KR100538064B1 - A manufacturing process of ball joint for car utilizing high frequency - Google Patents
A manufacturing process of ball joint for car utilizing high frequency Download PDFInfo
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- KR100538064B1 KR100538064B1 KR10-2003-0085904A KR20030085904A KR100538064B1 KR 100538064 B1 KR100538064 B1 KR 100538064B1 KR 20030085904 A KR20030085904 A KR 20030085904A KR 100538064 B1 KR100538064 B1 KR 100538064B1
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- high frequency
- ball joint
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
- F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
- F16C11/0685—Manufacture of ball-joints and parts thereof, e.g. assembly of ball-joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
본 발명은 고주파를 이용한 자동차용 볼조인트의 제조방법에 관한 것으로, 더욱 상세하게는 볼(ball)과 볼시트(ball seat) 사이의 이격공간을 형성시키기 위해 에이징 챔버로 열처리하는 종래의 공정을 전기 고주파로 열처리함으로써, 에이징 챔버로 열처리하는데 발생되는 부수적인 작업 공정을 단축할 수 있을 뿐만 아니라 작업시간 및 작업공간도 절감하여 생산효율을 극대화시킬 수 있는 자동차용 볼조인트의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a ball joint for automobiles using high frequency, and more particularly, to a conventional process of heat treatment with an aging chamber to form a space between a ball and a ball seat. By heat treatment at high frequency, it is possible to shorten the ancillary work process generated in the heat treatment with the aging chamber, and also to a method of manufacturing a ball joint for a vehicle that can maximize the production efficiency by reducing the work time and work space.
본 발명에 따르면, 열처리공정(S4)은 순간 대전류 발생용 고주파열처리기(50)를 이용하여 볼스터드(30)의 나사부(32) 상단으로 고주파를 방출하여서 됨을 특징으로 하는 고주파를 이용한 자동차용 볼조인트의 제조방법이 제공된다.According to the present invention, the heat treatment step (S4) is a high-speed automotive ball using a high frequency, characterized in that by emitting a high frequency to the upper end of the screw portion 32 of the ball stud 30 using the high-frequency heat processor 50 for instantaneous generation A method of making a joint is provided.
Description
본 발명은 고주파를 이용한 자동차용 볼조인트의 제조방법에 관한 것으로, 더욱 상세하게는 볼(ball)과 볼시트(ball seat) 사이의 이격공간을 형성시키기 위해 에이징 챔버로 열처리하는 종래의 공정을 전기 고주파로 열처리함으로써, 에이징 챔버로 열처리하는데 발생되는 부수적인 작업 공정을 단축할 수 있을 뿐만 아니라 작업시간 및 작업공간도 절감하여 생산효율을 극대화시킬 수 있는 자동차용 볼조인트의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a ball joint for automobiles using high frequency, and more particularly, to a conventional process of heat treatment with an aging chamber to form a space between a ball and a ball seat. By heat treatment at high frequency, it is possible to shorten the ancillary work process generated in the heat treatment with the aging chamber, and also to a method of manufacturing a ball joint for a vehicle that can maximize the production efficiency by reducing the work time and work space.
일반적으로 볼조인트(ball joint)는 부품과 부품사이를 3차원적으로 상대회전하게 연결시켜 주는 기계요소로써, 샤시암류 등과 같이 자동차의 스티어링 또는 서스펜션 계통에서 사용되고 있다.In general, the ball joint (ball joint) is a mechanical element that connects the parts and parts in relative rotation between the three-dimensional, and is used in the steering or suspension system of the car, such as chassis arms.
