Machining device and machining method
阅读说明:本技术 加工装置及加工方法 (Machining device and machining method ) 是由 江藤润 海野纮和 竹内真一 于 2017-11-07 设计创作,主要内容包括:本发明涉及一种加工装置(1)具备:第1加工位置(A1)及第2加工位置(A2),对工件(W)进行粗加工;第3加工位置(B1),对在第2加工位置(A2)中加工的工件(W)进行最终精加工;柔性虎钳(7),设置于第1加工位置(A1)及第2加工位置(A2),夹紧并固定工件(W);及快速夹钳(20),设置于第3加工位置(B1),并将工件(W)通过销来固定。加工装置(1)具备控制部,控制进行粗加工的粗加工用工具及进行最终精加工的最终精加工用工具。(The present invention relates to a processing device (1) comprising: a1 st machining position (A1) and a2 nd machining position (A2) for roughly machining a workpiece (W); a3 rd machining position (B1) for performing final finishing on the workpiece (W) machined at the 2 nd machining position (A2); a flexible vice (7) which is provided at a1 st processing position (A1) and a2 nd processing position (A2) and clamps and fixes a workpiece (W); and a quick clamp (20) which is arranged at the 3 rd processing position (B1) and fixes the workpiece (W) through a pin. The machining device (1) is provided with a control unit for controlling a rough machining tool for rough machining and a final finishing tool for final finishing.)
1. A machining device is provided with:
a rough machining position for performing rough machining on the workpiece;
a final finish machining position for performing final finish machining on the workpiece machined in the rough machining position;
the clamping and fixing device is arranged at the rough machining position and is used for clamping and fixing the workpiece; and
and a pin fixing tool provided at the final finishing position for fixing the workpiece by a pin.
2. The machining device according to claim 1, comprising:
a rough machining tool for machining at the rough machining position;
a final finishing tool for performing machining at the final finishing position; and
and a control unit for controlling the rough machining tool and the final machining tool.
3. The processing apparatus according to claim 2,
the control unit sets a jig origin provided on a jig for fixing a workpiece as a positional reference when performing the machining at the rough machining position, and sets a workpiece origin provided on the workpiece as the positional reference when performing the machining at the final finish machining position.
4. The processing device according to claim 3,
the workpiece origin is set at the end of machining in the rough machining position.
5. The processing apparatus according to any one of claims 1 to 4, comprising:
the auxiliary base station is arranged on the workbench; and
and a jig base detachably fixed to the auxiliary base.
6. The machining device according to claim 5, comprising:
and a support member provided at the final finishing position and supporting the workpiece in surface contact with the opposite surface of the workpiece.
7. The processing device according to claim 6,
the support member is detachably fixed to the jig base.
8. The processing device according to claim 7,
a suction flow path that opens to the opposite surface side of the workpiece is formed in the support member,
the processing device is provided with a suction mechanism for sucking gas through the suction flow path.
9. The processing apparatus according to any one of claims 1 to 8,
the rough machining position comprises a1 st machining position for roughly machining the front surface of the workpiece and a2 nd machining position for roughly machining and finely machining the back surface of the workpiece,
the final finishing position has a 3 rd machining position that finishes the surface of the workpiece,
the machining device includes a conveying mechanism for conveying the workpiece among the 1 st machining position, the 2 nd machining position, and the 3 rd machining position.
10. A method of processing, comprising:
a rough machining step of roughly machining the workpiece; and
a finish machining step of performing finish machining on the workpiece machined in the rough machining step,
in the rough machining step, a jig origin provided on a jig for fixing a workpiece is set as a positional reference,
in the final finishing step, a workpiece origin provided in the workpiece is set as a position reference.
Technical Field
The present invention relates to a machining apparatus and a machining method for machining a workpiece that is easily deformed, such as a large component of an aircraft.
