Positioning device for numerical control machine tool machining

Abstract

The utility model discloses a positioning device for numerical control machine tool machining, and relates to the technical field of positioning devices. The device comprises a machine table, a machining table is arranged in the machine table, a positioning assembly is arranged at the top of the machining table, a reaming assembly is arranged at the top of the machine table, an elastic pushing assembly is arranged on the outer side of the reaming assembly, and inserting fine adjustment assemblies are arranged at the pushing end of the elastic pushing assembly and the moving end of the positioning assembly. According to the valve guide pipe hole broaching device, the plugging fine adjustment assembly is driven by the broaching assembly and the elastic pushing assembly to move downwards, so that the plugging fine adjustment assembly can conduct secondary positioning on the positioning assembly, and then the broaching assembly begins to conduct broaching operation on a valve guide pipe hole; through the arrangement, the phenomenon that the chambering end of the chambering assembly and the valve guide pipe hole are staggered due to initial alignment errors or machine tool vibration is avoided, and therefore the overall precision of the chambering operation of the valve guide pipe hole can be guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of positioning device technology, and more specifically, it relates to a positioning device for CNC machine tool processing. Background Technology

[0002] During the production of vehicle cylinder heads, in order to ensure the overall sealing performance after the valve guides are installed into the valve guide holes, the valve guide holes need to be precisely enlarged using machine tools. To achieve this goal, it is necessary to ensure that the drill bit on the machine tool can be accurately positioned and enter the valve guide holes. Therefore, a positioning device is needed to position the cylinder head, ultimately ensuring the sealing performance of the valve system and the reliability of engine operation.

[0003] After the existing machine tool completes the clamping and positioning of the cylinder head, if the drill bit is misaligned with the valve guide hole due to initial alignment error or machine tool vibration, the operator cannot detect and adjust it in time. As a result, the shape of the valve guide hole changes after the hole enlarging operation. This phenomenon makes it impossible for the outer surface of the valve guide to fit tightly with the valve guide hole during subsequent installation, ultimately affecting the cylinder head's airtightness and the engine's performance stability.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a positioning device for CNC machine tool processing to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a positioning device for CNC machine tool processing, including a machine base, a processing table is provided inside the machine base, a positioning component is provided on the top of the processing table, a hole enlarging component is provided on the top of the machine base, an elastic pushing component is provided on the outside of the hole enlarging component, and a plug-in fine adjustment component is provided on the pushing end of the elastic pushing component and the moving end of the positioning component.

[0008] The positioning component is used for initial positioning of the cylinder head. When the reaming component moves downward and reams the valve guide hole, the insertion end of the insertion fine-tuning component moves downward synchronously under the push of the elastic pushing component. At the same time, the insertion end moves into the moving end of the positioning component first, so that the positioning component completes fine-tuning under the push of the insertion end.

[0009] Furthermore, the positioning component includes a positioning mold, which is disposed on the top of the processing table. Several positioning frames are disposed on the outer side of the positioning mold. An L-shaped positioning plate is movably connected inside the positioning frame. A connecting rod is fixedly connected to one end of the L-shaped positioning plate. An adjusting column is disposed at one end of the connecting rod. A support plate is fixedly connected to the top of the processing table corresponding to the adjusting column. The adjusting column is movably connected to the support plate.

[0010] Furthermore, a first adjusting screw is rotatably connected to the outer side of the support plate, and an adjusting plate is threadedly connected to the outer surface of the first adjusting screw. The adjusting plate is fixedly installed at one end of the adjusting column.

[0011] Furthermore, the hole-reaming assembly includes a lifting frame, which is disposed on the top of the processing table. A motor is fixedly installed inside the lifting frame, and a drill bit is fixedly installed at the output end of the motor.

[0012] Furthermore, the elastic pushing component includes a mounting frame, which is fixedly installed on the outside of the lifting frame. Several support frames are fixedly connected to the outside of the mounting frame corresponding to the L-shaped positioning plate. A storage cylinder is provided inside the support frame. A T-shaped rod is movably connected to the top of the storage cylinder. The bottom end of the T-shaped rod passes through the storage cylinder. The plug-in fine-tuning component is located at the bottom end of the T-shaped rod. A connecting plate is movably connected inside the storage cylinder. The connecting plate is fixedly connected to the T-shaped rod. A pushing spring is fixedly connected between the connecting plate and the storage cylinder.

[0013] Furthermore, the inner wall of the support frame is provided with a support groove, and a support bar is movably connected inside the support groove. The support bar is fixedly connected to the storage cylinder. A second adjusting screw is threadedly connected to one side of the support frame, and one end of the second adjusting screw is rotatably connected to the storage cylinder.

