CN114910357A - Metal fastener strength detection device and detection method - Google Patents
Metal fastener strength detection device and detection method Download PDFInfo
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- CN114910357A CN114910357A CN202210807162.0A CN202210807162A CN114910357A CN 114910357 A CN114910357 A CN 114910357A CN 202210807162 A CN202210807162 A CN 202210807162A CN 114910357 A CN114910357 A CN 114910357A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
The invention relates to the technical field of quality performance detection, and particularly provides a device and a method for detecting the strength of a metal fastener; the device comprises a detection bracket for fixed support, wherein a detection fixing device for fixing and detecting a metal fastener is assembled on the detection bracket; a tension applying mechanism for providing tension is assembled on the detection bracket; the tension applying mechanism is sequentially connected with a stroke adapting assembly and a lifting executing mechanism from top to bottom; the lifting executing mechanism is positioned right above the detection fixing device; the strength detection device provided by the invention is specially used for detecting the tensile strength of the lifting bolt fastener, can be used for detecting the strength of the lifting bolt in multiple batches in the same batch, improves the authenticity and accuracy of detection, and can provide more reliable strength detection value reference.
Description
Technical Field
The invention relates to the technical field of quality performance detection, and particularly provides a device and a method for detecting the strength of a metal fastener.
Background
The metal fastener is a fastener which is mainly processed from a metal material such as steel. The metal fasteners are mainly divided into various parts such as bolts, studs, screws, nuts, washers, automatic screws, wood screws, check rings, pins, rivets, welding nails and the like, and are various in types and have respective purposes and use standards. The bolt refers to a fastener including a head and a bolt, and the eye bolt fastener is used as one of the bolt fasteners, and the general structure of the eye bolt fastener is as shown in fig. 10, that is, the head is a circular ring structure convenient for lifting. As the name suggests, the lifting bolt fastener is generally a mechanical part which is fastened and connected on an object to be lifted by temporary threads, so that lifting equipment can conveniently lift and transfer the object to be lifted in a matched manner.
The lifting operation is dangerous operation, and often, dangers are caused because workers do not follow correct operation specifications or lifting equipment fails, even disasters occur, and therefore serious safety operation accidents occur. In the actual hoisting operation, the danger is often caused because of the selection of the improper suspension bolt or the fracture of the suspension bolt due to the strength problem of the suspension bolt, and the safety production has no trouble, so that the selection of the suspension bolt with the proper strength is the basic guarantee for the safety operation during the hoisting operation, and the strength detection of the produced suspension bolt is strictly carried out, so that the strength quality of the produced suspension bolt is determined.
When the lifting bolt is used in actual lifting, the lifting bolt not only can directly receive the pulling force of zero-degree (indicating that the pulling force direction is in the same direction as the axial direction of the screw rod) lifting, but also can receive the pulling force of lateral (indicating that the pulling force direction and the axial direction of the screw rod are at a certain inclined included angle) lifting, but the lateral lifting angle is not necessary, and the strength of the lifting bolt can be lost in the lateral lifting process, so that the strength can be uniformly detected, and the lifting bolt is generally detected only by the zero-degree lifting pulling strength. The fracture of the lifting bolt generally occurs at the connecting position of the screw rod and the head or on the screw rod, in the traditional tensile strength detection process, the tensile strength detection is usually carried out by respectively pulling the lifting ring end and the screw rod end of the lifting bolt, and in the actual lifting process, the lifting bolt is directly screwed on a lifting object, so that the selection of a pulling force application point in the traditional detection process has a great influence on the tensile strength detection value, sometimes the tensile strength state of the lifting bolt cannot be accurately and truly reflected, and in the traditional detection process, the detection mode of detecting by using a single lifting bolt sometimes exists, the accidental property exists in the detection process, and the average strength state cannot be well reflected.
Disclosure of Invention
In order to solve the above problems, the present invention provides a device and a method for detecting the strength of a metal fastener, which are used to solve the above problems in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a metal fastener strength detection device comprises a detection bracket for fixed support, wherein a detection fixing device for fixing and detecting a metal fastener is assembled on the detection bracket; a tension applying mechanism for providing tension is assembled on the detection bracket; the tension applying mechanism is sequentially connected with a stroke adapting assembly and a lifting executing mechanism from top to bottom; the lifting executing mechanism is positioned right above the detection fixing device.
