CN103528903B - Bolt fastener hardness detects and screening plant automatically - Google Patents

Bolt fastener hardness detects and screening plant automatically Download PDF

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Publication number
CN103528903B
CN103528903B CN201310425246.9A CN201310425246A CN103528903B CN 103528903 B CN103528903 B CN 103528903B CN 201310425246 A CN201310425246 A CN 201310425246A CN 103528903 B CN103528903 B CN 103528903B
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China
Prior art keywords
blanking
bolt
parts
workpiece
securing member
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Expired - Fee Related
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CN201310425246.9A
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Chinese (zh)
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CN103528903A (en
Inventor
许黎明
王嗣阳
赖小平
曲征洪
杨子琦
胡德金
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Priority to CN201310425246.9A priority Critical patent/CN103528903B/en
Publication of CN103528903A publication Critical patent/CN103528903A/en
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Publication of CN103528903B publication Critical patent/CN103528903B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The present invention discloses a kind of bolt fastener hardness and automatically detects and screening plant, comprise material loading parts, turntable, Work-sheet pressing parts, blanking parts, sclerometer and desk, material loading parts are fixed on sets a table in mounting seat, and mounting seat of setting a table and turntable are arranged on the base of sclerometer self.Material loading parts, Work-sheet pressing parts, turntable, blanking parts and scleroscopic continuous to-and-fro movement realize continuous multiple spot hardness determination and the screening of bolt.Moving component of the present invention is by cylinder and solenoid actuated, and control mode is simple, reliable operation, easily realize; By simply adjusting the adjustment bolt on actuator, the pad on spring backgauge parts, Workpiece fixing cover and butterfly, realize the hardness determination of different size bolt, flexible; Can carry out to bolt the requirement that multiple spot hardness determination meets scleroscopic use and hardness determination by controlling the turntable anglec of rotation simultaneously; Material loading parts and blanking parts are arranged on sclerometer worktable, complete machine structure spaces compact.

Description

Bolt fastener hardness detects and screening plant automatically
Technical field
The present invention relates to a kind of automatic hardness determination screening plant of manufacturing equipment technical field, specifically, what relate to is a kind of bolt fastener automatic hardness determination screening equipment.
Background technology
Bolt, as one of most widely used mechanical standard parts, has numerous manufacturers, and each manufacturer must by the certification of national securing member technical committee for standardization (TCST).Each bolt must carry out hardness determination according to Standard, will reject if hardness is defective.Current hardness determination is mainly through manual mode of operation, because the bolt length of different size is different with diameter, a lot of producer still adopts artificial loading and unloading, artificial hardness determination and artificial screening mode, efficiency is low, labour intensity is large, and easily make mistakes and there is potential safety hazard, therefore, being necessary very much the automation equipment developing a kind of energy automatic loading/unloading, automatically hardness determination and automatic screening.
Through finding the literature search of prior art, Chinese Patent Application No. is: CN201030207628.1, and name is called: sclerometer; With application number be: CN200510115873.8, name is called: sclerometer, and these two equipment are mainly used for the manual hardness determination mechanism of short run, not to the hardness automatic detection function of bulk article, does not also have automatic loading/unloading and hardness screening function.
Summary of the invention
The object of the invention is to solve above-mentioned deficiency of the prior art, a kind of bolt fastener New Hardness Testing Device of energy automatic loading/unloading, automatically hardness determination and automatic screening is provided, by simple adjustment fast, the hardness determination of different size bolt can be realized, simple to operate, achieve bolt multiple spot hardness determination, improve efficiency and precision.
For realizing above-mentioned object, a kind of bolt fastener hardness of the present invention detects and screening plant automatically, comprise material loading parts, turntable, Work-sheet pressing parts, blanking parts, sclerometer and desk, described material loading parts and turntable are fixed on the base of sclerometer self by securing member, Work-sheet pressing parts are arranged on the workpiece locating mechanism of blanking parts by securing member, blanking parts are arranged on turntable by securing member, and the chute feeder in material loading parts is arranged on the desktop of desk.
