CN115740999A - Improved process for process hole of extrusion die - Google Patents
Improved process for process hole of extrusion die Download PDFInfo
- Publication number
- CN115740999A CN115740999A CN202211602612.9A CN202211602612A CN115740999A CN 115740999 A CN115740999 A CN 115740999A CN 202211602612 A CN202211602612 A CN 202211602612A CN 115740999 A CN115740999 A CN 115740999A
- Authority
- CN
- China
- Prior art keywords
- die
- hole
- improved process
- extrusion
- machining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Milling Processes (AREA)
Abstract
The invention discloses an extrusion die fabrication hole improvement process, which comprises the following steps: turning the blank into a die blank with the required shape and size; processing an outlet belt of each hole by high-precision numerical control milling; then after heat treatment and quenching, grinding a plane and finely turning an excircle; aligning according to the die hole by a milling machine, and finely machining the working tape by using a fine-tuning boring cutter; and finally, polishing on a milling machine, and finishing by using a special grinding head. According to the improved process of the extrusion die process hole, the grinding head is driven to rotate by the rotation of the main shaft, so that the grinding processing requirement of the multi-station round bar die is met, the times and time for replacing the grinding head are reduced, the grinding head rotates at a high speed by adopting a direct driving system, and has higher positioning accuracy.
Description
Technical Field
The invention relates to the technical field of die machining, in particular to an improved process for an extrusion die fabrication hole.
Background
The extrusion die is a die for extruding metal. One of more dies is used in the hot extrusion production of a round bar die and a round tube die, the size precision and the surface roughness of a working tape of the die can directly influence the size precision and the surface roughness of the outer diameter of a round bar material and a round tube material, the size precision of a core print and the surface roughness of a smooth surface, and the size precision and the surface roughness of the inner diameter of the tube material can be directly influenced. At present, in order to reduce the extrusion coefficient and the extrusion force and save the cost of die processing and product extrusion, a porous die needs to be processed.
However, since the working hole is an eccentric circular hole and the corresponding core is also eccentric, it is inconvenient to machine on a lathe, a boring machine and a grinding machine, so that the core and the outlet belt are usually machined by an electric spark and a wire cutting machine, and then the working hole and the core are manually polished by a fitter, which not only reduces the production efficiency, but also has poor roundness, directly affecting the quality of the section bar.
In the national publication No. CN102950442B, a process for processing an extrusion die, wherein a die blank processed with a die hole is subjected to heat treatment, the strength of the die blank is increased, the compression resistance and bending resistance of each die hole are enhanced, so that the die is not easy to crack, the service life of the die is longer, and the die hole is not easy to extrude and deform; the fine processing of the die blank is beneficial to the stable rotation of the die during the extrusion granulation; and furthermore, the method of placing the two die blanks on the granulator to extrude and grind the die holes is adopted, only the grinding material needs to be continuously put in, the grinding cost is lower, the two die blanks can act simultaneously, the grinding efficiency is high, the die holes after grinding are smooth, and the demoulding is easier.
In the existing technology for improving the technical hole of the extrusion die, the quality of the die needs to be improved, the processing time needs to be shortened, and the production cost needs to be reduced. Therefore, it is highly desirable to provide an improved process for manufacturing a hole of an extrusion die, which can reduce the problem of high loss rate of potential customers.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an improved process for an extrusion die fabrication hole, which solves the problems of low die quality, prolonged processing time and increased production cost.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
an improved process for an extrusion die fabrication hole, comprising the steps of:
s1: turning the blank into a die blank with a required shape and size;
s2: processing an outlet belt of each hole by high-precision numerical control milling;
s3: then after heat treatment and quenching, grinding a plane and finely turning an excircle;
s4: aligning according to the die hole by a milling machine, and finely machining the working tape by using a fine-tuning boring cutter;
s5: and finally, polishing on a milling machine, and finishing by using a special grinding head.
Preferably, the allowance of the height dimension of the working tape for machining each hole is 0.3 mm-0.4 mm, and the height dimension of the working tape is far smaller than the perimeter dimension, so that the characteristic of short stroke is realized.
Preferably, the multi-station round bar die is machined by directly milling the rough-turned die blank into the outlet belt by using numerical control.
Preferably, the fine machining of the die hole working band is carried out by machining the die hole before quenching according to heat treatment by a milling machine. After the round bar die is heated by heat treatment quenching, the round bar die is rapidly cooled in quenching media such as water, oil or other inorganic salt solutions, organic aqueous solutions and the like, and the round bar die becomes hard and brittle after quenching.