[0014] Furthermore, the plug-in fine-tuning assembly includes a compression plate, which is fixedly installed at the bottom end of the T-shaped rod. A plug-in block is fixedly connected to the bottom of the compression plate. One side of the plug-in block is inclined. The top of the L-shaped positioning plate has a plug-in groove corresponding to the plug-in block. A storage cavity is formed inside the adjusting column. A limiting plate is movably connected inside the storage cavity. One end of the connecting rod extends into the storage cavity and is fixedly connected to the limiting plate. A limiting spring is fixedly connected between the limiting plate and the inner wall of the storage cavity.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model uses a positioning component to initially position the cylinder head. Then, the reaming component and the elastic pushing component drive the insertion fine-tuning component to move downwards, allowing the insertion fine-tuning component to push the positioning component first, thus enabling the insertion fine-tuning component to perform secondary positioning of the positioning component. Next, the reaming component begins to ream the valve guide hole. Since the insertion fine-tuning component can fine-tune the positioning component, it avoids the phenomenon of misalignment between the reaming end of the reaming component and the valve guide hole due to initial alignment error or machine tool vibration. This ensures the overall accuracy of the valve guide hole after the reaming operation and also ensures the sealing between the valve guide and the valve guide hole.

[0017] 2. This utility model uses a first adjusting screw to push an adjusting column. The moving adjusting column, via a connecting rod, can drive the L-shaped positioning plate to adjust its position according to different specifications of positioning molds, thereby allowing several positioning frames set on the outside of the positioning mold to move normally to the corresponding L-shaped positioning plate. A second adjusting screw pushes the storage cylinder inside the support frame, causing the storage cylinder to drive the insertion block to adjust its position according to different specifications of positioning molds via a T-shaped rod. The above configuration allows the positioning device to position cylinder heads of different specifications, thereby improving the overall practicality of the machine tool.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the external outline structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the hole-expanding assembly structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the elastic pushing component structure of this utility model;

[0023] Figure 4 This is a cross-sectional view of the storage tube of this utility model;

[0024] Figure 5 This is a schematic diagram of the positioning component structure of this utility model;

[0025] Figure 6 This is a cross-sectional view of the adjusting column of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Machine base; 2. Processing table; 3. Positioning assembly; 301. Positioning mold; 302. Positioning frame; 303. L-shaped positioning plate; 304. Connecting rod; 305. Adjusting column; 306. Support plate; 307. First adjusting screw; 308. Adjusting plate; 4. Hole enlarging assembly; 401. Lifting frame; 402. Motor; 403. Drill bit; 5. Elastic pushing assembly; 501. Mounting frame; 502. Support frame; 503. Storage cylinder; 504. T-shaped rod; 505. Connecting plate; 506. Push spring; 507. Support groove; 508. Support bar; 509. Second adjusting screw; 6. Insertion fine-tuning assembly; 601. Extrusion plate; 602. Insertion block; 603. Insertion groove; 604. Storage cavity; 605. Limiting plate; 606. Limiting spring. Detailed Implementation

[0028] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0029] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements 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 the utility model.

[0030] Please see Figures 1-6 As shown, this utility model is a positioning device for CNC machine tool processing, including a machine base 1, a processing table 2 is provided inside the machine base 1, a positioning component 3 is provided on the top of the processing table 2, a hole enlarging component 4 is provided on the top of the machine base 1, an elastic pushing component 5 is provided on the outside of the hole enlarging component 4, and a plug-in fine adjustment component 6 is provided on the pushing end of the elastic pushing component 5 and the moving end of the positioning component 3.

[0031] The positioning component 3 is used for preliminary positioning of the cylinder head. When the reaming component 4 moves downward and reams the valve guide hole, the insertion end of the insertion fine-tuning component 6 moves downward synchronously under the push of the elastic pushing component 5. At the same time, the insertion end moves into the moving end of the positioning component 3 first, so that the positioning component 3 completes fine-tuning under the push of the insertion end.

[0032] By placing the cylinder head inside the positioning component 3, the positioning component 3 performs initial positioning of the cylinder head. Then, the reaming component 4 is driven, causing the reaming component 4 to move downward synchronously through the elastic pushing component 5 and the insertion fine-tuning component 6. At the same time, the insertion fine-tuning component 6 is connected to the moving end of the positioning component 3 and pushed by the elastic pushing component 5, so that the insertion fine-tuning component 6 completes the secondary positioning of the positioning component 3. Then, the reaming end of the reaming component 4 begins to ream the valve guide hole on the cylinder head.