Described material loading parts, comprise: spring stock stop, chute feeder, butterfly, air cylinder support, positioning cylinder, catch bar mounting blocks, promotion chuck, pivot arm, pivot arm support, regulating part, adjustable fender, rotary cylinder and mounting seat of setting a table, wherein: air cylinder support and butterfly securing member are fixed on sets a table on mounting seat surface level; Chute feeder is fixed on the desktop of desk; Rotary cylinder, adjustable fender are arranged on sets a table on mounting seat vertical plane; Pivot arm supports and is arranged on rotary cylinder by securing member; Regulating part is arranged on pivot arm and supports; Pivot arm is arranged on regulating part by securing member; Spring stock stop is fixed on butterfly by securing member, and butterfly is arranged on by securing member sets a table in mounting seat; Positioning cylinder is arranged on air cylinder support by securing member; Promote chuck to be connected to by catch bar mounting blocks on the piston rod on positioning cylinder, drive to-and-fro movement by positioning cylinder.
Described spring stock stop comprises: spring, back-up block and material blocking block, and one end of spring is connected on back-up block, and the other end is connected on material blocking block, and material blocking block is enclosed within back-up block by self notch.Spring stock stop is arranged on butterfly, is adjusted the gap of material blocking block and chute feeder by the pad adding or reduce after back-up block.The material blocking block of material loading front spring stock stop blocks the bolt in chute feeder, stops bolt landing; Rotary cylinder driven rotary arm pressure material blocking block during material loading, bolt slips in pivot arm, rotary cylinder driven rotary arm material loading, and now material blocking block is promoted to upspring to block remaining bolt by the elastic force of spring.
Described blanking parts, comprise: two blanking chutes, two blanking groove installing plates, workpiece locating mechanism installing plate, workpiece locating mechanism, positioning supports, locating sleeve, blanking cylinders, wherein: blanking cylinder and positioning supports are arranged on the worktable of turntable self by securing member; Workpiece locating mechanism installing plate is arranged on the slide block of blanking cylinder by securing member, drives workpiece locating mechanism to-and-fro movement; Workpiece locating mechanism is arranged on workpiece locating mechanism installing plate by securing member; Workpiece fixing cover is arranged on workpiece locating mechanism by securing member, the slide block by blanking cylinder drives workpiece locating mechanism bilateral reciprocation realize blanking; Two blanking groove installing plates are arranged on the side on sclerometer self base both sides respectively; Two blanking chutes are arranged on two blanking groove installing plates respectively.
Described Work-sheet pressing parts comprise: voussoir, electromagnet, connection strap, and electromagnet is arranged on workpiece locating mechanism one by securing member and becomes on the inclined-plane at 5 ~ 50 degree of angles with surface level and to be connected with voussoir by connection strap; Voussoir to become with surface level the inclined platform at 5 ~ 50 degree of angles (keep and angle is identical) to carry out support guide above by another one on workpiece locating mechanism is outstanding, can not only hold-down bolt to ensure that cylinder returns rear Work-sheet pressing parts, the gap of bolt and bottom surface when eliminating to the downward power of one, bolt or reduce hardness determination.
Described hardness counts Rockwell Hardness meter, also can be other sclerometer.
For ensureing that hardness is beaten at the eccentric assigned address of workpiece end face, when machine assembles, make Workpiece fixing cover center line and scleroscopic hardness head center line will offset suitable distance (determining during concrete installation), to ensure that hardness is beaten at the eccentric assigned address of workpiece end face; Simultaneously for the workpiece of different size, the securing member that need be connected with mounting seat of setting a table by adjustment butterfly is at diverse location in mounting seat groove of setting a table, adjust the position of butterfly and chute feeder, during guarantee material loading, workpiece can enter into pivot arm correct position; Change the pad between spring stock stop and butterfly, make the material blocking block of spring stock stop can keep suitable distance with chute feeder, realize effective backgauge; Change different size locating sleeve to ensure the position that bolt-center is requiring; Regulate the diverse location of securing member in regulating part groove being used for pivot arm and being connected with regulating part, the relative position adjusted between pivot arm enters rocking of pivot arm to reduce workpiece.
