, and the threaded structure has a self-locking function when it is not rotating, preventing the slide from sliding on its own when it is under force.

[0018] Furthermore, a third connecting plate is hinged between the slide and the second connecting plate, and the third connecting plate is parallel to the cutting edge plate.

[0019] The beneficial effect of adopting the above-mentioned further solution is that it further strengthens the stress-bearing structure of the cutting edge plate, enabling it to withstand greater forces.

[0020] Furthermore, the surface of the cutting edge plate is laser cladding strengthened.

[0021] The beneficial effects of adopting the above-mentioned further solutions are: laser cladding strengthening increases the high temperature resistance, corrosion resistance and wear resistance of the cutting edge, and extends its service life.

[0022] Furthermore, the upper die cutting ring is divided into a left die and a right die along the crankshaft axis;

[0023] Both ends of the left mold along its length are fixedly connected to a first connecting block, and both ends of the right mold along its length are fixedly connected to a second connecting block. Two third threaded rods are located on both sides of the left and right molds along their length, respectively. The two ends of the third threaded rods pass through the first and second connecting blocks and are threadedly connected to the first and second connecting blocks, respectively. The threads of the first and second connecting blocks rotate in opposite directions.

[0024] The left mold has grooves on several mating surfaces facing the right mold. A connecting blade block is slidably installed in each groove. The sliding direction of the connecting blade block is perpendicular to the mating surface. One end of the connecting blade block extends out of the groove and abuts against the mating surface of the right mold.

[0025] The beneficial effects of adopting the above-mentioned further solution are: adjusting the distance between the left and right dies to adjust the overall gap of the cutting edge and reduce burr generation; and connecting the cutting blocks to prevent gaps from appearing after the left and right dies are separated.

[0026] Furthermore, a fourth threaded rod corresponding to each groove is installed on the side wall of the left mold away from the right mold. One end of the fourth threaded rod passes through the side wall of the left mold and extends into the groove, and a second rotating shaft is rotatably installed thereon. The second rotating shaft is coaxial with the fourth threaded rod, and the end of the second rotating shaft away from the fourth threaded rod is fixedly connected to the connecting blade block.

[0027] The beneficial effect of adopting the above-mentioned further solution is that the fourth threaded rod drives the connecting blade block to extend or retract, and the threaded structure has a self-locking function when it is not rotating, preventing the connecting blade block from sliding on its own when it is under force.

[0028] Furthermore, cooling pipes are provided inside both the left and right molds.

[0029] The beneficial effects of adopting the above-mentioned further scheme are: the coolant flows in the left and right molds, improving the cooling efficiency and making the degree and position of cooling controllable.

[0030] The present invention also provides a method of use, comprising the following steps:

[0031] S1. Adjust the cutting edge plate so that it swings to the appropriate cutting edge angle;

[0032] S2. Then slide and adjust the position of the slide block at the notch;

[0033] S3. Trim the edges of the crankshaft forging blank;

[0034] S4. Repeat steps S1-S3 according to the quality of the cut edge until the product is qualified and free of burrs.

[0035] The beneficial effects of adopting the above scheme are: after adjusting the angle of the cutting edge plate, the position of the slide block, and the distance between the left and right dies, the generation of burrs on the crankshaft blank cutting edge is reduced, unnecessary processes are reduced, costs are lowered, and production efficiency is improved. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the cutting edge of the upper die cutting ring of the present invention;

[0037] Figure 2 This is a schematic diagram of the top surface of the upper die cutting edge ring of the present invention;

[0038] Figure 3 This is a schematic diagram of the slide block of the present invention;

[0039] Figure 4 This is a schematic diagram of the cutting edge plate of the present invention;

[0040] Figure 5 This is a schematic diagram of the blade angle adjustment of the present invention;

[0041] Figure 6 This is a schematic diagram of the groove of the present invention;

[0042] Figure 7 This is a schematic diagram of the connecting blade block of the present invention.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Upper die cutting edge ring; 2. Notch; 3. Slide block; 4. Cutting edge plate; 5. First connecting plate; 6. Second connecting plate; 7. First threaded rod; 8. Connecting block; 9. Waist-shaped hole; 10. First rotating shaft; 11. Crossbar; 12. Vertical plate; 13. Second threaded rod; 14. Ring platform; 15. Third connecting plate;

