JP2844151B2 - Extruded material cutting method - 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 cutting a long extruded material extruded from a billet by an extruder.

[0002]

2. Description of the Related Art As an apparatus for extruding a long extruded material from a billet by an extruder, for example, an apparatus shown in FIG. 1 is known. That is, as shown in FIG. 1, a billet shearing device 2 and an extruder 3 are sequentially disposed on the outlet side of a heating furnace 1, and a cutting machine 4 and an extruded material conveying device 5 are disposed on the extruding side of the extruder 3. The metal material heated in the heating furnace 1 is sheared into billets of a predetermined length by a billet shearing device 2, and the billets are conveyed to an extruder 3 by conveying means 6, and extruded by an extruder 3 in the direction of arrow a. The extruded material is molded and cut by the cutter 4, and the extruded material is conveyed by the conveying device 5 in the direction of arrow b.

The extruding operation of an extruded material by the above-described extruder is performed by a push-in extrusion method as disclosed in, for example, JP-A-4-172124. That is, as shown in FIG. 2A, the billet charged into the extruder 3 is extruded while leaving a certain amount of discard in which metal oxides and the like are concentrated, and then is extruded at a predetermined position on the extrusion side. The extruded profile 7 is cut by the cutter 4 and the extruded profile 7 is conveyed in the direction of the arrow b by the conveying device 5 as shown in FIG. The extrusion is repeated as shown in FIG.

According to the push-in extrusion method, a stop mark appears when the extrusion is stopped, and the stop mark portion cannot be used as a product due to scratches, weakness in strength, and the like, and is shown in FIG. 2 (c). As described above, the portion from the preceding cut portion 7a of the extruded profile 7 to the stop mark 7b is wasted. In order to solve this problem, as shown in the above-mentioned Japanese Patent Application Laid-Open No. 4-172124, the cutting machine 4 is moved to cut the extruded material at the stop mark portion. That is, as shown in FIG.
3B and 3C, the cutting machine 4 is moved together with the extruded profile 7 when the next billet for extrusion is replenished and extruded as shown in FIGS.
After the cutting, the cutting machine 4 is returned to the original position and continuously extruded as shown in FIG. 3D.

In the case of extruded profiles extruded by the above-mentioned extruder, at the time of shipment of the product, a measurement dimension table at a specified location of the cross section of the extruded profile is attached together with data such as the serial number, type, and grade. It is defined by JIS standards.

For this purpose, for example, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent Publication No. 4 (1999) -2002, a sample cutter is provided separately from a cutting machine provided on the extrusion side of the extruder, and when the dies are exchanged, the extruded shape initially extruded is cut by the sample cutter to obtain a sample extruded shape. The cross section of the extruded sample is measured.

As shown in FIGS. 4 (a), 4 (b) and 4 (c), after a long extruded member 7 cut by a cutter 4 is slightly moved by a conveying means 5 in the direction of arrow b. The extruded sample 7c is cut out by the manual cutter 8, and the cross section is measured.

[0008]

As described above, in order to cut the extruded profile at the stop mark portion, a new billet is inserted, extrusion starts again, a stop mark appears from the die slot, and the stop mark moves. In synchronization, the cutting machine 4 is slid, and the extruded material extruded first after cutting must be paid out in the direction b of the conveying means, so that the extruding speed cannot be increased. That is, cutting at the stop mark position that appears for the first time when the next billet is extruded has a good yield, but productivity is poor due to the dispensing of the extruded material.

Further, when the extruded sample of the sample is cut as described above, a cutter for the sample is required in addition to the cutting machine for cutting the sample to a normal length.

Therefore, an object of the present invention is to provide a method for cutting an extruded material which can solve the above-mentioned problems.

[0011]

The billet charged in the extruder 3 is extruded by a predetermined extrusion stroke, and then the next billet is charged in the extruder 3 to perform push-in extrusion molding.
A method for cutting an extruded profile in which the cutting machine 4 is moved to a cutting position separated from the stop mark generating portion of the extruder 3 by a product length L ₂ + α. Dice exchange of the extruder 3
-Over to the cut the extruded profile by moving the cutter 4 to the sample cutting position spaced from the normal cutting position only sample extruded shape members length L _3, is cut and then move the cutter 4 in the normal cutting position A method for cutting extruded profiles to be sample extruded profiles.

