CN114749999B

CN114749999B - Distance measuring guide sleeve of automatic feeding drill and use method

Info

Publication number: CN114749999B
Application number: CN202210404361.7A
Authority: CN
Inventors: 韩汪涛; 骆迎昕; 孙小平; 杨力
Original assignee: AVIC Xian Aircraft Industry Group Co Ltd
Current assignee: AVIC Xian Aircraft Industry Group Co Ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2023-06-23
Anticipated expiration: 2042-04-18
Also published as: CN114749999A

Abstract

A distance measuring guide sleeve of an automatic feeding drill and a using method thereof are provided, wherein the distance measuring guide sleeve body is matched with a drill jig hole on a drill plate, the distance measuring guide sleeve is of a cylindrical structure with a shoulder, a central through hole is formed in the center of the distance measuring guide sleeve, the central through hole is matched with a drill bit of the automatic feeding drill, a contact type distance measuring instrument and a digital display meter are connected with the distance measuring guide sleeve, the contact type distance measuring instrument is inlaid on a mounting hole of the guide sleeve body and is parallel to the central through hole, the contact type distance measuring instrument is connected with the digital display meter through a signal wire, the contact type distance measuring instrument comprises a contact type distance measuring probe, a displacement sensor, a telescopic spring and a probe connecting rod which are sequentially connected, the probe connecting rod is relatively fixed with the distance measuring guide sleeve body, the contact type distance measuring probe is directly contacted with the surface of a product, and is extruded by the surface of a front end product to generate displacement. The displacement sensor judges and feeds back the displacement value, and finally, the measurement result can be read out through the indication number on the digital display meter.

Description

Distance measuring guide sleeve of automatic feeding drill and use method

Technical Field

The application relates to the technical field of automatic feeding drill drilling, in particular to a ranging guide sleeve of an automatic feeding drill and a using method.

Background

Hole making, countersinking and fastener installation are the most common technological processes in aircraft assembly links, and are also one of the most important links in aircraft assembly. The quality of hole making and countersinking is the most direct influencing factor influencing the fatigue life of the aircraft body structure. With the increasing promotion of various technical indexes of an airplane, the aerodynamic shape requirement of the airplane is more and more strict, and the quality of the countersink becomes a ring with the highest precision requirement which is the most critical in the airplane assembly process. Usually, the conventional countersunk fastener countersink needs manual operation, and the manual countersink is time-consuming and labor-consuming and has lower precision, and each hole needs to be subjected to pit trial. In particular to a large-aperture countersunk fastener, the manual countersink cannot meet the precision requirement of a modern airplane on the large-aperture countersunk fastener. For a large-aperture countersunk fastener, an automatic feeding drill is usually selected to be matched with a drilling jig for automatic countersink, the automatic countersink precision of the automatic feeding drill is high and is more stable than that of manual countersink, but because the appearance and the thickness of a part have certain processing errors, the position of a countersink cutter point cannot be measured and calibrated in advance when the countersink is fed automatically, the countersink depth of a product is difficult to control, the feeding quantity of a cutter is required to be debugged repeatedly, and the countersink quality and the countersink efficiency are seriously affected. Therefore, an automatic feeding drill contact type distance measuring method suitable for large-aperture countersink is needed to rapidly complete detection work of distance from the end face of the guide sleeve to the surface of a product, and whether the position of a cutter meets countersink requirements is judged according to the measuring result, so that recognition of deformation of a part in a countersink area and subsequent cutter compensation measures are realized.

Disclosure of Invention

In order to meet the actual demands of the aircraft production field, the application aims at providing a ranging guide sleeve of an automatic feeding drill and a using method.

The utility model provides a range finding guide pin bushing of automatic feed drill, characterized by, this range finding guide pin bushing body matches with the drill jig hole on the bushing plate, be a cylindrical structure of taking the convex shoulder, there is central through-hole at the center of range finding guide pin bushing, this central through-hole matches with the drill bit of automatic feed drill, contact range finder and digital display table are connected with range finding guide pin bushing in addition, contact range finder inlays on a mounting hole of guide pin bushing body, this mounting hole is parallel with central through-hole, connect through the signal line between contact range finder and the digital display table, this contact range finder contains contact range finding probe that connects gradually, displacement sensor, expansion spring and probe connecting rod, probe connecting rod and probe connecting rod are relatively fixed, there is expansion spring between displacement sensor's front end fixedly connected with contact range finding probe, displacement sensor and contact range finding probe can do telescopic motion relatively the range finding guide pin bushing, the front end of contact range finding probe stretches out the front end of range finding guide pin bushing body.

The distance that the front end of the contact type distance measuring probe extends out of the front end face of the distance measuring guide sleeve body is larger than the preset detection distance.

The using method of the ranging guide sleeve of the automatic feeding drill is characterized by comprising the following steps: 1) Drilling holes on the surface of a product through a drill plate by using an automatic feeding drill, wherein the theoretical distance between the surface of the drill plate and the surface of the product is known; 2) Installing a ranging guide sleeve on a drilling die hole of a drilling template, enabling the front end of the ranging guide sleeve to be flush with the surface of the drilling template, and guaranteeing the relative position of the ranging guide sleeve and the drilling die hole to be fixed; 3) Actually measuring the deviation value of the actual distance between the surface of the drill plate and the surface of the product and the theoretical distance through a contact ranging probe at the front end of the contact range finder; 4) The displacement sensor transmits the deviation value to the digital display meter for display through a signal line; 5) And adjusting the position parameter of the automatic feed drill according to the deviation value.