[0045] 101. Left mold; 102. Right mold; 103. First connecting block; 104. Second connecting block; 105. Third threaded rod; 106. Groove; 107. Connecting blade block; 108. Fourth threaded rod; 109. Second rotating shaft. Detailed Implementation

[0046] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0047] Example 1

[0048] like Figures 1 to 3 As shown, a crankshaft forging edge trimming die with adjustable cutting edge angle includes a lower die base and an upper die trimming ring 1. The inner side of the upper die trimming ring 1 is provided with a cutting edge. The upper die trimming ring 1 has a notch 2 at the cutting edge facing the lower die base. A slide block 3 is installed in the notch 2. The sliding direction of the slide block 3 is perpendicular to the edge of the cutting edge at its position.

[0049] The slide block 3 is rotatably hinged to one end of the cutting edge plate 4 facing the lower mold base. The rotation axis of the cutting edge plate 4 is perpendicular to the sliding direction of the slide block 3. The other end of the cutting edge plate 4 is flush with the cutting edge of the upper mold cutting ring 1. The notch 2 is also provided with a driving component that drives the cutting edge plate 4 to swing around the slide block 3.

[0050] The beneficial effects of this embodiment are: burrs are generated at the edge position of the upper die cutting ring 1 during cutting. The swinging blade angle plate 4 changes the blade angle at this position, reducing the generation of burrs and improving production efficiency and product quality. The slide 3 drives the blade angle plate 4 to move, changing the length of the blade angle plate 4 extending out of the notch 2, adjusting the gap between the blade angle plate 4 and the crankshaft blank, and avoiding cutting the crankshaft.

[0051] Specifically, the forged blank is formed into a crankshaft through multiple hot forging processes. However, after the final forging, a ring of flash will form at the parting surface, requiring the crankshaft to be trimmed using a trimming die. After trimming, small burrs will be generated at the parting surface of the crankshaft forging, so an additional burr removal process is required.

[0052] After using different clearances and cutting edges for crankshaft edge trimming, the length and number of burrs on the die-cut surface of the crankshaft varied. After multiple comparisons, it was found that different clearances and cutting edges had a significant impact on the edge trimming die, and the longer the burr length, the more burrs there were.

[0053] In actual production, some specific locations have the most burrs, so they are changed to notches 2. The slide 3 and the cutting edge plate 4 can slide in the notches 2. First, the swing of the cutting edge plate 4 is adjusted to change the cutting edge angle, which facilitates crankshaft cutting, reduces the generation of cutting edge burrs, and improves production efficiency and product quality.

[0054] When the cutting edge plate 4 swings, it may extend too far beyond the notch 2 and easily cut the crankshaft. Therefore, the slide 3 is adjusted. The slide 3 drives the cutting edge plate 4 to move backward, adjusting the gap between the cutting edge plate 4 and the crankshaft blank, so as to prevent the cutting edge plate 4 from cutting the crankshaft body.

[0055] Example 2

[0056] like Figures 3 to 5 As shown, preferably, based on embodiment 1, the slide block 3 is also rotatably hinged to the side facing the lower mold base with a first connecting plate 5. The first connecting plate 5 is located on the side away from the cutting edge and is parallel to the cutting edge plate 4. The cutting edge plate 4 and the first connecting plate 5 are hinged together by a second connecting plate 6.

[0057] The first drive assembly includes a first threaded rod 7, which is installed inside the upper die cutting edge ring 1 and threadedly connected to the upper die cutting edge ring 1. One end of the first threaded rod 7 extends to the outside of the upper die cutting edge ring 1, and the other end passes through the side wall of the upper die cutting edge ring 1, extends into the notch 2, and is hinged to the first connecting plate 5.

[0058] The beneficial effects of the preferred solution in the above embodiments are: the frame structure formed by the slide 3, the cutting edge plate 4, the first connecting plate 5 and the second connecting plate 6 improves the structural strength of the cutting edge plate 4; the thread structure of the first threaded rod 7 has a self-locking function when it is not rotating, preventing the first threaded rod 7 from being pulled when the cutting edge plate 4 is under force.