Background
To improve the productivity of large-sized components, it is necessary to increase the efficiency of preparation work as well as machining. For this purpose, a method of exchanging the components for each pallet by a pallet exchanger or a method of processing the components by placing a plurality of components on one pallet is adopted.
In a module which is rigid and less likely to deform, such as an engine block or a casing, preparation work for a plurality of modules can be performed only by a lifting operation, and the preparation work is also simple. However, in a large-sized module which is easily deformed and requires both surfaces to be connected, such as an aircraft structural module, replacement of jigs and adjustment work at the time of preparation work are required to cope with a complicated shape, and therefore, the preparation work time becomes long. Therefore, in general, an FMS (Flexible Manufacturing System) line that uses a plurality of pallets one by one is often assembled by automation. However, a large number of pallets are required, and hence the cost of equipment deterioration becomes high.
Prior art documents
Patent document
Patent document 1: japanese patent No. 3452630
Disclosure of Invention
Technical problem to be solved by the invention
However, the
An object of the present disclosure is to provide a machining apparatus and a machining method that can efficiently and highly accurately machine a large component such as an aircraft when machining a workpiece that is easily deformed by a plurality of processes.
Means for solving the technical problem
A machining device according to an aspect of the present invention includes: a rough machining position for performing rough machining on the workpiece; a final finish machining position for performing final finish machining on the workpiece machined in the rough machining position; the clamping and fixing device is arranged at the rough machining position and is used for clamping and fixing the workpiece; and a pin fixing tool which is provided at the final finishing position and fixes the workpiece by a pin.
The machining device is provided with a rough machining position for rough machining of a workpiece and a final finish machining position for final finish machining of the workpiece. Before rough machining, the workpiece has a predetermined rigidity, and therefore, even if the workpiece is clamped, the workpiece is not largely deformed. Therefore, it is necessary to provide a clamp fixture capable of easily fixing the workpiece at the rough machining position.
On the other hand, since rough machining is performed in the final finish machining position, the rigidity of the workpiece is reduced, and the workpiece may be deformed if clamped. Therefore, a pin fixing tool for fixing the workpiece by the pin is provided at the final finishing position.
Since the clamp fixture and the pin fixture are separately used for rough machining and final machining, the rough machining and the final machining can be efficiently performed with high accuracy.
The rough machining position may include a finish machining of a surface different from a surface subjected to not only rough machining but also final finish machining.
As the clamp fixture, in addition to the outer clamp for clamping by clamping from both outer sides of the workpiece, an inner clamp for clamping by applying a load from the inner side of the groove portion of the workpiece to the outer side can be used.
The workpiece after machining is, for example, a long and thin shape with a length of several m (4 to 5m) and a plate thickness of several mm (1 to 2 mm).
A machining device according to an aspect of the present invention includes: a rough machining tool for machining at the rough machining position; a final finishing tool for performing machining at the final finishing position; and a control unit for controlling the rough machining tool and the final machining tool.
The control unit performs rough machining and final finishing, thereby facilitating automation of machining.
In the machining device according to one aspect of the present invention, the control unit sets a jig origin provided in a jig for fixing a workpiece as a positional reference when performing the machining in the rough machining position, and sets a workpiece origin provided in the workpiece as the positional reference when performing the machining in the final finish machining position.
Since the machining at the rough machining position is performed before the final shape of the workpiece is determined, there is a possibility that the workpiece is deformed due to the deformation of the material of the workpiece during the machining, and therefore, the jig for fixing the workpiece is set as the position reference. On the other hand, in the machining at the final finishing position, since the final shape of the workpiece is determined, the machining accuracy is ensured by setting the workpiece as a position reference.
In the machining apparatus according to one aspect of the present invention, the workpiece origin is set at the time of finishing machining at the rough machining position.
It is set to set the origin of the workpiece at the end of machining in the rough machining position. This makes it possible to form a workpiece origin in the workpiece before the final finishing, and to minimize the mismatch between the preliminary finishing and the final finishing.