The beneficial effects of this application lie in: the contact type distance meter arranged on the distance measuring guide sleeve detects the deviation value of the real-time distance between the drill plate and the surface of the part and the theoretical distance in real time, and the parameter of the tool setting position of the automatic feeding drill is timely adjusted according to the deviation value, so that the problem that the depth of the countersink of the automatic feeding drill is difficult to control due to the thickness error of the part is solved, the operation of repeatedly disassembling the automatic feeding drill from the drill plate and adjusting the position of the tool nose is omitted, and the risk of exceeding the tolerance when the product uses the automatic feeding drill countersink is reduced. The tool is convenient to use and easy to operate, improves the production efficiency of an assembly site, and provides reliable scheme support for subsequent design optimization and process improvement.

The present application is described in further detail below with reference to the drawings of embodiments.

Drawings

FIG. 1 is a schematic view of an automatic feed drill during operation of a contact ranging guide sleeve

Fig. 2 is a schematic structural view of a contact type distance measuring guide sleeve of an automatic feeding drill

Fig. 3 is a schematic structural view of an automatic feeding drill contact type distance measuring device

The numbering in the figures illustrates: 1 product, 2 drill plate, 3 contact ranging probe, 4 displacement sensor, 5 expansion springs, 6 probe connecting rod, 7 ranging guide sleeve and 8 digital display meter

Detailed Description

Referring to the drawings, the ranging guide sleeve of the automatic feeding drill is a cylindrical structure with a shoulder, the center of the ranging guide sleeve is provided with a central through hole, the central through hole is matched with a drill bit of the automatic feeding drill, a contact type distance meter and a digital display meter 8 are connected with the ranging guide sleeve 7, the contact type distance meter is inlaid on a mounting hole of the guide sleeve body and is parallel to the central through hole, the contact type distance meter is connected with the digital display meter 8 through a signal line, the contact type distance meter comprises a contact type ranging probe 3, a displacement sensor 4, a telescopic spring 5 and a probe connecting rod 6 which are sequentially connected, the probe connecting rod 6 is relatively fixed with the ranging guide sleeve 7, the telescopic spring 5 is arranged between the displacement sensor 4 and the probe connecting rod 6, the front end of the displacement sensor 4 is fixedly connected with the contact type ranging probe 3, the displacement sensor 4 and the contact type ranging probe 3 can do telescopic motion relative to the ranging guide sleeve 7, and the front end of the contact type ranging probe 3 extends out of the front end face of the ranging guide sleeve 7 body by a distance of more than 2-3 cm.

The distance measuring guide sleeve of the automatic feeding drill is used for detecting the actual distance between the drill plate and a product and adjusting the tool lifting position of the automatic feeding drill so as to avoid the problem that the depth of a hole-making countersink of the automatic feeding drill is difficult to control due to manufacturing errors, the contact type distance measuring probe is directly contacted with the surface of the product and extruded by the surface of the front-end product to generate displacement, and the displacement sensor judges and feeds back the displacement value and finally reads out the measurement result through the indication on the digital display meter. The specific method comprises the following steps: 1) Drilling a hole countersink on the surface of the product 1 by using an automatic feeding drill through the drill plate 2, and knowing the theoretical distance between the surface of the drill plate 2 and the surface of the product 1; 2) The ranging guide sleeve 7 is arranged on a drilling die hole of the drilling die plate 2, so that the front end of the ranging guide sleeve 7 is flush with the surface of the drilling die plate 2, and the relative position of the ranging guide sleeve 7 and the drilling die hole is ensured to be fixed; 3) The deviation value of the actual distance and the theoretical distance between the surface of the drill plate 2 and the surface of the product 1 is actually measured through a contact ranging probe 3 at the front end of the contact range finder; 4) The displacement sensor transmits the deviation value to the digital display meter 8 for display through a signal line;

5) Finally, the position parameters of the automatic feeding drill are adjusted according to the deviation value, so that the quality of the hole countersink manufactured on the product 1 is ensured.

Claims

1. The utility model provides a range finding guide pin bushing of automatic feed drill, characterized by, this range finding guide pin bushing body matches with the drill jig hole on the bushing plate, be a cylindrical structure of taking the convex shoulder, there is central through-hole at the center of range finding guide pin bushing, this central through-hole matches with the drill bit of automatic feed drill, contact range finder and digital display table are connected with range finding guide pin bushing in addition, contact range finder inlays on a mounting hole of guide pin bushing body, this mounting hole is parallel with central through-hole, connect through the signal line between contact range finder and the digital display table, this contact range finder contains contact range finding probe that connects gradually, displacement sensor, expansion spring and probe connecting rod, probe connecting rod and probe connecting rod are relatively fixed, there is expansion spring between displacement sensor's front end fixedly connected with contact range finding probe, displacement sensor and contact range finding probe can do telescopic motion relatively the range finding guide pin bushing, the front end of contact range finding probe stretches out the front end of range finding guide pin bushing body.

2. The distance measuring guide sleeve of the automatic feeding drill according to claim 1, wherein the distance that the front end of the contact type distance measuring probe extends out of the front end face of the distance measuring guide sleeve body is larger than a preset detection distance.

3. Use of a distance measuring guide sleeve for an automatic feed drill according to claim 1 or 2, characterized in that it comprises the following: 1) Drilling holes on the surface of a product through a drill plate by using an automatic feeding drill, wherein the theoretical distance between the surface of the drill plate and the surface of the product is known; 2) Installing a ranging guide sleeve on a drilling die hole of a drilling die plate, so that the front end of the ranging guide sleeve is flush with the surface of the drilling die plate; 3) Actually measuring the deviation value of the actual distance between the surface of the drill plate and the surface of the product and the theoretical distance through a contact ranging probe at the front end of the contact range finder; 4) The displacement sensor transmits the deviation value to the digital display meter for display through a signal line; 5) And adjusting the position parameter of the automatic feed drill according to the deviation value.