KR20040062798A - Method for manufacturing trailing arm of vehicle rear suspension and apparatus therefor - Google Patents

Abstract

PURPOSE: A method and a device for processing a trailing arm of a rear suspension of a vehicle are provided to improve productivity by realizing automatic operation, to process the bush face of a trailing arm pipe at once, and to process the bush precisely by preventing the instable size deviation. CONSTITUTION: A device for processing a trailing arm of a rear suspension of a vehicle comprises clamp fixing units(100a,100b) including jigs(102a) for placing trailing arm pipes(52a,52b) and clamps(104a) for fixing the pipes and fixing and releasing the trailing arm pipes on the jigs, a cutting drive unit(200) cutting the bush faces of the trailing arm pipes in the shape of a half-moon at a high speed, slide transfer units(300a,300b) transferring the clamp fixing units, a cutting oil supply unit, an air supply unit, a user interface unit interfacing with a user, and an electronic control unit(700) controlling the transfer of the clamp fixing units and the driving of a drive motor(202) of the cutting drive unit.

Description

Method for processing trailing arm for vehicle rear suspension and device therefor {METHOD FOR MANUFACTURING TRAILING ARM OF VEHICLE REAR SUSPENSION AND APPARATUS THEREFOR}

The present invention relates to a suspension of a vehicle, and more particularly, to a trailing arm processing method for a vehicle suspension and a device therefor.

Suspension in the vehicle connects the axle to the body so that vibrations or shocks received by the axle are not transmitted directly to the body when driving, preventing damage to the body or cargo, and when the vehicle is driven straight, turning or steered. Appropriately control the posture of the device. The suspension device supports a chassis spring that mitigates the impact from the road surface, a pull-up soba that suppresses the free vibration of the chassis spring to improve ride comfort, and a stabilizer that prevents the vehicle from tilting to the side. Control arm and the like.

Suspensions are divided into front suspensions and rear suspensions, depending on the installation position of the vehicle. The front suspension system connects the frame and the axle to support the weight of the car, absorbs the vibration of the wheel, and installs a part of the steering mechanism. The front suspension can be divided into axle suspension type and independent suspension type (split axle suspension type) according to the type of front axle.In general, the independent suspension type is frequently used in passenger cars that emphasizes riding comfort or maneuverability. I use a lot of hanging. Rear suspensions generally use axle suspensions, but some cars use independent suspensions to enhance ride comfort and stability. The rear suspension is largely divided into axle suspension type and independent suspension type, and the independent suspension type is subdivided into trailing arm type, 5-link trailing type, torsion beam axle type (3-link type), and multilink type.

The trailing arm in the vehicle's rear suspension supports the shock absorbers, coil springs and torsion bars of the vehicle's rear chassis frame.

1 shows a plan view of a suspension behind a vehicle as an example. The trailing arm assemblies 2a, 2b are installed perpendicular to both ends of the torsion bar 4 in the torsion beam 6 transverse in the width direction of the vehicle body, as shown in FIG. The trailing arm assemblies 2a, 2b are provided with trailing arm pipes 7a, 7b, wheel spindle brackets 8a, 8b, pipe bushes 10a, 10b, spring seats 12a, 12b and damper brackets 14a, 14b), and the tips of the trailing arm assemblies 2a and 2b are installed to be coupled to the vehicle body. On the rear side of the trailing arm pipes 7a and 7b, the wheel spindle brackets 8a and 8b, in which the wheel drum and the spindle bar are assembled, are welded, and the damper brackets 14a and 14b for fixing the shock absorber and the spring coil are installed. The seated spring sheets 12a and 12b are welded. And pipe bushes 10a and 10b are welded to the leading ends of the trailing arm pipes 7a and 7b. Welded pipe bushes (10a, 10b) are formed with a through hole (not shown) of a predetermined size, the through hole is a rubber bushing (shown to minimize the transmission to the vehicle body by cushioning the vibration or shock received from the road surface) Not inserted).

Accordingly, the vibration or impact force transmitted while the vehicle is traveling is transmitted to the trailing arm assemblies 2a and 2b and the lower arm of FIG. 1 through the wheels, and then to the shock absorber and the spring damper, respectively. The shock and vibration are alleviated by the shock absorbing and absorbing action of the shock absorber and the spring damper, respectively, and the suspension behind the vehicle serves to enhance the riding comfort.

In order to manufacture such a trailing arm assembly (2a, 2b), manufacturing of the trailing arm pipe (7a, 7b) must be preceded first, the manufacturing of the trailing arm pipe (7a, 7b) is typically trailing Arm pipe cutting, trailing arm pipe bending, shape forming, pipe bushing, and torsion bar insertion hole drilling.

2 is a flow chart of a trailing arm pipe manufacturing process according to the prior art, the trailing arm pipe cutting process (step 20), the trailing arm pipe bending process (step 22), the shape forming process (step 24) ), The trailing arm pipes 7a and 7b are manufactured by the pipe bush surface processing process (step 26) and the torsion bar insertion hole drilling process (step 28).

In the prior art trailing arm pipe manufacturing process shown in FIG. 2, the pipe bush surface machining step (step 26) is performed by punching the pipe bush surface 40 of the trailing arm pipes 7a and 7b by a press die. Through the punching process (steps 26a and 26b). First, in the first punching process (step 26a), the upper end 42 of the pipe bushing surface 40 of the trailing pipes 7a and 7b is processed in a half moon shape as two press mold punchings, and the trailing pipes 7a, 7b) is inverted and the lower end 44 of the pipe bush surface 40 of the trailing pipes 7a and 7b is processed into two half press molds in the second punching process (step 26b).

The prior art method of punching the pipe bush surface 40 of the trailing arm pipes 7a and 7b by the press mold has a disadvantage of performing a total of four mold punchings. In addition, the material thickness of the trailing pipe (7a, 7b) is at least 4.0mm or more when the punched product (spring back), broken surface tearing phenomenon, the upper and lower cross-sectional dimension distribution, the core which is the mold part for breaking ( Core breakages often occurred and require rework. The conventional method of punching the pipe bush surface by the press die has resulted in such a decrease in productivity, delay in delivery, and loss of customer credit due to the accumulation of these problems and their problems.

