JP2000158190A - Method and device for manufacturing suspension member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve welding finish accuracy by welding a main body and attachment parts with a reference face at the attachment parts as a welding reference position after the attachment parts are attached to a hollow aluminum alloy extrusion shape material main body. SOLUTION: A transverse link 10 comprises a main body 11 obtained by bending an aluminum alloy angular pipe having a hollow part 11c, a first chassis side attachment part 12, a wheel side attachment part 16, and a second chassis side attachment part 18. Insertion parts of the attachment parts 12 and 16 are inserted in opening parts 11a on both ends of the main body 11. Bottom faces of the attachments parts 12 and 16 are put on top faces of support parts 4 and 6 on a base 2, and then pins 3 and 5 are inserted in each through hole. A concave part of a fixed part 17 is engaged in a side face 11b of the main body 11 to attach the attachment part 18. The pin 7 of the support part 8 is inserted in the through hole, and a reference face K3 is brought into face contact with a support face S3. With welding torches 9 and 9a, rectangular weldings W1 and W2 are surely applied along a groove formed by a concave groove 14, and also welding W3 is applied along an outside face of the fixed part 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a suspension member such as a transverse link having a main body curved along a longitudinal direction and a manufacturing apparatus used for the method.

[0002]

2. Description of the Related Art As shown in FIGS. 7A and 7B, a member used for a vehicle suspension, for example, a transverse link 52, comprises a main body 54 composed of a square pipe that is slightly curved in plan view, and a main body 54. Openings 56, 57 at both longitudinal ends of
And the entire circumference is welded W1,
The first vehicle-body-side mounting part 58 and the wheel-side mounting part 60 having W2, and the second vehicle-body-side mounting part 64 having a pair of upper and lower curved welds W3 on the curved and protruding side surface 55 of the main body 54. Have. Each of the welds W1, W2, W3 is located in the same plane or in one curved surface, but is located in planes at different angles from each other.

Accordingly, in order to weld the welded portions W1, W2, and W3, arc welding and the like are sequentially performed individually with the components 58, 60, and 64 set on the main body 54. For this reason, the finishing accuracy of the welded portions W1, W2, W3 is likely to vary, and furthermore, a large number of labors are required for the entire welding man-hour and the pre-setting and post-removal and re-setting, resulting in an increase in cost. there were. That is, the individual parts 58, 60,
It is possible to weld with high accuracy at the welded portions W1, W2, W3 between the main body 64 and the main body 54.
In a state in which the main bodies 54 and 60 are welded, deformation of the main body 54 itself occurs, and the accuracy of the final finish includes variations, so that there is a problem that the accuracy is not very high.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and provides a suspension member in which each welding portion is located in different planes with a stable welding quality and a small amount of labor. An object of the present invention is to provide a method of manufacturing a suspension member that can be welded with high precision at a low cost, and a manufacturing apparatus used for the method.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method of welding a plurality of attachment parts to be welded to a suspension member to a main body with a reference surface serving as a welding reference position, and The present invention is based on the idea that welding is performed using a base that fixes a plurality of support portions having a reference surface as a welding reference position on a surface. That is, the method for manufacturing a suspension member according to the present invention comprises a main body having a hollow portion made of an extruded aluminum material and a hollow or extruded member made of an aluminum alloy and inserted into the hollow portion of the main body. A method for manufacturing a member for suspension including an insertion portion, and a wheel-side or vehicle-body-side mounting part welded to both longitudinal ends of the main body, after assembling each mounting part to the main body, The main body and each mounting part are welded with the reference surface of each mounting part as a welding reference position. According to this method, since the reference surface of each mounting part is set as a welding reference position, each mounting part and the main body are assembled, and welding is performed in a state where the insertion part of each mounting part is inserted into the hollow part of the main body. With a simple operation, each mounting part can be welded to the main body with high finishing accuracy while holding their reference surfaces at accurate welding reference positions.

[0006] The present invention also includes a method of manufacturing a suspension member, wherein the suspension member further has another wheel-side or vehicle-body-side mounting part welded to a curved projecting side surface of the main body. According to this, for example, it is possible to obtain the transverse link by welding with high finishing accuracy. Further, in each of the mounting components, a groove is formed outside the insertion portion inserted into the hollow portion of the main body, and the groove forms a groove near both longitudinal ends of the main body at the time of the welding. The manufacturing method of the member is also included. Accordingly, it is possible to insert the insertion portion of each attachment component into the hollow portion of the main body, and at the same time, easily perform welding by utilizing the concave groove as a groove.

