KR20100126019A - Processing system of bearing cap - Google Patents

Processing system of bearing cap Download PDF

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Publication number
KR20100126019A
KR20100126019A KR1020090045045A KR20090045045A KR20100126019A KR 20100126019 A KR20100126019 A KR 20100126019A KR 1020090045045 A KR1020090045045 A KR 1020090045045A KR 20090045045 A KR20090045045 A KR 20090045045A KR 20100126019 A KR20100126019 A KR 20100126019A
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KR
South Korea
Prior art keywords
bearing cap
unit
processing
moving
fixing
Prior art date
Application number
KR1020090045045A
Other languages
Korean (ko)
Other versions
KR101078017B1 (en
Inventor
김광노
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(주) 세양
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Publication date
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Priority to KR1020090045045A priority Critical patent/KR101078017B1/en
Publication of KR20100126019A publication Critical patent/KR20100126019A/en
Application granted granted Critical
Publication of KR101078017B1 publication Critical patent/KR101078017B1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/003Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P23/00Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
    • B23P23/02Machine tools for performing different machining operations

Abstract

PURPOSE: A bearing cap processing system, capable of facilitating assembly and disassembly of a bearing cap using a nut runner, is provided to improve productivity by automatically and semi-automatically processing a bearing cap in one line. CONSTITUTION: A bearing cap processing system comprises a stoker(1), a conveying unit(2), an oil hole unit(3), a bolt hole unit(4), a metal hole unit(5) and a control unit(10). The stoker stores a plurality of bearing caps. The conveying unit transfers the bearing cap loaded in the stoker. A oil hole fixing unit forms an oil hole by passing through the sidewall of the bearing cap fixed with a fixing member. The bolt hole unit forms a screw hole through the sidewall of the bearing cap fixed with the fixing member. The metal hole unit forms a metal hole on the surface of the bearing cap. The control unit controls each unit.

Description

Processing cap of bearing cap

The present invention relates to a bearing cap machining system, and more particularly, to a bearing cap machining system that enables a more stable operation.

In particular, the bearing cap processing system which can move the bearing cap being processed automatically according to the desired work using the transfer means, and control each work machine by a program set in the control unit to perform more accurate work will be.

The engine has a crankshaft, and a bearing cap is used as a means for rotatably installing such a crankshaft to a cylinder block.

Such a bearing cap is a means for supporting a bearing installed therein so that the crankshaft can be easily rotated, but may be slightly different depending on a structure of a bearing or an engine, but as shown in FIGS. 16 and 17. Consists of.

As shown, the bearing cap is configured by connecting the semi-circular first cap 100 and the second cap 200 with the fixing bolt 300, the first cap 100 is fixed to the engine block.

As illustrated, the bearing cap is formed with oil grooves 110 and 210 through which oil flows on the inner circumferential surface thereof, and at least one oil hole 130 for supplying oil to the oil grooves 110 and 210 formed as sidewalls is shown in FIG. It is formed to pass through the oil groove 110, the first cap is formed with a screw hole 140 for connecting to the engine block.

Reference numeral 150 is a side groove.

In addition, the metal grooves 120 and 220 to which the locking projections formed on the outer circumferential surface of the bearing (not shown) installed on the inner surface are fitted.

The bearing cap configured as described above is assembled by fixing the first cap to the engine body as shown in FIG. 17 and then fitting the shaft and fixing the second cap to the fixing bolt 300.

The manufacturing process of the bearing cap thus constructed is typically formed by casting the semi-circular first cap and the second cap, respectively, and then preprocessing by roughing the enlarged surface, as shown in FIG. 18, the first cap and the second cap. Oil groove, O-ring hole, screw hole, metal groove, etc. are formed through various processes in the assembled state by the fixing bolt.

The bearing cap configured as described above is made in an integrated state by fixing the first cap and the second cap with fixing bolts in a state in which oil grooves 110 and 210 are formed on the inner circumferential surface as shown in FIG. 18 by pretreating the bearing cap casting. This is because the process of forming the shaft hole in the state in which the first and second caps are coupled to each other is performed so that the shaft hole may be formed in a round shape.