종래의 볼조인트 구조 및 제조방법을 살펴보면, Looking at the conventional ball joint structure and manufacturing method,
먼저 볼조인트의 구조는 상측은 나사부(32)로 형성되고, 하측은 구형상의 볼(31)로 형성된 볼스터드(30)와; 상기 볼스터드(30)의 볼(31) 외표면을 감싸고 있는 플라스틱 볼시트(20)와; 볼삽입부(11)가 형성되어져 볼스터드(30)의 볼(31)이 삽입되는 소켓(10)과; 볼스터드(30)가 삽입된 소켓(10)의 상측부를 커버하는 더스트 커버(40);의 조합으로 형성되어져 있으며, 도 1에 도시된 바와 같이 소켓(10) 내부의 볼삽입부(11)에 볼시트(20)를 삽입하는 볼시트 삽입공정(S1)과; 그리스(Grease)가 충진된 볼시트(20)에 볼스터드(30)를 코킹(calking)하고, 코킹시 발생된 소켓(10)의 돌기(12)를 밀봉하는 볼스터드 압입공정(S2)과; 볼조인트(100)를 에이징 챔버에 삽입하여 볼(31)과 볼시트(20) 사이에 이격공간을 형성하는 열처리공정(S3)과; 소정시간동안 자연냉각하는 냉각공정(S4)과; 냉각된 볼조인트(100)의 소켓(10) 상측으로 더스트 커버(40)를 장착하는 커버장착공정(S5);을 거쳐서 제조하게 된다.First of all, the ball joint structure has a ball stud 30 formed of a threaded portion 32 at an upper side thereof and a ball 31 formed at a lower side thereof; A plastic ball seat 20 surrounding the outer surface of the ball 31 of the ball stud 30; A socket inserting portion 11 formed therein so that the ball 31 of the ball stud 30 is inserted into the socket 10; The dust cover 40 covering the upper part of the socket 10 into which the ball stud 30 is inserted is formed in a combination, and as shown in FIG. 1, the ball inserting portion 11 inside the socket 10 is formed. A ball sheet inserting step (S1) for inserting the ball sheet 20; A ball stud indentation step S2 of caulking the ball stud 30 to the ball seat 20 filled with grease and sealing the protrusion 12 of the socket 10 generated during caulking; A heat treatment step S3 of inserting the ball joint 100 into the aging chamber to form a space between the ball 31 and the ball seat 20; A cooling step of naturally cooling for a predetermined time (S4); It is manufactured through the cover mounting step (S5) for mounting the dust cover 40 above the socket 10 of the cooled ball joint 100.
상기 공정중 열처리공정에 대해 좀더 상세히 설명하면, In more detail about the heat treatment process in the process,
볼시트 삽입공정, 볼스터드 압입공정을 통해 형성된 볼조인트는 상기 공정라인과는 별도의 장소에 구비된 에이징 챔버에 삽입되고, 삽입된 볼조인트는 소정 온도와 시간동안 열처리되는데, 열처리시 볼은 금속재이므로 열에 의해 그 부피가 팽창하게 되고, 볼시트도 플라스틱재이므로 볼과 함께 팽창하게 된다. 상기와 같은 열처리가 완료된 볼조인트는 소정시간동안 자연냉각하여 팽창된 볼과 볼시트를 복원시키게 되는데, 금속재인 볼은 복원력이 빠른 반면 플래스틱재인 볼시트는 복원력이 느리고 원상태로 완전히 복원되지 않아 볼과 볼시트 사이에 이격공간이 발생하게 되고, 그로 인하여 볼스터드의 회전운동이 가능하게 되는 것이다.The ball joint formed through the ball seat insertion process and the ball stud indentation process is inserted into an aging chamber provided at a place separate from the process line, and the inserted ball joint is heat-treated for a predetermined temperature and time. Therefore, the volume is expanded by heat, and because the ball sheet is also made of plastic is expanded with the ball. After the heat treatment is completed, the ball joint is naturally cooled for a predetermined time to restore the expanded ball and the ball sheet. The ball made of metal has a high restoring force, while the ball sheet made of plastic has a low restoring force and is not completely restored to its original state. The spacing space is generated between the ball seat, thereby enabling the rotational movement of the ball stud.
