Motorcycle crankshaft crank forging die frame and adjusting device

Abstract

The utility model relates to the technical field of motorcycle crankshaft crank machining, in particular to a motorcycle crankshaft crank forging die frame and an adjusting device. Comprising a lower die frame and an auxiliary assembly, the auxiliary assembly comprises an upper die frame, a lower die cushion block, a lower die pressing ring, an upper die cushion block, an upper die pressing ring, a pressing plate and a guide component, when a die is installed, a lower die core and the lower die pressing ring are installed, a lower die frame pressing plate bolt is screwed to fix the lower die core, a die positioning frame is installed, the lower die core is sleeved with a lower end hole, and an upper die core and the upper die pressing ring are installed; pressing plate bolts on the upper die frame are screwed, the upper die core is initially fixed, a press is started to enable the upper die frame to move downwards, the upper die frame slowly makes contact with the interior of the die positioning frame, an upper die pressing ring hole is sleeved with the outer circle of an upper spigot of the die positioning frame, the upper die frame continues to move downwards, finally, an upper die pressing ring and a lower die pressing ring are completely attached to the end face of the die positioning frame, and finally all the pressing plate bolts are locked. Therefore, the problems that dislocation of the upper die and the lower die is difficult to adjust and machining and using are not facilitated when an existing clamp die frame is used and remodeled are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle crankshaft crank processing, in particular to a motorcycle crankshaft crank forging die frame and an adjusting device. Background Art

[0002] The motorcycle crankshaft is a core component in a motorcycle engine. Its primary function is to convert the reciprocating motion of the pistons into rotational motion, which is then output through the gear at one end of the crankshaft to drive the motorcycle. The crankshaft is a modular design, consisting of a left and right crankshaft halves pressed together, along with a crankpin. Ball bearings are mounted on the main journals of the two crankshaft halves, supporting the crankshaft in the crankcase. The flywheel, magneto, and clutch drive gear are mounted at each end of the crankshaft. The connecting rod is a one-piece structure with a circular end housing a needle bearing and a crankpin, forming the crank-connecting rod assembly. When installing the piston rings in a two-stroke engine, ensure that the opening of the piston ring aligns with the locating pin in the piston ring groove to prevent the piston ring from rotating in the groove, causing air leakage and scratching the intake and exhaust ports on the cylinder liner.

[0003] At present, most motorcycle crankshaft crank blanks are processed by forging, but the existing fixture die frame has the problem of difficult adjustment of the upper and lower die misalignment during mold change, which is not conducive to processing and use. Utility Model Content

[0004] The utility model aims to provide a motorcycle crankshaft forging die frame and an adjusting device to solve the problem that the existing fixture die frame has the problem that the upper and lower dies are misaligned and difficult to adjust when changing the mold, which is not conducive to processing and use.

[0005] To achieve the above-mentioned purpose, the utility model provides a motorcycle crankshaft crank forging die frame, including a lower die frame and an auxiliary component;

[0006] The auxiliary components include an upper mold frame, a lower mold pad, a lower mold pressing ring, an upper mold pad, an upper mold pressing ring, a pressure plate and a guide member. The upper mold frame is located above the lower mold frame, the lower mold pad is arranged in the lower mold frame, the lower mold pressing ring is detachably connected to the lower mold frame, and is located on the side of the lower mold frame close to the upper mold frame, the upper mold pad is arranged in the upper mold frame, the upper mold pressing ring is detachably connected to the upper mold frame, and is located on the side of the upper mold frame close to the lower mold frame, the pressure plates are respectively arranged on one side of the upper mold frame and the lower mold frame, and the guide member is arranged on the side of the lower mold frame close to the upper mold frame.

[0007] Wherein, the guide member includes a guide column and a guide sleeve, the guide column is fixedly connected to the lower mold frame and is located on the side of the lower mold frame close to the upper mold frame; the guide sleeve is fixedly connected to the upper mold frame and is slidably connected to the guide column, and is located on the side of the upper mold frame close to the guide column.

[0008] Wherein, the outer surface of the guide column is provided with a wear-resistant layer.

[0009] Wherein, the inner surface of the guide sleeve is provided with a wear-resistant layer.

[0010] Wherein, the guide sleeve is formed by integrally forming and stamping through a mold.

[0011] Among them, a motorcycle crankshaft crank forging die frame adjustment device is used to adjust the motorcycle crankshaft crank forging die frame.

[0012] The utility model discloses a forging die frame for a crankshaft of a motorcycle. When in use, the upper die frame and the lower die frame are first installed on the pressure head and the lower workbench of the press respectively. When installing, it is necessary to ensure that the upper die frame and the lower die frame are aligned, that is, the guide components cooperate flexibly. When installing the mold, the lower die core is first installed, and then the lower die pressing ring is installed. Then, the upper pressure plate bolts of the lower die frame are slightly tightened to preliminarily fix the lower die core. The mold positioning frame is installed, and the lower end hole is sleeved outside the lower die core. The upper die core and the upper die pressing ring are installed. The upper pressure plate bolts of the upper die frame are screwed to preliminarily fix the upper die core. The press is started so that the pressure head slider is brought Move the upper mold frame downward and slowly contact the mold positioning frame. During the process, make the upper mold pressing ring hole enter the outer circle of the upper stop of the mold positioning frame, continue to move the upper mold frame downward, and finally make the upper mold pressing ring, lower mold pressing ring and the end face of the mold positioning frame completely fit together. Observe that all parts fit together well, and finally tighten the pressure plate bolts at all places to ensure that the mold is installed and fixed. Then you can preheat the mold core and process the product. Through this structure, the mold installation and positioning can be better carried out, thereby solving the problem that the upper and lower molds of the existing fixture mold frame are misaligned and difficult to adjust when changing the mold, which is not conducive to processing and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0014] Figure 1 The utility model is a schematic diagram of the mold installation of the motorcycle crankshaft crank forging die frame.

[0015] Figure 2 The utility model is a schematic diagram of the working state of the forging die frame of the crankshaft of a motorcycle.

[0016] Figure 3 It is a structural schematic diagram of the lower mold pressing ring of the utility model.

[0017] In the figure: 1-lower die frame, 2-lower die pad, 3-lower die ring, 4-guide column, 5-guide sleeve, 6-upper die ring, 7-upper die frame, 8-upper die pad, 9-pressing plate. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] like Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the mold installation of the motorcycle crankshaft forging die set. Figure 2 This is a schematic diagram of the working state of the motorcycle crankshaft forging die set. Figure 3 This is a schematic diagram of the structure of the lower die ring 3. The present invention provides a forging die set for a motorcycle crankshaft, comprising a lower die set 1 and auxiliary components, including an upper die set 7, a lower die pad 2, a lower die ring 3, an upper die pad 8, an upper die ring 6, a pressure plate 9, and a guide member, comprising a guide post 4 and a guide sleeve 5. This solution addresses the problem of existing fixture die sets being difficult to adjust due to misalignment between the upper and lower dies during die changes, hindering machining. It is understood that this solution facilitates stable installation and adjustment of forging dies.

[0020] In this embodiment, the lower mold frame 1 is fixed to the lower workbench of the equipment by positioning pins and bolts.

[0021] Among them, the upper mold frame 7 is located above the lower mold frame 1, the lower mold pad 2 is arranged in the lower mold frame 1, the lower mold pressing ring 3 is detachably connected to the lower mold frame 1, and is located on the side of the lower mold frame 1 close to the upper mold frame 7, the upper mold pad 8 is arranged in the upper mold frame 7, the upper mold pressing ring 6 is detachably connected to the upper mold frame 7, and is located on the side of the upper mold frame 7 close to the lower mold frame 1, the pressing plate 9 is respectively arranged on the side of the upper mold frame 7 and the lower mold frame 1, and the guide member is arranged on the side of the lower mold frame 1 close to the upper mold frame 7. The upper mold frame 7 can be installed on the equipment pressure head by means of locating pins and bolts, the lower mold pad 2 is fixed to the bottom of the mold mounting cavity of the lower mold frame 1 by means of locating pins and bolts, the locating pins and bolts are both countersunk to facilitate the installation and support of the lower mold core, the lower mold pressing ring 3 is fixed to the lower mold frame 1 by means of bolts, the upper mold pad 8 is fixed to the top of the mold mounting cavity of the upper mold frame 7 by means of locating pins and bolts, the locating pins and bolts are both countersunk to facilitate the installation and limitation of the upper mold core, the pressure plate 9 is fixed by means of bolts, the guide member is used for guiding the cooperation between the upper mold frame 7 and the lower mold frame 1, and the lower mold frame 1, the lower mold pad 2 and the lower mold pressing ring 3 are installed to form a mold positioning frame structure.

[0022] Secondly, the guide post 4 is fixedly connected to the lower mold frame 1 and is located on the side of the lower mold frame 1 close to the upper mold frame 7. The guide sleeve 5 is fixedly connected to the upper mold frame 7 and slidably connected to the guide post 4. It is located on the side of the upper mold frame 7 close to the guide post 4. The guide post 4 has a T-shaped cross-section, and the mounting plate is fixed to the lower mold frame 1 via locating pins and bolts. The guide sleeve 5 has a T-shaped cross-section and is fixed to the upper mold frame 7 via locating pins and bolts, and can slide with the guide post 4.