As the fixing bolts are tightened so that the two caps are in close contact with each other in the pretreatment process such as forming a shaft hole, the metal caps can be formed on the inner circumferential surface of the inner circumferential surface by separating the two caps by loosening the tightened bolts. Since the process of detaching or assembling is done manually, not only it takes a lot of power, but it is also cumbersome and takes a lot of time.

In addition, the conventional bearing cap manufacturing process is mostly done manually.

In other words, the oil hole or screw hole is formed by biting the bearing cap in a vise and moving the drill up and down, and in the case of the inner metal groove, the bearing cap placed horizontally is fixed by the fixing means and then rotated. It is shape | molded by the method of cutting an inner surface using a tool.

The process of forming oil holes, screw holes, metal grooves, etc. by such a manual method takes not only a lot of time and effort, but also injuries of workers by work tools, which causes a decrease in productivity.

In addition, there is a disadvantage in that the failure rate is not easy to adjust the position of the manual tool.

The present invention has been developed to solve the problems of the prior art as described above, can be easily loosened or tightened fixing bolts fixing the first and second caps, the first cap and the first It is an object of the present invention to provide a bearing cap machining system that allows two caps to be easily separated.

In addition, the process of forming oil holes, screw holes, and metal grooves can be performed automatically or semi-automatically on a line, so that faster work can be performed, thereby increasing productivity and accurately setting the positions of processing devices. It is an object of the present invention to provide a bearing cap processing system capable of forming more accurate oil holes, screw holes, and metal grooves.

Such a bearing cap processing system of the present invention is a system for processing a bearing cap by processing a bearing cap casting made by combining the first and second caps made of casting by a mold with a fixed bolt, by loading a plurality of bearing caps A stocker to store; A transfer unit for transferring a bearing cap loaded on the stocker; An oil hole unit which is transported by the transfer unit and penetrates the side wall of the bearing cap fixed by the fixing unit to form an oil hole; A bolt hole unit which is moved by the transfer unit and penetrates the side wall of the bearing cap fixed by the fixing means to form a screw hole; A metal groove unit forming a metal groove on an inner surface of the bearing cap; It characterized in that it comprises a control unit for controlling each unit.

The present invention has an effect that can easily disassemble and assemble the bearing cap by installing a nut runner which is a means for loosening or tightening the fixing bolt for fixing the two caps constituting the bearing cap.

In addition, it is possible to increase productivity by installing oil hole, screw hole, metal groove forming equipment on one line, and automatically or semi-automatically processing the bearing cap moving through the transfer means in one line. It has an effect.

Moreover, since the positions of the processing devices or bearing caps can be precisely adjusted, more accurate bearing caps can be manufactured, thereby reducing the defect rate.

Hereinafter, a ring cap processing system according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing an example of a bearing cap processing system according to the present invention, Figure 2 is a plan view showing an example of a bearing cap processing system according to the present invention, Figure 3 is a plan view of a stocker constituting the present invention 4 is a side view of a stocker constituting the present invention, FIG. 5 is a plan view of an oil hole unit constituting the present invention, FIG. 6 is a front view of a face chamfer constituting the present invention, and FIG. 8 is a plan view of the bolt hole unit constituting the present invention, Figure 9 is a front view of the metal groove unit constituting the present invention, Figure 10 is a view of the metal groove unit constituting the present invention It is a side view, FIG. 11 is a top view of the metal groove unit which comprises this invention, FIG. 12 is a front view of the nut runner which comprises a metal groove unit, FIG. 13 is a side view of the nut runner which comprises a metal groove unit, FIG. Metal groove It is a front view of the cutting machine which comprises a unit, and FIG. 15 is a top view of the cutting machine which comprises a metal groove unit.

As shown, the bearing cap processing system of the present invention processes the bearing cap casting made by combining the first and second caps 100 and 200, which are cast into the casting by the mold, with the fixing bolt 300, thereby bearing the bearing cap. A system for processing, comprising: a stocker (1) for loading and storing a plurality of bearing caps; A transfer unit 2 for transferring a bearing cap loaded on the stocker 1; An oil hole unit 3 which is transported by the transfer unit 2 and penetrates the side wall of the bearing cap fixed by the fixing means 30 to form an oil hole 130; A bolt hole unit 4 which is transferred by the transfer unit 2 and penetrates the side wall of the bearing cap fixed by the fixing means 40 to form a screw hole 130; A metal groove unit 5 forming metal grooves 120 and 220 on the surface of the bearing cap; It is configured to include a control unit 10 for controlling each unit.

