JP2006239855A - V-shaped groove machining device having twin tool posts and twin clamps and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a V-shaped groove machining device having twin tool posts and twin clamps and its method capable of reducing production cost and efficiently utilizing an expensive machining device. <P>SOLUTION: Setting blocks are opposedly provided respectively on the both sides of the longitudinal direction of a bed of a V-shaped groove machining device, and side clamps continuously formed in the longitudinal direction are provided on these setting blocks. A pair of front clamps is provided on one side of the bed, and the front clamps are screwed with a clamp travel screw having screw threads in both directions and can be simultaneously moved. A pair of tool posts are separately mounted to a carriage of the V-shaped groove machining device, the tool posts having the screw threads in both directions are separately mounted to the carriage of the V-shaped groove machining device, and the tool posts are mounted to a tool post travel screw having the screw threads in both directions to simultaneously come close to or separate from with the same width of the front clamp. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a V-groove processing apparatus for processing the surface of a metal plate material, and in particular, a tool base having a pair of tool bases mounted on a carriage in the V-groove processing apparatus spaced apart from each other and having screw threads in both directions. The upper surface of the bed is actuated simultaneously by the transfer screw, the front clamp and the side clamp formed on the lower bed are symmetrically formed, and the front clamp is simultaneously actuated by the clamp transfer screw having a thread in both directions. Virtually bisect, and simultaneously process two metal plates with a pair of tool rests and clamps on the bisected dividing plane, and always set the clamping reference point constant when processing the back side of the metal plate In both-side processing, the V-grooves on both sides are prevented from shifting from each other, product defects are prevented, and the back side processing of the metal plate with one side processed Since the metal plate can be moved and rotated more easily and conveniently, not only the work speed is remarkably improved but also one person can work alone, and a large amount of metal plates with stable quality can be processed. The present invention relates to a V-groove machining apparatus and a V-groove machining method having a twin tool rest and a twin clamp.

Generally, a V-groove processing device is a device that forms a straight groove by a cutting tool on the surface of a workpiece such as a flat metal plate, and obtains a metal square tube having a desired shape by bending the metal plate with the straight groove. It is.
That is, the metal column body of a frame body such as a revolving door or a fire door is usually composed of a metal square tube having excellent physical characteristics, but when the metal square tube is formed by bending a plate-shaped metal material. Has a problem that the bent corner part is bent so softly that it cannot be designed in the intended design. Most universally, the bent groove is formed by a V-groove processing device along the bending line. When the metal plate is bent along the bent groove, the metal material is easily bent while the round portion of the bent corner is greatly reduced. The V-groove processing method is used.

  As shown in FIG. 1, the general V-groove processing apparatus as described above includes a bed 101 on the upper surface of the main body 100, and a carriage 102 that moves on the upper side of the bed 101 is mounted on both sides of the main body 100. A guide rail 103 is provided, and the carriage 102 is provided with a tool table 105 that is moved to the left and right by a transfer screw 104. A plurality of side clamps 106 are mounted on a setting block 109 on a longitudinal side surface of the bed 101. A single front clamp 107 is located on one side of the bed 101, and a control box 108 for controlling each actuator is provided on the upper side of the carriage 102.

A schematic operation relationship of the conventional V-groove processing apparatus configured as described above will be described.
As shown in FIG. 2 a, first, the metal plate 110 is placed on one side surface of the bed 101. At this time, the setting reference point of the metal plate 110 is set by placing one side corner of the metal plate 110 at the intersection of the side clamp 106 and the front clamp 107 and placing the setting block 109 on one side of the bed 101 as a reference. It will be.

When the side plate 106 and the front clamp 107 are operated while the metal plate 110 is placed in close contact with the side surface of the setting block 109, the metal plate 110 is firmly clamped on the bed 101 without floating. .
When the metal plate member 110 is clamped in this way, the tool base 105 is operated to form a V groove on the surface of the metal plate member 110. At this time, the surface of the metal plate 110 is cut while the carriage 102 is reciprocating simultaneously with the lowering of the tool base 105 to form a V-groove. Here, one or a plurality of V-grooves are formed according to the numerical values input to the control box 108.

