A device for quickly detecting the parallelism of the center line of a mortise slot hole

Abstract

The utility model discloses a kind of device for quickly detecting tenon groove groove bottom hole center line parallelism in the technical field of machining detection, including positioning clamping device and measuring device, the positioning clamping device includes the positioning block with tenon tooth shape end, and tenon tooth shape end is inserted into the tenon groove beside the measured hole, the upper end surface of the positioning block is equipped with baffle, the side surface of the positioning block is opened and hole is slidably fitted with top block, the measuring device includes the positioning plate of leaning on tenon groove end surface at measured hole, the side surface of the positioning block is equipped with the plane of slidingly conforming with positioning plate, and the plane is parallel with the axis of measured hole, the lower end surface of the positioning plate is sequentially equipped with lever support, lever stop screw, screw and dial gauge along the plane where the axis of measured hole is located. The utility model measures hole center line parallelism actual value quickly and accurately on machine tool, improves production efficiency, shortens part manufacturing cycle, reduces part manufacturing cost.

Description

Technical Field

[0001] This utility model relates to a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, belonging to the field of mechanical processing and testing technology. Background Technology

[0002] High-pressure turbine disks are a very important type of part in aero-engines, playing a key role in the overall performance of engine assembly. According to design requirements, 84 radial holes were machined at the bottom of the 84 tenon grooves on the high-pressure turbine disk, requiring the center line of the hole to be parallel to the end face of the tenon groove to be 0.3.

[0003] In existing technologies, because the hole being measured is connected to another hole through the symmetry center of the tenon groove, the hole length is short and incomplete. It can be inspected using a coordinate measuring machine, but the part being measured needs to be moved back and forth, resulting in long periods of ineffective work, low inspection efficiency, and the inability to measure on a machine tool. This reduces production efficiency and increases product processing costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for quickly detecting the parallelism of the center line of the bottom hole of the tenon groove. By quickly and accurately measuring the actual value of the parallelism of the hole center line on the machine tool, production efficiency is improved, the manufacturing cycle of parts is shortened, and the manufacturing cost of parts is reduced.

[0005] To achieve the above objectives, this utility model employs the following technical solution:

[0006] In a first aspect, this utility model provides a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, including a positioning clamping device and a measuring device. The positioning clamping device includes a positioning block with a tenon-shaped end, and the tenon-shaped end is inserted into the tenon groove next to the hole to be measured. A baffle is installed on the upper end face of the positioning block. The side of the positioning block has an opening and a top block is slidably fitted inside the opening. The measuring device includes a positioning plate that rests against the end face of the tenon groove at the hole to be measured. The side of the positioning block has a plane that slides and fits against the positioning plate, and this plane is parallel to the axis of the hole to be measured. A lever support, a lever stop screw, a screw, and a dial indicator are sequentially installed on the lower end face of the positioning plate along the plane where the axis of the hole to be measured is located. The lever support is mounted with a lever through a shaft pin. Ball contacts and flat contacts are respectively installed at both ends of the lever. The ball contacts are in contact with the generatrix of the hole to be measured on the part, and the flat contacts are in contact with the dial indicator. The screw and the lever are connected by a tension spring.

[0007] Furthermore, the positioning plate has an opening on its surface, and a dial indicator is installed in the opening through a sliding bushing. The positioning plate also has a threaded hole on its side, and a dial indicator clamping screw is screwed into the threaded hole to tighten the dial indicator.

[0008] Furthermore, the lever has holes at both ends, the ball contact is tightly fitted with the hole on the left side of the lever, and the flat contact is tightly fitted with the hole on the right side of the lever.

[0009] Furthermore, the distance between the ball contact and the flat contact and the pivot pin is equal.

[0010] Furthermore, the baffle is mounted on the upper end face of the positioning block by hexagonal socket screws.

