KR20150091602A - Multi axis automatic tapping device for tap process of vehicle wheel carrier bracket - Google Patents

Abstract

The present invention provides a multi-axis automatic tapping device for a tap process of a vehicle wheel carrier bracket, which can improve preciseness and productivity by achieving automation even in a case where wheelbases of mutual tap processes are different from each other when each multi-axis screw hole is processed on two kinds of wheel carrier brackets. According to an embodiment of the present invention, the multi-axis automatic tapping device for the tap process of a vehicle wheel carrier bracket, which is used to form a tap on a rear bracket and a side bracket for a spare wheel carrier, comprises: a structure transfer unit, a structure turntable unit, a structure loading unit, a fixed multi-axis drill unit, a fixed multi-axis tapping unit, and a structure unloading unit. The structure transfer unit allows the rear bracket and the side bracket to be loaded thereon and transfers the rear bracket and the side bracket from one side to the other side thereof. The structure turntable unit is positioned on the other side of the structure transfer unit to partially rotate the rear bracket and the side bracket. The structure loading unit loads the rear bracket and the side bracket, which are loaded on the structure transfer unit, on the structure turntable unit. The fixed multi-axis drill unit forms a drill hole on each corresponding position of the rear bracket and the side bracket arranged adjacent to each other on an upper side of the structure turntable unit. The fixed multi-axis tapping unit is arranged at a position, which is rotated 90 degrees from the fixed multi-axis drill unit, to form a tap screw in the processed drill hole. The structure unloading unit discharges the structure after the tap process is completely performed to the rear bracket and the side bracket.

Description

Technical Field [0001] The present invention relates to a multi-axis automatic tapping device for tapping a vehicle wheel carrier bracket,

[0001] The present invention relates to a multi-axis automatic tapping device for tapping a wheel carrier bracket for a vehicle, and more particularly to automation even when the inter-tap distance between mutually tapped workpieces is different when screw holes of multiple axes are machined on two kinds of wheel carrier brackets And more particularly, to a multi-axis automatic tappet apparatus for tap forming of a vehicle wheel carrier bracket capable of improving precision and productivity.

Currently, the automobile industry pursues cost reduction and process rationalization through modularization by welding and riveting due to the platform of the same class of vehicle, and at the same time, the common use of parts using the bolting method for component compatibility between platforms TAPPING process is also increasing, and as the volume of the same part is increased, automation of the cutting process gradually becomes important.

The bracket body of the spare wheel carrier (SPARE WHEEL CARRIER) is attached to the lower part of the vehicle body by a bolting structure to support the load of the spare tire. If the spare tire tires are detached due to the tread of the bolt or bracket body during driving, It is a safety-related automobile part that threatens the safety of the vehicle and the other vehicle.

Therefore, the tapping process of the bracket body is a functionally important process. Since the number of tabs processed in the rear bracket 1 and the side bracket 2 as shown in Fig. 1 (A) is four (M8) and two (M6), the total number of tab processes for the year is several millions Respectively. Therefore, automation is required for labor intensity and industrial safety due to quality anxiety such as missing tabs and manual repetitive work by hand.

The current manufacturing process is carried out manually by the operator, such as unloading, conveying process, coolant supply, and air blowing. The tapping unit also uses a general drill unit with fixed multi-scale As a result, quality problems such as inability to verify when tabs are missing, excessive cycle time and premature wear of tabs are causing cost problems as well as product compatibility problems such as not being able to use equipment when product specifications are changed.

As a background of the present invention, Korean Patent Registration No. 10-1103326 (Multi-Axis Composite Processing Machine) has proposed a multi-axis composite exclusive processing machine. A multi-axis feed table having a cross shape in which four branches are at right angles to each other and having a first guide for guiding each branch to be fed to the center; A first conveying unit coupled to and transported to the first guide; A first conveying unit provided on each branch of the multi-axis conveying table for conveying the first conveying unit along the first guide; A second transfer unit provided at a center of each of the branches of the multi-axis transfer table; The multi-axle transfer table is provided with the second transfer section and the second transfer section is provided on the multi-axle transfer table. The first transfer section is arranged in a straight line in a diagonal direction so that one branch and another branch adjacent thereto cross each other from the center where the branches of the multi- A second guide for guiding to be conveyed; An object to be fixed which is provided at the center of the second transfer part and is conveyed by the second transfer part and has a jig for fixing the object to be processed and can rotate and move up and down; A processing unit which is provided on the upper portion of the first transfer unit and is transferred and processes a fixed object to be processed; And is characterized in that the processing is carried out independently by the processing portion or by a plurality of the processing portions.