[0012]

[Operation] Since the end of the extruded profile material extruded second at the time of push-in extrusion molding has a length equal to the product length + α than the stop mark portion, the product near the stop mark portion of the extruded profile is used as the product. In addition, the extruded material can be dispensed and the next billet can be replenished at the same time, thereby improving productivity. The extruded sample material can be cut using a cutting machine usually used in extrusion molding.

[0013]

[Embodiment] As shown in FIG. 5 (a), when a billet is charged into the extruder 3 and the first extrusion is performed, the extrusion is stopped after the extrusion of a predetermined length, and the cutting machine 4 is stopped.
Is moved to the cutting position X at the time of the occurrence of the stop mark, and the extruded profile 7 is cut.
Convey in the direction and pay out. The cutting position X when the stop mark is generated is a distance of the product length L ₂ + α from the stop mark generating portion Y, and the cutting position is arbitrarily controlled depending on the length of the product length. This α is about the amount of grip of a stretcher that grips and pulls the tip of the extruded profile during extrusion.

Next, when the billet is inserted and formed by push-in extrusion, as shown in FIG. 5B, the product length L is measured from the tip end surface (cross section 7e at the time of the previous cutting) of the extruded shape member 7. ₂ + α
A stop mark 7f is generated at the position, and the extruder is stopped and cut after extruding for a predetermined extruding stroke with the cutting machine 4 as the cutting position X, and the extruded material is conveyed by the conveying means 5 in the direction of arrow b. Pay out.

By doing so, the length of the end portion 7g of the extruded profile 7 beyond the stop mark portion 7f becomes the product length L ₂ + α, and the vicinity of the stop mark portion 7f can be used as a product. Since the cutting of the material 7 and the dispensing of the cut extruded material and the charging of the next billet can be performed at the same time, the productivity is improved.

Next, a method for cutting a sample extruded material at the time of die exchange or the like will be described. As shown in FIG. 6 (a), the cutting machine 4 is moved to the sample cutting position C at the time of the first extrusion molding after exchanging the dies, and after extruding by a predetermined extrusion stroke, the extruded shape 7 is cut by the cutting machine 4. I do. The sample cutting position C is than the normal cutting position X apart sample extruded shape members length L ₃ positions. As shown in FIG. 6 (b), the cutting machine 4 is moved to the normal cutting position X to cut the extruded profile into a sample extruded profile of 7g. By cutting in this manner, 7 g of the extruded sample material can be cut by one cutting machine 4.

[0017]

[Effect of the Invention] Since the tip of the extruded shape material extruded second at the time of push-in extrusion molding has a product length + α longer than the stop mark portion, a product near the stop mark portion of the extruded shape material is used as a product. The productivity can be improved because it can be used, and the extruded profile can be cut, the extruded profile can be dispensed, and the billet can be inserted at the same time. . The extruded sample material can be cut using a cutting machine usually used in extrusion molding.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of an extrusion apparatus.

FIG. 2 is an explanatory diagram of a conventional cutting method when a stop mark is generated.

FIG. 3 is an explanatory diagram of a conventional cutting method when a stop mark is generated.

FIG. 4 is an explanatory view of a conventional method for cutting a sample extruded profile.

FIG. 5 is an explanatory diagram of a cutting method according to the present invention when a stop mark is generated.

FIG. 6 is an explanatory view of a method for cutting a sample extruded profile according to the present invention.

[Explanation of symbols]

 3 extruder, 4 cutting machine, 7 extruded profile.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-97818 (JP, A) JP-A-4-172124 (JP, A) JP-A-4-167924 (JP, A) 44045 (JP, B2) JP-B 52-19822 (JP, B2) JP-B 63-19244 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21C 35/02

Claims (2)

(57) [Claims] 1. A cutting machine 4 upon押継technique extruded was charged the following billet extruder 3 after extruding the billet was charged to the extruder 3 by a predetermined extrusion stroke, the stop of the extruder 3 Mark length to product length L
_{2. A} method of cutting an extruded member, wherein the cutting is performed by moving to a cutting position separated by ₂ + α. 2. A moves to the sample cutting position spaced from the normal cutting position only sample extruded shape members length L ₃ of the cutter 4 during die replacement of extruder 3 was cut extruded profile, then the cutter 4 A method for cutting an extruded profile, wherein the extruded profile is moved to a normal cutting position and cut to obtain a sample extruded profile.