[0033] The cylinder head is initially positioned by the positioning component 3. Then, the reaming component 4 and the elastic pushing component 5 drive the insertion fine-tuning component 6 to move downwards, allowing the insertion fine-tuning component 6 to push the positioning component 3 first, thus enabling the insertion fine-tuning component 6 to perform secondary positioning of the positioning component 3. Next, the reaming component 4 begins to ream the valve guide hole. Since the insertion fine-tuning component 6 can fine-tune the positioning component 3, it avoids the reaming end of the reaming component 4 from being misaligned with the valve guide hole due to initial alignment errors or machine tool vibration. This ensures the overall accuracy of the valve guide hole after the reaming operation and also ensures the sealing between the valve guide and the valve guide hole.

[0034] In one embodiment, the positioning component 3 includes a positioning mold 301, which is disposed on the top of the processing table 2. A plurality of positioning frames 302 are disposed on the outer side of the positioning mold 301. An L-shaped positioning plate 303 is movably connected inside the positioning frame 302. A connecting rod 304 is fixedly connected to one end of the L-shaped positioning plate 303. An adjusting column 305 is disposed at one end of the connecting rod 304. A support plate 306 is fixedly connected to the top of the processing table 2 corresponding to the adjusting column 305. The adjusting column 305 is movably connected to the support plate 306.

[0035] Multiple positioning molds 301 are provided according to the specifications of the cylinder head. When enlarging valve guide holes of different specifications, the adjusting columns 305 on several support plates 306 are moved, thereby causing the adjusting columns 305 to drive the L-shaped positioning plate 303 to move through the connecting rod 304, and move the L-shaped positioning plate 303 to the appropriate position. Then, the corresponding positioning mold 301 is placed on the top of the processing table 2, and the multiple positioning frames 302 provided on the outside of the positioning mold 301 are moved into the interior of the corresponding L-shaped positioning plate 303. At this time, the multiple positioning plates 303 and positioning frames 302 can position the positioning mold 301.

[0036] In one embodiment, for the support plate 306, a first adjusting screw 307 is rotatably connected to the outer side of the support plate 306, and an adjusting plate 308 is threadedly connected to the outer surface of the first adjusting screw 307. The adjusting plate 308 is fixedly installed at one end of the adjusting column 305.

[0037] By rotating the first adjusting screw 307, the rotating first adjusting screw 307 can push the adjusting column 305 through the adjusting plate 308, thereby adjusting the position of the L-shaped positioning plate 303. Since the first adjusting screw 307 and the adjusting plate 308 have a self-locking function, the adjusting column 305 will not move arbitrarily on the support plate 306 after the adjustment is completed.

[0038] In one embodiment, the hole-reaming assembly 4 includes a lifting frame 401, which is disposed on the top of the processing table 2. A motor 402 is fixedly installed inside the lifting frame 401, and a drill bit 403 is fixedly installed at the output end of the motor 402.

[0039] The lifting frame 401 can be connected to the machine base 1 via a lifting hydraulic cylinder. The lifting hydraulic cylinder can move the lifting frame 401 downward on the machine base 1. At this time, the lifting frame 401 drives the drill bit 403 to move towards the valve guide hole via the motor 402. When the drill bit 403 moves to the predetermined position, the drill bit 403 performs a hole enlarging operation on the valve guide hole on the cylinder head under the drive of the motor 402.

[0040] In one embodiment, the elastic pushing component 5 includes a mounting frame 501, which is fixedly mounted on the outside of the lifting frame 401. A plurality of support frames 502 are fixedly connected to the outside of the mounting frame 501 corresponding to the L-shaped positioning plate 303. A storage cylinder 503 is provided inside the support frame 502. A T-shaped rod 504 is movably connected to the top of the storage cylinder 503, and the bottom end of the T-shaped rod 504 penetrates through the storage cylinder 503. A plug-in fine-tuning component 6 is located at the bottom end of the T-shaped rod 504. A connecting plate 505 is movably connected inside the storage cylinder 503, and the connecting plate 505 is fixedly connected to the T-shaped rod 504. A pushing spring 506 is fixedly connected between the connecting plate 505 and the storage cylinder 503.

