Drilling jig clamp

Abstract

The utility model discloses a drill jig clamp, and belongs to the field of machining. A drill jig clamp comprises a beveled cylindrical drill jig body, the drill jig body is connected with a mandrel, and the other end of the mandrel is provided with a threaded connection portion. A mounting hole corresponding to an inclined groove in a counter bore of the low-pressure rotor is obliquely formed in the diagonal plane of the drill jig body, and a drill bushing is arranged in the mounting hole; screw holes used for installing a handle are symmetrically formed in the two sides of the drill jig body, and the threaded connecting part is matched with a nut to fix the clamp in a counter bore of the low-pressure rotor. The device is used for processing the inclined groove at the counter bore of the flange surface of the low-pressure rotor. According to the utility model, the groove on the counter bore of the low-pressure rotor can be accurately positioned, the accuracy of the machining angle and position is ensured, the stability in the machining process is good, and the surface quality after machining is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of machining in the power energy industry, specifically to a drill jig fixture. Background Technology

[0002] The low-pressure rotor of a steam turbine is one of its core components, and its machining process is extremely challenging. As the "heart" of the steam turbine, the rotor has a decisive impact on the stable operation and power generation efficiency of the turbine. The machining of the rotor faces several technical difficulties, including machining grooves on the special inclined surface of the rotor, high precision requirements, and machining challenges brought about by material properties.

[0003] like Figure 1-2 As shown, the inclined grooves located on the inner side of the countersunk holes on the flange face of the low-pressure rotor present processing challenges due to their non-planar machining and the fact that their number is the same as the number of countersunk holes. During the machining process, it is necessary to ensure the positional accuracy of the inclined grooves and the stability of the machining process to guarantee machining precision and surface quality.

[0004] Therefore, there is an urgent need for a drill jig suitable for machining the oblique groove at the countersunk hole on the inner side of the low-pressure rotor flange. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a drill jig fixture, which can accurately align with the oblique groove position of the countersunk hole on the inner side of the low-pressure rotor flange surface. After fixing, the groove can be processed. The processing process has good stability, high processing accuracy, and good processing quality.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A drill jig fixture includes a beveled cylindrical drill jig body connected to a mandrel, the other end of which is provided with a threaded connection portion; the beveled surface of the drill jig body is provided with mounting holes corresponding to the oblique grooves at the countersunk holes of the low-pressure rotor, and a drill sleeve is provided in the mounting holes; the two sides of the drill jig body are symmetrically provided with screw holes for mounting handles, and the threaded connection portion is used to fix the fixture in the countersunk holes of the low-pressure rotor by cooperating with a nut.

[0008] In a further technical solution, a washer is provided between the threaded connection and the countersunk hole of the low-pressure rotor.

[0009] In a further technical solution, a bushing is provided inside the mounting hole, and a drill sleeve is located inside the bushing.

[0010] In a further technical solution, the fixture also includes a reaming sleeve, which is installed in the mounting hole after the drill bushing is removed.

[0011] In a further technical solution, the drill bushing is fixed to the drill jig body by screws. Beneficial effects

[0012] 1. This utility model can accurately position the groove on the countersunk hole of the low-pressure rotor, ensuring the accuracy of the processing angle and position, and has good stability during processing, resulting in a significant improvement in surface quality after processing.

[0013] 2. This utility model has a simple structure, is easy to install, convenient to operate, and highly practical. Attached Figure Description

[0014] Figure 1 This is a front view of the low-pressure rotor;

[0015] Figure 2 Left view of the low-pressure rotor;

[0016] Figure 3 This is the front view of the present invention (without drill bushing);

[0017] Figure 4 This is a left view of the present invention (without drill sleeve);

[0018] Figure 5 This is a front view of the present invention installed in the countersunk hole of a low-pressure rotor;

[0019] Figure 6 This is a left view of the present invention installed in the countersunk hole of a low-pressure rotor;