The bearing cap processed by the bearing cap processing system of the present invention is used as a means for supporting the crankshaft of the engine as described in the prior art pre-treat the casting of the first cap 100 and the second cap 200 18 is provided to the system of the present invention in a processed state as shown in FIG.

The bearing cap thus provided is stored in a state in which it is loaded on the stocker 1 as shown in FIG. 1.

The stocker 1 is installed in the front and rear ends of the bearing cap processing system of the present invention as shown in Figures 1 and 2 as a means for storing the bearing cap as shown in Figures 3 and 4 Likewise, a plurality of supports 11b are installed on the rotating plate 11.

The rotating plate 11 is rotated horizontally by the drive of the motor (11a), and the support (11b) is installed in a circumferential direction along the edge of the rotating plate 11 in a pair of three to match the shape of the bearing cap It is.

As shown in the figure, the edge of the rotating plate 11 is supported by the roller 11c to prevent the rotating plate from being inclined or deformed by the weight of the bearing cap stacked in multiple layers.

On one side of the rotating plate 11 constituting the stocker 1 is provided with a lifting means 12 for lifting and supplying the bearing caps stacked on the stocker 1 to the transfer unit 2.

The transfer unit 2 is a gantry rod equipped with an air finger for gripping a bearing cap, such a device may be configured by selecting one of those used a lot in a production line and a detailed description thereof will be omitted.

However, if briefly explained in order to help the understanding of the present invention, the air finger moving along the guide rail is installed, the air finger is composed of the formation of the forceps to be operated by pneumatic to hold the outer peripheral surface of the bearing cap or inserted into the inner surface The bearing cap is gripped in the state.

As such, the air finger holding the bearing cap is installed at a height higher than the height of other devices so that the bearing cap can be easily transported. Thus, the air finger installed at this height can hold the bearing cap as shown in FIG. The lifting means 12 is installed as a means for raising and lowering the bearing cap.

3 and 4, the elevating means 12 and the elevating plate 121 is installed to be moved up and down along the LM guide 121a; A cap moving plate 122 installed to be horizontally moved to the elevating plate 121; It consists of a ball screw 123 to rotate by the drive of the motor 123a to move the support 121 up and down.

The cap moving plate 122 is a means for raising the bottom of the bearing cap substantially to be able to enter and exit the bottom of the bearing cap. Therefore, the cap moving plate 122 is to be installed to move horizontally, and thus moving means 122a for moving the cap moving plate 122 is installed, this moving means 122a is an infant, or a pneumatic cylinder Can be used.

In addition, in order to allow the cap moving plate 122 to enter and exit the bottom of the bearing cap, the bottom of the bearing cap should be supported such that the bearing cap stacked on the bottom end is spaced apart from the upper surface of the rotating plate 11. Means for supporting (not described) are installed on the rotating plate 11, so that the cap moving plate 122 is not shown in FIG. 3 so that the means for supporting the bearing cap bottom surface is not caught by the cap moving plate 122. As shown, the groove is formed in the portion facing the center of the rotating plate.

As shown in FIG. 4, the cap moving plate 122 fits into the bottom surface of the bearing caps stacked at the bottom of the plurality of stacked bearing caps and pushes up all the bearing caps stacked thereon.

The ball screw 123 is provided as a means for raising and lowering the wobble plate 122.

The ball screw 123 is a conventional ball screw to rotate the screw shaft by the motor 123a, the screw nut is raised and lowered, the lifting plate 121 is fixed to the screw nut.

As the elevating plate 121 is elevated, the cap moving plate 122 is lifted, and the LM guide 121a is a means for allowing the elevating plate 121 to be moved up and down without being shaken. It is installed.

The bearing cap moved by the transfer unit 2 is formed through the oil hole unit 3, the bolt hole unit 4, the metal groove unit 5 in order to form an oil hole, a screw hole, a metal groove.

