CN105290713B - A kind of manufacture craft of large-scale multiple edge body box part - Google Patents
A kind of manufacture craft of large-scale multiple edge body box part Download PDFInfo
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- CN105290713B CN105290713B CN201410230803.6A CN201410230803A CN105290713B CN 105290713 B CN105290713 B CN 105290713B CN 201410230803 A CN201410230803 A CN 201410230803A CN 105290713 B CN105290713 B CN 105290713B
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Abstract
A kind of manufacture craft of large-scale multiple edge body box part, is related to machinery manufacturing technology field, and the technique includes preparing casing（1）Rough casting, Welding block, line, it is rough turn, rough mill, heavy boring, ultrasonic examination and artificial aging, turning, half finish-milling, assembling, smart car, finish-milling, right boring and the processing step for removing technique block, the present invention is setting transition claw A17, transition claw B18 on angle corresponding to 1 both sides of casing, used when convenience is with being loaded；Correlated parts in the system of I holes and rack sleeve are combined processing, ensure that the depth of parallelism requirement of holes system during final use state reaches 0.02mm, axiality requirement reaches 0.02mm, and cylindricity requirement in hole reaches 0.02mm, reaches 0.02mm with the requirement of reference plane perpendicularity.
Description
【Technical field】
The invention belongs to machinery manufacturing technology field, more particularly, to a kind of manufacture craft of large-scale multiple edge body box part.
【Background technology】
It is known, require higher for the manufacturing technology of large-scale multiple edge body casing, due to complicated, more ribs of casing
Body casing is made up of multiple sides, and the angle requirement between each two side is accurate, and angle tolerance is ± 5 ˊ, side and center line
It is higher apart from coherence request, as shown in figure 1, multiple edge body box house includes two hole systems, I holes Xi HeII holes system, two
The hole system depth of parallelism is 0.02mm, and each hole axiality is required within 0.02mm, the manufacture of high-precision large-scale multiple edge body box part,
There are many difficult points in processing, how to be loaded, how to ensure during turning, how how measuring angle between each two side
Ensure how each side to the uniformity of the distance of center line, ensures depth of parallelism of two hole systems etc., turn into the technology of this area
The basic demand of personnel.
【The content of the invention】
In order to overcome the shortcomings of in background technology, the invention discloses a kind of making work of large-scale multiple edge body box part
Skill, solve the problems, such as large-scale multiple edge body casing turning to reach, be loaded, angular surveying and holes system when ensureing final use state
Axiality requires higher purpose.
In order to realize the purpose of foregoing invention, the present invention adopts the following technical scheme that：
A kind of manufacture craft of large-scale multiple edge body box part, the technique include preparing rough casting, the welder of casing
Skill block, line, it is rough turn, rough mill, heavy boring, ultrasonic examination and artificial aging, turning, half finish-milling, assembling, smart car, finish-milling, right boring
It is as follows with the processing step for removing technique block, concrete operation step：
1）Prepare the rough casting of casing：
Prepare the tank body blank casting that profile is hexagonal prism shape；
2）Welding block
In side, D both sides are respectively welded technique block F and technique block E, the both sides in the face between side F and side C
Technique block C and technique block D are respectively welded, the both sides in the face between side E and side C are respectively welded technique block A and work
Skill block B；
3）Line
After checking each size surplus of blank, the rice word center line of casing is drawn, is rule on each working position；
4）It is rough turn
I holes system end face A, I hole system end face B, I hole system end face C, I hole upper surface in rough turn I holes system, I holes system endoporus A, I
Hole system endoporus B and I holes system endoporus C, and leave 10mm allowance；
5）Rough mill, heavy boring
Side C, side D, side E and side F, heavy boring II holes Xi Zhongge holes and its end face are rough milled by line, stays 10mm to add
Spare time measures；
6）Ultrasonic examination and artificial aging
7）Turning
Turning I holes system, levelling upper surface, centering I holes system endoporus B, the center of 1 hole system is set to be overlapped with the lathe centre of gyration,
Centering franchise is 0.05mm, I holes system end face A, I hole system endoporus A, I holes system end face of smart car casing 1, I holes system endoporus B and I
Hole system end face C, is worked into drawing size；Remaining position of the I holes system of half smart car casing, stays 3mm allowance；In casing
Transition claw A, transition claw B are set corresponding to both sides on angle, used when convenience is with being loaded, the I holes system endoporus B in the system of I holes
