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CN-121972705-A - Repairing method for bolt via hole

CN121972705ACN 121972705 ACN121972705 ACN 121972705ACN-121972705-A

Abstract

The invention discloses a method for repairing a bolt via hole, which uses a positioning rod on a fixed supporting seat as a positioning reference, completes preliminary coaxial alignment of a drilling machine spindle and the positioning rod by means of clamping a guide rod by a drilling machine tool chuck, lowers a drilling machine spindle box and fixes the fixed supporting seat by a clamp to complete reference positioning, then loosens the tool chuck to lift the spindle box to take down the guide rod, replaces a drill bit matched with a repairing aperture and confirms the coaxiality of the drill bit and the positioning rod again, ensures the drilling reference to be accurate, then sleeves and fixes a wire harness fixing part to be repaired on the positioning rod by a nut column, enables the nut column of the part and the positioning rod to form accurate coaxial positioning, and finally starts the drilling machine to drive the drill bit to axially feed to a hole to be repaired of a bracket, thereby completing the accurate repairing of the circular via hole of the bracket. The invention has the beneficial effects that the coaxiality of the support through hole and the nut post internal thread hole after repairing and the integrity of the nut post thread structure can be ensured.

Inventors

  • LIU QIAN

Assignees

  • 重庆平伟汽车系统有限公司

Dates

Publication Date
20260505
Application Date
20260330

Claims (9)

  1. 1. The repairing method of the bolt via hole is characterized by comprising the following steps of: Step S1, preparing a fixed supporting seat (1) and a guide rod (3), wherein a positioning rod (2) extending upwards to the upper part of the fixed supporting seat (1) is fixedly arranged on the fixed supporting seat (1), the positioning rod (2) is provided with an external thread (21) matched with an internal threaded hole (A11) of a nut column (A1), and the guide rod (3) can be coaxially connected to the upper end of the positioning rod (2) in a detachable mode; S2, fixedly connecting the lower end of the guide rod (3) to the upper end of the positioning rod (2); S3, installing the upper part of the guide rod (3) on a cutter clamp of a drilling machine, synchronously arranging a clamp on a workbench of the drilling machine, reducing the height of a spindle box of the drilling machine, driving a fixed supporting seat (1) to descend, and fixedly clamping the fixed supporting seat (1) on the clamp; Step S4, loosening a cutter chuck of the drilling machine, and lifting the spindle box of the drilling machine to enable the cutter chuck to be upwards far away from the guide rod (3); S5, taking out the guide rod (3) at the upper end of the positioning rod (2); S6, installing a drill bit matched with the repairing aperture in a cutter chuck of the drilling machine, lifting a main shaft box of the drilling machine, and confirming that the drill bit and the positioning rod (2) are positioned on the same axis; S7, installing a wire harness fixing part to be repaired, namely sleeving an internal threaded hole (A11) of a nut column (A1) on an external thread (21) of a positioning rod (2) in a threaded manner, and ensuring that a bracket (A2) faces upwards; and S8, starting the drilling machine, driving the drill bit to feed downwards by the spindle box, and reprocessing the via hole on the bracket (A2) to finish repairing.
  2. 2. The method for repairing a bolt via hole according to claim 1, wherein in the step S1, the fixed support seat (1) is provided with a mounting hole (11) adapted to a positioning rod (2), and the positioning rod (2) is fixedly arranged in the mounting hole (11).
  3. 3. The repairing method of the bolt through hole according to claim 1, wherein the fixed supporting seat (1) is of an inverted L-shaped structure and comprises a transverse block (1 a) and a vertical block (1 b) which is positioned at one end of the transverse block (1 a) and extends downwards, and the positioning rod (2) is arranged on the transverse block (1 a).
  4. 4. The method for repairing bolt through holes according to claim 1, wherein in the step S1, a connecting hole (31) with an open lower end is formed in the guide rod (3), the connecting hole (31) extends along the length direction of the guide rod (3), and the connecting hole (31) is adapted to the upper structure of the positioning rod (2).
  5. 5. The method for repairing a bolt via hole according to claim 4, wherein in the step S1, an internal thread which is matched with the external thread (21) is arranged on the wall of the connecting hole (31).
  6. 6. The method for repairing a bolt via hole according to claim 1, wherein the jig is a vice.
  7. 7. The method for repairing a bolt via hole according to claim 1, wherein in the step S7, a gasket (4) is mounted on the fixed support seat (1), and then the nut post (A1) is screwed on the external thread (21) until the lower end of the nut post (A1) is supported on the gasket (4).
  8. 8. The method for repairing the bolt through hole according to claim 7, wherein the gasket (4) is an annular gasket, the middle of the gasket is provided with an avoidance through hole (41), the gasket (4) is arranged at the position of the fixed supporting seat (1) at the positioning rod (2), and the positioning rod (2) penetrates through the avoidance through hole (41) and extends upwards.
  9. 9. The method for repairing a bolt via according to claim 1, wherein the jig is adjustably mounted on the table by an X-direction linear module and a Y-direction linear module.

