CN106040958A - Machining technology of large holding clamp on electro-hydraulic hammer - Google Patents
Machining technology of large holding clamp on electro-hydraulic hammer Download PDFInfo
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- CN106040958A CN106040958A CN201610454000.8A CN201610454000A CN106040958A CN 106040958 A CN106040958 A CN 106040958A CN 201610454000 A CN201610454000 A CN 201610454000A CN 106040958 A CN106040958 A CN 106040958A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K5/00—Making tools or tool parts, e.g. pliers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
Abstract
The invention relates to a machining technology of a large holding clamp on an electro-hydraulic hammer, and belongs to the technical field of machining of large holding clamps on electro-hydraulic hammers. The technology comprises the following steps that (1) a blank is selected, and the blank is placed on a sawing machine to be subjected to rough machining; (2) the blank is placed in a heating furnace to be preheated; (3) the blank is subjected to primary heating, then primary heat preservation is carried out, and then the blank is subjected to upsetting; (4) the blank obtained after upsetting is subjected to secondary heating, then secondary heat preservation is carried out, and then the blank is drawn; (5) the blank obtained after upsetting is subjected to tertiary heating, then tertiary heat preservation is carried out, and then the blank is subjected to bend forging; and (6) the blank is subjected to quartus heating, then quartus heat preservation is carried out, the blank is cooled in the furnace till the temperature ranges from 550 DEG C to 600 DEG C, and then the blank is discharged out of the furnace for air cooling till the room temperature is achieved. The large holding clamp on the electro-hydraulic hammer saves raw materials and is not prone to being broken off, good in product quality and good in holding-on performance.
Description
Technical field
The invention belongs to big embracing on Single arm and clamp processing technique field, particularly relate to the big processing embracing pincers on a kind of Single arm
Technique.
Background technology
Single arm is that one utilizes hydraulic system to promote tup, hits a kind of forging equipment of blank molding.On Single arm
Big pincers of embracing are usually used in forging the operations such as module, the forging molding of pie heavy in section, annular forging piece ejection.At present, Single arm is embraced greatly
Pincers use steel plate excision forming, and waste of raw materials is serious, easily snaps off, poor product quality, and big armful of pincers are easy when operation
Blocking operator's sight line, big pincers of embracing are engaged poor performance.
Summary of the invention
The technical problem to be solved is to provide the big processing technique embracing pincers on a kind of Single arm.
For solving the problems referred to above, the big processing technique embracing pincers on a kind of Single arm of the present invention, this technique be by with
Lower step forms:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 220～260 DEG C, is then incubated,
Holding temperature is 220～260 DEG C, and temperature retention time is 1～1.5 hour；
(3) once being heated by blank, one time heating-up temperature is 1080～1120 DEG C, firing rate is 80～90 DEG C/
H, is the most once incubated, and one time holding temperature is 1080～1120 DEG C, and one time temperature retention time is 5～6 hours, then by base
Material carries out jumping-up, and forging ratio is 0.4～0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 960～1020 DEG C, then carries out secondary
Insulation, secondary holding temperature is 960～1020 DEG C, and secondary temperature retention time is 3～4 hours, then places the blanks on lower flat anvil
Pulling out, anvil width ratio is 1.4～1.6；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 850～880 DEG C, then carries out three times and protects
Temperature, three times holding temperature is 850～880 DEG C, and three times temperature retention time is 2～3 hours, then places the blanks on and carries out on lower flat anvil
Curved forging, two wall the most curved forging molding during forging, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 850～900 DEG C, then carries out four times and is incubated, four times
Holding temperature is 850～900 DEG C, and four times temperature retention time is 7～8 hours, is cooled to 550～600 DEG C in stove, sky of then coming out of the stove
It is cooled to room temperature, eliminates residualinternal stress.
Compared with prior art, the invention have the advantages that on the Single arm of the present invention, raw material saved by big pincers of embracing；This
On the Single arm of invention, big pincers of embracing are not easy to fracture, good product quality；On the Single arm of the present invention, big pincers of embracing will not when operation
Block operator's sight line；On the Single arm of the present invention, big armful of pincers occlusion performance is good.