The detection fixing device comprises a switching station roller which is horizontally and rotatably arranged on the detection bracket and can rotate to switch stations, and a switching locking mechanism which is assembled on the detection bracket and used for positioning the switching station roller after the stations are switched; the station switching roller comprises a square rotating roller with a square structure in the axial vertical section, four side surfaces of the square rotating roller around the axial direction are fixing surfaces for four lifting bolt fasteners with different sizes, and a plurality of threaded connecting cylinders which are detachably and fixedly arranged and are used for threaded fixed connection of the lifting bolt fasteners with the same size are uniformly distributed on each fixing surface along the axial direction; the tension applying mechanism comprises a lifting beam plate vertically and slidably mounted at the top of the detection support, and a plurality of tension sensors with top stress ends fixedly connected to the bottom end of the lifting beam plate; the plurality of tension sensors and the plurality of threaded connecting cylinders are arranged on the same fixed surface of the square rotating roller in a one-to-one correspondence mode; the bottom stress ends of the plurality of tension sensors are fixedly connected to the stroke adapting assembly together; the lifting executing mechanism comprises a synchronous lifting grabbing mechanism, and a plurality of lifting manipulators which are vertically arranged one by one with the plurality of threaded connecting cylinders on the fixed surface of the square rotating roller with the right side facing upwards are arranged in the synchronous lifting grabbing mechanism.
Preferably, the lifting actuator comprises a plurality of carry hydraulic cylinders which are vertically and reversely fixedly connected to the stroke adapter assembly, the output ends of the plurality of carry hydraulic cylinders are jointly and horizontally and fixedly connected with Contraband-shaped beams, the synchronous lifting and grabbing mechanism is assembled on the Contraband-shaped beams, the synchronous lifting and grabbing mechanism further comprises two grabbing hydraulic cylinders which are vertically fixed on the v-shaped 21274, two synchronous beams which are horizontally and fixedly connected between the output ends of the two grabbing hydraulic cylinders, and a key shaft guide rod which is horizontally and fixedly arranged on the v-shaped 21274; the synchronization beam is positioned above the Contraband-shaped beam; the plurality of lifting manipulators are uniformly distributed along the key shaft guide rod; the lifting manipulator comprises a vertical guide rod, two connecting rods and two lifting rods, wherein the vertical guide rod, the two connecting rods and the two lifting rods are vertically and slidably mounted on the lifting 21274; the lifting rod is installed on the key shaft guide rod in a sliding fit mode and is arranged oppositely, the horizontal rod section of the lifting rod is deviated to one side, opposite to the lifting rod, of the two lifting rods, and the lifting rod is connected with the vertical guide rod in a hinged mode through two ends of the connecting rod.
Preferably, the stroke adapting assembly comprises two lifting sliding plates which are vertically distributed and vertically slidably mounted on the detection bracket, the lifting sliding plates located at the upper positions are horizontally and fixedly connected to the bottom stress ends of the plurality of tension sensors, and the plurality of carry hydraulic cylinders are jointly and fixedly connected to the bottom ends of the lifting sliding plates located at the lower positions; and a plurality of stroke springs are vertically connected between the two lifting sliding plates and are uniformly distributed in a rectangular array.
Preferably, corner groove blocks are arranged at four corner side positions parallel to the axial direction of the square rotating roller, and a single-side clamping groove is correspondingly arranged on two adjacent square rotating roller fixing surfaces of the corner groove blocks; and a barrel pressing plate is slidably clamped and connected between the two unilateral clamping grooves on each fixed surface of the square rotary roller, and the barrel pressing plate is fixed on the fixed surface at the position and tightly presses all the threaded connecting barrels on the fixed surface.
Preferably, the station switching roller further comprises two rotary drums correspondingly and fixedly connected to two axial ends of the square rotary roller, and the station switching roller is horizontally and rotatably mounted on the detection support through the two rotary drums.
Preferably, the end of the rotating cylinder is coaxially provided with a jack disc, four positioning jacks are uniformly distributed on the jack disc around the axial circumference, and the positioning jacks penetrate through the disc surfaces on two sides of the jack disc; the switching locking mechanism comprises two rotating supporting frames which are horizontally arranged and fixedly installed on two sides of the detection support, a bidirectional screw rod is horizontally and rotatably installed between the two rotating supporting frames through a bearing, and the bidirectional screw rod penetrates through the axial center of the switching station roller; the rotating support frame is provided with at least one horizontal guide rod axially parallel to the bidirectional screw rod; the bidirectional screw is characterized in that two thread sections of the bidirectional screw are correspondingly and threadedly connected with positioning discs, the positioning discs are horizontally distributed in a mirror image mode and are arranged in a one-to-one correspondence mode with the jack discs, the positioning discs are adjacent to at least one horizontal guide rod in a sliding fit mode and are installed, and four locking pin rods capable of being inserted into the four jack holes in a one-to-one correspondence mode are arranged on the end face of each jack disc and face the positioning disc.
Preferably, the tension applying mechanism further comprises two jacking hydraulic cylinders vertically fixed on the detection support, and the lifting beam plate is horizontally fixed between the output ends of the two jacking hydraulic cylinders.
In addition, the invention also provides a method for detecting the strength of the metal fastener, which comprises the following steps: s1, randomly picking a plurality of the same size model of eye bolt fasteners for use to be tested.
