CN116079358A - Processing technology of aluminum profile hot extrusion porous split die - Google Patents

Abstract

The invention discloses a process for processing an aluminum profile hot extrusion porous splitter die, which relates to the production field of aluminum profile extrusion die processing, including pretreatment, CNC rough machining, heat treatment, finish turning, CNC finish machining, wire cutting, electric spark , heat treatment, sanding, grinding, storage. The invention discloses a process for processing an aluminum profile hot extrusion porous splitter die, which improves the processing efficiency and reduces the processing cost.

Description

Processing Technology of Aluminum Profile Hot Extrusion Porous Die

technical field

The invention relates to the production field of aluminum profile extrusion die processing technology, in particular to a processing technology of aluminum profile hot extrusion porous splitter die.

Background technique

Aluminum profile hot extrusion dies can be divided into flat dies and split dies according to the cross-sectional shape of the profiles, and split dies can be divided into single-hole dies and multi-hole dies. The production cycle of aluminum extrusion dies and the processing quality of the dies are very important. Problems such as low precision of the working belt, too large or too small empty knife, and low hardness of the mold will cause various defects in the hot extrusion process of aluminum profiles. In the existing split mold processing technology, after the main heat treatment, the method of electric discharge machining is used to cover the upper mold core, and the hole, diversion groove and lower mold are punched with an empty knife, and the tool electrodes are all made of copper. . Using the above method to process the extrusion die has slow processing efficiency and high processing cost, resulting in a long processing cycle of the extrusion die, and at the same time, the overall strength of the die is not high.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a process for processing aluminum profile hot extrusion porous splitter dies.

Technical solution: In order to achieve the above purpose, a process for processing an aluminum profile hot extrusion porous splitter die includes the following steps:

(S1) Pre-processing: picking, rough turning, scribing, drilling, and processing the outer circle, seam, and side lifting holes of the upper and lower dies;

(S2) CNC rough machining: upper die rough milling core, diversion hole, upper and lower empty knife working belt, drilling positioning pin holes; lower die rough milling welding chamber, exit empty knife, drilling positioning pin;

(S3) Heat treatment: perform heat treatment on the upper and lower molds according to the technical requirements, the heat treatment includes quenching treatment and tempering treatment arranged in sequence, and the mold hardness requirement is HRC47-49;

(S4) Finish turning: finish turning of the upper and lower dies and the size of the seam ends;

(S5) CNC finishing: fine milling of the upper mold with upper and lower empty knife working belts, outer frame of the core, positioning pin holes to size, fine milling and welding chamber of the lower mold, end face of the exit working belt, positioning pin holes to size;

(S6) Wire cutting: the upper mold hole is processed by horizontal wire cutting, and the lower model cavity is processed to size by vertical wire cutting;

(S7) Electric spark: the upper mold sets the overall size of the core, and uses a graphite rod to electrocute the diversion part;

(S8) heat treatment: stress relief is carried out to the mould;

(S9) Sanding: remove the burrs in the mold processing, the oxide layer formed by heat treatment, and the sharp corners are blunt;

(S10) Grinding: After the upper and lower molds are assembled, inspect the wall thickness processing dimensions, finely grind the working belt, and polish the working belt;

(S11) storage.

Preferably, in the step (S2), a margin of 1 mm is left on the end face of the overall working belt of the upper and lower dies during rough milling, a margin of 0.4 mm is left on the side during rough milling of the welding chamber, and a margin of 1 mm is left on one side during rough milling of the positioning pin hole; The upper hollow knife of the rough milling upper mold can be processed with a 5° taper knife with a diameter of 3.5mm-6mm, the lower hollow knife can be processed with a T-shaped milling cutter, the forming knife with a diameter of 35mm and 28mm, and the large surface of the lower mold cavity is 6mm. ° Taper knife processing, the cantilever is processed with a 2° taper knife with a diameter of 3mm.

Preferably, the copper plate used in the step (S6) is a red copper plate with a thickness of 3mm, and the copper plate is cut and processed online in advance, and the graphite rod for electric diversion is conical, and the specification is 8-30mm in diameter, selected according to the design of the drawing Fit type.

A process for processing aluminum profile hot extrusion porous splitter dies has at least the following technical effects:

Referring to Figure 1, it is a partial diagram of the assembly of the upper and lower molds. The empty knife at the exit of the upper mold core and the empty knife at the exit of the lower mold are right-angled. Considering that if the empty knife at the exit of the upper and lower molds is too small, it is easy to scratch the aluminum profile If the upper and lower mold outlets are too large, the strength of the working belt will be weakened, causing deformation and collapse of the working belt, and the probability of cracking angles due to stress concentration will reduce the service life of the mold. As shown in Figure 2, from the outside to the inside are the empty knife line at the exit of the lower mold, the cavity line of the lower mold, the core line of the upper mold, and the empty knife line at the exit of the upper mold. The overall structure adopts a 5° taper structure, but the cantilever has an empty knife and the tongue ratio is large, so it cannot be processed according to a 5° bevel. It is optimized to a 2° bevel to ensure the support of the cantilever. During processing, 5° forming knife and 2° forming knife are used to process empty knife, which replaces EDM, so as to improve processing efficiency and reduce processing cost.

Description of drawings

Fig. 1 is the structural cross-sectional view of upper mold and lower mold described in the present invention;

Fig. 2 is the structural representation of the product processed by this mold;

In the figure, 1. upper die; 2. lower die; 3. diversion hole; 4. welding chamber; 5. piercing hole.