하지만 상기와 같은 열처리공정은 에이징 챔버에 삽입하여 열처리하는데 많은 시간이 소모되고, 열처리 후 자연냉각하는데도 많은 시간이 소모되어 전체 생산공정 속도가 느려지며, 에이징 챔버 전체를 가열하는데도 많은 에너지가 소모되어 비효율적이다. 뿐만 아니라 에이징 챔버는 기존 공정라인과는 별도의 장소에 위치하여 연속적인 생산공정이 불가능하고, 에이징 챔버의 삽입과 자연냉각시 발생되는 부수적인 작업으로 작업공정이 복잡하고 번거러우며, 그 설치면적도 넓어 전체 생산원가의 상승을 유발시켰다.However, the heat treatment process as described above takes a lot of time to insert the heat treatment into the aging chamber, a lot of time is also required to cool naturally after the heat treatment slows down the overall production process, and a lot of energy is consumed to heat the entire aging chamber is inefficient to be. In addition, the aging chamber is located in a separate place from the existing process line, and continuous production process is impossible, and the work process is complicated and cumbersome due to the additional work generated during insertion and natural cooling of the aging chamber, and the installation area is It was also wide, which led to an increase in overall production costs.
또한 열처리시 볼과 함께 팽창되는 볼시트는 자연냉각시 완전히 복원되진 않지만 수축성이 있어 복원력이 발생하게 되는데, 이 복원력에 의해 기동토크가 증대하여 볼스터드의 회전운동을 저하시키는 등 여러가지 문제가 발생되었다. In addition, the ball seat expanded with the ball during heat treatment is not completely restored during natural cooling, but it is shrinkable, so that a restoring force is generated. The restoring force increases the starting torque, which causes various problems such as lowering the rotational motion of the ball stud. .
본 발명은 종래의 이와같은 문제점을 해소하기 위해 안출한 것으로, 삽입공정, 압입공정을 거친 볼조인트에 고주파를 이용하여 열처리를 하는데, 볼조인트의 볼스터드 나사부 상단으로 대전류에 의한 고주파를 순간적으로 방출하고, 그 열로 인해 볼만 팽창함과 동시에 볼시트를 확장시킴으로써, 복원시 볼시트는 거의 복원되지 않으므로 기동토크가 저하되고, 그로 인하여 볼스터드의 회전운동을 원활히 할 수 있다. 또한 별도의 에이징 챔버 삽입공정이 필요하지 않아 작업시간을 최소화시킬 수 있고, 연속적인 작업공정이 가능하여 생산효율을 증대시킬 수 있으며, 볼조인트의 표면을 효율적으로 경화하여 내마모성 및 내피로성을 증대시킬 수 있는 고주파를 이용한 자동차용 볼조인트의 제조방법을 제공코자 하는데 그 목적이 있다. The present invention has been made in order to solve such a problem in the prior art, the heat treatment using a high frequency to the ball joint passed through the insertion process, the press-in process, and emits a high frequency by a large current to the top of the ball stud screw portion of the ball joint instantaneously In addition, by expanding only the ball seat and expanding the ball seat at the same time due to the heat, since the ball seat is hardly restored during restoration, the starting torque is lowered, thereby making it possible to smoothly rotate the ball stud. In addition, it does not need a separate aging chamber insertion process, so it can minimize the working time, and it is possible to increase the production efficiency by enabling the continuous working process, and it can harden the surface of the ball joint to increase wear resistance and fatigue resistance. An object of the present invention is to provide a method for manufacturing a ball joint for a vehicle using high frequency.
