CN114178783A - Cold heading process method of high-pressure oil pump - Google Patents
Cold heading process method of high-pressure oil pump Download PDFInfo
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- CN114178783A CN114178783A CN202111333002.9A CN202111333002A CN114178783A CN 114178783 A CN114178783 A CN 114178783A CN 202111333002 A CN202111333002 A CN 202111333002A CN 114178783 A CN114178783 A CN 114178783A
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- cold heading
- oil pump
- pressure oil
- process method
- pump according
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a cold heading process method of a high-pressure oil pump, which belongs to the technical field of production and processing of the high-pressure oil pump, and comprises the following steps of cutting, arranging materials, forming in a first step, forming in a second step, forming in a last step, punching and polishing.
Description
Technical Field
The invention relates to the technical field of production and processing of high-pressure oil pumps, in particular to a cold heading process method of a high-pressure oil pump.
Background
In the production of the high-pressure oil pump shell of the automobile engine, the processing requirements of materials need to be met, and the material selection standard of the electromagnetic force needs to be met after the product is manufactured.
The existing product design has the defects of time and processing equipment in processing, wastes processing materials in the processing process, is not environment-friendly, and leads the product specification to not reach the specification of product selection because the materials do not meet the electromagnetic force requirement after processing.
Based on the technical scheme, the invention designs a cold heading process method of the high-pressure oil pump so as to solve the problems.
Disclosure of Invention
The invention aims to provide a cold heading process method of a high-pressure oil pump, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: cold heading process for high-pressure oil pump
The method comprises the following steps:
s1, cutting: cutting the material, and preparing the material for processing the oil pump shell;
s2, monolith: leveling the cut material, cleaning the material before processing, and removing
Removing oxide layers and impurities, and carrying out annealing, shot blasting and thermal coating treatment;
s3, first-step forming: performing cold heading on the leveled material on a cold heading machine to form an excircle concave position of the outer shell;
s4, second-step forming: forming an inner hole and an end face of the outer shell by cold heading on a cold heading machine;
s5, final forming: forming a semicircular groove flat position of the outer shell by cold heading on a cold heading machine;
s6, punching: punching an anti-rotation pin hole and an oil hole on a punch;
s7, polishing: and (5) vibrating and polishing on a vibrating machine.
A cold heading process method of a high-pressure oil pump is characterized in that in the further scheme, reasonable excess material planning is carried out on the material in the step S1, and cut pieces are cut by a cutting machine.
In a further scheme, the material obtained in the step S2 is subjected to alkali washing to remove oil after being polished by a polishing machine to remove impurities, and residual alkali liquor is cleaned.
A cold heading process method of a high-pressure oil pump is characterized in that in the further scheme, the rough blank of the cutting piece material in the step S2 is put into a high-temperature furnace, the temperature of the furnace is 1050-1150 ℃, the temperature is kept for 1-1.5 h, then the rough blank of the cutting piece material is put into water for rapid cooling, and heat treatment is carried out.
In a further scheme, the rough blank of the cutting piece material in the step S2 is subjected to activation shot blasting treatment, pills with the diameter of 0.3-0.5 mm are used, the temperature is 180-200 ℃, and the activation time is 30-40 min.
A cold heading process method of a high-pressure oil pump is characterized in that in the further scheme, the rough blank of the cutting piece material in the step S2 is heated to 200-240 ℃ and soaked for 5-8S by using a water-based polymer lubricant.
In a further scheme, in the steps S3-S6, a clamp is adopted to carry out fixed clamping operation on a machining material.
In a further scheme, the material subjected to vibration polishing in the step S7 is placed into nitric acid solution with the concentration of 3-5% for cleaning for 5-10S, then is cleaned in a water tank, and is dried and baked after being cleaned with water.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, reasonable excess material planning is carried out on the blank material, and impurity removal, annealing, shot blasting and hot coating treatment of the material are carried out before processing, so that the adhesive force of the lubricant on the surface of the part is obviously improved, the problem that a lubricating film is easy to break in the cold extrusion and extrusion process is solved, the friction-reducing and lubricating effects are achieved, the material is subjected to multiple cold heading forming, the forming standard is met, the formed high-pressure oil pump shell improves the electromagnetic force, and the material is saved and the environment is protected in the processing and forming process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram illustrating electromagnetic force data of a standard finished product;
FIG. 2 is a schematic diagram of electromagnetic force data of a product formed by cold heading according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a cold heading process method of a high-pressure oil pump comprises the following steps:
s1, cutting: cutting the material, preparing the material for processing the oil pump shell, and designing the material cutting
Planning reasonable surplus materials of the materials, and cutting the cut pieces by using a cutting machine;
s2, monolith: leveling the cut materials, cleaning the materials before processing, polishing the materials by a polisher to remove impurities, then washing with alkali to remove oil, and cleaning residual alkali liquor; removing an oxide layer and impurities, and performing shot blasting and thermal coating treatment;
the method comprises the following specific steps:
annealing treatment: putting the rough blank of the cutting piece material into a high-temperature furnace, keeping the temperature at 1050-1150 ℃ for 1-1.5 h, putting the rough blank of the cutting piece material into water for quick cooling, and carrying out heat treatment.
Shot blasting treatment: and (3) carrying out activation shot blasting treatment on the rough blank of the cut piece material, wherein pills with the diameter of 0.3-0.5 mm are used, the temperature is 180-200 ℃, and the activation time is 30-40 min.
Thermal coating treatment: and heating the rough cut piece material blank to 200-240 ℃, and soaking for 5-8 s by using a water-based polymer lubricant. (ii) a
S3, first-step forming: performing cold heading on the leveled material on a cold heading machine to form an excircle concave position of the outer shell;
s4, second-step forming: forming an inner hole and an end face of the outer shell by cold heading on a cold heading machine;
s5, final forming: forming a semicircular groove flat position of the outer shell by cold heading on a cold heading machine;
s6, punching: punching an anti-rotation pin hole and an oil hole on a punch;
in steps S3-S6, the machining material is fixedly clamped by a clamp.
S7, polishing: and (3) performing vibration polishing on a vibrating machine, putting the vibration polished material into nitric acid solution with the concentration of 3-5% for cleaning for 5-10S, then cleaning in a water tank, and drying and baking after water cleaning.
The standardized detection of electromagnetic force is carried out on a product after a cold heading process, and test data generally require that residual magnetic induction Br and magnetic induction coercive force Hc reach standards, (the intersection point of a hysteresis loop curve and an ordinate axis, namely the B value of the starting point of a demagnetization curve, is called residual magnetic induction, is called residual magnetism for short, and is represented by Br, the magnetic induction strength value in a magnet is the magnetic induction strength value after an external magnetic field is removed from a magnetic material, under the action of a negative magnetic field, the magnetic induction B in the magnet is weakened along with the increase of the demagnetization magnetic field, the demagnetizing magnetic field strength required for enabling the magnetic induction B in the magnet to reach zero is called magnetic induction coercive force, is called coercive force for short, and is represented by Hc or Hcb), as shown in figure 1, the standard Br is more than 0.6T (600mT), and the Hc is less than 160A/m, and the electromagnetic force data of the cold heading product in the invention are as follows: as shown in the attached figure 2, Br reaches 934mt (0.934T), Hc reaches 141A/m, Br is larger than a standard value, Hc is smaller than the standard value, and the electromagnetic force is good and has a wide market application prospect.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A cold heading process method of a high-pressure oil pump is characterized by comprising the following steps:
s1, cutting: cutting the material, and preparing the material for processing the oil pump shell;
s2, monolith: leveling the cut material, cleaning the material before processing, removing an oxide layer and impurities, and carrying out annealing, shot blasting and thermal coating treatment;
s3, first-step forming: performing cold heading on the leveled material on a cold heading machine to form an excircle concave position of the outer shell;
s4, second-step forming: forming an inner hole and an end face of the outer shell by cold heading on a cold heading machine;
s5, final forming: forming a semicircular groove flat position of the outer shell by cold heading on a cold heading machine;
s6, punching: punching an anti-rotation pin hole and an oil hole on a punch;
s7, polishing: and (5) vibrating and polishing on a vibrating machine.
2. The cold heading process method of the high-pressure oil pump according to claim 1, characterized in that: and (5) planning reasonable surplus materials of the materials in the step S1, and cutting the cut pieces by using a cutting machine.
3. The cold heading process method of the high-pressure oil pump according to claim 1, characterized in that: and D, polishing the material in the step S2 by using a polishing machine, removing impurities, then washing with alkali to remove oil, and cleaning the residual alkali liquor.
4. The cold heading process method of the high-pressure oil pump according to claim 1, characterized in that: and (5) putting the rough blank of the cut piece material obtained in the step (S2) into a high-temperature furnace, keeping the temperature at 1050-1150 ℃ for 1-1.5 h, putting the rough blank of the cut piece material into water for quick cooling, and carrying out heat treatment.
5. The cold heading process method of the high-pressure oil pump according to claim 1, characterized in that: and (4) performing activation shot blasting treatment on the rough blank of the cut piece material in the step S2, wherein pills with the diameter of 0.3-0.5 mm are used, the temperature is 180-200 ℃, and the activation time is 30-40 min.
6. The cold heading process method of the high-pressure oil pump according to claim 1, characterized in that: and (5) heating the rough blank of the cutting piece material in the step S2 to 200-240 ℃, and soaking for 5-8S by using a water-based polymer lubricant.
7. The cold heading process method of the high-pressure oil pump according to claim 1, characterized in that: in steps S3-S6, the machining material is fixedly clamped by a clamp.
8. The cold heading process method of the high-pressure oil pump according to claim 1, characterized in that: and (5) putting the material subjected to vibration polishing in the step S7 into nitric acid solution with the concentration of 3-5% for cleaning for 5-10S, then cleaning in a water tank, and drying and baking after water cleaning.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111333002.9A CN114178783A (en) | 2021-11-11 | 2021-11-11 | Cold heading process method of high-pressure oil pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111333002.9A CN114178783A (en) | 2021-11-11 | 2021-11-11 | Cold heading process method of high-pressure oil pump |
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| CN202111333002.9A Pending CN114178783A (en) | 2021-11-11 | 2021-11-11 | Cold heading process method of high-pressure oil pump |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030000603A1 (en) * | 2001-06-29 | 2003-01-02 | Rateick Richard G. | Selectively cold worked hydraulic motor/pump shoe |
| CN102059522A (en) * | 2010-12-17 | 2011-05-18 | 阮洪基 | One-time molding processing method of clutch shaft sleeve of impeller type full-automatic washing machine by cold upsetting and extruding |
| CN106661654A (en) * | 2014-07-03 | 2017-05-10 | 安赛乐米塔尔公司 | Method for manufacturing a high-strength steel sheet and sheet obtained by the method |
| CN110405421A (en) * | 2019-08-01 | 2019-11-05 | 上海工程技术大学 | A kind of crowded combined shaping method of the cold-heading of automobile-used non-ferrous metal housing part |
-
2021
- 2021-11-11 CN CN202111333002.9A patent/CN114178783A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030000603A1 (en) * | 2001-06-29 | 2003-01-02 | Rateick Richard G. | Selectively cold worked hydraulic motor/pump shoe |
| CN102059522A (en) * | 2010-12-17 | 2011-05-18 | 阮洪基 | One-time molding processing method of clutch shaft sleeve of impeller type full-automatic washing machine by cold upsetting and extruding |
| CN106661654A (en) * | 2014-07-03 | 2017-05-10 | 安赛乐米塔尔公司 | Method for manufacturing a high-strength steel sheet and sheet obtained by the method |
| CN110405421A (en) * | 2019-08-01 | 2019-11-05 | 上海工程技术大学 | A kind of crowded combined shaping method of the cold-heading of automobile-used non-ferrous metal housing part |
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Application publication date: 20220315 |