JPH11114754A - Welded part machining unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a welded part machining unit that is able to various machining operations by means of using a one-type machining unit, and there is no problem from the viewpoint of equipment cost as well as space secureness, and besides, it is indisputable in terms of support. SOLUTION: This welded part machining unit is featured that a locating pin 16 is inserted into a hole 5 installed in a beam body part in a state that a welded part, whose end plate 2 is attached to a shaft end of this long beam body part 1, is supported on a support plate S and, after it is located by a first clamp means 11 to locate a longitudinal axis (X-axis) directional position of the beam body part 1, when it is clamped by a second clamp means holding a peripheral surface of the end plate 2, the first clamp means 11 is made into a flexible supporting structure of both Y-axis and Z-axis directional positions in relation orthogonal each to the X-axis so as to not to produce any adverse effect to a locational state of the first clamp means 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining apparatus for machining a part assembled by welding (hereinafter referred to as "welded part") such as a torsion beam of an automobile.

[0002]

2. Description of the Related Art Generally, there are various types of welded parts such as finished products and semi-finished products. For example, a torsion beam used in a suspension of an automobile is a semi-finished product welding part in which an end plate is attached to a shaft end of a long beam main body with a predetermined twist angle around the axis of the beam main body. After various machining processes are performed on the end plate of the welded part, finally, a spindle, a connecting arm, and the like are attached to obtain a finished product.

In the case of performing this machining, there is a problem in accuracy if machining is performed on the basis of the rough surface of the welded part. Therefore, conventionally, the reference surface is first machined in the first step and then the next step. , Is machined based on this machined surface.

[0004]

However, such a construction method requires two types of processing jigs, an end face finishing processing jig for the first step and a processing jig to be used in the next step. It is costly and disadvantageous in terms of space.

[0005] Further, when machining a welded part, such as the torsion beam, in which an end plate is attached to a shaft end of a long beam main body with a predetermined twist angle,
The center hole opened in the beam main body is used as a locate hole, a locating pin is inserted here, and after positioning in the longitudinal axis direction of the beam main body, the end plate is clamped against the sheet block. In this case, the locating pin acts as a resistor, so that the end plate does not completely adhere to the seat block, and the support may be insufficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and can perform various types of machining by using one type of processing jig. Another object of the present invention is to provide a machine for machining a welded part which has no problem in terms of space and space, and which is reliably supported.

[0007]

The object of the present invention is achieved by the following means. (1) In a state where a welding part having an end plate attached to a shaft end of a long main body portion is supported on a support plate, a locating pin is pushed into a hole formed at a predetermined position of the main body portion, and the main body portion is pressed. To position the longitudinal axis (X-axis) direction of the
A machining apparatus having a clamp means and a second clamp means for holding an outer peripheral surface of the end plate, wherein the end plate is machined while being clamped by the second clamp means; After the locating pin enters the hole and performs positioning in the X-axis direction, the first clamping means holds the end plate by the second clamping means, so that the Y-axis and the Z-axis are perpendicular to the X-axis. The locating pin is held by a holding mechanism having a flexible support structure in the axial direction, and the entire first clamp means can be angularly displaced around an axis extending in the same direction as the X axis. Machine for welding parts.

(2) The first clamping means is a one-axis guide mechanism capable of moving and displacing the locating pin only in the Y-axis direction, and elastically supports the one-axis guide mechanism so as to restrict axial displacement of the one-axis guide mechanism. Y with elastic support member
A shaft holding mechanism, a one-axis guide mechanism capable of moving and displacing the Y-axis holding mechanism only in the Z-axis direction, and an elastic support member for elastically supporting the one-axis guide mechanism to restrict axial displacement thereof. A welding part machining apparatus, comprising: a Z-axis holding mechanism.

(3) The first clamping means assembles the locate pin, the Y-axis holding mechanism, and the Z-axis holding mechanism so as to be stacked in this order, and rotates the Z-axis holding mechanism about a predetermined fixed axis. An apparatus for machining a welded part, wherein the apparatus is connected to a rotating plate.