Accordingly, an object of the present invention is to provide a trailing arm processing method for a vehicle rear suspension and an apparatus therefor that increases product productivity.

Another object of the present invention is to provide a trailing arm processing method for a vehicle rear suspension and an apparatus therefor that can process the trailing arm pipe bush surface at one time.

Another object of the present invention is to provide a trailing arm processing method for a vehicle rear suspension and an apparatus therefor that can automatically perform trailing arm pipe bush surface processing.

It is still another object of the present invention to provide a trailing arm processing method for a vehicle rear suspension and an apparatus therefor that prevent unstable dimensional dispersion during trailing arm pipe bush surface processing.

It is still another object of the present invention to provide a trailing arm processing method for a vehicle rear suspension and an apparatus therefor, such that the trailing arm pipe bush surface has a precise dimensional processing and a beautiful appearance.

Still another object of the present invention is to provide a semi-finished product processing apparatus capable of producing a variety of necessary semi-finished products by increasing the productivity and modifying the jig of the product.

According to the above object, in the trailing arm processing apparatus, the present invention is provided on a frame, and the upper and lower ends of the bush surface of the trailing arm pipe to be processed are cut at a high speed in a half moon shape at once by a shell cutter of a shell cutting method. A cutting drive unit, a jig in which the trailing arm pipe to be machined can be mounted, and a clamp for fixing the pipe, and a trailing arm pipe to be machined to be seated on the jig by a predetermined vertical lowering and raising control. A clamp fixing unit for crimping and releasing with the clamp and a clamp fixing unit for crimping and fixing the trailing arm pipe to be processed so that the bush surface of the trailing arm pipe to be cut can be cut by the cutting drive unit. Slide transfer unit for horizontal forward feed and backward feed by control, and user A user interface unit for the interface, and drive control of the drive motor of the cutting drive unit according to the user's request through the user interface unit, lowering and raising the clamp of the clamp fixing unit, horizontal forward feed to the slide transfer unit, and Characterized in that it consists of an electronic control unit for controlling reverse feed.

In addition, the present invention includes a cutting drive unit for rotationally cutting the upper and lower ends of the bushing surface of the trailing arm pipe to be processed in a half moon shape, a jig in which the trailing arm pipe to be processed is mounted, and a clamp for fixing the pipe. A trailing arm processing method in a trailing arm processing apparatus comprising at least a clamp fixing unit for vertically lowering and raising said clamp, and a slide conveying unit for horizontally forwarding and backward conveying said clamp fixing unit. Driving a cutting drive unit at a high speed by rotating the shell cutter of the cutting drive unit according to an automatic machining request of the user who seats the trailing arm pipe to be machined on the product seating part of the jig; and clamping the clamp fixing unit. Vertically lower the workpiece to be seated on the jig. The step of clamping and fixing an e-iling arm pipe, and horizontally forwarding the clamp fixing unit holding the trailing arm pipe to be processed by using the slide transfer unit, the upper and lower bushing surfaces of the crimped trailing arm pipe are rotated. A process of allowing the shell cutter to be cut at once, stopping the driving of the cutting drive unit as the upper and lower cutting edges of the bush are completed, and horizontally conveying the clamp fixing unit by the slide transfer unit and fixing the clamp. It is characterized by consisting of the process of vertically raising the clamp of the unit.

1 is a plan view of an example of a vehicle rear suspension;

2 is a flowchart illustrating a trailing arm pipe manufacturing process for a vehicle rear suspension according to the prior art;

3 is a flowchart illustrating a trailing arm pipe manufacturing process for a vehicle rear suspension according to an embodiment of the present invention;

4 is a front view of a trailing arm bush surface shape processing apparatus according to an embodiment of the present invention,

5 is a plan view of a trailing arm bush surface shape processing apparatus according to an embodiment of the present invention,

6 is a right side view of the trailing arm bush surface shape processing apparatus according to the embodiment of the present invention,

Figure 7 is a left side view of the trailing arm bush surface shape processing apparatus according to an embodiment of the present invention,

8 is a detailed perspective view of a clamp driver and a clamp in a clamp fixing unit according to an embodiment of the present invention;

9 is a view showing a jig without a trailing arm pipe to be processed in a jig of a clamp fixing unit according to an embodiment of the present invention,

10 is a view showing a state in which a trailing arm pipe to be processed in a jig of a clamp fixing unit according to an embodiment of the present invention is mounted on a product seating part;

11 is a view showing a clamp and a jig of a slide table and a clamp fixing unit of a slide transfer unit;

12 is a view showing a feed control device of a slide feed unit,

(A) is a perspective view of a cutting drive unit, FIG. 13 (b) is an enlarged view of a cutting head,

14 is a view showing an air nozzle of the air supply unit,

15 is an enlarged view of the operation panel of FIG. 4;

16 is a schematic block diagram of a trailing arm bushing shape cutting device according to an embodiment of the present invention;

17a and 17b is a trailing arm bush surface shape processing control flow chart according to an embodiment of the present invention,

18 is a view showing a trailing arm bush surface shaped according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

3 is a flowchart illustrating a trailing arm pipe manufacturing process for a vehicle rear suspension according to an embodiment of the present invention. Similar to FIG. 2, the trailing arm pipe cutting process (step 30) and the trailing arm pipe bending are performed. Trailing arm pipes 7a and 7b by the step (32 steps), the shape forming step (34 steps), the pipe bush surface machining step (36 steps), and the torsion bar insertion hole drilling step (38 steps). ) Is manufactured. In the trailing arm pipe manufacturing process according to the embodiment of FIG. 3, all of the processes except for the pipe bush surface processing process (step 36) are the same as the conventional trailing arm pipe manufacturing process shown in FIG. 2.