On the other hand, an apparatus for manufacturing a suspension member according to the present invention comprises a body made of an aluminum alloy extruded profile and a hollow material curved along the longitudinal direction, and an aluminum alloy extruded profile or forged material. A wheel-side or vehicle-body-side mounting part welded to both longitudinal ends of the main body, having an insertion portion inserted into the hollow portion of the main body, and the same extruded shape or forged material as described above; A device for manufacturing a suspension member including a wheel-side or vehicle-body-side attachment part welded to a side surface protruding, and wherein a horizontal surface and a vertical surface supporting a reference surface of each of the attachment parts at a predetermined position as a welding reference position are provided. Or a plurality of support portions having inclined support surfaces, a base having these support portions fixed on the surface, and welding means such as a welding torch for welding between the main body and each component. It includes, characterized in that.

According to this device, for example, a wheel-side or vehicle-body-side mounting component can be accurately mounted on both ends of a curved main body such as a transverse link, and a vehicle-body-side mounting component can be accurately mounted on a curved side surface. Welding with each part can be performed accurately with required strength and finishing accuracy. Therefore,
The suspension member such as the link can be easily and quickly manufactured. In addition, an extruded or forged material made of an aluminum alloy can be used for each of the above-mentioned attachment parts by forming such as cutting or drilling.

[0009] A distance (h) between the support reference surface of the support portion and the base surface is larger than a length (L) into which the entire length of the welding torch can be inserted and which can move in the width direction. Manufacturing equipment is also included. According to this,
For example, attachment parts to be welded at both ends of each link main body can be reliably welded in the same posture or all postures along the entire periphery of the opening in the end surface of the main body.
At the time of this welding, a welding means capable of bending at least a supporting portion of the torch is used for a welding portion close to the surface of the base.

[0010] The present invention also includes an apparatus for manufacturing a suspension member, in which a straight and / or curved long hole through which the welding torch can be inserted and moved is formed near each support portion of the base. According to this, for example, the attachment parts to be welded at both ends of each link body along the entire periphery of the opening at both ends of the body, and the attachment parts to be welded in the middle of the body by the same long welding torch, have the same posture. Alternatively, welding in all positions can be easily and reliably performed.

The width (W) of the slot is defined as the thickness (t) of the base, the distance (h) between the support surface of the support portion and the base surface, the diameter (D) of the welding torch, And an apparatus for manufacturing a suspension member that satisfies the following expression 2 between the torch and the inclination angle (θ) with respect to a plane perpendicular to the base surface.

[0012]

W> tan θ (h + t) + D / cos θ

[0013] According to this, it is possible to reliably perform the welding in the same position or in all positions described above at all necessary welding points. If W in the above equation 2 is less than the total value of the entire right side, contact of the welding torch with the support portion, displacement of the welding position, poor welding, etc. are likely to occur, and it becomes difficult to maintain proper welding. Was excluded.

Further, a rotating means for rotating the base in two directions orthogonal to each other, and a moving means for moving the welding torch along the X, Y, and Z axes while maintaining its posture. The provided apparatus for manufacturing a suspension member is also included. According to this, for example, the welding torch can be easily and accurately welded in a downward posture to each welding portion between the main body set on the base and each mounting part while maintaining the downward posture. In addition, a continuous downward welding can be performed.

[0015] The present invention also includes an apparatus for manufacturing a suspension member, wherein the welding means is further provided with correction means such as a sensor for correcting the tip of the welding torch to a position within ± 1 mm from a position to be welded. According to this, it is possible to more accurately and reliably perform welding in the downward posture while keeping the posture of the torch constant. If the correction range of the correction means such as the sensor exceeds ± 1 mm, the welded portion formed between the main body and each mounting part starts to be inaccurate, and it becomes impossible to weld both parts with sufficient strength. This has been excluded due to fear.

[0016] In addition, the suspension member may be configured such that the suspension member includes the main body, the wheel-side or vehicle-body-side attachment parts welded to both longitudinal ends of the main body, and a curved projecting side surface of the main body. And a suspension link manufacturing apparatus which is a transverse link or a suspension arm having the wheel-side or vehicle-body-side attachment part welded to the vehicle. This makes it possible to easily and accurately set the respective mounting members to the main body, and to easily and quickly provide a welded part having a high finishing accuracy and the above-mentioned lightweight link or arm having a required strength by the welding. .

[0017]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1A shows a manufacturing apparatus 1 of the present invention, which includes a rectangular base 2 and a plurality of support portions 4, 6, 8 fixed at predetermined positions on the surface of the base. The support portions 4, 6 are support surfaces S1, S2 whose cylindrical upper surfaces are horizontal, and pins 3, 5 are erected at the center thereof. The left side surface of the support portion 8 is a support surface S3 in the drawing, and the pin 7 projects horizontally above the support surface S3.

As shown in FIG. 1 (B), the supporting parts 4, 6, 8 on the base 2 of the manufacturing apparatus 1 are provided with respective mounting parts 12,
It is in the position corresponding to 16,18. That is, the reference surface K1 which is the bottom surface of the first vehicle-body-side attachment component 12 is supported by the support surface S1 of the support portion 4, and the pin 3 located at the center of the support surface S1 is located in the through hole 13a of the attachment component 12. enter in. Also,
The reference surface K2 which is the bottom surface of the wheel-side mounting component 16 is
The pin 5 supported by the support surface S2 and located at the center of the support surface S2 enters the through hole 15a of the mounting component 16.
Further, the reference surface K3, which is the right side surface of the second vehicle body-side mounting component 18, comes into surface contact with the left side surface (supporting surface) S3 of the support portion 8, and the pin 7 projecting horizontally from the support surface S3 is mounted on the mounting component 18. Into the through hole 19a. Pins 3 and 5 or pin 7
May be attached to each of the supporting portions 4, 6, 8 so as to be freely retractable.

As shown in FIG. 1B, the curved main body 11 of the transverse link 10 and the mounting parts 12,
16 and a pair of upper and lower curved welds W3 are applied between the main body 11 and the mounting part 18. A torch 9 for MIG welding is used for each of the weldings W1 to W3. When performing manual welding, each welding position does not become the same direction unless the position of the base 2 is changed. However, at least for the welded portion adjacent to the surface of the base 2, whether the base side 9b in the drawing is curved. Alternatively, a flexible welding torch 9a is used. Each welding torch 9, 9a is used by the operator for welding W1 to W3 at each welding portion, and is fixed to a moving means to be described later, and the link 10 including the base 2 is fixed to a fixed posture to be different from each other. The weldings W1 to W3 can also be performed by rotating in the directions.

FIG. 2A shows a state where a part of the transverse link 10 is disassembled. The link 10 is made of an extruded member made of an aluminum alloy, and has a main body 11 formed by bending a rectangular pipe having a hollow portion 11c into a curved shape by a bender (not shown) or the like, and an insertion portion inserted into each opening 11a at both ends of the hollow portion 11c. The first vehicle-body-side mounting component 12, the wheel-side mounting component 16, and the main body 11 to which welding W1 and W2 are inserted by inserting 14a.
And the second vehicle-body-side attachment part 18 that is welded W3 to the curved and protruding side surface 11b. The mounting parts 12, 16
Have concave grooves 14 having a substantially V-shaped cross section on four sides outside (closer to the tip) of the insertion portion 14a, and ring portions 13, 1 on the tip side.
5 is provided with through holes 13a and 15a. The above groove 1
No. 4 functions as a groove at the time of welding.

The mounting part 18 has a fixing part 17 having a shallow recess 17a following the side surface 11b of the main body 11.
And a ring portion 19 having a through hole 19a penetrating horizontally at the center. Each mounting part 12, 16, 1
8 was finished by subjecting an aluminum alloy to hot or cold forging and forming, and further performing a cutting process or a punching process on the formed product or an extruded aluminum alloy extruded separately. Things.

Then, with the insertion portions 14a of the attachment parts 12, 16 inserted into the openings 11a at both ends of the main body 11,
As shown in FIG. 1B, on the upper surface (support surface S1, S2) of each support portion 4, 6 on the base 2, each mounting component 12,
16 are placed on the bottom surface (reference surfaces K1, K2), and each through hole 1
Insert the pins 3 and 5 into the pins 3a and 15a. Further, the mounting component 18 is assembled by fitting the concave portion 17a of the fixing portion 17 to the side surface 11b of the main body 11, and supporting the mounting component 18 with the through hole 19a.
The right side of the ring 19 (reference plane K3).
Is brought into surface contact with the left side surface (support surface S3) of the support portion 8. In this state, using the welding torches 9, 9a, a pair of upper and lower curved welds W3 along the outer surface of the fixing portion 17 and a rectangular weld W1, W2 along the groove formed by the concave groove 14 are formed. It can be applied reliably with high finishing accuracy.

Therefore, the manufacturing apparatus 1 can manufacture the transverse link 10 having a predetermined shape and dimensions with low labor and low cost. In addition, when the above-mentioned welding W1 to W3 is performed and the vicinity thereof is cooled at a cooling rate of 20 ° C./min or more, and then aging treatment is performed in the vicinity of each welded portion, it is possible to prevent a decrease in strength due to welding, and it is possible to stabilize. A link 10 having strength can be obtained. FIG.
(B) is an enlarged front view of the mounting part 12, which is obtained by cutting an aluminum alloy extruded profile having a cross-sectional shape as shown in the drawing at a predetermined width orthogonal to the extrusion direction, and then forming approximately V on the upper and lower surfaces in the figure. It is formed by forming a U-shaped concave groove 14 and chamfering necessary portions. Further, the attachment part 16 is formed in the same manner.

FIG. 2C relates to a transverse link 10 ′ which is a modification of the link 10. That is, the link 10 'is formed by bending the right end side of the curved main body 11' in the drawing over a predetermined length and bending slightly upward to form an oblique portion 11c. The insertion part 14a of the side attachment part 16 is inserted obliquely, and a rectangular welding W2 inclined along the groove 14 adjacent thereto is applied. The welding W2 is in the form of fillet welding,
The welding operation can be further facilitated by the presence of the groove formed by the groove.

FIG. 3A shows a manufacturing apparatus 1 'used for assembling the link 10'. The difference from the manufacturing apparatus 1 is that the upper surface (support surface S2) of the support portion 6 ', which is located on the right rear side in the drawing, among the support portions 4, 6, 8 fixed on the base 2.
Are inclined at the same angle as the bottom surface (reference surface K2) of the mounting component 16. In addition, the upper surface of the pin 5 'standing upright at the center of the upper surface S2 of the support portion 6' is also inclined.
Each of the mounting parts 12, 16, 18 is previously assembled to both ends of the main body 11 ', and as shown in FIG. 3B, each mounting part is mounted on each of the supporting parts 4, 6' on the base 2 of the manufacturing apparatus 1 '. Parts 12,1
6, and the pins 3, 5 'are inserted into the through holes 13a, 15a.

A concave portion 17 is provided on the side surface 11b of the main body 11 '.
The pin 7 of the support portion 8 is inserted into the through hole 19a of the mounting component 18 into which the
3) is brought into contact with the left side surface (support surface S3) of the support portion 8. In this state, using the welding torches 9, 9a, each groove 1 is used.
4 and a pair of upper and lower weldings W3 along the outer surface of the fixing portion 17 can be accurately and reliably performed. Therefore, with the manufacturing apparatus 1 ', the transverse link 10' having a predetermined shape and dimensions can be manufactured accurately with little labor and low cost.

FIG. 4A relates to welding W1 between the main body 11 of the link 10 and the mounting part 12 in the manufacturing apparatus 1. A groove 14 is made adjacent to the groove 11 along the opening 11a on the end face of the main body 11, and a welding W1 is applied to the groove (groove) 14 on the upper side and both sides by the welding torch 9. However, it is difficult to insert the torch 9 into a lower welding portion close to the surface of the base 2. Therefore, as shown in FIG.
A short welding torch 9a having b or a curved welding torch (not shown) is used. At this time, the height (interval) h from the surface of the base 2 to the upper surface (support surface S1) of the support portion 4 is:
The entire length of the welding torch 9a is horizontal between the surface of the base 2 and the main body 11 and the mounting part 12 while maintaining the upward posture.
It is necessary that the height (length) L is always larger than the height (length) L that can be moved in the (width) direction. This makes it possible to easily perform the welding W1 along the base 2 side. The above-mentioned relationship of h> L is the same for the welding W2 to be performed on the lower side of the mounting component 16 close to the surface of the base 2.

FIGS. 4 (B) and 4 (C) show the main body 11 of the link 10 and the mounting part 12 with only a linear welding torch 9 without a flexible part or using a curved welding torch.
The figure shows a mode that enables welding W1. In this case, a linear long hole 2a parallel to the end face of the main body 11 and the horizontal concave groove (groove) 14 in the attachment part 12 is formed obliquely leftward from the near side of the base 2 in the drawing. I have. still,
One end of the long hole 2a does not necessarily need to be opened on the side in front of the base 2. As shown in FIG. 4 (B), the insertion portion 14a of the attachment component 12 is inserted into the opening 11a at one end of the main body 11 in advance, and is inserted along the rectangular concave groove (groove) 14 adjacent to the opening 11a. Then, the welding torch 9 is moved while maintaining a predetermined posture and distance to perform welding W1. At this time, the welding W1 is applied to the welded portion on the bottom surface (reference surface K1) side of the attachment part 12 by the torch 9 which moves horizontally while penetrating the elongated hole 2a slightly inclined as shown in the figure.