Detailed description of the invention
Embodiment 1
The big processing technique embracing pincers on a kind of Single arm, this technique is to comprise the steps of:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 220 DEG C, is then incubated, insulation temperature
Degree is 220 DEG C, and temperature retention time is 1 hour；
(3) once being heated by blank, one time heating-up temperature is 1080 DEG C, and firing rate is 80 DEG C/h, then carries out
Once being incubated, one time holding temperature is 1080 DEG C, and one time temperature retention time is 5 hours, then blank is carried out jumping-up, and forging ratio is
0.4；
(4) blank after jumping-up carrying out post bake, post bake temperature is 960 DEG C, then carries out secondary insulation, two
Secondary holding temperature is 960 DEG C, and secondary temperature retention time is 3 hours, then places the blanks on and pulls out on lower flat anvil, and anvil width ratio is
1.4；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 850 DEG C, then carries out three times and is incubated, three
Secondary holding temperature is 850 DEG C, and three times temperature retention time is 2 hours, then places the blanks on and carries out curved forging on lower flat anvil, during forging two
The most curved forging molding of wall, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 850 DEG C, then carries out four insulations, four insulation temperature
Degree is 850 DEG C, and four times temperature retention time is 7 hours, is cooled to 550 DEG C in stove, and air cooling of then coming out of the stove, to room temperature, eliminates remaining interior
Stress.
It is demonstrated experimentally that on Single arm, raw material relatively saved by big pincers of embracing under this parameter；On Single arm, big pincers of embracing are not easy to fracture,
Good product quality.
Embodiment 2
The big processing technique embracing pincers on a kind of Single arm, this technique is to comprise the steps of:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 230 DEG C, is then incubated, insulation temperature
Degree is 230 DEG C, and temperature retention time is 1.2 hours；
(3) once being heated by blank, one time heating-up temperature is 1090 DEG C, and firing rate is 83 DEG C/h, then carries out
Once being incubated, one time holding temperature is 1090 DEG C, and one time temperature retention time is 5.3 hours, then blank is carried out jumping-up, forging ratio
It is 0.4；
(4) blank after jumping-up carrying out post bake, post bake temperature is 970 DEG C, then carries out secondary insulation, two
Secondary holding temperature is 970 DEG C, and secondary temperature retention time is 3.3 hours, then places the blanks on and pulls out on lower flat anvil, anvil width ratio
It is 1.4；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 860 DEG C, then carries out three times and is incubated, three
Secondary holding temperature is 860 DEG C, and three times temperature retention time is 2.3 hours, then places the blanks on and carries out curved forging on lower flat anvil, during forging
The two the most curved forging moldings of wall, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 870 DEG C, then carries out four insulations, four insulation temperature
Degree is 870 DEG C, and four times temperature retention time is 7.3 hours, is cooled to 560 DEG C in stove, and air cooling of then coming out of the stove, to room temperature, eliminates remnants
Internal stress.
It is demonstrated experimentally that on Single arm, raw material relatively saved by big pincers of embracing under this parameter；On Single arm, big pincers of embracing are not easy to fracture,
Product quality is preferable.
Embodiment 3
The big processing technique embracing pincers on a kind of Single arm, this technique is to comprise the steps of:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 240 DEG C, is then incubated, insulation temperature
Degree is 240 DEG C, and temperature retention time is 1.3 hours；
(3) once being heated by blank, one time heating-up temperature is 1100 DEG C, and firing rate is 85 DEG C/h, then carries out
Once being incubated, one time holding temperature is 1100 DEG C, and one time temperature retention time is 5.5 hours, then blank is carried out jumping-up, forging ratio
It is 0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 990 DEG C, then carries out secondary insulation, two
Secondary holding temperature is 990 DEG C, and secondary temperature retention time is 3.5 hours, then places the blanks on and pulls out on lower flat anvil, anvil width ratio
It is 1.5；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 865 DEG C, then carries out three times and is incubated, three
Secondary holding temperature is 865 DEG C, and three times temperature retention time is 2.5 hours, then places the blanks on and carries out curved forging on lower flat anvil, during forging
The two the most curved forging moldings of wall, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 875 DEG C, then carries out four insulations, four insulation temperature
Degree is 875 DEG C, and four times temperature retention time is 7.5 hours, is cooled to 575 DEG C in stove, and air cooling of then coming out of the stove, to room temperature, eliminates remnants
Internal stress.