Detailed ways

The principles and features of the present invention will be described below in conjunction with FIGS. 1 to 2 , and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

A process for processing an aluminum profile hot-extruded porous splitter die, comprising the following steps:

(S1) Pre-processing: material picking, rough turning, scribing, drilling, and machining the outer circles, seams, and side lifting holes of the upper mold 1 and the lower mold 2. This processing step is mainly the preparation work before the workpiece processing and the rough machining of the contour.

(S2) CNC rough machining: upper mold 1 rough milling core, split hole 3, upper and lower empty knife working belts, drilling positioning pin holes; lower mold 2 rough milling welding chamber 4, exit empty knife, drilling positioning pins; among them, Leave a margin of 1mm for the end face of the overall working belt of the upper and lower molds 2 during rough milling, 0.4mm for the sides when rough milling the welding chamber 4, and leave a margin of 1mm for one side when rough milling the positioning pin holes; rough milling for the upper mold 1 The cutter can be processed with a 5°taper cutter with a diameter of 3.5mm-6mm, the lower hollow cutter is processed with a T-shaped milling cutter, the forming cutter with a diameter of 35mm and 28mm, and the large surface of the lower mold 2 cavity is processed with a 6mm 5°taper cutter , The cantilever is processed with a 2° taper knife with a diameter of 3mm.

(S3) heat treatment: perform heat treatment on the upper and lower molds 2 according to the technical requirements, the heat treatment includes quenching treatment and tempering treatment arranged in sequence, and ensures that the hardness of the mold requires HRC47-49;

(S4) Finish turning: finish turning seam end face and seam size of upper and lower mold 2;

(S5) CNC finishing: upper mold 1 fine milling upper and lower empty knife working belt, core outer frame, positioning pin hole to size, lower mold 2 fine milling welding chamber 4, exit working belt end face, positioning pin hole to size;

(S6) Wire cutting: the upper mold 1 piercing hole 5 is processed by horizontal wire cutting, and the lower mold 2 cavity is processed to size by vertical wire cutting; the copper plate used is a 3mm thick copper plate, and the copper plate is online in advance After cutting and processing, the graphite rod for electric diversion is conical, and the specification is 8-30mm in diameter. Select the appropriate type according to the design of the drawing.

(S7) Electric spark: 1 set of upper mold to punch the overall size of the core, and use a graphite rod to punch the diversion part;

(S8) heat treatment: stress relief is carried out to the mould;

(S9) Sanding: remove the burrs in the mold processing, the oxide layer formed by heat treatment, and the sharp corners are blunt;

(S10) Grinding: After the upper and lower molds 2 are assembled, inspect the wall thickness processing dimensions, finely grind the working belt, and polish the working belt;

(S11) storage.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (3)

1. A processing technology of aluminum profile hot extrusion porous splitter die, is characterized in that, comprises the following steps: (S1) Pre-processing: picking, rough turning, scribing, drilling, and processing the outer circle, seam, and side lifting holes of the upper and lower dies; (S2) CNC rough machining: upper die rough milling core, diversion hole, upper and lower empty knife working belt, drilling positioning pin holes; lower die rough milling welding chamber, exit empty knife, drilling positioning pin; (S3) Heat treatment: perform heat treatment on the upper and lower molds according to the technical requirements, the heat treatment includes quenching treatment and tempering treatment arranged in sequence, and the mold hardness requirement is HRC47-49; (S4) Finish turning: finish turning of the upper and lower dies and the size of the seam ends; (S5) CNC finishing: fine milling of the upper mold with upper and lower empty knife working belts, outer frame of the core, positioning pin holes to size, fine milling and welding chamber of the lower mold, end face of the exit working belt, positioning pin holes to size; (S6) Wire cutting: the upper mold hole is processed by horizontal wire cutting, and the lower model cavity is processed to size by vertical wire cutting; (S7) Electric spark: the upper mold sets the overall size of the core, and uses a graphite rod to electrocute the diversion part; (S8) heat treatment: stress relief is carried out to the mould; (S9) Sanding: remove the burrs in the mold processing, the oxide layer formed by heat treatment, and the sharp corners are blunt; (S10) Grinding: After the upper and lower molds are assembled, inspect the wall thickness processing dimensions, finely grind the working belt, and polish the working belt; (S11) storage. 2. The processing technology of aluminum profile hot extrusion porous splitter die according to claim 1, characterized in that, in step (S2), the rough milling of the upper and lower mold integral working belt end faces leaves a margin of 1mm, and the rough milling of the welding chamber Leave a margin of 0.4mm on the side during rough milling, and leave a margin of 1mm on one side during rough milling of the positioning pin hole; the upper knife of the rough milling upper mold can be processed with a 5° taper knife with a diameter of 3.5mm-6mm, and the lower hollow knife can be processed with a T-shaped milling cutter Processing, forming tools with a diameter of 35mm and 28mm, the large surface of the lower mold cavity is processed with a 6mm 5° taper cutter, and the cantilever is processed with a 3mm diameter 2° taper cutter. 3. according to claim 1, the processing technology of aluminum profile hot extrusion porous splitter die is characterized in that, the copper plate used in the step (S6) is a red copper plate with a thickness of 3 mm, and the copper plate is cut and processed in advance online, and the electric The graphite rod for diversion is conical, with a diameter of 8-30mm, and the appropriate type is selected according to the design of the drawing.

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