CN-116652238-B - Waist-shaped hole drilling method for oversized component in limited space

CN116652238BCN 116652238 BCN116652238 BCN 116652238BCN-116652238-B

Abstract

The invention discloses a kidney-shaped hole drilling method for oversized components in a limited space, which comprises the following steps of S1, port matching and clearance control between two components, S2, preparing a drilling template, S3, installing the drilling template, S4, drilling kidney-shaped holes positioned diagonally on the two components, S5, repeating the steps S3 and S4, drilling kidney-shaped holes at web positions, S6, repeating the steps S3 to S5, drilling kidney-shaped holes at top plate positions, S7, repeating the steps S3 to S5, and drilling kidney-shaped holes at bottom plate positions. The invention ensures the forming size of the hole group and solves the problems of out-of-tolerance perpendicularity and unstable size of the holes.

Inventors

JI FUQIANG
SHI LINJUN
ZHOU WEI
XU JINMING
ZHOU BO

Assignees

上海振华重工(集团)股份有限公司
南通振华重型装备制造有限公司

Dates

Publication Date: 20260508
Application Date: 20230717

Claims (5)

1. The kidney-shaped hole drilling method of the oversized component in the limited space is characterized by comprising the following steps of: s1, port matching and clearance control between two members are specifically as follows: when the two members are matched, a welding line with the length of 100mm is reserved at the end part of one member, the welding is not performed, after the welding line on the other member is completely completed, the dislocation of the two members is adjusted, The misalignment between the two members is within +/-1 mm; The two members are of I-steel structures, one end of the drill plate is arranged on the member (1), and the other end of the drill plate is arranged on the member (2); s2, preparing a drilling template, The center positioning error of any two kidney-shaped holes in the drill jig plate upper hole group is within +/-1 mm; the tolerance of the long axis and the short axis of the kidney-shaped hole on the drill jig plate is within 0-0.03 mm; a drill bushing is arranged on the edge of the kidney-shaped hole of the drill plate; the tolerance of the long shaft and the short shaft of the outer ring of the drill sleeve is within 0.01-0.03 mm, and the tolerance of the long shaft and the short shaft of the inner ring is within 0.1-0.35 mm; The drill bushing is arranged in a left-right asymmetric mode, the left long shaft size is L/2+0.2mm, the right long shaft size is L/2+0.3mm, and L is the theoretical value of the long shaft; s3, installing the drill plate, which comprises the following steps: drilling four positioning round holes on two members, and setting a datum line according to the hole groups; The diameter of the positioning round hole is smaller than the short axis size of the kidney-shaped hole on the drill jig plate; the drilling template is fixed by screwing bolts into the positioning round holes, and when the drilling template is fixed, the notch of the drilling template is aligned with the datum line; S4, drilling kidney-shaped holes positioned diagonally on the two members in a matched mode, and specifically comprising the following steps of: Drilling four diagonal positioning waist holes on two members, and installing waist-shaped positioning pins; The magnetic suction drill is used for firstly drilling a round hole on one side of a long shaft of the positioning waist hole without drilling through, then drilling a round hole on the other side of the long shaft of the positioning waist hole, and finally drilling through the round hole on one side of the long shaft of the positioning waist hole; positioning the drill plate by using kidney-shaped punching nails; S5, repeating the steps S3 and S4, and matching with waist-shaped holes at the web plate position; s6, repeating the steps S3 to S5, and drilling kidney-shaped holes in the top plate; s7, repeating the steps S3 to S5, and drilling kidney-shaped holes in the bottom plate.
2. The kidney-shaped hole drilling method for oversized members in a confined space of claim 1 wherein, in step S2, The flatness of the drill plate is 1mm/m.
3. The kidney hole drilling method for oversized members in a confined space of claim 2 wherein the edges of the drill plate are provided with notches.
4. The kidney-shaped hole drilling method for oversized members in a confined space according to claim 1, wherein the step S5 is specifically as follows: Drilling holes on the drill jig plate from the middle to two sides in sequence; And (4) plugging the positioning round hole by using a plug, and repeating the step S4 to drill holes.
5. The kidney-shaped hole drilling method for oversized members in a confined space according to claim 4, wherein the step S7 is specifically as follows: Firstly, a circular positioning hole is drilled below the bottom plate, and then the drill jig plate is installed on the upper portion of the top plate according to the circular positioning hole.