When performing such welding W1, FIG. 4 (B) and FIG.
As shown in (C), the width of the long hole 2a is W, the thickness of the base 2 is t, and the upper surface of the support 4 from the surface of the base 2 (support surface S
The height (interval) up to 1) is h, the diameter of the welding torch 9 is D, and the inclination angle θ of the torch 9 with respect to a plane perpendicular to the surface of the base 2.
, The width W of the slot 2a needs to satisfy the relationship shown in the following Expression 3.

[0030]

W> tanθ (h + t) + D / cosθ

That is, the width W of the elongated hole 2 a is defined as the length in the vertical direction from the bottom surface of the base 2 to the upper surface (reference surface S 1) of the support portion 4.
The horizontal length (tan θ (h + t)) when the inclination angle of the torch 9 with respect to (t + h) is θ, and the horizontal direction of the torch 9 when the diameter of the torch 9 is D and the inclination angle is θ Is always set to be larger than the total value of the length (D / cos θ). As a result, the welding torch 9 can move smoothly in the elongated hole 2a, and the torch 9
A high quality weld W1 can be formed on the welded portion on the bottom surface (reference surface K1) side of No. 2.

The torch 9 can be moved even when the width W of the long hole 2a is equal to the right side of the equation (3). However, when the inclination angle θ is large, the edge of the torch 9 and the edge of the long hole 2a interfere with each other. At the time of movement, the peripheral surface of the torch 9 may be rubbed, or the tip of the torch 9 may be displaced from the groove formed by the concave groove 14 and begin to cause poor welding. Therefore, it is desirable that the width W of the long hole 2a always satisfies the relationship of Expression 3. Further, as shown in the base 2 in FIG. 5 described below, a linear elongated hole parallel to the concave groove (groove) 14 on the bottom surface of the attachment part 16 to be welded W2 to the other end of the main body 11 of the link 10. 2b
To the base 2 or the side surface 11b of the main body 11
A parallel curved long hole 2c may be formed in the base 2 along the fixing portion 17 of the mounting part 18 to be welded W3. At this time, it is desirable that the widths of the long holes 2b and 2c also satisfy the relationship based on the above-described formula (3).

FIG. 5 shows an apparatus 50 for manufacturing a suspension member in a different form. That is, the device 50 is a base 2 having the support portions 4, 6, 8 and the slots 2a, 2b, 2c.
A rotating shaft 36 that supports the base 2 at the center of its bottom surface and rotates the base 2 in the horizontal direction, and a concave groove 34 that receives the base of the rotating shaft 36 near the front end, and supports the base 2 rotatably in the vertical direction. Rotating device having horizontal arm 32
(Means) 30 and a moving device (means) 20 for moving the welding torch 9 shown in the center of the figure in a three-dimensional axial direction while maintaining the posture downward.

With the welding torch 9 in the downward position, the moving device 20 is driven by a vertical screw 22, a cylindrical body 23 screwed to the screw 22 and an integral part of the torch 9, and a motor M 1 for rotating the screw 22. The torch 9 is moved up and down (Z axis). Further, the welding torch 9 is turned right and left in the figure together with the cylindrical body 24 by the rectangular cylindrical body 24 integrated with the torch 9, the horizontal screw 25 screwed thereto and the motor M <b> 2 rotating the screw 25 by a worm gear (not shown). Move horizontally (Y-axis direction). A slider 28 for supporting the proximal end of the screw 25, a box 27 for slidably supporting the slider 28,
A screw 26 that rotates in the box 27 by a motor M3 fixed to one end wall thereof and is screwed with the bottom of the slider 28
Thereby, the slider 28 can be moved together with the torch 9 in the horizontal (X-axis) direction, which is the front and rear direction in the figure.

