CN114799760A - Method for manufacturing insert pin - Google Patents
Method for manufacturing insert pin Download PDFInfo
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- CN114799760A CN114799760A CN202210501930.XA CN202210501930A CN114799760A CN 114799760 A CN114799760 A CN 114799760A CN 202210501930 A CN202210501930 A CN 202210501930A CN 114799760 A CN114799760 A CN 114799760A
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- round bar
- bar structure
- insert pin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention discloses a method for manufacturing an insert pin, which comprises the following steps: s10: cutting a steel wire into a round bar structure with a preset size; s20: roughly processing the round bar structure; s30: carrying out heat treatment on the round rod structure to ensure that the surface hardness of the round rod structure is HRC40-55 and the internal hardness of the round rod structure is HRC 40-55; s40: grinding the round bar structure by using a white corundum grinding wheel with the mesh number less than 200#, and reserving grinding allowance with a single side less than 0.05 mm; s50: grinding the round bar structure by using a white steel jade grinding wheel with the mesh number not less than 200 #; s60: observing the round bar structure by using a magnifying lens which is not less than 40 times, wherein if the surface of the round bar structure is smooth and has no concave-convex mark, the round bar structure is qualified, otherwise, the round bar structure is unqualified; s70: the qualified round bar structure is annealed, so that the service life of the insert pin is prolonged, and the production efficiency is improved.
Description
Technical Field
The invention relates to the field of dies, in particular to a method for manufacturing an insert pin.
Background
As is known, in the existing aluminum alloy die casting production, an insert pin is required to form a hole or exhaust a gas, but the insert pin belongs to the most common vulnerable part, and the insert pin manufactured by the existing manufacturing method may deform or break after about 400 times of production using an aluminum alloy die casting mold, and thus needs to be repaired or replaced, which seriously affects the production efficiency and cost, and the insert pin of the existing manufacturing method generally only can be formed with a small aperture and has a shallow depth, and cannot meet the design requirements.
Therefore, there is a need for a method of manufacturing an insert that improves the useful life of the insert to overcome the above-mentioned disadvantages.
Disclosure of Invention
The invention aims to provide a method for manufacturing an insert pin, which can prolong the service life of the insert pin.
In order to achieve the above object, the insert pin manufacturing method of the present invention includes the steps of:
s10: cutting a steel wire into a round bar structure with a preset size;
s20: roughly processing the round bar structure;
s30: carrying out heat treatment on the round rod structure to ensure that the surface hardness of the round rod structure is HRC40-55 and the internal hardness of the round rod structure is HRC 40-55;
s40: grinding the round bar structure by using a white corundum grinding wheel with the mesh number less than 200#, and reserving grinding allowance with a single side less than 0.05 mm;
s50: grinding the round bar structure by using a white steel jade grinding wheel with the mesh number not less than 200 #;
s60: observing the round bar structure by using a magnifying lens which is not less than 40 times, wherein if the surface of the round bar structure is smooth and has no concave-convex mark, the round bar structure is qualified, otherwise, the round bar structure is unqualified;
s70: and annealing the qualified round bar structure.
Preferably, in S10, the steel material is 8407 special steel.
Preferably, in S20, the roughing is a combination of one or more of rough turning, rough planing, rough milling, drilling and rasping.
Preferably, at S20, the surface hardness of the round bar structure differs from the internal hardness of the round bar structure by HRC 5.
Preferably, in S20, the surface hardness of the round bar structure is HRC 47-48.
Preferably, in S20, the internal hardness of the round bar structure is HRC 47-48.
Preferably, in S40, the white corundum grinding wheel has a mesh number greater than 80# and less than 200 #; in S50, the white corundum grinding wheel has a mesh number of 200# or more and 500# or less.
Preferably, in S40, the mesh number of the white corundum grinding wheel is 120 #; in S50, the white corundum grinding wheel has a mesh number of 240 #.
Preferably, in S40, the reserved one-side grinding margin is 0.01 mm.
Preferably, in S60, the magnification of the magnifier is 50 times.
Compared with the prior art, the insert pin manufacturing method comprises the following steps: s10: cutting a steel wire into a round bar structure with a preset size; s20: roughly processing the round bar structure; s30: carrying out heat treatment on the round rod structure to ensure that the surface hardness of the round rod structure is HRC40-55 and the internal hardness of the round rod structure is HRC 40-55; s40: grinding the round bar structure by using a white corundum grinding wheel with the mesh number less than 200#, and reserving grinding allowance with a single side less than 0.05 mm; s50: grinding the round bar structure by using a white steel jade grinding wheel with the mesh number not less than 200 #; s60: observing the round bar structure by using a magnifying lens which is not less than 40 times, wherein if the surface of the round bar structure is smooth and has no concave-convex mark, the round bar structure is qualified, otherwise, the round bar structure is unqualified; s70: annealing treatment is carried out on the qualified round bar structure, the service life of the modified insert pin is prolonged from 400 die times to 2000 die times, and the depth of the modified insert pin with the phi 2mm forming aperture is increased from 3-4mm to 6-8mm, so that the efficiency and the quality of aluminum alloy die-casting production are improved.
Drawings
FIG. 1 is a flow chart of the insert pin manufacturing method of the present invention.
Fig. 2 is a perspective view of an insert manufactured by the insert manufacturing method shown in fig. 1.
Detailed Description
Referring to fig. 1 and 2, an object of the present invention is to provide a method for manufacturing an insert pin capable of increasing the service life of the insert pin.
In order to achieve the above object, the insert pin manufacturing method of the present invention includes the steps of:
s10: the steel material is processed into a round bar structure with a preset size by wire cutting, preferably, the steel material is 8407 special steel to improve the mechanical fatigue resistance and the thermal stress fatigue resistance of the insert pin 1, improve the hardness of the insert pin 1 to slow down the occurrence of thermal cracking and prolong the service life of the insert pin 1, but not limited thereto.
S20: roughly machining the round bar structure, specifically, roughly machining the round bar structure by one or a combination of rough turning, rough planing, rough milling, drilling and rasping to ensure that the rough machining of the round bar structure meets a preset requirement, but not limited to the preset requirement;
s30: performing heat treatment on the round rod structure to ensure that the surface hardness of the round rod structure is HRC40-55 and the internal hardness of the round rod structure is HRC40-55 so as to ensure the surface hardness and the internal hardness of the round rod structure and further slow down the occurrence of heat cracks of the insert needle 1, preferably, the difference between the surface hardness of the round rod structure and the internal hardness of the round rod structure is HRC 5 so as to further ensure that the difference between the surface hardness and the internal hardness of the round rod structure is smaller, further slow down the occurrence of heat cracks of the insert needle 1 and prolong the service life of the insert needle 1, but not limited thereto;
s40: grinding the round bar structure by using a white corundum grinding wheel with the mesh number smaller than 200#, reserving a grinding allowance with a single side smaller than 0.05mm for subsequent precise machining, preferably, the mesh number of the white corundum grinding wheel is larger than 80# and smaller than 200#, and the reserved single side grinding allowance is 0.01mm, so as to further ensure subsequent precise machining, but not limited by the above;
s50: grinding the round bar structure by using the white corundum grinding wheel with the mesh number not less than 200# so as to further process the surface of the round bar structure and avoid generating concave-convex marks, preferably, the mesh number of the white corundum grinding wheel is more than or equal to 200# and less than or equal to 500# so as to ensure the grinding precision, so that the insert needle 1 is suitable for more precise aluminum alloy die casting, the occurrence of thermal cracking is further slowed down, and the service life of the insert needle 1 is prolonged;
s60: observing the round bar structure by using a magnifying lens which is not less than 40 times, wherein if the surface of the round bar structure is smooth and has no concave-convex mark, the round bar structure is qualified, otherwise, the round bar structure is unqualified, so that the machining error of the round bar structure is ensured to be in a reasonable range, and the service life of the insert pin 1 is ensured, specifically, the magnification of the magnifying lens is 50 times, so that the machining error of the round bar structure is further ensured to be in a reasonable range;
s70: annealing treatment is carried out on the qualified round bar structure so as to reduce the residual stress of the round bar structure, stabilize the size and reduce the deformation and crack tendency, thereby further prolonging the service life of the insert pin 1: more specifically, the following is provided
In S30, the surface hardness of the round bar structure is HRC47-48 to further secure the surface hardness of the round bar structure, thereby extending the life of the insert 1.
At S30, the internal hardness of the round bar structure is HRC47-48 to further secure the internal hardness of the round bar structure, thereby extending the life of the insert 1.
In S40, the mesh number of the white corundum grinding wheel is 120#, and in S50, the mesh number of the white corundum grinding wheel is 240 #. The surface precision of the cylindrical structure is ensured, so that the insert pin 1 is suitable for more precise aluminum alloy die casting, the occurrence of thermal cracking is further slowed down, and the service life of the insert pin 1 is prolonged;
compared with the prior art, the insert pin manufacturing method comprises the following steps: s10: cutting a steel wire into a round bar structure with a preset size; s20: roughly processing the round bar structure; s30: carrying out heat treatment on the round rod structure to ensure that the surface hardness of the round rod structure is HRC40-55 and the internal hardness of the round rod structure is HRC 40-55; s40: grinding the round bar structure by using a white corundum grinding wheel with the mesh number less than 200#, and reserving grinding allowance with a single side less than 0.05 mm; s50: grinding the round bar structure by using a white steel jade grinding wheel with the mesh number not less than 200 #; s60: observing the round bar structure by using a magnifying lens which is not less than 40 times, wherein if the surface of the round bar structure is smooth and has no concave-convex mark, the round bar structure is qualified, otherwise, the round bar structure is unqualified; s70: the qualified round bar structure is annealed, so that the service life of the insert pin 1 is prolonged, and the production efficiency is improved.
The above disclosure is only a preferred embodiment of the present invention, which is convenient for those skilled in the art to understand and implement, and certainly not to limit the scope of the present invention, therefore, the present invention is not limited by the claims and their equivalents.
Claims (10)
1. A method for manufacturing an insert pin, comprising the steps of:
s10: cutting a steel wire into a round bar structure with a preset size;
s20: roughly processing the round bar structure;
s30: carrying out heat treatment on the round rod structure to ensure that the surface hardness of the round rod structure is HRC40-55 and the internal hardness of the round rod structure is HRC 40-55;
s40: grinding the round bar structure by using a white corundum grinding wheel with the mesh number less than 200#, and reserving grinding allowance with a single side less than 0.05 mm;
s50: grinding the round bar structure by using a white steel jade grinding wheel with the mesh number not less than 200 #;
s60: observing the round bar structure by using a magnifying lens which is not less than 40 times, wherein if the surface of the round bar structure is smooth and has no concave-convex mark, the round bar structure is qualified, otherwise, the round bar structure is unqualified;
s70: and annealing the qualified round bar structure.
2. The insert pin manufacturing method according to claim 1, wherein in S10, the steel material is 8407 special steel.
3. The insert manufacturing method according to claim 1, wherein in S20, the roughing is one or a combination of rough turning, rough planing, rough milling, drilling, and rasping.
4. The insert pin manufacturing method according to claim 1, wherein at S20, the surface hardness of the round bar structure differs from the internal hardness of the round bar structure by HRC 5.
5. The insert pin manufacturing method according to claim 1, wherein in S20, the surface hardness of the round bar structure is HRC 47-48.
6. The insert pin manufacturing method of claim 1, wherein in S20, the internal hardness of the round bar structure is HRC 47-48.
7. The insert manufacturing method according to claim 1, wherein in S40, the white corundum abrasive grain number is greater than 80# and less than 200 #; in S50, the white corundum grinding wheel has a mesh number of 200# or more and 500# or less.
8. The insert manufacturing method according to claim 1, wherein in S40, the mesh number of the white corundum grinding wheel is 120 #; in S50, the white corundum grinding wheel has a mesh number of 240 #.
9. The insert pin manufacturing method of claim 1, wherein a single-side grinding margin of 0.01mm is reserved in S40.
10. The insert pin manufacturing method according to claim 1, wherein in S60, the magnification of the magnifying glass is 50 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210501930.XA CN114799760A (en) | 2022-05-09 | 2022-05-09 | Method for manufacturing insert pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210501930.XA CN114799760A (en) | 2022-05-09 | 2022-05-09 | Method for manufacturing insert pin |
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| Publication Number | Publication Date |
|---|---|
| CN114799760A true CN114799760A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210501930.XA Pending CN114799760A (en) | 2022-05-09 | 2022-05-09 | Method for manufacturing insert pin |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4760668A (en) * | 1986-07-02 | 1988-08-02 | Alfred Schlaefli | Surface grinding machine and method |
| CN105922013A (en) * | 2016-04-22 | 2016-09-07 | 太仓市东晖机械厂 | Cutting-grinding integrated machine |
| CN206254041U (en) * | 2016-11-29 | 2017-06-16 | 深圳天珑无线科技有限公司 | Pin processing unit (plant) |
| CN107350903A (en) * | 2017-09-12 | 2017-11-17 | 苏州沃思诺自动化科技有限公司 | A kind of grinding machine processing technology for improving mold surface finish |
| CN109483330A (en) * | 2018-10-26 | 2019-03-19 | 无锡市普高精密机械科技有限公司 | A kind of preparation method and its detection device of red needle |
| CN110814668A (en) * | 2019-12-04 | 2020-02-21 | 广州市型腔模具制造有限公司 | Mold insert pin machining process |
-
2022
- 2022-05-09 CN CN202210501930.XA patent/CN114799760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4760668A (en) * | 1986-07-02 | 1988-08-02 | Alfred Schlaefli | Surface grinding machine and method |
| CN105922013A (en) * | 2016-04-22 | 2016-09-07 | 太仓市东晖机械厂 | Cutting-grinding integrated machine |
| CN206254041U (en) * | 2016-11-29 | 2017-06-16 | 深圳天珑无线科技有限公司 | Pin processing unit (plant) |
| CN107350903A (en) * | 2017-09-12 | 2017-11-17 | 苏州沃思诺自动化科技有限公司 | A kind of grinding machine processing technology for improving mold surface finish |
| CN109483330A (en) * | 2018-10-26 | 2019-03-19 | 无锡市普高精密机械科技有限公司 | A kind of preparation method and its detection device of red needle |
| CN110814668A (en) * | 2019-12-04 | 2020-02-21 | 广州市型腔模具制造有限公司 | Mold insert pin machining process |
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