A crankshaft lathe faceplate with support and locking device

Abstract

This utility model relates to the field of machining technology, and in particular to a crankshaft lathe faceplate with a support and locking device. The faceplate body is equipped with a support device, and a ring is provided around the circumference of the faceplate body. At least one locking device is provided around the faceplate body, comprising two opposing clamping members for locking the ring. Each clamping member is equipped with a pin as a fulcrum and can swing around it. Each clamping member has a piston at its tail as a drive for its swing. The pistons of the two clamping members are arranged oppositely, with opposite pushing directions. In this embodiment of the utility model, a ring is provided at the edge of the faceplate body, and a locking device is provided around the faceplate body, comprising two clamping members that can lock the ring. Each clamping member is equipped with a piston, and the piston's pushing action can quickly lock the ring, thereby locking the faceplate. This prevents changes in the angle of force on the workpiece during crankshaft journal machining, thus ensuring crankshaft machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a crankshaft lathe faceplate with a support and locking device. Background Technology

[0002] A faceplate is a cast iron disc-shaped part mounted on the spindle of a lathe, mainly used to clamp workpieces with complex shapes. When machining heavy workpieces, the excessive weight causes the spindle at one end of the faceplate to experience excessive downward vertical force, leading to deformation and affecting machining accuracy. Existing technology, such as Chinese utility model patent CN219403252U, discloses a faceplate support device for a floor-mounted lathe. This device provides initial support to the faceplate through a support ring, rollers, and a first fastening plate, preventing damage to the machine tool spindle. Further support is provided by a support base and support rollers at the bottom, minimizing faceplate displacement and preventing downward displacement of the spindle and faceplate due to force, thus improving machining accuracy.

[0003] Large marine low-speed diesel engine crankshafts are heavy-duty machining workpieces. During machining, existing faceplates with support devices can be used. The crankshaft journals of large marine low-speed diesel engines are machined using a crankshaft lathe with a cyclone tool post. During machining, the lathe spindle faceplate rotates the workpiece to a specific angle and maintains it stably. The tool mounted on the cyclone tool post's rotating ring performs circumferential cutting on the journal. In this case, especially for heavy crankshaft workpieces, existing faceplates, relying solely on spindle locking for crankshaft workpiece angle positioning, are not very stable and cannot meet the machining accuracy requirements of the crankshaft journals. Utility Model Content

[0004] The purpose of this utility model is to provide a crankshaft lathe faceplate with a support and locking device to solve the problems existing in the prior art. To achieve the above objective, this utility model solves the problem through the following technical solution:

[0005] This utility model provides a crankshaft lathe faceplate with a support and locking device. The faceplate body is equipped with a support device. The faceplate body has a ring around its circumference and at least one locking device around it. The locking device includes two oppositely arranged clamping members for locking the ring. Each clamping member is equipped with a pin as a fulcrum and can swing around it. Each clamping member has a piston at its tail as a drive for its swing. The pistons of the two clamping members are oppositely arranged and push in opposite directions.

[0006] As a further technical solution, four locking devices are provided around the flower plate body, evenly arranged.

[0007] As a further technical solution, the ring is located on the inner edge of the circumference of the flower plate body.

[0008] As a further technical solution, the two pistons share a common oil inlet passage.

[0009] As a further technical solution, the clamping surface of the clamping member is provided with an arc-shaped protrusion.

[0010] As a further technical solution, the clamping surface of the clamping member is provided with a removable adjustment shim.

[0011] As a further technical solution, the clamping surface of the clamping member is provided with a removable friction pad.

[0012] As a further technical solution, the clamping member is S-shaped streamlined.