(4) The second clamping means includes a sheet block for supporting a corner of the outer peripheral surface of the end plate from two directions along the outer shape of the end plate, and an end facing one surface of the sheet block. Machining of a welding part, comprising: a first pressing member for pressing a plate; and a second pressing member for rotating and pressing the end plate toward the other surface of the seat block. apparatus.

(5) The end plate is attached to a shaft end of the elongated main body by welding with a predetermined twist angle around a longitudinal axis (X axis) of the main body. Equipment for machining welded parts.

(6) The apparatus for machining a welded part, wherein the end plate is stamped and formed by fine blanking.

(7) The apparatus for machining a welded part, wherein the second clamping means has a back support member which abuts on and holds an end face on the side of the main body attached to the end plate.

[0014]

According to the first aspect of the present invention, if there is a deviation in the positional relationship between the hole of the welded part and the end plate, a locating pin is inserted into the hole of the main body, and after positioning in the X-axis direction,
When the end plate is pressurized and held by the second clamp means, the entire welding component is displaced by this pressing force, but the position in the Y-axis and Z-axis directions is a flexible support structure and can be angularly displaced around the axis. In the first clamping means configured as described above, not only the displacement but also the angular displacement can be absorbed, and the support of the welded part is ensured. Further, by ensuring the support, desired machining can be performed with only one machining jig without using a plurality of machining jigs, which is advantageous in terms of equipment cost and space.

According to the second aspect of the present invention, since the Y-axis holding mechanism and the Z-axis holding mechanism of the first clamping means are provided with the one-axis guide mechanism and the elastic support member, the movement in the Y- and Z-axis directions is reliably permitted. At the end, it becomes a flexible support that is held elastically, and after being positioned by the first clamping means,
It is easy to absorb an adverse effect such as a shift in the positioning by the first clamp means when the clamp is performed by the second clamp means, and the support of the welded part is more reliable.

According to a third aspect of the present invention, a locating pin is provided.
Since the Y-axis holding mechanism and the Z-axis holding mechanism have a stacked structure, and the Z-axis holding mechanism is connected to the rotating plate, the assembling property of the device is excellent and the angular deviation can be easily absorbed.

According to the fourth aspect of the present invention, if a sheet block for supporting the corner of the end plate is used for the second clamping means, the end plate is pressed against the corner and fixed, so that the support is easy. It is reliable, and the displacement can be easily corrected by pressing.

According to a fifth aspect of the present invention, in the case of a welded part having an end plate attached to the shaft end of the main body with a predetermined torsion angle with respect to the axis, an angular deviation at the time of welding work is provided. Can be absorbed more effectively.

According to a sixth aspect of the present invention, if an end plate obtained by stamping and forming by means of fine blanking is used, positioning can be performed by utilizing the end face of the end plate, and the number of processing jigs can be reduced. This is extremely advantageous in terms of equipment cost and space.

According to a seventh aspect of the present invention, when the second clamping means is provided with a member for supporting an end face on the side opposite to the side on which the end plate is processed, machining of the end face can be performed stably. Processing accuracy is also improved.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a workpiece processed by the welding part machining apparatus according to the present invention, FIG. 2 is a plan view of the workpiece, FIG. 3 is a front view of an end plate of the workpiece, and FIG. FIG. 5 is a schematic front view showing an embodiment of a machined device for welding parts according to the present invention, FIG. 5 is a plan view of the embodiment, FIG. 6 is a sectional view of a main part showing a first clamping means of the embodiment, 7 is a sectional view of a main part showing the second clamping means, and FIG. 8 is a sectional view along line 8-8 in FIG.

First, a workpiece processed by the machining apparatus according to the present embodiment will be described. This work piece is, for example, a semi-finished product of a torsion beam used for an automobile suspension, and is shown in FIGS.
As shown in FIG. 3, a welded part in which the end plate 2 is attached to the shaft end of the long beam main body 1 by welding with a predetermined twist angle θ around the longitudinal axis (X axis) of the beam main body 1 W.