  When the processing of the upper surface of the metal plate material 110 is thus completed, the rear surface of the metal plate material 110 is processed. In order to process the back surface of the metal plate 110, the metal plate 110 is not simply rotated and turned upside down, but is rotated first on the X axis with respect to the bed 101 in order to match the initial setting reference point. Then, it is placed on the setting reference point of the bed 101 by secondary rotation on the Y axis.

  That is, the V-groove processing apparatus as described above is for processing a metal plate having a relatively large length and width, and the bed has a width of about 1600 mm and a length of 5200 mm. A metal plate of about a meter may be processed.

However, as described above, when the length of the metal plate 110 is long, there is a problem that the straightness of the straight surface is not accurately maintained when the original plate of the metal plate is processed.
The original metal plate of the size as described above is cut from the base material for obtaining the metal plate material 110, but when the base material is cut, shear resistance, friction resistance, and tensile resistance are combined. As shown in FIG. 2b, the longitudinal cut surface is not formed in a straight line, but is formed in a curved shape in a bulging shape (a slightly exaggerated cut for easy confirmation with the naked eye). Have a face).

  Such a curved cut surface is not easily observable with the naked eye, and there is no problem in use. However, as described above, when it is necessary to set the V groove processing apparatus, one side swells. Since the other side has a recessed cut surface, the metal plate 110 is placed at a position and an angle that differ depending on the expanded cut surface when both sides are set to the same reference surface. There is a problem.

  Accordingly, the metal plate 110 whose upper surface is primarily processed as described above is not immediately turned over and the rear surface is processed, but after the primary rotation on the X axis with reference to the bed as shown in FIG. As shown in FIG. 2d, by rotating again on the Y axis, the reference surface used for processing the upper surface is further used as a reference surface for processing the back surface. In order to process the V-groove, a metal plate material can be set.

The other setting method of the metal plate 110 is not based on the primary rotation on the X-axis and the secondary rotation on the Y-axis as described above, but two people face each other and hold the both sides of the metal plate 110, and the bed 101 There is also a method in which the metal plate member 110 is further rotated on the X axis of the bed after being rotated by 180 ° in the vertical direction on the upper surface of the bed, and the side edges are set to the setting block.
However, the above-described method for setting a metal plate and the processing work using the metal plate material have a problem that an excessive number of workers and work time are required.

Normally, the number of V-grooves formed on the metal plate is 1 to 10, and the time for automatically processing the V-groove does not take too long. However, as described above, the setting time by the primary rotation and the secondary rotation of the metal plate Takes a large amount of time, and as a whole becomes very inefficient work.
Also, the metal plate cannot be rotated by one person, and the length of the metal plate is usually very long, and two or four people have to rotate the metal plate so that many workers can work at the same time. It is required to have inevitable problems such as an increase in labor costs and an increase in production costs.

  In addition, since the time for rotating the metal plate material is longer than the actual working time of the V-groove processing device, the processing device cannot be used efficiently and the daily production is very low. It is very irrational to take advantage of expensive equipment.

Depending on the case, there is also a method of rotating the metal plate material upright. This method requires a very high ceiling height inside the workplace, but most workplaces do not have enough room height to correspond to the bed height of the processing equipment and the total length of the metal sheet. In the case of a very long metal plate, when rotating it upright, many people must be put in at the same time, and there is a problem that the metal plate tends to be bent. It has not been.
JP 2005-052850 A

  Therefore, the present invention has been made in view of the above problems, and setting blocks are provided on both sides of the bed in the longitudinal direction of the V-groove processing device so as to face each other, and these setting blocks are continuously formed in the longitudinal direction. Each side of the bed is provided with a pair of front clamps on one side of the bed, coupled to a clamp transfer screw having a screw thread in both directions, and moved simultaneously, and a carriage for a V-groove processing apparatus. A pair of tool bases are mounted separately, mounted on a tool base transfer screw having screw threads in both directions, and operated simultaneously close to or apart from each other at the same width as the front clamp. Two metal sheets can be processed simultaneously on the bed.

  In this way, when processing the other side after processing one surface, the same setting point can be obtained by making one rotation on the X axis of the bed and placing it on the other setting block, so even with a single rotation only A constant and stable V-groove can be obtained, the rotating operation of the metal plate is relatively simple, and one person can work alone, so the number of workers can be reduced, and two metal plates at the same time Since the setting time of the metal plate material is greatly reduced while machining, the production volume is drastically increased, the production cost is reduced, and the expensive machining equipment can be used more efficiently. It is an object of the present invention to provide a V-groove machining apparatus and a V-groove machining method having an effective twin tool rest and twin clamp.