[0041] The lifting frame 401 moves the insertion fine-tuning component 6 downward through the mounting frame 501, the storage cylinder 503, and the T-shaped rod 504. This causes the insertion fine-tuning component 6 to push the L-shaped positioning plate 303. After the insertion fine-tuning component 6 completes the fine-tuning of the positioning mold 301 through the L-shaped positioning plate 303, the lifting frame 401 continues to move downward. At this time, the insertion fine-tuning component 6 stops moving, causing the T-shaped rod 504 to compress the push spring 506 through the connecting plate 505. At the same time, the T-shaped rod 504 can continuously move inside the storage cylinder 503, so that the drill bit 403 contacts the cylinder head and begins the hole reaming operation. In the above configuration, under the push of the push spring 506 and the T-shaped rod 504, when the drill bit 403 is performing hole reaming, the insertion fine-tuning component 6 can complete the fine-tuning of the positioning mold 301 in advance, thereby ensuring the overall accuracy of the valve guide hole after the hole reaming operation.

[0042] In one embodiment, for the support frame 502, a support groove 507 is provided on the inner wall of the support frame 502, and a support bar 508 is movably connected inside the support groove 507. The support bar 508 is fixedly connected to the storage cylinder 503, and a second adjusting screw 509 is threadedly connected to one side of the support frame 502. One end of the second adjusting screw 509 is rotatably connected to the storage cylinder 503.

[0043] By rotating the second adjusting screw 509, the storage cylinder 503 can be pushed, causing it to move inside the support frame 502. Simultaneously, the support bar 508 slides inside the support groove 507 under the influence of the storage cylinder 503. This arrangement allows the insertion fine-tuning component 6 to be adjusted in position after the specifications of the positioning mold 301 are changed, enabling the insertion fine-tuning component 6 to perform fine-tuning on positioning molds 301 of different specifications.

[0044] In one embodiment, the aforementioned plug-in fine-tuning component 6 includes a pressing plate 601, which is fixedly installed at the bottom end of the T-shaped rod 504. A plug-in block 602 is fixedly connected to the bottom of the pressing plate 601. One side of the plug-in block 602 is inclined. The top of the L-shaped positioning plate 303 is provided with a plug-in groove 603 corresponding to the plug-in block 602. A storage cavity 604 is provided inside the adjusting column 305. A limiting plate 605 is movably connected inside the storage cavity 604. One end of the connecting rod 304 extends into the storage cavity 604 and is fixedly connected to the limiting plate 605. A limiting spring 606 is fixedly connected between the limiting plate 605 and the inner wall of the storage cavity 604.

[0045] The L-shaped positioning plate 303 can slide inside the positioning frame 302. When several T-shaped rods 504 drive the extrusion plate 601 downward and cause several insertion blocks 602 to move into the insertion groove 603, if the position of the positioning mold 301 deviates at this time, as the insertion blocks 602 continue to move downward, the inclined surface of the insertion blocks 602 can push the L-shaped positioning plate 303 through the insertion groove 603, thereby allowing the positioning mold 301 to be adjusted in position under the push of the L-shaped positioning plate 303. During this process, as the L-shaped positioning plate 303 drives the limiting plate 605 in the receiving cavity 6 through the corresponding connecting rod 304... The internal movement of the 04 allows the limiting plate 605 to press against the limiting spring 606. After the insertion block 602 is fully moved into the insertion slot 603, the positioning mold 301 can complete the secondary positioning. At the same time, the pressing plate 601 can press against the positioning mold 301, so that the positioning mold 301 will not shake up and down during the hole enlargement operation. The setting of the limiting spring 606 and the limiting plate 605 in the above settings prevents the connecting rod 304 from moving arbitrarily, so that the adjustment of the position of the L-shaped positioning plate 303 and the initial positioning of the positioning mold 301 can be carried out normally.

[0046] Through the above technical solution, 1. The cylinder head is initially positioned by the positioning component 3. Then, the reaming component 4 and the elastic pushing component 5 drive the insertion fine-tuning component 6 to move downwards, allowing the insertion fine-tuning component 6 to push the positioning component 3 first, thus enabling the insertion fine-tuning component 6 to perform secondary positioning of the positioning component 3. Next, the reaming component 4 begins to ream the valve guide hole. Since the insertion fine-tuning component 6 can fine-tune the positioning component 3, it avoids the reaming end of the reaming component 4 from misaligning with the valve guide hole due to initial alignment errors or machine tool vibration. This ensures the overall accuracy of the valve guide hole after reaming and also ensures the sealing between the valve guide and the valve guide hole. 1. This can be guaranteed; 2. The first adjusting screw 307 pushes the adjusting column 305, and the moving adjusting column 305 can drive the L-shaped positioning plate 303 to adjust its position according to the positioning mold 301 of different specifications through the connecting rod 304, so that the positioning frames 302 set on the outside of the positioning mold 301 can move normally to the corresponding L-shaped positioning plate 303; the second adjusting screw 509 pushes the storage cylinder 503 inside the support frame 502, so that the storage cylinder 503 drives the plug block 602 to adjust its position according to the positioning mold 301 of different specifications through the T-shaped rod 504; the above settings enable the positioning device to position cylinder heads of different specifications, thereby improving the overall practicality of the machine tool.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 utility model. 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.