S2, rotating and switching the fixed surface of one of the station switching rollers, which contains the threaded connecting cylinder matched with the eyebolt fastener to be detected in the S1, to face upwards by rotating the station switching roller; and then the station switching roller is locked and positioned by a switching locking mechanism.
And S3, sequentially screwing a plurality of randomly selected eye bolt fasteners in the plurality of threaded connecting cylinders in a one-to-one correspondence mode, and paying attention to the fact that the number of screwing turns of each eye bolt fastener is the same.
And S4, grabbing the lifting rings hooking the lifting bolt fasteners in a one-to-one correspondence mode through a plurality of lifting manipulators in the lifting execution mechanism.
And S5, providing a vertically upward jacking pulling force by the pulling force applying mechanism, indirectly applying an upward pulling force to the plurality of eyebolt fasteners synchronously by the stroke adapting assembly and the lifting executing mechanism, and gradually and intermittently increasing the pulling force.
S6, observing the deformation condition of each lifting bolt fastener under the tensile force while gradually and intermittently increasing the tensile force, stopping applying the tensile force when a crack appears at the screw position of one lifting bolt fastener or cracks appear at the screw positions of a plurality of lifting bolt fasteners at the same time, and recording the tensile force value fed back by the tension sensor at that time as the analysis data of the strength detection.
The technical scheme has the following advantages or beneficial effects: 1. the invention provides a metal fastener strength detection device, which adopts the same thread fastening and fixing mode as that of a lifting bolt fastener in actual lifting operation, eliminates the influence of a force application point on detection strength, can carry out batch synchronous detection on the lifting bolt fasteners of the same type and size, avoids the contingency in the detection process, can improve the accuracy and the authenticity of strength detection, and better reflects the average strength state of the detected fasteners.
2. The invention provides a metal fastener strength detection device, which can be used for detecting and fixing lifting bolts of different models and sizes and a plurality of lifting bolts of the same model and size in the same batch in a detection fixing device, so that the detection requirements of the lifting bolts of different models and sizes can be met, and meanwhile, the strength detection of batches can be realized.
3. The invention provides a metal fastener strength detection device, which can automatically and synchronously hook, pull and grab a plurality of lifting bolt fasteners fixed in a detection fixing device through a lifting execution mechanism, does not need manual operation, can ensure the consistency of the hooking, pulling and grabbing states of each lifting bolt, and is beneficial to indiscriminate strength detection.
Drawings
The invention and its features, aspects and advantages will become more apparent from the following detailed description of non-limiting embodiments, which is to be read in connection with the accompanying drawings. The drawings, in which like numerals refer to like parts throughout the several views and which are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a schematic perspective view of a metal fastener strength detection device according to the present invention.
FIG. 2 is a front view of a metal fastener strength detection apparatus provided by the present invention.
Fig. 3 is a partially enlarged schematic view at a in fig. 2.
Fig. 4 is a schematic perspective view of a partial structure of a metal fastener strength detection device provided by the invention.
Fig. 5 is a partially enlarged schematic view at B in fig. 4.
FIG. 6 is a top view of a partial structure of a metal fastener strength testing apparatus according to the present invention.
Fig. 7 is a cross-sectional view of C-C in fig. 6.
Fig. 8 is a cross-sectional view of D-D in fig. 6.
Fig. 9 is a schematic view of a threaded connection cartridge.
Figure 10 is a perspective view of an eye bolt fastener.
FIG. 11 is a flow chart of a method for detecting the strength of a metal fastener according to the present invention.
In the figure: 1. detecting the bracket; 11. a column; 111. a chute; 112. a slide rail; 2. detecting the fixing device; 21. switching station rollers; 211. rotating the roller in a square shape; 2111. a corner groove block; 2112. a unilateral clamping groove; 212. a threaded connection barrel; 213. pressing a cylinder plate; 214. a rotating drum; 215. a jack disc; 2151. positioning the jack; 22. a switching locking mechanism; 221. rotating the support frame; 2211. a horizontal guide rod; 222. a bidirectional lead screw; 2221. a hand wheel; 223. positioning a plate; 2231. a locking pin; 3. a tension applying mechanism; 31. a jacking hydraulic cylinder; 32. lifting the beam plate; 33. a tension sensor; 4. a journey adaptation component; 41. lifting the sliding plate; 42. a stroke spring; 5. a pull actuator; 51. a carry hydraulic cylinder; 52. contraband a beam; 53. synchronously lifting and pulling the grabbing mechanism; 531. a grabbing hydraulic cylinder; 532. a synchronization beam; 533. a lifting manipulator; 5331. a vertical guide rod; 5332. a connecting rod; 5333. lifting a pull rod; 534. a key shaft guide.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for the purpose of providing those skilled in the art with a more complete, accurate and thorough understanding of the concept and technical solution of the present invention, and to facilitate the implementation thereof, but not to limit the present invention.