Embrace pincers most save raw material it is demonstrated experimentally that big on Single arm under this parameter；On Single arm, big pincers of embracing are not easy to fracture,
Product quality is best.
Therefore, the present embodiment is preferred embodiment.
Embodiment 4
The big processing technique embracing pincers on a kind of Single arm, this technique is to comprise the steps of:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 250 DEG C, is then incubated, insulation temperature
Degree is 250 DEG C, and temperature retention time is 1.4 hours；
(3) once being heated by blank, one time heating-up temperature is 1110 DEG C, and firing rate is 88 DEG C/h, then carries out
Once being incubated, one time holding temperature is 1110 DEG C, and one time temperature retention time is 5.8 hours, then blank is carried out jumping-up, forging ratio
It is 0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 1005 DEG C, then carries out secondary insulation,
Secondary holding temperature is 1005 DEG C, and secondary temperature retention time is 3.8 hours, then places the blanks on and pulls out on lower flat anvil, anvil
Wide ratio is 1.5；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 870 DEG C, then carries out three times and is incubated, three
Secondary holding temperature is 870 DEG C, and three times temperature retention time is 2.8 hours, then places the blanks on and carries out curved forging on lower flat anvil, during forging
The two the most curved forging moldings of wall, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 890 DEG C, then carries out four insulations, four insulation temperature
Degree is 890 DEG C, and four times temperature retention time is 7.8 hours, is cooled to 590 DEG C in stove, and air cooling of then coming out of the stove, to room temperature, eliminates remnants
Internal stress.
It is demonstrated experimentally that on Single arm, relatively raw material saved by big pincers of embracing under this parameter；On Single arm, big pincers of embracing are not easy to fracture,
Product quality is best.
Embodiment 5
The big processing technique embracing pincers on a kind of Single arm, this technique is to comprise the steps of:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 260 DEG C, is then incubated, insulation temperature
Degree is 260 DEG C, and temperature retention time is 1.5 hours；
(3) once being heated by blank, one time heating-up temperature is 1120 DEG C, and firing rate is 90 DEG C/h, then carries out
Once being incubated, one time holding temperature is 1120 DEG C, and one time temperature retention time is 6 hours, then blank is carried out jumping-up, and forging ratio is
0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 1020 DEG C, then carries out secondary insulation,
Secondary holding temperature is 1020 DEG C, and secondary temperature retention time is 4 hours, then places the blanks on and pulls out on lower flat anvil, anvil width
Ratio is 1.6；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 880 DEG C, then carries out three times and is incubated, three
Secondary holding temperature is 880 DEG C, and three times temperature retention time is 3 hours, then places the blanks on and carries out curved forging on lower flat anvil, during forging two
The most curved forging molding of wall, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 900 DEG C, then carries out four insulations, four insulation temperature
Degree is 900 DEG C, and four times temperature retention time is 8 hours, is cooled to 600 DEG C in stove, and air cooling of then coming out of the stove, to room temperature, eliminates remaining interior
Stress.
It is demonstrated experimentally that on Single arm, raw material relatively saved by big pincers of embracing under this parameter；On Single arm, big pincers of embracing are not easy to fracture,
Product quality is preferable.