Upper turning centering band, upper surface is leveled up when adjusting dress, by the centering band centering center of turning, franchise 0.05mm；
8）Half finish-milling
Levelling I holes upper surface, centering I holes system endoporus B, make the center of I holes system and the center weight of machine tool rotary working table
Close, centering franchise is 0.05mm；Milling side C, side D, side E, side F, miller skill block A, technique block B, technique block C, technique
Block D, technique block E, technique block F and other non-key positions, and stay 3mm allowance；Angle between per two sides is 60 ° ± 5
ˊ；
9）Assembling
Assemble correlated parts in the system of I holes, including rack sleeve；
10）Smart car
Using the I holes upper surface of casing 1 and I holes system's endoporus as centering benchmark, centering franchise 0.01mm/m, using transition claw
With transition claw assistant assembleing and fixing, I holes system end face A, I hole system end face B, I in the I holes system of turnery processing casing and rack sleeve
Hole upper surface, I holes system endoporus B；I holes system endoporus A, I holes system end face C and I hole system endoporus C, still with the I holes of casing when adjusting dress processing
Upper surface is centering benchmark, and centering franchise is 0.01mm/m.On the basis of the endoporus of the rack sleeve of machined completion in centering
The heart, centering franchise are 0.02mm；
11）Finish-milling
60 ° of ± 5 ˊ of angle between checking per two sides, check per side to the distance of center line, meet the requirements, correctly
After errorless, then on digital-control boring-milling machine finish-milling process, finish-milling side C, side D, side E, side F, technique block A, technique block B,
Technique block C, technique block D, technique block E, technique block F and other non-key positions, using the I holes upper surface of casing as levelling benchmark,
With the endoporus centering centre of gyration of rack sleeve, make the center of I holes system and the center superposition of machine tool rotary working table, centering franchise
For 0.02mm；
12）Right boring
Right boring II holes Xi Ge holes and its end face, the I holes upper surface alignment digital-control boring-milling machine cutter shaft of casing, with I holes system hole
The axle center of rack sleeve endoporus is looked for directly, levelling, ensures the depth of parallelism 0.02mm with II holes system；
13）Technique block A, technique block B, technique block C, technique block D, technique block E and technique block F are removed, that is, is completed large-scale more
The making of rib body box part.
The manufacture craft of described large-scale multiple edge body box part, in welding step, welding procedure block is spot welding.
The manufacture craft of described large-scale multiple edge body box part, in finish-milling and right boring step, digital-control boring-milling machine is height
The digital-control boring-milling machine of precision.
Due to being had the advantages that using above-mentioned technical proposal, the present invention：
The manufacture craft of large-scale multiple edge body box part of the present invention, by being respectively welded in side D both sides
Technique block F14 and technique block E13, the both sides in the face between side F and side C are respectively welded technique block C11 and technique block
D12, the both sides in the face between side E and side C are respectively welded technique block A9 and technique block B10, solve multiple edge body case
The machining angle measurement problem of each side of body；Transition claw A17, transition claw are being set corresponding to 1 both sides of casing on angle
B18, used when convenience is with being loaded；Correlated parts in the system of I holes and rack sleeve are combined processing, guarantee finally uses shape
The depth of parallelism requirement of holes system reaches 0.02mm during state, and axiality requirement reaches 0.02mm, and cylindricity requirement in hole reaches 0.02mm,
Reach 0.02mm with the requirement of reference plane perpendicularity.
【Brief description of the drawings】
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the top view of casing of the present invention；
Fig. 3 is Fig. 2 of the present invention A-A sectional views；
Fig. 4 is the top view for the casing that the present invention is welded with technique block；
Fig. 5 is the casing of the invention for being equipped with rack sleeve B-B positions sectional view in Fig. 4；
Fig. 6 is the top view of casing when the present invention has transition claw assistant assembleing and fixing；
In figure：1st, casing；2nd, I holes system end face A；3rd, I holes system endoporus A；4th, I holes system end face B；5th, I holes system endoporus B；6、I
Hole system end face C；7th, I holes system endoporus C；8th, I holes upper surface；9th, technique block A；10th, technique block B；11st, technique block C；12nd, technique block
D；13rd, technique block E；14th, technique block F；15th, rack sleeve；16th, endoporus；17th, transition claw A；18th, transition claw B.
【Embodiment】
With reference to the following examples, the present invention can be explained in greater detail；But the invention is not limited in these are implemented
Example.
The manufacture craft of large-scale multiple edge body box part with reference to described in accompanying drawing 1-6, the technique include preparing casing 1
Rough casting, Welding block, line, it is rough turn, rough mill, heavy boring, ultrasonic examination and artificial aging, turning, half finish-milling, assembling,
Smart car, finish-milling, right boring and the processing step for removing technique block, concrete operation step are as follows：
1）Prepare the rough casting of casing 1：
Prepare the rough casting of casing 1 that profile is hexagonal prism shape；
2）Welding block
In side, D both sides are respectively welded technique block F14 and technique block E13, the face between side F and side C
Both sides are respectively welded technique block C11 and technique block D12, and the both sides in the face between side E and side C are respectively welded technique
Block A9 and technique block B10；
3）Line
After checking each size surplus of blank, the rice word center line of casing is drawn, is rule on each working position；
4）It is rough turn
I holes system end face A2, I hole system end face B4, I hole system end face C6, I hole upper surface 8 in rough turn I holes system, I holes system endoporus
A3, I hole system endoporus B5 and I holes system endoporus C7, and leave 10mm allowance；
5）Rough mill, heavy boring
Side C, side D, side E and side F, heavy boring II holes Xi Zhongge holes and its end face are rough milled by line, stays 10mm to add
Spare time measures；
6）Ultrasonic examination and artificial aging
7）Turning
Turning I holes system, levelling upper surface, centering I holes system endoporus B 5, make the center of 1 hole system and lathe centre of gyration weight
Close, centering franchise is 0.05mm, I holes system end face A 2, I holes system endoporus A 3, I holes system end face 4, the I holes system endoporus of smart car casing 1
B 5 and I holes system end face C 6, is worked into drawing size；Remaining position of the I holes system of half smart car casing 1, stays 3mm allowance；
Transition claw A17, transition claw B18 are being set corresponding to 1 both sides of casing on angle, used when convenience is with being loaded, in I holes system
Turning centering band on middle I holes system endoporus B 5, upper surface is leveled up when adjusting dress, by the centering band centering center of turning, franchise is
0.05mm；
8）Half finish-milling
Levelling I holes upper surface 8, centering I holes system endoporus B 5, make the center of I holes system and the center weight of machine tool rotary working table
Close, centering franchise is 0.05mm；Milling side C, side D, side E, side F, miller skill block A9, technique block B10, technique block C11,
Technique block D12, technique block E13, technique block F14 and other non-key positions, and stay 3mm allowance；Folder between per two sides
Angle is 60 ° of ± 5 ˊ；
9）Assembling
Assemble correlated parts in the system of I holes, including rack sleeve 15；
10）Smart car
With the I holes upper surface 8 of casing 1 and I holes system endoporus 5 for centering benchmark, centering franchise 0.01mm/m, using transition card
I holes system end face A2, I hole in the I holes system of pawl 17 and the assistant assembleing and fixing of transition claw 18, turnery processing casing 1 and rack sleeve 15
It is end face B4, I hole upper surface 8, I holes system endoporus B5；I holes system endoporus A3, I holes system end face C6 and I hole system endoporus C7, adjust dress processing
When still with the I holes upper surface 8 of casing 1 for centering benchmark, centering franchise is 0.01mm/m.With the rack sleeve 15 of machined completion
Endoporus 16 on the basis of centering center, centering franchise is 0.02mm；
11）Finish-milling
Angle 6 between checking per two sides
0 ° of ± 5 ˊ, check the distance that center line is arrived per side, meet the requirements, correctly after, then on digital-control boring-milling machine
Finish-milling process, finish-milling side C, side D, side E, side F, technique block A9, technique block B10, technique block C11, technique block D12,
Technique block E13, technique block F14 and other non-key positions, it is levelling benchmark with the I holes upper surface 8 of casing 1, with rack sleeve
The 10 centering centre of gyration of endoporus 11, makes the center of I holes system and the center superposition of machine tool rotary working table, centering franchise is
0.02mm；
12）Right boring
Right boring II holes Xi Ge holes and its end face, the I holes upper surface 8 of casing 1 is directed at digital-control boring-milling machine cutter shaft, with I holes system hole
The axle center of the middle endoporus 16 of rack sleeve 15 is looked for directly, levelling, ensures the depth of parallelism 0.02mm with II holes system.
13）Technique block A9, technique block B10, technique block C11, technique block D12, technique block E13 and technique block F14 are removed, i.e.,
Complete the making of large-scale multiple edge body box part.