As shown in fig. 1 and fig. 2, a metal fastener strength detection device comprises a detection bracket 1 for fixed support, wherein a detection fixing device 2 for fixing and detecting a metal fastener is assembled on the detection bracket 1; the detection bracket 1 is provided with a tension applying mechanism 3 for providing tension; the tension applying mechanism 3 is sequentially connected with a stroke adapting component 4 and a lifting actuating mechanism 5 from top to bottom; the lifting actuator 5 is positioned right above the detection fixture 2. Referring to fig. 10, which is a schematic perspective view of an eye bolt fastener to be inspected by the inspection apparatus of the present invention, the following description will be given of an example of the eye bolt fastener having the structure shown in fig. 10.
As shown in fig. 1, 2 and 4, the detecting bracket 1 includes two upright posts 11, a section of sliding groove 111 is vertically arranged on the upright posts 11 from the top end downwards, and a sliding rail 112 is arranged on the inner side wall of the upright posts 11 for vertical guiding. In order to improve the stability of the support of the detection bracket 1, the detection bracket 1 may be deeply buried in the ground and may be deeply buried and fixed by pouring concrete.
As shown in fig. 1, 2, 4, 5, 6, 7, 8 and 9, the inspection fixing device 2 includes a switching station roller 21 horizontally rotatably mounted on the inspection bracket 1 and capable of switching stations, and a switching lock mechanism 22 mounted on the inspection bracket 1 and positioning the switching station roller 21 after switching stations; the station switching roller 21 comprises a square rotating roller 211 with a square structure in an axial vertical section, four side surfaces of the square rotating roller 211 around the axial direction are fixing surfaces for four lifting bolt fasteners with different sizes, and five threaded connecting cylinders 212 which are detachably and fixedly arranged and are used for threaded fixed connection of the lifting bolt fasteners with the same size are uniformly distributed on each fixing surface along the axial direction, wherein the threaded connecting cylinders 212 are embedded on the fixing surfaces of the square rotating roller 211 in a spline fit mode; corner groove blocks 2111 are arranged at four corner side positions parallel to the axial direction of the square rotating roller 211, and unilateral clamping grooves 2112 are correspondingly arranged on the fixing surfaces of two adjacent square rotating rollers 211 of the corner groove blocks 2111; the cylinder pressing plate 213 is slidably clamped between the two unilateral clamping grooves 2112 on each fixing surface of the square rotating roller 211, and the cylinder pressing plate 213 is fixed on the fixing surface at the position through fastening bolts and presses all the threaded connection cylinders 212 on the fixing surface. That is, the barrel pressing plate 213 is locked on the fixing surface by a plurality of evenly distributed bolts, and on the other hand, the two long edges of the barrel pressing plate 213 are covered and compressed by the two unilateral slots 2112, so that the compression strength of the barrel pressing plate 213 on all the threaded connection barrels 212 on the fixing surface is ensured. The switching station roller 21 further comprises two rotary drums 214 correspondingly fixedly connected to the two axial end positions of the square rotary roller 211, in this embodiment, the rotary drums 214 and the end portions of the square rotary roller 211 are directly and preferably integrally formed, and the switching station roller 21 is horizontally and rotatably installed between the two upright posts 11 on the detection bracket 1 through the two rotary drums 214. The end of the rotary drum 214 is coaxially provided with a jack disc 215, in this embodiment, the jack disc 215 and the rotary drum 214 are also preferably integrally formed, four positioning jacks 2151 are uniformly distributed on the jack disc 215 around the axial circumference, and the positioning jacks 2151 penetrate through the disc surfaces on the two sides of the jack disc 215; the switching locking mechanism 22 comprises two rotating support frames 221 which are horizontally arranged and are welded on the two upright posts 11 in a one-to-one correspondence manner, a bidirectional screw 222 is horizontally and rotatably installed between the two rotating support frames 221 through a bearing, the bidirectional screw 222 penetrates through the axial center of the switching station roller 21, and hand wheels 2221 are fixedly assembled at two ends of the bidirectional screw 222; two horizontal guide rods 2211 axially parallel to the bidirectional screw 222 are arranged on the rotating support frame 221; the two thread sections of the bidirectional screw 222 are correspondingly and threadedly connected with positioning discs 223, the two positioning discs 223 are horizontally distributed in a mirror image mode and are arranged in one-to-one correspondence with the two jack discs 215, the positioning discs 223 are installed in sliding fit with the two adjacent horizontal guide rods 2211, and four locking pin rods 2231 capable of being inserted into the four positioning jacks 2151 in one-to-one correspondence are arranged on the end face, facing the jack discs 215, of the positioning discs 223.