[0059] Specifically, the slide 3, the cutting edge plate 4, the first connecting plate 5 and the second connecting plate 6 form a frame structure. When the first threaded rod 7 drives the first connecting plate 5 to swing, the cutting edge plate 4 on the other side swings synchronously to achieve cutting edge adjustment.

[0060] When the edge of the cutting edge plate 4 participates in the cutting of the forging blank, the reaction force will cause the frame structure to swing. The first threaded rod 7 pulls the first connecting plate 5. The thread of the first threaded rod 7 has self-locking properties and will not move under the reaction force, thus ensuring the stability of the cutting edge plate 4.

[0061] Based on the above embodiments, the first threaded rod 7 can also be replaced by an electrically adjustable mechanical component such as an electric telescopic rod.

[0062] Preferably, a connecting block 8 is fixedly connected to the side of the first connecting plate 5 away from the blade plate 4, and the connecting block 8 has an oblong hole 9, the length direction of which is perpendicular to the rotation axis of the first connecting plate 5.

[0063] The first threaded rod 7 is rotatably mounted with a first rotating shaft 10 at one end facing the first connecting plate 5. The first rotating shaft 10 is coaxial with the first threaded rod 7. A crossbar 11 perpendicular to the first rotating shaft 10 is fixedly connected to one end of the first rotating shaft 10 facing the first connecting plate 5. The crossbar 11 is slidably located in the waist-shaped hole 9.

[0064] The beneficial effects of the preferred solution in the above embodiments are: the first threaded rod 7 moves linearly, pushing the first connecting plate 5 to swing, and the two have different movement trajectories. The waist-shaped hole 9 and the crossbar 11 ensure that the first threaded rod 7 and the first connecting plate 5 can transmit power without getting stuck.

[0065] Specifically, because of its threaded structure, the first threaded rod 7 can move forward or backward when rotating inside the upper die cutting ring 1, which will drive the first rotating shaft 10 to move. However, the first rotating shaft 10 only has linear motion and no rotational motion. The first rotating shaft 10 drives the crossbar 11, and the crossbar 11 drives the first connecting plate 5 to swing. Because the swing trajectory of the first connecting plate 5 is an arc, the crossbar 11 slides in the waist-shaped hole 9 to avoid jamming.

[0066] Preferably, a vertical plate 12 is fixedly connected to the side of the slide block 3 away from the cutting edge. A second threaded rod 13 is installed in the upper die cutting edge ring 1 by thread. The second threaded rod 13 is parallel to the axis of the first threaded rod 7. One end of the second threaded rod 13 extends to the outside of the upper die cutting edge ring 1, and the other end passes through the side wall of the upper die cutting edge ring 1 and extends into the notch 2 and is fixedly connected to an annular platform 14. The annular platform 14 is rotatably located on the vertical plate 12.

[0067] The beneficial effect of adopting the preferred solution in the above embodiments is that the second threaded rod 13 drives the slide 3 to move, and the threaded structure has a self-locking function when it is not rotating, preventing the slide 3 from sliding on its own when it is under force.

[0068] like Figure 5 As shown, the upright plate 12 is also provided with a clearance hole for the first threaded rod 7 to pass through;

[0069] Specifically, because of its threaded structure, the second threaded rod 13 can move forward or backward when it rotates inside the upper die cutting ring 1. When the second threaded rod 13 rotates, the ring platform 14 rotates on the vertical plate 12. The second threaded rod 13 pushes the vertical plate 12 forward through the ring platform 14, and the vertical plate 12 drives the slide block 3 to move back and forth. The threaded structure also has a self-locking function to prevent the slide block 3 from sliding on its own when it is under force.

[0070] By alternately adjusting the first threaded rod 7 and the second threaded rod 13, the angle swing of the cutting edge plate 4 and the length of the protrusion notch 2 can be achieved.

[0071] Based on the above embodiments, the second threaded rod 13 can also be replaced by an electrically adjustable mechanical component such as an electric telescopic rod.

[0072] Preferably, a third connecting plate 15 is hinged between the slide block 3 and the second connecting plate 6, and the third connecting plate 15 is parallel to the blade plate 4.