A machining device according to an aspect of the present invention includes: the auxiliary base station is arranged on the workbench; and a jig base detachably fixed to the auxiliary base.
The jig base is detachably fixed to the table via the auxiliary base. Thus, by preparing a plurality of jig bases corresponding to workpieces of various shapes, machining corresponding to various workpieces can be performed.
In order to detachably fix the jig base to the auxiliary base, it is preferable to use a pin clamping unit including: a pin fixed to one of the jig base or the auxiliary base; and a pin fixing member fixed to the other of the jig base or the auxiliary base and accommodating and fixing the pin. The pin clamping unit can be operated by, for example, air pressure.
The machining device according to one aspect of the present invention includes a support member that is provided at the final finishing position and supports the workpiece in surface contact with the facing surface of the workpiece.
The workpiece subjected to the final finishing is already subjected to rough machining, and therefore, the rigidity is lowered. Therefore, by providing the support member that supports the facing surface of the workpiece in contact therewith, the workpiece can be machined without causing chatter vibration during machining.
As the support member, for example, a thin portion having a surface shape corresponding to the shape of the facing surface is used.
In the machining device according to one aspect of the present invention, the support member is detachably fixed to the jig base.
Since the support member is detachably fixed to the jig base, a plurality of support members corresponding to the facing surfaces of the workpieces having various shapes are prepared, and thus machining corresponding to various workpieces can be performed.
In order to detachably fix the support member to the jig base, it is preferable to use a pin clamping unit including: a pin fixed to one of the support member or the jig base; and a pin fixing member fixed to the other of the support member or the jig base and accommodating and fixing the pin. The pin clamping unit can be operated by, for example, air pressure.
In the machining device according to one aspect of the present invention, a suction passage that opens to the opposite surface side of the workpiece is formed in the support member, and the machining device is provided with a suction mechanism that sucks gas through the suction passage.
The suction mechanism (for example, a vacuum pump) sucks gas through the suction flow path of the support member, thereby sucking the opposite surface of the workpiece. This enables the workpiece to be reliably held during final finishing.
The suction flow path formed in the support member may be connected to the suction flow paths formed in the jig base and the auxiliary base, and may be sucked by a common suction mechanism.
In addition, in the machining apparatus according to one aspect of the present invention, the rough machining position includes a1 st machining position that performs rough machining on a front surface of a workpiece and a2 nd machining position that performs rough machining and finish machining on a rear surface of the workpiece, the final finishing position includes a 3 rd machining position that performs finish machining on the front surface of the workpiece, and the machining apparatus includes a conveying mechanism that conveys the workpiece among the 1 st machining position, the 2 nd machining position, and the 3 rd machining position.
When machining the front and back surfaces of a workpiece, the workpiece is conveyed by a conveyor among a1 st machining position, a2 nd machining position, and a 3 rd machining position, the front surface is roughly machined at the 1 st machining position, the back surface is roughly machined and finished at the 2 nd machining position, and the front surface is finished at the 3 rd machining position. Thus, the processing can be efficiently performed by one pallet.
A processing method according to an aspect of the present invention includes: a rough machining step of roughly machining the workpiece; and a final finishing step of performing final finishing on the workpiece machined in the rough machining step, wherein a jig origin provided on a jig for fixing the workpiece is set as a positional reference in the rough machining step, and a workpiece origin provided on the workpiece is set as a positional reference in the final finishing step.
In the rough machining step, before the final shape of the workpiece is determined, since there is a possibility that deformation occurs due to deformation of the workpiece material during machining, a jig for fixing the workpiece is set as a position reference. On the other hand, in the final finishing step, since the final shape of the workpiece is determined, the machining accuracy is ensured by setting the workpiece as a position reference.
Effects of the invention
The machining in a plurality of processes can be performed efficiently and with high precision.
Drawings
Fig. 1A is a perspective view showing a state before a workpiece is placed on a pallet.