The fixed stations of four fixed surfaces are arranged on the square rotary roller 211, and five threaded connecting cylinders 212 which are used for fastening and connecting the lifting bolts of the same model size in a threaded manner are uniformly distributed on each fixed surface, so that the batch tensile strength detection can be performed on the square rotary roller 211 aiming at the lifting bolts of four different model sizes, and it needs to be explained that the number of the model sizes and the types which can actually meet the detection is determined by a plurality of threaded connecting cylinders 212 corresponding to the matching sizes, and the strength detection of the lifting bolts which only can meet the four model sizes is determined by not only four fixed surfaces on the square rotary roller 211. Adopt threaded connection section of thick bamboo 212 and the cooperation of inlaying of square commentaries on classics roller 211 stationary plane, and the aim at that compresses tightly threaded connection section of thick bamboo 212 through pressing barrel plate 213, can dismantle the change fast threaded connection section of thick bamboo 212, dismantle the change and can change the threaded connection section of thick bamboo 212 of different model sizes on the one hand, so that carry out intensity to the eyebolt of different model sizes and detect, on the other hand, after carrying out many times tensile strength detection, threaded connection section of thick bamboo 212 bears the axial tension effect and causes its internal thread napping to warp the back, thereby then need to change corresponding threaded connection section of thick bamboo 212 and realize renewing.
When the strength of the lifting bolts is detected, in order to reflect the strength performance of the lifting bolts in the same production batch more truly, a plurality of lifting bolts can be randomly selected from the lifting bolts in the same production batch for strength detection. Before detection, the station switching roller 21 needs to be rotated, so that a fixed surface containing a threaded connecting cylinder 212 matched with an eyebolt to be detected is rotated and switched to a state with the right side facing upwards, then, under the condition that the state of the square rotating roller 211 is kept unchanged, a hand wheel 2221 on any side can be rotated to drive a bidirectional screw 222 to rotate, so that two positioning discs 223 are driven to move oppositely and approach through the bidirectional screw 222, four locking pin rods 2231 on the positioning discs 223 are correspondingly inserted into four positioning insertion holes 2151 of adjacent insertion hole discs 215 one by one, then the two positioning discs 223 and the insertion hole discs 215 at adjacent positions are in a matched insertion state, the circumferential position locking of the station switching roller 21 is realized, in order to improve the strength and stability of position locking, the two positioning discs 223 can be continuously driven to move oppositely, so that the positioning discs 223 are tightly attached to the insertion hole discs 215 at adjacent positions, so that the entire switching station roller 21 is further clamped between the two positioning discs 223.
After the station switching roller 21 is stably positioned, five eyebolts of the same type and size to be detected can be sequentially screwed into the five threaded connecting cylinders 212 on the fixing surface with the right side facing upwards in a one-to-one correspondence manner, so that the eyebolts are screwed and fixed as in actual hoisting operation, in addition, in order to control influence variables, each eyebolt needs to be almost completely screwed into the threaded connecting cylinder 212, but the same number of screwing turns of each eyebolt needs to be ensured.
As shown in fig. 1 and 2, the tension applying mechanism 3 includes two jacking hydraulic cylinders 31 vertically and fixedly mounted on the two upright posts 11 in a one-to-one correspondence manner, a lifting beam plate 32 vertically and slidably mounted between the two sliding grooves 111, and five tension sensors 33 fixedly connected to the bottom ends of the lifting beam plate 32 at the top stress ends through bolts, wherein the tension sensors 33 can be any type of sensors on the market; the lifting beam plate 32 is welded between the output ends of the two jacking hydraulic cylinders 31; five tension sensors 33 are arranged corresponding to five threaded connecting cylinders 212 on the same fixed surface of the square rotating roller 211 one by one, so that when the tension strength of five suspension bolts of the same type and size is detected, the tension state can be uniformly shared and displayed on the five tension sensors 33; the bottom stress ends of the five tension sensors 33 are fixedly connected to the stroke adapting assembly 4 through bolts; the lifting actuator 5 comprises a synchronous lifting grabbing mechanism 53, and five lifting manipulators 533 which are vertically opposite to the five threaded connecting cylinders 212 on the fixed surface of the square rotating roller 211 with the front surface facing upwards are arranged in the synchronous lifting grabbing mechanism 53.
As shown in fig. 1, 2 and 3, the lifting actuator 5 comprises three carry hydraulic cylinders 51 fixedly connected to the stroke adapter assembly 4 in a vertically inverted manner through bolts, Contraband beam 52 is horizontally welded to the output ends of the three carry hydraulic cylinders 51, the synchronous lifting grabbing mechanism 53 is assembled on the 21274, the synchronous lifting grabbing mechanism 53 further comprises two grabbing hydraulic cylinders 531 vertically fixed at the two side ends of the Contraband beam 52, a synchronous beam 532 horizontally welded between the output ends of the two grabbing hydraulic cylinders 531 and a key shaft guide rod 534 horizontally welded on the Contraband beam 52; synchronization beam 532 is positioned above Contraband beam 52; the five lifting manipulators 533 are uniformly distributed along the key shaft guide rod 534; the lifting manipulator 533 comprises a vertical guide rod 5331 vertically and slidably mounted on the Contraband beam 52, two connecting rods 5332 and two lifting rods 5333; the vertical guide rod 5331 is welded with the synchronous beam 532, the lifting rod 5333 is L-shaped, the two lifting rods 5333 are arranged on the key shaft guide rod 534 in a sliding fit mode and are arranged oppositely, the horizontal rod section of the lifting rod 5333 deviates to one side, opposite to the two lifting rods 5333, of the lifting rod 5333, and the lifting rod 5333 and the vertical guide rod 5331 are hinged through two ends of a connecting rod 5332.