However, in the background art, it is impossible to divide the rotation angle after setting, and it is impossible to increase the number of workpiece machining odd. In addition, since the space restriction on the workpiece side is accompanied by the machining feed in the center direction, mounting of the multi-axis head is limited. There is also a problem that the loading and unloading time is increased.

Korean Registered Patent No. 10-1103326 (multi-axis compound processing machine) Korean Patent Laid-Open Publication No. 10-2012-0131704 (CNC silicon multi-axis processing machine) Korean Registration No. 20-0434223 (automatic multi-tapping machine) Korean Registered Patent No. 10-0677824 (Multi-Axial Head for Machine Tools)

The present invention relates to a taper machining method for a vehicle wheel carrier bracket which realizes automation even when the inter-tapped distances between mutually tapped workpieces are different, Axis automatic tapping device for a multi-axis automatic tapping device.

According to a preferred embodiment of the present invention, there is provided a multi-axis automatic tapping device for tapping a vehicle wheel carrier bracket,

An apparatus for forming a tab in a rear bracket and a side bracket for a spare wheel carrier,

A workpiece transfer unit for transferring the rear bracket and the side brackets from one side to the other side;

A workpiece turntable unit which is positioned on the other side of the workpiece transfer unit and rotates the rear bracket and the side bracket in a divided manner;

A workpiece loading unit for mounting the rear bracket and the side brackets loaded on the workpiece transfer unit to the workpiece turntable unit;

A fixed multi-axis drill unit for forming a drill hole at a corresponding position of the rear bracket and the side bracket disposed adjacent to the upper side of the workpiece turntable unit;

A fixed multi-axis tapping unit arranged at a 90-degree rotated position from the fixed multi-axis drill unit to form a tap screw in the drilled hole;

And a workpiece unloading unit for discharging the workpiece after the rear bracket and the side bracket are finished tapping.

Further, the workpiece transfer unit

A workpiece loading die support frame;

A pair of workpiece loading dies disposed above the workpiece mounting die support frame and movable in the width direction;

A chain conveyor installed on the workpiece stacking die with a pair of double chains, for transferring the rear and side brackets from one side to the other;

And a loading die moving cylinder for moving the pair of workpiece loading dies in the width direction to determine a loading position and a standby position.

In addition, the workpiece loading unit,

A linear guide fixedly disposed above the workpiece transfer unit to be a workpiece transfer completion position;

An air chuck slidably coupled to the linear guide and linearly moving to chuck the atmospheric workpiece to release chucking at a machining position;

And a loading cylinder having a fixed end fixed to the linear guide side and a movable end connected to the air chuck side to move the air chuck back and forth.

Further, the workpiece turntable unit includes:

A geared motor fixedly disposed at the center of the main frame;

A turntable connected to the rotary shaft of the geared motor and driven in a divided manner;

A four-piece workpiece jig provided at an upper surface of the turntable at a predetermined angle of division to receive a rear bracket and a side bracket at a workpiece loading position;

And a clamp unit disposed on an upper surface of the turntable and disposed on one side of the four sets of the work jigs for clamping the rear bracket and the side bracket respectively supported by the jigs;

The clamp unit includes a clamp cylinder, a push link fixed at one end to the operation rod of the clamp cylinder, a clamp arm hinged to the other end of the push link, and a support link having one end hinged to the clamp arm and the other end fixed to the clamp cylinder side .

In order to support rotation of the turntable on the main frame,

A roller support plate horizontally installed on an upper portion of the main frame;

A plurality of roller supports mounted on the roller support plate;

And a guide roller rotatably supported on the roller support so as to be in line contact with the lower surface of the turntable.

According to the multi-axis automatic tapping apparatus for tapping a wheel carrier bracket for a vehicle of the present invention, loading and unloading are automatically performed, and two kinds of wheel carrier brackets are loaded on the work turntable unit side, It is possible to realize automation even when the distance between the axes of the mutual tapping is different, thereby improving the precision and productivity.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a perspective view showing a rear bracket and a side bracket of a wheel carrier for a vehicle.
2 is a front view of a multi-axis automatic tapping device for tapping a wheel carrier bracket for a vehicle according to the present invention.
Figure 3 is a plan view of Figure 2;
Figure 4 is a side view of Figure 2;
Fig. 5 is an enlarged view of one side of the work loading unit shown in Fig. 2; Fig.
6 is an enlarged view of the work turntable unit shown in Fig.
Fig. 7 is a plan view and a partial enlarged view of Fig. 6; Fig.
8 is an enlarged view of a portion 'K' in FIG.
9 is an enlarged view of a fixed multi-axis drilling unit and a fixed multi-axis tapping unit applied to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

The multi-axis automatic tappet apparatus for tapping a wheel carrier bracket for a vehicle according to the present invention is capable of automatically tapping two types of vehicle wheel carrier brackets 1 and 2 simultaneously as shown in Fig. That is, the rear bracket 1 and the side bracket 2 are automatically tapped simultaneously. Both the rear bracket 1 and the side bracket 2 are formed with four screw holes 1a and 2a of M8 and two screw holes 1b and 2b of M6. The screw holes 1a and 2a of these M8 have different centers (L1? L2) between the centers of the rear bracket 1 and the side bracket 2, respectively. In addition, the screw holes 1b of the M6 and the center (W1? W2) between the centers of the rear bracket 1 and the side bracket 2 are different from each other. However, according to the present invention, there is provided an automatic tacking apparatus for sequentially performing drilling and threading at two divided workpieces, that is, a rear bracket 1 and a side bracket 2 at the same time while being dividedly rotated.

2 to 4, the workpiece transfer unit 10 is provided on one side. The workpiece transfer unit 10 transfers the rear bracket 1 and the side bracket 2 from one side to the other side. That is, the workpiece transfer unit 10 transfers the rear bracket 1 and the side bracket 2 from the loading side of one side to the work loading side of the other side.

3 to 5, the workpiece transferring unit 10 includes a workpiece mounting die support frame 11, a pair of workpiece mounting dies 11 disposed above the workpiece mounting die support frame 11 and movable in the width direction, And the rear bracket 1 and the side bracket 2 are mounted on the workpiece mounting dies 12a and 12b with a pair of double chains 131a and 131b And a loading die moving cylinder (14a, 14b) for moving the pair of workpiece loading dies (12a, 12b) in the width direction to determine a loading position and a standby position, do.

The pair of double chains 131a and 131b are connected to the sprocket wheels 132 and 132, respectively, and receive rotational force not shown in the driving wheel shaft to periodically rotate by a predetermined amount. Therefore, when the pair of double chains 131a and 131b are rotated by the key conveyor 13, the rear bracket 1 and the side bracket 2 are moved to the loading position one pitch at a time. This transfer takes place after the loading of the previous workpiece is completed at the loading position.

The loading die moving cylinders 14a and 14b move the respective workpiece loading dies 12a and 12b to determine the loading order of the workpieces placed on the double chains 131a and 131b. Therefore, a large amount of workpieces can be queued before loading without increasing the feed length.

2 to 4, a workpiece turntable unit 20 is provided on the other side of the workpiece transfer unit 10. [ The workpiece turntable unit 20 rotates the rear bracket 1 and the side bracket 2 in a divided manner.

The workpiece turntable unit 20 includes a geared motor 21 fixedly disposed at the center of the main frame 25 as shown in Figs. 6 and 7, a turntable 22 connected to the rotation axis of the geared motor 21, And four sets of work jigs 23a and 23b which are installed on the upper surface of the turntable 22 at a predetermined angle so as to receive the rear bracket 1 and the side bracket 2 at the workpiece loading position and the turntable 22, A rear bracket 1 disposed on one side of the four sets of work jigs 23a and 23b and supported by the jigs 22 and 23 and a clamp unit 24 clamping the side bracket 2, .

A roller supporting plate 26 horizontally provided on the upper portion of the main frame 25 and a plurality of roller supporting plates 26 installed on the roller supporting plate 26 for supporting the rotation of the turntable 22, A roller support 27 and a guide roller 28 rotatably supported on the roller support 27 and in line contact with the lower surface of the turntable 22 can be further constructed.

Accordingly, when the geared motor 21 is driven, the turntable 22 simultaneously rotates in one direction (clockwise in this embodiment). At this time, the guide rollers 28 installed at four places are supported in a lower position so as to stabilize the rotation of the turntable 22 while rolling in a state of being in line contact with the turntable 22. The geared motor 21 is rotationally driven in the clockwise direction at an angle of rotation of 90 degrees by a control device not shown, and the turntable 22 is rotated in the same manner with a phase of 90 degrees.

The drilling position D, the tapping position T, and the drilling position R are set for each position 90 degrees clockwise with respect to the loading position R as the absolute position of the workpiece transfer unit 10 as the absolute position around the turntable 22, Unloading position (U).