[0011] Furthermore, the positioning block is embedded with an adjusting screw, and the adjusting screw is threadedly connected to the top block.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0013] This solution improves production efficiency, shortens the parts manufacturing cycle, and reduces parts manufacturing costs by quickly and accurately measuring the actual value of hole centerline parallelism on machine tools. The testing device uses a positioning block to align the tenon groove position of the part with a plane parallel to the axis of the measured hole. The positioning plate slides along the side of the positioning block, ensuring that the ball contact does not deviate from the generatrix of the measured hole during the measurement process, thus achieving accurate measurement. This testing device can be promoted and applied in the position detection of other elements of the tenon groove in high-pressure turbine disks of various aero-engine models. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 A left front view of a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, provided in an embodiment of this utility model;

[0016] Figure 2 A right front view of a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, provided in an embodiment of this utility model;

[0017] Figure 3 A top view of a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, provided in an embodiment of this utility model;

[0018] Figure 4 Left view of a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, provided in an embodiment of this utility model;

[0019] Figure 5 A front view of a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, provided in an embodiment of this utility model;

[0020] Figure 6Rear view of a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove, provided in an embodiment of this utility model;

[0021] In the diagram: 1. Positioning plate; 2. Lever; 3. Lever support; 4. Positioning block; 5. Baffle; 6. Top block; 7. Adjusting screw; 8. Screw; 9. Socket head cap screw; 10. Dial gauge clip screw; 11. Lever stop screw; 12. Tension spring; 13. Ball contact; 14. Flat contact; 15. Shaft pin; 16. Bushing; 17. Dial gauge. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0023] The following detailed description is exemplary and intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this invention.

[0024] Example:

[0025] Please see Figures 1 to 6 This embodiment discloses a device for quickly detecting the parallelism of the center line of the bottom hole of a tenon groove. The overall structure includes a positioning and clamping device and a measuring device, wherein:

[0026] The positioning and clamping device mainly consists of a positioning block 4, a baffle 5, a top block 6, an adjusting screw 7, and an internal hexagon screw 9. The positioning and clamping device takes the positioning block 4 as the main component. The baffle 5 is installed on the upper end face of the positioning block 4 through the internal hexagon screw 9. The top block 6 is slidably fitted with the hole of the positioning block 4 and is connected to the adjusting screw 7 by threads. The positioning block 4 has a tenon-shaped end, and the end is inserted into the tenon groove next to the hole to be measured. Its four dimensional surfaces are in contact with the four pressure surfaces of the tenon groove of the part. The top block 6 is used to tighten the non-working surface of the tenon groove, so that the radial position of the positioning block 4 is fixed. A baffle 5 is installed on the end face of the positioning block 4. The baffle 5 is in contact with the end face of the tenon groove, so that the position of the positioning block 4 is completely fixed in the tenon groove. The function of the positioning and clamping device is to insert the positioning block 4 into the tenon groove next to the hole to be measured, tighten it, and then lead the tenon groove of the part to the outside, providing a reliable positioning reference surface for the measuring device.

[0027] The measuring device mainly consists of a positioning plate 1, a lever 2, a lever support 3, a screw 8, a dial indicator clamp screw 10, a lever stop screw 11, a tension spring 12, a ball contact 13, a flat contact 14, a shaft pin 15, a bushing 16, and a dial indicator 17. The positioning plate 1 is the main component of the measuring device. The lever support 3, screw 8, lever stop screw 11, and bushing 16 are installed at corresponding positions on the lower end face of the positioning plate 1. A reference plane is designed on the side of the positioning block 4, which is parallel to the axis of the hole being measured. The positioning plate 1... The side of the lever 2 is flush with the plane and can slide along the plane. The lever 2 is installed between the slots of the lever support 3, and the pin 15 is inserted into the hole to connect the two parts. The lever 2 can rotate flexibly around the pin 15. The upper surface of the positioning plate 1 rests against the tenon end face of the hole to be measured. Utilizing the detection principle of the lever, the left side of the lever 2 is equipped with a ball contact 13, which contacts the generatrix of the hole to be measured. The right side of the lever 2 is equipped with a flat contact 14, which is flush with the dial indicator 17. The ball contact 13 and the flat contact 14 are equidistant from the pin 15. The lever 2 is placed between the slots of the lever support 3 and can rotate flexibly around the pin 15. When the positioning plate 1 slides along the side of the positioning block 4, the ball contact 13 slides along the generatrix of the hole to be measured. Through the lever, the dial indicator reading is the parallelism error between the hole to be measured and the tenon end face.

[0028] It should be noted that the ball contact 13 is tightly fitted with the left hole of the lever 2, and the flat contact 14 is tightly fitted with the right hole of the lever 2; the tension spring 12 is installed between the screw 8 and the lever 2, and applies measuring force during measurement; the lever stop screw 11 prevents the lever from rotating too much when not measuring, which would cause excessive compression of the dial indicator. The bushing 16 is slidably fitted with the hole of the positioning plate 1, and the dial indicator 17 is slidably fitted with the hole of the bushing 16. The clamping screw 10 tightens the bushing 16 through the threaded hole on the positioning plate 1. The threaded hole tightens the bushing 16 as an open bushing, and after deformation, it clamps the dial indicator 17. The function of the measuring device is to move the positioning plate 1 along the reference surface provided by the positioning and clamping device, so that the ball contact 13 always slides along the generatrix of the measured hole. Through the lever, the dial indicator reading is the parallelism error between the measured hole and the tenon end face, thereby achieving the purpose of accurate measurement.

[0029] During testing, the positioning block 4 is first inserted into the tenon groove next to the hole to be tested, and then the positioning block 4 is completely fixed by adjusting the screw 7 and the top block 6. The operator pushes the positioning plate 1, causing the testing device to move radially along the side of the positioning block 4 and the end face of the tenon groove of the part. The ball contact 13 always slides along the generatrix of the hole to be tested, and the reading of the dial indicator is the parallelism error between the hole to be tested and the end face of the tenon groove, transmitted through a lever. This device has high operational stability during testing and can achieve fast and accurate measurement.

[0030] This solution can replace a coordinate measuring machine (CMM) to quickly and accurately measure the actual value of hole centerline parallelism on a machine tool, improving production efficiency, shortening the part manufacturing cycle, and reducing part manufacturing costs. The testing device uses a positioning block 4 to transfer the position of the tenon groove of the part to a plane parallel to the axis of the hole being measured. The positioning plate 1 slides along the side of the positioning block 4, ensuring that the ball contact 13 never deviates from the generatrix of the hole being measured during the measurement process, achieving accurate measurement. This testing device can be promoted and applied in the position detection of other elements of the tenon groove in high-pressure turbine disks of various aero-engine models.

[0031] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A device for rapidly detecting the parallelism of the center line of the bottom hole of a tenon groove, characterized in that, The device includes a positioning clamping device and a measuring device. The positioning clamping device includes a positioning block (4) with a tenon-shaped end, the tenon-shaped end being inserted into a mortise next to the hole to be measured. A baffle (5) is installed on the upper end face of the positioning block (4). The side of the positioning block (4) has an opening, and a top block (6) is slidably fitted inside the opening. The measuring device includes a positioning plate (1) supported on the end face of the mortise at the hole to be measured. The side of the positioning block (4) has a plane that slides and fits against the positioning plate (1), and this plane is parallel to the axis of the hole to be measured. A lever support (3), a lever stop screw (11), a screw (8), and a dial indicator (17) are sequentially installed on the lower end face of the plate (1) along the plane where the axis of the hole to be measured is located. The lever support (3) is equipped with a lever (2) through a shaft pin (15). A ball contact (13) and a flat contact (14) are respectively installed at both ends of the lever (2). The ball contact (13) is in contact with the generatrix of the hole to be measured on the part, and the flat contact (14) is in contact with the dial indicator (17). The screw (8) is connected to the lever (2) through a tension spring (12).

2. The device for rapidly detecting the parallelism of the center line of the bottom hole of the tenon groove according to claim 1, characterized in that, The positioning plate (1) has an opening on its surface and a dial indicator (17) is installed in the opening through a sliding bushing (16). The positioning plate (1) has a threaded hole on its side and a dial indicator clamping screw (10) is screwed into the threaded hole to tighten the dial indicator (17).

3. The device for rapidly detecting the parallelism of the center line of the bottom hole of the tenon groove according to claim 1, characterized in that, The lever (2) has holes at both ends. The ball contact (13) is tightly fitted with the left hole of the lever (2), and the flat contact (14) is tightly fitted with the right hole of the lever (2).

4. The device for rapidly detecting the parallelism of the center line of the bottom hole of the tenon groove according to claim 1, characterized in that, The ball contact (13) and the flat contact (14) are equidistant from the pivot pin (15).

5. The device for rapidly detecting the parallelism of the center line of the bottom hole of a tenon groove according to claim 1, characterized in that, The baffle (5) is installed on the upper end face of the positioning block (4) by an internal hex screw (9).

6. The device for rapidly detecting the parallelism of the center line of the bottom hole of the tenon groove according to claim 1, characterized in that, The positioning block (4) is embedded with an adjusting screw (7) and the adjusting screw (7) is threadedly connected to the top block (6).

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