CN112791986A

CN112791986A - Pin shaft hardness detection device

Info

Publication number: CN112791986A
Application number: CN202011532210.7A
Authority: CN
Inventors: 陈金贵; 江海彬; 庞国平
Original assignee: Vscan Xiamen Intelligent Technology Co ltd
Current assignee: Vscan Xiamen Intelligent Technology Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-05-14

Abstract

The invention relates to a pin shaft hardness detection device which comprises a cabinet, and a stirring mechanism, a storage hopper, a vertical blanking channel, a counter-rolling material distribution mechanism, a hardness detection mechanism and an NG sorting mechanism which are sequentially arranged in the cabinet from top to bottom, wherein the stirring mechanism is used for stirring a pin shaft to be detected in the storage hopper, so that the pin shaft enters the vertical blanking channel through a blanking port of the storage hopper, the vertical blanking channel penetrates through a feeding port connected with the hardness detection mechanism from a pair of rollers of the counter-rolling material distribution mechanism, the distance between the pair of rollers is slightly smaller than the diameter of the pin shaft and rotates oppositely, the hardness detection mechanism is used for detecting the hardness of the pin shaft, and the NG sorting mechanism is used for sorting the pin shaft into an OK material box and an NG material box according to the detection result of the hardness. The automatic sorting machine is ingenious in structural design, the conveying of the workpieces is realized by utilizing gravity, the cost is saved, meanwhile, qualified products and unqualified products can be automatically sorted, and the product percent of pass is improved.

Description

Pin shaft hardness detection device

Technical Field

The invention relates to the technical field of hardness detection, in particular to a pin shaft hardness detection device.

Background

In the production process of the pin shaft, the hardness of the pin shaft needs to be detected so as to prevent unqualified products from flowing into the market and further bring adverse effects to users. Most of the existing pin shaft hardness detection devices adopt manual work for detection, workers feel fatigue easily, the working efficiency is low, meanwhile, the phenomenon of false detection easily occurs, and the customer satisfaction is influenced.

Disclosure of Invention

The invention aims to provide a pin shaft hardness detection device to solve the problems. Therefore, the invention adopts the following specific technical scheme:

the utility model provides a round pin axle hardness detection device, its includes the rack and from the top down arranges in proper order rabbling mechanism, storage hopper, vertical unloading passageway, to rolling feed mechanism, hardness detection mechanism and NG sorting mechanism in the rack, the rabbling mechanism is used for stirring the round pin axle of waiting to detect in the storage hopper, makes the round pin axle pass through the feed opening of storage hopper gets into vertical unloading passageway, vertical unloading passageway from pass between a pair of gyro wheel of rolling feed mechanism connect in the feed inlet of hardness detection mechanism, the interval between a pair of gyro wheel slightly is less than the diameter of round pin axle and rotation in opposite directions, hardness detection mechanism is used for to the hardness of round pin axle detects, NG sorting mechanism is used for according to hardness detection mechanism's testing result with the round pin axle is sorted to OK workbin and NG workbin.

Furthermore, the pin shaft hardness detection device is double-station and comprises two stirring rods, two storage hoppers, two vertical blanking channels, two rolling and distributing mechanisms, two hardness detection mechanisms and two NG sorting mechanisms which are arranged on the left and right.

Further, two stirring rods are driven by a stirring motor, and two NG sorting mechanisms share one OK bin.

Furthermore, the storage hopper is in an inverted quadrangular pyramid shape, and a chute feeding port is arranged above the storage hopper.

Furthermore, the vertical blanking channel is a hose with certain hardness, and the inner diameter of the hose is slightly larger than the pin shaft.

Furthermore, an upper sensor and a lower sensor are respectively arranged above and below the pair of rollers, the upper sensor is used for sensing a workpiece incoming material signal and giving the motor in driving connection with the pair of rollers, and the lower sensor is used for sensing a workpiece discharging signal and giving the hardness detection mechanism.

Further, the roller is a polyurethane wheel.

