KR20150127786A - A machining center prepared with tool changer and safety apparatus - Google Patents

A machining center prepared with tool changer and safety apparatus Download PDF

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Publication number
KR20150127786A
KR20150127786A KR1020120029745A KR20120029745A KR20150127786A KR 20150127786 A KR20150127786 A KR 20150127786A KR 1020120029745 A KR1020120029745 A KR 1020120029745A KR 20120029745 A KR20120029745 A KR 20120029745A KR 20150127786 A KR20150127786 A KR 20150127786A
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KR
South Korea
Prior art keywords
tool
unclamping
changing means
unit
machining center
Prior art date
Application number
KR1020120029745A
Other languages
Korean (ko)
Inventor
김명진
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김명진
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김명진 filed Critical 김명진
Priority to KR1020120029745A priority Critical patent/KR20150127786A/en
Publication of KR20150127786A publication Critical patent/KR20150127786A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
    • B23Q11/0092—Safety devices protecting the operator, e.g. against accident or noise actuating braking or stopping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/006—Arrangements for observing, indicating or measuring on machine tools for indicating the presence of a work or tool in its holder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
    • B23Q3/1552—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling parts of devices for automatically inserting or removing tools
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)

Abstract

The present invention relates to a machining center having a tool replacement unit and a safety device. The machining center is formed of a structure of intermittently connecting a tool unclamp unit to a driving source of a tool replacement unit. When the tool replacement unit is finished in a state where a tool to process workpieces for replacement is unclamped on an arm, a limit switch for tool unclamp is operated to generate an alarm while stopping operation of an automatic tool replacement device, thus preventing damages to a cam due to an uncertainty of a mechanical operation while the tool operates in an unclamped state. A driving shaft is installed to partially be exposed from one side of the tool replacement unit; a first coupling unit is formed on an exposed end of the driving shaft; a second coupling unit coupled to the first coupling unit to be interlocked is installed in the tool unclamp unit corresponding to the first coupling unit; and a gear part is installed inside the tool unclamp unit to be interlocked with the second coupling unit. A cam gear is installed in one side of a gear part to be engaged to each other, and the tool replacement unit and a safety device having a link member arranged on a center to be rotated on a hinge part are arranged to unclamp while performing a seesaw motion in accordance to a rotational motion of the cam gear.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a machining center having a tool changing means and a safety device,

The present invention relates to a machining center having a tool changing means and a safety device, and more particularly, to a machining center having a tool changing means and a safety device, and more particularly to a structure in which a tool unclamping means is intermittently connected only to a drive source of a tool changing means, If the tool is not clamped to the arm and the tool changeover is completed, the limit switch for the tool-on-ramp is activated to generate an alarm and at the same time the automatic tool changer is stopped so that the tool is not clamped To a machining center equipped with a tool changing means and a safety device which can prevent the cam from being damaged due to uncertainty of the mechanical operation when operating in a state where the cam is in operation.

In general, a machining center which is generally used is composed of a combination of various parts and various means for performing the functions. In particular, a machining center is provided with a tool changing means and a tool unclamping means, And the driving source of the tool unclamping means have a dual structure.

In the tool changer described above, generally, a roller gear, a cam, a turret, a motor, a swing arm, and a swing arm are provided inside an ATC box. ) And the tool unclamping means, if viewed in general,

And a hydraulic or pneumatic device, a cylinder, a piston, and a draw bar are built in.

Further, the tool changing means uses a motor as a main driving source, and the unclamping means is operated by a dual-purpose driving source using pneumatic or hydraulic pressure as a driving source. In addition, the tool changing means or the tool unclamping means are well known means which are essential to a normal machining center.

In the following, a conventional general cylinder connection driving method and a link connection driving method in which a driving source of the tool changing means is used to drive the tool unclamping will be briefly described.

The cylinder connection drive system is constituted of a closed circuit by connecting a hydraulic cylinder to a drive shaft of an ATC cam of a tool change means and connecting an output line of the cylinder to a cylinder of a tool unclamp.

When the tool unclamping operation is required, the hydraulic pressure is transmitted from the hydraulic cylinder connected to the drive shaft of the ATC cam to the cylinder of the tool unclamp, and the drawbar provided in the tool unclamping means is lowered to unclamp the tool .

The link connection driving method is the same as that in which the tool unclamping is driven by using the above-described ATC motion driving source. However, unlike the cylinder connecting method, Member is used to implement an operation of unclamping through movement of another link member connected between the cam drive shaft and the spindle drawbar at a required point in time.

