WO2017140236A1

WO2017140236A1 - Screw detection device for use in screw manufacturing equipment

Info

Publication number: WO2017140236A1
Application number: PCT/CN2017/073498
Authority: WO
Inventors: 李佑龙
Original assignee: 李佑龙
Priority date: 2016-02-15
Filing date: 2017-02-14
Publication date: 2017-08-24
Also published as: KR20170095535A; CN108883439B; CN108883439A; KR101870015B1

Abstract

A screw detection device for use in a screw manufacturing equipment comprises: a conduction-sensing sensor (100) in contact with a tail portion of a metal wire (W) for manufacturing a screw which is drawn into the interior of the screw manufacturing equipment (S); a first setting portion (410) for setting a time period in which a current conducts when the conduction-sensing sensor (100) is in contact with the metal wire (W); a first determination portion (440) for determining whether the conduction-sensing sensor (100) is in contact with the metal wire (W) and determining that the wire (W) is normal or defective by performing a comparison with the time period set by the first setting portion (410); a display portion (490) for displaying, according to the determination made by the first determination portion (440), the determination indicating whether or not the wire (W) passes. When a product defect occurs in a screw manufacturing process, the screw detection device for use in the screw manufacturing equipment can perform real-time detection on the defective product and automatically separate and discard the same without interrupting the screw manufacturing equipment (S), and can perform filtering to quickly obtain and output screws with acceptable quality. Moreover, the invention has improved detection accuracy, reliability and increased productivity.

Description

Screw detecting device for screw manufacturing equipment

Technical field

The present invention relates to a screw detecting device for a screw manufacturing apparatus, characterized in that the screw detecting device can sense and distinguish a screw defect in real time in a continuous screw production operation using a screw manufacturing device, and perform defective products and qualified products in real time. Screening and shipping.

Background technique

Generally, screws, as a mechanical element, are often used to fasten building materials, machine parts, and the like, having a head having a cross or a groove formed thereon, and a trunk portion having a thread formed on the outer diameter surface.

The manufacture of the screws usually uses automated manufacturing equipment for continuous production operations, and the screws produced by the machine equipment tend to be paralyzed by the precision of the manufacturing equipment, the quality of the raw material wires, the working environment conditions, and the operator's operational proficiency.

Therefore, the shape of the screw produced in real time deviates from the set value. In this case, real-time monitoring is required, and it is also necessary to timely screen out the bad screws that appear in the manufacturing process, and only ship the qualified screws. Because this is directly related to the reliability of the product.

Generally, the manufacturing process of the screw mainly comprises the following two steps: the first step is a plastic working process, in which the raw metal wire of the screw is first cut according to a certain length, and then the cut wire segment is placed in a molding die. Then, the first stamping forming head is performed, and the second stamping is performed on the wire segment forming the head to form the groove; the second step, the rolling of rod process, the fixed molding in the face-to-face mounting The wire segment formed with the head is placed between the module and the movable molding module, and the trunk portion is rolled to form a thread of the outer diameter of the trunk portion.

In addition, these screws for fastening automobile parts, building materials or machine parts, etc., and the production equipment of such small parts can quickly judge whether the manufactured parts are qualified or not, and the result of the judgment, that is, the manufactured parts Qualified or unqualified screening and classified storage can completely determine production efficiency.

As described above, in the manufacturing process of the screw, there is a possibility that the manufacturing of the screw is poor. For example, in the first step of the plastic working process, the raw material wire of the screw is introduced into the interior of the screw manufacturing apparatus with a certain length. In the case where the cut length is longer or shorter than the set length; in addition, when the cut wire portion is subjected to head molding, the molding module is required to punch one end of the wire segment while reciprocating in the front-rear direction. In this process, there may be cases where the round-trip time and speed of the molding module and the pressure of pressurizing one end of the wire segment are inconsistent or unbalanced; finally, when the groove is processed on the wire segment where the head has been formed The head is required to be stamped using a male corner mold, but the normal shape groove may not be formed on the head due to wear or damage of the male corner mold.

In the second step of the rolling of rod process, when the trunk portion of the wire segment in which the head has been formed is threaded, the wire segment transported by the transport line may have uneven spacing. .

As mentioned above, the defective part of the screw may cause the overall defect of the finished product, so it is necessary to check whether the screw is defective by means of comprehensive inspection.

In the prior art, there is no additional device for performing real-time bad detection and screening on a large number of screws produced by the screw manufacturing equipment in a short time, but it is necessary to manually perform sampling inspection on the screw delivered by the screw manufacturing equipment, and when a defective product is found, The manufacturing equipment will be interrupted to find out the cause of the product failure.

