JP2960647B2 - Method of manufacturing tensile test piece of sheet metal material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a tensile test piece of a sheet metal material.

[0002]

2. Description of the Related Art At present, in a mechanical test of a thin steel plate, automation of a test process and systematization of data processing are progressing, and efforts are made to save labor and increase the efficiency of production control. At this time, the test piece processing is composed of shearing by a punching press and parallel part cutting of a tensile test piece, and it is desired to realize an integrated automatic system that connects all processes from individual automatic to each. It has been reported. Among these methods, there are two methods of parallel part cutting of a tensile test specimen: (1) a conventional lot-unit laminating method and (2) a single item processing method disclosed in Japanese Patent Publication No. 3-54779. .

The lot-by-lot laminating method (1) has problems in the automatic alignment of test specimens before cutting and the separation of single test specimens after cutting, which hinders complete automation.
In addition, in the single-piece processing method of the above (2), as the size of the test piece increases, the number of clamping devices increases and the automatic line becomes complicated. With diversification such as ductility evaluation, test mode switching frequency increases or test equipment becomes redundant, which hinders the efficiency of the test process.

[0004] In an automatic mechanical test system for continuously collecting a plurality of test specimens from one test material, as described above, the test specimens after shearing are sorted according to test items and test specimen sizes, and the lots are sorted. A knitting step is required, and therefore, it is an essential requirement to realize an automatic processing method of a tensile test specimen capable of performing a batch cutting process by laminating thin test specimens.

[0005]

In the production of a tensile test piece of a thin steel sheet, a parallel portion to be machined at the center of the test piece is JIS in order to more accurately evaluate the mechanical properties of the product.
Prerequisite is to finish with high precision within the standard. That is, in addition to dimensional accuracy, it is necessary to stably obtain cutting properties that do not affect the quality, such as the roughness of the cut surface, the size of burrs, work hardening, and the processing temperature.

In systematization of a series of mechanical test processes from production of a test piece to testing and data processing, tracking management for each test piece is an essential requirement. In the cutting process, a phenomenon in which the test pieces come into close contact with each other due to the clamping force at the time of cutting and the two test pieces are supplied to the test process in an overlapping state easily occurs. Preventing this tracking error is an issue of consistent automation.

[0007]

The method for producing a tensile test piece of a sheet metal material according to the present invention relates to the production of a test piece for continuously collecting one or more kinds of test pieces from a test material. Lots are organized by test piece size, cut in lots, and supplied to the test process.The process of primary sorting from punched test materials into tensile and non-tensile test specimens And a step of labeling a bar code on the primary sorted tensile test pieces, a palletizing step of knitting a lot including the upper and lower dummy pieces according to test items and test piece types, and a palletizing step. It consists of a process of cutting the parallel part of the test piece for each subsequent lot.

[0008] The cutting process includes an aligning process for forcibly aligning the end faces in the length and width directions of a thin plate test piece formed in a lot before processing, a process for collectively dry-cutting an overlapped lot, and a test after the cutting. It is intended to provide a method of manufacturing a thin plate tensile test piece, which is constituted by a separation step of forcibly separating pieces. That is, in order to prevent tracking inconsistency due to stacking of test pieces, a bar code is attached to the end of the test piece after the shearing and palletizing.
After cutting, the barcode is read to identify the actual product when loading one sheet in front of the testing machine. In addition, in order to eliminate the overlapping phenomenon of two sheets caused by overlapping cutting and to supply one sheet to the automatic tensile test without fail, the test piece lot after cutting is vibrated to the test piece with a separating device with a vibrator to make close contact. The thin plate test piece in the state is separated.

Next, in order to ensure the processing quality of the test piece, when forming the test piece in a lot, dummy pieces having the same size as the test piece are inserted into the lowermost surface and the uppermost surface, and burrs generated by cutting work. Is received by a dummy piece to prevent the test piece from being generated. In addition, the parallel parts are processed at equal positions without center deviation in both the width and length directions of the specimen before cutting, and the stacked specimens before cutting are tested with an aligning device with a vibrator to prevent abnormal test values. This is a method of forcibly aligning the pieces in the width and length directions while applying vibration to the pieces. The cutting process uses a barcode in the above test piece identification method, and in order to reduce the adhesion phenomenon between test pieces, perform dry end milling using compressed air for cooling during cutting and blowing chips. Things.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for manufacturing a thin plate test piece according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an automatic production line for a thin plate test piece showing a method of sorting test pieces after punching from a test material and a cutting method in an embodiment of the present invention. Test pieces P1, P2, P3 and Pn corresponding to test items specified in advance are punched out from the test material P0 by a punching press or the like, and sent to the primary sorting step. In this step, the test pieces are sorted by a primary sorting robot 1 into punched finish test pieces and tensile test pieces. The former non-tensile test pieces are pallets 3 for punched finish test pieces, which are dedicated pallets provided for each test piece shape. And transported to each test facility. On the other hand, the latter tensile test specimens are sequentially transferred to a conveyor 2 with a bar code label for identifying test specimens, and a bar code labeler 4 labels an end of the test specimen with a unique number in test specimen units.