The manufacture craft of described large-scale multiple edge body box part, in welding step, welding procedure block is spot welding.
The manufacture craft of described large-scale multiple edge body box part, in finish-milling and right boring step, digital-control boring-milling machine is height
The digital-control boring-milling machine of precision.
Embodiment 1：
1）Prepare the rough casting of casing 1：
Prepare the rough casting of casing 1 that profile is hexagonal prism shape；
2）Welding block
In side, D both sides are respectively welded technique block F14 and technique block E13, the face between side F and side C
Both sides are respectively welded technique block C11 and technique block D12, and the both sides in the face between side E and side C are respectively welded technique
Block A9 and technique block B10, technique block are used for measuring, examining rotary table angle precision, ensure angle between each side all
It is in the range of 60 ° of ± 5 ˊ, the welding manner of technique block is spot welding；
3）Line
After checking each size surplus of blank, the rice word center line of casing is drawn, is rule on each working position；
4）It is rough turn
I holes system end face A2, I hole system end face B4, I hole system end face C6, I hole upper surface 8 in rough turn I holes system, I holes system endoporus
A3, I hole system endoporus B5 and I holes system endoporus C7, and 10mm allowance is left, when being loaded using transition claw 17, transition
Claw 18 is loaded, the turning centering band on I holes system endoporus 5 in the system of I holes, by the centering of turning with centering when adjusting dress.；
5）Rough mill, heavy boring
Side C, side D, side E and side F, heavy boring II holes Xi Zhongge holes and its end face are rough milled by line, stays 10mm to add
Spare time measures；
6）Ultrasonic examination and artificial aging
7）Turning
Turning I holes system, levelling upper surface, centering I holes system endoporus B 5, make the center of 1 hole system and lathe centre of gyration weight
Close, centering franchise is 0.05mm, I holes system end face A 2, I holes system endoporus A 3, I holes system end face 4, the I holes system endoporus of smart car casing 1
B 5 and I holes system end face C 6, is worked into drawing size；Remaining position of the I holes system of half smart car casing 1, stays 3mm allowance；
Transition claw A17, transition claw B18 are being set corresponding to 1 both sides of casing on angle, used when convenience is with being loaded, in I holes system
Turning centering band on middle I holes system endoporus B 5, upper surface is leveled up when adjusting dress, by the centering band centering center of turning, franchise is
0.05mm；
8）Half finish-milling
Levelling I holes upper surface 8, centering I holes system endoporus B 5, make the center of I holes system and the center weight of machine tool rotary working table
Close, centering franchise is 0.05mm；Milling side C, side D, side E, side F, miller skill block A9, technique block B10, technique block C11,
Technique block D12, technique block E13, technique block F14 and other non-key positions, and stay 3mm allowance；Folder between per two sides
Angle be 60 ° of ± 5 ˊ be by platen rotating accuracy ensure, it is necessary to using technique block A9, technique block B10, technique block C11,
Technique block D12, technique block E13 and technique block F14 subsidiary angles；
9）Assembling
Assemble correlated parts in the system of I holes, including rack sleeve 15；
10）Smart car
With the I holes upper surface 8 of casing 1 and I holes system endoporus 5 for centering benchmark, centering franchise 0.01mm/m, using transition card
I holes system end face A2, I hole in the I holes system of pawl 17 and the assistant assembleing and fixing of transition claw 18, turnery processing casing 1 and rack sleeve 15
It is end face B4, I hole upper surface 8, I holes system endoporus B5；I holes system endoporus A3, I holes system end face C6 and I hole system endoporus C7, adjust dress processing
When still with the I holes upper surface 8 of casing 1 for centering benchmark, centering franchise is 0.01mm/m.With the rack sleeve 15 of machined completion
Endoporus 16 on the basis of centering center, centering franchise is 0.02mm；
11）Finish-milling
60 ° of ± 5 ˊ of angle between checking per two sides, check per side to the distance of center line, meet the requirements, correctly
After errorless, then finish-milling is processed on digital-control boring-milling machine, finish-milling side C, side D, side E, side F, technique block A9, technique block
B10, technique block C11, technique block D12, technique block E13, technique block F14 and other non-key positions, with the I holes upper end of casing 1
Face 8 is levelling benchmark, with the centering centre of gyration of endoporus 11 of rack sleeve 10, makes center and the machine tool rotary working table of I holes system
Center superposition, centering franchise is 0.02mm；Finish-milling side C, side D, side E, side F, technique block 1, technique block 2, technique
Block 3, technique block 4, technique block 5, technique block 6, first examination processing, 60 ° of ± 5 ˊ of angle between checking per two sides, check and are arrived per side
The distance of center line, meet the requirements, it is correct after, could complete finish-milling and process, otherwise angle of revolution is compensated, it is right
The processing cutting output of side is finely adjusted；
12）Right boring
Right boring II holes Xi Ge holes and its end face, the I holes upper surface 8 of casing 1 is directed at digital-control boring-milling machine cutter shaft, with I holes system hole
The axle center of the middle endoporus 16 of rack sleeve 15 is looked for directly, levelling, ensures the depth of parallelism 0.02mm with II holes system.
13）Technique block A9, technique block B10, technique block C11, technique block D12, technique block E13 and technique block F14 are removed, i.e.,
Complete the making of large-scale multiple edge body box part；
The side C of large-scale multiple edge body box part that completes, side D, side E and F flatness are 0.01mm, perpendicularity
For 0.02mm, roughness Ra1.6, often 60 ° of ± 5 ˊ of angle between two sides, consistent with distance between center line, in the blank of casing 1
Portion includes two hole systems of I, II, and II holes are made up of the multiple hole of 200~Φ of Φ 500, and each hole axiality is within 0.02mm；I holes
System is made up of the multiple hole of 1000~Φ of Φ 3000, and each hole axiality is 0.02mm, and hole cylindricity is 0.02mm, vertical with reference plane
Spend for 0.02mm, be 0.02mm with the II holes system depth of parallelism.
The embodiment selected herein for the open purpose of the present invention, is presently considered to be suitable, but answer
Solution, it is contemplated that all changes and improvement including all embodiments belonged in this design and the scope of the invention.
Claims (3)
1. a kind of manufacture craft of large-scale multiple edge body box part, the technique includes preparing casing（1）Rough casting, welder
Skill block, line, it is rough turn, rough mill, heavy boring, ultrasonic examination and artificial aging, turning, half finish-milling, assembling, smart car, finish-milling, right boring
With remove technique block processing step, it is characterized in that：Concrete operation step is as follows：
1）Prepare casing（1）Rough casting：
Prepare the casing that profile is hexagonal prism shape（1）Rough casting；
2）Welding block
Previous step is connect, D both sides are respectively welded technique block F in side（14）With technique block E（13）, the F and side C in side
Between the both sides in face be respectively welded technique block C（11）With technique block D（12）, the both sides in the face between side E and side C
It is respectively welded technique block A（9）With technique block B（10）；
3）Line
Previous step is connect, after checking each size surplus of blank, the rice word center line of casing is drawn, is rule on each working position；
4）It is rough turn
Connect previous step, the I holes system end face A in rough turn I holes system（2）, I holes system end face B（4）, I holes system end face C（6）, I holes upper end
Face（8）, I holes system endoporus A（3）, I holes system endoporus B（5）And I holes system endoporus C（7）, and leave 10mm allowance；
5）Rough mill, heavy boring
Previous step is connect, side C, side D, side E and side F, heavy boring II holes Xi Zhongge holes and its end face is rough milled by line, stays
10mm allowance；
6）Ultrasonic examination and artificial aging
7）Turning
Meet previous step, turning I holes system, levelling upper surface, centering I holes system endoporus B（5）, the center and lathe that make I holes system are turned round
Center superposition, centering franchise are 0.05mm, smart car casing（1）I holes system end face A（2）, I holes system endoporus A（3）, I holes system end face
（4）, I holes system endoporus B（5）With I holes system end face C（6）, it is worked into drawing size；Half smart car casing（1）I holes system its remaining part
Position, stays 3mm allowance；In casing（1）Transition claw A is set corresponding to both sides on angle（17）, transition claw B（18）,
Used when conveniently with being loaded, the I holes system endoporus B in the system of I holes（5）Upper turning centering band, upper surface is leveled up when adjusting dress, by turning
Centering band centering center, franchise 0.05mm；
8）Half finish-milling
Connect previous step, levelling I holes upper surface（8）, centering I holes system endoporus B（5）, make the center of I holes system and machine tool rotary work
Make the center superposition of platform, centering franchise is 0.05mm；Milling side C, side D, side E, side F, miller skill block A（9）, technique block
B（10）, technique block C（11）, technique block D（12）, technique block E（13）, technique block F（14）And other non-key positions, and stay 3mm
Allowance；Angle between per two sides is 60 ° of ± 5 ˊ；
9）Assembling
Previous step is connect, assembles correlated parts in the system of I holes, including rack sleeve（15）；
10）Smart car
Previous step is connect, with the I holes upper surface of casing 1（8）With I holes system endoporus（5）For centering benchmark, centering franchise 0.01mm/
M, using transition claw（17）With transition claw（18）Assistant assembleing and fixing, turnery processing casing（1）And rack sleeve（15）I holes system
In I holes system end face A（2）, I holes system end face B（4）, I holes upper surface（8）, I holes system endoporus B（5）；I holes system endoporus A（3）, I holes
It is end face C（6）With I holes system endoporus C（7）, still with casing when adjusting dress processing（1）I holes upper surface（8）For centering benchmark, centering
Franchise is 0.01mm/m, with the rack sleeve of machined completion（15）Endoporus（16）On the basis of centering center, centering franchise is
0.02mm；
11）Finish-milling
Previous step is connect, 60 ° of ± 5 ˊ of angle between checking per two sides, checks per side to the distance of center line, conforms to
Ask, it is correct after, then finish-milling is processed on digital-control boring-milling machine, finish-milling side C, side D, side E, side F, technique block A
（9）, technique block B（10）, technique block C（11）, technique block D（12）, technique block E（13）, technique block F（14）With other non-key portions
Position, with casing（1）I holes upper surface（8）For levelling benchmark, with rack sleeve（10）Endoporus（11）The centering centre of gyration, makes I
The center of hole system and the center superposition of machine tool rotary working table, centering franchise are 0.02mm；
12）Right boring
Connect previous step, right boring II holes Xi Ge holes and its end face, casing（1）I holes upper surface（8）It is directed at digital-control boring-milling machine knife
Axle, with rack sleeve in I holes system hole（15）Endoporus（16）Axle center look for directly, it is levelling, ensure and the depth of parallelism 0.02mm of II holes system；
13）Previous step is connect, removes technique block A（9）, technique block B（10）, technique block C（11）, technique block D（12）, technique block E
（13）With technique block F（14）, that is, complete the making of large-scale multiple edge body box part.
2. the manufacture craft of large-scale multiple edge body box part according to claim 1, it is characterized in that：In Welding block step
In, the mode of welding procedure block is spot welding.
3. the manufacture craft of large-scale multiple edge body box part according to claim 1, it is characterized in that：Walked in finish-milling and right boring
In rapid, digital-control boring-milling machine is high-precision digital-control boring-milling machine.
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| CN201410230803.6A CN105290713B (en) | 2014-05-29 | 2014-05-29 | A kind of manufacture craft of large-scale multiple edge body box part |
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|---|---|---|---|
| CN201410230803.6A CN105290713B (en) | 2014-05-29 | 2014-05-29 | A kind of manufacture craft of large-scale multiple edge body box part |
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| CN105290713A CN105290713A (en) | 2016-02-03 |
| CN105290713B true CN105290713B (en) | 2017-12-22 |
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| CN111496541B (en) * | 2019-07-15 | 2021-06-04 | 青岛鲁强模具有限公司 | Heavy-load chassis machining process |
| CN111552230A (en) * | 2020-04-03 | 2020-08-18 | 中国航发哈尔滨东安发动机有限公司 | Single machine automatic alignment calculation-free processing method |
| CN113695856B (en) * | 2021-09-09 | 2024-01-02 | 贵州詹阳动力重工有限公司 | Processing method of rear connecting seat and rear connecting seat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB585938A (en) * | 1944-07-25 | 1947-02-28 | Borg Warner | Improvements in or relating to methods of assembling a vaned element of a fluid coupling and the improved fluid coupling element |
| GB657113A (en) * | 1947-06-11 | 1951-09-12 | Vadolt Trust | Method of producing a soft, flexible and resilient surface layer on bodies of a hard, non-resilient material and bodies of a hard material capable of being shaped by machining |
| GB742923A (en) * | 1950-11-04 | 1956-01-04 | Illinois Tool Works | Improvements relating to the production of permanently assembled washers and nuts |
| CN102205479B (en) * | 2010-09-21 | 2013-04-17 | 南车戚墅堰机车有限公司 | Process for controlling deformation of axle-hung box of locomotive |
| CN102642114B (en) * | 2012-04-10 | 2014-08-06 | 中信重工机械股份有限公司 | Machining method of perpendicularly intersected hole system of speed reducer body |
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