As shown in fig. 1 and 2, the stroke adapting assembly 4 includes two lifting sliding plates 41 which are distributed up and down and vertically slidably mounted between the two side sliding rails 112, the lifting sliding plate 41 located at the upper position is horizontally and fixedly connected to the bottom force bearing ends of the five tension sensors 33 through bolts, and the three carry hydraulic cylinders 51 are jointly and fixedly connected to the bottom ends of the lifting sliding plates 41 located at the lower position through bolts; a plurality of stroke springs 42 are vertically welded between the two lifting sliding plates 41, and the stroke springs 42 are uniformly distributed in a rectangular array.
After five lifting bolts to be detected are fixed on the square rotating roller 211, the lifting execution mechanism 5 can be used for carrying out hook-pull grabbing on the lifting bolts, in the initial state, the elongation of the output rods of the two grabbing hydraulic cylinders 531 is zero, namely, the two lifting rods 5333 in each lifting manipulator 533 are in the maximum separation state, when grabbing, firstly, the three carry hydraulic cylinders 51 are synchronously started, so that the Contraband beam 52 and the synchronous lifting grabbing mechanism 53 are driven to synchronously descend until the lifting rods 5333 can be aligned with lifting ring holes of the lifting bolts, then the two grabbing hydraulic cylinders 531 are synchronously started, so that the synchronous beam 532 is driven to ascend, so that the synchronous beam 532 drives the five vertical guide rods 5331 to upwards slide, then in each lifting manipulator 533, the vertical guide rods 5331 pull the two lifting rods 5333 to mutually approach along the key shaft guide rod 534 through the two connecting rods 5332, so that the horizontal rod ends of the two lifting rods 5333 are finally contacted and closed, the lifting manipulator 533 finishes hooking and pulling the eyebolt.
Then, performing formal tension strength detection, specifically, by synchronously starting two jacking hydraulic cylinders 31 to drive five tension sensors 33 to vertically and synchronously lift up along with the lifting beam plate 32, and with the upward output of the jacking hydraulic cylinders 31, the stroke adapting assembly 4 integrally slides upward along the slide rails 112 at two sides for a certain distance, so that the whole lifting actuator 5 synchronously lifts up for a corresponding height, thereby the lifting manipulator 533 is in a tensioned state for the lifting bolt, and with the continuous lifting and pulling, because the lifting bolt is fixed on the square rotating roller 211 and basically keeps stationary, in the stroke adapting assembly 4, the lifting sliding plate 41 at the lower part will also basically maintain a stationary state, and the lifting sliding plate 41 at the upper part will synchronously lift up along with the five tension sensors 33, and a plurality of stroke springs 42 will be synchronously stretched, that is, the tension will be accumulated and transferred to the stroke springs 42, and then, continuously lifting upwards, wherein the pulling force is gradually increased, when the lifting sliding plate 41 positioned below generates a trace amount of upward displacement, namely the lifting bolts reach the strength limit, one of the five detected lifting bolts firstly has a fracture crack, or a plurality of lifting bolts simultaneously have fracture cracks, in which case, after the fracture cracks of the lifting bolts in the detection, the continuous application of the lifting pulling force is stopped, and the value of the pulling force sensor 33 when the cracks appear is recorded. In addition, in order to facilitate the observation of cracks, a high-speed camera can be arranged near the eyebolt to be detected for magnifying shooting, and the strength can be detected by gradually and intermittently increasing the jacking pressure.
In addition, as shown in fig. 11, the present invention also provides a method for detecting the strength of a metal fastener, comprising the steps of: s1, randomly selecting a plurality of eyebolt fasteners with the same size and model to be detected so as to improve the randomness and the authenticity of detection of a detection sample; the method can carry out multi-batch strength detection, and then the average value of a plurality of times of strength detection is obtained to be used as the strength detection value of the type size of the eye bolt.
S2, rotating and switching the fixed surface of one of the station switching rollers 21, which contains the threaded connecting cylinder 212 matched with the eyebolt fastener to be detected in the S1, to face upwards by rotating the station switching rollers 21; switching station roller 21 is locked and positioned through switching locking mechanical system 22 afterwards to conveniently carry out zero degree tensile strength detection through applying jacking pulling force after the location.
S3, a plurality of randomly selected eye bolt fasteners are sequentially tightened in a one-to-one correspondence in the plurality of threaded connection barrels 212, noting that the number of tightening turns for each eye bolt fastener is the same. The fastening mode of the threaded matching of the suspension bolt and the threaded connecting cylinder 212 is the same as that of the actual hoisting operation, so that the strength detection has an actual reference value.
