JPH11170143A - Manufacture facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and safely convey a heavy workpiece during the manufacture of a vehicle wheel rim or the like. SOLUTION: A plurality of working stations, that is, a rounding station 1A in which a steel strip is rounded so as to form a ring-like member, a butting station 2A for butting opposite ends of the ring-like member against each other, and a welding part 3a for welding opposite ends of the ring member together, a deburring station 4A for removing burrs from the welded part of the ring-like member, and a finishing part 5A for polishing and finishing the welded part, are arranged along an annular main rail 10 in the order of working. The working stations 1A, 2A, 3A, 4A are incorporated respectively with switch-back stages 1B, 2B, 3B, 4B each incorporated with an introduction rail and a delivery rail, respectively. A hoist crane 30 travels on the main rail 10 while it lifts up a workpiece, and then moves through the switch-back stage of each of the working stations so to introduce the delivers workpiece into and from each working station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to equipment for manufacturing, for example, a wheel rim of a vehicle, and more particularly to an improvement in a structure for transferring a work.

[0002]

2. Description of the Related Art A wheel rim of a large vehicle is formed by extruding a strip (work) formed to a predetermined length into an annular shape, and butt-welding both ends thereof to remove burrs at the welded portion. Then, it is manufactured by finish polishing. In the manufacturing process of such a wheel rim, the four processed portions of the rounded portion, the welded portion, the deburring portion, and the finishing portion are arranged in the order of the process along a transport direction of a transport line mainly composed of chutes. . A communication rail of a predetermined height is arranged at a predetermined height between the chute and the processing part, and the work is transported from the chute to the processing part by suspending the work by a hoist crane running on this connection rail. Then, the processed work is returned from the processing section to the chute.

[0003]

However, in the above-described conventional configuration, since the worker places the work on the chute and transports the work by hand, there is a disadvantage that the burden on the worker is large and the production efficiency is low. . In particular, since the wheel rim of a large vehicle is heavy, the drawback is remarkable. Also,
There was a problem in terms of worker safety from handling heavy objects.

[0004]

According to the first aspect of the present invention, there is provided a manufacturing facility, wherein (a) a main rail which draws an annular shape;
(B) a plurality of processing parts arranged in the processing order along the main rail, (c) a delivery rail attached to each processing part, and (d) traveling by passing the main rail while suspending the work. After reaching the rail and processing the work in the processing section, returning to the main rail from the delivery rail while suspending the work, a crane to the next processing section,
It is characterized by having. According to a second aspect of the present invention, in the manufacturing facility according to the first aspect, the main rail has an intermittent portion corresponding to the processing portion, one end of the intermittent portion serving as a carry-in end, and the other end serving as a carry-out end. A moving stage is arranged between the carry-in end and the carry-out end and the delivery rail, and the move stage has a carry-in rail and a carry-out rail. The rail is switched to the loading state where the rail is connected between the loading end of the main rail and the delivery rail, and when the work is unloaded from the processing section, the delivery rail is connected between the loading end of the main rail and the delivery rail. The crane hangs on the loading rail of the moving stage from the loading end of the main rail while suspending the workpiece, and reaches the delivery rail. Characterized in that leading to unloading end of the main rail travels out rail of the moving stage from lowering while transfer rail hanging work.

According to a third aspect of the present invention, in the manufacturing facility according to the second aspect, a first sensor and a second sensor for detecting a crane are provided corresponding to each of the moving stages, and detection signals of these sensors are provided. Control means for switching and controlling the moving stage in response, wherein the first sensor is arranged at an exit end of a carrying-in rail of the moving stage or at a delivery rail, and the second sensor is provided at an outlet end of a carrying-out rail of the moving stage or Located near the exit end of the main rail,
The control means switches the moving stage from the loading state to the unloading state in response to the crane detection by the first sensor, and switches the moving stage to the unloading state in response to the crane detection by the second sensor. , And is switched to the above-described loading state. According to a fourth aspect of the present invention, in the manufacturing facility according to the second or third aspect, the moving stage is provided with a rotation drive unit for rotating the unloading rail, and the unloading rail is provided with a third sensor for detecting a crane. In response to the crane detection by the third sensor, the control means controls the rotation drive unit to rotate the carry-out rail, and connects the outlet end to the carry-out end of the main rail.

According to a fifth aspect of the present invention, in the manufacturing equipment according to any one of the second to fourth aspects, the work is processed between the processing part in the preceding step and the processing part in the subsequent step as necessary. The processing stage in the intermediate process is disposed, and the moving stage corresponding to the processing unit in the previous process has first and second unloading rails, and when unloading the work, the first unloading rail is connected to the delivery rail. It is possible to select one of a first unloading posture and a second unloading posture in which the second unloading rail is connected to the delivery rail, and the main rail is a first unloading rail disposed between the moving stage of the previous process and the intermediate process. A part, a second part arranged between the moving stage of the previous step and the post-step, and a third part arranged between the moving stage of the intermediate step and the post-step,
The moving stage in the preceding step selects the first unloading state and connects the first unloading rail to the first portion of the main rail when the processing unit in the intermediate step does not engage in processing the work, and When the processing unit is involved in processing the work, the second unloading posture is selected to connect the second unloading rail to the second portion of the main rail, and the main rail is directly connected to a moving stage in a subsequent process. And the fourth part is connected to the first and second parts via an auxiliary moving stage.
The auxiliary moving stage has first and second connecting rails, and when the processing section in the intermediate process does not engage in processing of the work, the first connecting rail is connected to the second portion of the main rail. When the processing section in the intermediate step is engaged in processing of the workpiece, the second connecting rail is connected between the third section and the fourth section of the main rail. Is switched to a second state to be connected to.

According to a sixth aspect of the present invention, in the manufacturing facility according to any one of the first to fourth aspects, the plurality of processing portions include a bent portion for rounding the band plate into an annular shape, and both end surfaces of the annular member. And a deburring portion for cutting and removing burrs at the welding location, thereby obtaining a vehicle wheel rim. According to a seventh aspect of the present invention, in the manufacturing facility according to the fifth aspect, the processed portion in the preceding process is a bent portion for rounding the band plate into an annular shape, and the intermediate process includes forming both ends of the annular member. The front end is a flattened portion for joining both end surfaces, the processed portion in the subsequent process is a welded portion for welding both end surfaces of the annular member, and the processed portion in the subsequent process is the above-mentioned welded portion. It is a deburring part for cutting and removing burrs, and is characterized by obtaining a wheel rim for a vehicle. According to an eighth aspect of the present invention, in the manufacturing facility according to the sixth or seventh aspect, a main rail connected to a moving stage corresponding to the deburring section is provided as a finishing section for performing a final polishing of the welding portion. Features.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. Equipment for manufacturing wheel rims
As shown in FIG. 1, a rounding section 1A (a processing section in a previous process) including a machine for rolling a strip (work) called a rim bar material of a predetermined length obtained by extruding steel or the like into a ring shape. A welded portion 3A including a welding machine for performing a flash butt welding on both end surfaces of the annular member (work), and a deburring portion 4A including a machine for removing burrs at a welded portion of the annular portion. (Working part) and a finish 5A for finishing and polishing a welded portion.

When manufacturing a wheel rim having a special shape, it is difficult to perform flash butt welding on both end faces of the annular member. Therefore, both ends are deformed flat prior to welding so that the end faces face each other almost in parallel. It is necessary to perform a pre-alignment step. Therefore, the above-mentioned manufacturing equipment is provided with the pre-setting unit 2A.
(Processing part of intermediate process) is also provided. This front end part 2
A selectively engages in processing according to the shape of the wheel rim.

[0010] The above-mentioned processing parts 1A, 2A, 3A and 4A have
Delivery rails 1B, 2B, 3B, 4B of a predetermined height are attached, and the delivery rails 1B, 2B, 3B,
Switchback stage 1C, 2C, 3 adjacent to 4B
C and 4C (moving stages) are additionally provided.

The manufacturing facility includes a main rail 10 which is annularly installed at a predetermined height. Along the main rail 10, the processing portions 1A, 2A, 3A, 4A, 5
A is arranged in the counterclockwise direction in the process order. The main rail 10 has a large number of rail portions 11 to 17 separated via intermittent portions. Each rail part 11-17,
It has a carry-in end for sending a hoist crane 30 to be described later to the switchback stage, and a carry-out end for receiving the hoist crane 30 coming out of the switchback stage. The above-mentioned intermittent portion is formed, and the switchback stage is arranged in this intermittent portion.

The rail section 11 is provided with a hoist crane 3.
0 is for waiting. The rail portion 12 (first portion) is disposed between the rounding portion 1A and the switchback stages 1C and 2C of the leading portion 2A. Rail part 13
The (second portion) is disposed between the rounded portion 1A and the switchback stages 1C, 3C of the welded portion 3A. The rail portion 14 (third portion) includes a leading portion 2A and a welding portion 3A.
Is disposed between the switchback stages 2C and 3C. One ends of the rails 13 and 14 are directly linked to the switchback stages 1C and 2C, while the other ends are connected to another switchback stage 6C (auxiliary moving stage) irrelevant to the processing unit and the rail 15. And is connected to the switchback stage 3C of the welding portion 3A.

The rail 16 is arranged between the switchback stages 3C and 4C. Rail 17
Is for returning the hoist crane 30 to the original standby position, one end of which is connected to the switchback stage 4C.
The other end is connected to the standby rail section 11 via a switchback stage 7C (moving stage). Thus, the main rail 10 has an annular shape.

Switchback stage 1 in the above rounding process
C is one carry-in rail 1E and two carry-out rails 1F,
1G (first and second unloading rails). The carry-out rail 1G is rotated by the rotation drive unit 1X in an angle range of about 90 °. The switchback stages 2C, 3C, and 4C in the pre-alignment step, the welding step, and the deburring step include one carry-in rail 2E, 3E, and 4E and one carry-out rail 2C.
F, 3F and 4F, respectively. The switchback stage 6C has two connecting rails 6E and 6F.
(First and second contact rails). The switchback stage 7C has one connecting rail 7E.

The switchback stages 1C, 2C,
The linear movement of the 3C, 4C, 6C, and 7C (movement along the direction in which the carry-in and carry-out rails are arranged) and the rotation of the carry-out rail 1G by the rotation drive unit 1X of the switchback stage 1C are output from various sensors as described later. It is controlled by the control unit 20 based on the detection signal. A rail 25 for maintenance is arranged beside the standby rail section 11 of the main rail 10.

The manufacturing facility further includes a plurality of hoist cranes 30 (cranes). The hoist crane 30 includes a traveling block that travels on the main rail 10 and other rails, a chain that hangs from the traveling block, and a hanging jig attached to the chain. The operator controls the driving of the traveling block and the chain by a remote controller for each hoist crane 30. That is, after the work is hooked on the hanging jig, the chain is driven to put the work in a suspended state, and the traveling block is run to convey the work.

Next, the operation of the wheel rim manufacturing equipment having the above configuration will be described. In the above-mentioned switchback stage 7C, the connecting rail is usually the main rail 10
Are connected between the rail portions 11 and 17. When performing maintenance and inspection of the hoist crane 30, the control unit 20 is operated with the hoist crane 30 positioned on the communication rail 7E, and the switchback stage 7C is operated.
Is moved to connect the contact rail 7E to the maintenance rail 25. After that, the hoist crane 30 is moved to the maintenance rail 25, where maintenance and inspection are performed.

First, an explanation will be given of a case where the process does not go through the pre-matching step. In this case, the control unit 20
The switchback stage 6C is moved on the basis of the setting described above, and the state shown in FIG. 1, that is, the state in which the connecting rail 6E is connected between the rail portions 13 and 15 of the main rail 10 (first state) is switched. As a result, the switchback stage 1C in the rounding process and the switchback stage 3C in the welding process are connected via the rails 13, 15 and the connecting rail 6E. The switchback stages 1C, 2C, 3C and 4C corresponding to the processing steps are shown in FIG.
Waiting in the loading state shown in (1). That is, the carry-in rails 1E, 2E, 3E, and 4E are transferred to the delivery rails 1B, 2B, and 3E.
B, 4B and the main rail 10 are connected.

After the work made of the strip is rounded into a circular member at the rounding section 1A, the circular member is manually moved below the transfer rail 1B. At about the same time, the hoist crane 30 that has been waiting in the standby rail section 11 is caused to travel to the transfer rail 1B via the carry-in rail 1E of the switchback stage 1C. Then, the ring member located below the delivery rail 1B is suspended by the hoist crane 30.

A sensor 41 (first sensor) is arranged near the exit end of the carry-in rail 1E or on the delivery rail 1B. The control unit 20 responds to a detection signal from the hoist crane 30 by the sensor 41.
Moves the switchback stage 1C to the unloading state (second unloading state). That is, as shown in FIG. 2, one end of the unloading rail 1G is connected to the delivery rail 1B. The worker runs the hoist crane 30 with the ring member suspended from the delivery rail 1B to the carry-out rail 1G.