Fig. 1B is a perspective view showing a state in which a workpiece is placed at a rough machining position.
Fig. 1C is a perspective view showing a state in which a workpiece is placed at a rough machining position.
Fig. 1D is a perspective view showing a state after rough machining is performed on a workpiece in the rough machining station.
Fig. 1E is a perspective view showing a state where the workpiece is taken out from the rough machining position.
Fig. 1F is a perspective view showing a state in which the workpiece is placed at the final finishing position.
Fig. 1G is a perspective view showing a state where the workpiece is taken out from the final finishing position.
Fig. 1H is a perspective view showing a state after the workpiece is taken out from the final finishing position.
Fig. 1I is a perspective view showing a state where the workpiece is conveyed to the next step.
Fig. 2A is a perspective view showing the pallet.
Fig. 2B is a perspective view showing a state in which a workpiece is set on the pallet of fig. 2A.
Fig. 3 is a perspective view showing the flexible vise.
Fig. 4A is a cross-sectional view of a pallet.
Fig. 4B is an exploded cross-sectional view illustrating the pallet of fig. 4A.
Fig. 5 is a perspective view showing the auxiliary base.
Fig. 6 is a plan view showing a reference position.
Fig. 7 is a flowchart showing a rough machining process.
Fig. 8 is a flowchart showing a final finishing process.
Fig. 9 is a flowchart showing a process of repeating the working.
Detailed Description
Hereinafter, an embodiment of a machining apparatus and a machining method will be described.
In the present embodiment, a workpiece, such as an aircraft, which is easily deformed by a large component, is cut. The workpiece is made of metal such as aluminum alloy, and is processed into a shape of a frame or the like of an aircraft structure. The workpiece has a long strip shape with a length of several m (4 to 5m), and is subjected to various groove processing, etc., and the thickness after processing is several mm (1 to 2 mm).
Fig. 1A to 1I show a machining process using a machining apparatus.
As shown in fig. 1A, the
As shown in fig. 1A, the conveying robot arm (conveyor) 2 grips the workpiece W, and as shown in fig. 1B and 1C, the workpiece W is set at a rough machining position a, which is the initial machining position. Then, as shown in fig. 1D, the surface of the workpiece W is roughly machined by an end mill (rough machining tool), not shown. After the surface of the workpiece W is roughly machined, the surface of the workpiece W is finished at the same rough machining position.
Then, as shown in fig. 1E, after the front surface and the back surface of the workpiece W are reversed by the conveying
Then, as shown in fig. 1G, the workpiece W having been subjected to final finishing is gripped by the conveying
Next, a pallet P for processing the workpiece W will be described. Note that the pallet P to be described below shows a case where the machining position A, B is three positions, instead of the machining position A, B being two positions as in the pallet P shown in fig. 1A and the like.
As shown in fig. 2A, the pallet P includes a table 3, an
The 1
A plurality of flexible vices (clamping fixtures) 7 for clamping from the outside in the width direction of the workpiece W are provided at the respective machining positions a1 and a 2. The
In fig. 3a
Further, since the rough machining of the surface of the workpiece W is completed in the 1 st machining position a1, the inner clamp that clamps the workpiece W by applying a load outward from the inside of the groove portion of the workpiece W can be used also in the 2 nd machining position a 2.
As shown in fig. 2A, a plurality of jacks 13 projecting upward from the 1
The 2
At the 3 rd machining position B1, a detail (support member) 17 is fixed. The
On both sides of the
Fig. 4A and 4B show a longitudinal section of the pallet P. As shown in fig. 4, an
As shown in fig. 5, the
Further, the air pressure for operating the respective
As shown in fig. 4B, the
The
The
Various reference positions used by the control section are shown in fig. 6.
A1
A 3
Three
The
Next, a machining method using the
Fig. 7 shows a sequence for rough machining of the workpiece W in the 1 st machining position a1 (see fig. 2A) or the 2 nd machining position a2 (see fig. 2A). The following steps are performed by instructions from the control unit.