Next, the test pieces are sorted according to test items and test piece sizes in a palletizing process. That is, the specimen is sucked by the palletizing robot 5 and the pallets 7-1 and 7 for tensile test specimens arranged on the shelf of the pallet stacker 6.
-N is stored based on the sorting information. At that time, in order to avoid burrs generated in the test piece main body at the time of cutting, a dummy piece 8 having the same size as the test piece is loaded on the uppermost face after the lowermost face and the number of lots have been formed to form a lot. The number of knitting is arbitrarily selected as a control amount of the system based on a unit for receiving the test material determined in the test period and a storage amount of the pallet 7-n.

The pallet 7-n for which the lot formation has been completed is sent from the pallet stacker 6 to the cutting step via the pallet delivery conveyor 9 as needed. The cutting process comprises a pallet delivery conveyor 9 for receiving a pallet before cutting and unloading the pallet after cutting, a test robot lot NPn for taking out a test piece lot NPn from the pallet, and setting the cutting process to each cutting process, and main cutting equipments 11, 12, and 13. . That is, before and after a cutting device 12 which is a parallel part cutting end mill, an aligning device 11 for a pre-cut test piece and a separating device 1 for a post-cut test piece are used.
No. 3 is arranged to enable the lot processing of the thin plate test piece.

Next, details of each step will be described with reference to FIG. FIG. 2 is a view showing a state where a bar code 15 for identification is attached to the test piece Pn. The test piece Pn transferred to the barcode label pasting conveyor 2 is positioned in front of the labeler 4 and affixes the barcode 15 to one end which does not affect the test value. FIG. 3 is a diagram showing a state in which a group of test pieces NPn palletized according to test items and test piece sizes is stored in a predetermined pallet 7-n. The test piece lot NPn is loaded with the dummy pieces 8 on the upper and lower surfaces, and is stacked neatly in the positioning pallet stanchion 26 at the center of the pallet. At this time, the test piece lot is stored on the same pallet before and after cutting, thereby facilitating pallet unit tracking.

FIG. 4 is a three-dimensional view of a main part of a test piece aligning apparatus 11 arranged before cutting. The apparatus comprises a test piece receiving table 16 and a vibration device 17 attached to a lower portion thereof.
The test piece guide device 18 for supporting the test piece group according to the stacking height, the extension stroke adjusting device 21 thereof, the length direction aligning devices 19 and 19 ′ of the test piece group, and the width direction of the test piece group. It is composed of a width direction aligning device 20 pressed against the surface of the receiving table 16.

The pre-cut test specimen group NPn picked up from the pallet by the processing robot 10 is set on the test specimen receiving table 16 in a vertically stacked posture. Thereafter, the pedestal is rotated by 90 degrees to bring the test specimen group into a strip-like self-standing posture. At this time, the test piece guide device 18 is set so as to prevent the test pieces from falling down and to maintain an appropriate gap in the stacking direction. In this state, the aligning devices 19 and 20 are intermittently acted on the test piece group while applying vibration with the vibration device 17 to align the test piece group in the length and width directions.

FIG. 5 is a perspective view of the parallel part cutting device 12 and shows a state diagram in which a test piece is cut in lots by an end mill. The test specimen group NPn arranged by the aligning device 11 is set on the clamp jig 23 by the machining robot 10 in a vertically stacked posture. Based on cutting information determined in advance for each test piece size, parallel portions are machined on both sides of the test piece by the combination operation of the end mill drill 24 and the cutting table 22. At this time, compressed air is blown from a hose and a nozzle 25 attached adjacent to the end mill drill 24 for cooling and chip blowing. The post-cut test specimen separation device 13 separates the close contact state and the overlap state between the test specimens while applying vibration to the test specimens with the vibration device 17 having the same mechanism as the test specimen aligning apparatus 11 described above. . After that, the pallet is stored again in the pallet by the processing robot 10 and supplied to the test process by the pallet delivery conveyor 9 and the automatic carrier.

[0017]

According to the present invention, a lot processing of a thin plate test piece can be performed, and an efficient automatic line can be obtained over a cutting process and a test process. In the tracking of the test piece, the barcode method is used for identifying the actual product in addition to the computer instructions for controlling and managing the entire process, thereby enabling reliable reading and collation before the test.
In addition, by applying vibration to the test pieces with an aligning device with a vibrator before laminating the thin plate, the end face of the test piece lot may become uneven due to projections such as burrs generated on the end face during shearing by the aligning method. Overcome.

Further, by vibrating the test piece lot after cutting with a vibrator, the two overlapping test pieces are separated from each other due to the difference between the minute impact force and the natural frequency between the test pieces. It becomes possible to cut and supply one sheet at a time. The cutting method employs a dry cutting method that does not use cutting oil, so that the above-mentioned bar code for specimen identification is not wet, and that the cutting oil penetrates between the specimens and induces two-sheet overlap. It has the effect of preventing. At this time, by blowing compressed air to the cutting portion, the temperature rise due to the cutting process is suppressed, and chips are removed, so that a cutting process that does not affect the quality of the test piece is obtained.

The method for producing a tensile test piece for a thin plate according to the present invention is an integrated automatic mechanical test for producing a specified test piece from a test material continuously or randomly sent from a thin plate production line and producing it. , Sorts test specimens according to test items and test specimen size, and supplies cutting finish processing and automatic test for each sorting lot unit.Efficiently arranges processing equipment and test equipment in the field of various thin plate mechanical tests And an automatic test line with high reliability and high automation rate.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a bar code is attached to a test piece before cutting.

FIG. 3 is a perspective view exemplifying a state of test pieces sorted in lot units and stored in a pallet.

FIG. 4 is a perspective view illustrating a method for aligning a specimen before cutting and separating a specimen after cutting.

FIG. 5 is a perspective view illustrating an end mill for cutting a parallel portion.

[Explanation of symbols]

 P0 Test material P1, P2 Tensile test piece P3 Punched finish test piece NPn Lot organization test piece group 1 Primary sorting robot 2 Labeler conveyor 3 Pallet for punched finish test piece 4 Barcode labeler 5 Palletizing robot 6 Pallet stacker 7n Tensile test Pallet for piece 8 Dummy piece 9 Pallet delivery conveyor 10 Processing robot 11 Aligning device 12 Cutting device 13 Separation device after cutting 14 Test piece pallet after cutting 15 Bar code 16 Receiving stand 17 Vibration device 18 Test piece guide device 19, 19 ' Length aligning device 20 Width aligning device 21 Test piece guide extension stroke adjusting device 22 Cutting table 23 Clamp jig 24 End mill drill 25 Air hose and nozzle 26 Pallet stanchion

Continued on the front page (72) Inventor, Osamu Fujii 1 Kimitsu, Kimitsu-shi Nippon Steel Corporation Kimitsu Works (72) Inventor Yuya Kikuta 1038-2 Hitomi, Kimitsu-shi Yoshikawa Industries, Ltd. Kimitsu Branch (72) Inventor Haruo Kinoshita 3-1-1 Yukicho, Hitachi City Hitachi, Ltd. Hitachi Plant (72) Inventor Yuichi Yamamoto 4-13-17 Nakagawa, Adachi-ku, Tokyo Hitachi Techno Engineering Co., Ltd. FA Business Unit (58 ) Surveyed field (Int.Cl. ⁶ , DB name) G01N 1/28 G01N 3/08

Claims (2)

(57) [Claims] 1. A test piece manufacturing method for continuously collecting one or more kinds of test pieces from a thin steel sheet test material,
A step of primary sorting from a test material after punching into a tensile test specimen and a non-tensile test specimen, a step of labeling a barcode on the primary sorted tensile test specimen, and a step of labeling the tensile test specimen after labeling. A palletizing step of knitting a lot including upper and lower dummy pieces for each test item and test piece type, and a step of cutting parallel parts of the test piece in lot units after palletizing. Test piece production method. 2. The cutting step includes an aligning step of forcibly aligning the end faces in the length and width directions of the thin plate test pieces formed in a lot before processing, a step of collectively dry-cutting the overlapped lot, and a step of after-cutting. 2. The method for producing a tensile test piece of a thin metal material according to claim 1, wherein the method comprises a separating step of forcibly separating the test piece.