One or more oil hole units 3 may be installed as a means for forming an oil hole through the side wall of the bearing cap as shown in FIGS. 16 to 18.

The oil hole unit 3 is composed of a drill 31 installed to be movable by the moving means 311.

As shown in FIG. 5, the oil hole unit 3 forms an oil hole on the side wall of the bearing cap fixed by the fixing means 30, and thus the oil hole unit 3 horizontally on the side wall of the bearing cap fixed in a horizontal state. It is installed to be movable horizontally to form a, the moving means 311 is installed to be able to move in this way horizontally.

The moving means 311 may be a ball screw or LM guide as described above.

The rear surface of the oil hole unit 3 is installed so as to be moved back and forth and up and down by the moving means (321, 322) is a face grinder 32 for forming a side groove 150 on the side of the bearing cap is further Is installed.

The face grinder 32 is a means for forming the side groove 150 on one side of the bearing cage as shown in Figure 16 is configured by installing a keting blade on the rotating shaft of the power transmission means such a cutter has already been developed It can be used to choose one.

The moving means 321, 322 may also be used, such as a ball screw or LM guide or hydraulic, pneumatic cylinder.

The bearing cap having the oil hole formed by the oil hole unit 3 is moved to the bolt hole unit 4 by the transfer unit 2.

The bolt hole unit 4 is a drill (41) installed to be movable back and forth and left and right by moving means (411, 412); Installed on one side of the drill 41 is composed of a tab molding machine 42 to form a screw thread on the inner surface of the hole formed by the drill.

The bolt hole formed by the bolt hole unit 4 is composed of a drill 41 for forming a hole into a threaded hole in which the bolt is tightened and a tap molding machine 42 for forming a thread. As shown in FIG. 8, the moving plate is installed on the moving plate which is moved by the moving means 412 for horizontally moving left and right, and each is supported by the moving means 411 which can move back and forth.

The metal groove unit 5 includes a cutting machine 51 moving back and forth, left and right, and up and down by moving means 511, 512 and 513; Fixing means 52 is installed in front of the cutting machine 51 to be moved to the left and right by a moving means 521 and the bearing cap is fixedly supported on the upper portion; Nutrunner is installed on one side of the fixing means 52 to be moved back and forth, left and right by the moving means (531, 532) to loosen or tighten the fixing bolt of the bearing cap supported by the fixing means 52 ( 53).

The metal groove unit 5 is a means for forming the metal grooves 120 and 220 shown in FIG. 16 to form the metal grooves 120 and 220 in each of the first cap 100 and the second cap 200. In order to loosen the fixing bolt 300 to separate the first cap and the second cap.

The nutrunner 53 is provided as a means for loosening or tightening the fixing bolt 300.

The nutrunner 53 is one of the electric or pneumatic tools that loosens or tightens the bolts, which are moved by the moving means 531, 532 so as to be able to move towards the bearing caps fixed to the fixing means 52. Supported.

The first and second caps of which the fixing bolts are loosened by the nutrunner 53 are fixed by the fixing means 52 in a state in which they are separated from each other, and the caps thus fixed are formed with a metal groove by the cutting machine 51. .

The cutting machine 51 is composed of a cutting blade that rotates by an electric or hydraulic device, etc. It can be configured by adopting a conventional one.

In front of the fixing means 52 is further provided with an auxiliary support means 54 for supporting a side of the bearing cap supported by the fixing means 52 to the side, the auxiliary support means 54 to the LM guide It consists of a support plate installed so that a movement back and forth is possible.

The control unit 10 is provided as a means for controlling each unit configured as described above, which controls the electric, hydraulic, pneumatic as a means for controlling the driving of each unit described above.

 Although not described in detail with respect to the moving means above, they can all be composed of an LM guide, which is a means for guiding the movement to be stably maintained, and an oil, pneumatic device or ball screw for actually moving the moving part of each unit.

1 is a front view showing an example of a bearing cap processing system according to the present invention,

2 is a plan view showing an example of a bearing cap processing system according to the present invention,

3 is a plan view of a stocker constituting the present invention,

4 is a side view of the stocker constituting the present invention,

5 is a plan view of the oil hole unit constituting the present invention,

6 is a front view of a face grinder constituting the present invention,

7 is a front view of the bolt hole unit constituting the present invention,

8 is a plan view of the bolt hole unit constituting the present invention,

9 is a front view of the metal groove unit constituting the present invention,

10 is a side view of the metal groove unit constituting the present invention,

11 is a plan view of a metal groove unit constituting the present invention,

12 is a front view of the nutrunner constituting the metal groove unit,

13 is a side view of the nutrunner constituting the metal groove unit,

14 is a front view of a cutting machine constituting a metal groove unit,

15 is a plan view of a cutting machine constituting a metal groove unit.

<Description of the symbols for the main parts of the drawings>

1: stalker

  11: rotating plate 11a: motor 11b: support

  12: lifting means

   121: support 121a: LM guide

   122: cap moving plate

   123: ball screw 123a: motor

2: transfer unit

3: oil hole unit

  31: drill 311: moving means

  32: face grinder

4: Bolt hole unit

  41: drill 411: moving means

  42: tap molding machine

5: metal groove unit

  51: cutting machine 511, 512, 513: moving means

  52: fixing means

  53: nutrunners 531, 532: means of transportation

  54: auxiliary support means

10: control unit

Claims (10)

  1. In the system for processing the bearing cap by processing the bearing cap casting made by combining the first and second caps (100, 200) made of a casting by a fixed bolt 300,
    A stocker (1) for loading and storing a plurality of bearing caps;
    A transfer unit 2 for transferring a bearing cap loaded on the stocker 1;
    An oil hole unit 3 which is transported by the transfer unit 2 and penetrates the side wall of the bearing cap fixed by the fixing means 30 to form an oil hole 130;
    A bolt hole unit 4 which is transferred by the transfer unit 2 and penetrates the side wall of the bearing cap fixed by the fixing means 40 to form a screw hole 130;
    A metal groove unit 5 forming metal grooves 120 and 220 on the surface of the bearing cap;
    Bearing cap processing system characterized in that it comprises a control unit 10 for controlling each unit.
  2. The method of claim 1,
    The rear surface of the oil hole unit 3 is installed so as to be moved back and forth and up and down by the moving means (321, 322) is a face grinder 32 for forming a side groove 150 on the side of the bearing cap is further Bearing cap processing system, characterized in that installed.
  3. The method according to claim 1 or 2,
    The stocker (1) is a bearing cap processing system, characterized in that configured to be supported so that the bearing caps stacked by installing a plurality of support (11b) on the rotating plate (11) rotated by the drive of the motor (11a).
  4. The method of claim 3, wherein
    One side of the stocker (1) bearing cap processing system, characterized in that the elevating means (12) for lifting and supplying the bearing caps stacked on the stocker (1) to the transfer unit.
  5. The method of claim 4, wherein
    The elevating means 12 is an elevating plate 121 installed to be able to move up and down along the LM guide 121a;
    A cap moving plate 122 installed to be horizontally moved to the elevating plate 121;
    Bearing cap processing system, characterized in that consisting of a ball screw 123 to rotate by the drive of the motor (123a) to move the support (121) up and down.
  6. The method of claim 5,
    The transfer unit (2) is a bearing cap processing system, characterized in that the gantry rod installed air finger for holding the bearing cap.
  7. The method of claim 5,
    The oil hole unit (3) is a bearing cap processing system, characterized in that consisting of a drill (31) installed to be movable by the moving means (311).
  8. The method of claim 5,
    The bolt hole unit 4 is a drill (41) installed to be movable back and forth and left and right by moving means (411, 412);
    Bearing cap processing system, characterized in that consisting of a tab molding machine (42) installed on one side of the drill (41) to form a thread on the inner surface of the hole formed by the drill.
  9. The method of claim 5,
    The metal groove unit 5 includes a cutting machine 51 moving back and forth, left and right, and up and down by moving means 511, 512 and 513;
    Fixing means 52 is installed in front of the cutting machine 51 to be moved to the left and right by a moving means 521 and the bearing cap is fixedly supported on the upper portion;
    Nutrunner is installed on one side of the fixing means 52 to be moved back and forth, left and right by the moving means (531, 532) to loosen or tighten the fixing bolt of the bearing cap supported by the fixing means 52 ( 53) bearing cap processing system comprising a.
  10. The method of claim 9,
    In front of the fixing means 52 is further provided with an auxiliary support means 54 for supporting one side of the bearing cap supported by the fixing means 52 to the side,
    The auxiliary support means 54 is a bearing cap processing system, characterized in that the support plate is installed to be movable back and forth by the moving means.
KR1020090045045A 2009-05-22 2009-05-22 processing system of bearing cap KR101078017B1 (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
KR1020090045045A KR101078017B1 (en) 2009-05-22 2009-05-22 processing system of bearing cap