However, most of the prior art methods as described above need to be separately equipped for the inspection and screening work, thereby causing unnecessary waste of personnel, and inevitably increasing the production cost, and the inspection method by the operator visually. Will greatly reduce the efficiency and reliability of the test.

In addition, since it is necessary to interrupt the manufacturing equipment in the event of a product failure, the manufacturing time is inevitably prolonged, resulting in a decrease in production efficiency.

[Prior technical literature]

[Patent Literature]

(Patent Document 0001) Republic of Korea Public Patent Gazette No. 10-1998-050030 (published on September 15, 1998)

(Patent Document 0002) Republic of Korea Public Patent Gazette No. 10-2003-0081225 (published on October 17, 2003)

(Patent Document 0003) Republic of Korea Authorized Patent Gazette No. 10-1183537 (announcement of September 20, 2012)

(Patent Document 0004) Republic of Korea Public Patent Gazette No. 10-2013-0096121 (publicized on August 29, 2013)

Summary of the invention

In order to solve the above problems, the present invention provides a screw detecting device for a screw manufacturing apparatus, which can detect a defective product in real time without interrupting the operation of the screw manufacturing apparatus when a screw manufacturing process occurs. And automatically separate the shipment, and can quickly filter and ship the qualified screws.

In addition, an auxiliary problem to be solved by the present invention is to provide a screw detecting device for a screw manufacturing device which uses an electrical contact type sensor and a non-electrical contact type sensor, that is, in an electrical contact type sensor Based on the addition of a non-electrical contact type magnetic field sensor, the accuracy and reliability of the detection are improved.

In order to solve the above-described technical problems, the present invention comprises a control unit comprising: an energization sensing sensor that is in contact with a tail end of a metal wire for screw manufacturing introduced into a screw manufacturing apparatus; a first setting unit, said power ups The time at which the current is energized when the sensor is in contact with the wire is set; the first determining unit determines whether the current sensor is in contact with the wire, and determines the wire by comparing the time set by the first setting unit. Normal or defective; the display unit displays whether the wire is qualified or not based on the determination by the first determining unit.

The present invention also has a first magnetic sensor that is mounted to the molding module in a non-contact manner for sensing the molding module. The molding module drives the cut end of the wire segment to perform a back and forth reciprocating motion and presses to form a screw head and a groove of the wire segment.

The control unit further includes a second setting unit configured to set a distance between the molding module and the first magnetic sensor, and a second determination unit that is set in comparison with the second setting unit. Distance to determine whether the wire segment is normal or defective. The normal or defective state of the wire determined by the second determination unit is displayed by the display unit.

The control unit further includes a first screening unit that filters the defective wire segments determined by the first determining unit and the second determining unit.

The first screening unit may screen out a certain partial region of the defective wire segment that is determined to be defective by the first determining unit and the second determining unit.

The control unit is characterized in that the first determination unit and the second determination unit continuously determine that the wire and the wire segment are defective, and when a certain number is reached, the screw manufacturing device stops operation.

The present invention also has a second magnetic sensor. After the wire segment is formed and the screw head is shipped out, the magnetic sensor is mounted in a non-contact state at one end of the wire segment for sensing the wire segment.

The control unit further includes a third setting unit configured to set a distance between the second magnetic sensor and one end of the wire segment, and a third determining unit that sets the third setting unit in comparison with the third setting unit. The distance is thus judged whether the wire segment is normal or defective. The normal or defective state of the wire segment determined by the third determination unit is displayed by the display unit.

The control unit further includes a second screening unit for screening the defective wire segment determined by the third determining unit.

The second screening unit can screen the front and rear regions of the defective wire segment that are determined to be defective by the third determining unit.

The control unit is characterized in that if the third determining unit continues to determine that the wire segment has a defect, the screw manufacturing device stops running when a certain amount is reached.

The present invention also includes a lubricating oil control unit for controlling the lubricating oil discharged from the inside of the screw manufacturing apparatus, and an air control unit for controlling the compressed air jetted to the wire section.

The invention has the following effects: when a defect occurs in the screw manufacturing process, the defective product can be detected in real time without interrupting the screw manufacturing equipment and automatically separated and transported, and the qualified product can be quickly screened and transported, thereby improving production. effectiveness.

In addition, the present invention also uses a hybrid sensing sensor that mixes electrical contact sensors and non-electrical contacts. The sensor adds a non-electrical contact type magnetic field sensor to the electrical contact sensor, thereby improving the accuracy and reliability of the detection.

DRAWINGS

The following schematic drawings of the present invention are merely preferred embodiments of the present invention, and are used to better understand the technical idea of the present invention.

