Threaded hole bad tooth repairing tool

Abstract

A threaded hole bad tooth repairing tool comprises a guiding screw tap, a repairing screw tap and an abutting and supporting pull rod, the repairing screw tap comprises a plurality of repairing units, and the repairing units are clamped to the end of the guiding screw tap in the circumferential direction at intervals; the abutting and supporting pull rod penetrates through the guiding screw tap and the repairing screw tap at the same time and comprises an abutting and supporting end, the abutting and supporting end abuts against the multiple repairing units at the same time, and the abutting and supporting pull rod pulls the multiple repairing units to drive the multiple repairing units to expand outwards at the same time. In-situ repair of the damaged threaded hole of the water-turbine generator set can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of thread repair, especially relates to a thread hole bad tooth repair frock. BACKGROUND

[0002] When the water turbine generator unit is overhauled, some bolt holes need to be repaired after the thread damage, and the economic benefit is low and time and labor are consumed only because the water turbine generator unit is disassembled due to the thread hole damage.

[0003] Because the required matching frock is not needed, the thread hole is directly repaired on the water turbine generator unit, the thread repair is very difficult, and the thread can be further damaged, leading to the bolt scrap. INVENTION CONTENTS

[0004] The utility model provides a thread hole bad tooth repair frock to solve the problem of water turbine generator unit thread hole repair.

[0005] To solve the above technical problem, the technical scheme adopted by the utility model is:

[0006] A thread hole bad tooth repair frock, comprising a guide tap, a repair tap and a supporting pull rod, the repair tap comprises a plurality of repair units, and the plurality of repair units are peripherally clamped at the end of the guide tap at intervals;

[0007] The supporting pull rod penetrates the guide tap and the repair tap simultaneously, the supporting pull rod comprises a supporting end, the supporting end abuts against the plurality of repair units simultaneously, and the supporting pull rod can drive the plurality of repair units to expand outward simultaneously when being pulled.

[0008] Further, a magnetic guide sleeve for being installed to the surface of a workpiece to be repaired is further included, and the center of the through hole in the magnetic guide sleeve is coaxially arranged with the center of the thread hole to be repaired.

[0009] Further, the end of the guide tap away from the repair tap is fixed with a mounting block, and the mounting block is externally connected with a driving motor for driving the mounting block to rotate.

[0010] Further, the maximum outer diameter of the repair tap in the original state is smaller than the hole diameter of the thread hole to be repaired.

[0011] Further, the side wall of the supporting end abutting against the repair unit is in an inclined shape, and the thickness of the supporting end gradually increases in the direction away from the guide tap.

[0012] Further, the guide tap comprises a main body and a plurality of guide blocks fixed to the end of the main body, the guide blocks are arranged between two adjacent repair units, and the side wall of the guide block is in abutment with the side wall of the supporting end and the side wall of the repair unit.

[0013] Further, the end face of the main body fixed with the guide blocks is provided with a sliding groove opening towards the center of the guide tap.

[0014] Further, the side wall of the main body is provided with a plurality of slag discharge grooves opening along the axis direction of the main body, and the slag discharge grooves are in communication with the area between two adjacent repair units.

[0015] The utility model can achieve the following beneficial effects:

[0016] The repair tool of the application realizes guidance by a magnetic guide sleeve, cooperates positioning by a guide tap, adjusts and adapts by a supporting pull rod, and realizes the working mode of repair by a repair tap, and is suitable for in-situ repair of middle and large size thread tooth defects; the tool has simple configuration, fast operation, can quickly realize thread positioning and defect repair, and can adjust the repair outer diameter of the repair tap by adjusting the position of the supporting pull rod, thereby adapting to thread hole repair of different diameters, and has high applicability. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and embodiments:

[0018] Fig. 1 It is a sectional view schematic diagram of the utility model thread hole tooth defect repair tool;

[0019] Fig. 2 It is a whole structure schematic diagram of the utility model thread hole tooth defect repair tool;

[0020] Fig. 3 It is a local structure schematic diagram for showing the structure of the guide tap, the supporting pull rod and the repair tap of the utility model;

[0021] Fig. 4 It is a local structure schematic diagram for showing the connection of the magnetic guide sleeve and the guide tap of the utility model.