8, the clamp unit 24 includes a clamp cylinder 241, a push link 242 fixed at one end to the operation rod of the clamp cylinder 241, a clamp arm 243 hinged to the other end of the push link 242, And a support link 244 having one end hinged to the clamp arm 243 and the other end fixed to the clamp cylinder 241 side.

The clamp cylinder 241 generates a clamping force for the workpiece when drilling and tapping, and releases the clamping force when unloading. That is, the clamp cylinder 241 pushes the push link 242 in the up operation to close the clamp arm 243 to generate the clamping force in the workpiece, and pulls the push link 242 in the down operation to move the clamp arm 243 Open to release the clamping force of the workpiece.

A workpiece loading unit 30 for mounting the rear bracket 1 and the side bracket 2 loaded on the workpiece transfer unit 10 to the workpiece turntable unit 20 is provided as shown in FIGS.

The workpiece loading unit 30 includes a linear guide 31 fixedly disposed above the workpiece transferring unit 10 to be a workpiece conveyance completion position and a linear guide 31 slidably engaged with the linear guide 31 to chuck the waiting workpiece An air chuck 32 for releasing chucking at a machining position and a fixed end fixed to the linear guide 31 side and a movable end connected to the air chuck 32 side for loading and unloading the air chuck 32 And a cylinder (33).

The position of the air chuck 32 is reciprocated between the workpiece transferring unit 10 and the workpiece turntable unit 20 in accordance with the control position of the loading cylinder 33. [ That is, when the operating rod of the loading cylinder 33 is in the retracted position, the air chuck 32 is located at the discharge waiting side of the workpiece transfer section. Also, when the operating rod of the loading cylinder 33 is in the advanced position, the air chuck 32 is positioned at the loading position R of the workpiece turntable unit 20. [ The air chuck 32 has two fingers at its tip and operates in accordance with the control direction of the air pressure to chuck or unchuck the workpiece.

3, a fixed multi-axis drill unit 40 and a fixed multi-axis tapping unit 50 are provided above the workpiece turntable unit 20. [ The fixed multiaxial drill unit 40 is installed at the drill position D and the fixed multiaxial tapping unit 50 is installed at the tapping position T. [ Therefore, the fixed multi-axis drill unit 40 and the fixed multi-axis tapping unit 50 are installed adjacent to each other with a phase of 90 degrees to each other.

The fixed multi-axis drill unit 40 processes the drill holes at the corresponding positions of the rear bracket 1 and the side bracket 2. The fixed multi-axis drill unit 40 has a selvedge capable of moving the drill up and down. In the present embodiment, the fixed multi-axis drill unit 40 simultaneously processes the four-axis M8 holes 1a and 2a and the two-axis M6 holes 1b and 2b of the workpiece at two places in sequence.

The fixed multi-axis tapping unit 50 is disposed at a 90-degree rotated position from the fixed multi-axis drill unit 40 to form a tap screw in the drilled hole. The fixed multi-axial tapping unit 50 has a selvedge capable of moving the tap tool up and down. In the present embodiment, the fixed multi-axial tapping unit 50 sequentially processes tap threads on the four-axis M8 holes 1a and 2a and the two-axis M6 holes 1b and 2b of the workpiece at two places.

When the tapping of the work (rear bracket 1 and side bracket 2) is completed via the fixed multi-axis tapping unit 50 as shown in Figs. 3 and 9, the workpiece is unloaded through the work unloading unit 60 . The workpiece unloading unit 60 has the same configuration as the above-described workpiece loading unit 30, and its mounting position is different only as the unloading position U, and a detailed description thereof will be omitted.

An operation state of the multi-axis automatic tappet apparatus for tap processing of the vehicle wheel carrier bracket configured as described above will be described.

First, the rear bracket 1 and the side brackets 2 are loaded by cyclically rotating a predetermined number of cycles of the double chains 131a and 131b of the workpiece transfer unit 10 to complete the transfer to the atmosphere side immediately before the loading of the workpiece.

Next, the rear bracket 1 and the side brackets 2 loaded on the workpiece transfer unit 10 by the workpiece loading unit 30 are loaded into the loading position of the workpiece turntable unit 20. This is because the workpiece is chucked by the air chuck 32 and then is loaded into the workpieces jigs 23a and 23b in the loading position by the advancing movement of the loading cylinder 33 and after the chucking of the air chuck 32, To the turntable 22 side.

Then, the geared motor 21 is driven in the workpiece turntable unit 20 to rotate the turntable 22 in a clockwise direction at intervals of 90 degrees. At this time, in the drill position (D), the fixed multi-axis drill unit (40) performs drilling to sequentially process the four-axis M8 holes and the two-axis M6 holes of the workpiece.