Preferably, the feeding amount of the fine adjustment boring cutter is 0.01mm. When the fine boring cutter is used for machining, 0.1-0.3 mm is reserved according to a bottom hole, the fine adjustment is carried out in advance in a small range, the fine adjustment is carried out according to a cutter result after the use of a measuring tool is detected, a fastening screw behind the boring cutter head is unscrewed when the fine boring cutter is adjusted, the fastening screw does not need to be loosened for better adjustment accuracy, the fastening screw is unscrewed for 1-2 circles under general conditions, a dial scale of the boring cutter head is shifted clockwise according to scales on a cutter body, the diameter of the boring cutter is increased by 0.01mm when one scale is screwed, the size is adjusted by taking care that a reverse gap is prevented between the fine boring cutter head and the dial scale, the fine boring cutter is turned back after one circle is screwed in the opposite direction, the required size is adjusted according to the diameter of a trial cutter, the hole has a tolerance, and the range is controlled to be in the middle part or the tolerance of the lower limit of the hole tolerance when the fine boring cutter is adjusted, so that the machining size of the fine boring cutter can be ensured at regular time.
Preferably, the high-precision numerical control mill controls the position precision of the die hole and the depth of the outlet belt. The numerical control equipment is used for machining precise and complex parts, so that the position precision of a die hole and the depth of an outlet belt can be controlled with high precision, the radius of a minimum tool used in finish machining is smaller than or equal to the radius of an inner contour fillet on the machined part, and when the minimum tool is used in corner machining, a fine-tuning boring cutter with the radius of a small Yujie corner fillet radius is selected and machined in a circular interpolation mode, so that the phenomenon of over-cutting and out-of-roundness caused by linear interpolation can be avoided, and the characteristic of out-of-roundness is realized.
Preferably, when the professional grinding head is used for machining, the grinding head is driven to rotate by the rotation of the main shaft of the machine tool, micro-cutting is generated, and the cutting force is a constant value. The grinding head is driven to rotate by the rotation of the main shaft, so that the grinding machining requirements of the multi-station round bar die are met, the times and time for replacing the grinding head are reduced, the grinding head rotates at a high speed by adopting a direct driving system, and has higher positioning accuracy.
(III) advantageous effects
Compared with the prior art, the invention provides an improved process for the process hole of the extrusion die, which has the following beneficial effects:
1. the improved process of the extrusion die process hole includes that 0.1-0.3 mm is reserved according to a bottom hole when a fine adjustment boring cutter is set to start to process, the fine adjustment boring cutter is debugged in a small range in advance, fine adjustment is carried out according to cutter results after detection of a measuring tool, a fastening screw behind a boring cutter head is unscrewed when the fine boring cutter is debugged, the fastening screw is not loosened for better adjustment accuracy, the fastening screw is generally unscrewed for 1-2 circles, a dial scale of the boring cutter head is shifted clockwise according to scales on a cutter body, the diameter of the boring cutter is increased by 0.01mm when the fine boring cutter is screwed, the fine boring cutter head and the dial scale are prevented from having a reverse gap when the size is adjusted, the fine boring cutter is screwed in a circle in the reverse direction and then adjusted to a required size according to the diameter of a trial cutter, the hole has a tolerance, and the range is controlled to be in the middle part or the lower limit of the hole tolerance when the fine boring cutter is adjusted, so that the machining size of the hole can be ensured when the fine boring cutter is unstable.
2. According to the improved process of the extrusion die process hole, numerical control equipment is used for machining precise complex parts, so that the position precision of a die hole and the depth of an outlet zone can be controlled with high precision, the radius of a used minimum cutter is smaller than or equal to the radius of an inner contour fillet on the machined part during finish machining, a fine-tuning boring cutter with the radius of a small Yujie corner fillet radius is selected and machined in a circular interpolation mode during corner machining, the phenomenon that the phenomenon is over-cut and cut is caused by linear interpolation can be avoided, and the characteristic that the bottom of non-roundness is realized.
3. The improved process of the extrusion die process hole is characterized in that a main shaft of a machine tool is used for driving a grinding head to rotate when a special grinding head is machined, micro-cutting is generated, and the cutting force is constant. The grinding head is driven to rotate by the rotation of the main shaft, so that the grinding machining requirements of the multi-station round bar die are met, the times and time for replacing the grinding head are reduced, the grinding head rotates at a high speed by adopting a direct driving system, and has higher positioning accuracy.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
An improved process for an extrusion die fabrication hole, comprising the steps of:
s1: turning the blank into a die blank with the required shape and size;
s2: processing an outlet belt of each hole by high-precision numerical control milling;
s3: then after heat treatment and quenching, grinding a plane and finely turning an excircle;
s4: aligning according to the die hole by a milling machine, and finely machining the working tape by using a fine-tuning boring cutter;
s5: and finally, polishing on a milling machine, and finishing by using a special grinding head.
The height dimension of the working tape for processing each hole is remained to be 0.3 mm-0.4 mm, and the height dimension of the working tape is far smaller than the perimeter dimension.
The multi-station round bar die is processed by directly milling a rough-turned die blank into an outlet belt by using numerical control.
And (3) finish machining of the die hole working tape, wherein the milling machine is used for machining the die hole before quenching according to heat treatment. After the round bar die is heated by heat treatment quenching, the round bar die is rapidly cooled in quenching media such as water, oil or other inorganic salt solutions, organic aqueous solutions and the like, and the round bar die becomes hard and brittle after quenching.
The feed amount of the fine adjustment boring cutter is 0.01mm. When the fine boring cutter is used for machining, 0.1-0.3 mm is reserved according to a bottom hole, the fine adjustment is carried out in advance in a small range, the fine adjustment is carried out according to a cutter result after the use of a measuring tool is detected, a fastening screw behind the boring cutter head is unscrewed when the fine boring cutter is adjusted, the fastening screw does not need to be loosened for better adjustment accuracy, the fastening screw is unscrewed for 1-2 circles under general conditions, a dial scale of the boring cutter head is shifted clockwise according to scales on a cutter body, the diameter of the boring cutter is increased by 0.01mm when one scale is screwed, the size is adjusted by taking care that a reverse gap is prevented between the fine boring cutter head and the dial scale, the fine boring cutter is turned back after one circle is screwed in the opposite direction, the required size is adjusted according to the diameter of a trial cutter, the hole has a tolerance, and the range is controlled to be in the middle part or the tolerance of the lower limit of the hole tolerance when the fine boring cutter is adjusted, so that the machining size of the fine boring cutter can be ensured at regular time.
And the high-precision numerical control milling machine controls the position precision of the die hole and the depth of the outlet belt. The numerical control equipment is used for machining precise and complex parts, the radius of a minimum cutter used in finish machining is smaller than or equal to the radius of an inner contour fillet on the machined part, and when the numerical control equipment is used for machining corners, a fine-tuning boring cutter with the radius of a small Yujie corner fillet radius is selected and machined in a circular interpolation mode, so that the phenomenon of over-cutting and cutting caused by linear interpolation can be avoided, the position precision of a die hole and the depth of an outlet belt can be controlled with high precision.
When a professional grinding head is machined, the grinding head is driven to rotate by the rotation of a main shaft of a machine tool to generate micro-cutting, and the cutting force is constant. The grinding head is driven to rotate by the rotation of the main shaft, so that the grinding machining requirements of the multi-station round bar die are met, the times and time for replacing the grinding head are reduced, the grinding head rotates at a high speed by adopting a direct driving system, and has higher positioning accuracy.
The processing technology is as follows:
turning the blank into a die blank with a required shape and size, and machining an outlet belt of each hole by a high-precision numerical control milling machine, wherein during finish machining, the radius of a minimum cutter is smaller than or equal to the radius of an inner contour fillet on a part to be machined, and during corner machining, a fine-tuning boring cutter with the radius of a small jade sister corner fillet radius is selected and machined in a circular interpolation mode, so that the phenomenon of over-cutting and cutting caused by linear interpolation can be avoided, and the position precision of the die hole and the depth of the outlet belt can be controlled in a high-precision manner.
Then after heat treatment and quenching, grinding a plane and finely turning an outer circle, heating a round rod die by utilizing heat treatment and quenching to a message, then rapidly cooling the round rod die in a water and oil quenching medium, wherein the round rod die after quenching can be hardened and become brittle, and in order to reduce the brittleness of the round rod die, the round rod die after quenching is subjected to heat preservation for a long time at a certain proper temperature higher than room temperature and lower than 650 ℃, and then is cooled to improve the hardness and strength of the round rod die, so that the nonoxidability and non-decarbonization of the round rod die are realized, the surface of a processed workpiece is kept smooth, and the performance of the workpiece is improved.
The method comprises the steps of aligning a milling machine according to a die hole, finely machining a working tape by using a fine-tuning boring cutter, reserving 0.1-0.3 mm according to a bottom hole when machining is started, debugging in a small range in advance, fine tuning according to a cutter result after detection by using a measuring tool, loosening a fastening screw behind a boring cutter head when the fine boring cutter is debugged, generally loosening the fastening screw for 1-2 circles without loosening the fastening screw, clockwise turning a dial of the boring cutter head according to scales on a cutter body, paying attention to that the diameter of the boring cutter is increased by 0.01mm when the boring cutter is marked by one scale, paying attention to prevent a reverse gap from being formed between the fine boring cutter head and the dial when the size is adjusted, turning the boring cutter back after turning the boring cutter for one circle in the opposite direction, adjusting the required size according to the diameter of the test cutter, paying attention to that the hole has a tolerance, and controlling the range to be in the middle part or the lower limit of the tolerance of the hole when the fine boring cutter is adjusted, so that the machining size of the hole can be ensured at regular instability.
And finally, polishing is carried out on a milling machine, and the main shaft is rotated to drive the grinding head to rotate, so that the grinding machining requirement of the multi-station round bar die is met, the times and time for replacing the grinding head are reduced, the grinding head is rotated at a high speed by adopting a direct driving system, and the high positioning accuracy is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An improved process for an extrusion die fabrication hole is used for a round bar die to use a die in hot extrusion production, and is characterized by comprising the following steps:
s1: turning the blank into a die blank with the required shape and size;
s2: processing an outlet belt of each hole by high-precision numerical control milling;
s3: then after heat treatment and quenching, grinding a plane and finely turning an excircle;
s4: aligning according to the die hole by a milling machine, and finely machining the working tape by using a fine-tuning boring cutter;
s5: and finally, polishing on a milling machine, and finishing by using a special grinding head.
2. The improved process for extrusion tooling holes of claim 1 wherein: the height dimension of the working tape for processing each hole is remained to be 0.3mm-0.4 mm, and the height dimension of the working tape is far smaller than the perimeter dimension.
3. The improved process of claim 1, wherein the extrusion die comprises: the multi-station round bar die is characterized in that a die blank after rough turning is directly milled and processed into an outlet belt by using numerical control.
4. The improved process for extrusion tooling holes of claim 1 wherein: and (3) finish machining of the die hole working tape, wherein the milling machine is used for machining the die hole before quenching according to heat treatment.
5. The improved process of claim 1, wherein the extrusion die comprises: the feeding amount of the fine adjustment boring cutter is 0.01mm.
6. The improved process of claim 1, wherein the extrusion die comprises: the high-precision numerical control mill controls the position precision of the die hole and the depth of the outlet belt.
7. The improved process for extrusion tooling holes of claim 1 wherein: when the professional grinding head is used for machining, the main shaft of the machine tool rotates to drive the grinding head to rotate, so that micro-cutting is generated, and the cutting force is constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211602612.9A CN115740999A (en) | 2022-12-14 | 2022-12-14 | Improved process for process hole of extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211602612.9A CN115740999A (en) | 2022-12-14 | 2022-12-14 | Improved process for process hole of extrusion die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115740999A true CN115740999A (en) | 2023-03-07 |
Family
ID=85345796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211602612.9A Pending CN115740999A (en) | 2022-12-14 | 2022-12-14 | Improved process for process hole of extrusion die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115740999A (en) |
-
2022
- 2022-12-14 CN CN202211602612.9A patent/CN115740999A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107030598A (en) | The trapezoidal thread part and its processing method of hard chrome plating | |
| CN110842047A (en) | Extrusion die machining method | |
| CN104924040B (en) | A kind of processing method of plate structure part | |
| CN106312152A (en) | Method for machining thin-walled components | |
| CN115740999A (en) | Improved process for process hole of extrusion die | |
| CN103286389A (en) | Device and method for machining high-speed turning multi-head large-lead deep-groove-type external threads | |
| CN110919474B (en) | Method for processing ball head columnar ball-loading gap outer ring of double-row angular contact ball bearing | |
| CN108941636B (en) | Turning tool and die lip turning method using same | |
| CN104128679B (en) | A kind of flank of tooth contour machining procedure opening helical structure | |
| CN115488360B (en) | Efficient turning method for annular mortise of high-temperature alloy disc | |
| CN106623984A (en) | Guide wheel base numerical control turning technology method | |
| CN112893880B (en) | Method for processing shallow groove on retaining ring | |
| CN115255838A (en) | Manufacturing process and method of threading and rolling thread rolling wheel | |
| CN113414453B (en) | Gear machining method and cutter | |
| CN214684440U (en) | Straight line slotting machining cutter | |
| CN111421299B (en) | Processing method of bead fixing ring | |
| JP5610124B2 (en) | Forming tool processing method | |
| CN106584296B (en) | Super hard abrasive forming grinding wheel basal body structure design method is electroplated in non-API ring screw gauges | |
| CN112719784A (en) | Manufacturing method of bearing sleeve of vibration motor of mobile phone | |
| CN205032744U (en) | Knife rest structure for processing watch clamping plate by numerical control lathe | |
| CN114986106B (en) | Processing method of tantalum sputtering target end face seal groove | |
| CN214920827U (en) | Cutter for processing eccentric nose mold | |
| CN110076529A (en) | A kind of weak rigid radial porous system precision valve pocket stable state processing method | |
| JP4819352B2 (en) | Manufacturing method of forging die, forging die and forged product | |
| CN217492721U (en) | Disposable positive and negative composite diamond boring cutter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |