CN213167084U - Error proofing device - Google Patents

Abstract

The utility model discloses a mistake proofing device for whether the position that detects the part configuration in plastic mould is the standard position, the mistake proofing device includes: one end of the core rod extends along the axial direction to form a profiling part, and the outer surface of the profiling part is in special-shaped fit with the inner surface of the cavity of the part; the sensor is arranged on one side of the mandrel, which is far away from the profiling part; the core rod can move in two directions along the axial direction, and one end of the core rod, which is far away from the profiling part, is separated from or contacted with the sensor.

Description

Error proofing device

Technical Field

The utility model relates to a mistake proofing device of part location, in particular to mistake proofing device of crankshaft pulley location.

Background

The machining process of the conventional shaping process of the part comprises the following processes: feeding by a manipulator; oil immersion; shaping; and (6) demolding. The conventional shaping process is a set of automatic production process, whether the position of the part is correct or not cannot be identified in the processes of mechanical arm feeding and oil immersion, and once the part with the wrong placing direction flows to the shaping position for processing, the mould is damaged.

Therefore, in order to solve the risk of the damage of the mold due to the wrong placement of the parts, it is necessary to provide a new error-proofing device.

Disclosure of Invention

An object of the utility model is to provide a mistake proofing device, including plug, profile modeling portion, sensor, profile modeling portion sets up in the one end that the plug is close to the part, and the sensor sets up in the one end that the plug deviates from the part, and the surface of profile modeling portion and the die cavity internal surface special-shaped cooperation of part solve the part and place the risk that the mistake leads to the mould to damage.

In order to achieve the above object, according to the present invention, an aspect of the present invention provides a mistake proofing device for detecting whether a position where a part is disposed in a shaping mold is a standard position, the mistake proofing device comprising: one end of the core rod extends along the axial direction of the core rod to form a profiling part, and the outer surface of the profiling part is used for being in special-shaped fit with the inner surface of the cavity of the part; the sensor is arranged on one side of the mandrel, which is far away from the profiling part; wherein the core rod can move in two directions along the axial direction, and one end of the core rod, which is far away from the profiling part, is separated from or contacted with the sensor.

In some embodiments, the profiling portion includes a first mating portion and a second mating portion formed by extending the first mating portion in the axial direction toward a side facing away from the core rod, and the second mating portion is integrally connected to the first mating portion.

In some embodiments, the second engaging portion is configured to engage with the positioning cavity of the cavity after passing through the press-fit cavity of the cavity, and the first engaging portion of the profiling portion is configured to engage with the press-fit cavity of the part, so that an end of the mandrel away from the profiling portion is separated from the sensor when the part is disposed in the shaping mold in the standard position.

In some embodiments, the second matching portion of the profiling portion is configured to match with a press cavity of the cavity, so that in a state that the part is arranged in the shaping mold and is deviated from the standard position, one end of the core rod, which is deviated from the profiling portion, contacts with the sensor to trigger the sensor to work.

In some embodiments, the error-proofing device further comprises a die sleeve, the outer wall of the mandrel is slidably fitted to the inner wall of the die sleeve, and one end of the die sleeve, which is close to the part, is a limiting end, and the limiting end is used for contacting a pressing cavity of a cavity for pressing the part.

In some embodiments, the mold sleeve comprises a first cavity, a second cavity and a third cavity, wherein the second cavity and the first cavity form a first boss, and the second cavity and the third cavity form a second boss.

In some embodiments, an outer peripheral surface of the first mating portion of the profiling portion is configured to slidably mate with an inner peripheral surface of the first cavity, and the first mating portion is configured to snap-fit with the first boss; the outer peripheral surface of the core rod is used for being in sliding fit with the inner peripheral surface of the second cavity; one end of the core rod, which is deviated from the profiling part, extends axially to form a limiting part, the peripheral surface of the limiting part is used for being in clearance fit with the third cavity, and the limiting part is used for being connected with the second boss in a clamping and matching manner.

In some embodiments, the error-proofing device further comprises an elastic member, the elastic member is movably connected with the limiting portion, and the elastic member is also movably connected in the third cavity of the die sleeve.

In some embodiments, the error-proofing device further comprises a clamping mechanism, the clamping mechanism is fixedly connected with the sensor, and the clamping mechanism is fixedly connected with the die sleeve.

In some embodiments, the error-proofing device further comprises an alarm, the alarm is in electrical signal connection with the sensor, and the alarm is used for triggering the sensor to work by the mandrel and then starting the alarm.