소켓(10) 내부의 볼삽입부(11)에 볼시트(20)를 삽입하는 볼시트 삽입공정(S1)과; 그리스가 충진된 볼시트(20)에 볼스터드(30)를 코킹하고, 코킹시 발생된 소켓(10)의 돌기(12)를 밀봉하는 볼스터드 압입공정(S2)과; 볼조인트(100)를 에이징 챔버에 삽입하여 볼(31)과 볼시트(20)를 팽창시키는 열처리공정(S3)과; 소정시간동안 자연냉각하는 냉각공정(S4)과; 소켓(10) 상측으로 더스트 커버(40)를 장착하는 커버장착공정(S5);을 거쳐서 제조되는 통상의 자동차용 볼조인트의 제조방법에 있어서, 상기 열처리공정(S4)은 순간 대전류 발생용 고주파열처리기(50)를 이용하여 볼스터드(30)의 나사부(32) 상단으로 고주파를 방출하여서 됨을 특징으로 하는 것이다.A ball sheet insertion step S1 for inserting the ball seat 20 into the ball insertion part 11 in the socket 10; A ball stud press-in process (S2) for caulking the ball stud 30 to the ball seat 20 filled with grease, and sealing the projection 12 of the socket 10 generated when caulking; A heat treatment step S3 of inserting the ball joint 100 into the aging chamber to expand the ball 31 and the ball seat 20; A cooling step of naturally cooling for a predetermined time (S4); The cover mounting process (S5) for mounting the dust cover 40 above the socket 10; in the manufacturing method of a conventional automotive ball joint manufactured by, the heat treatment step (S4) is a high frequency heat treatment for instantaneous large current generation By using the device 50 is characterized in that to emit a high frequency to the upper end of the screw portion 32 of the ball stud 30.
이하 첨부된 도면을 참조하여 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명의 기술적 사상을 용이하게 실시할 수 있도록 상세하게 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention.
도 1은 종래의 공정을 도시한 상태도, 도 2는 본 발명의 전체 공정을 도시한 블록도, 도 3은 본 발명의 전체 공정을 도시한 상태도, 도 4는 본 발명의 볼시트 삽입공정을 도시한 상태도, 도 5는 본 발명의 압입공정을 도시한 상태도, 도 6는 본 발명의 고주파 열처리상태를 도시한 상태도, 도 7은 본 발명의 볼 복원상태를 도시한 상태도, 도 8은 본 발명의 열처리 및 자연냉각상태를 도시한 상태도로서,1 is a state diagram showing a conventional process, Figure 2 is a block diagram showing the overall process of the present invention, Figure 3 is a state diagram showing the overall process of the present invention, Figure 4 is a ball sheet insertion process of the present invention 5 is a state diagram showing a press-fit process of the present invention, FIG. 6 is a state diagram showing a high frequency heat treatment state of the present invention, and FIG. 7 is a state diagram showing a ball restoring state of the present invention. 8 is a state diagram showing a heat treatment and natural cooling state of the present invention,
볼시트 삽입공정(S1)에서는 도 4에 도시된 바와 같이 소켓(10)에 형성되어 있는 볼삽입부(11)에 상측으로 요철부(21)가 형성되어 있는 볼시트(20)를 삽입하여 소켓(10)과 볼(31)의 마찰을 최소화하였다.In the ball sheet inserting step S1, as shown in FIG. 4, the ball sheet 20 having the uneven portion 21 formed thereon is inserted into the ball inserting portion 11 formed in the socket 10, and then the socket is inserted into the ball inserting portion 11. Friction between the ball 10 and the ball 31 was minimized.
볼스터드 압입공정(S2)에서는 도 5에 도시된 바와 같이 볼시트(20) 내부에 그리스를 충진한 후 압입기(60)를 통해 볼(31)을 볼삽입부(11) 내부로 강제 코킹하는데, 이와같은 강제적인 코킹으로 소켓(10)의 볼삽입부(11) 상측으로는 돌기(12)가 형성된다. 상기에서 형성된 돌기(12)는 볼삽입부(11)측으로 밀어 넣어 볼삽입부(11)를 강력히 밀봉하도록 하는데, 이는 인장하중시 빠지지 않도록 하기 위함이다.In the ball stud indentation process (S2), as shown in FIG. 5, grease is filled in the ball seat 20, and then forced caulking the ball 31 into the ball insertion unit 11 through the indenter 60. As a result of such forced caulking, a protrusion 12 is formed above the ball insertion portion 11 of the socket 10. The projections 12 formed above are pushed toward the ball insertion portion 11 to strongly seal the ball insertion portion 11, so as not to fall out during tensile load.
열처리 공정(S3)에서는 고주파열처리기(50)로 고주파를 방출하는데, 기존의 에이징챔버는 수백도(℃)의 열을 볼조인트(100) 전체가 받기 때문에 1시간 이상의 시간동안 서서히 가열되는 반면, 고주파 통전가열은 볼스터드(30) 끝단을 순간적으로 가열함으로써, 열이 금속 열 전달을 통해 볼스터드(30)만 가열되고 볼(31) 외부의 그리스로 현저히 다른 열 전달 계수를 가지므로 오히려 냉각 효과를 발생하여 볼스터드(30)의 소실을 방지하게 된다. In the heat treatment process (S3), the high frequency heat processor 50 emits a high frequency, while the existing aging chamber is gradually heated for more than one hour because the ball joint 100 receives the heat of several hundred degrees (° C), The high-frequency conduction heating instantaneously heats the end of the ball stud 30, so that the heat is heated only through the metal heat transfer and only the ball stud 30 has a significantly different heat transfer coefficient to the grease outside the ball 31. To prevent the loss of the ball stud 30.
이의 메커니즘이 적절히 일어나기 위해서는 10사이클 미만의 교류 통전으로 5000 ~ 12000 A의 순간적인 대전류를 가진 고주파가 도 6에 도시된 바와 같이 볼스터드(30)의 나사부(32) 상단으로 약 0.8초간 방출되어 볼(31)을 팽창시키고, 팽창된 볼(31)에 의해 볼시트(20)는 확장하게 되는 것이다. 따라서 기존의 열처리 공정에서 볼조인트(100) 전체가 팽창되는 것과는 달리 볼스터드(30)만 팽창되어 열처리 효율을 증대시킬 수 있게 되는 것이다.In order for this mechanism to occur properly, a high frequency with an instantaneous high current of 5000 to 12000 A is applied for about 0.8 seconds to the upper end of the threaded portion 32 of the ball stud 30 as shown in FIG. Inflated 31, the ball seat 20 is expanded by the expanded ball 31. Therefore, in contrast to the expansion of the entire ball joint 100 in the existing heat treatment process, only the ball stud 30 is expanded to increase the heat treatment efficiency.
냉각공정(S4)에서는 상기 열처리 공정(S4)에서 가열된 볼스터드(30)를 냉각시키기 위해 자연냉각기(70)의 회전테이블에 삽입하여 소정시간동안 회전시키는데, 상기와 같은 회전을 통해 팽창된 볼(31)은 도 7에 도시된 바와 같이 원래 상태로 복원되나 볼(31)에 의해 확장된 볼시트(20)는 복원되지 않고 그대로 유지되어 볼(31)과 볼시트(20) 사이에 이격공간이 형성되는 것이다. 즉, 자연냉각시 볼시트(20)의 수축현상이 발생하지 않아 기동토크가 저하되고 그로 인하여 볼스터드(30)의 회전운동이 원활하게 되는 것이다.In the cooling step S4, the ball stud 30 heated in the heat treatment step S4 is inserted into the rotary table of the natural cooler 70 and rotated for a predetermined time, and the ball expanded through the rotation as described above. 7 is restored to its original state as shown in FIG. 7, but the ball seat 20 extended by the ball 31 is not restored but is maintained as it is, spaced apart between the ball 31 and the ball seat 20. This is to be formed. That is, the contraction phenomenon of the ball seat 20 does not occur during natural cooling, so that the starting torque is lowered, thereby smoothly rotating the ball stud 30.
커버장착공정(S5)에서는 볼삽입부(11) 내부로 이물질이 유입되는 것을 방지하기 위하여 소켓(10) 상측으로 더스트 커버(40)를 장착한다.In the cover mounting step (S5), the dust cover 40 is mounted above the socket 10 in order to prevent foreign matter from flowing into the ball insertion unit 11.
상기 냉각공정(S4)이 완료되면 인출기(80)를 통해 볼조인트(100)를 인출한다.When the cooling process (S4) is completed, the ball joint 100 is withdrawn through the extractor 80.
상기와 같은 공정을 통해 특정 차량에 성능시험한 데이타를 살펴 보면,Looking at the performance test data for a specific vehicle through the above process,
<시험1><Test 1>
①시험방법① Test method
*유격시험* Clearance test
볼스터드(30)의 축방향으로 250kgf의 하중을 가한 후, 변위량을 측정.The displacement amount was measured after applying a load of 250 kgf in the axial direction of the ball stud 30.
볼스터드(30)의 횡방향으로 500kgf의 하중을 가한 후, 변위량을 측정.The displacement amount was measured after applying a 500 kgf load in the lateral direction of the ball stud 30.
*토크시험Torque test
회수: 5cycles, 속도: 3rpm, 가동구간:1cycleFrequency: 5cycles, Speed: 3rpm, Running Range: 1cycle
②시험결과② Test Results
상기 그래프를 살펴보면 토크가 최대 10.30, 최소: 8.74, 평균: 9.59로 토크시험SPEC인 5~40kgf를 만족하고 있음을 확인할 수 있다.Looking at the graph, it can be seen that the torque satisfies the torque test SPEC, 5 to 40 kgf, with a maximum of 10.30, a minimum of 8.74, and an average of 9.59.
<시험2><Test 2>
①시험방법① Test method
*유격시험* Clearance test
볼스터드(30)의 축방향으로 250kgf의 하중을 가한 후, 변위량을 측정.The displacement amount was measured after applying a load of 250 kgf in the axial direction of the ball stud 30.
볼스터드(30)의 횡방향으로 500kgf의 하중을 가한 후, 변위량을 측정.The displacement amount was measured after applying a 500 kgf load in the lateral direction of the ball stud 30.
*토크시험Torque test
회수: 5cycles, 속도: 3rpm, 가동구간:1cycleFrequency: 5cycles, Speed: 3rpm, Running Range: 1cycle
②시험결과② Test Results
상기 그래프를 살펴보면 토크가 최대: 8.24, 최소: 6.38, 평균: 7.32로 토크시험SPEC인 5~40kgf를 만족하고 있음을 확인할 수 있다.Looking at the graph, it can be seen that the torque satisfies the torque test SPEC, 5 to 40 kgf, with the maximum: 8.24, the minimum: 6.38, and the average: 7.32.
<시험1><시험2>에서 살펴본 바와 같이 종래의 제조공정을 통해 제조된 볼조인트(100)는 볼시트(20)의 수축으로 토크가 높은되는 반면, 본 제조공정을 통해 제조된 볼조인트(100)는 볼시트(20)의 수축이 거의 없어 토크가 낮은 것을 확인할 수 있다.As described in <Test 1> <Test 2>, the ball joint 100 manufactured by the conventional manufacturing process has a high torque due to the contraction of the ball seat 20, while the ball joint manufactured by the present manufacturing process ( 100 has little contraction of the ball seat 20, it can be confirmed that the torque is low.
이상에서 살펴본 바와 같이 본 발명은 0.8초간의 고주파 방출로 볼(31)은 팽창시키고, 볼시트(20)는 확장시킴으로써, 토크가 저하되어 볼스터드(30)의 회전운동을 원활히 수행할 수 있고, 열처리 시간이 대폭 단축되고 열처리 후 소요되는 자연냉각시간도 단축되어 전체 생산공정이 효율적으로 진행될 뿐만 아니라, 기존의 에이징 챔버를 이용한 열처리시 보다 내마모성과 피로강도를 개선할 수 있게 된다.As described above, in the present invention, the ball 31 is expanded by the high frequency emission for 0.8 seconds, and the ball seat 20 is expanded, thereby lowering torque, thereby smoothly performing the rotational movement of the ball stud 30, The heat treatment time is greatly shortened, and the natural cooling time required after heat treatment is also shortened, and the entire production process is efficiently carried out, and the wear resistance and fatigue strength can be improved more than the heat treatment using the existing aging chamber.
또한 고주파 열처리는 출력 및 가열시간의 정확한 조정이 가능하므로 균일한 제품의 다량생산에 적합하고, 가열시간이 초단위이므로 Scale 발생이 거의 없으며, 가스 발생이나 연기의 발생이 없어 작업환경이 개선되고, 예열시간이 필요없어 즉각적인 작업이 가능하며, 취급이 극히 간단하여 열처리 공정 편입이 용이하다. In addition, high frequency heat treatment is possible to precisely adjust the output and heating time, so it is suitable for mass production of uniform products. Since the heating time is in seconds, there is almost no scale generation, and there is no gas generation or smoke generation. No preheating time is required, so immediate work is possible, and handling is extremely simple, making it easy to incorporate heat treatment processes.
이와같이 된 본 발명은 볼조인트의 열처리시 기존의 에이징 챔버를 사용하지 않고 고주파열처리기를 사용하여 볼스터드의 나사부 상단으로 고주파를 방출시킴으로써, 열처리하는데 소요되는 시간과 인력을 최소화하여 생산원가를 절감시킬 수 있고, 연속적인 공정이 가능하여 작업효율을 증대시킬 수 있으며, 볼시트의 수축이 거의 발생되지 않아 기동토크를 저하시킬 수 있는데 그 효과가 있다.The present invention thus achieved by using a high-frequency heat treatment machine to emit a high frequency to the upper end of the threaded portion of the ball studs without using the existing aging chamber during the heat treatment of the ball joint, to minimize the time and manpower required for heat treatment to reduce the production cost And, it is possible to increase the work efficiency because the continuous process is possible, there is little effect of shrinkage of the ball seat can reduce the starting torque has the effect.
도 1은 종래의 공정을 도시한 상태도1 is a state diagram showing a conventional process
도 2는 본 발명의 전체 공정을 도시한 블록도2 is a block diagram showing the overall process of the present invention.
도 3은 본 발명의 전체 공정을 도시한 상태도Figure 3 is a state diagram showing the overall process of the present invention
도 4는 본 발명의 볼시트 삽입공정을 도시한 상태도Figure 4 is a state diagram showing the ball seat insertion process of the present invention
도 5는 본 발명의 압입공정을 도시한 상태도Figure 5 is a state diagram showing the indentation process of the present invention
도 6는 본 발명의 고주파 열처리상태를 도시한 상태도6 is a state diagram showing a high frequency heat treatment state of the present invention
도 7은 본 발명의 볼 복원상태를 도시한 상태도7 is a state diagram showing a ball restoration state of the present invention
도 8은 본 발명의 열처리 및 자연냉각상태를 도시한 상태도8 is a state diagram showing the heat treatment and natural cooling state of the present invention
< 도면의 주요부분에 대한 부호의 설명 ><Description of Symbols for Major Parts of Drawings>
10: 소켓 11: 볼삽입부 12: 돌기10: socket 11: ball insert 12: protrusion
20: 볼시트 30: 볼스터드 31: 볼20: ball seat 30: ball stud 31: ball
32: 나사부 40: 더스트 커버 50: 고주파열처리기32: thread 40: dust cover 50: high frequency heat treatment
S1: 삽입공정 S2: 압입공정 S3: 열처리공정S1: Insertion Process S2: Indentation Process S3: Heat Treatment Process
S4: 냉각공정 S5: 커버장착공정S4: Cooling process S5: Cover mounting process
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2003-0085904A KR100538064B1 (en) | 2003-11-29 | 2003-11-29 | A manufacturing process of ball joint for car utilizing high frequency |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2003-0085904A KR100538064B1 (en) | 2003-11-29 | 2003-11-29 | A manufacturing process of ball joint for car utilizing high frequency |
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| KR20030096192A KR20030096192A (en) | 2003-12-24 |
| KR100538064B1 true KR100538064B1 (en) | 2005-12-20 |
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| DE102013221964B3 (en) * | 2013-10-29 | 2015-03-12 | Zf Friedrichshafen Ag | Method and device for producing a ball joint |
| CN109093389B (en) * | 2018-10-30 | 2020-07-24 | 浙江创诺汽车零部件有限公司 | Automatic production method and equipment for joint bearing |
| CN109372895B (en) * | 2018-10-30 | 2021-01-26 | 胡陈和 | Automatic production equipment for joint bearing and assembling mechanism for ball socket and ball head |
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