When the present invention works, first, need, according to the size of workpiece, associated workpiece locating sleeve is installed, and adjust the position of butterfly and the spacing of pivot arm.Then workpiece is put into chute feeder, ensure that workpiece direction is consistent, workpiece slips into pivot arm along chute feeder by gravity, rotary cylinder rotates, driven rotary arm rotates, simultaneously the spring of spring stock stop material blocking block of upspringing blocks remaining bolt, rotary cylinder rotarily drives pivot arm and rotates, make workplace vertical, workpiece is shifted onto Workpiece fixing cover location by positioning cylinder drive promotion chuck, and the while that positioning cylinder driving promotion chuck back to move, in Work-sheet pressing parts, electromagnet drives connection strap to promote voussoir hold-down bolt.Now sclerometer is started working, hardness head presses to workpiece top hardness determination, hardness head rises, and turntable rotates an angle hardness head and presses down and carry out hardness determination to more lower, so after circulation enough numbers to be detected, initial position replied by turntable, Work-sheet pressing parts return, sclerometer can be connected to PLC, and PLC records and data processing automatically to workpiece hardness, obtain the hardness number of workpiece, whether qualified with the hardness initial value multilevel iudge workpiece hardness of setting.If workpiece is qualified, blanking cylinder moves left blanking, if defective, blanking cylinder moves right blanking, and the material blocking block that rotary cylinder back rotates dead spring stock stop receives next workpiece.Blanking cylinder drives workpiece locating mechanism motion, and under the drive of workpiece locating mechanism, workpiece moves to base blanking chute wherein, and slides into rewinding case by blanking chute and complete screening.After workpiece falls down material chute, blanking cylinder return, waits for next workpiece.
Compared with prior art, the present invention has following beneficial effect:
1, realize automatic charging, automatic blanking, automatically hardness determination, control mode is simple, reliable operation, automaticity are high;
2, by simply adjusting pad, Workpiece fixing cover and butterfly, pivot arm, realizes multiple spot hardness determination and the screening of different size workpiece, flexible;
3, automatically complete the screening of hardness, efficiency is high;
4, material loading parts and blanking portion and sclerometer height of table integrated, compact integral structure.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is general illustration of the present invention.
Fig. 2 is material loading parts front view of the present invention.
Fig. 3 is material loading parts right view of the present invention.
Fig. 4 is blanking parts left view of the present invention.
Fig. 5 is blanking parts front view of the present invention.
Fig. 6 is Work-sheet pressing parts front view of the present invention.
Fig. 7 is Work-sheet pressing parts left view of the present invention.
Fig. 8 is spring stock stop left view of the present invention.
Fig. 9 is spring stock stop front view of the present invention.
Figure 10 is spring stock stop vertical view of the present invention.
In figure:
Material loading parts 1, blanking parts 2, Work-sheet pressing parts 3, turntable 4, sclerometer 5, desk 6;
Chute feeder 1-1, spring stock stop 1-2, butterfly 1-3, air cylinder support 1-4, positioning cylinder 1-5, catch bar mounting blocks 1-6, promotion chuck 1-7, pivot arm 1-8, adjustable fender 1-9, regulating part 1-10, rotary cylinder 1-11, pivot arm support 1-12 and the mounting seat 1-13 that sets a table;
Blanking chute 2-1, blanking groove installing plate 2-2, positioning supports 2-3, locating sleeve 2-4, workpiece locating mechanism 2-5, workpiece locating mechanism installing plate 2-6, blanking cylinder 2-7;
Voussoir 3-1, electromagnet 3-2, connection strap 3-3;
Spring 1-2-1, back-up block 1-2-2, material blocking block 1-2-3.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
As shown in Figure 1, the present embodiment provides a kind of bolt fastener automatic hardness determination equipment, comprise material loading parts 1, blanking parts 2, Work-sheet pressing parts 3, turntable 4, sclerometer 5, desk 6 form, wherein material loading parts 1 and turntable 4 securing member are fixed on the worktable of sclerometer 5, and the chute feeder 1-1 in material loading parts 1 is arranged on the desktop of desk.