[0073] The beneficial effect of adopting the preferred solution in the above embodiments is that it further strengthens the stress-bearing structure of the cutting edge plate 4, enabling it to withstand greater forces.

[0074] Example 3

[0075] like Figure 4 As shown, preferably, based on Embodiments 1-2, the surface of the blade plate 4 is laser cladding strengthened.

[0076] The beneficial effects of the preferred solution in the above embodiments are: laser cladding strengthening increases the high temperature resistance, corrosion resistance and wear resistance of the cutting edge, and extends the service life.

[0077] Specifically, laser cladding strengthening technology for crankshaft edge trimming dies is an important surface treatment technology used to improve the wear resistance, corrosion resistance, and service life of crankshaft edge trimming dies. During the laser cladding process, the cladding material and the substrate material melt and solidify rapidly under the action of a high-energy laser beam, forming a cladding layer that is metallurgically bonded to the substrate.

[0078] Common laser cladding materials include nickel-based alloys, cobalt-based alloys, and iron-based alloys. This solution uses nickel-based alloys.

[0079] Example 4

[0080] like Figures 6 to 7 As shown, preferably, based on embodiments 1-3, the upper die cutting ring 1 is divided into a left die 101 and a right die 102 along the crankshaft axis;

[0081] Both ends of the left mold 101 along its length are fixedly connected to a first connecting block 103, and both ends of the right mold 102 along its length are fixedly connected to a second connecting block 104. Two third threaded rods 105 are located on both sides of the left mold 101 and the right mold 102 along their length, respectively. The two ends of the third threaded rods 105 pass through the first connecting block 103 and the second connecting block 104, respectively, and are threadedly connected to the first connecting block 103 and the second connecting block 104. The threads of the first connecting block 103 and the second connecting block 104 have opposite directions of rotation.

[0082] The left mold 101 has grooves 106 on several mating surfaces facing the right mold 102. A connecting blade block 107 is slidably installed in each groove 106. The sliding direction of the connecting blade block 107 is perpendicular to the mating surface. One end of the connecting blade block 107 extends out of the groove 106 and abuts against the mating surface of the right mold 102.

[0083] The beneficial effects of the preferred solution in the above embodiments are: adjusting the distance between the left mold 101 and the right mold 102 to adjust the overall gap of the cutting edge and reduce burr generation; and connecting the cutting block 107 to prevent gaps from appearing after the left mold 101 and the right mold 102 are separated.

[0084] Specifically, in actual production, adjusting the overall clearance also has a great impact on reducing burrs on crankshaft blanks. Rotating the third threaded rod 105 causes the first connecting block 103 and the second connecting block 104 to move away from or towards each other, thereby moving the left mold 101 and the right mold 102 away from or towards each other.

[0085] When the gap between the mating surfaces of the left mold 101 and the right mold 102 narrows, the connecting blade block 107 is hidden in the groove 106, and the mating surfaces of the left mold 101 and the right mold 102 can directly abut.

[0086] When the gap between the mating surfaces of the left mold 101 and the right mold 102 increases, one end of the connecting blade block 107 extends out of the groove 106 and abuts against the mating surface of the right mold 102, ensuring the integrity of the circumferential cutting edge of the upper mold cutting ring 1 and enabling normal crankshaft cutting.

[0087] In addition, when the connecting blade block 107 extends, there is a step difference between the cutting edge surface of the connecting blade block 107 and the original cutting edge surfaces of the left mold 101 and the right mold 102. After trimming, small steps may appear on the forged crankshaft body, which can be removed by subsequent machining.

[0088] Preferably, a fourth threaded rod 108 corresponding to the groove 106 is installed on the side wall of the left mold 101 away from the right mold 102. One end of the fourth threaded rod 108 passes through the side wall of the left mold 101 and extends into the groove 106, and a second rotating shaft 109 is rotatably installed thereon. The second rotating shaft 109 is coaxial with the fourth threaded rod 108, and one end of the second rotating shaft 109 away from the fourth threaded rod 108 is fixedly connected to the connecting blade block 107.

[0089] The beneficial effect of adopting the preferred solution in the above embodiments is that the fourth threaded rod 108 drives the connecting blade block 107 to extend or retract, and the threaded structure has a self-locking function when it is not rotating, preventing the connecting blade block 107 from sliding on its own when it is under force.