A sensor 42 (third sensor) is disposed on the carry-out rail 1G. In response to the detection of the arrival of the hoist crane 30 by the sensor 42, the control unit 20 puts the switchback stage 1C into the carry-in state. At the same time, the rotation driving unit 1X is driven to rotate the unloading rail 1G by 90 ° (see FIG. 3). Thereby, the carry-out rail 1G is connected to the rail portion 13. The operator lifts the hoist crane 30 from the unloading rail 1G to the rail section 13 and the connecting rail 6 of the switchback stage 6C.
E, the rail section 15, the carry-in rail 3E of the switchback stage 3C, and the delivery rail 3B of the welding process.
Let it run. A sensor 43 (second sensor) is arranged near the exit end of the unloading rail 1G or the unloading end of the rail portion 13 (the end on the unloading rail 1G side). In response, the control unit 20 drives the rotation drive unit 1X to rotate the carry-out rail 1G in the reverse direction by 90 °, and returns to the initial state.

A sensor 44 (first sensor) is disposed near the exit end of the carry-in rail 3E of the switchback stage 3C in the welding process or near the delivery rail 3B, and responds to a signal detected by the hoist crane 30 by the sensor 44. Then, the control unit 20 moves the switchback stage 3C so as to be ready to carry out. That is,
As shown in FIG. 4, the delivery rail 3F is transferred to the delivery rail 3B.
And the rail portion 16 of the main rail 10.
The operator removes the ring member from the hoist crane 30 and moves it to the welded portion 3A. Flash butt welding of both end surfaces of the annular member is performed at the welded portion 3A. The welding may be performed while the ring member is suspended by the hoist crane 30.

The operator moves the annular member welded as described above to a position below the delivery rail 3B, suspends the annular member again by the hoist crane 30, and then reconnects the hoist crane 30 to the delivery rail. 3B to 3C carry-out rail of switchback stage 3C, rail section 16,
It is made to travel to the delivery rail 4B via the carry-in rail 4E of the switchback stage 4C in the deburring step.

A sensor 45 (second sensor) is provided near the exit end of the carry-out rail 3F or the carry-out end of the rail portion 16.
The control unit 20 responds to the detection of the hoist crane 30 by the sensor 45.
Returns the switchback stage 3C to the original loading state. Also, switchback stage 4C in the deburring process
A sensor 46 is disposed at the exit end of the carry-in rail 4E or the transfer rail 4B, and in response to the detection of the hoist crane 30 by the sensor 46, the control unit 20 moves the switchback stage 4C to carry out the carry-out. Get ready. That is, as shown in FIG.
The delivery rail 4F is transferred to the delivery rail 4B and the main rail 10
And the rail section 17 of the first section.

The operator removes the ring member from the hoist crane 30 and moves it to the deburring section 4A. In the deburring section 4A, deburring is performed on the welding portion of the annular member. Deburring may be performed while the ring member is suspended by the hoist crane 30.

After the deburring step, the operator again suspends the ring member by the hoist crane 30, and then transfers the hoist crane 30 from the transfer rail 4B to the rail of the main rail 10 via the carry-in rail 46 of the switchback stage 4C. The vehicle travels to the section 17. The sensor 4 is located at the exit end of the unloading rail 4F or near the unloading end of the rail section 17.
7 (second sensor), and in response to the detection of the hoist crane 30 by the sensor 47, the control unit 20 returns the switchback stage 4C to the original loading state.

The operator finishes the welding of the annular member using a grinder while suspending the annular member on the hoist crane 30 in the middle of the rail section 17, for example, near the deburring section 4A. Therefore, this place is provided as the finishing part 5A. It should be noted that the welded portion of the annular member may be polished by using an automatic polisher instead of manually.

After the above-mentioned polishing, the hoist crane 30 is again driven to stop at the left side of the rail 17 in FIG. 1, and a discharge chute (not shown) disposed immediately below the hoist crane 30 is polished to a polished annular member. That is, the vehicle wheel rim is lowered. Thereafter, the empty hoist crane 30 is returned to the original standby position by pressing the automatic traveling button of the remote controller. In addition, the standby rail 1
1 is provided with a sensor 48 for detecting the hoist crane 30. The control unit 20 automatically stops the hoist crane 30 in response to this.

Next, a case where a pre-alignment step is performed prior to the above-described welding step will be described. In this case, by operating the control unit 20, the switchback stage 6C is switched to the position shown in FIG. That is, the connecting rail 6F is kept connected between the rail portions 14 and 15 of the main rail 10. Thus, the switchback stage 2C in the pre-alignment process is different from the switchback stage 3C in the welding process and the rail unit 1
4, 15 and the connection rail 6F of the switchback stage 6C.