[0020] The markings in the diagram are: 1. Drill jig body, 2. Mandrel, 3. Threaded connection, 4. Mounting hole, 5. Drill bushing, 6. Threaded hole, 7. Nut, 8. Washer, 9. Bushing, 10. Screw, 11. Low-pressure rotor, 12. Countersunk hole, 13. Inclined groove, 14. Handle. Detailed Implementation

[0021] The present invention will now be described in detail with reference to embodiments and application examples. It should be noted that the embodiments described are preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. The application and usage of the present invention are not limited to the application examples described. Example

[0022] like Figure 3-6As shown, a drill jig fixture includes a beveled cylindrical drill jig body 1, which is connected to a mandrel 2. The other end of the mandrel 2 is provided with a threaded connection part 3. The beveled surface of the drill jig body 1 is provided with mounting holes 4 corresponding to the oblique grooves 13 at the countersunk holes 12 of the low-pressure rotor 11. A drill sleeve 5 is provided in the mounting holes 4. The drill jig body 1 is provided with threaded holes 6 on both sides for mounting handles 14. The threaded connection part 3 is fixed in the countersunk holes 12 of the low-pressure rotor 11 by cooperating with a nut 7.

[0023] A washer 8 is provided between the threaded connection part 3 and the countersunk hole of the low-pressure rotor. The washer is provided to further ensure that the threaded connection part and the countersunk hole are locked together.

[0024] The mounting hole is also provided with a bushing 9, and the drill sleeve 5 is placed inside the bushing 9 to prevent the drill sleeve from wearing out.

[0025] The fixture also includes a reaming sleeve. After removing the drill bushing, the reaming sleeve is installed in the mounting hole. For example, for a 6cm diameter oblique groove at the countersunk hole of a low-pressure rotor, a 6cm diameter drill can be used directly, or a 5cm diameter drill can be used to drill a small hole first, and then replaced with a 6cm diameter reaming drill (the reaming sleeve needs to be replaced in conjunction with the drill) to further ensure machining quality.

[0026] The drill sleeve 5 is fixed to the drill jig body 1 by screws 10. The screws prevent the drill sleeve from moving during processing, thus further ensuring the processing quality.

[0027] This utility model is used for machining the oblique groove at the countersunk hole of the flange of a low-pressure rotor. The specific working method is as follows:

[0028] 1. After installing the drill sleeve or reamer in the mounting hole, tighten it with screws;

[0029] 2. Insert the mandrel into the countersunk hole of the low-pressure rotor flange to achieve positioning, and turn the handle to adjust the position of the mounting hole on the drill jig body so that it is aligned with the inclined groove at the countersunk hole of the low-pressure rotor flange.

[0030] 3. The threaded connection protrudes from the countersunk hole of the flange and is located outside the countersunk hole. The drill jig is fixed on the low-pressure rotor by the cooperation of the washer and nut with the threaded connection, so that the inclined groove can be processed.

Claims

1. A drill jig fixture, characterized in that, The device includes a beveled cylindrical drill jig body connected to a mandrel, the other end of which is provided with a threaded connection. The beveled surface of the drill jig body is provided with mounting holes corresponding to the oblique grooves at the countersunk holes of the low-pressure rotor, and a drill sleeve is provided in the mounting holes. The drill jig body is provided with symmetrical threaded holes for mounting handles on both sides. The threaded connection is used to fix the clamp in the countersunk holes of the low-pressure rotor by cooperating with a nut.

2. The drill jig fixture according to claim 1, characterized in that, A washer is provided between the threaded connection and the countersunk hole of the low-pressure rotor.

3. The drill jig fixture according to claim 1, characterized in that, The mounting hole is also provided with a bushing, and the drill sleeve is located inside the bushing.

4. The drill jig fixture according to claim 1, characterized in that, It also includes a reamer; after the drill bushing is removed, the reamer is installed in the mounting hole.

5. The drill jig fixture according to claim 1, characterized in that, The drill bushing is fixed to the drill jig body by screws.

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