Furthermore, the hardness detection mechanism comprises a probe, a probe seat, a blocking piece and an electric push rod, wherein the probe is fixed to the top of the probe seat, the probe is a through type eddy current probe, the upper end of an axial through hole of the probe is a feed inlet, the probe seat is provided with a second axial through hole coaxial with the axial through hole and a radial through groove communicated with the second axial through hole, and the blocking piece is arranged in the radial through groove in a penetrating manner and connected with the electric push rod.

Furthermore, the sorting mechanism comprises a bottom plate, a sorting motor and a sorting rod, the sorting rod and the sorting motor are respectively positioned on the front side and the back side of the bottom plate, and the cover plate is fixedly covered on the front side of the bottom plate; the sorting motor is characterized in that the bottom plate is vertically arranged, a collecting channel and an OK channel and an NG channel which are arranged side by side are arranged on the front surface of the bottom plate, the upper end of the collecting channel is communicated with the axial through hole, the lower end of the collecting channel is communicated with the OK channel and the NG channel, the OK channel and the NG channel are respectively communicated with the OK material box and the NG material box, the sorting rod is fixed on an output shaft of the sorting motor and positioned at the joint of the collecting channel and the OK channel and the NG channel, and the collecting channel can be communicated with the OK channel or the NG channel under the driving of the sorting motor.

Furthermore, the sorting rod is in a wedge shape, the head end of the sorting rod is fixed on the output shaft of the sorting motor, and the tip end of the sorting rod is obliquely and upwards lapped on one side wall of the collecting channel.

By adopting the technical scheme, the invention has the beneficial effects that: the automatic sorting machine is ingenious in structural design, the conveying of the workpieces is realized by utilizing gravity, the cost is saved, meanwhile, qualified products and unqualified products can be automatically sorted, and the product percent of pass is improved.

Drawings

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

FIG. 1 is a perspective view of a pin hardness testing apparatus of the present invention;

FIG. 2 is a cross-sectional perspective view of the pin hardness testing apparatus shown in FIG. 1;

FIG. 3 is a perspective view of a stirring mechanism of the pin hardness testing apparatus shown in FIG. 2;

fig. 4 is a perspective view of a roll separating mechanism of the pin hardness testing apparatus shown in fig. 2;

fig. 5 is a perspective view of a hardness detection mechanism of the pin hardness detection apparatus shown in fig. 2;

FIG. 6 is a cross-sectional view of the hardness detecting mechanism shown in FIG. 5;

fig. 7 is a perspective view of the NG sorting mechanism of the pin hardness detecting apparatus shown in fig. 2.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 and 2, a pin hardness detection device may include a cabinet 1, and a stirring mechanism 2, a storage hopper 3, a vertical blanking channel 4, a counter-rolling material distribution mechanism 5, a hardness detection mechanism 6, and an NG sorting mechanism 7, which are sequentially arranged in the cabinet 1 from top to bottom. In the embodiment shown, the pin shaft hardness detection device is double-station, namely, the pin shaft hardness detection device is provided with two sets of parallel hardness detection units (a stirring mechanism 2, a storage hopper 3, a vertical blanking channel 4, a pair-rolling material distribution mechanism 5, a hardness detection mechanism 6 and an NG sorting mechanism 7). The cabinet 1 is a rectangular parallelepiped structure and can be made of aluminum or steel materials. The cabinet 1 is provided with a corresponding cabinet door for convenient installation, operation and maintenance. The cabinet 1 is provided with a corresponding touch screen 9, and the touch screen 9 is connected with a PLC system (not shown) installed in the cabinet 1 so as to realize automatic detection of the hardness of the pin shaft. The bottom of the cabinet 1 is also provided with casters 11 to facilitate movement.

As shown in fig. 2 and 3, the stirring mechanism 2 is used for stirring the pin shaft to be detected in the storage hopper 3, so that the pin shaft enters the vertical blanking channel 4 through the blanking port 31 of the storage hopper 3. Specifically, the stirring mechanism 2 includes a stirring motor 21, two stirring rods 22 and a synchronous belt pulley 23, wherein the stirring motor 21 is fixedly installed at the top of the cabinet 1, and the two stirring rods 22 are respectively suspended in the two storage hoppers 3 and are in driving connection with the stirring motor 21 through the synchronous belt pulley 23. The lower part of the stirring rod 22 is covered with a layer of buffer material 221 so that the stirring rod 22 can be damaged by collision with the pin shaft. The storage hopper 3 is prevented from being in an inverted quadrangular pyramid shape, the feed opening 31 is positioned in the middle of the bottom (namely, the conical top), the size of the feed opening is larger than the diameter of the pin shaft and smaller than 2 times of the diameter of the pin shaft, and only one pin shaft enters the feed opening at each time. The storage hopper 3 may be welded from aluminum sheet. For feeding convenience, a chute feed opening 32 is arranged above the storage hopper 3. The chute feed opening 32 is located in the back of the cabinet 1. The upper end of the vertical blanking channel 4 is connected to the blanking opening 31 and extends downward from between a pair of rollers 52 of the pair of roller distributing mechanisms 5 through the feeding opening connected to the hardness detecting mechanism 6. The vertical blanking channel 4 may typically be a flexible tube having a hardness that is slightly larger in diameter than the pin so that the pin is substantially aligned therein. The vertical feed channel 4 can be sleeved on the feed opening 31 and fixed by means of a clamp or the like, so that the assembly and disassembly are convenient. Preferably, a sensor 33 is further installed near the feed opening 31, and the sensor 33 is used for detecting whether the storage hopper 3 has a pin shaft. The sensor 33 may be a hall switch.

As shown in fig. 4 and 5, the roll separating mechanism 5 may include two motors 51 and a pair of rollers 52 fixed to output shafts of the two motors 51, respectively. The two motors 51 are fixed to two brackets 55, and one of the two brackets 55 is fixed and the other is movable relative to the other, and connected by a spring. The spacing between the pair of rollers 52 is slightly less than the diameter of the pin and rotate toward one another so that the pin can be controlled to move downward. By controlling the rotation speed of the motor 51, the falling speed and the beat of the pin can be controlled. The roller 52 is typically made of a soft elastic material. Preferably, the rollers 52 are polyurethane wheels.

Upper sensors

53 and 54 are respectively arranged above and below the pair of rollers 52, wherein the upper sensor 53 is used for sensing a workpiece feeding signal to the motor 51, and the lower sensor 54 is used for sensing a workpiece discharging signal to the hardness detection mechanism 6. Specifically, when the upper sensor 53 detects the pin, the two motors 51 rotate in opposite directions to move the pin downward, and when the lower sensor 54 senses the pin, the electric push rod 64 of the hardness detection mechanism 6 acts to push the blocking piece 63 to stop the pin in the probe seat 62, so as to perform hardness detection. The upper sensor 53 and the lower sensor 54 may be hall switches or the like. In the case where the vertical blanking channel 4 is transparent, the upper sensor 53 and the lower sensor 54 may also be photoelectric switches.

As shown in fig. 2, 5 and 6, the hardness detecting mechanism 6 may include a probe 61, a probe holder 62, a barrier 63 and an electric push rod 64, wherein the probe 61 is fixed to the probe holder 62. The probe 61 is a feed-through eddy current probe. The probe 61 and probe holder 62 have coaxial axial through

holes

611 and 621, respectively. The probe block 62 has a radial through slot 622 in communication with the axial through hole 621. The axial through hole 611 is a feed inlet of the hardness detection mechanism 6, and the lower end of the axial through hole 621 is a discharge outlet. The stop piece 63 is arranged in the radial through groove 622 in a penetrating way and is connected with the electric push rod 64. Specifically, the end of the electric plunger 64 is provided with a slot 641 and a first pin hole 642 penetrating both sides of the slot 641, the blocking piece 63 is provided with a second pin hole 631, the blocking piece 63 is inserted into the slot 641 such that the first pin hole 642 is aligned with the second pin hole 631, and then the blocking piece 63 is fixedly connected to the electric plunger 64 by being inserted into the first pin hole 642 and the second pin hole 631 through positioning pins (not shown). It should be understood that the electric push rod 64 may be replaced with other electric telescopic structures. When the lower sensor 54 senses the pin shaft, the electric push rod 64 extends out to enable the blocking piece 63 to enter the axial through hole 621, so that the pin shaft 100 to be detected stays in the axial through hole 611 of the probe 61, and hardness detection can be performed. After the detection is completed, the electric push rod 64 retracts, the blocking piece 63 leaves the axial through hole 621, and the pin shaft falls to the sorting mechanism 7 under the action of gravity. The hardness detection mechanism 6 is also provided with a comparison probe 65, and the comparison probe 65 is the same as the detection probe 61 and is used for detecting the standard pin shaft. Through comparison probe 65, when detecting the round pin axle of different specifications, can need not carry out corresponding detection standard setting, only need with standard round pin axle put in comparison probe 65's axial through-hole can. When the detection signal of the probe 61 is within the standard signal range of the comparison probe 65, it indicates that the pin is qualified (OK), otherwise it indicates that the pin is not qualified (NG).