And S4, grabbing the lifting rings hooking the lifting bolt fasteners in a one-to-one correspondence mode through the plurality of lifting manipulators 533 in the lifting actuating mechanism 5. The eye bolt is directly pulled by the lifting manipulator 533.
S5, providing vertical upward jacking tension by applying the tension mechanism 3, indirectly applying upward tension to a plurality of eye bolt fasteners synchronously by the stroke adapting assembly 4 and the lifting executing mechanism 5, gradually and intermittently increasing the tension, and conveniently observing the state of the eye bolt by adopting an intermittent force application mode.
S6, observing the deformation condition of each lifting bolt fastener under the tension while gradually and intermittently increasing the tension, stopping applying the tension when a crack appears at the screw position of one lifting bolt fastener or cracks appear at the screw positions of a plurality of lifting bolt fasteners at the same time, and recording the tension value fed back by the tension sensor 33 at that time as the analysis data of the strength detection.
It should be understood by those skilled in the art that the modifications can be implemented by combining the prior art and the above embodiments, and the detailed description is omitted here. Such variations do not affect the essence of the present invention and are not described herein.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be modified, without departing from the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (8)
1. The utility model provides a metal fastener intensity detection device which characterized in that: the device comprises a detection bracket (1) for fixed support, wherein a detection fixing device (2) for fixing a detection metal fastener is assembled on the detection bracket (1); a tension applying mechanism (3) for providing tension is assembled on the detection bracket (1); the tension applying mechanism (3) is sequentially connected with a stroke adapting component (4) and a lifting executing mechanism (5) from top to bottom; the lifting executing mechanism (5) is positioned right above the detection fixing device (2); wherein:
the detection fixing device (2) comprises a switching station roller (21) which is horizontally and rotatably arranged on the detection support (1) and can rotate to switch stations, and a switching locking mechanism (22) which is assembled on the detection support (1) and used for positioning the switching station roller (21) after station switching; the station switching roller (21) comprises a square rotating roller (211) with a square structure in the axial vertical section, four side surfaces of the square rotating roller (211) around the axial direction are fixing surfaces for lifting bolt fasteners of four different sizes, and a plurality of threaded connecting cylinders (212) which are detachably and fixedly arranged and are used for fixedly connecting the lifting bolt fasteners of the same size in a threaded manner are uniformly distributed on each fixing surface along the axial direction;
the tension applying mechanism (3) comprises a lifting beam plate (32) vertically and slidably mounted at the top of the detection bracket (1) and a plurality of tension sensors (33) with top stress ends fixedly connected to the bottom end of the lifting beam plate (32); the plurality of tension sensors (33) and the plurality of threaded connecting cylinders (212) are arranged on the same fixed surface of the square rotating roller (211) in a one-to-one correspondence mode; the bottom stress ends of the tension sensors (33) are jointly and fixedly connected to the stroke adapting assembly (4); the lifting executing mechanism (5) comprises a synchronous lifting grabbing mechanism (53), and a plurality of lifting manipulators (533) which are vertically opposite to the plurality of threaded connecting cylinders (212) on the fixed surface of the square rotating roller (211) with the front surface facing upwards are arranged in the synchronous lifting grabbing mechanism (53).
2. The metal fastener strength detection device according to claim 1, wherein: the lifting actuator (5) comprises a plurality of carry hydraulic cylinders (51) which are vertically and inversely fixedly connected to the stroke adapter assembly (4), the output ends of the plurality of carry hydraulic cylinders (51) are jointly and horizontally and fixedly connected with Contraband beam (52), the synchronous lifting grabbing mechanism (53) is assembled on the Contraband beam (52), the synchronous lifting grabbing mechanism (53) further comprises two grabbing hydraulic cylinders (531) which are vertically fixed at the two side ends of the Contraband beam (52), a synchronous beam (532) which is horizontally and fixedly connected between the output ends of the two grabbing hydraulic cylinders (531) and a key shaft guide rod (534) which is horizontally and fixedly installed on the Contraband beam (52); the synchronization beam (532) is located above the Contraband-shaped beam (52); the plurality of lifting manipulators (533) are uniformly distributed along the key shaft guide rod (534); the lifting manipulator (533) comprises a vertical guide rod (5331), two connecting rods (5332) and two lifting rods (5333), wherein the vertical guide rod (5331), the two connecting rods (5332) and the two lifting rods (5333) are vertically installed on the Contraband beam (52) in a sliding fit mode; the vertical guide rod (5331) is fixedly connected with the synchronous beam (532), the lifting rods (5333) are L-shaped, the two lifting rods (5333) are installed on the key shaft guide rod (534) in a sliding fit mode and are arranged oppositely, the horizontal rod sections of the lifting rods (5333) are deviated to the two opposite sides of the lifting rods (5333), and the lifting rods (5333) are hinged to the vertical guide rod (5331) through two ends of the connecting rod (5332).
