阅读说明：本技术 水泵外壳的超声波熔接强度质量拉拔力自动检测设备 (automatic detection equipment for ultrasonic welding strength and quality drawing force of water pump shell ) 是由 杨利君 丁坚 周湘平 于 2019-10-18 设计创作，主要内容包括：本发明涉及水泵外壳的超声波熔接强度质量拉拔力自动检测设备,包括设备架、产品工装、步进电机、丝杠副；设备架从左至右依次设有后板、立板一、立板二,步进电机固定于立板一,控制丝杠转动,丝杠两端分别置于两立板上；产品工装包括两个拉力工装定位块、放置水泵盖的泵盖座、放置水泵体的泵体座、固定于后板与立板一间的导轨、滑动配合于导轨的滑块、固定于丝母的测力传感器、过载保护装置,泵体座固定于滑块；泵盖座设于两个拉力工装定位块间,过载保护装置一端与泵体座连接,另一端与测力传感器测力输入端连接,立板二设有接近开关。本发明节省人工成本,提高拉拔力测试精度,自动完成产品熔接质量强度判定,便于过程控制。(The invention relates to automatic detection equipment for ultrasonic welding strength, quality and drawing force of a water pump shell, which comprises an equipment frame, a product tool, a stepping motor and a lead screw pair, wherein the equipment frame is provided with a plurality of welding holes; the equipment frame is sequentially provided with a back plate, a first vertical plate and a second vertical plate from left to right, the stepping motor is fixed on the first vertical plate and controls the screw rod to rotate, and two ends of the screw rod are respectively arranged on the two vertical plates; the product tool comprises two tension tool positioning blocks, a pump cover seat for placing a water pump cover, a pump body seat for placing a water pump body, a guide rail fixed between the rear plate and the vertical plate, a sliding block in sliding fit with the guide rail, a force measuring sensor fixed on a nut and an overload protection device, wherein the pump body seat is fixed on the sliding block; the pump cover seat is arranged between the two tension tool positioning blocks, one end of the overload protection device is connected with the pump body seat, the other end of the overload protection device is connected with the force measurement input end of the force measurement sensor, and the vertical plate II is provided with a proximity switch. The invention saves labor cost, improves the testing precision of the drawing force, automatically finishes the judgment of the welding quality and the strength of the product and is convenient for process control.)

1. The automatic detection equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell comprises a water pump cover (11) and a water pump body (13) welded with the water pump cover (11) through ultrasonic waves, wherein pump cover convex ribs (11-1) and pump body convex ribs (13-1) are respectively arranged on the circumferential surfaces of the water pump cover (11) and the water pump body (13), and is characterized by comprising an equipment frame (15), a product tool, a stepping motor (24) and a lead screw pair;

A rear plate (20), a first vertical plate (2) and a second vertical plate (4) are sequentially and vertically arranged on the equipment frame (15) from left to right, the stepping motor (24) is fixed on the first vertical plate (2), two ends of a lead screw (32) of the lead screw pair are respectively and rotatably connected to the first vertical plate (2) and the second vertical plate (4), and an output shaft of the stepping motor (24) is fixedly connected with the left end of the lead screw (32);

The product tooling comprises two tension tooling positioning blocks (9) which are fixed on a rear plate (20) in parallel, a pump cover seat (12) for placing a water pump cover (11), a pump body seat (14) which is used for placing a water pump body (13) and is adjacent to the pump cover seat (12), a guide rail (37), a sliding block (38), a force measuring sensor (22) and an overload protection device, wherein one end of the guide rail (37) is fixed on the rear plate (20), the other end of the guide rail (37) is fixed on a first vertical plate (2), the sliding block (38) is arranged on the guide rail (37) in a sliding manner, and the pump body seat (14) is fixed on;

the pump cover seat (12) is fixed between the two tension tool positioning blocks (9), a groove I (12-1) is arranged in the pump cover seat (12) along the circumferential direction, a second groove (14-1) is arranged in the pump body seat (14) along the circumferential direction, a pump cover convex rib (11-1) of the water pump cover (11) is positioned in the first groove (12-1), a pump body convex rib (13-1) of the water pump body (13) is positioned in the second groove (14-1), and the left side surface of the pump body convex rib (13-1) is contacted with the left side groove wall of the second groove (14-1), the pump body seat (14) is fixedly connected with one end of the overload protection device, the other end of the overload protection device is connected with the force measurement input end of the force measurement sensor (22), the force measurement sensor (22) is fixed on a screw nut (8) of the screw rod pair through a supporting device, a proximity switch (26) which can be triggered by the contact of the supporting device is arranged on the second vertical plate (4).

2. The automatic detection equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell according to claim 1, wherein the overload protection device comprises a protection sleeve (16), a left connecting piston (17), a pull spring (18) and a right connecting piston (21), the pull spring (18), the left connecting piston (17) and the right connecting piston (21) are all located in the protection sleeve (16), the pull spring (18) is located between the left connecting piston (17) and the right connecting piston (21), two ends of the pull spring (18) are respectively inserted and fixed to the left connecting piston (17) and the right connecting piston (21), the left connecting piston (17) and the right connecting piston (21) are respectively in sliding fit with the inner wall of the protection sleeve (16), two groups of through grooves are formed in the outer surface of the protection sleeve (16), each group of through grooves comprises two kidney-shaped through grooves (16-1), two waist-shaped through grooves (16-1) of one group of through grooves are respectively positioned above and below the left connecting piston (17), two waist-shaped through grooves (16-1) of the other group of through grooves are respectively positioned above and below the right connecting piston (21), the length direction of each waist-shaped through groove (16-1) is axially arranged along the protective sleeve (16), limiting screws (29) are respectively arranged along the radial directions of the left connecting piston (17) and the right connecting piston (21), each limiting screw (29) simultaneously penetrates through the two waist-shaped through grooves (16-1) above and below the connecting piston at the corresponding position, and each limiting screw (29) can axially move along the protective sleeve (16) along with the connecting piston at the corresponding position;

The pump body seat (14) is in threaded connection with the left connecting piston (17), and the right connecting piston (21) is connected with the force measuring input end of the force measuring sensor (22) through the floating joint (30).

3. The automatic detection equipment for the ultrasonic welding strength and the mass drawing force of the water pump shell according to claim 1 or 2 is characterized in that the supporting device comprises a nut seat (3) and a force measurement sensor seat (6), a nut (8) of a screw pair is fixed to the nut seat (3), a clamping groove (6-1) is formed in the lower end of the force measurement sensor seat (6), the upper end of the nut seat (3) is matched in the clamping groove (6-1), the force measurement sensor seat (6) is fixed to the upper end of the nut seat (3), a force measurement sensor (22) is fixed to the force measurement sensor seat (6), and the force measurement sensor seat can contact with a trigger proximity switch (26).

4. the automatic detection equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell according to claim 3 is characterized in that two guide posts (1) parallel to a lead screw (32) of a lead screw pair are arranged between the first vertical plate (2) and the second vertical plate (4), the lead screw (32) is positioned between the two guide posts (1), the two guide posts (1) respectively penetrate through the nut base (3), and the nut base (3) can linearly move along the two guide posts (1).

5. the automatic detection equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell according to claim 3, characterized by further comprising an electrical device, wherein the electrical device comprises an electrical box (27) fixed on the equipment frame (15), a PLC (39) and a stepping motor driver (45), and the PLC and the stepping motor driver are arranged in the electrical box (27);

A 24V power supply and a 5V power supply are arranged in the electric box (27), and a red light (40) and a green light (41) are arranged on the electric box (27);

the PLC (39) is provided with a working power supply terminal, at least one input end and at least one output end;

The stepping motor driver (45) is provided with a power supply end, a pulse signal input end, a direction selection end and 4 driving ends;

the working power supply terminal of the PLC (39) is electrically connected with a 24V power supply, 4 output terminals of the PLC (39) are respectively and electrically connected with the pulse signal input terminal of the stepping motor driver (45), the direction selection terminal of the stepping motor driver (45), one end of the red light (40) and one end of the green light (41), and the other end of the red light (40) and the other end of the green light (41) are respectively and electrically connected with the 24V power supply;

The power end of the stepping motor driver (45) is electrically connected with a 24V power supply;

4 driving ends of the stepping motor driver (45) are respectively and correspondingly electrically connected with 4 control end pins of the stepping motor (24);

The signal output end of the force measuring sensor (22) is electrically connected with one input end of the PLC (39), the power supply end of the force measuring sensor (22) is electrically connected with a 24V power supply, the signal output end of the proximity switch (26) is electrically connected with one input end of the PLC (39), and the power supply end of the proximity switch (26) is electrically connected with the 24V power supply.

6. The automatic detecting equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell according to claim 5, characterized in that the PLC controller (39) is a controller of a model Fx3s-20MT-CM, the model of a stepping motor driver (45) is MD2545, and the model of a stepping motor (24) is a 57HS28-3 two-phase built-in driving stepping motor.

7. The automatic detection equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell according to claim 1 or 2 is characterized in that the stepping motor (24) is fixed on the first vertical plate (2) through a fixing frame, the fixing frame comprises a stepping motor mounting plate (10) and two supports (5) vertically fixed at the left end of the first vertical plate (2), the stepping motor mounting plate (10) is vertically fixed at the left end parts of the two supports (5), the stepping motor (24) is fixed on the stepping motor mounting plate (10), and the other end of the guide rail (37) is fixed on the stepping motor mounting plate (10).

8. The apparatus for automatically detecting the ultrasonic welding strength and the quality drawing force of the water pump casing according to claim 2, wherein the overload protection device is positioned above the stepping motor (24), and the protection sleeve (16) is parallel to the lead screw (32).

9. the automatic detection equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell according to claim 5 is characterized in that a start-up key (42) is arranged on the electric box (27), and the start-up key (42) is electrically connected with one input end of the PLC (39).

10. The automatic detection equipment for the ultrasonic welding strength and the quality drawing force of the water pump shell according to claim 9, characterized in that the electric box (27) is further provided with a reset button (43) and an emergency stop button (44), the reset button (43) is electrically connected with one input end of the PLC (39), and the emergency stop button (44) is electrically connected with one input end of the PLC (39).

Technical Field

the invention relates to automatic detection equipment for the ultrasonic welding strength and quality drawing force of a water pump shell, which is suitable for detecting the drawing force of the water pump shell to be more than or equal to 300N.

background

At present, in the practical use process of some water pump products, the phenomenon that the pump cover is easy to fall off occurs in the water pump, that is, the pump cover and the pump body are separated at the welding surface 46 (as shown in fig. 11), for example, 1046745 water pump, and the production process of detecting the drawing force after the welding of the pump cover and the pump body of the water pump is added on the production line is urgently needed.

at present, the existing automatic tensile test equipment is known to be suitable for carrying out mechanical property tests such as static load, stretching, compression, bending, shearing, peeling and the like on various materials, has complex operation, slow beat and high cost, and is not suitable for judging the qualified quality of the welding strength of a water pump production line.

The manual drawing force measuring detection equipment is high in labor cost and time-consuming, and cannot meet the requirement of production line rhythm because the structure precision is visual, the power is hand-operated, and the detection speed is slow.

Disclosure of Invention

In order to solve the problems, the invention provides the automatic detection equipment for the ultrasonic welding strength and quality drawing force of the water pump shell, which is suitable for controlling the drawing force to be more than or equal to 300N, saves the labor cost, improves the drawing force test precision, has high accuracy, can automatically judge the welding quality strength of the product, and is convenient for process control.

in order to achieve the purpose, the technical scheme adopted by the invention is as follows:

The automatic detection equipment for the ultrasonic welding strength and quality drawing force of the water pump shell comprises an equipment frame, a product tool, a stepping motor and a lead screw pair;

a back plate, a first vertical plate and a second vertical plate are sequentially and vertically arranged on the equipment frame from left to right, the stepping motor is fixed on the first vertical plate, two ends of a lead screw of the lead screw pair are respectively and rotatably connected to the first vertical plate and the second vertical plate, and an output shaft of the stepping motor is fixedly connected with the left end of the lead screw;

the product tool comprises two tension tool positioning blocks fixed on a back plate in parallel, a pump cover seat used for placing a water pump cover, a pump body seat used for placing a water pump body and adjacent to the pump cover seat, a guide rail, a sliding block, a force measuring sensor and an overload protection device, wherein one end of the guide rail is fixed on the back plate, the other end of the guide rail is fixed on a first vertical plate, the sliding block is arranged on the guide rail in a sliding manner, and the pump body seat is fixed on the sliding block;

The pump cover seat is fixed between the two tension tool positioning blocks, a first groove is formed in the pump cover seat along the circumferential direction, a second groove is formed in the pump body seat along the circumferential direction, a pump cover bead of the water pump cover is located in the first groove, a pump body bead of the water pump body is located in the second groove, the left side face of the pump body bead is in contact with the left side groove wall of the second groove, the pump body seat is fixedly connected with one end of an overload protection device, the other end of the overload protection device is connected with a force measurement input end of a force measurement sensor, the force measurement sensor is fixed on a screw of a screw pair through a supporting device, and a proximity switch which can be triggered by the contact of the supporting.

The overload protection device comprises a protective sleeve, a left connecting piston, a pull spring and a right connecting piston, wherein the pull spring, the left connecting piston and the right connecting piston are all positioned in the protective sleeve, the pull spring is positioned between the left connecting piston and the right connecting piston, two ends of the pull spring are respectively inserted and fixed on the left connecting piston and the right connecting piston, the left connecting piston and the right connecting piston are respectively matched with the inner wall of the protective sleeve in a sliding manner, two groups of through grooves are arranged on the outer surface of the protective sleeve, each group of through grooves comprises two waist-shaped through grooves, the two waist-shaped through grooves of one group of through grooves are respectively positioned above and below the left connecting piston, the two waist-shaped through grooves of the other group of through grooves are respectively positioned above and below the right connecting piston, the length direction of the waist-shaped through grooves is axially arranged along the protective sleeve, limit screws are respectively arranged along the radial directions of the left connecting piston and the right connecting piston, and each limit screw simultaneously passes through the two, each limit screw can move along the axial direction of the protective sleeve along with the connecting piston at the corresponding position;

The pump body seat is in threaded connection with the left connecting piston, and the right connecting piston is connected with the force measuring input end of the force measuring sensor through the floating joint.

The support device comprises a screw seat and a force measurement sensor seat, a screw of the screw pair is fixed on the screw seat, a clamping groove is formed in the lower end of the force measurement sensor seat, the upper end of the screw seat is matched in the clamping groove, the force measurement sensor seat is fixed at the upper end of the screw seat, the force measurement sensor is fixed on the force measurement sensor seat, and the force measurement sensor seat can contact with the trigger proximity switch.

Two guide columns parallel to the lead screw of the lead screw pair are arranged between the first vertical plate and the second vertical plate, the lead screw is positioned between the two guide columns, the two guide columns respectively penetrate through the nut base, and the nut base can linearly move along the two guide columns.

the electric device comprises an electric box fixed on the equipment frame, a PLC (programmable logic controller) arranged in the electric box and a stepping motor driver;

A 24V power supply and a 5V power supply are arranged in the electric box, and a red light and a green light are arranged on the electric box;

The PLC controller is provided with a working power supply terminal, at least one input end and at least one output end;

the stepping motor driver is provided with a power supply end, a pulse signal input end, a direction selection end and 4 driving ends;

the working power supply terminal of the PLC controller is electrically connected with a 24V power supply, 4 output ends of the PLC controller are respectively electrically connected with the pulse signal input end of the stepping motor driver, the direction selection end of the stepping motor driver, one end of the red light and one end of the green light, and the other end of the red light and the other end of the green light are respectively electrically connected with the 24V power supply;

The power supply end of the stepping motor driver is electrically connected with a 24V power supply;

4 driving ends of the stepping motor driver are respectively and correspondingly electrically connected with 4 control end pins of the stepping motor;

The signal output end of the force measuring sensor is electrically connected with one input end of the PLC controller, the power supply end of the force measuring sensor is electrically connected with the 24V power supply, the signal output end of the proximity switch is electrically connected with one input end of the PLC controller, and the power supply end of the proximity switch is electrically connected with the 24V power supply.

The PLC controller is an Fx3s-20MT-CM type controller, the type of a stepping motor driver is MD2545, and the type of a stepping motor is 57HS28-3 two-phase built-in driving stepping motor.

the stepping motor is fixed on the first vertical plate through the fixing frame, the fixing frame comprises a stepping motor mounting plate and two supports which are vertically fixed at the left end of the first vertical plate, the stepping motor mounting plate is vertically fixed at the left end parts of the two supports, the stepping motor is fixed on the stepping motor mounting plate, and the other end of the guide rail is fixed on the stepping motor mounting plate.

The overload protection device is positioned above the stepping motor, and the protection sleeve is parallel to the screw rod.

the electronic box is provided with a start-up key, and the start-up key is electrically connected with one input end of the PLC.

Still be equipped with reset button, scram button on the electronic box, reset button is connected with an input electricity of PLC controller, and the scram button is connected with an input electricity of PLC controller.

the stepping motor provides power, so that the beat is improved, and the labor is saved;

the motor torque can be converted into stable linear tension by selecting a screw rod nut;

the screw base moves on the guide post through the linear bearing, so that the screw rod is prevented from being damaged by bending force generated on the screw rod;

The force measuring sensor is connected with the right connecting piston of the pull spring through a floating joint, so that accumulated errors caused by tool manufacturing and assembling are eliminated.

in the invention, each limit screw can move along the axial direction of the protective sleeve along with the connecting piston at the corresponding position, and because the limit screw is positioned in the kidney-shaped through groove, the moving range is only within the length of the kidney-shaped through groove.

The protective sleeve in the overload protection device is internally provided with a pull spring with the maximum effective pull force of 450N, when the pull force is 0-380N, the production line requires 300N, the energy storage characteristic of the spring is utilized to realize stable, continuous and balanced connection (soft connection) of the force transducer and the product tool pump body seat end, when the pull force is more than 380N, the spring is protected, the instant bearing pull force of the protective sleeve, the force transducer and the product tool pump body seat end is rapidly improved (hard connection), the water pump shell is broken, the water pump cover is separated from the water pump body, and the overall performance protection of the equipment is realized.

the protection sleeve is arranged to enable the pull spring to extend in the protection sleeve, so that the tension loss of the pull spring is reduced, and the automatic detection equipment is prevented from being damaged by the reciprocating shaking force generated by the water pump body under the elastic force of the pull spring along with the pump body seat after the water pump cover and the water pump body of the water pump shell are pulled off. Therefore, even if the water pump cover and the water pump body are broken, the amplitude of the reciprocating motion of the pump body seat under the elastic force action of the pull spring in the protective sleeve is gradually reduced from large to small until the water pump cover and the water pump body are stopped, the pull spring stretches and retracts back and forth in the protective sleeve until the elastic force is slowly released, and the damage to the pull spring is also reduced.

the invention has the beneficial effects that: the labor cost is saved, the drawing force testing precision is improved, the accuracy is high, the welding quality strength of the product can be automatically judged, the process control is convenient, and the nondestructive testing is realized. The device has the advantages of simple structure, reasonable design, convenience and quickness in operation, and capability of clearly displaying the quantitative parameters, and provides a standard parameter basis for the process standardization theory.

drawings

FIG. 1 shows a schematic perspective view of the present invention;

FIG. 2 is a schematic front view of the present invention with the front guide post removed;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic diagram of the present invention showing a reset distance configuration;

FIG. 5 is a schematic view of a part of the enlarged structure of A in FIG. 1;

FIG. 6 is a schematic diagram of the circuit connection of the present invention;

FIG. 7 is a schematic diagram of the PLC controller connected to a power supply;

FIG. 8 is a schematic perspective view of the present invention with a water pump installed;

FIG. 9 is a schematic top view of the present invention with the water pump product installed;

FIG. 10 is a partial enlarged structural view of B in FIG. 9;

Fig. 11 shows a schematic of the construction of a water pump product.

Reference numerals: guide post 1, vertical plate I2, nut seat 3, vertical plate II 4, support 5, force measuring sensor seat 6, clamping groove 6-1, trigger surface 6-2, linear bearing 7, nut 8, tension tool positioning block 9, stepping motor mounting plate 10, water pump cover 11, pump cover rib 11-1, pump cover seat 12, groove I12-1, water pump body 13, pump body rib 13-1, pump body seat 14, groove II 14-1, equipment frame 15, protective sleeve 16, waist-shaped through groove 16-1, left connecting piston 17, pull spring 18, back plate 20, right connecting piston 21, force measuring sensor 22, stepping motor 24, proximity switch seat 25, proximity switch 26, electric box 27, coupling 28, limit screw 29, floating joint 30, lead screw 32, guide rail 37, slide block 38, PLC controller 39, red light 40, green light 41, start key 42, force measuring sensor seat 13, and control method, A reset button 43, an emergency stop button 44, a stepping motor driver 45 and a welding surface 46.

Detailed Description

for a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

Referring to the attached drawings 1-10, the invention provides an automatic detection device for ultrasonic welding strength and quality drawing force of a water pump shell, the water pump shell comprises a water pump cover 11 and a water pump body 13 welded with the water pump cover 11 through ultrasonic waves, a welding surface 46 between the water pump cover 11 and the water pump body 13 is shown in fig. 11, pump cover convex ribs 11-1 and pump body convex ribs 13-1 are respectively arranged on the circumferential surfaces of the water pump cover 11 and the water pump body 13, and the automatic detection device for ultrasonic welding strength and quality drawing force of the water pump shell comprises a device frame 15, a product tool, a stepping motor 24 and a screw pair.

The rear plate 20, the first vertical plate 2 and the second vertical plate 4 are sequentially and vertically arranged on the equipment frame 15 from left to right, the stepping motor 24 is fixed on the first vertical plate 2, two ends of a lead screw 32 of the lead screw pair are rotatably connected to the first vertical plate 2 and the second vertical plate 4 through deep groove ball bearings respectively, and an output shaft of the stepping motor 24 is fixedly connected with the left end of the lead screw 32 through a coupler 28.

The product frock includes two pulling force frock locating blocks 9 that are fixed in backplate 20 side by side through the screw, a pump cover seat 12 for placing water pump cover 11, a pump body seat 14 for placing water pump body 13 and adjacent with pump cover seat 12, guide rail 37, slider 38, force cell sensor 22, overload protection device, form the space that supplies to place the water pump between pump cover seat 12 and the pump body seat 14, pump cover seat 12 is uncovered with pump body seat 14 upper end, water pump cover 11 of water pump shell is located pump cover seat 12, water pump body 13 is located pump body seat 14, guide rail 37 one end is fixed in backplate 20 through the screw, the other end is fixed in riser one 2 through the screw, slider 38 slides and sets up on guide rail 37, pump body seat 14 passes through the fix with screw on slider 38.

the pump cover seat 12 is fixed between two tension tool positioning blocks 9 through screws, a groove I12-1 is arranged in the pump cover seat 12 along the circumferential direction, a groove II 14-1 is arranged in the pump body seat 14 along the circumferential direction, a pump cover convex rib 11-1 of the water pump cover 11 is positioned in the groove I12-1, a pump body convex rib 13-1 of the water pump body 13 is positioned in the groove II 14-1, the left side surface of the pump body convex rib 13-1 is contacted with the left side groove wall of the groove II 14-1, the pump body seat 14 is fixedly connected with one end of an overload protection device, the other end of the overload protection device is connected with a force measurement input end of a force measurement sensor 22 through a floating joint 30, the force measurement sensor 22 is fixed on a screw nut 8 of a screw pair through a supporting device, a proximity switch 26 which can be triggered by the contact of the supporting device is arranged on a vertical plate II 4, the proximity switch 26 is screwed to the proximity switch holder 25.

the overload protection device comprises a protection sleeve 16, a left connecting piston 17, a pull spring 18 and a right connecting piston 21, wherein the pull spring 18, the left connecting piston 17 and the right connecting piston 21 are all positioned in the protection sleeve 16, the pull spring 18 is positioned between the left connecting piston 17 and the right connecting piston 21, two ends of the pull spring 18 are respectively inserted and fixed on the left connecting piston 17 and the right connecting piston 21, the left connecting piston 17 and the right connecting piston 21 are respectively matched with the inner wall of the protection sleeve 16 in a sliding manner, two groups of through grooves are arranged on the outer surface of the protection sleeve 16, each group of through grooves comprises two waist-shaped through grooves 16-1, the length direction of the waist-shaped through grooves 16-1 is axially arranged along the protection sleeve 16, the two waist-shaped through grooves 16-1 of one group of through grooves are respectively positioned above and below the left connecting piston 17, the two waist-shaped through grooves 16-1 of the other group of through grooves are respectively positioned above and below, and limiting screws 29 are respectively arranged along the radial directions of the left connecting piston 17 and the right connecting piston 21, each limiting screw 29 simultaneously passes through two waist-shaped through grooves 16-1 at the upper part and the lower part of the connecting piston at the corresponding position, and each limiting screw 29 can axially move along the protective sleeve 16 along with the connecting piston at the corresponding position.

The pump body seat 14 is in threaded connection with the left connecting piston 17, the right connecting piston 21 is in threaded connection with one end of the floating joint 30, and the other end of the floating joint 30 is in threaded connection with the force measurement input end of the force measurement sensor 22. Here, the protective sleeve 16 is arranged such that the tension spring 18 extends within the protective sleeve 16, reducing the loss of tension in the tension spring 18 and preventing damage to the tension spring beyond the elastic deformation of the spring. And after the water pump cover 11 and the water pump body 13 of the water pump shell are broken at the welding surface 46, the water pump body 13 slides back and forth on the guide rail 37 along with the pump body seat 14 and the slide block 38, the protective sleeve 16 is arranged, and the pump body seat 14 is fixed on the slide block 38, so that the automatic detection equipment can be prevented from being damaged by the back and forth movement shaking force generated by the pump body seat 14 under the elastic force of the pull spring 18 after the water pump cover 11 and the water pump body 13 of the water pump shell are broken, therefore, even if the water pump cover 11 and the water pump body 13 are broken, the amplitude of the back and forth movement of the pump body seat 14 under the elastic force of the pull spring 18 in the protective sleeve 16 is gradually reduced from large to small until the stop, the pull spring 18 stretches back and forth in the protective sleeve 16 until the elastic force is slowly released, and the damage to the.

the supporting device comprises a screw base 3 and a force measuring sensor base 6, a screw 8 of a screw pair is fixed on the screw base 3 through a screw, a clamping groove 6-1 is formed in the lower end of the force measuring sensor base 6, the upper end of the screw base 3 is matched in the clamping groove 6-1, the force measuring sensor base 6 is fixed at the upper end of the screw base 3 through a screw, a force measuring sensor 22 is fixed on the force measuring sensor base 6 through a screw, and the force measuring sensor base 6 can contact with a trigger proximity switch 26.

Two guide columns 1 parallel to a screw 32 of the screw pair are arranged between the first vertical plate 2 and the second vertical plate 4, the screw 32 is located between the two guide columns 1, the two guide columns 1 respectively penetrate through the nut base 3, a linear bearing 7 is arranged between the guide columns 1 and the nut base 3, the nut base 3 can linearly move along the two guide columns 1, and two ends of the guide columns 1 are respectively inserted and fixed on the first vertical plate 2 and the second vertical plate 4.

the device also comprises an electric device, wherein the electric device comprises an electric box 27 fixed on the equipment frame 15, a PLC 39 arranged in the electric box 27 and a stepping motor driver 45; a 24V power supply and a 5V power supply are arranged in the electric box 27, and a red light 40 and a green light 41 are arranged on the electric box 27;

the PLC controller 39 is provided with a working power supply terminal SS, 5 input ends and 4 output ends;

The stepping motor driver 45 is provided with a power supply terminal VCC, a pulse signal input terminal PuL-, a direction selection terminal DiR-and 4 driving terminals;

a working power supply terminal SS of the PLC 39 is electrically connected with a 24V power supply, 4 output terminals Y0, Y1, Y4 and Y5 of the PLC 39 are respectively and electrically connected with a pulse signal input terminal PuL of the stepping motor driver 45, a direction selection terminal DiR of the stepping motor driver 45, one end of the red light 40 and one end of the green light 41, and the other end of the red light 40 and the other end of the green light 41 are respectively and electrically connected with the 24V power supply;

A power supply end VCC of the stepping motor driver 45 is electrically connected with a 24V power supply, and an PuL + end and a DiR + end of the stepping motor driver 45 are electrically connected with a 5V power supply;

4 driving ends A +, A-, B + and B-of the stepping motor driver 45 are respectively and correspondingly electrically connected with 4 control end pins of the stepping motor 24;

the signal output terminal of the load cell 22 (corresponding to the SP symbol in the schematic diagram) is electrically connected to one input terminal X3 of the PLC controller 39, the power supply terminal of the load cell 22 is electrically connected to a 24V power supply, the signal output terminal of the proximity switch 26 (corresponding to the Fe symbol in the schematic diagram) is electrically connected to one input terminal X4 of the PLC controller 39, and the power supply terminal of the proximity switch 26 is electrically connected to the 24V power supply.

the PLC 39 is a controller of model Fx3s-20MT-CM, the model of the stepper motor driver 45 is MD2545, and the model of the stepper motor 24 is a 57HS28-3 two-phase built-in driving stepper motor.

step motor 24 is fixed in riser 2 through the mount on, the mount includes step motor mounting panel 10, two vertical fixation in the support 5 of 2 left ends of riser, step motor mounting panel 10 is through two 5 left side tip of screw vertical fixation in, step motor 24 is through fix with screw in step motor mounting panel 10, the other end of guide rail 37 is through fix with screw in step motor mounting panel 10.

The overload protection device is located above the stepper motor 24 and the protection sleeve 16 is parallel to the lead screw 32.

the electric box 27 is provided with a start-up key 42, a reset button 43, and an emergency stop button 44 (corresponding to symbols AQ1, AQ, JAT in the schematic circuit diagram, respectively), the start-up key 42 being electrically connected to one input terminal X1 of the PLC controller 39, the reset button 43 being electrically connected to one input terminal X2 of the PLC controller 39, and the emergency stop button 44 being electrically connected to one input terminal X0 of the PLC controller 39.

the PLC 39 is also provided with 3 common terminal terminals COM0, COM1 and COM4, wherein COM0 and COM1 are connected with the negative electrode of a 5V power supply, and COM4 is connected with the negative electrode of a 24V power supply; the PLC controller is further provided with three power terminals L, N, PE, the three power terminals are respectively connected with L, N, PE ends of a total AC power supply of the electric box 27, fuses of 250V and 2A are arranged on a line connected with the L end, a linked switch QS is arranged on a line of L, N, the total AC power supply converts alternating current into 24V direct current and 5V direct current through an AC/DC circuit conversion module, and the 24V direct current and the 5V direct current are respectively supplied for an I/O port power supply and a hardware system power supply of the PLC controller 39.

in this embodiment, the maximum effective tension of the pull spring 18 in the protective sleeve 16 is 450N, the requirement of a production line is 300N, when the tension is 0 to 380N, the force sensor 22 is in soft connection with the pump body base 14 through the pull spring 18 by using the energy storage characteristic of the spring, the water pump housing is pulled, when the tension is greater than 380N, the pull spring 18 is protected, and the protective sleeve 16 and the force sensor 22 are in hard connection with the pump body base 14 through the pull spring 18. When the device runs, the stepping motor 24 rotates forward and reversely, the screw seat 3 is controlled to move rightwards or leftwards through the screw pair, the parts which are hard connected with the screw seat 3 comprise the force measuring sensor seat 6, the force measuring sensor 22, the floating joint 30 and the right connecting piston 21 to move synchronously, and at the moment, the pull spring 18 stores energy or releases energy.

After the electric box 27 is connected with a power supply, it is confirmed that no water pump product is placed in the product tool, and the start key 42 is pressed down, the device automatically resets, and the device is in the original position of the embodiment, namely, the left offset L =70mm of the proximity switch 26, namely, the reset distance (the position is the distance between the trigger surface 6-2 of the force sensor seat 6, which triggers the proximity switch 26 and is measured when the water pump product is not placed on the device, namely, no tension exists, and the tension of the tension spring 18 is 0, and the proximity switch 26). After the machine is started, the PLC 39 receives a starting signal, a pulse signal is sent to the stepping motor 24 through a pulse signal input end PuL of the stepping motor driver 45, the stepping motor 24 runs, the screw base 3 is controlled to move rightwards through the screw pair, the components of the force measuring sensor base 6 and the like move towards the direction of the proximity switch 26, when the right side surface (namely a trigger surface 6-2) of the force measuring sensor base 6 contacts the proximity switch 26, the proximity switch 26 sends a signal to the PLC 39, the PLC 39 further controls the stepping motor 24 to rotate reversely, when the components of the force measuring sensor base 6 and the like move 70mm towards the reverse direction, the PLC 39 sends a stop signal to the stepping motor 24 through a direction selection end DiR of the stepping motor driver 45, the stepping motor 24 stops running, and the components of the force measuring sensor base 6 and the like are stopped. When the product tooling has no product, the distance of 70mm left of the proximity switch 26 is converted into the revolution number of the stepping motor 24, if the distance of 70mm left of the proximity switch 26 corresponds to 300 revolutions of the reversing revolution number of the stepping motor 24, the distance is set in the program of the PLC 39, when the counter in the PLC 39 calculates that the reversing revolution number of the stepping motor 24 is 300 revolutions, the PLC 39 determines that the components such as the force sensor seat 6 move 70mm in the reverse direction, and the PLC 39 gives a stop signal to the stepping motor 24.

after the resetting is completed, a water pump product is placed into the product tooling, a water pump cover 11 of a water pump shell is positioned in a pump cover seat 12, a water pump body 13 is positioned in a pump body seat 14, a pulling force tooling positioning block 9 is in contactless connection with the pump body seat 14, the pump body seat 14 is in threaded connection with a left connecting piston 17 of an overload protection device, and the left connecting piston 17 is in contactless connection with the pump cover seat 12. The machine key 42 is pressed down for detection, the stepping motor 24 operates, the screw seat 3 is controlled to move rightwards through the screw pair, the force measuring sensor seat 6, the force measuring sensor 22, the floating joint 30 and the right connecting piston 21 move towards the direction of the proximity switch 26, the pull spring 18 is in tension, the pump body seat 14 is pulled rightwards through the left connecting piston 17, the pump body seat 14 applies right tension to the water pump body 13 through the left side groove wall of the groove II 14-1, the water pump body 13 moves rightwards together with the water pump cover 11, when the right side surface of the pump cover convex edge 11-1 of the water pump cover 11 is connected with the right side groove wall of the groove I12-1 of the pump cover seat 12, the right side groove wall of the groove I12-1 applies left resistance to the water pump cover 11, and at the moment, the water pump cover 11 and the water pump. Here, the distance between the right side of the pump cover rib 11-1 and the right side groove wall of the first groove 12-1 is smaller than the resetting distance L. When the force sensor 22 detects that the set tension force is 300N, the water pump shell is not broken, the force sensor 22 sends a signal to the PLC 39, and the green lamp 41 is lightened to indicate that the water pump shell is qualified. The PLC 39 then reverses the signal to the stepper motor 24 and the apparatus returns to its original position, at which point the tension measured by the load cell 22 is zero, and the product is removed and placed in the acceptable area to complete a cycle.

After the start key 42 is pressed down for detection, the equipment is pulled off when the product water pump cover 11 and the water pump body 13 do not reach the set pulling force of 300N or when the product reaches the set pulling force of 300N, the equipment can run all the time, the pulled off water pump body 13 moves towards the direction of the proximity switch 26 along with the parts such as the pump body seat 14, the force sensor seat 6 and the like, when the trigger surface 6-2 of the force sensor seat 6 contacts the proximity switch 26, the proximity switch 26 sends a signal to the PLC controller 39, the red light 40 is lightened at the moment, the PLC controller 39 sends a stop signal to the stepping motor 24, the stepping motor 24 stops running, the equipment stops running immediately, the scrapped product is taken down and put into a defective product box, the reset button 43 is pressed for quick reset, the PLC controller 39 receives the reset signal to control the stepping motor 24 to rotate reversely, the parts such as the force sensor seat 6 move towards the reverse direction by 70mm, the stop running is stopped, one cycle is completed. In addition, if an emergency situation occurs, the emergency stop button 44 can be pressed, the PLC 39 receives an emergency stop signal and then sends a signal to the stepping motor 24 to control the stepping motor 24 to stop running, the PLC 39 sends a return signal to the power-on key 42, the equipment can stop acting immediately at the moment, after the emergency situation is processed, the power-on key 42 is pressed to continue the original action until the force sensor 22 detects that the designed tension force 300N is reached, and the first situation is repeated to complete a cycle. If the product is broken when the design tension 300N is not reached or the product is broken when the set tension 300N is reached, the second condition is repeated to complete a cycle.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.