Pipe bush surface machining process (step 36) according to an embodiment of the present invention is a shell cutting (shell) so that the upper and lower ends (42,44) of the pipe bush surface 40 of the trailing arm pipe (2a, 2b) is processed in a half moon shape at a time cutting) method. In order to allow the upper and lower ends 42 and 44 of the pipe bush surface 40 of the trailing arm pipes 2a and 2b to be processed at once in a half moon shape, in the embodiment of the present invention, a trailing method using a shell cutting method is performed. A female bush surface shape processing apparatus is provided.

4 to 7 is a configuration diagram of the trailing arm bush surface processing apparatus according to an embodiment of the present invention, Figure 4 is a front view of the trailing arm bush surface processing apparatus, Figure 5 is a plan view of the trailing arm bush surface processing apparatus, 6 is a right side view of the trailing arm bush surface shape processing apparatus, and FIG. 7 is a left side view of the trailing arm bush surface shape processing apparatus.

16 is a schematic block diagram of a trailing arm bushing shape cutting device according to an embodiment of the present invention.

The trailing arm bush surface processing apparatus shown in FIGS. 4 to 7 has a clamp fixing unit (100a, 100b), a cutting drive unit (200), a slide feed unit (large), as in the schematic block configuration shown in FIG. 300a and 300b, the coolant supply unit 400, the air supply unit 500, the user interface unit 600, and the electronic control unit 700 are included.

As shown in the front view of FIG. 4, the trailing arm bushing surface processing apparatus includes clamp fixing units 100a and 100b and slide feed units on the left and right sides of the cutting drive unit 200 so that two people can work at the same time. Fields 300a and 300b are provided, respectively. The cutting drive unit 200, the clamp fixing units 100a and 100b, and the slide transfer units 300a and 300b are all installed on the main frame 50. The main frame 50 is supported by a plurality of pedestals, and a coolant tank is provided therein.

As shown in FIGS. 4 to 7, the clamp fixing units 100a and 100b respectively installed on the left and right sides of the cutting drive unit 200 have a product to be processed, that is, a trailing arm pipe 52a and 52b to be mounted. Jig (102a, 102b) having a product mounting portion, the clamp (104a, 104b) for pressing and fixing the trailing arm pipe (52a, 52b) to be seated on the product mounting portion, and the clamp (104a, 104b) ) Includes clamp drivers 106a and 106b for driving vertically lowered and vertically raised by predetermined control. Jig 102a, 102b, clamp 104a, 104b, and clamp drive part 106a, 106b of the said clamp fixing unit 100a, 100b are integrated as a clamp fixing unit frame, and slide feed unit 300a, 300b is carried out. Can be moved horizontally.

8 illustrates a detailed perspective view of the clamp driver 106a and the clamp 104a in the clamp fixing unit 100a according to an exemplary embodiment of the present invention.

Referring to FIG. 8, the clamp driver 106a has two hydraulic cylinders 108 and 110 corresponding to the clamps 130 and 132, respectively, and guide slides 112, 114 and 116 and 118 before and after the two hydraulic cylinders 108 and 110. Each is provided. The first hydraulic cylinder 108 and the front and rear guide slides 112 and 114 are mounted to the first clamp 130 through the clamp fixing unit frame 124, and the second hydraulic cylinder 110 and the front and rear guide slides 116 and 118. Is mounted to the second clamp 132 through the clamp fixing unit frame 124. The first and second hydraulic cylinders 108 and 110 drive the first and second clamps 130 and 132 vertically and vertically upward by hydraulic pressure, and guide slides 112 and 114 provided before and after the two hydraulic cylinders 108 and 110. And 116 and 118 prevent the first and second clamps 130 and 132 from rotating by the hydraulic cylinders 108 and 110 being vertical axes when the first and second clamps 130 and 132 are vertically lowered and vertically raised. In the clamp driving unit 106a, the clamp rising limit detection sensor 120 and the clamp falling limit detection sensor 122 are installed at the upper end and the lower end of the hydraulic cylinder 110. When the clamps 104a and 104b are raised by the clamp driving units 106a and 106b, the clamp rising limit detection sensor 120 detects the rising limit, and the clamp falling limit detecting sensor 122 is the clamp 104a or the like. 104b) is a sensor for detecting a lowering limit when the trailing arm pipes 52a and 52b are lowered in order to crimp and fix the processing. The rising limit value and the falling limit value of the clamp rising limit detection sensor 120 and the clamp falling limit detection sensor 122 may be set by a user.

The two clamps 130 and 132 are positioned to fix the middle part and the rear part of the trailing arm pipe 52a to be processed seated on the product seating part of the jig 102a, and through the clamp fixing unit frame 124. The first hydraulic cylinder 108 and the front and rear guide slides 112 and 114 are mounted to the first clamp 130 in a row, and the second hydraulic cylinder 110 and the front and rear guide slides 116 and 118 are arranged in a row to the second clamp 132. Is mounted on. In addition, each of the two clamps 130 and 132 is formed with a crimp fixed recess in which a center is recessed in a triangular shape to fix the middle and tail portions of the trailing arm pipe 52a to be processed.

9 and 10 are detailed perspective views of the jig 104a of the jig 104a, 104b of the clamp fixing unit 100a, 100b according to the embodiment of the present invention, and FIG. 9 is a trailing arm pipe 52a to be machined. ) Is a view showing a state not seated on the product seating portion 140 of the jig 104a, Figure 10 is a state in which the trailing arm pipe 52a to be processed is seated on the product seating portion 140 of the jig 104a Figure showing.

9 and 10, the jig 104a includes a product seating part 140 and a jig base 148 supporting the product seating part 140. The product seating part 140 of the jig 104a is molded with a product seating surface so that the trailing arm pipe 52a to be processed is accurately seated, and a trail to be processed is provided at the right end of the product seating part 140. A stopper 146 having a locking step function is provided to allow one edge portion of the bush surface of the ring arm pipe 52a to be caught. Clamp recesses 142 and 144 are formed in the middle part and the rear part of the product seating part 140 of the jig 104a to press-fix the middle part and the rear part of the trailing arm pipe 52a to be processed. The structure of the jig 104a, 104b allows the user to safely seat the trailing arm pipe 52a to be processed on the product seating portion 140 of the jig 104a, 104b.

The clamp fixing units 100a and 100b in which the respective parts are described in detail together with FIGS. 8 to 10 have the product seat 140 of the jig 104a and 104b through the vertical lowering and vertical raising control of the clamps 104a and 104b. The trailing arm pipes 52a and 52b to be machined seated in the press are fixed or released. The vertical drop control and the mathematical lift control to the clamp fixing units 100a and 100b are performed by the electronic control unit 700 of FIG.

In the clamp fixing units 100a and 100b shown in Fig. 4, the jig base 148 of the jig 104a of Figs. 8 to 10 allows the clamp fixing units 100a and 100b to be moved forward and backward in the horizontal direction. The slide table 302a of the slide transfer unit 300a. The slide conveying units 300a and 300b have slide tables 302a and 302b for forward and backward conveying the clamp fixing units 100a and 100b in the horizontal direction and the horizontal forward and backward directions of the slide tables 302a and 302b. A slide feed control device (304a, 304b) for controlling the feed, and the clamp fixing unit (300a, 300b) is moved forward and backward in the horizontal direction by the hydraulic pressure using a hydraulic cylinder. Hereinafter, a slide feed unit 300a on the left composed of a slide table 302a and a slide feed control device 304a will be described in detail. The slide feed unit 300b of the right side shown in FIG. It should be understood that the configuration is the same as that of the slide transfer unit 300a.

FIG. 11 is a view showing a left slide table 302a of the slide tables 302a and 302b of the slide transfer units 300a and 300b, and FIG. 12 is a feed control device 304a, of the slide transfer units 300a and 300b. Figure 304 shows a left feed control device 304a.

First, referring to FIG. 11, the slide table 302a of the slide transfer unit 300a is mounted on the slide rail 306 and the slide rail 306 fastened with bolts on the main frame 50 and moved forward in the horizontal direction. And a slide bed 308 having a structure that can be conveyed backwards. The left end of the slide rail 306 is equipped with a slide reverse limit switch 321 for detecting the reverse limit of the slide table 302a, the slide bed 308 is a slide table 302a is fully retracted In this case, a stopper 323 is installed to contact the slide reverse limit switch 321. When the stopper 323 touches the slide backward limit switch 321, the slide backward limit switch 321 provides the slide backward movement limit detection signal to the electronic control unit 700. The stopper 323 and the slide backward limit switch 321 correspond to the feed control device of the slide transfer unit 300a.

The upper part of the slide bed 308 is fixed to the jig base 148 of the clamp fixing unit (100a, 100b), it is fastened by a plurality of bolts. In addition, the lower portion of the slide bed 308 is provided with a feed rate controller 310 to enable the user to adjust the feed rate. The user can reduce the burr at the time of cutting the bushing surface by properly adjusting the slide moving speed to be fed to the shell cutter that is rotated at high speed using the feed speed controller 310. At the left end of the slide table 302a of the slide transfer unit 300a of FIG. 11, a left feed control device 304a of the slide transfer unit 300a shown in FIG. 12 is provided.

Referring to FIG. 12, the feed control device 304a of the slide feed unit 300a extends from the slide advance limit switch device 320 and the slide table 302a for adjusting the processing amount in order to detect the slide feed limit. A process control stopper 322 fixedly fastened to the left end of the slide hydraulic cylinder 324 is provided. When the slide table 302a of the slide feed unit 300a moves to the shell cutter side of the cutting drive device 200, the hydraulic cylinder 324 extended to the slide table 302a and the work control stopper 322 fixedly fastened to each other. Is moved together to the shell cutter side. When the slide table 302a proceeds to the slide feed limit position, the process control stopper 322 fixedly fastened to the left end of the hydraulic cylinder 324 comes into contact with the slide forward limit switch device 320, thereby limiting the switch. The device 320 provides a slide feed limit detection signal to the electronic control unit 700 (FIG. 16). The processing adjustment stopper 322 is moved on the hydraulic cylinder 324 by the user to adjust the bushing amount of the trailing arm pipe 52a to be processed and is fixedly fixed when the machining adjustment is completed.

The feed control device 304a of the slide feed unit 300a of FIG. 12 may be protected from foreign substances such as chips by a cover and a cover support made of a transparent material.

11 and 12, the slide transfer units 300a and 300b having the structure described in detail with reference to FIGS. 11 and 12 have a bush surface of the trailing arm pipes 52a and 52b to be processed at once by the shell cutter of the cutting drive unit 200. FIG. The clamp fixing unit 100a, 100b, which press-fixes the trailing arm pipes 52a, 52b to be machined so as to be rotationally cut, is moved forward in the horizontal direction, and after the bushing is completed, the clamp fixing unit To make the (100a, 100b) backward feed in the horizontal direction. Horizontal forward feed control and backward feed control for the slide feed units 300a and 300b are performed by the electronic control unit 700 of FIG.

4 to 7, the cutting drive unit 200 includes a cutting drive motor 202, a pulley 204, a cutting drive unit spindle 206, and a cutting head 208. The cutting drive motor 202 may be implemented as, for example, a three-phase motor capable of rotating at high speed at 850 rpm (revolution per minute). Drive control of the cutting drive motor 202 is performed by the electronic control unit 700 of FIG. The power of the cutting drive motor 202 is transmitted to the cutting drive unit spindle 206 and the cutting head 208 through a pulley 204 that is a power transmission device.

FIG. 13A is a detailed perspective view of the cutting drive unit 200 including the cutting drive motor 202, the pulley 204, the cutting drive unit spindle 206, and the cutting head 208, and FIG. 13. (B) is an enlarged view of the cutting head 208 of FIG.