  In order to solve the above-described problems, according to the first invention, a pair of setting blocks divided to face both sides with respect to the center of the bed, side setting means having side clamps corresponding thereto, and the bed A clamp screw having a bi-directional screw thread that is rotated by a reversible clamp motor at one side end and a clamp transfer means having a pair of front clamps screwed to the screw and a carriage on the bed, and is rotated by a reversible transfer motor. There is provided a buoy groove processing apparatus having a twin tool table and a twin clamp, which comprises a tool table screw having a bidirectional screw thread and a tool table transfer means having a pair of tool tables attached to the screw.

  Further, according to the second invention for solving the above-mentioned problem, the setting is such that one side surface in the longitudinal direction of the metal plate material is set as a setting reference surface, and the same cut side surface of the two metal plate materials is formed on both sides in the vertical direction of the bed. Clamps the block, and clamps them with side clamps, and clamps the processing start end of the metal plate with a pair of front clamps that operate opposite to each other, and is positioned vertically above the front clamp. Each of the processed metal on the upper surface is formed by first forming a V-groove on the upper surface of each of the metal plate materials by a tool table that operates opposite to each other with the same transfer amount as the front clamp, and after releasing the clamping. Rotate the plate with the longitudinal direction of the bed as the vertical axis and place the reference plane on the other setting block to set and clamp The lower surface that has not been processed is exposed to the upper side by forming a V-groove on the lower surface of each metal plate by the restored tool table, and the angle, interval, and position of the same V-groove are set. A V-groove processing method for a metal plate by a V-groove processing apparatus having a twin tool stand and a twin clamp, which simultaneously completes a pair of metal plates having the same, is provided.

  The V-groove processing apparatus and the V-groove processing method having the twin tool table and the twin clamp according to the present invention as described above can simultaneously process two metal plate materials on a single bed, and the other after one side processing. At the time of side processing, the same setting point can be obtained by making one turn on the X-axis of the bed and setting it on the other setting block. Obtainable.

  In addition, the rotation work of the metal plate is relatively simple and one person can work alone, so that the number of workers can be reduced and the setting time of the metal plate is large while processing two metal plates at the same time. Since it decreases, the production amount increases dramatically, the production cost is reduced, and the expensive processing apparatus can be used more efficiently, so that it has a very economical effect.

Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 3 is an overall schematic perspective view of the V-groove processing apparatus according to the present invention, and FIG. 4 is a plan view of the V-groove processing apparatus according to the present invention.
In the V-groove processing apparatus according to the present invention, a rectangular bed 20 is provided on the upper surface of the main body 10, and a plurality of side clamps 40, 40 ′ are provided on the setting block 30 on one side of the bed 20. A separate front clamp 50 is provided, and a tool base 70 that moves to the left and right is mounted on the carriage 60 that moves above the bed 20.

Opposing setting blocks 30 and 30 ′ are respectively provided on both side ends of the bed 20, and a plurality of side clamps 40 and 40 ′ that are moved up and down by a hydraulic cylinder 41 are provided facing the setting blocks 30 and 30 ′.
A pair of front clamps 50, 50 ′ that are lifted and lowered by another hydraulic cylinder 51 are provided at one end of the bed 20, and each front clamp 50, 50 ′ is built inside the main body 10, It is rotated by a clamp reversible motor 52 and is screwed into a clamp transfer screw 53 in which a screw thread is formed in both directions with respect to the center, and is operated simultaneously.

A pair of tool bases 70 and 70 'having a cutting tool 71 at the bottom are mounted on the carriage 60 so as to be spaced apart from each other. Each of the tool tables 70 and 70' is mounted on the carriage 60, and the tool table at one end is reversible. It is rotated by a motor 72 and is screwed into a tool table transfer screw 73 in which a screw thread is formed in both directions with respect to the center and is simultaneously operated.
When the clamp reversible motor 52 and the tool table reversible motor 72 are actuated by receiving power from a control box 80 located at one end of the carriage 60, the pair of front clamps 50, 50 ′ and the pair of tool tables 70, 70 'is configured to be simultaneously approached / separated with the same separation width to simultaneously form a V-groove in the pair of metal plates 100, 100', and the other end of the bed 20 is recessed from the upper surface of the main body 10. Chip collection box 90 is provided.