Description

Waist-shaped hole drilling method for oversized component in limited space Technical Field The invention relates to an assembly technology of an oversized component, in particular to a kidney-shaped hole drilling method of the oversized component in a limited space. Background In order to accelerate the construction speed, along with the development of technology, the assembled building has become the mainstream of construction gradually, and high-strength bolts also have the characteristics of high strength, convenient installation and the like, and are widely used in the assembled building, so that in order to facilitate the installation and adjustment of on-site bolts, the matching performance is improved, and the bolt installation holes are required to be made into kidney-shaped holes. With the increasing demands for kidney-shaped holes. The traditional kidney-shaped hole is machined by adopting a numerical control machining center method, but the machining equipment cannot meet the machining requirements of all components due to limiting factors such as component size, equipment specification and machining sites, and can only machine holes by adopting portable equipment such as a magnetic suction drill under limited space. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a waist-shaped hole drilling method of an oversized component in a limited space, ensure the forming size of a hole group and solve the problems of out-of-tolerance and unstable size of the perpendicularity of holes. In order to achieve the above purpose, the invention adopts the following technical scheme: a kidney-shaped hole drilling method of an oversized component in a limited space comprises the following steps: S1, port matching and clearance control between two members; s2, preparing a drilling template; s3, installing the drill plate; S4, drilling kidney-shaped holes positioned diagonally on the two members in a matched mode; S5, repeating the steps S3 and S4, and matching with waist-shaped holes at the web plate position; s6, repeating the steps S3 to S5, and drilling kidney-shaped holes in the top plate; s7, repeating the steps S3 to S5, and drilling kidney-shaped holes in the bottom plate. Preferably, the step S1 specifically includes the following steps: when the two members are matched, a welding line with the length of 100mm is reserved at the end part of one member, welding is not performed, and after the welding line on the other member is completely completed, dislocation of the two members is adjusted. Preferably, the misalignment between the two members is within + -1 mm. Preferably, in the step S2, a center positioning error of any two kidney-shaped holes in the hole group on the drill plate is within ±1 mm; The flatness of the drill plate is 1mm/m. Preferably, the edge of the drill plate is provided with a notch; the tolerance of the long axis and the short axis of the kidney-shaped hole on the drill jig plate is within 0-0.03 mm. Preferably, a drill sleeve is arranged on the edge of the kidney-shaped hole of the drill plate; the tolerance of the long shaft and the short shaft of the outer ring of the drill sleeve is within 0.01-0.03 mm, and the tolerance of the long shaft and the short shaft of the inner ring is within 0.1-0.35 mm; The drill sleeve is arranged in a left-right asymmetric mode, the left long shaft size is L/2+0.2mm, and the right long shaft size is L/2+0.3mm; L is the theoretical value of the long axis. Preferably, the step S3 specifically includes the following steps: drilling four positioning round holes on two members, and setting a datum line according to the hole groups; The diameter of the positioning round hole is smaller than the short axis size of the kidney-shaped hole on the drill jig plate; and the drill plate is fixed by screwing the bolts into the positioning round holes, and when the drill plate is fixed, the notch of the drill plate is aligned with the datum line. Preferably, the step S4 is specifically as follows: Drilling four diagonal positioning waist holes on two members, and installing waist-shaped positioning pins; The magnetic suction drill is used for firstly drilling a round hole on one side of a long shaft of the positioning waist hole without drilling through, then drilling a round hole on the other side of the long shaft of the positioning waist hole, and finally drilling through the round hole on one side of the long shaft of the positioning waist hole; positioning the drill plate by using kidney-shaped punching nails. Preferably, the step S5 specifically includes the following steps: Drilling holes on the drill jig plate from the middle to two sides in sequence; And (4) plugging the positioning round hole by using a plug, and repeating the step S4 to drill holes. Preferably, the step S7 specifically includes the following steps: Firstly, a circular positioning hole is drilled below the bottom plate, and then the drill jig p