Cut-in depth adjusting detection tool for crankshaft forge piece during edge cutting
By designing a cutting depth adjustment test tool for crankshaft forging, the problem of difficult to accurately judge the cutting depth during the cutting process of crankshaft forging is solved, and the precise adjustment of the cutting mold is achieved, avoiding damage and dimensional deviation of crankshaft forging.
Patent Information
- Application Number
- CN202421811779.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-30
AI Technical Summary
During the cutting process of crankshaft forging, the prior art cannot accurately determine the cutting depth of the mold on the cutting edge, resulting in insufficient cutting edges or collision between the cutting edge mold and the crankshaft forging, causing damage to the surface of the crankshaft forging and dimensional deviation, and scrapped in severe cases.
Design a tool for adjusting the cutting depth of the crankshaft forgings when cutting edges, including intermediate rods, contact heads, screw frames, rollers and sliders. By adjusting the blocks and threads, it can adapt to different cavity depths to ensure the accurate cutting depth of the mold on the cutting edge.
It realizes accurate calculation of the cutting depth during the crankshaft design stage, and marks the stroke scale of the cutting edges on the cutting edges before production to avoid insufficient cutting edges or mold collisions, ensures the integrity and dimensional accuracy of the crankshaft forgings, and reduces waste rate.
Smart Images
Figure CN222873263U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of machinery, in particular to a device for adjusting the cutting depth of a trimming die. Background Art
[0002] The trimming of crankshaft forgings is to remove the excess edge material around the parting surface of the forging after final forging. The parting surfaces of most crankshaft forgings are not on the same horizontal plane, and the vertical heights of the flash at different positions are different. During stamping, if the cutting depth of the trimming die is not enough, the local flash may not be completely cut off, and the crankshaft forging will fall and collide with the trimming die locally, causing the surface of the crankshaft forging to be bumped, damaged and bent, and deviations in straightness, indexing and other dimensions. In severe cases, the crankshaft forging will be scrapped and cannot be used.
[0003] At present, it is impossible to accurately determine the cutting depth of the trimming upper die before crankshaft production. It can only be adjusted by gradually adjusting the drop height of the press during the production process. As a result, crankshaft forgings are easily scrapped. Utility Model Content
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a tool for measuring the depth of the upper trimming die into the lower trimming die; the specific technical solution is as follows:
[0005] A gauge for adjusting the cutting depth when trimming a crankshaft forging comprises an intermediate rod, a contact head is arranged in front of the intermediate position of the intermediate rod; a screw rack is fixed at the intermediate position of the intermediate rod; a groove is arranged on the screw rack, coaxial through holes are arranged at both ends of the groove, a roller is arranged at the intermediate position of the screw, and the threads on the screw on both sides of the roller are rotated in opposite directions; the screw passes through the through holes at both ends of the bolt rack and is connected with the screw holes of a left slider and a right slider, the left slider and the right slider are both provided with guide holes, and the left slider and the right slider are sleeved on the two ends of the intermediate rod through the guide holes; the front ends of the left slider, the right slider and the contact head are in the same height.
[0006] In order to adapt to the depths of different cavities, adjustment blocks are arranged at the front ends of the left slider, the right slider and the contact head, and the adjustment blocks are connected to the middle rod through threads.
[0007] The groove is provided with a shaft cover, and the shaft cover is connected to the screw rod frame through bolts.
[0008] In order to ensure the radial positioning of the screw, the matching position between the screw and the groove through hole is a smooth surface.
[0009] The central planes of the roller, the contact head and the screw rod frame are in the same plane; the left slider and the right slider are symmetrically arranged at two ends of the central plane.
[0010] The utility model has the advantages that the cutting depth that satisfies the complete trimming of the crankshaft is calculated and determined in the crankshaft design stage, and the stroke scale is marked on the trimming upper die before production to adjust the descending height of the trimming upper die during production, so as to prevent the trimming upper die from having insufficient cutting depth during stamping, resulting in the partial flash not being completely cut off, the crankshaft forging colliding with the trimming die, causing the surface of the crankshaft forging to be bumped and damaged, and the straightness, indexing and other dimensions to deviate, and in serious cases, the crankshaft forging is scrapped and cannot be used. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the structure of the inspection tool of the utility model;
[0012] Figure 2 for Figure 1 Bottom view of
[0013] Figure 3 It is a schematic diagram of the crankshaft structure;
[0014] Figure 4 for Figure 3 An enlarged schematic diagram of the A position;
[0015] Figure 5 The schematic diagram of the position of the marking line of the trimming upper die;
[0016] Figure 6 It is a schematic diagram of the coordination between the trimming upper die and the trimming lower die. DETAILED DESCRIPTION
[0017] The present invention is described in detail below with reference to the accompanying drawings. The structure of the inspection tool is shown in the figure, and includes an intermediate rod 1, the front of the intermediate position of the intermediate rod ( Figure 1 The contact head 7 is arranged above the middle position of the middle rod ( Figure 1 A screw frame 2 is fixed at the bottom of the middle rod; a groove 21 is provided on the screw frame 2, and coaxial through holes 22 are provided on both sides of the groove; a roller 31 is provided in the middle of the screw 3, and the threads on the screws on both sides of the roller are rotated in opposite directions; the screw 3 passes through the through holes 22 at both ends and is connected with the screw holes of the left slider 5 and the right slider 6, and the left slider and the right slider are both provided with guide holes, and the left slider 5 and the right slider 6 are sleeved on the two ends of the middle rod through the guide holes; the front end (referring to Figure 1 The upper end of the ) is highly consistent.