1 to 7 are diagrams showing an example of a screw detecting device for a screw manufacturing apparatus according to an embodiment of the present invention.

8 to 13 are reference diagrams of use of a screw detecting device for a screw manufacturing apparatus according to an embodiment of the present invention.

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the screw detecting device for a screw manufacturing apparatus of the present invention will be described in detail with reference to the accompanying drawings.

1 to 7 are schematic views of a screw detecting device for a screw manufacturing apparatus according to an embodiment of the present invention.

Referring to FIGS. 1 through 7, a screw detecting device for a screw manufacturing apparatus according to a preferred embodiment of the present invention, the main constituent elements are an energization sensing sensor (100) and a control unit (400), which will be described in detail below. .

The energization sensing sensor (100) is used in a first step of a plastic working process for manufacturing a screw, the energization sensing sensor being mounted inside the screw manufacturing apparatus (S), and with the control unit (400) Phase electrical connection.

When the screw raw material wire (W) is introduced into the screw manufacturing apparatus (S) according to the set length, it is moved forward while being cut by the cutting device, and inserted into the inside of the molding table in accordance with the predetermined length to form the screw head and the groove.

At this time, before the wire (W) is cut to a certain length by the cutting device, the tail end of the wire (W) instantaneously comes into contact with the energization sensing sensor (100) to complete the energization.

The control unit (400) is provided with a first setting unit (410), a first determining unit (440), and a display unit (490).

The first setting unit (410) is configured to set a current energization time to the wire (W) when the energization sensing sensor (100) is in instantaneous contact with the tail end of the wire (W).

The first determining unit (440) is configured to determine whether the energization sensing sensor (100) is in contact with the wire (W), and compare the energization time set by the first setting unit (410) to determine the wire. Normal or not.

The display unit (490) is preferably a touch panel, and can be set by the touch panel to display a normal or defective state of the wire (W) determined by the first determining unit (440).

That is, if the energization sensing sensor (100) is not in contact with the wire (W) and cannot be energized, it means that the wire (W) has been cut off without being completely introduced into the inside of the screw manufacturing device (S) according to the preset length. In the above situation, the wire will The first determination unit (440) determines that the failure is caused by the first determination unit (440), and is displayed on the display unit (490) or marked as defective.

Further, even if the energization sensing sensor (100) is in contact with the wire (W) and is energized, the energization time is shorter or longer than the energization time set by the first setting unit (410), and the first determination is performed. The portion (440) also judges the wire in this case as defective and displays it as defective on the display portion (490).

At this time, the energization time range may be reduced or increased by the first setting unit (410), or the current sensing sensor (100) may be selectively adjusted to sense the current sensitivity as accurate or retarded.

Meanwhile, the screw detecting device for a screw manufacturing apparatus according to the present invention further includes a first magnetic sensor (200).

The first magnetic sensor (200) is used in the first step of manufacturing a plastic in a plastic working process like the energization sensing sensor (100), and is installed inside the screw manufacturing device (S). The control unit (400) is electrically connected.

The wire (W) is introduced into the inside of the screw manufacturing equipment (S) according to the set length, and is moved forward while being cut into the wire section (W') by the cutting device, and inserted into the inside of the molding table according to the set length, Forming the screw head and the groove forming module (B) on the wire section (W') to perform a back-and-forward movement, and punching the cut end of the wire section (W'), at this time, the first magnetic A sensor (200) is mounted on the molding module (B) in a non-contact manner to sense the reciprocating motion of the molding module (B).

Further, the control unit (400) further includes a second setting unit (420) and a second determining unit (450).

The second setting unit (420) is for setting a separation distance between the molding module (B) and the first magnetic sensor (200).

The second determination unit (450) compares the distance set by the second setting unit (420) to determine whether the wire is normal or defective.

Further, the normal or defective state of the wire segment (W') determined by the second determining unit (450) will be reflected on the display portion (490).

In more detail, if the molding module (B) is advanced toward the wire segment (W') and one end of the wire segment (W') is punched, the molding module (B) is close to the first magnetic sensor (200). The magnetic field is sensed by the first magnetic sensor (200), and the closer the molding module (B) is to the first magnetic sensor (200), the greater the magnetic field strength. Conversely, after the wire segment (W') is stamped, the molding module (B) is formed. When the gradual retreat, the intensity of the magnetic field sensed by the first magnetic sensor (200) gradually becomes weak.

According to the above principle, the strength of the magnetic field sensed by the first magnetic sensor (200) can be set, that is, the distance between the molding module (B) and the first magnetic sensor (200) determines the strength of the magnetic field.