[0013] As a further technical solution, the support device includes an integral support mechanism located at the lower part of the flower plate body, which includes a support base with an arc-shaped structure. Multiple sets of support rollers are movably installed inside the support base, and the upper ends of the support rollers are in contact with the flower plate body.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention features a ring body on the edge of the faceplate body and a locking device around the faceplate body. The locking device includes two clamping parts that can lock the ring body. Each clamping part is equipped with a piston. Under the push of the piston, the ring body can be quickly locked, thereby locking the faceplate. This prevents the workpiece from undergoing angular changes in force during the machining of crankshaft journals for large marine low-speed diesel engines, thus ensuring the machining accuracy of the crankshaft. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute a limitation thereof. It should also be understood that these drawings are shown for simplicity and clarity and are not necessarily drawn to scale. This utility model will now be described and explained with additional features and details using the drawings, wherein:

[0017] Figure 1 This shows an isometric view of the crankshaft lathe faceplate with support and locking device in an embodiment of the present invention;

[0018] Figure 2 This shows a front view of a crankshaft lathe faceplate with a support and locking device in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the flower plate body structure in an embodiment of this utility model is shown;

[0020] Figure 4A schematic diagram of the locking device structure in an embodiment of this utility model is shown;

[0021] Figure 5 A partial cross-sectional schematic diagram of the locking device in an embodiment of this utility model is shown;

[0022] Figure 6 A schematic diagram of the first type of clamping member in an embodiment of this utility model is shown;

[0023] Figure 7 A schematic diagram of the second type of clamping member in an embodiment of this utility model is shown;

[0024] Figure 8 A schematic diagram of the third type of clamping member in an embodiment of this utility model is shown.

[0025] In the diagram: 1. Headstock; 2. Worktable; 3. Flower plate body; 31. Ring; 4. Locking device; 41. Mounting base; 42. Upper clamping component; 421. Tail end; 422. Head end; 423. Protrusion; 424. Pin hole; 425. Adjusting shim; 426. Friction lining; 43. Lower clamping component; 44. Pin; 45. Upper piston; 46. Lower piston; 47. Oil inlet passage; 5. Overall support mechanism. Detailed Implementation

[0026] The technical solutions in the typical embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a crankshaft lathe faceplate with a support and locking device. The faceplate body 3 is equipped with a support device, which includes an integral support mechanism 5 located at the lower part of the faceplate body 3. The integral support mechanism 5 is mounted on the worktable 2 and includes a support base with an arc-shaped structure. Multiple sets of support rollers are movably installed inside the support base, and the upper ends of the support rollers are in contact with the faceplate body 3. The specific structure of the integral support mechanism can be found in the integral support structure in Chinese Utility Model Patent No. CN219403252U. In addition, the support device in this embodiment may also include a protective support mechanism therein, the specific structure of which will not be described here.

[0028] like Figure 3 As shown, a ring 31 is provided on the circumferential edge of the flower plate body 3. In this embodiment, the ring 31 is located on the inner edge of the circumference of the flower plate body 3. It should be noted that after the flower plate body 3 is installed, the side closer to the headboard box 1 is the inner side, and the side farther away is the outer side. The purpose of placing the ring 31 on the inner edge of the circumference of the flower plate body 3 is to leave sufficient installation space for the overall support mechanism 5.

[0029] At least one locking device 4 is provided around the flower plate body 3. In this embodiment, four locking devices 4 are provided around the flower plate body 3, evenly arranged. It is understood that in some other embodiments, other numbers of locking devices 4 may be used, and are not limited to the number shown in this embodiment.

[0030] All locking devices 4 are installed on the headboard box 1 and are fixed by bolts.

[0031] like Figure 4 and Figure 5 As shown, the locking device 4 includes two oppositely arranged clamping members for locking the ring body 31; each clamping member is equipped with a pin 44 as a fulcrum and can swing around it, and each clamping member has a piston at its tail 421 as the drive for its swing. The pistons of the two clamping members are arranged opposite to each other and installed in the space between the tails 421 of the two clamping members, with opposite pushing directions.

[0032] Specifically, the clamping components are divided into an upper clamping component 42 and a lower clamping component 43, which are mounted on the mounting base 41. One end of the clamping component used to lock the ring body 31 is a head 422, and the other end is a tail 421. The tail 421 serves as the driving pushing position. The upper clamping component 42 is equipped with an upper piston 45, and the lower clamping component 43 is equipped with a lower piston 46. The two pistons are arranged opposite each other, but their pushing directions are opposite. During the locking process, driven by the pistons, the distance between the tails 421 of the two clamping components gradually increases, while the distance between the heads 422 gradually decreases, thereby achieving the purpose of locking the ring body 31.

