Machining process for production of titanium motor housing

Abstract

The present invention discloses a machining process for manufacturing a motor housing by using metal titanium, including the following machining steps: Calendar process is adopted, use stamping equipment to stamp the base of the titanium motor housing, apply lubricant on the surface of the die before stamping, and attach a lubricating film on the surface of metal titanium to be stamped; Calendar process is adopted, use stamping equipment to stamp the barrel-shaped titanium motor housing, apply lubricant on the surface of the die before stamping, and attach a lubricating film on the surface of metal titanium to be stamped, and after stamping, a barrel-shaped housing with a barrel depth to port diameter ratio of 1.21.8:1 is obtained; Spray and cleanse the housing base obtained from stamping in S1 and the barrel-shaped motor housing obtained from stamping in S2; Assemble the housing base and the barrel-shaped housing obtained in S3 to form the motor housing product; Inspect the assembled motor housing obtained in S4.

Claims

1. A machining process for manufacturing titanium motor housing product, wherein the said machining process includes the following steps: S1: using stamping equipment to stamp a base of the titanium motor housing product, wherein lubricant is applied on a surface of a die of the stamping equipment before stamping and a lubricating film is attached on a surface of metal titanium base material to be stamped; S2: using stamping equipment to stamp a barrel-shaped titanium motor housing, wherein lubricant is applied on a surface of a die of the stamping equipment for the barrel-shaped titanium motor housing before stamping and a lubricating film is attached on a surface of metal titanium base material to be stamped, wherein after stamping, the barrel-shaped housing with a barrel depth to port diameter ratio of 1.2 to 1.8:1 is obtained; S3: spraying and cleansing the housing base obtained from stamping in S1 and the barrel-shaped motor housing obtained from stamping in S2; S4: assembling the housing base and the barrel-shaped housing obtained in S3 to form the motor housing product; S5: inspecting the assembled motor housing product obtained in S4.

2. A machining process for manufacturing titanium motor housing product as described in claim 1, wherein the lubricant in the said S1 and S2 is cutting oil and calcium hydroxide (Ca(OH).sub.2) mixed into the cutting oil, and the lubricating film is oxalic acid.

3. A machining process for manufacturing titanium motor housing product as described in claim 2, wherein the lubricant applying method in the said S1 and S2 is using a spray gun or brush to apply the lubricant evenly on the surfaces of contact between a mould and a workpiece to be stamped, a lubricant coating thickness is 20 to 40 m, and the method for attaching a lubricating film on the surface of the titanium base material in the said S1 and S2 is that it is attached to the surface of titanium base material by spraying or brush applying, wherein a thickness of the lubricating film on the surface of titanium base material is 15-30 m.

4. A machining process for manufacturing the titanium motor housing product as described in claim 3, wherein the processing in the said S1 and S2 includes the following process steps: 1-1: filming comprising attaching the lubricating film on the surface of the titanium base material to be stamped; 1-2: blanking comprising cutting the titanium base material with the surface lubricating film into the titanium base material to be stamped according to precalculated dimensions; 1-3: cleansing the stamped titanium base material obtained from Step 1-2 to remove grease dirt from the surface, preventing it from contaminating a vacuum annealing furnace; 1-4: Subjecting the barrel-shaped motor housing to tempering heat treatment for stress relief; 1-5: Repeat Steps 1-2 to 1-4, until a contour of the housing base meets production requirements; 1-6: punching side holes and base holes in the barrel-shaped motor housing; 1-7: subjecting the interior and exterior of the housing base or barrel-shaped motor housing resulting from steps 1-6 to polishing; 1-8: trimming the polished housing base or barrel-shaped motor housing, making its outline dimensions, appearance and form meet production requirements.

5. A machining process for manufacturing the titanium motor housing product as described in claim 4, wherein the tempering heat treatment in the said Step 1-4 is specifically as follows: first, subjecting the housing base or barrel-shaped motor housing to vacuum annealing at a temperature of 690 C.; then holding the temperature for 2 hours; after temperature holding, naturally cooling the housing base or barrel-shaped motor housing to a normal temperature in the vacuum furnace.

6. A machining process for manufacturing the titanium motor housing product as described in claim 4, wherein the housing in the said S3 is specifically done according to the following steps: 3-1: assembling the housing base obtained in Step 1-7 with the barrel-shaped motor housing, 3-2: subjecting the assembly obtained from Step 3-1 to press riveting or welding.

7. A machining process for manufacturing the titanium motor housing product as described in claim 6, wherein the said S4 is intended for final inspection of the housing press riveted or welded according to Step 3-2.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic drawing showing the titanium motor housing machining process according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(2) The invention will now be described in more detail with reference to the accompanying drawings and embodiments. The following embodiments are merely intended for a better illustration of the present invention, rather than limiting the scope of the present invention.

(3) As shown in FIG. 1, the present invention relates to a machining process for manufacturing a motor housing 10 by using metal titanium, the said machining process includes the following machining steps:

(4) S1: Calendar process is adopted. Use stamping equipment 20 to stamp the base 12 of the titanium motor housing 10. Apply lubricant 22 on the surface of the die before stamping, and attach a lubricating film on the surface of metal titanium to be stamped;

(5) S2: Calendar process is adopted. Use stamping equipment 20 to stamp the barrel-shaped titanium motor housing 10. Apply lubricant 22 on the surface of the die before stamping, and attach a lubricating film on the surface of metal titanium to be stamped. After stamping, a barrel-shaped housing 10 with a barrel depth to port diameter ratio of 1.21.8:1 (preferably 1.5:1) is obtained;

(6) S3: Spray and cleanse the housing base 12 obtained from stamping in S1 and the barrel-shaped motor housing 10 obtained from stamping in S2;

(7) S4: Assemble the housing base 12 and the barrel-shaped housing 10 obtained in S3 to form the motor housing product;

(8) S5: Inspect the assembled motor housing 10 obtained in S4.

(9) To overcome the overheat accretion and pull crack among other defects that can easily occur to titanium during the calendaring process, a preferred embodiment of the present invention is characterized in that lubricant 22 in the said S1 and S2 is cutting oil and calcium hydroxide (Ca(OH)2) mixed into the cutting oil.

(10) To overcome the overhead accretion, pull crack and other defects that can easily occur to titanium during the calendaring process, a further preferred embodiment of the present invention is also characterized in that the lubricant applying method in the said S1 and S2 is using a spray gun or brush to apply the lubricant 22 evenly on the surfaces of contact between the mould and the workpiece to be stamped, the lubricant coating thickness is 2040 m, and the method for attaching a lubricating film 14 on the surface of titanium in the said S1 and S2 is that it is attached to the surface of titanium by spraying or brush applying, thickness of the lubricating film 14 on the surface of titanium is 1530 m.

(11) To overcome the overhead accretion, pull crack and other defects that can easily occur to titanium during the calendaring process, a further preferred embodiment of the present invention is also characterized in that the calendaring process in the said S1 and S2 includes the following process steps:

(12) 1-1: FilmingAttach a lubricating film 14 on the surface of the titanium base material 12 to be stamped;

(13) 1-2: BlankingCut the titanium base material 12 with a surface lubricating film 14 into the base material 12 to be stamped according to the precalculated dimensions;

(14) 1-3: CleansingCleanse the stamped base material 12 obtained from Step 1-2 to remove the grease dirt from the surface, preventing it from contaminating the vacuum annealing furnace;

(15) 1-4: Subject the ideally contoured housing base 12 or barrel-shaped motor housing 10 to tempering heat treatment for stress relief;

(16) 1-5: Repeat Steps 1-21-4, until the contour of the housing base 12 meets the production requirements;

(17) 1-6: Punch side holes and base holes in the barrel-shaped motor housing 10;

(18) 1-7: Subject the interior and exterior of the housing base 12 or barrel-shaped motor housing 10 resulted from Step 1-6 to polishing;

(19) 1-8: Trim the polished housing base 12 or barrel-shaped motor housing 10, making its outline dimensions, appearance and form meet the production requirements.

(20) To allow for easy relief of the internal stress during machining of titanium, a further preferred embodiment is also characterized in that the tempering heat treatment in the said Step 1-4 is specifically as follows: First, subject the ideally contoured housing base 12 or barrel-shaped motor housing 10 to vacuum annealing at a temperature of 690 C.; Then hold the temperature for 2 hours; After temperature holding, naturally cool the housing base 12 or barrel-shaped motor housing 10 to the normal temperature in the vacuum furnace.

(21) To allow for assembling the stamped titanium housing base 12 and the barrel-shaped motor housing 10 into motor product, a further preferred embodiment is also characterized in that the housing assembly in the said S3 is specifically done according to the following steps:

(22) 3-1: Assemble the qualified housing base 12 obtained in Step 1-7 with the barrel-shaped motor housing 10,

(23) 3-2: Subject the assembly obtained from Step 3-1 to press riveting or welding.

(24) To ensure the product quality meets the use requirements, a further preferred embodiment is also characterized in that the said S4 is intended for final inspection of the housing 10 press riveted or welded according to Step 3-2.

(25) Oxalic acid is a metabolite of living bodies, which is widely distributed in plants, animals and fungi, and plays different roles in different living bodies. Researchers have discovered that oxalic acid is rich in hundreds of varieties of plants, in particular, spinach, three-colored amaranth, sugarbeet, pursalne, taro, sweet potato and rhubarb and other plants have the highest content of oxalic acid. Since oxalic acid can reduce the bioavailabilities of mineral elements and can easily form calcium oxalate with calcium ions and cause kidney stone in human body, oxalic acid is usually deemed as an antagonist for mineral element absorption and utilization.

(26) TABLE-US-00001 Chinese name English name Oxalic acid; Ethanedioic acid Nickname Oxalic acid Molecular WT 90.04 Chemical formula H2C2O4 Density 1.653 g/mL Melting point 101~102 C. Safety Low toxicity Appearance Colorless flake shape nomoclinic Description Structure skeleton HOOCCOOH symbol Regulation info This product is not Acidity Weak acidity subject to regulation

(27) The above descriptions are only preferred embodiments of the present invention, and it should be pointed out that it is apparent to those skilled in the art that a number of improvements and variations can also be made without departing from the technical principles of the present invention, and those improvements and variations shall also be deemed within the scope of the present invention.