CN110193584A - A kind of grass trimmer crank blank forging technique - Google Patents
A kind of grass trimmer crank blank forging technique Download PDFInfo
- Publication number
- CN110193584A CN110193584A CN201910504342.XA CN201910504342A CN110193584A CN 110193584 A CN110193584 A CN 110193584A CN 201910504342 A CN201910504342 A CN 201910504342A CN 110193584 A CN110193584 A CN 110193584A
- Authority
- CN
- China
- Prior art keywords
- blank
- forging
- shot
- bar
- grass trimmer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
-
- 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
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
-
- 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
- B21J5/002—Hybrid process, e.g. forging following casting
-
- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- 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
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/08—Making machine elements axles or shafts crankshafts
Abstract
The invention discloses a kind of grass trimmer crank blank forging techniques, which comprises the following steps: blanking: blank is cut to the bar of φ 20X67 by S1；Deburring, removal of impurities: bar is sent into compressed air shotblasting machine, shot-peening 15-20 minutes, until the burr of blank, oxide skin are thrown only by S2 by crawler belt；Heating: blank bar is sent into intermediate frequency heating to 1000 ± 50 DEG C, propulsion frequency is 8s-10s/ part by S3；S4, forging: bending, blocking, finish forge, punching, forging temperature are controlled at 730 DEG C~1040 DEG C；Heat treatment: S5 does normalized treatment to forging；S6, descale: bar after cooling is sent into compressed air shotblasting machine by crawler belt, shot-peening 20-25 minutes, until the burr of blank, oxide skin are thrown only, its key points of the technical solution are that carrying out Shot Blasting to raw material removes impurity, material purity is promoted, heating time of strict control forging, bending temperature, blocking and finish forge number and temperature, rigidity, toughness and the wearability of effective lift crank.
Description
Technical field
The present invention relates to technical field of forging, more specifically, it relates to a kind of grass trimmer crank blank forging technique.
Background technique
The kernel component for the lawn mower engine that crank is, high-speed rotation when work, it and connecting rod cooperate when work
Effect, the gas pressure that will act on piston are changed into rotary power, send transmission mechanism to.It is bent because working environment is severe
Handle subjects the periodically variable huge moment of flexure in direction and torque, and since crank works for a long time, to crank material
Rigidity, toughness and the wearability of matter are proposed very high requirement.
Existing grass trimmer crank processing technology production efficiency and the degree of automation are all lower, are generally divided into roughing and essence
Two step of fining-off, roughing use the shaft end of lathe turning crank, and process stability is poor；Retrofit be divided into corase grinding, half fine grinding,
The processes such as fine grinding, polishing are not only processed fineness and are not reached requirement, and manufacturing procedure is cumbersome, usually also needs human assistance complete
At, serious restriction manufacturing schedule, for the Continuous maching operation for adapting to high-volume crank, it is necessary to processing technology to crank and plus
Work method improves.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of grass trimmer crank blank forging work
Skill has and is able to ascend crank rigidity, the advantage of toughness and wearability.
To achieve the above object, the present invention provides the following technical scheme that
A kind of grass trimmer crank blank forging technique, which comprises the following steps:
Blanking: blank is cut to the bar of φ 20X67 by S1；
Deburring, removal of impurities: bar is sent into compressed air shotblasting machine, shot-peening 15-20 minutes, until burr, the oxygen of blank by S2 by crawler belt
Change skin to throw only；
Heating: blank bar is sent into intermediate frequency heating to 1000 ± 50 DEG C, propulsion frequency is 8s-10s/ part by S3；
S4, forging: being bent bar using bending mould, carries out blocking and essence to bar using blocking and finish forge mould
Forging, is finally punched out with shaving die, and bending mould includes bending slot, and bending slot side, which has, prevents forging from generating folding
Positioning region, shaving die include cutter, have on cutter and avoid the remaining recessing groove of mandril, forging temperature control 730 DEG C~
1040℃；
Heat treatment: S5 does isothermal normalizing processing to forging；
Descale: bar after cooling is sent into compressed air shotblasting machine, shot-peening 20-25 minutes, until the hair of blank by S6 by crawler belt
Thorn, oxide skin are thrown net.
Preferably, blank raw material is 42CrMoA, material specification φ 20 in step S1.
Preferably, in 0.2~0.3mmA, shot-peening uses shot for shot peening strength control in step S2, and shot size is φ
0.8mm。
Preferably, flexure temperature is controlled at 1000 DEG C~1040 DEG C in step S4.
Preferably, blocking number is 2-3 times in step S4, and temperature is controlled at 860 DEG C~1020 DEG C.
Preferably, finish forge temperature is controlled at 800 DEG C~830 DEG C in step S4.
Preferably, it is every secondary control in 3~4mm that the depth of cut is punched in step S4.