Subsequently, the V-groove machining method of the present invention using the V-groove machining apparatus of the present invention having such a configuration will be described with reference to the accompanying drawings.
First, the upper bed 20 of the main body 10 is divided by a virtual line at the center, and symmetrical setting blocks 30 and 30 ′ and side clamps 40 and 40 ′ are mounted on both sides, respectively. The setting blocks 30 and 30 'are for obtaining a stable V-groove processing dimension by bringing the reference surfaces of the metal plate materials 100 and 100' into close contact with them.

  The side clamps 40, 40 ′ are for clamping the metal plate materials 100, 100 ′ on which the reference surface is set so that they cannot move freely. The side clamps 40 and 40 'have a structure that is moved up and down by a separate hydraulic cylinder 41. The side clamps 40 and 40' are positioned at the tip of the hydraulic cylinder 41. The side clamps 40 and 40 ' The metal plate members 100, 100 ′ placed on the upper one side of the bed 20 are firmly clamped by lowering the side clamps 40, 40 ′ by the operation of the hydraulic cylinder 41 by being exposed on each upper side of the 30 ′. It has a structure that can.

FIG. 5 is an enlarged perspective view showing the front clamp portion of the V-groove machining apparatus according to the present invention.
The pair of front clamps 50, 50 ′ are attached to a clamp transfer screw 53 built in the main body 10, and are simultaneously moved close to or away from each other by the rotation of the clamp transfer screw 53.

Since the clamp transfer screw 53 is formed with a screw thread in both directions with respect to the center thereof, when the clamp transfer screw 53 is rotated by the operation of the clamp reversible motor 52 at one end, a pair of front clamps 50 attached thereto, 50 'will be close or separated at the same time depending on the thread formation direction.
Thus, the hydraulic cylinder 51 is mounted on the pair of front clamps 50, 50 ′ that move simultaneously in opposite directions, and the tips of the clamps 50, 50 ′ are raised and lowered by the operation of the hydraulic cylinder 51. The metal plate materials 100 and 100 ′ to be processed can be clamped by raising and lowering.

FIG. 6 is an enlarged perspective view showing the carriage and tool table of the V-groove processing apparatus according to the present invention.
The pair of tool tables 70 and 70 ′ are mounted on a tool table transfer screw 73 that is fixed in the transverse direction across the carriage 60. By the rotation of the tool table transfer screw 73, the pair of tool tables 70, 70 ′ are simultaneously brought close to or separated from each other.

Since the tool table transfer screw 73 is formed with screw threads in different directions with respect to the center, the pair of tool tables 70 and 70 ′ attached to the tool table transfer screw 73 is a tool table transfer screw. At the time of rotation of 73, it approaches or separates in different directions.
The tool table transfer screw 73 is rotated by receiving power from a separate tool table reversible motor 72 built in one side of the carriage 60.
Further, the cutting tool 71 mounted on the lower part of the tool table 70, 70 'cuts the surface of the metal plate material 100, 100' at its cutting end, and preferably cuts three cutting tools having different lengths. Stable and smooth V-grooves are formed by sequentially mounting in the direction and sequentially performing cutting with different depths.

When a V-groove is to be formed in the metal plate members 100 and 100 ′ using the V-groove processing apparatus as described above, first, the pair of metal plate members 100 and 100 ′ to be processed are set on both side setting blocks 30 of the bed 20. , 30 'and the reference plane is determined.
At this time, since the metal plate members 100 and 100 ′ are cut by the same cutting device, even if it has a form in which one side is swollen and the other side is recessed, they all have the same form.

  Accordingly, as shown in FIG. 7a, any one of the metal plate members 100, 100 ′ has its cut surface in close contact with the setting block 30 on one side so that it does not move. The sheet metal plate 100 ′ is rotated, and the concave cut surface is set in close contact with the other setting block 30.

Thereby, on the upper part of the bed 20, the two metal plate members 100 and 100 ′ are in close contact with the setting blocks 30 and 30 ′ on both sides based on the cut surface on the same side, and the respective metal plate members 100 and 100 are attached. 'Everyone has the same upper surface exposed on the upper side.
In this state, by applying hydraulic pressure to the hydraulic cylinders 41 of the side clamps 40, 40 ′, if the respective metal plate materials 100, 100 ′ are clamped, they are firmly fixed without floating.

  When the fixing of the metal plate materials 100, 100 ′ by the side clamps 40, 40 ′ is completed, the pair of tool tables 70, 70 ′ can be changed according to the input numerical value of the control box 80 formed on one side of the carriage 60. After moving on the Y-axis of the bed 20 and adjusting the processing position and adjusting the processing position, the hydraulic pressure is applied to the hydraulic cylinders 51 of the front clamps 50 and 50 'to form a V-groove. The working portions of the metal plate materials 100 and 100 ′ are clamped at the end portions of the respective metal plate materials 100 and 100 ′ to be in a work standby state.

At this time, the working positions of the front clamps 50 and 50 ′ are adjusted by the rotation of the clamp transfer screw 53. The pair of front clamps 50 and 50 ′ are moved by the same amount of movement by the clamp transfer screw 53 having screw threads in both directions. Will move in opposite directions.
If the carriage 60 moves to the other side of the bed 20 in such a work standby state, a V-groove is formed on the surface of the metal plate material 100, 100 ′ by the cutting tool 71 mounted in the tool table 70, 70 ′. Will do.

The chips of the metal plate materials 100 and 100 'generated during the cutting process of the V-groove are collected and removed by the chip collection box 90 formed in a recessed shape on the upper side of the main body 10, so that the cutting chips can be more conveniently used. Can be collected and processed.
At this time, the front clamps 50, 50 ′ and the tool bases 70, 70 ′ are simultaneously moved close to or separated from each other by the same movement amount, so that the clamp transfer screw 53 and the tool stage transfer screw 73 that move at the same rotation amount always have the same distance. Will move opposite each other.

Therefore, since the two metal plate members 100 and 100 ′ have symmetrical V-grooves processed to the same numerical value with reference to the recessed cut surface, the two metal plate members 100 and 100 ′ are It will have exactly matching V-groove positions and spacing.
Thus, when the V-groove on the upper surface is formed, the carriage 60 and the tool stands 70, 70 ′ are returned to the initial standby position, and the side clamps 40, 40 ′ and the front clamps 50, 50 ′ are released. As a result, the metal plate members 100 and 100 ′ are allowed to move freely.

In order to process the lower surface, the respective metal plate members 100, 100 ′ are rotated and fixed in close contact with the setting blocks 30, 30 ′ on the other side.
At this time, as shown in FIG. 7b, by rotating the single metal plate 100 with the longitudinal direction of the bed 20 as the longitudinal axis, the recessed cut surface is positioned on the other setting block 30 'and is clamped. The other metal plate 100 is also rotated with the longitudinal direction of the bed 20 as the longitudinal axis, so that the concave cutting reference plane is positioned in the setting block 30 on the opposite side.

As described above, when the cutting reference planes of the metal plate members 100 and 100 ′ are set in close contact with the setting blocks 30 and 30 ′ at different positions, the effect is set to the same reference line as the state before processing the upper surface. Therefore, it may be rotated twice or more as in the prior art or may not be rotated in the vertical direction.
Therefore, as described above, the metal plate materials 100 and 100 ′ set to the same reference line by the operation of only one rotation are obtained by the operation of the side clamps 40 and 40 ′, the front clamps 50 and 50 ′, and the carriage 60. After clamping, as shown in FIG. 7c, a V-groove for bending is processed.

As described above, since the metal plates 100 and 100 ′ having the V-grooves formed on the upper and lower surfaces are produced at the same time even in one operation, the productivity is greatly increased. Since the operation of rotating the metal plate members 100 and 100 ′ is greatly simplified, the working time can be shortened.
From this, it can be seen that the work output increases at least 300% and most increases by 400% or more.

  FIG. 8 shows a metal square tube formed by bending the metal plate members 100 and 100 ′ having the V-grooves formed on the upper and lower surfaces as described above, and the V-groove is formed by the same reference plane. Are prevented from being formed in a slanted shape or the lower end protrudes or shifts.

It is a schematic perspective view of a general V groove processing apparatus. It is an upper surface processing process figure after mounting a metal plate material in the conventional V-groove processing apparatus. It is process drawing which shows the state rotated primarily in order to process the lower surface of the metal plate material by which the upper surface was processed with the conventional V-groove processing apparatus. It is process drawing which shows the state rotated secondary in order to process the lower surface of the metal plate material by which the upper surface was processed by the conventional V-groove processing apparatus. It is process drawing which shows the state which turned and mounted the metal plate material rotated by the conventional V-groove processing apparatus. 1 is an overall perspective view of a V groove processing apparatus according to the present invention. It is a top view of the V-groove processing apparatus by this invention. It is an expansion perspective view of the front clamp part of the V-groove processing apparatus by this invention. It is an expansion perspective view of the carriage part of the V-groove processing apparatus by this invention. It is an upper surface manufacturing process figure of the metal plate material by this invention V-groove processing apparatus. It is process drawing which shows the state which moves the metal plate material by which the upper surface was processed. It is process drawing which shows the state which processes the lower surface of the moved metal plate material. It is an expansion perspective view of the metal square tube completed by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main body 20 Bed 30, 30 'Setting block 40, 40' Side clamp 41 Hydraulic cylinder 50, 50 'Front clamp 51 Hydraulic cylinder 52 Clamp reversible motor 53 Clamp transfer screw 60 Reciprocating table 70, 70' Tool table 71 Byte 72 Tool table Reversible motor 73 Tool table transfer screw 80 Control box 90 Chip collection box 100, 100 'Metal plate

Claims (2)

A rectangular bed 20 is provided on the upper surface of the main body 10, a plurality of side clamps 40, 40 ′ are provided on the setting blocks 30, 30 ′ on one side of the bed 20, and a separate front clamp is provided at one end of the bed 20. In the buoy groove processing apparatus in which 50, 50 'are provided, and a tool base 70 that moves to the left and right is mounted on the carriage 60 that moves above the bed 20.
Opposing setting blocks 30 and 30 ′ are respectively provided on both side ends of the bed 20, and the setting blocks 30 and 30 ′ are provided with a plurality of side clamps 40 and 40 ′ that are lifted and lowered by a hydraulic cylinder 41, respectively. A pair of front clamps 50, 50 ′ that are raised and lowered by another hydraulic cylinder 51 are provided at one end of the bed 20, and each front clamp 50, 50 ′ is built inside the main body 10, and has one end A pair of tools having a cutting tool 71 at the bottom of the carriage 60 is rotated by a reversible clamp motor 52 and screwed into a clamp transfer screw 53 having a thread formed in both directions with respect to the center. The bases 70 and 70 ′ are mounted separately, and the respective tool bases 70 and 70 ′ are mounted on the carriage 60. It is rotated by a tool table reversible motor 72 at one end, screwed into a tool table transfer screw 73 formed with a screw thread in both directions with respect to the center, and simultaneously operated to be positioned at one end of the carriage 60. When the clamp reversible motor 52 and the tool table reversible motor 72 are actuated by receiving power from the control box 80, the pair of front clamps 50, 50 ′ and the pair of tool tables 70, 70 ′ simultaneously approach or separate at the same separation width. A pair of metal plates 100 and 100 ′ are formed so as to form a V-groove at the same time, and the other end of the bed 20 is provided with a chip collection box 90 that is depressed from the upper surface of the main body 10. A buoy groove processing device having a twin tool rest and a twin clamp. One side in the longitudinal direction of the metal plate material is set as a setting reference surface, and the same cut side surface of the two metal plate materials is in close contact with the setting blocks formed on both sides in the vertical direction of the bed, and these are clamped by facing each other with a side clamp. With a pair of front clamps operating opposite to each other, the processing start end of the metal plate material is clamped, respectively, and a tool base positioned vertically above the front clamp and operating opposite to each other with the same transfer amount as the front clamp. The V-grooves are primarily formed on the upper surfaces of the respective metal plates, and after releasing the clamping, the respective metal plates processed on the upper surface are rotated about the longitudinal direction of the bed as the vertical axis. By setting and clamping with the reference surface positioned on the setting block, the unmachined lower surface is exposed upward. In addition, V-grooves are further formed on the lower surface of each metal plate by the restored tool table, and a pair of metal plates having the same V-groove angle, spacing, and position are simultaneously completed. A V-groove processing method for a metal plate material by a V-groove processing apparatus having a twin tool rest and a twin clamp.