As shown in Figure 2 and Figure 3, described material loading parts 1 comprise: chute feeder 1-1, spring stock stop 1-2, butterfly 1-3, air cylinder support 1-4, positioning cylinder 1-5, catch bar mounting blocks 1-6, promotion chuck 1-7, pivot arm 1-8, adjustable fender 1-9, regulating part 1-10, rotary cylinder 1-11, pivot arm support 1-12 and the mounting seat 1-13 that sets a table, wherein: chute feeder 1-1 securing member is fixed on the desktop of desk 6; Butterfly 1-3 and air cylinder support 1-4 securing member are fixed on sets a table on mounting seat 1-13 surface level; Adjustable fender 1-9 and rotary cylinder 1-11 is arranged on and sets a table on mounting seat 1-13 vertical plane; Pivot arm supports 1-12 and is arranged on rotary cylinder 1-11 by securing member; Regulating part 1-10 is for installing pivot arm 1-8 and regulating the distance between pivot arm 1-8 to reduce rocking of bolt by the adjustment position of pivot arm 1-8 securing member in regulating part 1-10 groove, regulating part 1-10 is arranged on pivot arm and supports on 1-12, and pivot arm 1-8 is arranged on regulating part 1-10 by securing member; Spring stock stop 1-2 is arranged on butterfly 1-3 by securing member fixed support block 1-2-2, and butterfly 1-3 is arranged on by securing member and sets a table on mounting seat 1-13; Positioning cylinder 1-5 is arranged on air cylinder support 1-4 by securing member; Promoting chuck 1-7 is connected on the piston rod of positioning cylinder 1-5 by catch bar mounting blocks 1-6, drives to-and-fro movement by positioning cylinder 1-5.
As shown in Figure 4, Figure 5, described blanking parts 2 comprise: blanking chute 2-1, blanking groove installing plate 2-2, positioning supports 2-3, locating sleeve 2-4, workpiece locating mechanism 2-5, workpiece locating mechanism installing plate 2-6, blanking cylinder 2-7.Wherein: blanking cylinder 2-7 and positioning supports 2-3 is arranged on the worktable of turntable 4 self by securing member; By driving workpiece locating mechanism 2-5 to-and-fro movement on workpiece locating mechanism installing plate 2-6 is arranged on blanking cylinder 2-7 slide block by securing member; Workpiece locating mechanism 2-5 is arranged on workpiece locating mechanism installing plate 2-6 by securing member; Locating sleeve 2-4 is arranged on workpiece locating mechanism 2-5 by securing member; Slide block by blanking cylinder 2-7 drive workpiece locating mechanism 2-5 bilateral reciprocation realize blanking; Two blanking groove installing plate 2-2 are arranged on the side on sclerometer 5 self base both sides respectively; Blanking chute 2-1 is arranged on blanking groove installing plate 2-2.
For ensureing that hardness is beaten at the eccentric assigned address of workpiece end face, when machine assembles, the hardness head center line making Workpiece fixing overlap 2-4 center line and sclerometer 5 will depart from certain distance; Simultaneously for different size workpiece, need adjust butterfly 1-3 position with change spring stock stop 1-2 pad, change locating sleeve 2-4, regulate the relative position of pivot arm 1-8 to reduce workpiece and enter rocking of pivot arm 1-8.
As seen in figs. 8-10, described spring stock stop 1-2 comprises: spring 1-2-1, back-up block 1-2-2, material blocking block 1-2-3, one end of spring 1-2-1 is connected to the other end on support 1-2-2 block and is connected on material blocking block 1-2-3, and material blocking block 1-2-3 is nested on back-up block 1-2-2 by self notch.Spring stock stop 1-2 is arranged on butterfly 1-3, by adding or reduce the gap of the pad adjustment material blocking block 1-2-3 and chute feeder 1-1 after back-up block 1-2-2.
As shown in fig. 6-7, described Work-sheet pressing parts 3 comprise: voussoir 3-1, electromagnet 3-2, connection strap 3-3; Electromagnet 3-2 is arranged on workpiece locating mechanism 2-5 and surface level by securing member and becomes on the inclined-plane at 5 ~ 50 degree of angles and to be connected with voussoir 3-1 by connection strap 3-3; Voussoir 3-1 to become with surface level the inclined platform at 5 ~ 50 degree angles (keeps with angle is identical) to carry out support guide above by another one on workpiece locating mechanism 2-5 is outstanding, with ensure cylinder return rear Work-sheet pressing parts 3 can not only hold-down bolt can also to the gap of bolt when the downward power elimination of one, bolt or minimizing hardness determination and bottom surface.
During this routine implementation, first, need, according to the size of workpiece, associated workpiece locating sleeve 2-4 is installed, and adjust the position of butterfly 1-3 and the spacing of pivot arm 1-8.Then workpiece is put into chute feeder 1-1, ensure that workpiece direction is consistent, workpiece slips into pivot arm 1-8 along chute feeder 1-1 by gravity, rotary cylinder 1-11 rotates, driven rotary arm 1-8 rotates, simultaneously the spring 1-2-1 of the spring stock stop 1-2 material blocking block 1-2-3 that upsprings blocks remaining bolt, rotary cylinder 1-11 rotarily drives pivot arm 1-8 and rotates, make workplace vertical, positioning cylinder 1-5 drives and promotes chuck 1-7, workpiece is shifted onto Workpiece fixing cover 2-4 location, the while that positioning cylinder 1-5 driving promotion chuck 1-7 back to move, in Work-sheet pressing parts 3, electromagnet 3-2 drives connection strap 3-3 to promote voussoir 3-1 hold-down bolt.Now sclerometer 5 is started working, hardness head presses to workpiece top hardness determination, hardness head rises, the turntable 4 angle hardness head that turns clockwise presses down and carries out hardness determination to more lower, and so after circulation enough numbers to be detected, initial position replied by turntable 4, Work-sheet pressing parts 3 return, workpiece hardness is recorded and data processing automatically, obtains workpiece hardness value, whether qualified with the hardness initial value multilevel iudge workpiece hardness of setting.If workpiece is qualified, blanking cylinder 2-7 moves to left blanking, if defective, blanking cylinder 2-7 moves right blanking (with identifying recording layer, judging whether that qualified, blanking is by PLC control realization), and the material blocking block 1-2-3 that rotary cylinder 1-11 back rotates dead spring stock stop 1-2 receives next workpiece.Blanking cylinder 2-7 drives workpiece locating mechanism 2-5 motion, and under the drive of workpiece locating mechanism 2-5, workpiece moves to base blanking chute 2-1 wherein, and slides into rewinding case by blanking chute 2-1 and complete screening.After blanking chute 2-1 fallen into by workpiece, blanking cylinder 2-7 return, waits for next workpiece.
Moving component of the present invention is by cylinder and solenoid actuated, and control mode is simple, reliable operation, easily realize; By simply adjusting the adjustment bolt on actuator, the pad on spring backgauge parts, Workpiece fixing cover and butterfly, realize the hardness determination of different size bolt, flexible; Can carry out to bolt the requirement that multiple spot hardness determination meets scleroscopic use and hardness determination by controlling the turntable anglec of rotation, realize the screening that robotization completes hardness, efficiency is high, not easily makes mistakes simultaneously; Material loading parts and blanking parts are arranged on sclerometer worktable, complete machine structure spaces compact.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.

Claims (7)

1. a bolt fastener hardness detects and screening plant automatically, it is characterized in that comprising material loading parts, turntable, Work-sheet pressing parts, blanking parts, sclerometer and desk, described material loading parts and turntable are fixed on the base of sclerometer self by securing member, Work-sheet pressing parts are arranged on the workpiece locating mechanism of blanking parts by securing member, blanking parts are arranged on turntable by securing member, and the chute feeder in material loading parts is arranged on the desktop of desk;
Described material loading parts comprise: spring stock stop, chute feeder, butterfly, air cylinder support, positioning cylinder, catch bar mounting blocks, promotion chuck, pivot arm, pivot arm support, regulating part, adjustable fender, rotary cylinder and mounting seat of setting a table, wherein: air cylinder support and butterfly securing member are fixed on sets a table on mounting seat surface level; Chute feeder is fixed on the desktop of desk; Rotary cylinder, adjustable fender are arranged on sets a table on mounting seat vertical plane; Pivot arm supports and is arranged on rotary cylinder by securing member; Regulating part is arranged on pivot arm and supports; Pivot arm is arranged on regulating part by securing member; Spring stock stop is fixed on butterfly by securing member, and butterfly is arranged on by securing member sets a table in mounting seat; Positioning cylinder is arranged on air cylinder support by securing member; Promote chuck to be connected to by catch bar mounting blocks on the piston rod on positioning cylinder, drive to-and-fro movement by positioning cylinder;
Described spring stock stop comprises: spring, back-up block and material blocking block, one end of spring is connected on back-up block, the other end is connected on material blocking block, material blocking block is enclosed within back-up block by self notch, spring stock stop is arranged on butterfly, is adjusted the gap of material blocking block and chute feeder by the pad adding or reduce after back-up block.
