阅读说明：本技术 一种用于压制成型炸药的残余应力检测装置及方法 (Residual stress detection device and method for compression molding explosive ) 是由 黄亚峰 赵凯 杨雄 赵东奎 王波 路浩 邢立伟 于 2021-10-09 设计创作，主要内容包括：一种用于压制成型炸药的残余应力检测装置及检测方法,包括吊装装置、工作平台、装夹定位装置和自动对中钻孔装置；吊装装置位于工作平台一侧,装夹定位装置固定在工作平台上；自动对中钻孔装置位于装夹定位装置上方。本发明发明了用于药柱内部残余应力检测的自动装置,负压吸附条件下进行自动对中、钻孔、应变信号采集,避免了药粉的沉积、摩擦带来的危险性,实现了药残余应力的自动采集和检测。(A residual stress detection device and a detection method for a compression molding explosive comprise a hoisting device, a working platform, a clamping and positioning device and an automatic centering and drilling device; the hoisting device is positioned on one side of the working platform, and the clamping and positioning device is fixed on the working platform; the automatic centering drilling device is positioned above the clamping and positioning device. The automatic device for detecting the residual stress in the drug column automatically performs centering, drilling and strain signal acquisition under the condition of negative pressure adsorption, avoids the dangerousness brought by deposition and friction of the drug powder, and realizes automatic acquisition and detection of the residual stress of the drug.)

1. A residual stress detection device for a compression molding explosive is characterized by comprising a hoisting device, a working platform, a clamping and positioning device and an automatic centering and drilling device; the hoisting device is positioned on one side of the working platform, and the clamping and positioning device is fixed on the working platform; the automatic centering drilling device is positioned above the clamping and positioning device.

2. The residual stress detection device for the compression-molded explosive according to claim 1, wherein the hoisting device comprises a pneumatic selective loading boom and a sling chain; the suspension chain is arranged on the suspension arm, and the hoisting device is used for hoisting the explosive column on the product line.

3. The residual stress detection device for the press-formed explosive according to claim 1, wherein the bottom of the working platform is provided with a support leg.

4. The residual stress detection device for the press-formed explosive according to claim 1, wherein the clamping and positioning device comprises: the device comprises a positioning tray, a conveying chain, a fine adjustment platform, a clamping mechanism and a positioning sensor; the conveying chain is arranged on the working platform, the positioning tray is arranged on the conveying chain, the positioning sensor is arranged on the positioning tray, the fine adjustment platform is arranged on the side face of the positioning tray, and the clamping mechanism is located on the side face of the fine adjustment platform.

5. The residual stress detection device for the press-formed explosive according to claim 1, wherein the fine tuning platform and the positioning sensor are connected with an external controller for controlling the fine tuning platform to move and collect data.

6. The residual stress detection device for the compression-molded explosive according to claim 1, wherein the automatic centering and drilling device comprises an optical centering device and a vacuum negative pressure drill, and the optical centering device comprises a laser emitter and a strain relief with an optical reflection strip; the strain flower with the optical reflection strip is adhered to the end face of the explosive column, and the vacuum negative pressure drill and the laser emitter are positioned above the strain flower with the optical reflection strip.

7. The residual stress detection device for the press-formed explosive according to claim 6, wherein the laser emitter is fixed on the side surface of the vacuum negative pressure drill; an anti-static box is arranged on the vacuum negative pressure drill.