First, in step S11, several options for processing the workpiece W are selected. Then, the 1
The 1
Then, the material or the workpiece W is set at the 1 st processing position a1 or the 2 nd processing position a2 (step S14). Here, the material indicates the workpiece W before rough machining.
Next, the pallet P is moved into the machine (step S15). Here, the machining machine refers to a machining machine that performs cutting by using an end mill.
The jig setting and whether or not the jig setting is within the position error threshold are checked in the machine (step S16). Here, whether or not the jig is set at a predetermined position is confirmed by confirming the setting of the jig, and whether or not the setting position of the jig is within a predetermined range is confirmed. If the determination at step S16 is no, an alarm is issued (step S17). If the determination at step S16 is yes, the process proceeds to step S18.
In step S18, the kind of the workpiece W is recognized, and it is determined whether the workpiece shape is accurate. This determination is performed by a touch sensor (probe) held by the main shaft of the machining apparatus by, for example, coming into contact with a tab WT (see fig. 4B) of the workpiece W. The tab WT is a protruding portion protruding from a product portion of the workpiece W, and is set as a non-product portion of the workpiece W. If the determination at step S18 is no, an alarm is issued (step S19). If the determination at step S18 is yes, the process proceeds to step S20.
In step S20, a machining origin is set. In the 1 st machining position a1 and the 2 nd machining position a2, the 1 st jig origin 31 (see fig. 6) and the 2 nd jig origin 32 (see fig. 6) are used. The jig origin points 31 and 32 are detected by touch sensors provided on the main spindle of the machining apparatus, for example, by being brought into contact with the jig origin points 31 and 32.
Then, various groove processing and the like are performed by the end mill (step S21). During machining, the machining amount and the like are appropriately measured.
In the 2 nd machining position a2, after the rough machining of the back surface of the workpiece W is completed, the finish machining of the back surface of the workpiece W is also performed.
After finishing the rough machining and the finish machining of the workpiece W at the 2 nd machining position a2, the tab WT of the workpiece W is subjected to hole forming machining, and a pin WP (refer to fig. 4B) is inserted and fixed. Pin WP is used in securing the workpiece to quick clamp 20 (see FIG. 2A) in
When the machining is completed, cleaning by air blowing or the like is performed (step S22), and the workpiece is carried out of the machine (step S23).
Then, a preparation operation such as removal of the workpiece W is performed (step S24), and preparation for the next option is performed (step S25).
Next, the final finishing at the 3 rd machining position B1 will be described with reference to fig. 8. The final finishing is performed by adding 20 to the symbol of step S in fig. 7 (for example, S11 corresponds to S31) in the same steps as those described with reference to fig. 7. Hereinafter, a process (step) different from that of fig. 7 will be described. The following steps are performed by instructions from the control unit.
In step S33A, the 2
In step S34A, the workpiece W is set at the 3 rd machining position B1. At this time, the workpiece W is set by inserting the pin WP fixed to the workpiece W at the 2 nd processing position a2 into the
After the determination of yes in step S38 and before the machining origin is set in step S40A, the tilt of the 2
In the machining origin setting of step S40A, one of the
After step S40A, and before step S41, error correction of the work W is performed (step S47). The error correction uses the
Next, a case where the repetitive processing is performed will be described with reference to fig. 9. The machining was repeated while machining similar options at each of the machining positions a1, a2, B1. The following steps are performed by instructions from the control unit.
First, in step S51, an option for the next machining is selected, and a jig base and a material (unprocessed workpiece W) are prepared (step S52).
Then, the pallet P finished machining by the machining machine is carried out (step S53), and the workpiece W finished machining at the 3 rd machining position B1 is taken out (step S54).
Then, the
In step S56, after the back surface of the workpiece W is finished at the 2 nd machining position a2, a hole-insertion pin WP formed by drilling the tab WT is inserted.
Next, by the conveying robot arm 2 (refer to fig. 1A), the front surface and the back surface of the workpiece W in the 2 nd processing position are reversed, and the workpiece W is set at the 3 rd processing position B1 (step S57).
In step S58, the workpiece W that has finished the rough machining of the surface of the workpiece W in the 1 st machining position a1 is reversed and the workpiece W is set in the 2 nd machining position a2 by the conveying
In step S59, the
After the setting of the workpiece W is completed at the respective machining positions a1, a2, and B1 as described above, the pallet P is simultaneously carried in the machine (step S60), the front surface of the workpiece W is roughly machined at the 1 st machining position a1 (step S61), the rear surface of the workpiece W is roughly machined and finished at the 2 nd machining position a2 (denoted as "intermediate process" in the drawing) (step S62), and the front surface of the workpiece W is finally finished at the 3 rd machining position B1 (step S63).
Then, the inside of the machine is cleaned by air blowing or the like (step S64), and preparation for the next option is performed (step S65).
By repeating the above steps, as long as similar options are available, machining can be efficiently performed using the respective machining positions a1, a2, B1.
According to the present embodiment, the following operational effects are exhibited.
The machining device is provided with a1 st machining position A1 and a2 nd machining position A2 for performing rough machining on the workpiece W, and A3 rd machining position B1 for performing final finishing on the workpiece W. Before rough machining, the workpiece W has predetermined rigidity, and therefore, even if the workpiece W is clamped, the workpiece W is not largely deformed. Therefore, it is assumed that the
On the other hand, since rough machining is performed at the 3 rd machining position B1 where final finishing is performed, the rigidity of the workpiece W is reduced, and the workpiece W may be deformed when clamped. Therefore, a quick clamp for fixing the workpiece W by the pin WP is provided at the 3 rd machining position B1.
In this way, since the clamp fixture and the pin fixture are separately used for rough machining and final machining, rough machining and final machining can be efficiently performed with high accuracy.
Since the plurality of processing positions a1, a2, and B1 are provided in the same pallet P to enable simultaneous processing, automation of processing can be promoted.
Since the machining in the rough machining position is performed before the final shape of the workpiece W is determined, there is a possibility that the workpiece W is deformed due to the deformation of the material thereof during the machining, the
The
The jig bases 5A and 5B are detachably fixed to the table 3 via the
Since the workpiece W subjected to the final finishing is already subjected to rough machining, the rigidity is lowered. Therefore, by providing the
Since the
The
When machining the front and rear surfaces of the workpiece W, the workpiece W is conveyed by the
In the present embodiment, the description has been given with two (fig. 1A) or three (fig. 2A) machining positions provided on one pallet P, but the present invention is not limited to this, and four or more machining positions may be provided.
The quick clamps 22, 20, and 24 have been described as an example of a device for detachably connecting the
Description of the reference numerals
1-processing apparatus, 2-conveying robot arm (conveyor), 3-work table, 4-auxiliary base, 4 a-suction flow path, 4a1- (suction flow path) connector section, 5A-1 st gripper base, 5B-2 nd gripper base, 5 Ba-suction flow path, 7-flexible vice (clamping fixture), 8-guide rail, 9-sliding fixture, 11-jaw, 13-jack, 17-thin section (support part), 17 a-suction flow path, 17B-sealing part, 17 c-pin, 20-quick gripper (pin fixture), 22-quick gripper, 22 a-suction flow path, 23-pin, 24-quick gripper, 31-1 st gripper origin, 32-2 nd gripper origin, 33-3 rd fixture origin, 34a, 34B, 34 c-workpiece origin, 35-pallet origin, a-rough machining position, a 1-1 st machining position, a 2-2 nd machining position, B-final finish machining position, B1-3 rd machining position, P-pallet, W-workpiece, WT-tab, WP-pin.
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