[0022] In the drawings, the component list represented by each sign is as follows:

[0023] 1, guide tap; 11, main body; 111, sliding groove; 112, slag discharge groove; 12, guide block; 2, repair tap; 21, repair unit; 3, supporting pull rod; 31, supporting end; 32, rod body; 4, magnetic guide sleeve; 5, mounting block;

[0024] 100. Workpiece to be repaired. Detailed Implementation

[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0026] like Figs. 1 to 4 As shown, a tooling for repairing damaged threads in a threaded hole includes a magnetic guide sleeve 4, a guide tap 1, a repair tap 2, and a support rod 3. The magnetic guide sleeve 4 is used to adhere to the surface of the workpiece 100 to be repaired, and guides the guide tap 1 and the repair tap 2 as they extend into the threaded hole to repair the damaged threads. The repair tap 2 is engaged with the guide tap 1 to repair the damaged threads in the threaded hole. The support rod 3 passes through the guide tap 1 and the repair tap 2, with both ends extending outwards, and is used to drive the repair tap 2 to expand outwards, thereby engaging the repair tap 2 with the threaded hole.

[0027] Specifically, the magnetic guide sleeve 4 is adsorbed onto the surface of the workpiece 100 to be repaired, and the center of the through hole inside the magnetic guide sleeve 4 is coaxially set with the center of the threaded hole to be repaired. The through hole in the middle of the magnetic guide sleeve 4 matches the size of the guide tap 1, so that when the guide tap 1 and the repair tap 2 are inserted into the threaded hole to be repaired, they are not easily misaligned.

[0028] The guide tap 1 includes a main body 11 and multiple guide blocks 12 fixed to the end of the main body 11. The guide tap 1 provides a fixing point for the repair tap 2, facilitating the adjustment of the position of the repair tap 2. The repair tap 2 includes several repair units 21. In this embodiment, four repair units 21 are provided. The four repair units 21 are circumferentially spaced and engaged with the periphery of the guide tap 1. Specifically, each repair unit 21 is disposed between two adjacent guide blocks 12, and the repair unit 21 abuts against the side wall of the guide block 12. This allows the repair unit 21 to be engaged between two adjacent guide blocks 12 while also being able to move relative to the guide blocks 12.

[0029] Furthermore, the end face of the fixed guide block 12 of the main body 11 is provided with multiple sliding grooves 111 in the direction close to the center of the guide tap 1. The repair unit 21 is partially engaged in the sliding groove 111 and can slide along the sliding groove 111. The sliding groove 111 can guide and limit the movement of the repair unit 21.

[0030] The supporting pull rod 3 comprises a rod body 32 and a supporting end 31 located at the end of the rod body 32, the supporting end 31 partially extends out of the guide tap 1 and partially locates in the guide tap 1, and the rod body 32 extends out of the guide tap 1 from the end of the guide tap 1 away from the guide block 12. The side wall of the supporting end 31 is in abutment with the surface of the plurality of repair units 21, and the side wall of the supporting end 31 in abutment with the repair units 21 is in an inclined shape, specifically, the thickness of the supporting end 31 gradually increases in the direction away from the guide tap 1, and then when the supporting pull rod 3 is pulled, the plurality of repair units 21 can be pushed outwardly by the inclined surface of the supporting end 31.

[0031] When the repair tap 2 is in the original state, the maximum outer diameter of the repair tap 2 is smaller than the hole diameter of the thread hole to be repaired, at this time, the repair tap 2 can be placed in the thread hole more smoothly, after the repair tap 2 is moved to the damaged tooth in the thread hole, the supporting pull rod 3 is pulled backward, the supporting end 31 pushes the repair unit 21 outwardly to expand until the repair tap 2 is engaged with the thread hole, at this time, rotating the repair tap 2 can realize the repair of the damaged tooth in the thread hole.

[0032] Further, the end face of the guide tap 1 away from the repair tap 2 is fixed with a mounting block 5, the mounting block 5 is connected with a driving motor for driving the mounting block 5 to rotate, the mounting block 5 is driven to rotate by the driving motor to drive the repair tap 2 to rotate, which is more convenient and fast.