8. A residual stress detection device and method for a compression-molded explosive are characterized in that the residual stress detection device for the compression-molded explosive is based on any one of claims 1 to 7 and comprises the following steps:

1) the hoisting device hoists the explosive columns on the product line into a positioning tray on the working platform;

2) after the positioning sensor detects that the explosive columns are placed on the positioning drags, the explosive column positioning signals are transmitted to the computer, the computer sends out instructions, the positioning tray with the explosive columns is transported to the fine adjustment platform by the chain device and stops after reaching the positioning pins, and then the clamping mechanism automatically clamps the positioning tray with the explosive columns;

3) the optical centering device starts to work, a laser beam is emitted to irradiate and scan the positioning reflection strip on the strain gauge flower, the central deviation is fed back to the fine adjustment platform, and the fine adjustment platform is automatically controlled to carry out fine adjustment according to the deviation distance until the laser beam is centered with the center of the strain gauge flower;

4) compressed air is injected into the drilling device to cause local negative pressure; starting to collect strain signals; the automatic drilling is started, and the medicine powder is automatically sucked into the anti-static containing bag by negative pressure;

5) drilling to a specified depth, slowly withdrawing the drill bit, stopping drilling, stopping the work of the stress acquisition device, and stopping the injection of compressed air; and finishing acquisition and detecting.

Technical Field

The invention belongs to the technical field of explosive residual stress detection, and particularly relates to a residual stress detection device and method for a compression-molded explosive.

Background

The existing residual detection technology for the compression molding material is novel and mature, and has public reports, detection devices and technical standards. And no direct detection equipment and process on a product line.

1) The existing residual stress detection technology is mainly used for metal materials and crystal materials.

2) The existing detection of the explosive substance is dangerous.

Disclosure of Invention

The invention aims to provide a residual stress detection device and a residual stress detection method for a compression-molded explosive, so as to solve the problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

a residual stress detection device for a compression molding explosive comprises a hoisting device, a working platform, a clamping and positioning device and an automatic centering and drilling device; the hoisting device is positioned on one side of the working platform, and the clamping and positioning device is fixed on the working platform; the automatic centering drilling device is positioned above the clamping and positioning device.

Further, the hoisting device is characterized by comprising a pneumatic selective loading suspension arm and a suspension chain; the suspension chain is arranged on the suspension arm, and the hoisting device is used for hoisting the explosive column on the product line.

Furthermore, the bottom of the working platform is provided with supporting legs.

Further, clamping positioner includes: the device comprises a positioning tray, a conveying chain, a fine adjustment platform, a clamping mechanism and a positioning sensor; the conveying chain is arranged on the working platform, the positioning tray is arranged on the conveying chain, the positioning sensor is arranged on the positioning tray, the fine adjustment platform is arranged on the side face of the positioning tray, and the clamping mechanism is located on the side face of the fine adjustment platform.

Furthermore, the fine tuning platform and the positioning sensor are connected with an external controller and used for controlling the fine tuning platform to move and collecting data.

Further, the automatic centering drilling device comprises an optical centering device and a vacuum negative pressure drill, wherein the optical centering device comprises a laser emitter and a strain flower with an optical reflection strip; the strain flower with the optical reflection strip is adhered to the end face of the explosive column, and the vacuum negative pressure drill and the laser emitter are positioned above the strain flower with the optical reflection strip.

Further, the laser emitter is fixed on the side surface of the vacuum negative pressure drill; an anti-static box is arranged on the vacuum negative pressure drill.

Further, the device and the method for detecting the residual stress of the compression-molded explosive comprise the following steps:

1) the hoisting device hoists the explosive columns on the product line into a positioning tray on the working platform;

2) after the positioning sensor detects that the explosive columns are placed on the positioning drags, the explosive column positioning signals are transmitted to the computer, the computer sends out instructions, the positioning tray with the explosive columns is transported to the fine adjustment platform by the chain device and stops after reaching the positioning pins, and then the clamping mechanism automatically clamps the positioning tray with the explosive columns;

3) the optical centering device starts to work, a laser beam is emitted to irradiate and scan the positioning reflection strip on the strain gauge flower, the central deviation is fed back to the fine adjustment platform, and the fine adjustment platform is automatically controlled to carry out fine adjustment according to the deviation distance until the laser beam is centered with the center of the strain gauge flower;

4) compressed air is injected into the drilling device to cause local negative pressure; starting to collect strain signals; the automatic drilling is started, and the medicine powder is automatically sucked into the anti-static containing bag by negative pressure;

5) drilling to a specified depth, slowly withdrawing the drill bit, stopping drilling, stopping the work of the stress acquisition device, and stopping the injection of compressed air; and finishing acquisition and detecting.