3. The metal fastener strength detection device according to claim 2, wherein: the stroke adapting assembly (4) comprises two lifting sliding plates (41) which are vertically distributed and vertically slidably mounted on the detection support (1), the lifting sliding plates (41) positioned at the upper positions are horizontally and fixedly connected to the bottom stress ends of the tension sensors (33), and the carrying hydraulic cylinders (51) are jointly and fixedly connected to the bottom ends of the lifting sliding plates (41) positioned at the lower positions; a plurality of stroke springs (42) are vertically connected between the two lifting sliding plates (41), and the stroke springs (42) are uniformly distributed in a rectangular array.
4. The metal fastener strength detection device according to claim 1, wherein: corner groove blocks (2111) are arranged at four corner side positions parallel to the axial direction of the square rotating roller (211), and unilateral clamping grooves (2112) are correspondingly arranged on the fixing surfaces of two adjacent square rotating rollers (211) of the corner groove blocks (2111); and a barrel pressing plate (213) is slidably clamped between the two unilateral clamping grooves (2112) on each fixing surface of the square rotating roller (211), and the barrel pressing plate (213) is fixed on the fixing surface at the position and presses all the threaded connecting barrels (212) on the fixing surface.
5. The metal fastener strength detection device according to claim 1, wherein: the station switching roller (21) further comprises two rotary drums (214) which are correspondingly and fixedly connected to the two axial ends of the square rotary roller (211), and the station switching roller (21) is horizontally and rotatably installed on the detection support (1) through the two rotary drums (214).
6. The metal fastener strength detection device according to claim 5, wherein: the end part of the rotary drum (214) is coaxially provided with a jack disc (215), four positioning jacks (2151) are uniformly distributed on the jack disc (215) around the axial circumference, and the positioning jacks (2151) penetrate through the disc surfaces on the two sides of the jack disc (215); the switching locking mechanism (22) comprises two rotating supporting frames (221) which are horizontally arranged and fixedly mounted on two sides of the detection support (1), a bidirectional screw (222) is horizontally and rotatably mounted between the two rotating supporting frames (221) through a bearing, and the bidirectional screw (222) penetrates through the axial center of the station switching roller (21); the rotating support frame (221) is provided with at least one horizontal guide rod (2211) which is axially parallel to the two-way screw rod (222); two threaded sections of the bidirectional screw rod (222) are correspondingly and threadedly connected with positioning discs (223), two positioning discs (223) are horizontally distributed in a mirror mode and are arranged in a one-to-one correspondence mode with the jack discs (215), the positioning discs (223) are adjacent to at least one horizontal guide rod (2211) in a sliding fit mode and are installed, four locking pin rods (2231) capable of being inserted into four positioning insertion holes (2151) in a one-to-one correspondence mode are arranged on the end face, facing the jack discs (215), of the positioning discs (223).
7. The metal fastener strength detection device according to claim 1, wherein: the tension applying mechanism (3) further comprises two jacking hydraulic cylinders (31) vertically fixed on the detection support (1), and the lifting beam plate (32) is horizontally fixed between the output ends of the two jacking hydraulic cylinders (31).
8. A method for detecting the strength of a metal fastener is characterized by comprising the following steps: the method for detecting the strength of the metal fastener by using the metal fastener strength detection device as claimed in any one of claims 1 to 7 comprises the following steps:
s1, randomly selecting a plurality of lifting bolt fasteners with the same size and model for detection;
s2, rotating and switching the fixed surface of one of the station switching rollers (21), which contains the threaded connecting cylinder (212) matched with the eyebolt fastener to be detected in S1, to face upwards by rotating the station switching rollers (21); then, the switching station roller (21) is locked and positioned by a switching locking mechanism (22);
s3, sequentially screwing a plurality of randomly selected eye bolt fasteners in a plurality of threaded connecting cylinders (212) in a one-to-one correspondence manner, and paying attention to the fact that the number of screwing turns of each eye bolt fastener is the same;
s4, grabbing hanging rings hooking a plurality of hanging ring bolt fasteners in a one-to-one correspondence mode through a plurality of lifting manipulators (533) in the lifting executing mechanism (5);
s5, providing vertical upward jacking tension by the tension applying mechanism (3), indirectly applying upward tension to a plurality of eyebolt fasteners synchronously by the stroke adapting assembly (4) and the lifting executing mechanism (5), and gradually and intermittently increasing the tension;
s6, observing the deformation condition of each lifting bolt fastener under the tensile force while gradually and intermittently increasing the tensile force, stopping applying the tensile force when a crack appears at the screw position of one lifting bolt fastener or a plurality of lifting bolt fasteners simultaneously appear at the screw position, and recording the tensile force value fed back by the tension sensor (33) at that time as the analysis data of the strength detection.
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