The distance between the molding module (B) set by the second setting unit and the first magnetic sensor (200) is regarded as a standard distance, and when the molding module (B) fails to be close enough according to the set standard distance 1 magnetic sensor (200) or front When the first magnetic sensor (200) is touched too much, the second determination unit (450) determines that the situation is defective, and displays or marks the defect on the display display unit (490).

In this case, the distance between the molding module (B) and the first magnetic sensor (200) may be increased or decreased by the second setting unit (420), or the first magnetic sensor (200) may be used. The sensitivity of the perceived magnetic field is adjusted to be precise or slow.

Further, the control unit (400) is further provided with a first screening unit (470).

The first screening unit (470) is configured to screen a wire segment (W') that is determined to be defective by the first determining unit (440) and the second determining unit (450).

The wire segment (W') is held on the molding table and formed into a screw head and a groove by punching of the molding module (B), and then discharged and transported away by the molding table. At this time, the wire can be continuously discharged. The wire segment (W') judged to be defective in the segment (W') is subjected to poor screening in the front and rear regions. At this time, the standard number of the defective wire segments (W') can be set.

As described above, the defective wire segment (W') may be blended with a good product, which is also an indispensable means for improving the reliability of the test.

At this time, the first determining unit (440) and the second determining unit (450) of the control unit (400) continuously determine that there is a defect in the wire (W) and the wire segment (W') and the defective product exceeds a certain value. When the quantity is exceeded, the screening will be interrupted and the operation of the screw manufacturing equipment (S) will be aborted.

Further, the screw detecting device for a screw manufacturing apparatus according to the present invention further includes a second magnetic sensor (300).

The second magnetic sensor (300) is used in a second rolling process of the first step of manufacturing a screw after the plastic working process, the second magnetic sensor and the second magnetic sensor The control unit (400) is electrically connected. The rolling processing process is: inserting the wire section (W') formed with the head between the fixed molding module and the movable molding module installed face to face, and rolling the trunk portion thereof The outer diameter of the trunk portion is threaded.

That is, the second magnetic sensor (300) is mounted on the end of the wire segment in a non-contact state after the wire section (W') is finished, and is used to sense the wire segment (W'). .

Here, those wire segments (W') that have been identified as qualified products after forming the screw head by the molding process will be transported in a vertical state with the screw heads facing upward through a preset transfer line, and finally flow into the rolling process. Between the fixed molding module and the movable molding module, the second magnetic sensor (300) is attached to the upper portion of the inflowing wire segment (W') in a non-contact manner.

Here, the control unit (400) further includes a third setting unit (430) and a third determining unit (460).

The third setting unit (430) is configured to set a separation distance between the second magnetic sensor (300) and one end of the wire segment (W').

The third determination unit (460) compares the distance set by the third setting unit to determine whether the wire segment (W') is normal or defective.

Further, the normal or defective state of the wire segment (W') determined by the third determining unit (460) is reflected on the display portion (490).

More specifically, when the wire segment (W') conveyed by the predetermined transfer line approaches the second magnetic sensor (300), the second magnetic sensor (300) senses and generates a magnetic field, and if compared with the third setting The intensity of the magnetic field is increased when the sensing wire segment (W') of the portion (430) is set closer to the distance, and the strength of the magnetic field is weakened if the distance is sensed.

That is, it is judged to be normal if the height of the wire segment (W') conveyed by the transfer line is within the set separation distance, and otherwise it is determined to be defective.

In addition, the control unit (400) further includes a second screening unit (480).

The second screening unit (480) is for screening a wire segment (W') that is determined to be defective by the third determining unit.

After the wire section (W') which has been sensed by the second magnetic sensor (300) is finished, the rolling process is carried out, and at this time, it can be judged as bad in the continuously discharged wire section (W'). The wire segment (W') performs a poor screening of the front and rear regions. At this time, the standard number of the defective wire segments (W') can be set.

At this time, when the third determining unit (460) of the control unit (400) continuously determines that there is a defect in the wire segment (W') and the defective product exceeds a certain number, the screening is interrupted, and the screw manufacturing device (S) The operation will be aborted.

Further, the screw detecting device for a screw manufacturing apparatus according to the present invention further includes a lubricating oil control portion (500) and an air control portion (600).

The lubricating oil control unit (500) is a switch for controlling the oil pressure of the lubricating oil discharged from the inside of the screw manufacturing apparatus and the supply of the lubricating oil.

The air control portion (600) is used in the first step molding process of the screw manufacturing, and the wire segment (W') is held on the molding table by the stamping forming screw head and concave of the molding module (B). After the tank, the wire section (W') side of the forming station is pushed out by pressurizing the discharge valve, at which time the compressed air is ejected from the nozzle section to the wire section (W') from time to time. Cause the wire segment to fall.