[0033] The upper piston 45 and the lower piston 46 share a common oil inlet passage 47. Of course, each piston can also have its own independent oil inlet passage, and is not limited to the configuration in this embodiment.

[0034] After processing, the faceplate needs to be loosened, at which point the piston needs to retract. There are several methods for piston retraction in existing technologies. For example, if the piston only has one oil inlet path, a corresponding reset structure needs to be installed on the piston, which can be a spring or an elastic material such as rubber. If an oil inlet path is installed at one end of the piston and another at the other end, oil can be supplied from the other end when loosening is required. If necessary, the clamping component also needs a reset structure. For example, a spring can be installed between the tail of the clamping component and the mounting base. When the piston pushes against the tail of the clamping component, the spring is stretched. After the piston force is released, the clamping component resets under the action of the spring.

[0035] In this embodiment, a ring 31 is provided on the edge of the faceplate body 3, and a locking device 4 is provided around the faceplate body 3. The locking device 4 includes two clamping members that can lock the ring 31. Each clamping member is equipped with a piston. Under the push of the piston, the ring 31 can be quickly locked, thereby locking the faceplate body 3. This avoids changes in the angle of the workpiece under force during the machining of the crankshaft journal of a large marine low-speed diesel engine, thus ensuring the machining accuracy of the crankshaft.

[0036] like Figure 6 As shown, the clamping surface of the clamping member has an arc-shaped protrusion 423. The two pistons are positioned opposite each other, which may increase the initial distance between the heads of the two clamping members. If the ring thickness is smaller than the head distance at this point, the arc-shaped protrusion 423 allows for better contact with the ring 31 during locking. Additionally, as... Figure 7 As shown, a removable adjusting shim 425 can also be provided at the clamping surface of the clamping component. Depending on the head spacing of the clamping component and the thickness of the ring body under different initial states, an adjusting shim 425 of appropriate thickness can be selected to ensure good contact between the clamping component and the ring body.

[0037] The problem of excessive head spacing can also be addressed by improving the shape of the clamping components. For example... Figure 6 As shown, reduce the width of the clamping part's tail; it can also be done as follows: Figure 8 As shown, the clamping components are designed in an S-shaped streamline, which can reduce the distance between the heads of the two clamping components in the initial state.

[0038] like Figure 8 As shown, a removable friction pad 426 is provided at the clamping surface of the clamping member, which is made of friction-enhancing material to improve the friction between the clamping member and the ring 31.

[0039] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A crankshaft lathe chuck with a support and locking device, having a chuck body provided with a support device, characterized in that, The flower plate body has a ring around its circumference and at least one locking device around it. The locking device includes two clamping members arranged opposite to each other for locking the ring. Each clamping member is configured with a pin as a fulcrum and can swing around it. Each clamping member has a piston at its tail as a drive for its swing. The pistons of the two clamping members are arranged opposite to each other and push in opposite directions.

2. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, The flower plate body is provided with four locking devices, which are evenly arranged around it.

3. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, The ring is located on the inner edge of the circumference of the flower plate body.

4. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, Both pistons share a common oil inlet passage.

5. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, The clamping surface of the clamping member is provided with an arc-shaped protrusion.

6. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, The clamping surface of the clamping member is provided with a removable adjusting shim.

7. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, The clamping surface of the clamping member is provided with a removable friction pad.

8. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, The clamping element has an S-shaped streamline.

9. A crankshaft lathe faceplate with a support and locking device as described in claim 1, characterized in that, The support device includes an integral support mechanism located at the lower part of the flower plate body, which includes a support base with an arc-shaped structure. Multiple sets of support rollers are movably installed inside the support base, and the upper ends of the support rollers are in contact with the flower plate body.

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