Description

Repairing method for bolt via hole Technical Field The invention relates to the technical field of new energy battery boxes, in particular to a repairing method of a bolt via hole. Background Referring to fig. 1, a large number of power harnesses and signal harnesses are arranged inside and outside a new energy battery box a, and a special harness fixing structure is required to be arranged on the battery box in order to ensure that the harnesses are regularly arranged and avoid wear and loosening of the harnesses caused by vehicle driving vibration. Among them, referring to fig. 2 and 3, an integral fixing part formed by welding a nut post A1 with a bracket A2 is one of the harness fixing structures widely used in the industry at present. The use requirement of the fixing part is that a circular through hole A21 formed in a bracket A2 needs to be concentric with an internal threaded hole A11 in the center of a nut column A1 with high precision, and a wire harness can be fixed through the through hole of the bracket through the bolt. However, in the production assembly process of the wire harness fixing part, the nut column and the bracket are connected and fixed by adopting a welding process, and various factors such as thermal deformation, positioning errors of a fixture, manual deviation of welding operation and the like are generated in the welding process, so that the problem that the circular through hole of the bracket and the threaded hole of the nut column are not concentric is easily caused, the unqualified part cannot be directly put into the assembly production of the battery box body, and the position of the circular through hole of the bracket needs to be repaired to be corrected, so that the concentricity precision of the design requirements of the circular through hole of the bracket and the threaded hole of the bracket is restored. At present, the industry lacks special technological means for repairing the parts, and the conventional repairing mode has technical defects which are difficult to overcome. If the drilling correction is carried out from one side of the nut column to the direction of the bracket, the drill bit can directly cut and damage the thread structure in the nut column in the feeding process, so that the thread integrity is lost, and parts are directly scrapped. If from support one side towards the nut post direction processing of driling, because of the accurate central point position of the unable clear observation nut post screw hole of shielding of support, and lack effectual drilling direction location frock, the radial deviation easily takes place for the drill bit in the drilling process, is difficult to guarantee the concentricity of circular via hole after processing and nut post screw hole, and the part after reprocessing still can't satisfy the assembly operation requirement, and the success rate of reprocessing is extremely low. Therefore, it is needed to invent a repair method for bolt via holes to solve the problem that the existing repair method cannot ensure concentricity and thread integrity of the bracket via hole and the nut post threaded hole at the same time. Disclosure of Invention In view of the above, the invention provides a method for repairing a bolt via hole, which can ensure the coaxiality of the repaired bracket via hole and the nut post internal threaded hole and the integrity of the nut post threaded structure. In order to achieve the above purpose, the technical scheme of the invention is as follows: the repairing method of the bolt via hole is characterized by comprising the following steps of: Step S1, preparing a fixed supporting seat and a guide rod, wherein a positioning rod extending upwards to the upper part of the fixed supporting seat is fixedly arranged on the fixed supporting seat, the positioning rod is provided with external threads matched with an internal threaded hole of a nut column, and the guide rod can be coaxially connected to the upper end of the positioning rod in a detachable mode; S2, fixedly connecting the lower end of the guide rod to the upper end of the positioning rod; S3, installing the upper part of the guide rod on a cutter clamp of a drilling machine, synchronously arranging a clamp on a workbench of the drilling machine, reducing the height of a spindle box of the drilling machine, driving a fixed supporting seat to descend, and enabling the fixed supporting seat to be fixedly clamped on the clamp; Step S4, loosening a cutter chuck of the drilling machine, and raising the height of a spindle box of the drilling machine so that the cutter chuck is upwards far away from the guide rod; s5, taking out the guide rod at the upper end of the positioning rod; s6, installing a drill bit matched with the repairing aperture in a cutter chuck of the drilling machine, lifting a main shaft box of the drilling machine, and confirming that the drill bit and the positioning rod are positioned on the same axis; S7, install