Reference numeral 21 in FIG. 5 is a sensor attached near the welding torch 9 and installed to correct the position of the welding wire at the tip to a predetermined position of ± 1 mm or less. Reference numeral 29 denotes a wire reel for sequentially feeding a welding wire to the welding torch 9. Further, the cable 44 supplies a predetermined welding current from the welding power supply 40 to the torch 9. The control box denoted by reference numeral 49 in FIG.
The welding torch 9 is moved along the X, Y, and Z axes by the moving device 20 via the cable 48, and is stopped at a predetermined position. Moreover, the control box 49 includes the cables 42, 4
4, a voltage and a current necessary for welding are instructed to a power supply device 40, and the rotating device 30 is connected to the rotating device 30 through a cable 38.
An instruction to rotate the base 2 having the surfaces 16 and 18 set on the surface at an arbitrary angle along the horizontal or vertical direction is also issued.

For example, in the state shown in FIG. 5, the moving device 20 is driven to move the welding torch 9 parallel to the left and right horizontal (Y-axis) directions so as to be positioned directly above the base 2, and the torch 9 is further moved. By moving the link 10 in the horizontal (X / Y-axis) directions in the left-right and front-rear directions, the concave groove 14 exposed on the upper side between the main body 11 of the link 10 on the base 2 and each of the mounting parts 12, 16, 18. Along with the welding W1, W2, W3
Can be applied. Next, when the base 2 is rotated 90 degrees in the vertical direction by the rotating device 30, as shown in FIG. 6A, the base 2 and the main body 1 of the link 10 on the surface thereof are rotated.
1st mag is in a vertical position. In this state, the welding device 9 is once lowered in the vertical (Z-axis) direction by the moving device 20. Further, by moving the welding torch 9 in the horizontal (Y-axis) direction and rotating the rotating shaft 36 appropriately, the concave groove 14 located on the upper side in the drawing between the main body 11 and each of the mounting parts 12, 16, 18 is shown. Along, the welding W1, W2, W3 can be performed. In this case, welding W1 and W2 can be performed along the concave grooves 14 on both side surfaces of the attachment parts 12 and 16.

Then, from the state shown in FIG.
When the base 2 is further rotated by 90 degrees along the vertical direction, the base 2 is in a horizontal posture with the back surface facing upward, as shown in FIG. Etc. are located. In this case, the concave groove 14 close to the surface of the base 2 between the main body and each of the components 12, 16, 18 is exposed upward from each of the long holes 2a, 2b, 2c provided in the base 2. In this state, the welding torch 9 is moved by the moving device 20.
Is once lowered in the vertical (Z-axis) direction. Further, by moving the welding torch 9 in the horizontal (X / Y axis) direction and rotating the rotating shaft 36 appropriately, the main body 11 and each of the mounting parts 12, 1 are rotated.
The welding W1, W2, W3 can be performed along the concave groove 14 located in each of the long holes 2a, 2b, 2c between 6,6. By simultaneously performing the movement along the X, Y, and Z-axis directions by the moving device 20 and the rotating and tilting operations by the rotating device 30, the welding parts 12, 16, and 18 are welded to the main body 11 in a continuous downward posture. , W2, W3.

Further, since the position of the welding wire at the tip of the welding torch 9 is always detected by the sensor 21, when the tip of the welding wire is shifted to a position exceeding ± 1 mm with respect to the center of the concave groove 14, for example. Transmits the fact from the sensor 21 to the control device 49. Then, the control device 49 follows the program stored in the control device 49, and
For 0, correction is instructed to move the torch 9 to the correct welding position. Thereby, more accurate and stable welding W1, W2, W3 of quality can be performed. The sensor 21 may be, for example, a position measuring sensor such as an infrared sensor. Alternatively, the welding position may be corrected by capturing an image of the welded portion using a CCD camera.

As described above, according to the manufacturing apparatus 50, the main body 11 of the transverse link 10 and the mounting parts 12, 16, 18 are accurately positioned on the surface of the base 2 by the support portions 4, 6, 8. The rotation of the base 2 along the vertical and horizontal directions by the rotating device 30 and the X by the moving device 20 while maintaining the welding torch 9 in the vertical position.
-It can be translated in the Y and Z axis directions. Therefore,
The welding W1, W2, W3 between the main body 11 and each of the mounting parts 12, 16, 18 can be stably performed with good welding quality, and the control operation on the control device 49 can be performed with a small amount of labor. This makes it easy and fast to manufacture low-cost, accurate welding suspension members without programming and inputting enormous and complicated control items according to the suspension members to be welded, such as automatic welding robots. It is possible to do.