Compared with the prior art, the invention has the following technical effects:

the automatic device for detecting the residual stress in the drug column automatically performs centering, drilling and strain signal acquisition under the condition of negative pressure adsorption, avoids the dangerousness brought by deposition and friction of the drug powder, and realizes automatic acquisition and detection of the residual stress of the drug.

1) The adopted negative pressure adsorption device combination, compressed air is injected into the drilling device, local negative pressure is formed in the area above the drill bit, the medicine powder is automatically adsorbed and directionally collected in the drilling process, random deposition of the medicine powder is avoided, and dangerousness is reduced.

2) The strain rosette with the optical reflection strip is matched with a feedback control system and a fine adjustment platform, so that micron-sized accurate centering and drilling under an unmanned condition are realized.

3) And the signal acquisition stability in the drilling process is ensured.

Drawings

Fig. 1 is a view showing the entire structure of the apparatus.

FIG. 2 shows a clamping and positioning device and an optical centering device.

Fig. 3 is an automatic drilling and stress collecting device.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

a residual stress detection device for a compression molding explosive comprises a hoisting device, a working platform, a clamping and positioning device and an automatic centering and drilling device;

the automatic drilling device and the clamping and positioning device are fixed on the working platform.

The hoisting device is positioned at one side of the working platform and is responsible for hoisting the explosive columns on the product line and hoisting the explosive columns into the positioning tray on the working platform;

clamping positioner is located work platform, includes: positioning tray, conveying chain, fine tuning platform, positioning sensor, etc.

Automatic centering drilling equipment is located work platform, includes: the device comprises an optical centering device, a fine adjustment platform feedback control device, a drilling device, a negative pressure adsorption device, a storage bag and the like.

The overall structure is shown in fig. 1.

The hoisting device comprises: and a suspension arm, a suspension chain, a grain protective shell and a protective chain are selected and installed pneumatically.

The working platform comprises

1) The hoisting device hoists the explosive columns on the product line into a positioning tray on the working platform;

2) after the pressure sensor detects that the explosive columns are placed on the positioning drags, the explosive column in-place signals are transmitted to the computer, the computer sends out instructions, the positioning tray with the explosive columns is conveyed to the fine adjustment platform by the chain device and stops after reaching the positioning pins, and then the positioning tray with the explosive columns is automatically clamped by the clamping device.

3) And the optical centering device starts to work, emits laser beams to irradiate and scan the positioning reflection strips on the strain gauge flower, feeds the central deviation back to the fine adjustment platform, and automatically controls the fine adjustment platform to carry out fine adjustment according to the deviation distance until the laser beams are centered with the center of the strain gauge flower.

4) The optical centering device is removed and the drilling device with the same diameter is transferred by the automatic rotating mechanism.

5) Compressed air is injected into the drilling device to cause local negative pressure; the stress acquisition device starts to acquire a strain signal; and (5) automatically drilling, and automatically sucking the medicine powder into the anti-static containing bag by negative pressure.

6) And (4) drilling to a specified depth, withdrawing the drill bit slowly, stopping drilling, stopping the work of the stress acquisition device, and stopping the injection of the compressed air.

7) The above process is under the whole-course remote monitoring of the anti-riot camera.

The clamping and positioning device comprises

The method comprises the following steps: positioning tray, conveying chain, fine tuning platform, positioning sensor, etc.

The automatic drilling device comprises an optical centering device and a vacuum negative pressure drill bit, and the strain flower with the optical reflection strip is adhered to the end face of the explosive column.