[0048] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning device for CNC machine tool machining, comprising a machine base (1), characterized in that, The machine tool (1) is equipped with a processing table (2) inside, a positioning component (3) is provided on the top of the processing table (2), a hole-expanding component (4) is provided on the top of the machine tool (1), an elastic pushing component (5) is provided on the outside of the hole-expanding component (4), and a plug-in fine-tuning component (6) is provided on the pushing end of the elastic pushing component (5) and the moving end of the positioning component (3). The positioning component (3) is used to perform preliminary positioning of the cylinder head. When the reaming component (4) moves downward and performs reaming operation on the valve guide hole, the insertion end of the insertion fine-tuning component (6) moves downward synchronously under the push of the elastic pushing component (5). At the same time, the insertion end moves into the moving end of the positioning component (3) first, so that the positioning component (3) completes fine-tuning under the push of the insertion end.

2. The positioning device for CNC machine tool machining according to claim 1, characterized in that, The positioning component (3) includes a positioning mold (301), which is set on the top of the processing table (2). Several positioning frames (302) are provided on the outside of the positioning mold (301). An L-shaped positioning plate (303) is movably connected inside the positioning frame (302). A connecting rod (304) is fixedly connected to one end of the L-shaped positioning plate (303). An adjusting column (305) is provided at one end of the connecting rod (304). A support plate (306) is fixedly connected to the top of the processing table (2) corresponding to the adjusting column (305). The adjusting column (305) is movably connected to the support plate (306).

3. A positioning device for CNC machine tool machining according to claim 2, characterized in that, The support plate (306) is rotatably connected to a first adjusting screw (307), and the outer surface of the first adjusting screw (307) is threadedly connected to an adjusting plate (308). The adjusting plate (308) is fixedly installed at one end of the adjusting column (305).

4. A positioning device for CNC machine tool machining according to claim 3, characterized in that, The hole enlarging assembly (4) includes a lifting frame (401), which is set on the top of the processing table (2). A motor (402) is fixedly installed inside the lifting frame (401), and a drill bit (403) is fixedly installed at the output end of the motor (402).

5. A positioning device for CNC machine tool machining according to claim 4, characterized in that, The elastic pushing component (5) includes a mounting frame (501), which is fixedly installed on the outside of the lifting frame (401). A number of support frames (502) are fixedly connected to the outside of the mounting frame (501) corresponding to the L-shaped positioning plate (303). A storage tube (503) is provided inside the support frame (502). A T-shaped rod (504) is movably connected to the top of the storage tube (503). The bottom end of the T-shaped rod (504) passes through the storage tube (503). The plug-in fine adjustment component (6) is located at the bottom end of the T-shaped rod (504). A connecting plate (505) is movably connected inside the storage tube (503). The connecting plate (505) is fixedly connected to the T-shaped rod (504). A pushing spring (506) is fixedly connected between the connecting plate (505) and the storage tube (503).

6. A positioning device for CNC machine tool machining according to claim 5, characterized in that, The inner wall of the support frame (502) is provided with a support groove (507), and a support bar (508) is movably connected inside the support groove (507). The support bar (508) is fixedly connected to the storage cylinder (503). A second adjusting screw (509) is threadedly connected to one side of the support frame (502), and one end of the second adjusting screw (509) is rotatably connected to the storage cylinder (503).

7. A positioning device for CNC machine tool machining according to claim 6, characterized in that, The plug-in fine-tuning component (6) includes a pressing plate (601), which is fixedly installed at the bottom end of the T-shaped rod (504). A plug-in block (602) is fixedly connected to the bottom of the pressing plate (601). One side of the plug-in block (602) is inclined. The top of the L-shaped positioning plate (303) is provided with a plug-in groove (603) corresponding to the plug-in block (602). A storage cavity (604) is provided inside the adjusting column (305). A limiting plate (605) is movably connected inside the storage cavity (604). One end of the connecting rod (304) extends into the storage cavity (604) and is fixedly connected to the limiting plate (605). A limiting spring (606) is fixedly connected between the limiting plate (605) and the inner wall of the storage cavity (604).

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