The present invention is not limited to the embodiments described above. For example, in the above-described manufacturing apparatus 50, the base 2 is replaced with an apparatus having a support portion 6 'having an inclined upper surface (support surface S2) of the manufacturing apparatus 1', and the mounting component 16 inclined with respect to the surface of the base 2 is replaced. It is also apparent that the link 10 'having the above can be manufactured by welding W1, W2, W3. The support portions 4, 6, and 8 fixed to the surface of the base 2 are formed, for example, in a large-diameter through hole formed in the base 2 so that the position to be fixed to the base 2 can be adjusted according to a member to be welded. On the other hand, a bolt having a small diameter can be screwed into each of the support portions 4, 6, 8 from the back surface side of the base 2 to fix the position. In this case, the support portion 6 is placed on its upper surface (support surface S
2) can be replaced by the inclined support portion 6 '.

Further, the suspension member to be manufactured by welding is a transverse link, a lower link,
Upper links, lower arms, tension rods and the like are also included. In short, it is only necessary that the rod-shaped main body is curved and at least the welded portions of the mounting parts to be welded to both ends thereof are located in different planes. The method and the apparatus of the present invention are not limited to assembling all the parts between the main body of the suspension member and the respective mounting parts by welding, but also screwing or riveting other mounting parts if at least two parts are welded. The form of assembling with a stopper is also included. Further, the present invention is also applicable to a mode in which a part of one weld is replaced with a screw or a rivet.

[0042]

According to the manufacturing method of the present invention described above, a plurality of mounting parts are welded to the longitudinal ends and the protruding side surfaces of the curved main body with the reference plane of each part as a welding reference position. Welding can be performed accurately at an accurate position with less labor. Further, according to the manufacturing apparatus of the present invention, a suspension member in which a plurality of welds are located in different planes, such as a transverse link, has good assembly accuracy between its main body and a plurality of mounting parts, and has good welding quality. , And can be easily manufactured at low cost with little labor. Furthermore, according to the manufacturing apparatus of the sixth and seventh aspects, it is possible to reliably perform welding on all the welded portions between the main body of the suspension member and the plurality of attachment parts. Furthermore, according to the manufacturing apparatus of claim 8,
Since the body constituting the suspension member and the base on which the plurality of mounting parts are set on the surface can be rotated in two directions, and the welding torch can be moved along the X, Y, and Z axes while keeping its posture constant. Automatic welding with high accuracy and high quality can be reliably performed at low cost with less control and labor.

[Brief description of the drawings]

FIG. 1A is a perspective view showing one embodiment of a manufacturing apparatus of the present invention, and FIG. 1B is a perspective view showing a state in which a main body of a suspension member and an attachment component are set and welded to the manufacturing apparatus of FIG. FIG.

2A is a partially exploded perspective view of the suspension member shown in FIG. 1B, FIG. 2B is an enlarged front view of one attachment part, and FIG. 2C is a modified form of the member of FIG. The perspective view which shows the member for suspensions of FIG.

3A is a perspective view showing a manufacturing apparatus used for the member shown in FIG. 2B, and FIG. 3B is a state in which the suspension member shown in FIG. 2B is set on the manufacturing apparatus shown in FIG. FIG.

FIG. 4 (A) is a partially enlarged view of the perspective view shown in FIG. 1 (B),
(B) is a partial perspective view showing a base in a different form, (C) is
(B) CC sectional drawing.

FIG. 5 is a perspective view showing a different form of manufacturing apparatus.

6 (A) and 6 (B) are partial perspective views showing respective states in which the manufacturing apparatus of FIG. 5 has changed.

FIGS. 7A and 7B are exploded perspective views or assembled views showing a general transverse link.

[Explanation of symbols]

1, 1 ', 50 Production apparatus 2 Base 2a, 2b, 2c Slot 4, 6, 6', 8 Support 9, 9a ... Welding torch 10, 10 '... Transverse link (suspension member) 11, 11' ... Body 11b ... Side surface 11c ... Hollow portion 12, 16, 18 ... Mounting part 14 ... Groove 14a Insert section 20 Moving device 21 Sensor (correction means) 30 Rotating device K1, K2, K3 Reference surface S1, S2, S3: support surface h: height (interval) L: height (length) t: thickness of base D: thickness of base … Torch diameter W …………… .. Slot width θ …………………. Torch tilt angle W1, W2, W3 ... welding

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hisashi Hori 1-34-1, Kambara, Kambara-cho, Anbara-gun, Shizuoka Prefecture Inside the Nippon Light Metal Co., Ltd. Group Technology Center (72) Inventor Hiroyuki Mochizuki Kambara-cho, Abara-gun, Shizuoka 1-334-1, Nippon Light Metal Co., Ltd. Group Technology Center (72) Inventor Shinya Makita 1-34-1, Kambara-cho, Kambara-cho, Anbara-gun, Shizuoka Prefecture Nippon Light Metal Co., Ltd. Group Technology Center (72) Inventor Sasa Takashi Moto 1-34-1, Kambara, Kambara-cho, Abara-gun, Shizuoka Prefecture Inside the Nippon Light Metal Co., Ltd. Group Technology Center (72) Inventor Tadashi Hakamada 1-34-1, Kambara, Kambara-cho, Abara-gun, Shizuoka Prefecture Nippon Light Metal Corporation Group Technology Inside the center (72) Inventor Harumichi Hino 1-34 Kambara, Kambara-cho, Anbara-gun, Shizuoka No. 1 Nippon Light Metal Co., Ltd. Group technology centers in the F-term (reference) 3D001 AA18 BA01 CA01 DA04 4E081 YC10 YX09 YY11 YY14

Claims (10)

[Claims] A main body having an extruded shape made of an aluminum alloy and having a hollow portion; and an insertion portion made of an extruded shape material or a forged material made of an aluminum alloy and inserted into the hollow portion of the main body, and A method of manufacturing a suspension member including: a wheel-side or vehicle-body-side mounting part welded to both longitudinal ends of a main body; and after assembling each mounting part to the main body, a reference surface of each of the mounting parts is A method for manufacturing a suspension member, comprising: welding a main body and each mounting part as a welding reference position. 2. The suspension member according to claim 1, wherein the suspension member further has another wheel-side or vehicle-body-side mounting part welded to a curved and projecting side surface of the main body. Manufacturing method of the member. 3. In each of the mounting parts, a concave groove is formed outside the insertion portion inserted into the hollow portion of the main body, and the concave groove forms a groove near both longitudinal ends of the main body during the welding. The method for manufacturing a suspension member according to claim 1, wherein: 4. A main body made of a hollow material made of an aluminum alloy extruded shape and curved along the longitudinal direction, and an insertion made of an aluminum alloy extruded shape or forged material inserted into the hollow portion of the main body. And a wheel-side or vehicle-body-side mounting part welded to both longitudinal ends of the main body, and a wheel side made of the same extruded shape or forged material and welded to a curved and projecting side surface of the main body. Or a device for manufacturing a suspension member including a vehicle body-side mounting part, wherein a plurality of supports having a horizontal, vertical, or inclined support surface for supporting a reference surface of each of the mounting parts at a predetermined position as a welding reference position. A member for suspension, comprising: a base, a base on which these support parts are fixed on a surface, and welding means such as a welding torch for welding between the main body and each part. Manufacturing equipment. 5. A distance (h) between the support surface of the support portion and the base surface is larger than a length (L) into which the entire length of the welding torch can be inserted and which can move in the width direction. The apparatus for manufacturing a suspension member according to claim 4. 6. A straight and / or curved long hole, into which said welding torch can be inserted and moved, is formed near each support portion of said base.
The manufacturing apparatus for a suspension member according to any one of the preceding claims. 7. The width (W) of the long hole is the thickness of the base.
(t) the distance between the support surface of the support portion and the base surface
(h), a relationship between the diameter (D) of the welding torch and an inclination angle (θ) of the welding torch with respect to a plane perpendicular to the base surface satisfies the following equation (1). 7. An apparatus for manufacturing a suspension member according to any one of claims 1 to 6. W> tan θ (h + t) + D / cos θ 8. A rotating means for rotating the base in two directions orthogonal to each other, and a moving means for moving the welding torch along X, Y and Z axes while maintaining its posture. 8. The method according to claim 4, wherein
An apparatus for manufacturing a member for suspension according to any one of the above. 9. The apparatus according to claim 4, wherein said welding means further comprises a correction means such as a sensor for correcting the tip of said welding torch to a position within ± 1 mm from a position to be welded. An apparatus for manufacturing a suspension member according to any one of the above. 10. The suspension member comprises: the main body; the wheel-side or vehicle-side mounting parts welded to longitudinal ends of the main body; and the wheel side welded to a curved and projecting side surface of the main body. Or a vehicle-side mounting part, and a transverse link or suspension arm having a suspension arm,
An apparatus for manufacturing a suspension member according to any one of claims 4 to 9, wherein: