TWI680023B - Die for metal tube extrusion - Google Patents

Abstract

A metal pipe extrusion die is used to extrude a plurality of metal materials into a plurality of sequentially connected metal pipes. The metal pipe extrusion die is provided with a plurality of slow-flow protrusions. Partly buffer each metal material passing through the metal tube extrusion die, and change the flow direction of each metal material in the metal tube extrusion die, so as to reduce a pending removal of adjacent metal tubes containing an irregular connection interface. The length of the metal pipe section to avoid wasting the metal material after cutting off the metal pipe section to be removed.

Description

Metal pipe extrusion die

The invention relates to a metal pipe extrusion die, in particular to a metal pipe extrusion die for reducing the length of a metal pipe section including an irregular connection interface.

In the Republic of China Invention Patent No. 105116351, a "die for extruding a metal pipe" is disclosed. Please refer to Fig. 1. In the metal pipe extrusion process, a plurality of metal materials are sequentially placed in an extrusion die to Extruded into interconnected metal pipes 10, an irregular connection interface 11 will be formed between adjacent adjacent metal pipes 10. The irregular connection interface 11 will affect the strength of the metal pipe, so it is necessary to have The metal pipe section 10a of the regular connection interface 11 is cut away. However, cutting off the metal pipe section 10a containing the irregular connection interface will cause waste of metal materials.

The metal pipe extrusion die of the present invention is used to reduce the length of a metal pipe section to be removed that includes an irregular connection interface between adjacent metal pipes.

The main object of the present invention is to provide a metal tube extrusion die for extruding a plurality of metal materials into a plurality of sequentially connected metal tubes. The metal tube extrusion die includes a diverting mold portion and a forming mold portion. The shunt mold part has a ring wall, a column and a plurality of trusses, the ring wall surrounds the column, and the trusses are connected to the column and the ring wall, respectively, so that a shunt is formed between adjacent trusses. Each of the diverting props has an inlet and an outlet. The cylinder has a tube extrusion portion and a plurality of slow-flow protrusions. Each of the slow-flow protrusions is convexly disposed on a surface of the cylinder. A forming die part is coupled to the shunt die part, the forming die part has a first through hole and a second through hole, the first through hole communicates with the second through hole, and the second through hole communicates with each of the shunt channels In the discharge port, the tube extrusion part of the cylinder is accommodated in the first through hole to form a tube forming flow channel, and each of the slow-flow convex portions is located above the tube forming flow channel.

The invention buffers the metal material passing through the shunt mold part by the slow-flow protrusions, avoids the metal material from flowing directly along the column to the tube forming flow channel, and changes the metal by each slow-flow protrusion. Material flow to reduce the length of a metal pipe section containing an irregular connection interface between adjacent metal pipes, which can avoid the metal material caused by cutting away the metal pipe section containing the irregular connection interface. waste.

Please refer to FIG. 2, which shows a die 100 for extruding a metal pipe according to the present invention, which includes a diverting die portion 110 and a forming die portion 120. The die 100 is combined with the diverting die portion 110 and an ingot bucket 200. The metal material 300 is sequentially placed in the ingot bucket 200, and each of the metal materials 30 is sequentially extruded into the mold 100 with an extrusion head 400 to extrude a plurality of metal pipes connected in sequence.

Please refer to FIGS. 3 and 4, the split mold part 110 has a ring wall 111, a column 112, and a plurality of trusses 113. The ring wall 111 surrounds the column 112, and the trusses are connected to the column 112 respectively 113. And the ring wall 111, a shunt 114 is formed between the adjacent trusses 113, each shunt 114 has an inlet 114a and an outlet 114b, and the pillar 112 has a tube extrusion 112a A welding portion 112b, a shunt portion 112c, and a plurality of slow-flow convex portions 112d, the welding portion 112b is located between the pipe extrusion portion 112a and the shunt portion 112c, and each of the shunt channels 114 is located in the shunt portion 112c Between the annular wall 111 and the annular flow protrusions 112d are protruded from a surface 112e of the pillar 112. Preferably, the retarded protrusions 112d are arranged at equal intervals on the surface of the pillar 112. 112e.

Referring to FIGS. 3 and 4, the forming mold portion 120 is coupled to the diverting mold portion 110. The forming mold portion 120 has a first through hole 121 and a second through hole 122. The first through hole 121 communicates with the first through hole 121. Two through holes 122, the second through holes 122 communicate with the discharge opening 114b of each of the branch channels 114, and the tube extrusion portion 112a of the cylinder 112 is received in the first through hole 121 to form a tube forming flow Channel 123, the welding portion 112b of the pillar 112 is located in the second through hole 122 to form a welding chamber H, each of the slow-flow convex portions 112d is located above the tube forming flow channel 123, and each of the slow-flow convex portions 112d The flow convex portions 112d are located below the discharge outlet 114b of each of the shunts. Preferably, each of the flow convex portions 112d is disposed in the welding portion 112b, and each of the flow convex portions 112d is located in the welding chamber H. in.