[0090] Specifically, due to its threaded structure, the fourth threaded rod 108 can move forward or backward when rotating within the left mold 101. The fourth threaded rod 108 drives the second rotating shaft 109 to move forward or backward. The second rotating shaft 109 only has linear motion and does not rotate. The second rotating shaft 109 drives the connecting blade block 107 to extend or retract, thereby achieving adjustment.

[0091] Example 5

[0092] like Figures 1 to 2 As shown, preferably, based on embodiments 1-4, both the left mold 101 and the right mold 102 are provided with cooling pipes.

[0093] The beneficial effects of adopting the preferred solution in the above embodiments are: the coolant flows in the left mold 101 and the right mold 102, improving the cooling efficiency and making the cooling degree and position controllable.

[0094] Specifically, when cutting the crankshaft, the mold needs to be cooled. The existing cooling method is to manually spray water and cool the mold based on experience. The degree and location of cooling are uncontrollable and uncertain.

[0095] This embodiment uses a built-in cooling pipe in the mold. The inlet and outlet of the cooling pipe are located on the side wall of the mold and connected to an external pump body, which facilitates the flow of coolant and makes the cooling effect more stable.

[0096] Example 6

[0097] One method of use includes the following steps:

[0098] S1. Adjust the cutting edge plate so that it swings to the appropriate cutting edge angle;

[0099] S2. Adjust the position of the sliding block at the notch;

[0100] S3. Trim the edges of the crankshaft forging blank;

[0101] S4. Repeat steps S1-S3 according to the quality of the cut edge until the product is qualified and free of burrs.

[0102] The beneficial effects of adopting the preferred solution in the above embodiments are: after adjusting the angle of the cutting edge plate and the position of the slide, the generation of burrs on the cutting edge of the crankshaft blank can be reduced, unnecessary processes can be reduced, costs can be reduced, and production efficiency can be improved.

[0103] Specifically, in actual production, the angle of the cutting edge plate and the position of the slide are adjusted first, and then trial production is carried out. Then, according to the burr situation of the crankshaft, the various angle and position parameters are adjusted in a targeted manner, and trial production is carried out again until the product is qualified and formal production begins.

[0104] Based on the above embodiments, the following steps can also be adopted:

[0105] S1. Adjust the cutting edge plate so that it swings to the appropriate cutting edge angle;

[0106] S2. Adjust the position of the sliding block at the notch;

[0107] S3. Adjust the distance between the left and right molds;

[0108] S4. Adjust the distance of the connecting blade block extending out of the groove according to the distance between the left and right molds;

[0109] S5. Trim the edges of the crankshaft forging blank;

[0110] S6. Repeat steps S1-S5 according to the quality of the cut edge until the product is qualified and free of burrs.

[0111] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0112] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0113] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0114] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0115] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0116] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A crankshaft forging edge trimming die with adjustable cutting edge angle, comprising a lower die base and an upper die trimming ring (1), wherein the inner side of the upper die trimming ring (1) is provided with a cutting edge, characterized in that, The upper die cutting edge ring (1) has a notch (2) at the cutting edge facing the lower die base, and a slide (3) is installed in the notch (2). The sliding direction of the slide (3) is perpendicular to the edge of the cutting edge at its location. The slide (3) is rotatably hinged to one end of the cutting edge plate (4) facing the lower mold base. The rotation axis of the cutting edge plate (4) is perpendicular to the sliding direction of the slide (3). The other end of the cutting edge plate (4) is flush with the edge of the cutting edge ring (1) of the upper mold. The notch (2) is also provided with a driving component that drives the cutting edge plate (4) to swing around the slide (3). The slide block (3) is also rotatably hinged to a first connecting plate (5) on the side facing the lower mold base. The first connecting plate (5) is located on the side away from the cutting edge and is parallel to the cutting edge plate (4). The cutting edge plate (4) and the first connecting plate (5) are hinged together by a second connecting plate (6). The drive assembly includes a first threaded rod (7), which is installed inside the upper die cutting ring (1) and threadedly connected to the upper die cutting ring (1). One end of the first threaded rod (7) extends to the outside of the upper die cutting ring (1), and the other end passes through the side wall of the upper die cutting ring (1) and extends into the notch (2) and is hinged to the first connecting plate (5).

2. The crankshaft forging edge-cutting die with adjustable cutting edge angle according to claim 1, characterized in that, A connecting block (8) is fixedly connected to the side of the first connecting plate (5) away from the blade plate (4). The connecting block (8) has an oblong hole (9) and the length direction of the oblong hole (9) is perpendicular to the rotation axis of the first connecting plate (5). The first threaded rod (7) is rotatably mounted with a first rotating shaft (10) at one end facing the first connecting plate (5). The first rotating shaft (10) is coaxial with the first threaded rod (7). A crossbar (11) perpendicular to the first rotating shaft (10) is fixedly connected to one end of the first rotating shaft (10) facing the first connecting plate (5). The crossbar (11) slides within the waist-shaped hole (9).

3. The crankshaft forging edge-cutting die with adjustable cutting edge angle according to claim 2, characterized in that, A vertical plate (12) is fixedly connected to the side of the slide block (3) away from the cutting edge. A second threaded rod (13) is installed inside the upper die cutting ring (1) by thread. The second threaded rod (13) is parallel to the axis of the first threaded rod (7). One end of the second threaded rod (13) extends to the outside of the upper die cutting ring (1), and the other end passes through the side wall of the upper die cutting ring (1) and extends into the notch (2) and is fixedly connected to an annular platform (14). The annular platform (14) is rotatably located on the vertical plate (12).

4. The crankshaft forging edge-cutting die with adjustable cutting edge angle according to claim 3, characterized in that, A third connecting plate (15) is also hinged between the slide (3) and the second connecting plate (6), and the third connecting plate (15) is parallel to the cutting edge plate (4).

5. A crankshaft forging edge-cutting die with adjustable cutting edge angle according to any one of claims 1-4, characterized in that, The surface of the blade plate (4) is laser cladding strengthened.

6. The crankshaft forging edge-cutting die with adjustable cutting edge angle according to claim 1, characterized in that, The upper die cutting ring (1) is divided into a left die (101) and a right die (102) along the crankshaft axis; Both ends of the left mold (101) are fixedly connected to a first connecting block (103) along its length, and both ends of the right mold (102) are fixedly connected to a second connecting block (104) along its length. Two third threaded rods (105) are located on both sides of the left mold (101) and the right mold (102) along their length, respectively. The two ends of the third threaded rods (105) pass through the first connecting block (103) and the second connecting block (104) respectively and are threadedly connected to the first connecting block (103) and the second connecting block (104). The threads of the first connecting block (103) and the second connecting block (104) have opposite directions of rotation. The left mold (101) has grooves (106) on several mating surfaces facing the right mold (102). A connecting blade block (107) is slidably installed in each groove (106). The sliding direction of the connecting blade block (107) is perpendicular to the mating surface. One end of the connecting blade block (107) extends out of the groove (106) and abuts against the mating surface of the right mold (102).

7. The crankshaft forging edge-cutting die with adjustable cutting edge angle according to claim 6, characterized in that, A fourth threaded rod (108) corresponding to the groove (106) is installed on the side wall of the left mold (101) away from the right mold (102). One end of the fourth threaded rod (108) passes through the side wall of the left mold (101) and extends into the groove (106), and a second rotating shaft (109) is rotatably installed thereon. The second rotating shaft (109) is coaxial with the fourth threaded rod (108), and the end of the second rotating shaft (109) away from the fourth threaded rod (108) is fixedly connected to the connecting blade block (107).

8. A crankshaft forging edge-cutting die with adjustable cutting edge angle according to claim 6 or 7, characterized in that, Cooling pipes are provided inside both the left mold (101) and the right mold (102).

9. A method of using a crankshaft forging edge-cutting die with adjustable cutting edge angle as described in any one of claims 1-8, characterized in that, It includes the following steps: S1. Adjust the cutting edge plate so that it swings to the appropriate cutting edge angle; S2. Adjust the position of the sliding block at the notch; S3. Trim the edges of the crankshaft forging blank; S4. Repeat steps S1-S3 according to the quality of the cut edge until the product is qualified and free of burrs.

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