CN111015366B

CN111015366B - Laser detection device and method for machining allowance of inner cavity of complex box

Info

Publication number: CN111015366B
Application number: CN201911307628.5A
Authority: CN
Inventors: 岳锋; 张建强; 孟庆力; 于庆峰; 杨成杰; 郭明举; 李志俊; 王俊; 张新乐; 宋艳
Original assignee: Inner Mongolia First Machinery Group Corp
Current assignee: Inner Mongolia First Machinery Group Corp
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2021-09-28
Anticipated expiration: 2039-12-18
Also published as: CN111015366A

Abstract

The invention relates to a laser detection device and a laser detection method for machining allowance of an inner cavity of a complex box body, wherein the detection device mainly comprises a handheld detection marking gauge, a laser projection device, a measurement rod and a connecting ring; the invention is mainly used for detecting the machining allowance of the inner cavity hole system of the box type part and the internal dimension of a large structural member, and particularly solves the problem that the dimension of a contour surface is difficult to detect by a conventional method. In principle, the laser projection line can be shot in, and the hand-held detection scribing compass can be placed in the position to carry out measurement. The non-trial-tool type online detection of the numerical control machine tool is realized, the high-precision hole system allowance online detection of the inner cavity of the box body is effectively realized, the efficient machining of the hole system of the box body is improved, and meanwhile, the internal dimension of a large structural member can also be effectively detected.

Description

Laser detection device and method for machining allowance of inner cavity of complex box

Technical Field

The invention belongs to the field of processing of inner cavities of box-type parts, and particularly relates to a laser detection device and method for processing allowance of an inner cavity of a complex box, which are particularly suitable for online detection of hole systems of the inner cavity of the complex box and processing allowance of end faces of the inner cavity, and can also be used for detecting position sizes of contour surfaces which cannot be processed by a cutter in the inner cavity of the complex box or internal sizes of large structural parts.

Background

In the case-type parts, in the machining process, the allowance of the machined part needs to be detected before machining for the high-precision hole system. The prior art generally adopts: (1) adopting a three-dimensional space scribing method; (2) detecting the machining allowance by a traditional two-dimensional scribing method; (3) and (4) mounting on a machine tool, and carrying out cutter test detection. In the prior art, the following limitations exist for high-precision hole series processing in the box body manufacturing process:

(1) in the three-dimensional space marking method, a detector needs to position and install the box body for multiple times and detect according to different standards, the labor intensity is high, when the box body is positioned by a small surface, the gravity center is higher, a workpiece is unstable, and potential safety hazards exist;

(2) for a complex part, the traditional two-dimensional scribing has inaccurate measurement or cannot detect due to structural limitation;

(3) the equipment is used for trial cutting detection, the defect that the machining allowance is insufficient, the defects of blank repair, knife binding, knife collision and the like, high manufacturing cost, low machining efficiency and the like can be caused.

Disclosure of Invention

The invention provides a laser detection device and a laser detection method for machining allowance of an inner cavity of a complex box, and aims to solve the technical problems that: the problem of large-scale structure internal dimension difficult to detect and above-mentioned not enough is solved.

In order to solve the technical problem, the invention provides a laser detection device for machining allowance of an inner cavity of a complex box, which is characterized in that: mainly comprises a handheld detection marking gauge, a laser projection device 4 and a measuring rod 5; the handheld marking gauge comprises a measuring scale 1, a measuring seat 2, a projection plate 3, a handle 8 and a sliding block 9; the measuring base 2 is sleeved on the measuring scale 1, and the sliding block 9 penetrates through the measuring base 2 and is fixed on the measuring scale 1 to drive the measuring scale to slide up and down relative to the measuring base; the measuring seat is fixed on the handle 8; the lower end of the measuring seat is provided with a radial laser projection hole 10, and the projection plate 3 is aligned with the laser projection hole 10 and fixed on one side of the measuring seat; the laser projection device is connected with the main shaft of the machine tool through a measuring rod 5.

The laser detection method for the machining allowance of the inner cavity of the complex box body is characterized by comprising the following steps of:

s1, before the box body is installed, the conventional marking is carried out to determine the rough reference of the parts;

s2, clamping the workpiece on a numerical control machine tool according to the rough reference;

s3, mounting the measuring rod on the machine tool spindle, mounting the laser projection device on the measuring rod, and adjusting the blue line projected by the laser projection device to be collinear with the axis of the machine tool spindle;

s4, placing the handheld detection scribing compass at the part to be detected of the box body, enabling the blue line projected by the laser projection device to penetrate through the handheld detection scribing small hole and be projected to the target center of the projection plate;

s5, measuring, pushing a slide block of the measuring scale, finely adjusting in the process, and repeating the step S4;

and S6, reading out a measured value L according to the scale of the measuring scale and the measuring base, wherein the measured value L is the distance from the center of the machine tool spindle to the detected surface.

Has the advantages that: the invention designs a handheld detection marking gauge by utilizing an optical principle, and is matched with a laser projection device (with a power supply and arranged on a 7:24 Morse handle cutter bar) emitting blue light to realize online non-trial cutter detection of a machine tool, effectively solves the defects and problems, realizes online detection of high-precision hole system allowance of inner cavities of boxes, and improves efficient processing of the holes of the boxes. Meanwhile, the problem that the internal size of a large structural part is not easy to detect is solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a view taken along direction a of fig. 1.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention is provided.

The invention provides a laser detection device for machining allowance of an inner cavity of a complex box, which mainly comprises a handheld detection marking gauge, a laser projection device 4, a measurement rod 5 and a connecting ring 12;

the handheld marking gauge comprises a measuring scale 1, a measuring seat 2, a projection plate 3, a handle 8 and a sliding block 9; the measuring base 2 is sleeved on the measuring scale 1, and the sliding block 9 penetrates through the measuring base 2 and is fixed on the measuring scale 1 to drive the measuring scale to slide up and down relative to the measuring base; the measuring seat is fixed on the handle 8; the lower end of the measuring seat is provided with a radial laser projection hole 10,

the projection plate 3 is aligned with the laser projection hole 10 and fixed on one side of the measuring seat;

the laser projection device 4 is provided with a power supply, one end of the measuring rod 5 is provided with a connecting ring 12, the laser projection device is arranged on the measuring rod 5 through the connecting ring, the measuring rod adopts a 7:24 Morse handle and is arranged on a machine tool main shaft, and the laser projection device projects a blue line 11 which is collinear (superposed) with the axial lead of the machine tool main shaft;

the dipperstick has scale 6 as the main scale, and the seat of surveying has scale 7 for the secondary scale, and handheld handle 8 makes handheld detection marking gauge location, throws blue line 11 promptly and throws hole 10 through the laser, on the bull's eye 13 of projection board, keeps relatively fixed position, and the terminal slider 9 of drive dipperstick makes the dipperstick slide for the seat of surveying, reads out measured value L according to dipperstick scale and seat of surveying scale again.

In the method, in the manufacturing process of box parts, a numerical control machine is used for carrying out online accurate detection on high-precision hole systems and non-machined contour surfaces of the complex box. The operation steps comprise:

and S3, mounting the measuring rod on the machine tool spindle, mounting the laser projection device on the measuring rod, and adjusting the blue line projected by the laser projection device to be collinear (superposed) with the axis line of the machine tool spindle.

and S6, reading the measured value L according to the measuring scale and the scale of the measuring seat.

And L is the distance from the center of the main shaft to the detected surface.

The invention is mainly used for detecting the machining allowance of the inner cavity hole system of the box type part and the internal dimension of the large structural part, and particularly solves the problem that the dimension of the contour surface is difficult to detect by the conventional method. In principle, the laser projection line can be shot in, and the hand-held detection scribing compass can be placed in the position to carry out measurement. The non-trial-tool type online detection of the numerical control machine tool is realized, the high-precision hole system allowance online detection of the inner cavity of the box body is effectively realized, the efficient machining of the hole system of the box body is improved, and meanwhile, the internal dimension of a large structural member can also be effectively detected.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a complicated box inner chamber machining allowance laser detection device which characterized in that: mainly comprises a handheld detection marking gauge, a laser projection device (4) and a measuring rod (5); the handheld marking gauge comprises a measuring scale (1), a measuring seat (2), a projection plate (3), a handle (8) and a sliding block (9); the measuring base is sleeved on the measuring scale, and the sliding block penetrates through the measuring base and is fixed on the measuring scale to drive the measuring scale to slide up and down relative to the measuring base; the measuring seat is fixed on the handle; the lower end of the measuring seat is provided with a radial laser projection hole, and the projection plate is aligned with the laser projection hole and fixed on one side of the measuring seat; the laser projection device is connected with the main shaft of the machine tool through a measuring rod; one end of the measuring rod is provided with a connecting ring, and the laser projection device is arranged on the measuring rod through the connecting ring; the dipperstick is as the main scale, and the seat of surveying is vice chi, and handheld handle makes the projection blue line pass through the laser and throws the hole, and on the bull's-eye of projection board, keep relatively fixed position, the terminal slider of drive dipperstick makes the dipperstick slide for the seat of surveying, again according to dipperstick scale and the seat of surveying scale reading measured value L, is the distance to being detected the face for lathe main shaft center.

2. The laser detection device for the machining allowance of the inner cavity of the complex box body according to claim 1, wherein: the laser projection device is provided with a power supply.

3. The laser detection device for the machining allowance of the inner cavity of the complex box body according to claim 1, wherein: the measuring rod adopts a 7:24 Morse handle and is arranged on a main shaft of the machine tool, so that the blue line projected by the laser projection device is collinear with the axial lead of the main shaft of the machine tool.

4. The laser detection method for the machining allowance of the inner cavity of the complex box body is characterized by comprising the following steps of:

s2, clamping a workpiece on a numerical control machine tool according to the rough reference, and measuring by using the laser detection device for the machining allowance of the inner cavity of the complex box body as claimed in any one of claims 1 to 3;