Please refer to FIGS. 3 and 4. In this embodiment, the tube extrusion portion 112 a has an annular extrusion flange 112 h, the annular extrusion flange 112 h has an annular wall 112 k, and the annular wall 112 k faces the forming. The mold part 120, the ring-shaped extrusion flange 112h is located in the tube forming flow channel 123, and each of the slow-flow convex portions 112d is located between the ring-shaped extrusion flange 112h and the inlet 114a of each of the branch channels 114 Preferably, each of the slow-flow protrusions 112d is located between the annular extrusion flange 112h and the discharge opening 114b of each of the diverting channels 114.

Please refer to FIGS. 3 and 4, each of the slow-flow protrusions 112d has a slow-flow surface 112f and a diversion slope 112g, and the diversion slope 112g has a first end edge 112i and a second end edge 112j. One end edge 112i is connected to the slow-flow surface 112f, and the second end edge 112j is connected to the surface 112e of the cylinder 112. Preferably, the slow-flow surface 112f faces the inlet 114a, and the diversion slope 112g faces the In the forming mold part 120, the slow-flow surfaces 112f of each of the slow-flow protrusions 112d are substantially flush with each other, and are located on the same axial plane, that is, the distance from each of the inlets 114a to the corresponding slow-flow surfaces 112f is substantially the same.

Referring to FIG. 3, a central axis L passes through the center of the column body 112. The central axis L has a first distance d1 from the annular wall 112k of the annular extruded flange 112h, and the central axis L to the There is a second distance d2 between the second end edges 112j, the second distance d2 is not greater than the first distance d1, and a third distance d3 from the central axis L to the first end edge 112i, the first distance d1 Is not greater than the third distance d3.

Please refer to FIGS. 1, 3, 4 and 5, place each metal material 300 into the ingot bucket 200, and press the metal material 300 with the extrusion head 400. Please refer to FIG. 5 to make the metal After the material 300 passes the ingot bucket 200, it abuts the column 112 and is squeezed into each of the shunts 114. Please refer to FIGS. 5 and 6. The metal material 300 passing through each of the shunts 114 is squeezed to The welding chamber H is extruded through the tube forming flow channel 123 to form a metal tube 500. Then, other metal materials 300 are sequentially placed in the ingot barrel 200 and passed through the extruded metal tube. The die 100 is extruded to form a plurality of sequentially connected metal pipes 500.

Please refer to FIGS. 5 and 6. A first metal material 300 a and a second metal material 300 b that enter the shunt channel 114 and the welding chamber H later form a mixed interface in the die 100 for extruding the metal pipe. a, by slowly flowing the second metal material 300b of each of the shunt channels 114 through each of the slow-flow convex portions 112d, after the second metal material 300b flows through the welding chamber H, and then through the tube forming flow channel 123 Being extruded, each of the slow-flow convex portions 112d protruding on the surface 112e of the pillar 112 can buffer the second metal material 300b passing through each of the shunts 114 to prevent the second metal material 300b from following the The pillar 112 directly flows to the tube forming flow channel 123, and the flow direction of the second metal material 300b is changed by each of the slow-flow convex portions 112d, so that the first metal material 300a and the second metal material 300b can be used in the welding. After the connecting chamber H is connected, the tube forming flow channel 123 is extruded. Please refer to FIG. 6. Each of the sequentially connected metal tubes 500 extruded through the die 100 for extruding the metal tube includes a A to-be-removed metal pipe section 510 of the irregular connection interface 500a is formed by each of the slow-flow protrusions 112d. The extended length of the irregular connection interface 500 a can be shortened, so the length of the metal pipe section 510 to be removed between adjacent metal pipes 500 including the irregular connection interface 500 a can be reduced. It must be cut off. Therefore, when the length of the metal tube section 510 including the irregular connection interface 500a is reduced, relatively speaking, metal waste can be avoided.

The protection scope of the present invention shall be determined by the scope of the appended patent application. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention. .

10‧‧‧ metal tube

10a‧‧‧Metal pipe section

11‧‧‧ Irregular connection interface

100‧‧‧ Mould for Extruding Metal Pipe

110‧‧‧Diverting mold department

111‧‧‧ ring wall

112‧‧‧ cylinder

112a‧‧‧ Tube Extrusion Department

112b‧‧‧ Welding Department

112c‧‧‧ Diversion Division

112d‧‧‧ Slow flow convex

112e‧‧‧ surface

112f‧‧‧ Slow surface

112g‧‧‧Diversion bevel

112h‧‧‧ Ring Extrusion Flange

112i‧‧‧first edge

112j‧‧‧ second edge

112k‧‧‧ ring wall

113‧‧‧truss

114‧‧‧ Diversion Channel

114a‧‧‧Inlet

114b‧‧‧Discharge port

120‧‧‧Forming mold department

121‧‧‧first through hole

122‧‧‧Second through hole

123‧‧‧pipe forming runner

200‧‧‧Ingot bucket

300‧‧‧ metallic materials

300a‧‧‧First metal material

300b‧‧‧Second metal material

400‧‧‧ Extrusion head

500‧‧‧ metal tube

500a‧‧‧Irregular connection interface

510‧‧‧ metal tube section to be cut

a‧‧‧connection interface

d1‧‧‧first distance

d2‧‧‧second distance

d3‧‧‧ third distance

H‧‧‧welding room

L‧‧‧ center axis

Figure 1: A perspective view of a metal pipe extruded by a conventional extrusion die. Figure 2: A perspective view of the metal tube extrusion die, ingot holder, metal material, and extrusion head of the present invention. Fig. 3: An exploded view of a metal tube extrusion die according to the present invention. Figure 4: A three-dimensional combined sectional view of a metal tube extrusion die of the present invention. Figure 5: A schematic view of a metal material being extruded into a metal tube extrusion die of the present invention. FIG. 6 is a perspective view of a metal pipe extruded by the metal pipe extrusion die of the present invention.

Claims (11)

A metal pipe extrusion die is used to extrude a plurality of metal materials into a plurality of sequentially connected metal pipes. The metal pipe extrusion die includes: a diverting mold part, which has a ring wall, a column and a plurality of trusses. The ring wall surrounds the column, and the trusses are connected to the column and the ring wall, respectively, so that a shunt channel is formed between adjacent trusses, and each shunt prop has an inlet and an outlet, The cylinder has a tube extrusion portion and a plurality of retarded convex portions, each of the retarded convex portions is protruded on a surface of the column; and a forming mold portion is combined with the diverting mold portion and the forming mold portion. There is a first through hole and a second through hole, the first through hole communicates with the second through hole, the second through hole communicates with the discharge opening of each of the shunts, and the second through hole is located at each of the Between the discharge port of the shunt channel and the first through hole, and each of the slow flow convex portions is in the second through hole, and the tube extrusion part of the cylinder is accommodated in the first through hole to form A tube forming flow channel, each of the slow-flow convex portions is located above the tube forming flow channel. According to the metal tube extrusion die described in the first item of the patent application scope, the slow-flow protrusions are arranged at equal intervals on the surface of the cylinder. According to the metal tube extrusion die described in item 2 of the scope of the patent application, each of the slow-flow protrusions has a slow-flow surface, and the slow-flow surface faces the inlet. According to the metal tube extrusion die described in item 3 of the scope of the patent application, the slow-flow surfaces of the slow-flow protrusions are substantially flush and located on the same axial plane. According to the metal tube extrusion die described in item 3 of the scope of the patent application, each of the slow-flow convex portions has a diversion inclined surface, and the diversion inclined surface faces the forming mold portion. According to the metal pipe extrusion die described in the scope of application for patent No. 1, 2, 3, 4 or 5, wherein the cylinder includes a welding portion and a diverting portion, the welding portion is located in the pipe extrusion portion and the Between the shunts, each of the shunts is located between the shunt and the ring wall, and the welding portion is located in the second through hole to form a welding chamber, and each of the slow-flow protrusions is provided at the welding. And each of the slow-flow convex portions is located in the welding chamber. According to the metal tube extrusion die described in item 1 of the scope of patent application, each of the slow-flow protrusions is located below the discharge port of each of the diverting channels. The metal pipe extrusion die according to item 1 of the patent application scope, wherein the pipe extrusion part has an annular extrusion flange, the annular extrusion flange is located in the pipe forming flow channel, and each of the slow-flow protrusions The portion is located between the annular extrusion flange and the feed inlet of each of the diverting channels. According to the metal tube extrusion die described in item 8 of the scope of the patent application, each of the slow-flow protrusions is located between the annular extrusion flange and the discharge port of each of the diverting channels. According to the metal tube extrusion die described in the patent application No. 8, one of the central axes passes through the center of the cylinder, and each of the slow-flow protrusions has a slow-flow surface and a diversion slope. The diversion mask has a first One end edge and a second end edge, the first end edge is connected to the slow flow surface, the second end edge is connected to the surface of the cylinder, and the center axis is between an annular wall of the annular extrusion flange There is a first distance, a second distance from the central axis to the second end edge, and the second distance is not greater than the first distance. According to the metal tube extrusion die described in item 10 of the patent application scope, wherein the center axis has a third distance from the first end edge, and the first distance is not greater than the third distance.