After performing various types of machining on the end plate 2 of the welded part W, the machining apparatus finally ends up with the spindle 3 and the connection shown by a two-dot chain line in FIGS. The finished product is obtained by attaching the arm 4 and the like.

Here, the machining performed variously includes, for example, milling of the front surface 2a or the back surface 2b of the end plate 2, milling of the ABS mounting surface, various hole processing, tapping, and reamer. It is used to include the measurement of the pore diameter.

A general description of the machining apparatus according to the present embodiment for performing such machining is as follows. As shown in FIGS.
In a state where is supported on the support plate S, the workpiece is sent to the processing position by the transfer mechanism 10 including the transfer rod 10b which moves forward and backward by the fluid pressure means 10a, and after the first clamp means 11 performs the positioning in the X-axis direction, It is clamped by two clamping means 31.

In this case, the clamping force of the second clamping means 31 influences the positioning state of the first clamping means 11 via the welding component W, but by absorbing this influence, the welding component W can be reliably held. Establish support. And
The welding part W is machined by the machining center 12.

However, the end plate 2 of the welded part W used in the present embodiment is formed by stamping and forming by fine blanking. Fine blanking is a type of blanking by pressing or the like. Since the material is punched with sufficient restraint, the dimensional accuracy is good, the finished surface is good, there is no curvature or dripping, and an excellent end plate 2 is obtained. Can be

For this reason, since the outer peripheral surface of the end plate 2 has an excellent finished surface so that it can be used as it is for the reference setting, the processing step and the processing jig for the reference setting described above are performed. Is unnecessary, and the entire apparatus is simplified, which is advantageous in cost. In addition, the working accuracy of machining is also excellent in working accuracy.

Further, the apparatus will be specifically described. In this apparatus, a machining center 12 for machining each end plate 2 is installed so as to face a base 13, and the clamping means 11, 31 are provided on a center bed 14 between the machining centers 12. I have.

However, in the present invention, each of the clamping means 11,
The installation position of 31 is not limited to this, and any position or part may be installed between the two machining centers 12.

The first clamping means 11 inserts a locating pin 16 having a pointed conical tip into the center hole 5 formed at a predetermined position of the beam main body 1 to position the position in the X-axis direction. .

The locating pin 16 has a rear end connected to a locating cylinder 17 and is supported in a sleeve 18 so as to be able to advance and retreat toward the center hole 5 by the operation of the locating cylinder 17. The forward end of the locate pin 16 is detected by a limit switch L1, and the backward end is detected by a limit switch L2.

The sleeve 18 is attached to a one-axis guide mechanism G of a Y-axis holding mechanism Hy, which will be described later, attached to a plate 19, and the locate pin 16 is
Is configured to be movable only in the X-axis direction.

The Y-axis holding mechanism Hy is provided with the locate pin 1
6 is held so that it can be slightly displaced only in the Y-axis direction. That is, the Y-axis holding mechanism Hy includes a one-axis guide mechanism G that allows only the Y-axis direction displacement of the entire portion supporting the locate pin 16, and a spring plunger 22 that elastically holds the one-axis guide mechanism G. And a first substrate 24 on which the spring plunger 22 is erected.

The one-axis guide mechanism G includes the sleeve 1
8 is provided. The one-axis guide mechanism G is a publicly-known one, and will not be described in detail. However, the one-axis guide mechanism G has an upper body and a lower body, and the lower body is a rail having grooves formed on both side surfaces extending along the Y axis. The body is constituted by a block provided so as to straddle the rail, and legs protruding from both sides of the block are engaged with grooves of the rail via balls, and the upper body side block is provided. Are configured to be movable and displaced only in the Y-axis direction along the groove of the rail on the lower body side.

The spring plunger 22 is
The plunger is configured to protrude by a spring, and is provided at the front and rear ends of the uniaxial guide mechanism G.

