CN111151983A - Screw plug cold heading machining method of fire valve - Google Patents
Screw plug cold heading machining method of fire valve Download PDFInfo
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- CN111151983A CN111151983A CN202010112829.6A CN202010112829A CN111151983A CN 111151983 A CN111151983 A CN 111151983A CN 202010112829 A CN202010112829 A CN 202010112829A CN 111151983 A CN111151983 A CN 111151983A
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- cold heading
- treatment
- processing method
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- heading processing
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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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- Mechanical Engineering (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention relates to a cold heading processing method of a screw plug of a fire valve, which is characterized by comprising the following steps of 1), blanking, cutting a metal material according to requirements; 2) cold heading, namely putting a metal material into a first die to punch cylindrical steps at two ends; 3) finish machining, namely turning out the plane of the metal material subjected to cold heading and the threads on the cylindrical steps at two ends by a numerical control lathe; 4) positioning, namely placing the metal material subjected to finish machining into a second die to position the excircle of the step and simultaneously drilling four through holes; 5) and performing surface treatment, namely performing closed rack plating on the surface of the positioned product to obtain a finished product plug screw, wherein the invention has the beneficial effects that: the plane and the thread of the screw plug are directly turned by numerical control, the verticality of the thread is excellent, the concentricity of the four through holes is excellent, the surface of a product is subjected to wall-hanging and plating treatment, and the thread is more durable and has good corrosion resistance.
Description
Technical Field
The invention relates to the field of fire valve screw plugs, in particular to a cold heading processing method for a screw plug of a fire valve.
Background
A flange is installed at a water outlet of a water outlet pipeline of a fire valve or a fire pump, a plug screw is installed on the flange and used for air sealing, when the plug screw on the flange of the water pump outlet is generally taken down to deflate, water overflows until no air bubbles exist, the pump is screwed down to indicate that the pump is full of water, and a fire facility needs to frequently check whether the pump works normally, so that the plug screw needs to be frequently taken down and put back, the thread on the plug screw needs to be durable, and the existing plug screw is not enough due to the existence of a machining process and often causes water leakage after the plug screw is used for a period of time.
Disclosure of Invention
The technical problem to be solved by the present invention is to solve the above-mentioned deficiencies of the prior art,
provides a cold heading processing method for a screw plug of a fire valve.
In order to achieve the purpose, the invention provides the following technical scheme: a cold heading processing method for a screw plug of a fire valve is characterized by comprising the following steps,
1) blanking, cutting off the metal material according to requirements;
2) cold heading, namely putting a metal material into a first die to punch cylindrical steps at two ends;
3) finish machining, namely turning out the plane of the metal material subjected to cold heading and the threads on the cylindrical steps at two ends by a numerical control lathe;
4) positioning, namely placing the metal material subjected to finish machining into a second die to position the excircle of the step and simultaneously drilling four through holes;
5) and performing surface treatment, namely performing closed rack plating on the surface of the positioned product to obtain a finished product plug screw.
The cold heading processing method for the plug screw of the fire valve can be further set as follows: the rack plating process of the surface treatment in the step 5 comprises the steps of deoxidation treatment, polishing treatment, primary water washing treatment, activation treatment, electroplating treatment, secondary water washing treatment, passivation treatment and tertiary water washing treatment.
The cold heading processing method for the plug screw of the fire valve can be further set as follows: the treatment solution adopted in the step of the deoxidation treatment comprises the following treatment solutions in parts by volume: 5-10 parts of sulfuric acid, 1-20 parts of hydrochloric acid and the balance of water, wherein the treatment time in the deoxidation step is 20-30 s.
The cold heading processing method for the plug screw of the fire valve can be further set as follows: the electroplating time of the electroplating treatment is 28min, and the current is 75-110A.
The cold heading processing method for the plug screw of the fire valve can be further set as follows: and the polishing treatment comprises the steps of preparing polishing solution, introducing the polishing solution into an electrolytic bath, taking pure titanium as a cathode, taking the product subjected to finish machining in the step 4 as an anode, and putting the cathode and the anode into the polishing solution.
The cold heading processing method for the plug screw of the fire valve can be further set as follows: the specific process for preparing the polishing solution is that perchloric acid with volume fraction of 6-8% and glacial acetic acid with volume fraction of 84-94% are selected, and the mass ratio of perchloric acid to glacial acetic acid is 4: 14-16, and obtaining the polishing solution.
The cold heading processing method for the plug screw of the fire valve can be further set as follows: the polishing time is 50-70 s.
The invention has the beneficial effects that: the plane and the thread of the screw plug are directly turned by numerical control, the verticality of the thread is excellent, the concentricity of the four through holes is excellent, the surface of a product is subjected to wall-hanging and plating treatment, and the thread is more durable and has good corrosion resistance.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a block flow diagram of the process of the present invention.
Detailed Description
Referring to FIG. 1: a cold heading processing method for a screw plug of a fire valve is characterized by comprising the following steps,
1) blanking, cutting off the metal material according to requirements;
2) cold heading, namely putting a metal material into a first die to punch cylindrical steps at two ends;
3) finish machining, namely turning out the plane of the metal material subjected to cold heading and the threads on the cylindrical steps at two ends by a numerical control lathe;
4) positioning, namely placing the metal material subjected to finish machining into a second die to position the excircle of the step and simultaneously drilling four through holes;
5) the surface treatment comprises the steps of surface sealing rack plating of the positioned product surface to obtain a finished product screw plug, wherein the rack plating process of the surface treatment in the step 5 comprises the steps of deoxidation treatment, polishing treatment, first washing treatment, activation treatment, electroplating treatment, second washing treatment, passivation treatment and third washing treatment, and treatment liquid adopted in the deoxidation treatment step comprises the following treatment liquid in parts by volume: 5-10 parts of sulfuric acid, 1-20 parts of hydrochloric acid and the balance of water, wherein the treatment time of the deoxidation step is 20-30 s, the electroplating time of the electroplating treatment is 28min, the current is 75-110A, the polishing treatment comprises the steps of preparing polishing solution, introducing the polishing solution into an electrolytic bath, taking pure titanium as a cathode, taking a product subjected to finish machining in the step 4 as an anode, and putting the cathode and the anode into the polishing solution, wherein the specific process for preparing the polishing solution comprises the steps of selecting 6-8% of perchloric acid and 84-94% of glacial acetic acid in volume fraction, and mixing the components in percentage by mass as follows: 14-16, and obtaining the polishing solution, wherein the polishing time is 50-70 s.
Claims (7)
1. A cold heading processing method for a screw plug of a fire valve is characterized by comprising the following steps,
1) blanking, cutting off the metal material according to requirements;
2) cold heading, namely putting a metal material into a first die to punch cylindrical steps at two ends;
3) finish machining, namely turning out the plane of the metal material subjected to cold heading and the threads on the cylindrical steps at two ends by a numerical control lathe;
4) positioning, namely placing the metal material subjected to finish machining into a second die to position the excircle of the step and simultaneously drilling four through holes;
5) and performing surface treatment, namely performing closed rack plating on the surface of the positioned product to obtain a finished product plug screw.
2. The cold heading processing method for the screw plug of the fire valve as claimed in claim 1, wherein the cold heading processing method comprises the following steps: the rack plating process of the surface treatment in the step 5 comprises the steps of deoxidation treatment, polishing treatment, primary water washing treatment, activation treatment, electroplating treatment, secondary water washing treatment, passivation treatment and tertiary water washing treatment.
3. The cold heading processing method for the plug screw of the fire valve as claimed in claim 2, wherein the cold heading processing method comprises the following steps: the treatment solution adopted in the step of the deoxidation treatment comprises the following treatment solutions in parts by volume: 5-10 parts of sulfuric acid, 1-20 parts of hydrochloric acid and the balance of water, wherein the treatment time in the deoxidation step is 20-30 s.
4. The cold heading processing method for the plug screw of the fire valve as claimed in claim 2, wherein the cold heading processing method comprises the following steps: the electroplating time of the electroplating treatment is 28min, and the current is 75-110A.
5. The cold heading processing method for the plug screw of the fire valve as claimed in claim 2, wherein the cold heading processing method comprises the following steps: and the polishing treatment comprises the steps of preparing polishing solution, introducing the polishing solution into an electrolytic bath, taking pure titanium as a cathode, taking the product subjected to finish machining in the step 4 as an anode, and putting the cathode and the anode into the polishing solution.
6. The cold heading processing method for the screw plug of the fire valve as claimed in claim 5, wherein the cold heading processing method comprises the following steps: the specific process for preparing the polishing solution is that perchloric acid with volume fraction of 6-8% and glacial acetic acid with volume fraction of 84-94% are selected, and the mass ratio of perchloric acid to glacial acetic acid is 4: 14-16, and obtaining the polishing solution.
7. The cold heading processing method for the plug screw of the fire valve as claimed in claim 2 or 6, wherein the cold heading processing method comprises the following steps: the polishing time is 50-70 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112829.6A CN111151983A (en) | 2020-02-24 | 2020-02-24 | Screw plug cold heading machining method of fire valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010112829.6A CN111151983A (en) | 2020-02-24 | 2020-02-24 | Screw plug cold heading machining method of fire valve |
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| Publication Number | Publication Date |
|---|---|
| CN111151983A true CN111151983A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010112829.6A Pending CN111151983A (en) | 2020-02-24 | 2020-02-24 | Screw plug cold heading machining method of fire valve |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1008472A1 (en) * | 1998-12-10 | 2000-06-14 | Ford-Werke Aktiengesellschaft | Method for producing a supplementary glow plug heating element for motor vehicles |
| CN102744357A (en) * | 2011-04-18 | 2012-10-24 | 温永林 | Handle fastening screw processing technology |
| CN103088267A (en) * | 2012-12-04 | 2013-05-08 | 安徽六方重联机械股份有限公司 | Preparation method of lengthened bolt |
| CN109898114A (en) * | 2019-03-25 | 2019-06-18 | 扬州虹扬科技发展有限公司 | A kind of production technology of hang plating production line |
-
2020
- 2020-02-24 CN CN202010112829.6A patent/CN111151983A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1008472A1 (en) * | 1998-12-10 | 2000-06-14 | Ford-Werke Aktiengesellschaft | Method for producing a supplementary glow plug heating element for motor vehicles |
| CN102744357A (en) * | 2011-04-18 | 2012-10-24 | 温永林 | Handle fastening screw processing technology |
| CN103088267A (en) * | 2012-12-04 | 2013-05-08 | 安徽六方重联机械股份有限公司 | Preparation method of lengthened bolt |
| CN109898114A (en) * | 2019-03-25 | 2019-06-18 | 扬州虹扬科技发展有限公司 | A kind of production technology of hang plating production line |
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Application publication date: 20200515 |