As shown in fig. 2 and 7, the sorting mechanism 7 includes a bottom plate 71, a cover plate 72, a sorting motor 73, and a sorting bar 74. Wherein, the sorting rod 74 and the sorting motor 73 are respectively positioned on the front and the back of the bottom plate 71. A cover plate 72 is fixedly overlaid (e.g., by screws) on the front face of the base plate 71. The bottom plate 71 is placed vertically, and has a collecting passage 711 and OK and

NG passages

712 and 713 side by side on the front surface thereof, the collecting passage 711 communicating at the upper end with the discharge port (i.e., the lower end of the axial through-hole 621) of the hardness detecting mechanism 6, and communicating at the lower end with the OK and

NG passages

712 and 713. The OK channel 712 and the NG channel 713 lead to the OK tank 81 and the NG tank 82, respectively, for example via respective connecting pipes. The sorting bar 74 is fixed to an output shaft of the sorting motor 73 at the junction of the collecting channel 711 with the OK channel 712 and the NG channel 713. In the exemplary embodiment shown, the sorting bar 74 is wedge-shaped, the head end of which is fixed to the output shaft of the sorting motor 73 and the tip end of which overlaps one of the side walls of the collecting channel 711 at an angle upwards. When the detection result of the hardness detection mechanism 6 is OK, the sorting motor 73 drives the sorting rod 74 to rotate, so that the sorting rod blocks the NG channel 713, and the collecting channel 711 is communicated with the OK channel 712; when the hardness detection mechanism 6 detects NG, the sorting motor 73 rotates the sorting rod 74 to block the OK passage 712, and the collecting passage 711 communicates with the NG passage 713.

In the illustrated embodiment, two NG sortation mechanisms 6 share one OK bin 81. This can make the entire structure more compact. It should be understood that two NG sortation mechanisms 6 may have separate OK bins and NG bins, or share an OK bin and/or an NG bin.

The operation of the pin hardness testing device of the present invention will be briefly described. Respectively placing a pin shaft to be detected and a corresponding standard pin shaft into the detection positions of the storage hopper 3 and the comparison probe 65, performing related parameter setting operation on the touch screen 8, starting a detection program, rotating the stirring motor 21 to enable the pin shaft to enter the vertical blanking channel 4, enabling the pin shaft to fall along the vertical blanking channel 4 under the action of gravity, rotating the motor 51 of the rolling and distributing mechanism 5 when the upper sensor 53 detects the pin shaft, enabling the pair of rollers 52 to rotate oppositely, further enabling the pin shaft to move downwards in sequence, enabling the electric push rod 64 to extend out when the lower sensor 54 senses the pin shaft, enabling the blocking piece 63 to enter the axial through hole 621, enabling the pin shaft 100 to be detected to stay in the axial through hole 611, and enabling hardness detection to be performed; after the detection is finished, the electric push rod 64 retracts, the blocking piece 63 leaves the axial through hole 621, and the pin shaft falls to the sorting mechanism 7 under the action of gravity; when the detection result of the hardness detection mechanism 6 is OK, the sorting motor 73 drives the sorting rod 74 to rotate, so that the sorting rod blocks the NG channel 713, meanwhile, the collecting channel 711 is communicated with the OK channel 712, and the pin shaft falls into the OK material box 81 under the action of gravity; when the hardness detection mechanism 6 detects NG, the sorting motor 73 drives the sorting rod 74 to rotate, so that the OK channel 712 is blocked, the collecting channel 711 is communicated with the NG channel 713, and the pin falls into the NG bin 82 under the action of gravity. The whole detection process does not need manual intervention, and the detection efficiency is high.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A pin shaft hardness detection device is characterized by comprising a cabinet, and a stirring mechanism, a storage hopper, a vertical blanking channel, a counter-rolling material distribution mechanism, a hardness detection mechanism and an NG sorting mechanism which are sequentially arranged in the cabinet from top to bottom, the stirring mechanism is used for stirring a pin shaft to be detected in the storage hopper, so that the pin shaft enters the vertical blanking channel through a blanking port of the storage hopper, the vertical blanking channel penetrates through a feeding hole connected with the hardness detection mechanism from between a pair of rollers of the pair of roller material distribution mechanisms, the distance between the pair of rollers is slightly smaller than the diameter of the pin shaft and the rollers rotate oppositely, the hardness detection mechanism is used for detecting the hardness of the pin shaft, and the NG sorting mechanism is used for sorting the pin shafts into an OK material box and an NG material box according to the detection result of the hardness detection mechanism.