In addition, at the tapping position T, the fixed multi-axial tapping unit 50 performs tapping so that the four-axis M8 holes 1a and 2a of the rear bracket 1 and the four-axis M8 holes 2a and 2b of the side bracket 2 Tap threads are machined simultaneously on the M6 holes (1b, 2b) of the shaft.

Thereafter, the rear bracket 1 and the side bracket 2, which have been tapped through the work unloading unit 60, are taken out and discharged through the inclined withdrawal chute 62.

As described above, according to the present invention, the entire turntable 22 on the side of the work turntable unit 20 is subjected to tapping in the multi-axial holes of the rear bracket 1 and the side bracket 2, Machining is possible, and the productivity can be improved by automation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: Workpiece transfer unit
20: Workpiece turntable unit
30: Workpiece loading unit
40: Fixed multi-axis drill unit
50: Fixed multi-axis tapping unit
60: Workpiece unloading unit

Claims (5)

An apparatus for forming a tab in a rear bracket (1) and a side bracket (2) for a spare wheel carrier,
A workpiece transfer unit (10) for transferring the rear bracket (1) and the side bracket (2) from one side to the other side;
A workpiece turntable unit 20 positioned on the other side of the workpiece transfer unit 10 to rotate the rear bracket 1 and the side bracket 2 in a divided manner;
A workpiece loading unit (30) for mounting the rear bracket (1) and the side bracket (2) loaded on the workpiece transfer unit (10) to the workpiece turntable unit (20);
A fixed multi-axis drill unit (40) for forming a drill hole at a corresponding position of the rear bracket (1) and the side bracket (2) disposed adjacent to the upper side of the workpiece turntable unit (20);
A fixed multi-axis tapping unit (50) arranged at a 90-degree rotated position from the fixed multi-axis drill unit (40) to form a tap screw in the drilled hole;
And a workpiece unloading unit (60) for discharging the workpiece after the rear bracket (1) and the side bracket (2) are finished tapping the multi - axis automatic tapping device for tapping the vehicle wheel carrier bracket. The method according to claim 1,
The workpiece transfer unit 10
A workpiece loading die support frame (11);
A pair of workpiece mounting dies 12a and 12b disposed above the workpiece mounting die support frame 11 and movably disposed in the width direction;
A chain conveyor 13 installed on the workpiece mounting dies 12a and 12b with a pair of double chains 131a and 131b and for transferring the rear bracket 1 and the side brackets 2 from one side to the other, Wow;
And a loading die transfer cylinder (14a, 14b) for determining a loading position and a standby position by moving a pair of workpiece loading dies (12a, 12b) in the width direction, respectively, for tap processing of a vehicle wheel carrier bracket Multi-axis automatic tapping device. The method according to claim 1,
The workpiece loading unit (30)
A linear guide (31) fixedly arranged above the workpiece transfer completion position of the workpiece transfer unit (10);
An air chuck (32) slidably coupled to the linear guide (31) to linearly move and chuck the atmospheric workpiece to release chucking at a machining position;
And a loading cylinder (33) fixed to the linear guide (31) side and having a movable end connected to the air chuck (32) side to move the air chuck (32) back and forth. Axis automatic tapping device for tapping a plurality of tapes. The method according to claim 1,
The workpiece turntable unit (20)
A geared motor 21 fixedly disposed at the center of the main frame 25;
A turntable (22) connected to the rotary shaft of the geared motor (21) and driven in a divided manner;
A set of four workpiece jigs 23a and 23b installed on the upper surface of the turntable 22 with a predetermined angle of division to receive the rear bracket 1 and the side bracket 2 at the workpiece loading position;
The rear bracket 1 and the side bracket 2 which are provided on the upper surface of the turntable 22 and are disposed on one side of the four sets of work jigs 23a and 23b and are supported by the jigs 22 and 23, A clamp unit (24);
The clamp unit 24 includes a clamp cylinder 241, a push link 242 fixed at one end to the actuating rod of the clamp cylinder 241, a clamp arm 243 hinged to the other end of the push link 242, And a support link (244) hinged to the clamp arm (243) and the other end fixed to the clamp cylinder (241) side. 5. The method of claim 4,
In order to support rotation of the turntable 22 on the main frame 25,
A roller support plate 26 horizontally installed on the main frame 25;
A plurality of roller supports 27 disposed on the roller support plate 26;
Further comprising a guide roller (28) rotatably supported on the roller support table (27) and in line contact with a lower surface of the turntable (22).

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