[0033] In addition, a plurality of slag discharge grooves 112 are also provided in the side wall of the main body 11 along the axis direction of the main body 11, and the slag discharge grooves 112 are in communication with the area between the adjacent two repair units 21. During the repair of the damaged thread by the repair tap 2, iron filings or other sundries will be generated, and the iron filings can fall into the slag discharge grooves 112 by setting the slag discharge grooves 112, and the inner wall of the slag discharge grooves 112 can be provided with magnetic material to enable the iron filings to be adsorbed on the surface of the slag discharge grooves 112, so as to prevent the iron filings from accumulating in the thread hole and affecting the repair of the damaged tooth in the thread hole.

[0034] The repair steps of the thread hole damaged tooth repair tool include:

[0035] S1: placing the magnetic guide sleeve 4, adjusting the supporting pull rod 3 to make the repair tap 2 contract, and then the repair tap 2 can be placed in the thread hole to be repaired;

[0036] S2: pulling the supporting pull rod 3, pushing the repair unit 21 outwardly by the supporting end 31, until the repair tap 2 is in perfect thread cooperation with the thread hole, and rotating the tool;

[0037] S3: continuing to rotate the repair tap 2 to repair the damaged part until completely passing through the damaged part, and then withdrawing the tool after completing the repair.

[0038] S4: During the repair process, iron filings fall into the slag channel 112 and are adsorbed on the surface of the slag channel 112, and the tool is pushed out and then the iron filings are cleaned.

[0039] The thread hole bad tooth repair tool can realize in-situ repair of the thread hole bad tooth, can adjust the repair tap 2 according to different thread hole diameters, and can realize in-situ repair of the thread hole bad tooth of a large equipment without disassembling components, and has the advantages of simple operation, strong applicability and simple structure.

[0040] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A tooling for repairing damaged threads in a threaded hole, characterized in that: It includes a guide tap (1), a repair tap (2) and a support rod (3). The repair tap (2) includes several repair units (21), and the multiple repair units (21) are circumferentially engaged with the end of the guide tap (1) at intervals. The support rod (3) passes through both the guide tap (1) and the repair tap (2). The support rod (3) includes a support end (31), which simultaneously abuts against multiple repair units (21). Pulling the support rod (3) can drive multiple repair units (21) to expand outward simultaneously.

2. The tooling for repairing damaged threads in a threaded hole according to claim 1, characterized in that: It also includes a magnetic guide sleeve (4) for mounting onto the surface of the workpiece (100) to be repaired, wherein the center of the through hole inside the magnetic guide sleeve (4) is coaxially arranged with the center of the threaded hole to be repaired.

3. The tooling for repairing damaged threads in a threaded hole according to claim 1, characterized in that: The guide tap (1) is fixed with a mounting block (5) at one end away from the repair tap (2), and a drive motor for driving the mounting block (5) to rotate is externally connected to the mounting block (5).

4. The tooling for repairing damaged threads in a threaded hole according to claim 1, characterized in that: When the repair tap (2) is in its original state, its maximum outer diameter is smaller than the diameter of the threaded hole to be repaired.

5. The tooling for repairing damaged threads in a threaded hole according to claim 1, characterized in that: The sidewall of the support end (31) that is in contact with the repair unit (21) is inclined, and the thickness of the support end (31) gradually increases in the direction away from the guide tap (1).

6. The tooling for repairing damaged threads in a threaded hole according to claim 1, characterized in that: The guide tap (1) includes a main body (11) and multiple guide blocks (12) fixed to the end of the main body (11). The guide blocks (12) are disposed between two adjacent repair units (21), and the side wall of the guide block (12) abuts against the side wall of the supporting end (31) and the side wall of the repair unit (21).

7. The tooling for repairing damaged threads in a threaded hole according to claim 6, characterized in that: The main body (11) has a sliding groove (111) on the end face of the guide block (12) facing the center of the guide tap (1). The repair unit (21) is partially engaged in the sliding groove (111) and slides along the sliding groove (111).

8. The tooling for repairing damaged threads in a threaded hole according to claim 6, characterized in that: The sidewall of the main body (11) has multiple slag discharge channels (112) along the axis of the main body (11), and the slag discharge channels (112) are connected to the area between two adjacent repair units (21).

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