2. a kind of bolt fastener hardness according to claim 1 detects and screening plant automatically, it is characterized in that: before material loading, the material blocking block of described spring stock stop blocks the bolt in chute feeder, stops bolt landing; Rotary cylinder driven rotary arm pressure material blocking block during material loading, bolt slips in pivot arm, rotary cylinder driven rotary arm material loading, and now material blocking block is promoted to upspring to block remaining bolt by the elastic force of spring.
3. a kind of bolt fastener hardness according to claim 1 detects and screening plant automatically, it is characterized in that: described pivot arm is provided with bolt, according to the difference of workpiece size specification, adjust the butterfly in described material loading parts position and by adjustment pivot arm on bolt adjust pivot arm relative position reduce workpiece enter rocking of pivot arm.
4. a kind of bolt fastener hardness according to any one of claim 1-3 detects and screening plant automatically, it is characterized in that: described blanking parts comprise: two blanking chutes, two blanking groove installing plates, workpiece locating mechanism installing plate, workpiece locating mechanism, positioning supports, locating sleeve, blanking cylinders, wherein: blanking cylinder and positioning supports are arranged on the worktable of turntable self by securing member; Workpiece locating mechanism installing plate is arranged on the slide block of blanking cylinder by securing member, drives workpiece locating mechanism to-and-fro movement; Workpiece locating mechanism is arranged on workpiece locating mechanism installing plate by securing member; Workpiece fixing cover is arranged on workpiece locating mechanism by securing member, the slide block by blanking cylinder drives workpiece locating mechanism bilateral reciprocation realize blanking; Two blanking groove installing plates are arranged on the side on sclerometer self base both sides respectively; Two blanking chutes are arranged on two blanking groove installing plates respectively.
5. a kind of bolt fastener hardness according to claim 4 detects and screening plant automatically, it is characterized in that: described Workpiece fixing cover center line and scleroscopic hardness head center line will offset a suitable distance, and this distance ensures that hardness is beaten at the eccentric assigned address of workpiece end face.
6. a kind of bolt fastener hardness according to claim 4 detects and screening plant automatically, it is characterized in that: according to the difference of workpiece size specification, by changing Workpiece fixing cover, reaches accurate location.
7. a kind of bolt fastener hardness according to any one of claim 1-3 detects and screening plant automatically, it is characterized in that: described Work-sheet pressing parts comprise: voussoir, electromagnet, connection strap, electromagnet is arranged on workpiece locating mechanism one by securing member and becomes on the inclined-plane at 5 ~ 50 degree of angles with surface level and to be connected with voussoir by connection strap; Voussoir is given prominence to by another one on workpiece locating mechanism and is become the inclined platform at 5 ~ 50 degree of angles to carry out support guide with surface level, the angle on this inclined-plane, two places is identical, can not only hold-down bolt to ensure that cylinder returns rear Work-sheet pressing parts, the gap of bolt and bottom surface when eliminating to the downward power of one, bolt or reduce hardness determination.
CN201310425246.9A 2013-09-17 2013-09-17 Bolt fastener hardness detects and screening plant automatically Expired - Fee Related CN103528903B (en)

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CN107727513A (en) * 2017-11-15 2018-02-23 昆山欧思克精密工具有限公司 A kind of material fracture resistence force detection device
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CN109396066B (en) * 2018-12-24 2024-03-12 安徽省巢湖铸造厂有限责任公司 Integrated automatic fastener hardness sorting machine
CN111811804B (en) * 2020-07-22 2022-04-08 重庆金海标准件有限公司 Fastener detection device
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