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KR20100126019A true KR20100126019A (en) 2010-12-01
KR101078017B1 KR101078017B1 (en) 2011-10-28

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102069381A (en) * 2011-01-04 2011-05-25 深圳市泽宇自动化设备有限公司 Manufacturing equipment of lock core for lock
KR101444815B1 (en) * 2013-05-01 2014-11-03 주식회사 성남전자 Apparatus for machining material automatically
CN104368979A (en) * 2014-11-19 2015-02-25 江苏华鹏智能电气股份有限公司 Method for producing bus duct sectional materials
CN104942548A (en) * 2015-07-01 2015-09-30 浙江畅尔智能装备股份有限公司 Automatic production technology and production line for tile covers
CN107081446A (en) * 2017-05-27 2017-08-22 扬州大学 A kind of oil Pump rotor class Workpiece boring special for automatic production line
CN107175367A (en) * 2017-05-11 2017-09-19 潘州州 Full-automatic lock core burr remover
CN107253062A (en) * 2017-07-21 2017-10-17 任红叶 A kind of caliper shell digital control processing production line
CN109396861A (en) * 2018-01-03 2019-03-01 湖北航特科技有限责任公司 A kind of caliper shell numerical control processing production line
KR101991873B1 (en) * 2019-03-04 2019-06-21 정동한 Manufacturing apparatus and method for bearing cap
WO2019240440A1 (en) * 2018-06-14 2019-12-19 진양비지엠텍 Assembly apparatus for check valve of grouting steel pipe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005017925B3 (en) 2005-04-18 2006-07-27 Borowski Und Meier Gmbh Crank shaft housing cover for combustion engine, formed through cold massive forming, has arch-shaped middle part extending between two side parts and positioning eye to incorporate shaft

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102069381A (en) * 2011-01-04 2011-05-25 深圳市泽宇自动化设备有限公司 Manufacturing equipment of lock core for lock
KR101444815B1 (en) * 2013-05-01 2014-11-03 주식회사 성남전자 Apparatus for machining material automatically
CN104368979A (en) * 2014-11-19 2015-02-25 江苏华鹏智能电气股份有限公司 Method for producing bus duct sectional materials
CN104368979B (en) * 2014-11-19 2017-01-11 江苏华鹏母线股份有限公司 Method for producing bus duct sectional materials
CN104942548A (en) * 2015-07-01 2015-09-30 浙江畅尔智能装备股份有限公司 Automatic production technology and production line for tile covers
CN107175367A (en) * 2017-05-11 2017-09-19 潘州州 Full-automatic lock core burr remover
CN107081446A (en) * 2017-05-27 2017-08-22 扬州大学 A kind of oil Pump rotor class Workpiece boring special for automatic production line
CN107081446B (en) * 2017-05-27 2019-05-07 扬州大学 A kind of oil Pump rotor class Workpiece boring special for automatic production line
CN107253062A (en) * 2017-07-21 2017-10-17 任红叶 A kind of caliper shell digital control processing production line
CN109396861A (en) * 2018-01-03 2019-03-01 湖北航特科技有限责任公司 A kind of caliper shell numerical control processing production line
WO2019240440A1 (en) * 2018-06-14 2019-12-19 진양비지엠텍 Assembly apparatus for check valve of grouting steel pipe
KR101991873B1 (en) * 2019-03-04 2019-06-21 정동한 Manufacturing apparatus and method for bearing cap

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