CN113532380A

CN113532380A - Combined type heavy machine tool foundation settlement precision detection device

Info

Publication number: CN113532380A
Application number: CN202110877666.5A
Authority: CN
Inventors: 杨聪彬; 张建涛; 刘志峰; 姜凯; 赵永胜; 苏贺旺
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2021-08-01
Filing date: 2021-08-01
Publication date: 2021-10-22
Anticipated expiration: 2041-08-01
Also published as: CN113532380B

Abstract

The invention discloses a combined type heavy machine tool foundation settlement precision detection device, and belongs to the field of heavy machine tool foundation settlement precision detection. According to the structural characteristics of heavy digit control machine tool, design into a plurality of basic subblock integrated configuration respectively with the main atress region of basis, lay optical fiber sensor in basic subblock and be used for detecting basic bearing deformation, single optical fiber sensor simple to operate, it is higher to detect the precision, and the change of single basic subblock can be realized to combination formula foundation block moreover. The optical fiber sensor is led out through the reserved groove of the foundation block and is connected into the multichannel acquisition equipment in parallel, when the optical fiber sensor is damaged, the foundation block with problems is conveniently and quickly positioned, and finally, the distributed optical fiber sensing system is utilized to realize data acquisition of foundation settlement. The experimental device adopts an adjustable foundation box, and the rigidity requirement of the combined foundation block is ensured.

Description

Combined type heavy machine tool foundation settlement precision detection device

Technical Field

The invention relates to the technical field of heavy numerical control machine tool foundation settlement detection, in particular to a combined type heavy machine tool foundation settlement precision detection device.

Background

The concrete foundation is the bearing body of a heavy numerical control machine tool, and the bearing deformation of the concrete foundation directly influences the working precision and the service life of machine tool components. In order to ensure accuracy, it is generally required that the base portion of the bed guide is inclined by an amount of not more than 0.005mm in the longitudinal direction. The high-precision detection method needs to be matched with the high-precision design requirement, the traditional detection method cannot meet the detection requirement from the assembly of a sensor and the test precision, and the problem can be better solved by laying optical fiber sensors with high measurement sensitivity and strong anti-interference capability in a concrete foundation. In view of the characteristics of large size and large volume of a heavy numerical control machine tool, an experimental model for researching the size reduction is often selected, but once concrete is poured, the concrete cannot be changed, when an optical fiber sensor paved inside breaks down, deformation of the area cannot be detected any more in subsequent work, only a new experimental device can be replaced, and economic waste is caused. Therefore, in order to save the experiment cost, the research on the combined foundation detection device for detecting the foundation settlement of the heavy numerical control machine tool is of great significance.

Disclosure of Invention

The invention aims to provide a combined type heavy machine tool foundation settlement precision detection device, which can be used for acquiring settlement deformation data of a heavy machine tool foundation through an experimental device, and can realize replacement of foundation blocks and high-precision detection of short-distance distributed sensors aiming at the problems of resource waste caused by the fact that embedded sensors in an integrated foundation are damaged and cannot be replaced and the detection precision caused by the fact that a single sensor is long.

In order to achieve the purpose, the technical scheme adopted by the invention is a combined type heavy machine tool foundation settlement precision detection device, and the experimental device comprises a detachable foundation box, a replaceable foundation block, an optical fiber sensor, multi-channel acquisition port equipment and an ODISI distributed optical fiber sensing system.

1, a first combined type basic sub-block, 2, a second combined type basic sub-block, 3, a third combined type basic sub-block and 4, a fourth combined type basic sub-block, are connected in series and placed on one side of a nine 16 combined type basic sub-block, and similarly, a fifth combined type basic sub-block, 11, a sixth combined type basic sub-block, 12, a seventh combined type basic sub-block and an eighth combined type basic sub-block, 13, are connected in series and placed on the other side, so that a cubic-structure machine tool basic model is combined. The foundation sub-blocks are fixed by 5 adjustable foundation boxes, and the connection rigidity of the combined foundation is ensured by 6 adjusting nuts.

As shown in fig. 3, each combined type foundation sub-block adopts a reinforced concrete structure, 8 optical fiber sensors are glued and sealed on 15 optical fiber sensor carriers in each combined type foundation sub-block, the optical fiber sensors are led out along 9 preformed grooves on each combined type foundation sub-block and connected to multi-channel acquisition port equipment externally arranged on a foundation box in parallel. The multi-channel acquisition port equipment is connected with the 5-adjustable basic boxes through acquisition data lines and the ODISI distributed optical fiber sensing system through bolt bolting, and acquires the basic settlement data at different positions.

The invention has the following advantages:

1. each sub-block forming the foundation of the heavy machine tool is replaceable, when an optical fiber sensor laid in the foundation sub-block breaks down, the sub-blocks can be replaced to form a foundation settlement detection system with a complete detection area, a model does not need to be made again, and resource waste is avoided.

2. The foundation sub-block is small in size, and compared with the optical fiber sensor paved at the whole bed body, the optical fiber sensor paved in the foundation sub-block is short in length of a single sensor, so that the problem of sensor straightness and installation stress caused by the fact that the optical fiber sensor is long can be reduced when concrete is poured, and later leveling and zeroing work is avoided; the short-distance distributed optical fiber sensor is more convenient to install and higher in measurement precision.

3. The optical fiber sensor of the basic sub-block realizes independent acquisition and is connected to acquisition port equipment with multiple channels, and if the optical fiber sensor fails, the optical fiber sensor can quickly position the basic sub-block which fails according to the preset number of the channels.

4. The simple foundation box is arranged around the foundation sub-blocks for control, the tightness of the connecting bolts can be adjusted to ensure the rigidity of the foundation blocks in the horizontal direction, and the detection accuracy is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the apparatus

Fig. 2 is a combined basic schematic.

Fig. 3 is a schematic diagram of neighboring base subblocks.

In the figure: 1. combined

basic sub-block

1, 2, combined

basic sub-block

2, 3, combined

basic sub-block

3, 4, combined

basic sub-block

4, 10, combined

basic sub-block

5, 11, combined

basic sub-block

6, 12, combined

basic sub-block

7, 13, combined

basic sub-block

8, 16, combined

basic sub-block

9, 5, adjustable basic box, 6, adjusting nut, 7, multi-channel acquisition port equipment, 8, optical fiber sensor, 9, basic sub-block preformed groove, 14, ODISI distributed optical fiber sensing system, 15, optical fiber sensor carrier

Detailed Description

Fig. 1 to 3 show a combined type heavy machine tool foundation settlement precision detection device.

And determining the size of the machine tool foundation according to the set machine tool scale. And selecting the position of the basic comparison guide rail to arrange the optical fiber sensor by referring to the topological structure and the stress characteristics of the machine tool. In order to replace the damaged sensor, each base is designed in a combined mode, and the combined design can be determined according to actual conditions, wherein four sub-blocks are taken as an example, and the length of each sub-block is equivalent. The combination type foundation is fixed with the adjustable foundation box 5 all around, the rigidity of the foundation blocks is guaranteed by adjusting the tightness of the adjusting nuts 6, and the single combination type foundation sub-blocks are guaranteed to be in contact with the contact surface in a rough manner, so that full contact is guaranteed, and gaps are avoided.

And a cross rib arrangement mode is adopted in the foundation subblock, so that the rigidity of the foundation subblock is ensured. A layer of fibre-optic sensor carrier 15 is arranged horizontally in the X direction in the middle of the foundation. Milling a groove of suitable size along the axis direction of the optical fiber sensor carrier 15, and carrying out corresponding polishing treatment, avoid the sensor fish tail, paste the optical fiber sensor 8 in the optical fiber sensor carrier 15 inslot, add the pretightning force of suitable size, ensure that the optical fiber sensor 8 fully contacts with the groove bottom, guarantee that line optical fiber sensor 8 and optical fiber sensor carrier 15 synchronous deformation, splice the optical fiber sensor, encapsulate in the reservation tank of optical fiber sensor carrier 15, adopt armoured sheath line to encapsulate the protection to remaining optical fiber sensor, and derive optical fiber sensor 8 along the axis direction of basic subblock reservation tank 9.

The optical fiber sensors led out from the basic sub-blocks are connected in parallel to the corresponding channels at the 7 positions, so that the parallel collection work of the distributed optical fiber sensors is realized, and the positions of the optical fiber sensors with problems are convenient to find.

And connecting the multichannel acquisition port equipment 7 with the ODISI distributed optical fiber sensing system 14 by using an acquisition data line to obtain settlement deformation data of different positions of the machine tool basic model.

Claims

1. The utility model provides a modular heavy machine tool basis subsides precision measurement device which characterized in that: the device comprises a detachable foundation box, a replaceable foundation block, an optical fiber sensor, a multi-channel acquisition port device and an ODISI distributed optical fiber sensing system;

the replaceable basic block comprises a combined basic sub-block I, a combined basic sub-block II, a combined basic sub-block III, a combined basic sub-block IV, a combined basic sub-block V, a combined basic sub-block VI, a combined basic sub-block VII, a combined basic sub-block VIII and a combined basic sub-block VII; placing a combined type foundation sub-block I, a combined type foundation sub-block II, a combined type foundation sub-block III and a combined type foundation sub-block IV on one side of a combined type foundation sub-block nine in a serial connection mode, placing a combined type foundation sub-block V, a combined type foundation sub-block VI, a combined type foundation sub-block VII and a combined type foundation sub-block VIII on the other side in a serial connection mode, and combining to form a machine tool foundation model with a cubic structure; fixing each replaceable foundation block by using an adjustable foundation box, and ensuring the connection rigidity of the combined foundation through adjusting nuts;

each replaceable foundation block is of a reinforced concrete structure, the optical fiber sensors are sealed on optical fiber sensor carriers in each combined foundation sub-block in a cementing mode, the optical fiber sensors are led out along the reserved grooves in each combined foundation sub-block and connected to multi-channel acquisition port equipment externally arranged on a foundation box in parallel; the multichannel acquisition port equipment is bolted on the adjustable basic box through screws and connected with the ODISI distributed optical fiber sensing system through an acquisition data line, and acquired basic settlement data at different positions are acquired.