[0023] Then, the outer surface of the guide post 4 is provided with a wear-resistant layer. By arranging the wear-resistant layer on the outer surface of the guide post 4, it is beneficial to improve its sliding friction life, extend the replacement time, and reduce the use cost.

[0024] Furthermore, the inner surface of the guide sleeve 5 is provided with a wear-resistant layer. Providing the wear-resistant layer on the inner surface of the guide sleeve 5 is beneficial to improving the friction life of the guide sleeve 5 when sliding with the guide post 4, extending the replacement time and reducing the use cost.

[0025] Finally, the guide sleeve 5 is formed by integrally forming and stamping the guide sleeve 5 through a mold, which is conducive to obtaining better dimensional accuracy.

[0026] When the present invention is used to solve the problem that the existing clamp mold frame is difficult to adjust the upper and lower molds when changing the mold, which is not conducive to processing and use, when the mold frame and the alignment frame are in use, the upper mold frame 7 and the lower mold frame 1 are first installed on the pressure head and the lower workbench of the press respectively. During installation, it is necessary to ensure that the upper mold frame 7 and the lower mold frame 1 are aligned, that is, the guide column 4 and the guide sleeve 5 cooperate to slide up and down flexibly. When installing the mold, first install the lower mold core, then install the lower mold pressing ring 3, and then slightly tighten the connecting bolts of the pressure plates 9 at various locations on the lower mold frame 1 to preliminarily fix the lower mold core and install the mold positioning frame, that is, the lower mold frame 1, the lower mold pad 2 and the lower mold pressing ring 3 are installed to form a mold positioning frame structure, and the lower end hole is sleeved outside the lower mold core, the upper mold core and the upper mold pressing ring 6 are installed, and the pressure plates 9 at various locations on the upper mold frame 7 are screwed. The upper mold core is initially fixed by connecting the bolts, and the press is started so that the pressure head slider drives the upper mold frame 7 to move downward and slowly contact the mold positioning frame. During the process, the holes of the upper mold pressing ring 6 are inserted into the outer circle of the upper stop of the mold positioning frame. In order to facilitate the disassembly of the upper mold core, a certain gap is designed between the mold core and the mold frame. In this process, the position of the pressure plate 9 of the upper mold core and the upper mold frame 7 needs to be adjusted to adapt to the position of the mold positioning frame, and the upper mold frame 7 is continued to be moved downward. Finally, the upper mold pressing ring 6 and the lower mold pressing ring 3 are completely fitted with the end face of the mold positioning frame. After observing that they are fitted everywhere, the pressure plate 9 bolts at each location are tightened to ensure that the mold is installed and fixed. Then, the mold core can be heated and the product can be processed. Through this structure, the mold installation and alignment can be better performed, thereby solving the problem that the existing fixture mold frame is difficult to adjust the upper and lower mold misalignment during mold change, which is not conducive to processing and use.

[0027] Finally, a motorcycle crankshaft forging die frame adjustment device is used to adjust the motorcycle crankshaft forging die frame.

[0028] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.

Claims

1. A forging die set for a motorcycle crankshaft crank, comprising a lower die set, characterized in that: Also included are auxiliary components; The auxiliary components include an upper mold frame, a lower mold pad, a lower mold pressing ring, an upper mold pad, an upper mold pressing ring, a pressure plate and a guide member. The upper mold frame is located above the lower mold frame, the lower mold pad is arranged in the lower mold frame, the lower mold pressing ring is detachably connected to the lower mold frame, and is located on the side of the lower mold frame close to the upper mold frame, the upper mold pad is arranged in the upper mold frame, the upper mold pressing ring is detachably connected to the upper mold frame, and is located on the side of the upper mold frame close to the lower mold frame, the pressure plates are respectively arranged on one side of the upper mold frame and the lower mold frame, and the guide member is arranged on the side of the lower mold frame close to the upper mold frame.

2. The motorcycle crankshaft forging die set according to claim 1, characterized in that: The guide member includes a guide column and a guide sleeve. The guide column is fixedly connected to the lower mold frame and is located on the side of the lower mold frame close to the upper mold frame; the guide sleeve is fixedly connected to the upper mold frame and is slidably connected to the guide column, and is located on the side of the upper mold frame close to the guide column.

3. The motorcycle crankshaft forging die set according to claim 2, wherein: The outer surface of the guide column is provided with a wear-resistant layer.

4. The motorcycle crankshaft forging die set according to claim 2, wherein: The inner surface of the guide sleeve is provided with a wear-resistant layer.

5. The motorcycle crankshaft forging die set according to claim 4, characterized in that: The guide sleeve is formed by integrally forming and punching through a mold.

6. A motorcycle crankshaft forging die frame adjustment device, characterized in that: Used to adjust the motorcycle crankshaft forging die set as described in any one of claims 1 to 5.

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