A mould for a marine crankshaft flange hole

Abstract

This utility model relates to a mold for machining flange holes on marine crankshafts. The mold includes a mold body, a guide sleeve, and a connecting assembly. The mold body has circular recesses on both end faces, one of which mates with the crankshaft splicing end flange, and the other recess mates with the shape of the ship's shafting flange. A through hole corresponding to the flange connection hole position is provided on the bottom surface of the recess. An intermediate sleeve is fitted inside the through hole. The guide sleeve is a stepped hollow cylinder, with its central hole matching the pre-machined dimensions of the flange connection hole. The diameter of the first end of the guide sleeve is larger than that of the intermediate sleeve, and its second end mates with the inner diameter of the intermediate sleeve and can be inserted into the intermediate sleeve from either end face of the mold body. The connecting assembly is used to embed and fix the flange in the recess through the through hole. Its advantages are: using a double-sided mold as the machining reference during the machining of the flange connection holes on the crankshaft flange and shafting flange allows for direct docking and fixing of the crankshaft flange and the ship's shafting flange after machining.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a mold for a marine crankshaft flange hole. Background Technology

[0002] During manufacturing, the crankshaft output flange connection holes and the hull shaft flange connection holes are semi-finished with required allowances. Finally, after assembly and alignment within the shipyard, the connection holes are precision-machined using the same hinge, ensuring the coaxiality of both flanges. Due to limited space within the shipyard and the large dimensions of the crankshaft and shaft flanges, alignment is difficult. Furthermore, high-precision, large-scale equipment cannot be used; only simple equipment can be used for the same hinge machining, resulting in low efficiency and significant waste of manpower and resources. Additionally, the hole accuracy cannot be effectively guaranteed, requiring the installation of precision bolts only after the holes are fully finished, thus extending the production cycle.

[0003] This utility model addresses the shortcomings of existing technologies. Utility Model Content

[0004] The aim is to address the shortcomings of existing technologies by proposing a mold for marine crankshaft flange holes, which serves as a machining reference during the machining of flange connection holes in crankshaft flanges and shaft flanges.

[0005] To achieve the aforementioned objectives, this utility model first proposes a mold for marine crankshaft flange holes, implemented through the following technical solution:

[0006] A mold for a marine crankshaft flange hole, characterized in that the mold comprises:

[0007] The mold body is flat, with circular recesses on both end faces. These two recesses are coaxially arranged, with one recess fitting into the shape of the crankshaft splice flange to be processed and the other recess fitting into the shape of the ship shaft flange to be processed. The bottom surface of each recess has a through hole corresponding to the flange connection hole position of the flange blank to be processed. Intermediate sleeves with interference fit are fitted into each through hole.

[0008] Several guide sleeves are in the shape of stepped hollow cylinders, and their central holes match the pre-processing dimensions of the flange connection holes of the flange to be processed; the diameter of the first end of the guide sleeve is larger than that of the intermediate sleeve, and the outer diameter of its second end matches the inner diameter of the intermediate sleeve and can be inserted into the intermediate sleeve from any side end face of the mold body; the guide sleeve can be locked relative to the intermediate sleeve by a locking mechanism when inserted into the intermediate sleeve.

[0009] Several connecting components are used to embed and fix the flange to be processed into the circular recess through a portion of the through hole.

[0010] The intermediate sleeve has a protrusion at each end along its circumference. Each protrusion has an inclined groove on its inner side. The inclined groove has a vertical end face perpendicular to the central axis of the intermediate sleeve and an inclined guide surface that slopes from the bottom of the vertical end face toward the center of the end of the intermediate sleeve. An eccentric annular segment is also formed between the first end and the second end of the guide sleeve. The outer side of the relatively narrow part of the eccentric annular segment matches the shape of the inclined guide surface of the protrusion. When the guide sleeve is inserted into the intermediate sleeve and rotated, the eccentric annular segment can be locked at the inclined groove of the protrusion and lock the guide sleeve and the intermediate sleeve relatively.

[0011] An annular groove is formed on the circumferential surface of the first end of the guide sleeve. A screw hole is provided on the outer periphery of the through hole for installing a bolt whose head can be partially embedded in the groove, thereby locking the guide sleeve in the intermediate sleeve.