The first substrate 24 is fixed to a rotating plate 23 provided so as to rotate about a fixed axis A. On the first substrate 24, together with the spring plunger 22, there is provided a first substrate 24. The lower body of the shaft guide mechanism G is attached.

Accordingly, the Y-axis holding mechanism Hy has a flexible support structure in the Y-axis direction so that the entire portion supporting the locate pin 16 can be slightly moved and displaced in the Y-axis direction. If the moving plate 23 rotates,
The locating pin 16 can be angularly displaced via the first substrate 24, the Y-axis holding mechanism Hy, and the like.

Below the first substrate 24, there is provided a Z-axis holding mechanism Hz for holding the Y-axis holding mechanism Hy so as to be movable only in the Z-axis direction.

The Z-axis holding mechanism Hz is connected to the first substrate 2
4, a second substrate 2 provided below a predetermined gap m and provided to rotate about the fixed axis A.
5, a T-shaped plate 26 having a horizontal plate 26a fixed to the second substrate 25 and a vertical plate 26b suspended in the Z-axis direction from the center of the horizontal plate 26a; It has a guide mechanism G and a spring plunger 22 provided between the first substrate 24 and the horizontal plate 26a.

It is preferable that the fixed axis A, which is the center of rotation of the entire first clamping means 11, be set at a position essentially other than the X axis.

In the Z-axis holding mechanism Hz, the T-shaped plate 2
6 can be moved and displaced only in the Z-axis direction. The lower end of the vertical plate 26b and the first substrate 24
The spring plunger 22 is also provided between the horizontal plate 26a and the horizontal plate 26a, so that this is also a support structure that is flexible in the Z-axis direction.

The one-axis guide mechanism G of the Z-axis holding mechanism Hz
The lower body is fixedly held at one side to a support plate 27 having a fixed position. The support plate 27 is attached to the fixed plate 19 with a pin or the like. A stopper 28 for restricting the displacement of the horizontal plate 26a is provided so that the device is not adversely affected by the displacement.

Since the locating pin 16, the Y-axis holding mechanism Hy and the Z-axis holding mechanism Hz have a stacked structure as described above, the apparatus can be assembled in a stacked manner, and the jig is excellent in assemblability. Further, since the Z-axis holding mechanism Hz is connected to the rotary plate 23, functionally, it is possible to easily absorb even angular deviation.

Next, as shown in FIGS. 7 and 8, the second clamping means 31 clamps the outer peripheral surface 2c of the end plate 2 formed by the fine blanking. The end plate 2 is pressed toward the seat block 32 provided at a fixed position and one support surface 32a of the seat block 32 so as to support the lower end corner in two directions along the outer shape of the end plate. First pressing member 33
A second pressing member 34 that rotates and presses the end plate 2 toward another supporting surface 32b of the seat block 32, and a case where the front end surface 2a of the end plate 2 is machined. Abuts on the end face 2b of the end plate 2 on the beam body side,
And a back support member 35 for holding this.

However, the back support member 35 is provided on the end plate 2.
Depending on the front-side end surface 2a, the milling process may not always be required, and may not be required.

The first pressure member 33 is provided with a pin P and a long hole 36 so that the position of the tip can be adjusted according to the size of the end plate 2, and is provided in the Z-axis direction by a cam or the like rotated by a motor. You can go back and forth.

The second pressing member 34 presses the end plate 2 from the side by a rod 37 which is configured to move forward and backward using a motor as a driving source. The back support member 35 has a rod 38 which moves forward and backward by the fluid pressure means.

If the second clamping means 31 uses the sheet block 32 configured to support the corner of the end plate 2, the end plate 2 is pressed against the corner and fixed. This is easy and reliable, and the "displacement" in the Y-axis direction and the Z-axis direction that occurs at the time of clamping by the first clamping means 11 can be corrected by pressing and fixing.

Next, the operation of the embodiment will be described. A welding part W is formed by attaching an end plate 2 formed by fine blanking to both axial ends of a long beam main body 1 by welding with a predetermined torsion angle θ with respect to the axis of the beam main body 1. It is manually loaded into the machining equipment.

The welding component W is supported on the support plate S and sent to the processing position by the transport mechanism 10.
After being positioned by the first clamping means 11, the second
It is clamped by the clamping means 31.

In the first clamping means 11, the locate pin 16 moves forward by the drive of the locate cylinder 17, and the conical portion at the tip enters the center hole 5 of the beam main body 1.

In this case, when the position of the center hole 5 and the locating pin 16 are "misaligned", that is, the "misalignment" in the X-axis direction is caused by the force when the locating pin 16 is pushed into the center hole 5, the entire welding part W is displaced. Since it is displaced on the support plate S, it is easily absorbed. At this point, the "shift" in the Y-axis direction and the Z-axis direction does not matter. The first clamping means 11 is for performing positioning for clamping by the second clamping means 31, and the “displacement” in the Y-axis direction and the Z-axis direction is caused by a sheet block at the time when the second clamping means 31 clamps. This is because it is corrected by 32 or the like.

In the second clamping means 31,
The outer peripheral surface 2 c of the fine blanked end plate 2 is pressed by a first pressing member 33 driven by a motor and a second pressing member 34 rotated by a rod 37 driven by a motor, The support surface 32a of the seat block 32,
32b and is fixed.

In this case, the pressing force of the second clamp means 31 is transmitted to the first clamp means 11 via the end plate 2 and the long beam main body 1, and affects the positioning state of the first clamp means 11. Will have an effect.

However, in the present embodiment, the flexible support structure of the Y-axis holding mechanism Hy and the Z-axis holding mechanism Hz surely prevents or absorbs the influence.

That is, for example, when the pressing force of the second clamping means 31 exerts a force for displacing the locate pin 16 in the Y-axis direction, the one-axis guide mechanism G of the Y-axis holding mechanism Hy is displaced. Absorb.

If the pressing force of the second clamping means 31 exerts a force for displacing the locate pin 16 in the Z-axis direction, the one-axis guide mechanism G of the Z-axis holding mechanism Hz displaces and absorbs this. Will do.

Further, when a force is applied to rotate the locate pin 16 around the X axis, the first substrate 24 rotates about the fixed axis A, and the locate pin 16 and the center hole 5 are rotated.
Absorbs power without causing prying or the like.

Therefore, if the locating pin 16 has a flexible support structure in the Y-axis and Z-axis directions and can be angularly displaced around the axis, the second clamping means 31
In addition to the "displacement" and displacement caused by the pressing force, not only the angular displacement but also the angular displacement can be absorbed, so that the support of the welded part W is ensured. Further, by ensuring the support, desired machining can be performed with only one machining jig without using a plurality of machining jigs, which is advantageous in terms of equipment cost and space.

As a result, the clamping force by the second clamping means 31 has no effect on the first clamping means 11, and the welded part W is reliably supported. Then, the apparatus accurately performs mechanical processing such as milling of the front or rear surface of the end plate, milling of the ABS mounting surface, various hole processing, tapping, reamer, and measurement of the hole diameter.

Furthermore, the flexible structure of the present embodiment has both the function of positioning the first clamp means 11 and the effect on the first clamp means 11 caused by the pressing force when the second clamp means 31 clamps. It also works effectively.

That is, the support structure that is flexible in the Y-axis and Z-axis directions, and the function that the entire first clamping means 11 can rotate around the X-axis and adjust the angular position are as follows. Locating pin 16 in center hole 5
At the time of insertion, these elements are effectively displaced as a whole, and have a function of assisting the locate pin 16 to securely enter the center hole 5.

The flexible support structure in the Y-axis and Z-axis directions and the function of adjusting the rotational position are provided when the second clamping means 31 clamps the end plate 2 of the welding component W.
Even if there is an angular shift or a positional shift in the welding component W itself, it is possible to easily eliminate the influence on the clamping state of the first clamping means 11 due to this.

It should be noted that the present invention is not limited to only the above-described embodiments, but can be variously modified within the scope of the claims. For example, in the above embodiment, the welded part is a semi-finished product of the torsion beam, but the present invention is not limited to this, and is a welded part having a hole for locating. The present invention can be applied to various objects as long as they are attached to the end portion.

In the above-described embodiment, the end plate 2 is attached to the shaft end of the long beam main body 1 by welding with a predetermined twist angle θ.
It is needless to say that the present invention is not limited to this, and the twist angle θ may not always be specified.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of a welded part according to the present invention.

FIG. 2 is a plan view of the work piece.

FIG. 3 is a front view of an end plate of the workpiece.

FIG. 4 is a schematic front view showing an embodiment of the present invention.

FIG. 5 is a plan view of the embodiment.

FIG. 6 is a cross-sectional view of a main part showing first clamping means of the embodiment.

FIG. 7 is a sectional view of a main part showing a second clamping means of the embodiment.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main body part, 2 ... End plate, 2a ... Peripheral surface of an end plate, 5 ... Center hole, 11 ... First clamp means, 16 ... Locating pin, 22 ... Spring plunger (elastic support member), 23 ... Rotating plate, 31: second clamping means, 32: sheet block, 33: first pressing member, 34: second pressing member, 35: back support member, G: single-axis guide mechanism, Hy: Y-axis holding mechanism, Hz: Z-axis holding mechanism, S: support plate, W: welded part.

Claims (7)

[Claims] In a state in which a welding part having an end plate attached to a shaft end of a long main body is supported on a support plate, a locating pin is pushed into a hole formed at a predetermined position of the main body, and A first clamping means for positioning a position of the main body in a longitudinal axis (X-axis) direction; and a second clamping means for holding an outer peripheral surface of the end plate, wherein the end is clamped by the second clamping means. In a machining apparatus for performing machining on a plate, the first clamping means may include a locating pin inserted into the hole to perform positioning in the X-axis direction,
When the end plate is held by the clamp means, the locating pin is held by a holding mechanism having a flexible support structure in which the positions in the Y-axis direction and the Z-axis direction, which are perpendicular to the X-axis, respectively, are held, and the first clamp means is used. An apparatus for machining a welded part, characterized in that the whole can be angularly displaced around an X axis or an axis extending in the same direction as the X axis. 2. The first clamp means includes: a one-axis guide mechanism configured to move and displace the locating pin only in the Y-axis direction; and an elastic support for elastically supporting the one-axis guide mechanism to restrict axial displacement. A Y-axis holding mechanism provided with a support member, a one-axis guide mechanism capable of moving and displacing the Y-axis holding mechanism only in the Z-axis direction, and elastically supporting the one-axis guide mechanism to restrict axial displacement thereof. The apparatus according to claim 1, further comprising: a Z-axis holding mechanism provided with an elastic support member. 3. The first clamping means may assemble the locate pin, the Y-axis holding mechanism, and the Z-axis holding mechanism so as to be stacked in this order, and may rotate the Z-axis holding mechanism about a predetermined fixed axis. 3. The apparatus according to claim 2, wherein the apparatus is connected to a rotating plate. 4. A sheet block for supporting a corner portion of an outer peripheral surface of the end plate from two directions along an outer shape of the end plate, and a second end plate facing one surface of the sheet block. And a second pressing member that rotates and presses the end plate toward the other surface of the seat block to press the end plate toward the other surface of the seat block. Machine for machining welded parts as described. 5. The end plate is attached to a shaft end of the elongated main body by welding with a predetermined twist angle around a longitudinal axis (X axis) of the main body. Item 5. A machined device for welding parts according to any one of Items 1 to 4. 6. The apparatus for machining a welded part according to claim 1, wherein the end plate is formed by stamping by fine blanking. 7. The welding part according to claim 4, wherein the second clamping means has a back support member which abuts on and holds an end face on the main body side attached to the end plate. Machining equipment.