However, the structure in which the tool changing means and the driving source of the tool unclamping means are completely separated from each other and is two-dimensionally formed is a structure for driving the swing arm using a motor and unclamping the spindle tool by using hydraulic pressure or pneumatic pressure. When the arm rotates and grips the tool, the signal is sensed and the cylinder and the piston are operated by hydraulic or pneumatic pressure to unclamp the tool. At this time, the drive source of the swing arm and the tool unclamping drive source are dualized, Although there are simple advantages,

It is difficult to electrically and mechanically align the mutual sequence with respect to the circle precisely and there is a problem that a sufficient safety time is ensured due to the occurrence of malfunction or the like and the tool change time is unnecessarily delayed.

In addition, although the cylinder connecting drive system used to partially solve the above problems has the advantage that the drive source is unified into one as described above, it is difficult to accurately determine the volume ratio of the two hydraulic cylinders, , There arises a problem that the stroke of the cylinder is changed and the tool unclamping is not accurately performed. In addition, when air flows into the cylinder, the responsiveness of the compressible fluid is deteriorated due to the nature of the compressible fluid, which results in a longer unclamping time.

However, since the ATC cam and the drawbar are mechanically connected to each other, the tool changing means and the tool unclamping means are integrally mounted with each other. Therefore, it can be applied to a small machining center. However, in a large machining center, there is a structural problem that is difficult to apply due to a burden of the transfer weight.

In the prior art, there is no tool limit switch for unclamping the tool to confirm that the tool is not clamped when the tool is not clamped to the arm. Damage of the cam due to uncertainty of the mechanical operation when the tool is not clamped And the maintenance and maintenance cost due to replacement of the automatic tool changer is excessively increased.

[Related Technical Literature]

1. Automatic tool changer for large machine tools (Patent Application No. 10-2011-0043863)

2. Control method of large tool interference prevention of automatic tool changer for machine tool (Patent Application No. 10-2002-0024080)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a clamping device for clamping a tool for clamping a workpiece, , The limit switch for the tool over lamp is activated to generate the alarm and at the same time the operation of the automatic tool changer is stopped so that the operation of the tool when the tool is not clamped And to provide a machining center provided with a tool changing means and a safety device that can prevent the cam from being damaged due to uncertainty.

Further, the drive source is mechanically connected to the drive source while unifying the drive sources, so that the advantage of unifying the drive source is exhibited as it is, and the drive source of the tool change means is intermittently connected only when the tool unclamping means is required, This is to provide a machining center equipped with a tool changer and a safety device that can be applied to a large machining center while eliminating all the environmental pollution, cost increase, and inaccurate implementation operations that have been raised.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a machining center provided with a tool changing means and a safety device according to an embodiment of the present invention is provided with a drive shaft partially exposed from one side of the tool changing means, Wherein the tool unclamping means corresponding to the first engaging means is provided with a second engaging means for engaging with and engaging with the first engaging means, And a cam gear is provided on one side of the gear unit so as to be interlocked and interlocked with each other so as to rotate about the hinge unit at the center so as to perform an unclamping operation while performing a seesaw motion according to the rotation operation of the cam gear And the cam gear is connected to a disk, and the disk is engaged with the disk, As the a locking member engaging portion formed at one side to control the operation rotatably to the center hinge portion located at the center of the other side and being configured so as to be exposed so as to be locked is released by an external pressure.

According to another aspect of the present invention, there is provided a machining center including a tool changing unit and a safety device, wherein the first and second coupling members are engaged with each other to process the first coupling member into a key shape when driving force is transmitted, And the engagement hole is formed in a shape of a key groove.

The machining center provided with the tool changing means and the safety device according to another embodiment of the present invention includes an air booster for increasing the hydraulic pressure generated by the command of the program inputted to the automatic tool changer, A solenoid valve for opening and closing the oil to be transferred to the cylinder for tool clamp / tool unclamping, and a tool clamp / tool unclamp for performing upward / downward linear movement by the hydraulic pressure of the oil passing through the solenoid valve And a limit switch for unclamping the tool for checking whether the tool is clamped during the upward and downward movements of the arm, the automatic tool change safety device comprising: an arm for clamping a tool for interlocking with a cylinder for machining a workpiece; When the tool for machining the workpiece is not clamped to the arm, an alarm is generated and the automatic And a limit switch for a tool unclamping for stopping the operation of the tool changing device is provided.

The machining center provided with the tool changing means and the safety device according to the embodiment of the present invention is structured so as to be mechanically connected only when the tool unclamping means is required to the drive source of the tool changing means, Is used to prevent environmental pollution, thereby reducing the cost.