[0018] In order to adapt to the depths of different cavities, adjustment blocks are arranged at the front ends of the left slider, the right slider and the contact head, and the adjustment blocks are connected to the body through threads.
[0019] A shaft cover 4 is disposed below the groove 21 , and the shaft cover 4 is connected to the screw frame 2 via bolts 13 ; the screw frame 2 is fixed to the middle rod 1 via bolts 13 .
[0020] In order to ensure the radial positioning of the screw 3, the matching position between the screw and the through hole 22 of the groove is a smooth surface.
[0021] The center planes of the roller 31, the contact head 7 and the screw frame 2 are the same center plane; the left slider 5 and the right slider 6 are symmetrically arranged at the two ends of the center plane.
[0022] like Figure 3 and Figure 4 As shown, the crankshaft forging 8 is designed with a bridge structure 9 at the parting part of the die. After the final forging process, the crankshaft forging 8 has a circle of excess edge material left at the bridge structure 9. Usually, the bridge structure 9 is not on the same horizontal plane, and the vertical heights of the excess edge material generated at different positions are different. For example, the minimum cutting depth of the inclined surface B is H, and the minimum cutting depth of the horizontal surface C is h. Obviously, H>h; therefore, the minimum cutting depth of the upper cutting die into the lower cutting die during trimming should be greater than H;
[0023] The minimum cutting depth of the inclined surface is H, and the minimum cutting depth of the horizontal surface is h, both of which can be calculated through three-dimensional modeling projection based on the design drawings of the crankshaft.
[0024] like Figure 5 As shown, the inspection position for this inspection fixture to detect the cutting depth of the crankshaft trimming upper die 10 into the trimming lower die 11 is the shaft diameter part. The shaft diameter part of the crankshaft trimming upper die 10 is a circular structure. The inspection method for the distance from the center of the parting surface at the shaft diameter part of the crankshaft forging to the deepest part of the cavity is:
[0025] By rotating the roller of the screw 3, the left slider 5 and the right slider 6 are adjusted to the corresponding width of the part to be inspected, that is, the left slider and the right slider are both close to the radial outer end of the trimming upper die. After the tip of the contact head 7 is in contact with the trimming upper die 10, since the contact head, the upper ends of the left slider 5 and the right slider 6 are in the same plane, the upper end plane of the left slider 5 and the right slider 6 corresponds to the deepest position of the cavity of the trimming upper die at the measured shaft diameter position, that is, the shaft diameter radius R, and a horizontal marking line L2 is made at the corresponding plane position; the difference I between the shaft diameter radius R and the minimum cutting depth H of the forging is the lowest position of the trimming upper die that satisfies the complete trimming of this forging, and the distance I is measured downward from the plane L2 to depict the first horizontal marking line L1; when performing the trimming process, the closing height of the trimming press is adjusted so that the position L3 where the trimming upper die penetrates into the trimming lower die is between the first horizontal marking line L1 and the second horizontal marking line L2, which can meet the trimming requirements of the crankshaft forging. The method of the utility model does not need to install the crankshaft between the trimming upper die and the trimming lower die for trial die to determine the depth of the trimming upper die pressed into the cutting surface lower die; it not only avoids damage to the crankshaft during the trial die, but also has high precision and simple operation.
Claims
1. A gauge for adjusting the cutting depth during trimming of a crankshaft forging, characterized in that: It includes an intermediate rod, a contact head is arranged in front of the intermediate position of the intermediate rod; a screw rack is fixed at the rear of the intermediate position of the intermediate rod; the screw rack is provided with a groove, coaxial through holes are arranged at both ends of the groove, a roller is arranged at the middle position of the screw, and the threads on the screws on both sides of the roller are rotated in opposite directions; the screw passes through the through holes at both ends and is connected with the screw holes of the left slider and the right slider, the left slider and the right slider are both provided with guide holes, and the left slider and the right slider are sleeved on the two ends of the intermediate rod through the guide holes; the front ends of the left slider, the right slider and the contact head are in the same height.
2. The inspection tool according to claim 1, characterized in that: The front ends of the left slider, the right slider and the contact head are provided with adjustment blocks, and the adjustment blocks are connected to the body through threads.
3. The gauge according to claim 1, characterized in that: A shaft cover is arranged above the groove, and the shaft cover is connected to the screw rod frame through bolts.
4. The gauge according to claim 1, characterized in that: The matching position between the screw rod and the groove through hole is a smooth surface.
5. The gauge according to claim 1, characterized in that: The central planes of the roller, the contact head and the screw rod frame are the same central plane; the left slider and the right slider are symmetrically arranged at the two ends of the central plane.