In some embodiments, the contoured portion is integrally connected with the mandrel; the first matching part is integrally connected with the second matching part.

In the error-proofing device of the present invention, the error-proofing device is used for detecting whether the position of the part disposed in the shaping mold is a standard position, the error-proofing device includes a core rod, a profiling portion is disposed on one side of the core rod close to the part, a sensor is disposed on one side of the core rod away from the part, and the outer surface of the profiling portion is used for being in irregular fit with the inner surface of the cavity of the part; the mandrel can move in the two directions along the axial direction, and one end of the mandrel, which is far away from the profiling part, is used for being separated from or contacted with the sensor. Specifically, when the position where the part is arranged in the shaping mold is the standard position, the first matching part of the profiling part is used for matching with a pressing cavity of a cavity of the part, the outer peripheral surface of the second matching part of the profiling part is used for matching with a positioning cavity of the cavity after passing through the pressing cavity, and the end of the core rod, which is far away from the part, is separated from the sensor; when the position of the part arranged in the shaping die deviates from the standard position, the second matching part of the profiling part is matched with the press fit cavity, and the end of the core rod, which deviates from the part, is contacted with the sensor to trigger the sensor to work. The sensor is electrically connected with the alarm, the sensor works in linkage with the alarm to alarm and suddenly stop, namely, the sensor stops working and continues to press the part to the shaping die. Therefore, the problem that the shaping die is damaged due to the fact that the part is placed in the shaping die in a wrong position can be solved.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an error proofing device according to an embodiment of the present invention;

FIG. 2a is a schematic view of the assembly of the present invention in which the parts are disposed in the shaping mold at a standard position;

FIG. 2b is a top view of FIG. 2 a;

FIG. 3a is a schematic cross-sectional view of a component of the present invention;

FIG. 3b is a schematic view of a first surface structure of the part shown in FIG. 3 a;

FIG. 3c is a schematic view of a second surface configuration of the part illustrated in FIG. 3 a;

fig. 4a is a schematic cross-sectional view of the shaping mold of the present invention;

FIG. 4b is a top view of the sizing die of FIG. 3 a;

fig. 5a is a schematic view of the working state of the mistake proofing device of the present invention;

FIG. 5b is an enlarged schematic view of the error proofing device of FIG. 5a at the point where the contour portion and the part are assembled;

FIG. 5c is an enlarged schematic view of the mandrel of the error proofing device of FIG. 5a in a separated state from the sensor;

fig. 6a is a schematic view of another working state of the mistake proofing device of the present invention;

FIG. 6b is an enlarged schematic view of the error proofing device of FIG. 6a at the point where the contour portion and the part are assembled;

fig. 6c is an enlarged schematic view of the mandrel of the error proofing device of fig. 6a in a contact state with the sensor.

The reference numbers in the figures are:

200. a part; 201. A cavity;

202. a first step; 203. A positioning cavity;

204. a second step; 205. A press-fit cavity;

210. a toothed surface; 220. A first surface;

230. a second surface; 2030. Calibrating the surface;

300. shaping the die; 301. A first receiving cavity;

303. a second receiving cavity; 302. A step;

323. mounting holes; 324. A second mounting hole;

325. a third mounting hole; 326. A fourth mounting hole;

3030. a second tooth surface; 3010. A reference center plane;

310. a base; 320. An extension portion;

322. flattening and cutting the noodles; 10. A core rod;

20. a profiling portion; 30. A sensor;

21. a first mating portion; 22. A second mating portion;

23. a limiting part; 40. Die sleeve;

41. a first cavity; 42. A second cavity;

43. a third cavity; 412. A first boss;

413. a second boss; 44. A support;

45. a limiting end; 50. An elastic member;

60. a clamping mechanism.

Detailed Description

Hereinafter, the technology of the present application will be described in detail with reference to specific embodiments. It should be understood that the following detailed description is only for assisting those skilled in the art in understanding the present application, and is not intended to limit the present application.

Referring to fig. 1 and fig. 2a, in the present embodiment, a mistake proofing apparatus is provided for detecting whether a position where a part 200 is disposed in a shaping mold 300 is a standard position. In this embodiment, the inner peripheral surface of the shaping mold 300 has a cavity, the part 200 is accommodated in the cavity of the shaping mold 300, and the outer peripheral surface of the part 200 is matched with the inner peripheral surface of the cavity.