Further, the machining center provided with the tool changing means and the safety device according to the embodiment of the present invention can unify the drive source in the commonly used linking method, but the tool unclamping means, the tool changing means, The effect of minimizing the burden to be conveyed can be expected.

Further, in the machining center provided with the tool changing means and the safety device according to the embodiment of the present invention, when the automatic tool changing is completed in a state in which the tool for machining the workpiece is not clamped during the automatic tool changing, The switch is activated to generate an alarm and at the same time to stop the operation of the automatic tool changer so as to ensure the reliability by the uncertain operation of the automatic tool changer which processes the workpiece without the tool being clamped to the arm, So that additional replacement of the tool is not required and the maintenance and maintenance cost can be reduced.

Further, the machining center provided with the tool changing means and the safety device according to the embodiment of the present invention includes the tool changing means and the safety device in one machining center, so that the driving source is mechanically connected to the driving source of the tool changing means, It is possible to solve all of environmental pollution, cost increase and inaccurate implementation operation by providing intermittent connection only at necessary time, and it is possible to easily apply to a large machining center.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a main part of a machining center in which a tool unclamping and a tool changing operation according to the present invention are unified.
Fig. 2 is a schematic view showing the inside of the tool unclamping means in a state of being connected to the tool changing means of Fig. 1; Fig.
Fig. 3 is an internal configuration diagram showing the configuration of the tool changing means safety device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a sectional view showing a main part of a machining center in which the driving of tool unclamping and tool changing according to the present invention is unified. Fig. 2 is a sectional view showing the inside of tool unclamping means And Fig. 3 shows an internal configuration diagram showing the configuration of the tool changing means safety device.

The attached machining center 10 of Fig. 1 mainly comprises a tool changing means 12 and a tool unclamping means 22 and the etic box 14 of the tool changing means 12, the servo motor 20 The head box 24 and the like of the tool unclamp 22 are arranged such that the drive shaft 16 of the tool changing means 12 and the interlocking shaft 28 of the tool unclamping means 22 are engaged with the first engagement hole 18 and the second engagement hole 18, And is fastened and fixed by a coupling hole 26. [

The drive shaft 16 is extended from the etisix box 14 of the tool changing means 12 provided in the machining center 10 and exposed to the outside, and at the end of the drive shaft 16, And a server motor 20 provided in the tool changing means 12 is used as a drive source of the drive shaft 16. The first drive shaft 16 is connected to the drive shaft 16 through a first coupling hole 18,

The head box 24 of the tool unclamping means 22 corresponding to the first coupling hole 18 is coupled to the first coupling hole 18 and fixed to the second coupling hole 18 so that the rotational force can be transmitted. And a sphere 26 is provided.

On the other hand, when the tool change is completed without the tool being clamped to the arm in the machining center during the machining center tool change, the limit switch 92 for the tool unclamping is activated to generate an alarm and at the same time, The operation is stopped and the tool changing means and the cylinder for tool unclamping 70 descend,

Rotated 180 degrees and then moved up with the tool changing means and the cylinder 70 for unclamping the tool so as to clamp the tool.

At this time, when the tool is clamped, at the same time, the limit switch 70 for the tool unclamping is operated to confirm that the tool is clamped, and when the arm is rotated by 75 °, the replacement of the tool for machining the workpiece is completed.

As described above, the first and second coupling members 18 and 26 may be in various shapes or separate parts if the driving force can be transmitted by being interdigitated with each other. For example, And the second engaging hole 26 is machined into the shape of a key groove, will be included in the technical features of the present invention. However, the shape and structure of the above-mentioned keys and key grooves are various and suggest a single method. However, the present invention is not limited thereto.

Referring to FIG. 2, the operation of the tool unclamping means in the state of being connected to the tool changing means is described. In the head box 24, the second coupling hole 26 can be interlocked with the interlocking shaft 28 A cam gear 32 is provided at one side of the gear portion 30 so as to be able to rotate by the rotational force of the gear portion 30. The cam gear 32 is provided with a disk 34 are directly connected to each other.

As the cam gear 32 rotates, the link member 40 is moved in a seesaw motion about the hinge portion 36 to push the upper portion of the drawbar (not shown) .

The locking and unlocking is selectively performed depending on whether the first coupling hole 18 of the tool changing means 12 and the second coupling hole 26 of the tool unclamping means 22 are engaged, (42) engaged with the disk (34) so that the operation of the disk (40) can be controlled,

The locking member 44 is provided so as to perform a seesaw motion around the hinge portion 46 located at the center, and the other side is drawn outside by a predetermined length.