[0012] The connecting assembly includes a double-ended stud and two pressure plates. The double-ended stud can pass through the flange connection hole and the through hole of the flange to be processed, and its two ends pass through a pressure plate respectively. It is then tightened by nuts so that the two pressure plates press and fix the flange to be processed onto the mold body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] A double-sided mold is used as the machining reference in the machining process of the flange connection holes of the crankshaft flange and the shafting flange. One side of the mold matches the shape of the crankshaft flange, and the other side matches the shape of the shafting flange. The position of the through hole used for positioning is determined. In this way, after machining, the crankshaft flange and the hull shafting flange can be directly connected and fixed, eliminating the need for assembly and alignment in the hull before machining. This reduces the difficulty of machining the two flanges together and significantly improves machining efficiency and product quality. Attached Figure Description

[0015] The above features and advantages of the present invention will become clearer and easier to understand from the following description of exemplary embodiments thereof in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the mold structure of Embodiment 1 of the present invention;

[0017] Figure 2 This is a cross-sectional view of the mold according to Embodiment 1 of the present invention;

[0018] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0019] Figure 4 This is a cross-sectional view of the mold in Embodiment 2 of the present invention;

[0020] Figure 5for Figure 4 A magnified view of a portion of the image;

[0021] Figure 6 This is a schematic diagram of the guide sleeve in Embodiment 2 of the present invention;

[0022] Figure 7 for Figure 6 Sectional view along axis AA;

[0023] Figure 8 This is a cross-sectional view of the intermediate sleeve in Embodiment 2 of the present invention;

[0024] Figure 9 This is a side view of the guide sleeve in Embodiment 2 of the present invention;

[0025] Figure 10 This is a schematic diagram of the ship's shafting flange structure;

[0026] Figure 11 This is a schematic diagram of the crankshaft structure;

[0027] Figure 12 This is a schematic diagram of the crankshaft splicing end. Detailed Implementation

[0028] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model. The present utility model will now be described in further detail with reference to the accompanying drawings to facilitate understanding by those skilled in the art:

[0035] Example 1, see Figure 1-3 As shown in Figures 10-12, this embodiment 1 provides a mold for a marine crankshaft flange hole, the mold comprising:

[0036] Mold body 1

[0037] The mold body 1 is roughly circular and flat, with lifting lugs 11 on its outer edge for easy hoisting. A circular recess 12 is provided on one end face of the mold body 1, and a circular recess 13 is provided on the opposite side. Both recesses 12 and 13 are cylindrical, and their openings are tapered to facilitate flange guidance. Recesses 12 and 13 are coaxially arranged. Recess 12 fits the shape of the crankshaft splice flange to be processed, allowing it to be embedded therein; recess 13 fits the shape of the ship shaft flange to be processed, allowing it to be embedded therein. The sidewalls of recesses 12 and 13 are both circumferential surfaces, enabling the positioning of the flange to be processed.

[0038] The mold body 1 has a through hole 14 on the bottom surface of the recessed part 12, which corresponds to the flange connection hole position of the flange blank to be processed. Since the recessed part 12 and the recessed part 13 are coaxial, the through hole 14 can also correspond to the flange hole position of the recessed part 13.

[0039] An intermediate sleeve 2 is fitted inside each through hole 14, and the intermediate sleeve 2 and the through hole 14 are interference fit.

[0040] Guide sleeve 3

[0041] There are multiple guide sleeves 3, which are stepped hollow cylinders, and their central holes match the pre-machining dimensions of the flange connection holes of the flange to be processed.

[0042] The diameter of the first end of the guide sleeve 3 is larger than that of the intermediate sleeve 2, and the outer diameter of its second end matches the inner diameter of the intermediate sleeve 2 and can be inserted into the intermediate sleeve 2 from any side end face of the mold body 1.

[0043] When the guide sleeve 3 is inserted into the intermediate sleeve 2, it can be locked relative to it by the locking mechanism.

[0044] In this embodiment 1, an annular groove 31 is formed on the circumferential surface of the first end of the guide sleeve 3. Both the recessed portion 12 and the recessed portion 13 have screw holes 15 on the outer periphery of the through hole 14. These screw holes 15 are used to install bolts 16. When the bolt 16 is screwed into the screw hole 15, its head can be partially embedded in the groove 31, thereby locking the guide sleeve 3 within the intermediate sleeve 2. During installation, the head of the bolt 16 can be first embedded into the groove 31, then the guide sleeve 3 can be inserted into the intermediate sleeve 2. After aligning the bolt shank of the bolt 16 with the screw hole 15, the bolt 16 is screwed in until it is fully tightened and the guide sleeve 3 is pressed against the bottom surface of the recess.

[0045] It should be noted that the mold body 1 and guide sleeve 3 are made of metal materials with high surface hardness and good wear resistance, while the intermediate sleeve 2 is made of metal materials with lower surface hardness. The intermediate sleeve protects the through hole of the mold body 1. When the accuracy of the intermediate sleeve exceeds the allowable accuracy requirements, it is removed and replaced with a new intermediate sleeve through a red sleeve, thus allowing for multiple cycles and extending the service life of the mold body. In a preferred embodiment, the intermediate sleeve 2 is made of 9CrWMn material with a surface hardness of HRC 58-64.

[0046] Connection components

[0047] The connecting assembly is used to embed and fix the flange to be processed into the recessed portion through a partial through-hole. In this embodiment 1, the connecting assembly includes a double-ended stud and two pressure plates. The double-ended stud can pass through the flange connection hole and through hole of the flange to be processed, and each end of it passes through a pressure plate and is tightened by a nut, so that the two pressure plates press and fix the flange to be processed onto the mold body. Since this kind of screw and pressure plate clamping and fixing method is a common technical means in the industry, it is omitted in the figure.

[0048] Example 2:

[0049] The difference between Embodiment 2 and Embodiment 1 lies in the locking mechanism structure used when the guide sleeve 3 is inserted into the intermediate sleeve 2.

[0050] See Figure 4-9 As shown, each end of the intermediate sleeve 2 has a protrusion 21 extending outward along its circumference. The cross-sectional shape of the protrusion 21 is arc-shaped, and its inner side is provided with an inclined groove. The inclined groove has a vertical end face 211 perpendicular to the central axis of the intermediate sleeve 2, and an inclined guide surface 212 that gradually slopes towards the center of the end of the intermediate sleeve 2 from the bottom end of the vertical end face 211. The vertical end face 211 is flush with the end face of the intermediate sleeve 2, and the outermost edge of the inclined guide surface 212 does not exceed the inner wall of the intermediate sleeve 2.

[0051] An eccentric annular segment 32 is formed between the first end and the second end of the guide sleeve 3. The outer side of the relatively narrow part of the tube wall of the eccentric annular segment 32 matches the shape of the inclined guide surface 212, so that when the guide sleeve 3 is inserted into the intermediate sleeve 2 and rotates, the eccentric annular segment 32 can be stuck in the inclined groove and relatively lock the guide sleeve 3 and the intermediate sleeve 2.

[0052] This locking structure allows operators to quickly assemble and disassemble the guide sleeve 3, improving work efficiency.

[0053] Based on the above embodiments, the processing method using the above mold will be briefly described below.

[0054] S1. Select either the crankshaft splice end flange blank or the hull shafting flange as the flange to be processed.

[0055] S2. Embed the flange to be processed into the recess on the corresponding side of the mold; and use connecting components to fix the flange to be processed into the recess of the mold through the through holes of the mold; in this step, the number of connecting components is 4 to n / 2, and they are evenly distributed along the circumference of the flange blank to be processed, where n is the number of flange connection holes of the flange to be processed. In a preferred embodiment, the number of connecting components is 4, and they are arranged in a cross shape;

[0056] S3. Install a guide sleeve in one of the through holes where no connecting components are installed, and lock the guide sleeve in the middle sleeve of the through hole by a locking mechanism; use a tool with a flexible drive shaft on a boring machine to pass through the middle hole of the guide sleeve fixed in step S2, and use the middle hole of the guide sleeve as a reference to machine the flange connection hole to be machined until the design requirements are met.

[0057] S4. Remove the guide sleeve at the machining point completed in S3, and install the connecting components at the corresponding machined flange connection holes and through holes; then remove the connecting components at the through holes where the connecting components have been installed.

[0058] And, repeat step S3, successively machining the through holes without the connecting components installed and the flange connection holes corresponding to the through holes with the connecting components removed; until all flange connection holes of the flanges selected in step S1 are completed.

[0059] S5. Select the remaining flange blank from the crankshaft splicing end flange or the hull shaft flange as the flange to be processed, and repeat steps S2-S4 until all flange connection holes of the flange to be processed selected in step S5 are completed.

[0060] Compared with the prior art, the beneficial effects of this utility model are:

[0061] A double-sided mold is used as the machining reference in the machining process of the flange connection holes of the crankshaft flange and the shafting flange. One side of the mold matches the shape of the crankshaft flange, and the other side matches the shape of the shafting flange. The position of the through hole used for positioning is determined. In this way, after machining, the crankshaft flange and the hull shafting flange can be directly connected and fixed, eliminating the need for assembly and alignment in the hull before machining. This reduces the difficulty of machining the two flanges together and significantly improves machining efficiency and product quality.

[0062] This allows the crankshaft flange and the hull shaft flange to be directly connected and fixed, eliminating the need for assembly and alignment in the hull before further processing. This reduces the difficulty of machining the two flanges together and significantly improves processing efficiency and product quality.

[0063] The present invention has been described in detail above through embodiments. However, those skilled in the art will understand that the above embodiments are only one of the preferred embodiments of the present invention. Due to space limitations, not all embodiments can be listed here. Any implementation that can embody the technical solution of the claims of the present invention is within the protection scope of the present invention.

Claims

1. A mold for a marine crankshaft flange hole, characterized in that, The mold includes: The mold body is flat, with circular recesses on both end faces. These two recesses are coaxially arranged, with one recess fitting into the shape of the crankshaft splice flange to be processed and the other recess fitting into the shape of the ship shaft flange to be processed. The bottom surface of each recess has a through hole corresponding to the flange connection hole position of the flange blank to be processed. Intermediate sleeves with interference fit are fitted into each through hole. Several guide sleeves are in the shape of stepped hollow cylinders, and their central holes match the pre-processing dimensions of the flange connection holes of the flange to be processed; the diameter of the first end of the guide sleeve is larger than that of the intermediate sleeve, and the outer diameter of its second end matches the inner diameter of the intermediate sleeve and can be inserted into the intermediate sleeve from any side end face of the mold body; the guide sleeve can be locked relative to the intermediate sleeve by a locking mechanism when inserted into the intermediate sleeve. Several connecting components are used to embed and fix the flange to be processed into the circular recess through a portion of the through hole.

2. The mold for a marine crankshaft flange hole according to claim 1, characterized in that: The intermediate sleeve has a protrusion at each end along its circumference. Each protrusion has an inclined groove on its inner side. The inclined groove has a vertical end face perpendicular to the central axis of the intermediate sleeve and an inclined guide surface that slopes from the bottom of the vertical end face toward the center of the end of the intermediate sleeve. An eccentric annular segment is also formed between the first end and the second end of the guide sleeve. The outer side of the relatively narrow part of the eccentric annular segment matches the shape of the inclined guide surface of the protrusion. When the guide sleeve is inserted into the intermediate sleeve and rotated, the eccentric annular segment can be locked at the inclined groove of the protrusion and lock the guide sleeve and the intermediate sleeve relatively.

3. The mold for a marine crankshaft flange hole according to claim 1, characterized in that: An annular groove is formed on the circumferential surface of the first end of the guide sleeve. A screw hole is provided on the outer periphery of the through hole for installing a bolt whose head can be partially embedded in the groove, thereby locking the guide sleeve in the intermediate sleeve.

4. A mold for a marine crankshaft flange hole according to claim 1, characterized in that: The connecting assembly includes a double-ended stud and two pressure plates. The double-ended stud can pass through the flange connection hole and the through hole of the flange to be processed, and its two ends pass through a pressure plate respectively. It is then tightened by nuts so that the two pressure plates press and fix the flange to be processed onto the mold body.

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