Referring to fig. 3a, the component 200 is an axial structural member, the component 200 has a cavity 201, a positioning cavity 203 and a pressing cavity 205 arranged along an axial direction, and the cavity 201, the positioning cavity 203 and the pressing cavity 205 are connected in sequence. The cavity 201 and the positioning cavity 203 are connected to form a first step 202, and the positioning cavity 203 and the pressing cavity 205 are connected to form a second step 204. And, as shown in fig. 3a, the outer peripheral surface of the part 200 along the axial direction is a toothed surface 210, and the toothed surface 210 is matched with the cavity of the shaping mold 300.

Preferably, the cavity 201, the positioning cavity 203 and the pressing cavity 205 are cylindrical holes. Moreover, the diameter of the positioning cavity 203 is larger than that of the cavity 201, and the diameter of the positioning cavity 203 is smaller than that of the stitching cavity 205.

Referring to fig. 3a, fig. 3b and fig. 3c, the component 200 further has a first surface 220 and a second surface 230 disposed opposite to each other. As shown in fig. 2a, the first surface 220 is located at one side of the stitching chamber 205, and the second surface 230 is located at one side of the cavity 201.

Continuing to refer to fig. 3b, a calibration surface 2030 is disposed on a side surface of the positioning cavity 203 of the part 200, the calibration surface 2030 extends along the axial direction, an axial centerline of the part 200 is parallel to the calibration surface 2030, and the calibration surface 2030 is used for calibrating whether a position where the part 200 is disposed in the shaping mold 300 is a standard position.

Referring to fig. 4a, the shaping jig 300 is an axial structural member, the shaping jig 300 includes a first receiving cavity 301 and a second receiving cavity 303 disposed along the axial direction, and the first receiving cavity 301 and the second receiving cavity 303 are sequentially communicated to form a step 302. The first accommodating cavity 301 is a truncated cone-shaped structural member, and the second accommodating cavity 303 is an axial rotating structural member.

Referring to fig. 4b, the inner circumferential surface of the second receiving cavity 303 is provided with a second tooth surface 3030. Said second toothed surface 3030 is intended to cooperate with said toothed surface 210 of said part 200. In this embodiment, as shown in fig. 3b and fig. 4b, the number of the gears of the second tooth surface 3030 and the tooth surface 210 is equal, the gears are uniformly arranged in the circumferential direction, and the number of the gears is 24.

As shown in fig. 4a and 4b, the reforming jig 300 has a base 310 and an extension 320 formed by extending the base 310 in a radial direction thereof. The extension 320 is integrally connected with the base 310. The first receiving cavity 301, the second receiving cavity 303, the step 302 and the second tooth surface 3030 are located on the base 310.

As shown in fig. 4b, the extension 320 is a flange. The extension part 320 includes two symmetrical straight cut surfaces 322, the straight cut surfaces 322 serve as a guide part, the distance from the axial center of the reforming jig 300 to any one of the straight cut surfaces 322 is 66, and the two straight cut surfaces 322 extend to intersect at an angle of 30 °.

As shown in fig. 4b, a plurality of mounting holes 323 are uniformly arranged on the extension part 320 in the circumferential direction, that is, the distance from each mounting hole 323 to the central axis of the shaping mold 300 is equal, the mounting holes 323 are through holes, and the mounting holes 323 are parallel to the axial direction. Preferably, the distance from the axial center of the shaping mold 300 to the center of the mounting hole 323 is equal to the distance from the axial center of the shaping mold 300 to the flat tangential plane 322. Preferably, the distance from the center of the mounting hole 323 to the axial center is 66. Preferably, the number of the mounting holes 323 is four.

As shown in fig. 4b, the shaping mold 300 has a reference center plane 3010, and the shaping mold 300 is symmetrically disposed about the reference center plane 3010. The two flat tangent planes 322 are symmetrically arranged with respect to the reference center plane 3010. The extension 320, i.e., the flange, is further provided with a second mounting hole 324, a third mounting hole 325 and a fourth mounting hole 326, wherein the central axis of the second mounting hole 324 is located on the reference central plane 3010. On any radial section of the flange, the included angle between the central axis of the third mounting hole 325 and the reference central plane 3010 is 30 °, and the included angle between the central axis of the third mounting hole 325 and the central axis of the second mounting hole 324 is 150 °; an included angle between the central axis of the fourth mounting hole 326 and the reference central plane 3010 is 30 °, and an included angle between the central axis of the fourth mounting hole 326 and the central axis of the second mounting hole 324 is 150 °.