The air control unit (600) controls the injection switch of the nozzle by compressing air.

The above description of the present invention is not intended to limit the technical idea of the present invention, and it should be noted that those skilled in the art, without departing from the inventive concept, the present invention Modifications and variations are possible within the scope of the appended claims.

[Description of Reference Signs]

100: Power-sensing sensor

200: 1st magnetic sensor

300: 2nd magnetic sensor

400: Control unit

410: The first setting unit

420: 2nd setting section

430: 3rd setting section

440: The first judgment department

450: The second judgment department

460: The third judgment department

470: The first screening department

480: 2nd screening department

490: Display section

500: Lubricating Oil Control Department

600: Air Control Department

B: molding module

S: Screw manufacturing equipment

W: wire

W': wire segment

Claims

A screw detecting device for a screw manufacturing apparatus, comprising: a control assembly (400), the control assembly (400) being provided with: an energization sensing sensor (100) coupled to the inside of the screw manufacturing device (S) The tail end of the metal wire (W) for screw manufacturing is in contact with each other; and the first setting unit (410) sets a time during which the current is energized when the energization sensing sensor (100) is in contact with the wire (W); The first determining unit (440) determines whether the energization sensing sensor (100) is in contact with the wire (W), and determines whether the wire is normal by comparing the time set by the first setting unit (410). Or the display unit (490) displays the eligibility of the wire (W) based on the judgment of the first determining unit (440).
A screw detecting device for a screw manufacturing apparatus according to claim 1, further comprising a first magnetic sensor (200) mounted to the molding module of the screw manufacturing apparatus (S) in a non-contact manner (B) Above, for sensing the molding module (B), the molding module (B) drives the tail end of the cut wire segment (W') to perform back and forth reciprocating motion and punching to form the wire segment (W) ') Screw head and groove.
A screw detecting device for a screw manufacturing apparatus according to claim 2, wherein said control unit (400) further comprises: a second setting portion (420) for setting said molding module (B) a separation distance from the first magnetic sensor (200); and a second determination unit (450) that compares the distance set by the second setting unit (420) to determine the wire segment (W') Normal or defective, and the normal or defective state of the wire segment (W') determined by the second determining unit (450) is displayed on the display unit (490).
A screw detecting device for a screw manufacturing apparatus according to claim 3, wherein said control unit (400) further comprises a first screening unit (470) for screening by the first determining unit (440) And the second determination unit (450) determines that the wire segment (W') is defective.
The screw detecting device for a screw manufacturing apparatus according to claim 4, wherein the first screening unit (470) can be screened by the first determining unit (440) and the second determining unit (450). The front and rear sections of the wire segment (W') that are defective and shipped out.
A screw detecting device for a screw manufacturing apparatus according to claim 5, wherein said control unit (400) has a first determining unit (440) and a second determining unit (450) continuously determining the position Wire (W) and wire When the material section (W') is defective, and the defective product reaches a certain amount, the screw manufacturing apparatus (S) is stopped.
A screw detecting device for a screw manufacturing apparatus according to claim 1, further comprising: a second magnetic sensor (300) mounted in a non-contact state to the wire which has been formed and screwed out One end of the segment (W') to sense the wire segment (W').
A screw detecting device for a screw manufacturing apparatus according to claim 7, further comprising: a third setting portion (430) for setting said second magnetic sensor (300) and a wire segment a distance between one end of (W'); a third determining unit (460) that compares the distance set by the third setting unit (430) to determine whether the wire segment (W') is normal or defective, and The normal or defective state of the wire segment (W') determined by the third determining unit (460) is displayed on the display unit (490).
A screw detecting device for a screw manufacturing apparatus according to claim 8, wherein said control unit (400) further comprises a second screening unit (480) for screening by the third determining unit (460) ) Defective wire segment (W').
The screw detecting device for a screw manufacturing apparatus according to claim 9, wherein the second screening unit (480) can screen out a wire that is determined to be defective by the third determining unit (460). Segment (W') before and after the unqualified interval.
A screw detecting device for a screw manufacturing apparatus according to claim 10, wherein said control unit (400), said third determining portion (460) continues to determine that said wire segment (W') has The screw manufacturing equipment (S) is stopped when the defective product is generated and the defective product reaches a certain amount.
A screw detecting device for a screw manufacturing apparatus according to claim 1, further comprising: a lubricating oil control portion (500) for controlling a lubricating oil discharged from the inside of said screw manufacturing device (S) An air control unit (600) for controlling the compressed air injected to the wire section (W').