Referring to FIG. 13B, the cutting head 208 has four shell cutters 220a to 220d slightly twisted at an angle of several degrees in the axial direction of the head circumference, and the four shell cutters 220a. Each of the five insert chips 220 is mounted in a line. Each of the five insert chips 220 is a rectangular thin cube, which is a milling cutter which rotates the bush surface of the trailing arm pipes 52a and 52b to be processed, ie, substantially in a half moon shape. The square shape of the insert chip 220 provides the advantage of being able to turn to another cutting blade surface when the cutting blade surface becomes worn and dull. The diameter of the cutting head 208 is determined by the cutting diameter of the bush surface of the trailing arm pipes 52a and 52b to be processed. Therefore, the cutting head 208 is made exclusively to the cutting diameter of the bushing surface of the trailing arm pipes 52a and 52b to be processed. In the present invention, the upper and lower half moons of the bushing surfaces of the trailing arm pipes 52a and 52b can be rotationally cut at the same position by the cutting head 208 having a structure as shown in FIG. 13 (b). Contribute to quality stability.

As described above in conjunction with FIGS. 13A and 13B, the cutting drive unit 200 is fixed by the clamp fixing units 100a and 100b and by the slide feed units 300a and 300b. The upper and lower ends of the bushing surface of the trailing arm pipes 52a and 52b which are horizontally conveyed are cut at the same time by the shell cutting method in a high speed rotation at the same time.

Meanwhile, in FIG. 13A, a cutting oil discharge nozzle (not shown) is provided in the main frame 50 behind the cutting head 208 so that the cutting head 208 is always rotated when the cutting head 208 is rotated at a high speed. Cutting oil is injected into the The injection of the coolant lowers the heat generation of the bushing surfaces of the cutting head 208 and the trailing arm pipes 52a and 52b due to the cutting, and also facilitates the cutting of the bushing surface. The cutting oil is supplied by the cutting oil supply unit 400 shown in FIG. 16, and the cutting oil supply control of the cutting oil supply unit 400 is performed by the electronic control unit 700 of FIG. 16. The cutting oil supply unit 400 includes a cutting oil tank installed in the main frame 50, a cutting oil pump 402 installed on the bottom surface of the right side of the main frame 50, and a cutting oil supply pipe (not shown). And a coolant supply nozzle (not shown) for injecting coolant toward the cutting head 208.

4, the jig at the trailing position of the trailing arm pipe 52a, 52b seated on the product seating part (140 of FIGS. 8 and 9) of the jig 102a, b of the clamp fixing unit 100a, b. As illustrated in FIG. 14, an air nozzle 502 is installed on the base 148. The air nozzle 502 is a device for injecting air into the rear through-holes of the trailing arm pipes 52a and 52b which have been cut to discharge chip foreign substances due to rotational cutting out of the pipe. The air injection using the air nozzle 502 is performed by the air supply unit 500 shown in FIG. 16, and the air supply control of the air supply unit 500 is performed by the electronic control unit 700 of FIG. 16. do. The air supply unit 500 includes an air nozzle 502 installed on the jig base 148 at the trailing arm pipes 52a and 52b, an air supply tank, and the air supply tank to the air nozzle 502. It consists of a connected air supply pipe (not shown).

On the other hand, the bushing surfaces of the trailing arm pipes 52a and 52b seated on the product seating portions (140 in FIGS. 8 and 9) of the jigs 102a and 102b are rotated by the cutting head 208 of the cutting drive unit 200. When cutting, the cutting results in processing foreign matter such as chips. These chip foreign matters are collected in the chip receiving box 510 installed in the lower left center of the main frame 50 through an inner passage located below the cutting head 208. 4, 5 and 7 as shown in Figure 4, the chip receiving box is a structure that can be removable by the user using a handle, when the foreign matter accumulated in the chip receiving box 510 the user The chip receiver box 510 may be detached and discard the chip foreign matter.

4, 5, and 6, the trailing arm bush surface processing apparatus of the present invention is provided with an oil tank 520 and an oil motor 522 slightly apart from the right rear side of the main frame 50. . The oil tank 520 and the oil motor 522 are devices for supplying oil injected into the cylinders of the clamp fixing units 100a and 100b and the slide transfer units 300a and 300b. The control of the oil motor 522 is performed by the electronic control unit 700 of FIG.

As illustrated in FIG. 16, the trailing arm bush surface processing apparatus according to the embodiment of the present invention includes a user interface unit 600 for interfacing with a user. The user interface unit 600 includes an operation panel 602 for displaying various operation statuses and operation control of a user, and two remote control panels 610a and 610b for remote control.

The configuration of the operation panel 602 will be described with reference to FIGS. 4 and 6, and the operation panel 602 is installed in a space that a user can easily see when working. To this end, the operation panel 602 extends from the right rear surface of the main frame 50 and is suspended in a predetermined space through a connecting pipe 604 that is bent to "c". The joint portion of the operation panel 602 and the corresponding connecting pipe 604 is rotatably assembled, and the rear surface of the main frame 50 and the joint portion of the corresponding connecting pipe 60 are rotatably assembled, so that the user The panel front position of the operation panel 602 can be adjusted arbitrarily, and the position in space of the operation panel 602 can also be conveniently adjusted.

FIG. 15 is an enlarged view of the operation panel 602 of FIG. 4.