When the hoist crane 30 reaches the delivery rail 1B of the rounding section 1A and is detected by the sensor 41, the control unit 20 moves the switchback stage 1C from the loading state to the unloading state (the second (1 unloading posture). That is, as shown in FIG. 6, the carry-out rail 1F is connected between the delivery rail 1B and the rail portion 12. Therefore, the hoist crane 30 with the ring member suspended is moved from the delivery rail 1B to the unloading rail 1F of the switchback stage 1C, the rail portion 12, and the switchback stage 2 in the pre-alignment step.
Via the carry-in rail 2E of C, it reaches the delivery rail 2B.

A sensor 51 (second sensor) is disposed in the vicinity of the exit end of the unloading rail 1F or in the rail portion 12, and the hoist crane 30 is provided by the sensor 51.
Control unit 2 in response to the detection
0 returns the switchback stage 1C to the original loading state. Also, the switchback stage 2C in the pre-alignment process
A sensor 52 (first sensor) is disposed at the exit end of the carrying-in rail 2E or the delivery rail 2B. In response to the detection of the hoist crane 30 by the sensor 52, the control unit 20 controls the switchback stage 2C to Move it to take it out. That is, the unloading rail 2F is connected between the delivery rail 2B and the rail portion 14 of the main rail 10.

The operator lowers the ring member from the hoist crane 30 supported by the delivery rail 2B, moves the ring member to the pre-alignment portion, and performs pre-alignment processing here. After the completion of the pre-alignment processing, the ring member is suspended from the hoist crane 30 again, and the hoist crane 30 travels. Thus, the hoist crane 30 moves from the delivery rail 2B to the unloading rail 2F of the switchback stage 2C, the rail portion 14, the connecting rail 6F, the rail 15, and the switchback stage 3 of the switchback stage 6C.
Delivery rail 3E of welding process via the loading rail 3E of C
Reach B.

A sensor 53 (second sensor) is disposed near the exit end of the carry-out rail 4E of the switchback stage 2C in the pre-alignment step or near the rail portion 14.
In response to the detection of the hoist crane 30 by the sensor 53, the control unit 20 returns the switchback stage 2C to the original loading state.

The present invention is not limited to the above embodiment, and various forms are possible. For example, the hoist crane may automatically stop in response to detection by the sensors 41, 44, 46, and 52.

[0035]

As described above, according to the first aspect of the present invention, since the crane is used for transferring the work to the plurality of processing sections, the transfer operation can be performed efficiently. Also,
Since this crane runs along the annular main rail, the crane can run smoothly, and a plurality of cranes can be used as necessary. According to the second aspect of the present invention, by using the moving stage, it is possible to smoothly carry the work between the main rail and the processing unit. According to the third aspect of the present invention, the switching of the moving stage from the loading state to the unloading state and the switching from the unloading state to the loading state are automatically performed, so that the productivity can be further improved. According to the invention of claim 4, by rotating the unloading rail, the irregular arrangement of the main rail can be made possible. According to the invention of claim 5, an intermediate step which is selectively engaged in processing is also incorporated,
Work transfer can be performed smoothly. According to the invention of claims 6 and 7, the invention can be applied to manufacture of a vehicle wheel rim. According to the invention of claim 8, it is possible to perform the polishing finish of the welded portion of the vehicle wheel rim while suspending it.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a facility for manufacturing a vehicle wheel rim according to an embodiment of the present invention.

FIG. 2 is a plan view showing an operation of a switchback stage in a rounding step.

FIG. 3 is a plan view showing rotation of a carry-out rail in a switchback stage in a rounding process.

FIG. 4 is a plan view showing an operation of a switchback stage in a welding process.

FIG. 5 is a plan view showing an operation of a switchback stage in a deburring step.

FIG. 6 is a plan view showing an operation of an auxiliary switchback stage when a pre-alignment step is performed.

[Explanation of symbols]

1A Rounding part (working part) 2A Pre-aligned part (working part) 3A Welding part (working part) 4A Deburring part (working part) 5A Finishing part (working part) 1B, 2B, 3B, 4B Delivery rails 1C, 2C, 3C, 4C Switchback stage (moving stage) 1E, 2E, 3E, 4E Loading rail 1F, 1G, 2F, 3F, 4F Unloading rail 1X Rotating drive unit 10 Main rail 11 to 17 Rail unit 20 Control unit (control means) 30 hoist crane (crane) 41-48,51-53 sensor

Claims (8)

[Claims] 1. A main rail which draws an annular shape;
A plurality of processing sections arranged in the processing order along the main rail, (c) a delivery rail attached to each processing section, and (d) traveling on the main rail while suspending the work to reach the delivery rail. And a crane returning from the delivery rail to the main rail while suspending the workpiece after the workpiece is processed in the processing section, and heading to the next processing section. 2. The main rail has an intermittent portion corresponding to the processing portion, one end of the intermittent portion serving as a carry-in end, the other end serving as a carry-out end, and a carry-in end, a carry-out end, and a delivery rail. In between,
A moving stage is provided. The moving stage includes a carry-in rail and a carry-out rail. When carrying the work into the processing section, the carry-in rail is connected between the carry-in end of the main rail and the delivery rail. When the work is unloaded from the processing section, the unloading rail is switched to the unloading state connected between the unloading end of the main rail and the delivery rail, and the crane loads the main rail while suspending the work. From the end, travel on the transfer rail of the moving stage to reach the transfer rail, and after processing the work in the processing section, run the transfer rail of the transfer stage from the transfer rail while suspending the work, and reach the discharge end of the main rail. The production facility according to claim 1, wherein: And a control means for switching the moving stage in response to a detection signal from the sensor, the control means comprising: a first sensor for detecting a crane corresponding to each of the moving stages; The first sensor is arranged at an exit end of a carry-in rail of the moving stage or at a delivery rail, and the second sensor is arranged near an exit end of a carry-out rail of the movable stage or a carry-out end of a main rail. In response to the crane detection by the first sensor, the moving stage is switched from the loading state to the unloading state, and in response to the crane detection by the second sensor, the moving stage is switched from the unloading state to the loading state. 3. The manufacturing facility according to claim 2, wherein the switching is performed. 4. A rotary drive unit for rotating the unloading rail is provided on the moving stage, and a third sensor for detecting a crane is provided on the unloading rail, and in response to the crane detection by the third sensor. 4. The manufacturing equipment according to claim 2, wherein the control means controls the rotation drive unit to rotate the carry-out rail, and connects the outlet end to the carry-out end of the main rail. 5. A processing section for an intermediate step, which is responsible for processing a workpiece as required, is disposed between the processing section for the previous process and the processing section for the post-process. , First and second
A first unloading rail in which the first unloading rail is connected to the delivery rail during work unloading;
The second unloading rail can be selected from a second unloading state in which the second unloading rail is connected to the delivery rail, and the main rail includes a first portion disposed between a moving stage of a pre-process and an intermediate process; A second portion disposed between the moving stages in the post-process; and a third portion disposed between the moving stages in the intermediate process and the post-process. When the first unloading posture is selected and the first unloading rail is connected to the first portion of the main rail when not engaged in the processing of the work, and when the processing unit in the intermediate process is engaged in the processing of the work, the second unloading state is selected. Selecting the unloading position and connecting the second unloading rail to the second portion of the main rail, the main rail having a fourth portion directly connected to a moving stage in a subsequent process, and the fourth portion being an auxiliary moving stage Through the first, The auxiliary moving stage has first and second connecting rails. When the processing section in the intermediate process is not involved in processing the work, the first connecting rail is connected to the second main rail. When the processing unit in the intermediate step is engaged in processing of the work, the second connecting rail is connected to the third and fourth parts of the main rail when the first unit is switched to the first state to be connected between the part and the fourth part. Second connected
The production facility according to any one of claims 2 to 4, wherein the production facility is switched to an attitude. 6. The plurality of processed parts include a bent part for rounding the strip into an annular shape, a welded part for welding both end faces of the annular member, and a deburring part for cutting and removing burrs at the welded part. The manufacturing facility according to any one of claims 1 to 4, wherein a vehicle wheel rim is obtained. 7. The processing part in the preceding step is a bending part for rounding the band plate in an annular shape, and the intermediate step is a front end part for flattening both end parts of the annular member and joining both end surfaces thereof. There is a processed part in a post-process, a welded portion for welding both end faces of the annular member, and a processed portion in a process subsequent to this is,
It is a deburring part that cuts and removes burrs at the above welding points,
The manufacturing facility according to claim 5, wherein a wheel rim for a vehicle is obtained. 8. The manufacturing equipment according to claim 6, wherein a main rail connected to the moving stage corresponding to the deburring part is provided as a finishing part for performing a finish polishing of the welding portion.