Therefore, when the first coupling hole 18 of the tool changing means 12 and the second coupling hole 26 of the tool unclamping means 22 are separated from each other, the respective means are freely moved and operated, When the command for exchange is inputted, the head box 24 is transferred for tool exchange, and the first and second coupling holes 18 and 26 are interlocked and connected to one driving source.

While the first and second engaging portions 18 and 26 are engaged with each other as described above, the tool unclamping means 22 is first transferred so that one end portion of the locking member 44 provided thereon is pressed against the other mechanical pressing component 48, and the other side corresponding thereto is lifted upward.

As a result, the locking member 44 is initially engaged with the not-shown groove of the disk 34 so that the cam gear 32 is not rotated, and the cam gear 32 So that the link member 40 performs a seesaw motion about the hinge portion 36 to perform an unclamping operation.

That is, in the present invention, the tool changing means 12 and the tool unclamping means 22 are intermittently connected to each other only when necessary, thereby performing the unclamping operation.

3, the hydraulic pressure generated by the command of the program inputted to the machining center during the automatic tool change of the machining center is increased by the air booster 50, The oil in the air booster 50 is supplied to the solenoid valve 60 through the pipe 80. At the same time, the solenoid valve 60 is opened by the pressurized hydraulic pressure of the air booster 50 Oil is supplied to the tool clamp / tool unclamping cylinder 70 and the boosted hydraulic pressure of the air booster 50 causes the tool clamp / tool unclamping cylinder 70 to ascend, while at the same time, the tool clamp / tool unclamp So that the arm is raised to the ascending part together with the arm, and the arm is further rotated by 75 degrees to complete the clamping of the tool for machining the workpiece.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they have been used only in a general sense to easily describe the technical contents of the present invention and to facilitate understanding of the invention , And are not intended to limit the scope of the present invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: Machining center 12: Tool changing means
14: Ettype box 16: drive shaft
18: First coupling 20: Servo motor
22: tool unclamping means 24: headbox
26: second coupling hole 28: interlocking shaft
30: gear portion 32: cam gear
34: original plate 36, 46:
40: link member 42:
44: Locking member 48:
50: Air booster 60: Solenoid valve
70: cylinder 80: piping
90: Limit switch for tool clamp
92: Limit switch for tool unclamping

Claims (3)

A first engaging portion is formed at an end of the exposed drive shaft and a tool unclamping means corresponding to the first engaging portion is coupled to the first engaging portion And a gear portion is provided in the tool unclamping means so as to be interlocked with the second coupling means. A cam gear is provided on one side of the gear portion so as to engage with and interlock with each other, And a link member rotatable about a hinge portion at the center so as to perform an unclamping operation while performing a seesaw motion in accordance with the rotation operation of the gear. A disc is connected to the cam gear, and the operation of the link member The locking member having the locking part formed on one side thereof can be rotated about the hinge part located at the center part The other side is exposed so that the locking can be released by the external pressurization, and the safety device is interlocked with the announcement exchange stage and the unclamping means to stop the operation in a state where the tool is not clamped Machining centers with tool changing means and safety devices.
The method according to claim 1,
Wherein the first and second engaging members are engaged with each other to process the first engaging member into a key shape when a driving force is transmitted and the second engaging member is formed into a key groove. Machining center provided.
The method according to claim 1,
The safety device includes an air booster for increasing the hydraulic pressure generated by a command of the program inputted to the tool changing means, and an oil pump for moving the pipe by the hydraulic pressure boosted by the air booster and transmitting the oil to the tool clamp / tool unclamping cylinder And an arm for clamping a tool for interlocking with a tool clamp / tool unclamping cylinder for performing upward and downward linear motion by the hydraulic pressure of oil passing through the solenoid valve, And a limit switch for unclamping the tool to confirm whether the tool is clamped during upward and downward movement of the arm. When the tool for machining the workpiece is not clamped to the arm, an alarm is generated to stop the operation of the tool changing means Wherein said tool changing means is provided with a tool unclamping limit switch Machining Centers safety device is provided.
KR1020120029745A 2012-03-23 2012-03-23 A machining center prepared with tool changer and safety apparatus KR20150127786A (en)

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KR1020120029745A KR20150127786A (en) 2012-03-23 2012-03-23 A machining center prepared with tool changer and safety apparatus

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KR1020120029745A KR20150127786A (en) 2012-03-23 2012-03-23 A machining center prepared with tool changer and safety apparatus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108746884A (en) * 2018-07-18 2018-11-06 重庆双龙机械配件有限公司 Sprocket wheel blank treatment device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108746884A (en) * 2018-07-18 2018-11-06 重庆双龙机械配件有限公司 Sprocket wheel blank treatment device

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