2. The pin shaft hardness detection device according to claim 1, wherein the pin shaft hardness detection device is double-station and comprises two stirring rods, two storage hoppers, two vertical blanking channels, two opposite rolling material distribution mechanisms, two hardness detection mechanisms and two NG sorting mechanisms which are arranged left and right.

3. The pin hardness detecting device according to claim 2, wherein two stirring rods are driven by one stirring motor, and two NG sorting mechanisms share one OK box.

4. The pin shaft hardness detecting device according to claim 1, wherein the storage hopper is in the shape of an inverted quadrangular pyramid, and an inclined feed port is arranged above the storage hopper.

5. The apparatus for testing the hardness of a pin according to claim 1, wherein said vertical feed channel is a flexible tube having a hardness and an inner diameter slightly larger than said pin.

6. The pin shaft hardness detection device according to claim 5, wherein an upper sensor and a lower sensor are respectively arranged above and below the pair of rollers, the upper sensor is used for sensing a workpiece incoming signal and a motor in driving connection with the pair of rollers, and the lower sensor is used for sensing a workpiece outgoing signal and a hardness detection mechanism.

7. The pin hardness detection device of claim 5, wherein said roller is a polyurethane wheel.

8. The pin shaft hardness detection device according to claim 1, wherein the hardness detection mechanism comprises a probe, a probe seat, a barrier sheet and an electric push rod, the probe is fixed on the top of the probe seat, the probe is a through eddy current probe, a feed port is arranged at the upper end of an axial through hole of the probe, the probe seat is provided with a second axial through hole coaxial with the axial through hole and a radial through groove communicated with the second axial through hole, and the barrier sheet is arranged in the radial through groove in a penetrating manner and connected with the electric push rod.

9. The pin shaft hardness detection device according to claim 8, wherein the sorting mechanism comprises a bottom plate, a cover plate, a sorting motor and a sorting rod, the sorting rod and the sorting motor are respectively positioned on the front and the back of the bottom plate, and the cover plate is fixedly covered on the front of the bottom plate; the sorting motor is characterized in that the bottom plate is vertically arranged, a collecting channel and an OK channel and an NG channel which are arranged side by side are arranged on the front surface of the bottom plate, the upper end of the collecting channel is communicated with the axial through hole, the lower end of the collecting channel is communicated with the OK channel and the NG channel, the OK channel and the NG channel are respectively communicated with the OK material box and the NG material box, the sorting rod is fixed on an output shaft of the sorting motor and positioned at the joint of the collecting channel and the OK channel and the NG channel, and the collecting channel can be communicated with the OK channel or the NG channel under the driving of the sorting motor.

10. The pin hardness testing apparatus according to claim 8, wherein said sorting bar is wedge-shaped, and has a head end fixed to an output shaft of said sorting motor and a tip end obliquely and upwardly overlapping one of said side walls of said collecting channel.