And the optical centering device starts to work, emits laser beams to irradiate and scan the positioning reflection strips on the strain gauge flower, feeds the central deviation back to the fine adjustment platform, and automatically controls the fine adjustment platform to carry out fine adjustment according to the deviation distance until the laser beams are centered with the center of the strain gauge flower.

A residual stress detection device and method for a compression-molded explosive comprise the following steps:

1) the hoisting device hoists the explosive columns on the product line into a positioning tray on the working platform;

2) after the pressure sensor detects that the explosive columns are placed on the positioning drags, the explosive column in-place signals are transmitted to the computer, the computer sends out instructions, the positioning tray with the explosive columns is conveyed to the fine adjustment platform by the chain device and stops after reaching the positioning pins, and then the positioning tray with the explosive columns is automatically clamped by the clamping device.

3) And the optical centering device starts to work, emits laser beams to irradiate and scan the positioning reflection strips on the strain gauge flower, feeds the central deviation back to the fine adjustment platform, and automatically controls the fine adjustment platform to carry out fine adjustment according to the deviation distance until the laser beams are centered with the center of the strain gauge flower.

4) The optical centering device is removed and the drilling device with the same diameter is transferred by the automatic rotating mechanism.

5) Compressed air is injected into the drilling device to cause local negative pressure; the stress acquisition device starts to acquire a strain signal; and (5) automatically drilling, and automatically sucking the medicine powder into the anti-static containing bag by negative pressure.

And (3) drilling holes in vacuum at negative pressure, wherein gas on the upper part of the drill bit flows rapidly to form negative pressure, the negative pressure adsorbs medicine powder, the powder during drilling is sucked away and collected in a static electricity discharge box, and meanwhile, data of the strain gauge is collected.

6) And (4) drilling to a specified depth, withdrawing the drill bit slowly, stopping drilling, stopping the work of the stress acquisition device, and stopping the injection of the compressed air.

7) The above process is under the whole-course remote monitoring of the anti-riot camera.

The residual stress is measured by strictly operating according to the specifications and requirements, and the process flow is as follows:

1) and preparing the surface of the tested material. The surface of the workpiece to be tested is very important for the pasting quality of the strain gauge, the pasting surface is guaranteed to be clean as much as possible, the finger contact is forbidden on the surface which is processed to be clean, meanwhile, the surface to be cleaned is not suitable for being placed for too long time, and the strain gauge is pasted as soon as possible.

2) And (5) pasting the strain gauge. Before the strain gauge is adhered, the strain gauge is checked and confirmed to be intact, and insulation resistance among all wires is measured by a multimeter for confirmation. During field operation, dust is prevented from falling into the strain gauge to influence the pasting quality. The application of the strain gauges (adhesives, pastes, wiring, protective coatings, etc.) should be done exactly as required by the manufacturer's specifications and to ensure that they are not damaged during the measurement process.

3) Wire and connection strain gauge. When welding the lead, attention should be paid to prevent the contact between the lead and the structural member, so as to ensure good insulating property, and simultaneously prevent the strain gauge lead-out wire from being damaged by pulling when welding the lead. After the wires are welded and connected, insulating glue is applied to the strain gauge and the wires to prevent wire grids from being damaged or short circuits from being caused.

4) And (6) drilling. And (4) determining the drilling depth by using a process gasket by adopting an automatic drilling centering device. The hole should be centered exactly, and the center of the hole should coincide with the center of the strain flower, and the deviation should not exceed +/-0.015D 0. When the deviation is +/-0.015-0.05) D0, correcting; the drilling tool and process should minimize plastic deformation in the area near the blind hole wall to reduce the additional strain of the drilling process.

5) And collecting, recording and storing data.

And after the equipment is started for 15 minutes and reaches a thermal stable state, drilling and data acquisition are started. Setting key parameters such as sampling frequency and bridge connection release method, performing strain zero clearing on each channel before drilling, then performing data acquisition in advance, storing a release strain value measured by software after drilling is completed, and numbering and marking test points.