Claims (6)
1. the big processing technique embracing pincers on a Single arm, it is characterised in that: this technique is to comprise the steps of:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 220～260 DEG C, is then incubated, insulation
Temperature is 220～260 DEG C, and temperature retention time is 1～1.5 hour；
(3) once being heated by blank, one time heating-up temperature is 1080～1120 DEG C, and firing rate is 80～90 DEG C/h, so
After be once incubated, one time holding temperature is 1080～1120 DEG C, and one time temperature retention time is 5～6 hours, is then entered by blank
Row jumping-up, forging ratio is 0.4～0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 960～1020 DEG C, then carries out secondary insulation,
Secondary holding temperature is 960～1020 DEG C, and secondary temperature retention time is 3～4 hours, then places the blanks on and pulls out on lower flat anvil
Long, anvil width ratio is 1.4～1.6；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 850～880 DEG C, then carries out three insulations,
Three times holding temperature is 850～880 DEG C, and three times temperature retention time is 2～3 hours, then place the blanks on carry out on lower flat anvil curved
Forging, two wall the most curved forging molding during forging, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 850～900 DEG C, then carries out four insulations, four insulations
Temperature is 850～900 DEG C, and four times temperature retention time is 7～8 hours, is cooled to 550～600 DEG C in stove, then comes out of the stove air cooling extremely
Room temperature, eliminates residualinternal stress.
The big processing technique embracing pincers on a kind of Single arm, it is characterised in that: this technique is by following
Step forms:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 220 DEG C, is then incubated, and holding temperature is
220 DEG C, temperature retention time is 1 hour；
(3) once being heated by blank, one time heating-up temperature is 1080 DEG C, and firing rate is 80 DEG C/h, then carries out once
Insulation, one time holding temperature is 1080 DEG C, and one time temperature retention time is 5 hours, then blank is carried out jumping-up, and forging ratio is 0.4；
(4) blank after jumping-up carrying out post bake, post bake temperature is 960 DEG C, then carries out secondary insulation, and secondary is protected
Temperature temperature is 960 DEG C, and secondary temperature retention time is 3 hours, then places the blanks on and pulls out on lower flat anvil, and anvil width ratio is 1.4；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 850 DEG C, then carries out three insulations, protects for three times
Temperature temperature is 850 DEG C, and three times temperature retention time is 2 hours, then places the blanks on and carries out curved forging on lower flat anvil, and during forging, two walls are same
Time curved forging molding, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 850 DEG C, then carries out four insulations, and four times holding temperature is
850 DEG C, four times temperature retention time is 7 hours, is cooled to 550 DEG C in stove, and air cooling of then coming out of the stove is to room temperature.
The big processing technique embracing pincers on a kind of Single arm, it is characterised in that: this technique is by following
Step forms:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 230 DEG C, is then incubated, and holding temperature is
230 DEG C, temperature retention time is 1.2 hours；
(3) once being heated by blank, one time heating-up temperature is 1090 DEG C, and firing rate is 83 DEG C/h, then carries out once
Insulation, one time holding temperature is 1090 DEG C, and one time temperature retention time is 5.3 hours, then blank is carried out jumping-up, and forging ratio is
0.4；
(4) blank after jumping-up carrying out post bake, post bake temperature is 970 DEG C, then carries out secondary insulation, and secondary is protected
Temperature temperature is 970 DEG C, and secondary temperature retention time is 3.3 hours, then places the blanks on and pulls out on lower flat anvil, and anvil width ratio is
1.4；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 860 DEG C, then carries out three insulations, protects for three times
Temperature temperature is 860 DEG C, and three times temperature retention time is 2.3 hours, then places the blanks on and carries out curved forging on lower flat anvil, two wall during forging
The most curved forging molding, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 870 DEG C, then carries out four insulations, and four times holding temperature is
870 DEG C, four times temperature retention time is 7.3 hours, is cooled to 560 DEG C in stove, and air cooling of then coming out of the stove is to room temperature.
The big processing technique embracing pincers on a kind of Single arm, it is characterised in that: this technique is by following
Step forms:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 240 DEG C, is then incubated, and holding temperature is
240 DEG C, temperature retention time is 1.3 hours；
(3) once being heated by blank, one time heating-up temperature is 1100 DEG C, and firing rate is 85 DEG C/h, then carries out once
Insulation, one time holding temperature is 1100 DEG C, and one time temperature retention time is 5.5 hours, then blank is carried out jumping-up, and forging ratio is
0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 990 DEG C, then carries out secondary insulation, and secondary is protected
Temperature temperature is 990 DEG C, and secondary temperature retention time is 3.5 hours, then places the blanks on and pulls out on lower flat anvil, and anvil width ratio is
1.5；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 865 DEG C, then carries out three insulations, protects for three times
Temperature temperature is 865 DEG C, and three times temperature retention time is 2.5 hours, then places the blanks on and carries out curved forging on lower flat anvil, two wall during forging
The most curved forging molding, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 875 DEG C, then carries out four insulations, and four times holding temperature is
875 DEG C, four times temperature retention time is 7.5 hours, is cooled to 575 DEG C in stove, and air cooling of then coming out of the stove is to room temperature.
The big processing technique embracing pincers on a kind of Single arm, it is characterised in that: this technique is by following
Step forms:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 250 DEG C, is then incubated, and holding temperature is
250 DEG C, temperature retention time is 1.4 hours；
(3) once being heated by blank, one time heating-up temperature is 1110 DEG C, and firing rate is 88 DEG C/h, then carries out once
Insulation, one time holding temperature is 1110 DEG C, and one time temperature retention time is 5.8 hours, then blank is carried out jumping-up, and forging ratio is
0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 1005 DEG C, then carries out secondary insulation, secondary
Holding temperature is 1005 DEG C, and secondary temperature retention time is 3.8 hours, then places the blanks on and pulls out on lower flat anvil, anvil width ratio
It is 1.5；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 870 DEG C, then carries out three insulations, protects for three times
Temperature temperature is 870 DEG C, and three times temperature retention time is 2.8 hours, then places the blanks on and carries out curved forging on lower flat anvil, two wall during forging
The most curved forging molding, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 890 DEG C, then carries out four insulations, and four times holding temperature is
890 DEG C, four times temperature retention time is 7.8 hours, is cooled to 590 DEG C in stove, and air cooling of then coming out of the stove is to room temperature.
The big processing technique embracing pincers on a kind of Single arm, it is characterised in that: this technique is by following
Step forms:
(1) select blank, place the blanks on and on sawing machine, carry out roughing；
(2) being put in heating furnace by blank and preheat, pre-heating temperature is 260 DEG C, is then incubated, and holding temperature is
260 DEG C, temperature retention time is 1.5 hours；
(3) once being heated by blank, one time heating-up temperature is 1120 DEG C, and firing rate is 90 DEG C/h, then carries out once
Insulation, one time holding temperature is 1120 DEG C, and one time temperature retention time is 6 hours, then blank is carried out jumping-up, and forging ratio is 0.5；
(4) blank after jumping-up carrying out post bake, post bake temperature is 1020 DEG C, then carries out secondary insulation, secondary
Holding temperature is 1020 DEG C, and secondary temperature retention time is 4 hours, then places the blanks on and pulls out on lower flat anvil, and anvil width ratio is
1.6；
(5) blank after jumping-up carries out three heating, and three times heating-up temperature is 880 DEG C, then carries out three insulations, protects for three times
Temperature temperature is 880 DEG C, and three times temperature retention time is 3 hours, then places the blanks on and carries out curved forging on lower flat anvil, and during forging, two walls are same
Time curved forging molding, it is ensured that two-arm flexibility is consistent；
(6) blank carries out four heating, and four times heating-up temperature is 900 DEG C, then carries out four insulations, and four times holding temperature is
900 DEG C, four times temperature retention time is 8 hours, is cooled to 600 DEG C in stove, and air cooling of then coming out of the stove is to room temperature.
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| CN201610454000.8A CN106040958A (en) | 2016-06-20 | 2016-06-20 | Machining technology of large holding clamp on electro-hydraulic hammer |
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| CN201610454000.8A CN106040958A (en) | 2016-06-20 | 2016-06-20 | Machining technology of large holding clamp on electro-hydraulic hammer |
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| CN102989940A (en) * | 2012-08-22 | 2013-03-27 | 昌利锻造有限公司 | Processing method of positioning hook forge piece |
| CN104148575A (en) * | 2014-07-24 | 2014-11-19 | 浙江昌利锻造有限公司 | Process for forging shifting forks |
| CN104801643A (en) * | 2015-02-01 | 2015-07-29 | 江苏金源锻造股份有限公司 | Forging technology of lifting hook |
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