And as shown in fig. 4b, the second tooth surface 3030 of the shaping mold 300 is arranged axisymmetrically with respect to the reference center plane 3010.

As shown in fig. 2a and 2b, the part 200 is disposed in the shaping mold 300, and when the position where the part 200 is disposed in the shaping mold 300 is a standard position, the calibration surface 2030 of the part 200 is parallel to the reference center plane 3010 of the shaping mold 300, and an angle between the calibration surface 2030 of the part 200 and any one of the flat tangent planes 322 is 30 °.

In the present embodiment, a mistake proofing device is provided for detecting whether the position where the part 200 is disposed in the shaping mold 300 is a standard position. As shown in fig. 1, the mistake proofing device includes a mandrel 10, a copying portion 20, and a sensor 30. One end of the core rod 10 extends along the axial direction thereof to form a profile portion 20, and the outer surface of the profile portion 20 is used for profile matching with the inner surface of the cavity of the part 200. Specifically, the profiling portion 20 includes a first engaging portion 21 and a second engaging portion 22, the first engaging portion 21 faces the second engaging portion 22 formed by extending in the axial direction away from the side of the mandrel 10, the first engaging portion 21 is configured to engage with the pressing cavity 205 and the second step 204 of the part 200, and an outer peripheral surface of the second engaging portion 22 is configured to engage with the positioning cavity 203 of the part 200 after passing through the pressing cavity 205.

Preferably, the profiling portion 20 is integrally connected with the mandrel 10; preferably, the first fitting portion 21 and the second fitting portion 22 are integrally connected; preferably, the first fitting portion 21 and the second fitting portion 22 are both cylindrical structural members, and an outer diameter of the first fitting portion 21 is larger than an outer diameter of the second fitting portion 22.

As shown in fig. 1, a stopper 23 is further provided along an axial direction of an end of the mandrel bar 10 facing away from the copying portion 20. The limiting part 23 is a cylindrical structural member, and the diameter of the limiting part 23 is larger than that of the core rod 10. Preferably, the limiting portion 23 is integrally connected with the core rod 10.

As shown in fig. 1, the sensor 30 is provided on a side of the mandrel 10 facing away from the copying section 20. The end of the mandrel 10 facing away from the sensor 30 is in contact with or separated from the sensor 30. In this embodiment, the mandrel 10 is movable in both directions in its axial direction to effect separation or contact of the end of the mandrel 10 facing away from the profile 20 from the sensor 30.

Referring to fig. 5a, 5b and 5c, in the present embodiment, specifically, when the position where the part 200 is disposed in the shaping mold 300 is the standard position, the outer surface of the profiling portion 20 fits into the positioning cavity 203 of the part 200, the first step 202 of the part 200 prevents the profiling portion 20 from protruding into the cavity 201 of the part 200, and the end of the mandrel 10 facing away from the part 200 is separated from the sensor 30.

Referring to fig. 6a, 6b and 6c, when the position of the part 200 disposed in the shaping mold 300 deviates from the standard position, the profiling portion 20 is located outside the positioning cavity 203 of the part 200, specifically, the profiling portion 20 is located in the pressing cavity 205 of the part 200, the second step 204 prevents the profiling portion 20 from extending into the positioning cavity 203, and the end of the mandrel 10 facing away from the part 200 contacts the sensor 30 to trigger the sensor 30 to operate.

In the present application, as shown in fig. 1, the error-proofing apparatus further includes a die case 40. The inner wall of the die case 40 is slidably fitted to the outer wall of the mandrel 10 in the axial direction of the mandrel 10. The die sleeve 40 includes a first cavity 41, a second cavity 42 and a third cavity 43 connected in sequence.

As shown in fig. 1, the profile portion 20 is configured to be received in the first cavity 41, specifically, an outer peripheral surface of the profile portion 20 is configured to slidably engage with an inner peripheral surface of the first cavity 41, and more specifically, an outer peripheral surface of the first engaging portion 21 of the profile portion 20 is configured to engage with an inner peripheral surface of the first cavity 41. The core rod 10 is accommodated in the second cavity 42, and the outer peripheral surface of the core rod 10 is slidably engaged with the inner peripheral surface of the second cavity 42. And the limiting portion 23 is used for being accommodated in the third cavity 43.

As shown in fig. 1, the mandrel 10 is movably disposed within the die case 40. Specifically, the second cavity 42 of the mold sleeve 40 is connected to the first cavity 41 to form a first boss 412, and the profiling portion 20 is used for being connected to the first boss 412 in a snap fit manner. The second cavity 42 and the third cavity 43 are connected to form a second boss 413, and the limiting portion 23 is used for being connected with the second boss 413 in a clamping and matching manner. In this embodiment, as shown in fig. 1, the first boss 412 and the second boss 413 are used for limiting the position of the mandrel 10 moving in the die sleeve 40.

Preferably, the first cavity 41, the second cavity 42 and the third cavity 43 are all cylindrical cavities, and the inner diameter of the second cavity 42 is smaller than the inner diameter of the first cavity 41, and the inner diameter of the second cavity 42 is smaller than the inner diameter of the third cavity 43. Preferably, the first cavity 41 is fixedly connected with the second cavity 42, and the second cavity 42 is fixedly connected with the third cavity 43. And preferably, the outer circumferential surface of the die case 40 is detachably mounted to a holder 44.

In addition, referring to fig. 1, a limiting end 45 is disposed at one end of the die case 40 close to the part 200, the limiting end 45 is used for being in the pressing cavity 205 of the part 200, and an end of the limiting end 45 is used for being in contact fit with the second step 204 between the pressing cavity 205 and the positioning cavity 203.

Continuing to refer to fig. 1, the error-proofing apparatus further comprises an elastic member 50, the elastic member 50 is connected to the end of the mandrel 10 away from the profiling portion 20, and the elastic member 50 is further connected to the inner peripheral surface of the third cavity 43 of the die sleeve 40. Specifically, the elastic member 50 is sleeved on the outer circumferential surface of the mandrel 10, and the elastic member 50 moves in the third cavity 43, and the elastic member 50 contacts the second boss 413. The elastic member 50 serves to perform a buffering and rebound function. Preferably, the elastic member 50 is a spring.

In the present embodiment, the position where the part 200 is placed in the shaping die 300 is detected by the error-proofing device, and if the second engagement portion 22 of the copying portion 20 can be engaged with the positioning cavity 203 of the part 200 placed in the shaping die 300, the stopper portion 23 of one end of the mandrel 10 away from the copying portion 20 is not in contact with the sensor 30. The elastic member 50 on the mandrel 10 is in a natural telescopic state. At this time, the position of the part 200 in the sizing die 300 is a standard position.

If the second matching portion 22 of the profiling portion 20 can only match with the press-fit cavity 205 of the shaping mold 30, that is, the core rod 10 drives the limiting portion 23 to displace toward the side away from the part 200, when the second matching portion 22 of the profiling portion 20 matches with the second step 204 of the press-fit cavity 205, the limiting portion 23 and the sensor 30 are changed from the separated state to the contact state, that is, the limiting portion 23 of the core rod 10 triggers the sensor 30 to operate. And, the profiling part 20 is matched with the second step 204 of the pressing cavity 205 of the part 200, that is, the elastic member 50 is in a compressed state during the contact process of the limiting part 23 and the sensor 30.

In this embodiment, the error-proofing device further includes an alarm (not shown). The alarm is in electrical signal connection with the sensor 30. If the position of the part 200 disposed in the shaping mold 300 deviates from the standard position, when the error-proofing device is used to detect the position of the part 200, the core rod 10 will contact with the sensor 30, the core rod 10 will trigger the sensor 30 to operate, the sensor 30 will be linked with the alarm to give an alarm, after the alarm gives an alarm, the limiting end 45 of the die sleeve 40 immediately stops pressing down the pressing cavity 205 of the part 200, that is, the part 200 is stopped from being continuously pressed into the shaping mold 300, so as to prevent the part 200 from damaging the shaping mold 300 due to dislocation. After the alarm sounds, the position where the part 200 is disposed in the shaping mold 300 needs to be readjusted until the standard position is reached, and the elastic member 50 rebounds the mandrel 10 to the original position. That is, when the position at which the part 200 is disposed in the shaping mold 300 is the standard position, the mandrel 10 and the sensor 30 are separated from each other, and both the sensor 30 and the alarm are in the inactive state.

Referring to fig. 1, the error-proofing device further includes a clamping mechanism 60, the clamping mechanisms 60 are respectively connected to the sensors 30, the clamping mechanism 60 is used for being fixedly connected to the mold chase 40, and the clamping mechanism 60 is used for suspending and fixing the sensors 30.

The error-proofing device of the present invention detects whether the position of the part 200 disposed in the shaping mold 300 is a standard position, the error-proofing device includes a core rod 10, a profiling portion 20 is disposed on one side of the core rod 10 close to the part 200, a sensor 30 is disposed on one side of the core rod 10 away from the part 200, and the outer surface of the profiling portion 20 is used for being in irregular fit with the inner surface of the cavity of the part 200; the mandrel 10 is movable in both directions in the axial direction, and the side of the mandrel 10 facing away from the profile section 20 is separated from or in contact with the sensor 30. Specifically, when the position where the part 200 is arranged in the shaping mold 300 is the standard position, the first fitting portion 21 of the copying portion 20 is configured to be fitted with a press-fit cavity of a cavity of the part 200, the outer peripheral surface of the second fitting portion 22 is configured to be fitted with a positioning cavity 203 of the cavity after passing through the press-fit cavity 205, and the end of the core rod 10 facing away from the part 200 is separated from the sensor 30; when the position of the part 200 arranged in the shaping mold 300 deviates from the standard position, the second matching part 22 of the copying part 20 is matched with the pressing cavity 205, and the end of the core rod 10 facing away from the part 200 is contacted with the sensor 30 to trigger the sensor 30 to work. The sensor 30 is electrically connected with the alarm, and the sensor 30 works and is linked with the alarm to alarm and scram. Accordingly, it is possible to solve the problem that the shaping mold 300 is damaged due to a wrong position in which the part 200 is placed in the shaping mold 300.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims (11)

1. A mistake proofing device for detecting whether a position at which a part is disposed in a sizing die is a standard position, comprising:

one end of the core rod extends along the axial direction of the core rod to form a profiling part, and the outer surface of the profiling part is used for being in special-shaped fit with the inner surface of the cavity of the part;

the sensor is arranged on one side of the mandrel, which is far away from the profiling part; wherein,

the mandrel is movable in both directions in the axial direction, and an end of the mandrel facing away from the profiling portion is separated from or in contact with the sensor.

2. The error-proofing device according to claim 1, wherein the contour portion includes a first engagement portion and a second engagement portion formed by the first engagement portion extending in the axial direction toward a side away from the mandrel, the second engagement portion being integrally connected to the first engagement portion.

3. The mistake proofing device of claim 2, wherein the outer peripheral surface of the second engaging portion is adapted to engage with the positioning cavity of the cavity after passing through the press-fit cavity of the cavity, and the first engaging portion of the copying portion is adapted to engage with the press-fit cavity of the part, so that an end of the mandrel facing away from the copying portion is separated from the sensor in a state where the position where the part is disposed in the shaping mold is the standard position.

4. The error-proofing device according to claim 2, wherein the second engagement portion of the profiling portion is adapted to engage with a press-fit cavity of the cavity, so that in a state where the part is disposed in the shaping mold at a position deviated from the standard position, an end of the mandrel away from the profiling portion contacts the sensor to trigger the sensor to operate.

5. The error-proofing device of claim 2, further comprising a die sleeve, wherein the outer wall of the mandrel is slidably fitted to the inner wall of the die sleeve, and one end of the die sleeve close to the part is a limiting end for contacting a pressing cavity of a cavity for pressing the part.

6. The mistake proofing device of claim 5 wherein the die sleeve comprises a first cavity, a second cavity and a third cavity, wherein the second cavity and the first cavity form a first boss and the second cavity and the third cavity form a second boss.

7. The mistake proofing device of claim 6 wherein the outer peripheral surface of the first engagement portion of the contoured portion is adapted to slidably engage with the inner peripheral surface of the first cavity, the first engagement portion being adapted to snap-fit with the first boss; the outer peripheral surface of the core rod is used for being in sliding fit with the inner peripheral surface of the second cavity; one end of the core rod, which is deviated from the profiling part, extends axially to form a limiting part, the peripheral surface of the limiting part is used for being in clearance fit with the third cavity, and the limiting part is used for being connected with the second boss in a clamping and matching manner.

8. The mistake proofing device of claim 7 further comprising an elastic member, wherein the elastic member is movably connected with the limiting portion, and the elastic member is also movably connected in the third cavity of the die case.

9. The error proofing apparatus of claim 8 further comprising a clamping mechanism, wherein the clamping mechanism is fixedly connected to the sensor and the clamping mechanism is fixedly connected to the die case.

10. The error protection device of claim 9, further comprising an alarm in electrical communication with the sensor, wherein the alarm is configured to activate the alarm after the mandrel triggers the sensor to operate.

11. The error-proofing device of claim 10, wherein the contoured portion is integrally connected with the mandrel; the first matching part is integrally connected with the second matching part.

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