Referring to FIG. 15, reference numeral 750 is a power indicator that lights up when the power key lock switch 756 is 'on'. The 752 is a ready-actuated push switch that, when pressed by the user, activates the hydraulic pump and lights up. 754 is a home position indicator that lights up when the slide table and clamp are in place. The 756 is a power keylock switch that turns it to the left to turn it off and to the right to turn it on. 758 is a left slide error indicator. It turns on when there is a left slide or left clamp error. 760 is a right slide error indicator. It turns on when there is a right slide or right clamp error. 762 is a left yield display counter. When the user sets the yield by pressing the "+" and "-" buttons located to the right of the counter, the counter is configured to stop the automatic operation when the number of automatic operations reaches the set yield. To resume automatic operation, the left yield display counter 762 must be reset. 764 is a counter on the right side of the display of the amount of production. When the user sets the amount of production by pressing the " + " and "-" In order to resume automatic operation, the right yield display counter 764 must be reset. The 766 is an operation selector switch. When the 'manual' operation is selected, the switch lever is turned to the left, and when the 'single drive' is selected, the switch lever is turned to the right. The 768 is a switch that controls spindle drive (motor drive). If you want to select the stop, turn the switch lever to the left. If you want to choose drive, turn the switch lever to the right. 770 is the coolant selector switch and 772 is the air supply selector switch. The 774 is a left start illuminated push button switch and the user starts to press the left single-acting (automatic) operation. The 776 is a right start illuminated push button switch and the user starts to press the left single actuation (automatic). 778 is an emergency stop push button switch. When a user presses a button, all units such as a cutting drive motor unit 200, a clamp fixing unit 100a and 100b, a slide feed unit 300a and 300b, and a coolant supply unit 400 are included. And the operation of each unit is stopped immediately. The 780 includes a push button switch 784 and a selection rotary switch 782 as a manual operation unit, and a user can select about 10 types of manual driving operations by rotating the selection rotary switch 782.

The user can perform manual operation or single-acting operation (automatic operation) using the operation panel 602.

First, manual operation is an operation required for adjusting the bite in the cutting head 208 of the cutting drive motor unit 200, which is unnecessary for the usual operation (cutting operation). For manual operation, first, the switch lever of the operation selection switch 766 of the operation panel 602 should be turned to the left (manual), and then the manual rotary switch 782 of the manual operation unit 780 is rotated to select manual operation. . Manual operations selectable in the selection rotary switch 782 include forward or reverse for each of the left and right slides, falling or rising for each of the left and right clamps, and the like. After selecting the desired manual operation by rotating the selection rotary switch 782, selecting the on button of the push button switch 784 of the manual operation unit 780 operates the selected manual operation.

Next, single-acting operation (automatic operation) is a task to produce products normally. In order to perform single-acting operation, each state must be surely set in advance by the above-described manual operation. For single-acting operation (automatic operation), the switch lever of the operation selection switch 766 of the operation panel 602 must first be turned to the right (single-acting), and then the left start illuminated push button switch 774 or / and the right start illuminated illumination are pressed. The button switch 776 is pressed. Alternatively, a button switch provided on the left remote control panel 610a corresponding to the left start illuminated push button switch 774 and / or the left remote control panel 610a corresponding to the right start illuminated push button switch 776. Press the button switch.

As shown in FIG. 4, the left and right remote control panels 610a and 610b for remote control have a main frame 50 in which the left and right slide tables 302a and 302 are located, which is a very convenient place for the user to work with. Installed on). The left and right remote control panels 610a and 610b are provided with a button switch that is frequently used in a user's work or necessary for an emergency. The left remote control panel 610a includes a left start button switch corresponding to the left start illuminated push button switch 774 of the operation panel 602 and an emergency action corresponding to the emergency action button switch 778 of the operation panel 602. Button switch is included. The right remote control panel 610b has a right start button switch corresponding to the right start illuminated push button switch 776 of the operation panel 602 and an emergency action corresponding to the emergency action button switch 778 of the operation panel 602. Button switch is included.

The user's manual operation or single-acting operation (automatic operation) operation or various controls using the operation panel 602 or the remote control panels 610a and 610b are applied to the electronic control unit 700 to provide overall processing for trailing arm bush surface shapes. The operation is controlled.

The electronic control unit 700 shown in FIG. 16 is mounted in the electronic control unit box 700 on the left rear side of the main frame 50 as shown in the front view of FIG. 4, the top view of FIG. 5, and the left side view of FIG. 7. In order to process the trailing arm bush surface shape according to an embodiment of the present invention, the overall control of each part is performed.

17A and 17B are flowcharts of a trailing arm bushing shape processing control according to an embodiment of the present invention, which is performed by the electronic control unit 700 of FIG. 16.

Hereinafter, an operation of shaping the trailing arm bush surface will be described in detail with reference to FIGS. 4 to 17A and B.

The trailing arm bush surface processing apparatus according to the embodiment of the present invention includes clamp fixing units 100a and 100b and slide transfer units 300a and 300b on the left and right sides of the cutting drive unit 200, respectively. Each can be used to machine the trailing arm bush surface. That is, the user can use only one trailing arm bushing surface processing apparatus on the left or right side, and may use both the trailing arm bushing surface processing apparatus on the left and right sides together. The user must set each state certainly in the operation by manual operation in advance for single-acting operation (automatic operation) to produce the product. After reliably setting each state by manual operation, the user must press the operation ready dimming push switch 752 of the operation panel 602. Accordingly, the electronic control unit 700 operates the hydraulic motor 522 and turns on the operation ready dimming push switch 752. The user must select single-acting operation (automatic operation) using the operation panel 602. That is, the user should turn the switch lever of the operation selection switch 766 of the operation panel 602 to the single acting (automatic) position. At this time, the spindle drive (motor drive) switch 768, the coolant selector switch 770, the air supply selector switch 772 should all be in the on state. By selecting the single-acting operation (automatic operation), the electronic control unit 700 recognizes the automatic mode. Also, the user should set the yield count value of the left yield display counter 762 and the right yield count value of the right yield display counter 764 before the automatic operation.

The user then mounts the trailing arm pipes 52a, 52b to be machined to the product seat 140 of the jig 104a, 104b and the left start illuminated push button switch 774 of the operation panel 602 or / and When the right start illuminated push button switch 776 is pressed or the left or right start button of the left or right remote control panels 610a and 610b is pressed, the electronic control unit 700 does this in step 710 of FIG. 17A. Determine and proceed to step 712. In operation 712 of FIG. 17A, it is determined whether the automatic mode is selected. When the user selects single-acting operation (automatic operation) using the operation panel 602, the automatic mode is determined. If in the manual mode, the operation proceeds to step 714 of FIG. 17A to perform an operation corresponding to the manual mode. In the automatic mode, the operation proceeds to step 716 of FIG. 17A.

In operation 716 of FIG. 17A, the electronic control unit 700 drives the spherical cutting driving motor 202 of the cutting driving unit 200 to rotate the shell cutter of the cutting head 206. In addition, the coolant pump 402 is driven to allow the coolant to be injected from the coolant nozzle (not shown) toward the shell cutter of the cutting head 206. The electronic control unit 700 then hydraulically drives the clamp drive units 106a and 106b of the clamp fixing units 100a and 100b to vertically lower the clamps 104a and 104b, thereby seating the products of the jig 102a and 102b. The trailing arm pipes 52a, 52b to be seated in the part 140 will be press-fitted by clamps 104a, 104b that are vertically lowered. When the clamps 104a and 104b are vertically lowered such that the trailing arm pipes 52a and 52b to be processed seated on the product seating portions 140 of the jigs 102a and 102b are completely pressed down, the clamp driving units 106a and 106b The clamp lower limit detection signal is applied to the electronic control unit 700 by the clamp lower limit detection sensor 122 installed at the lower end of the hydraulic cylinder 110).

When the clamp falling limit detection signal is applied, the electronic control unit 700 determines this in step 720 of FIG. 17A and proceeds to step 722 of FIG. 17A. The electronic control unit 700 hydraulically drives the feed control devices 304a and 304b of the slide feed units 300a and 300b in step 722 of FIG. 7A to mount the slide bed 308 on which the clamp fixing units 100a and 100b are mounted. To the shell cutter of the cutting drive unit 200 in the horizontal forward direction, the clamping unit (100a, 100b) for pressing and holding the trailing arm pipe (52a, 52b) to be processed also the cutting drive unit (200) In the direction of the shell cutter. Accordingly, the upper and lower ends of the bushing surfaces of the trailing arm pipes 52a and 52b seated on the product seating portions 140 of the jigs 102a and 102b and crimped and fixed are gradually moved by the shell cutter of the cutting drive unit 200 rotating. It will be cut simultaneously into shapes. The slide bed 308 is such that the upper and lower ends of the bush surface of the trailing arm pipes 52a and 52b to be seated on the product seating portions 140 of the jigs 102a and 102b are cut in a half moon shape by the shell cutter. When horizontally advanced, the process control stopper 322 provided in the feed control devices 304a and 304b of the slide feed units 300a and 300b comes into contact with the limit switch device 320 so that the limit switch device 320 is The slide transfer forward limit detection signal is applied to the electronic control unit 700.

When the slide feed forward limit detection signal is applied, the electronic control unit 700 determines the slide feed forward limit detection in operation 724 of FIG. 17A, and minimizes burr generation on the half moon-shaped cutting surface that is rotated. After stopping the forward movement of the slide bed 308 in step 726 of 17a, a preset time, for example, about 2-3 seconds is waited. Thereafter, the electronic control unit 700 proceeds to step 728 of FIG. 17A to stop the driving of the cutting drive motor 202 of the cutting driving unit 200 and to stop the cutting oil supply. In this way, the bush surface rotational cutting of the trailing arm pipes 52a and 52b is completed.

Thereafter, the electronic control unit 700 proceeds to step 730 of FIG. 17B to control the air supply unit 500 to be driven to process the tail of the trailing arm pipes 52a and 52b which process the air from the air nozzle 502. Injecting strongly into the through-holes allows chip foreign matter remaining in the through-holes to be discharged to the outside of the trailing arm pipes 52a and 52b. After the error injection is performed for a predetermined time to discharge the chip foreign matter to the outside, the driving of the air supply unit 500 is stopped.

After performing step 730 of FIG. 17B, the electronic control unit 700 proceeds to step 732 to hydraulically drive the feed control devices 304a and 304b of the slide transfer units 300a and 300b to clamp fixing units 100a and 100b. The slide bed 308 is equipped with a rapid backward transfer to return the slide bed 308 to its original position. When the slide reverse limit switch 321 installed on the slide rail 36 applies the slide transfer backward limit detection signal to the electronic control unit 700, the electronic control unit 700 recognizes that it returns to its original position and slides the slide bed 308. Stop backward feed. After performing step 732 of FIG. 17B, the electronic control unit 700 proceeds to step 734 of FIG. 17B. In step 734 of FIG. 17B, the clamp driving units 106a and 106b of the clamp fixing units 100a and 100b are hydraulically driven to raise the clamps 104a and 104b vertically. When the clamps 104a and 104b are sufficiently vertically raised, the clamp lift limit detection signal is transmitted to the electronic control unit by the clamp lift limit detection sensor 120 installed at the upper end of the hydraulic cylinder 110 of the clamp drive units 106a and 106b. 700 is applied.

When the clamp rising limit detection signal is applied, the electronic control unit 700 recognizes the clamp rising limit in step 736 of FIG. 17B and proceeds to step 738 of FIG. 17B. In step 738 of FIG. 17B, the yield count value of the left yield display counter 762 and / or the right yield display counter 76 of the operation panel 602 is increased by “1” and displayed. Thereafter, the electronic control unit 700 determines whether the product (processed trailing arm pipe) produced in operation 740 of FIG. 17B has reached a preset yield count value. The flow returns to step 710 to perform the above-described operation again. If the produced product yield reaches a preset yield count value, the product production, i.e., the trailing arm bushing process is terminated.

FIG. 18 is a view showing the bush surface 40 of the trailing arm pipes 7a and 7b shaped according to the embodiment of the present invention. The upper and lower ends 42 and 44 of the pipe bush surface 40 of the trailing arm pipes 7a and 7b have a half moon shape by the shell cutting method of the trailing arm bush surface processing apparatus according to the embodiment of the present invention. It was processed all at once. Since the shell cutter for cutting the bush surface 40 is a dedicated milling cutter, it is easy to cut the half moon shape of the bush surface, and because the upper and lower ends 42 and 44 of the bush surface 40 are cut at the same position, there is no upper and lower cross-sectional dimension distribution. It is stable. Since the traveling speed of the slide fed to the shell cutter that is rotated at a high speed can be controlled (slowly controlled), the burr at the time of cutting the bush surface is substantially removed. In addition, the bushing surface 40 of the trailing arm pipes 7a and 7b processed according to the embodiment of the present invention uses a clamping unit to press-fix and simultaneously rotate the trailing arm pipe, thereby forcibly disregarding the conventional product thickness. Product lifting caused by the punching is removed.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Although the embodiment of the present invention has described the trailing arm bushing as an example, it is possible to process other necessary products by changing the jig of the clamping unit to the desired product type. Self-evident Since the jig and clamp of the clamp fixing unit are fastened to be detachable, changing the jig and clamp can be used as a processing device for processing other desired products. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined by the equivalent of claims and claims.

As described above, according to the present invention, the trailing arm processing apparatus for the vehicle rear suspension implements automatic operation to increase product productivity, and simultaneously process the bushing surface of the trailing arm pipe. In addition, the present invention prevents unstable dimensional distribution during the trailing arm pipe bush surface processing and has a trailing arm pipe bush surface has a precise dimension processing and a beautiful appearance.

Claims (10)

In the trailing arm processing apparatus, A cutting drive unit which is installed on the frame and cuts the upper and lower ends of the bushing surface of the trailing arm pipe to be processed at a high speed in a half moon shape at once by a shell cutter of shell cutting method; And a clamp for fixing the jig to which the trailing arm pipe to be processed and the pipe are mounted, and pressing and fixing the trailing arm pipe to be seated on the jig by the predetermined vertical lowering and raising control with the clamp. And a clamping unit for releasing and A slide feed unit for horizontally forwarding and backward conveying a clamp fixing unit that press-fixes the trailing arm pipe to be machined to be cut by the cutting drive unit so that the bushing surface of the trailing arm pipe to be machined can be cut by the predetermined control. Wow, A user interface unit for interfacing with the user, Electronic control unit for driving control of the drive motor of the cutting drive unit, the lowering and raising of the clamp of the clamp fixing unit, the horizontal forward feed and the backward feed control for the slide feed unit by the user's request through the user interface unit Trailing arm processing apparatus characterized by consisting of. The method of claim 1, The clamp fixing unit and the slide conveying unit are respectively installed on the main frame symmetrically about the cutting drive unit, and the left clamp fixing unit and the left slide conveying unit are independent of the right clamp fixing unit and the right slide conveying unit. Trailing arm processing equipment, characterized by the ability to operate. The method of claim 1 or 2, wherein the clamp fixing unit, A jig having a product mounting portion on which the trailing arm pipe to be machined can be mounted; A clamp for pressing and fixing the trailing arm pipe to be seated mounted on the product seating part; The trailing arm processing apparatus, characterized in that configured as a clamp drive for driving the clamp to be vertically lowered and vertically raised by a predetermined control. The method of claim 3, wherein the clamp drive unit, Each of the clamps has first and second hydraulic cylinders corresponding to the first and second clamps, and guide slides are provided before and after the first and second hydraulic cylinders, respectively. A guide slide is mounted to the first clamp through a clamp fixing unit frame, the second hydraulic cylinder and a corresponding front and rear guide slide are mounted to the second clamp through the clamp fixing unit frame, and the first and second hydraulic And a cylinder drives the first and second clamps vertically lowered and vertically raised by hydraulic pressure. According to claim 1 or 2, wherein the slide transfer unit, A slide table for conveying the clamping unit forward and backward in a horizontal direction; A trailing arm processing apparatus, characterized in that configured as a slide feed control device for controlling the horizontal forward and backward transfer of the slide table. 6. The slide table according to claim 5, wherein the slide table comprises a slide rail fastened to the main frame of the trailing arm processing apparatus by a bolt and mounted on the slide rail to be moved forward and backward in the horizontal direction. And a lower portion of the slide bed is fastened and fixed to the jig base of the clamp fixing unit, and has a feed rate controller for allowing a user to adjust the feed rate. The process control stopper according to claim 5, wherein the slide feed control device is fixedly fastened to the left end of the slide hydraulic cylinder extending from the slide table and the slide forward limit switch device for adjusting the work amount to detect the slide feed limit. When the slide table is advanced in the horizontal direction to the slide transfer limit position, the processing control stopper is in contact with the slide forward limit switch device so that the slide forward limiter switch device to detect the slide transfer limit Trailing arm processing equipment. According to claim 1 or 2, wherein the cutting drive unit, Cutting drive motor, A pulley for transmitting power of the cutting drive motor; A cutting drive unit spindle for transmitting power from the pulley; And a cutting head having four shell cutters rotated by receiving power from the cutting drive unit main shaft and slightly twisted at an angle of several degrees in the circumferential axis direction. The trailing arm processing apparatus of claim 8, wherein each of the four shell cutters of the cutting head is provided with a plurality of insert chips for milling cutting. A cutting drive unit for rotationally cutting the bushing upper and lower ends of the trailing arm pipe to be machined in a half moon shape, a jig in which the trailing arm pipe to be machined can be seated, and a clamp for fixing the pipe; And a clamp fixing unit for raising, and a slide conveying unit for horizontally forwarding and backward conveying the clamp fixing unit. Rotating the shell cutter of the cutting drive unit at a high speed by driving the cutting drive unit according to an automatic machining request of the user who has mounted the trailing arm pipe to be machined on the product seating part of the jig; Vertically lowering the clamp of the clamp fixing unit to press-fix the trailing arm pipe to be mounted on the jig; A process of horizontally forwarding the clamp fixing unit holding the trailing arm pipe to be machined horizontally by using the slide transfer unit so that the upper and lower bush faces of the pressing fixed trailing arm pipe are simultaneously cut by the rotating shell cutter. and, Stopping driving of the cutting drive unit as the upper and lower cutting edges of the bush surface are completed; Trailing arm of the clamp fixing unit by using the slide transfer unit and the trailing arm processing method comprising the step of vertically raising the clamp of the clamping unit.