Preferably, in 0.15~0.2mmA, shot-peening uses shot for shot peening strength control in step S6, and shot size is φ
0.8mm。
Compared with prior art, the invention has the following advantages:
1, Shot Blasting is carried out to raw material and removes impurity, promote material purity, the heating time of strict control forging, bending temperature
The number and temperature of degree, blocking and finish forge, rigidity, toughness and the wearability of effective lift crank；
2, to prevent forging from generating folding, design has the crank special bending mould of positioning region, greatly increases yield rate；Trimming
When be to prevent from causing scrapping for product, shaving die is designed using recessing groove, is reduced, is avoided the occurrence of the case where mandril residual.
Detailed description of the invention
Fig. 1 is process flow diagram；
Fig. 2 is the structural schematic diagram of Bending Mould；
Fig. 3 is the structural schematic diagram of shaving die.
In figure: 1, bending seat；2, bender；3, bending slot；4, positioning region；5, trimming die holder；6, cutter；7, recessing groove.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
A kind of grass trimmer crank blank forging technique, referring to Fig.1 comprising following steps:
Blanking: blank is cut to the bar of φ 20X67 by S1；Blank raw material is 42CrMoA, material specification φ 20；
Deburring, removal of impurities: bar is sent into compressed air shotblasting machine, shot-peening 15-20 minutes, until burr, the oxygen of blank by S2 by crawler belt
Change skin to throw only；In 0.2~0.3mmA, shot-peening uses shot for shot peening strength control, and shot size is φ 0.8mm, is effectively removed miscellaneous
Matter and oxide skin promote blank purity, to promote forging quality.
Heating: blank bar is sent into intermediate frequency heating to 1000 ± 50 DEG C, propulsion frequency is 8s-10s/ part by S3；Blank
It is sent by material handler clamping to forging station after submitting.
S4, forging: being bent bar using bending mould, and flexure temperature is controlled at 1000 DEG C~1040 DEG C.Using
Blocking and finish forge mould carry out blocking and finish forge to bar, are finally punched out with shaving die；
Referring to Fig. 2, bending mould includes bending seat, bender and bending slot, and bending slot side, which has, prevents forging from generating folding
Positioning region；
Referring to Fig. 3, shaving die includes trimming die holder and cutter, has on the blade of cutter and avoids the remaining recessing groove of mandril；
Forging temperature is controlled at 730 DEG C~1040 DEG C；Flexure temperature is controlled at 1000 DEG C~1040 DEG C.Blocking number is 2-3 times,
Temperature is controlled at 860 DEG C~1020 DEG C.Finish forge temperature is controlled at 800 DEG C~830 DEG C.Be punched the depth of cut be every secondary control 3~
4mm。
Heat treatment: S5 does isothermal normalizing processing to forging；
Descale: bar after cooling is sent into compressed air shotblasting machine, shot-peening 20-25 minutes, until the hair of blank by S6 by crawler belt
Thorn, oxide skin are thrown net.In 0.15~0.2mmA, shot-peening uses shot for shot peening strength control, and shot size is φ 0.8mm.
The present embodiment is only explanation of the invention, is not limitation of the present invention, and those skilled in the art exist
It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in the present invention
Scope of the claims in all by the protection of Patent Law.
Claims (8)
1. a kind of grass trimmer crank blank forging technique, which comprises the following steps:
Blanking: blank is cut to the bar of φ 20X67 by S1；
Deburring, removal of impurities: bar is sent into compressed air shotblasting machine, shot-peening 15-20 minutes, until burr, the oxygen of blank by S2 by crawler belt
Change skin to throw only；
Heating: blank bar is sent into intermediate frequency heating to 1000 ± 50 DEG C, propulsion frequency is 8s-10s/ part by S3；
S4, forging: being bent bar using bending mould, carries out blocking and essence to bar using blocking and finish forge mould
Forging, is finally punched out with shaving die, and bending mould includes bending slot, and bending slot side, which has, prevents forging from generating folding
Positioning region, shaving die include cutter, have on cutter and avoid the remaining recessing groove of mandril, forging temperature control 730 DEG C~
1040℃；
Heat treatment: S5 does isothermal normalizing processing to forging；
Descale: bar after cooling is sent into compressed air shotblasting machine, shot-peening 20-25 minutes, until the hair of blank by S6 by crawler belt
Thorn, oxide skin are thrown net.
2. grass trimmer according to claim 1 crank blank forging technique, it is characterised in that: blank raw material in step S1
For 42CrMoA, material specification φ 20.
3. grass trimmer according to claim 1 crank blank forging technique, it is characterised in that: shot peening strength in step S2
In 0.2~0.3mmA, shot-peening uses shot for control, and shot size is φ 0.8mm.
4. grass trimmer according to claim 1 crank blank forging technique, it is characterised in that: flexure temperature in step S4
Control is at 1000 DEG C~1040 DEG C.
5. grass trimmer according to claim 4 crank blank forging technique, it is characterised in that: blocking number in step S4
It is 2-3 times, temperature is controlled at 860 DEG C~1020 DEG C.
6. grass trimmer according to claim 1 crank blank forging technique, it is characterised in that: finish forge temperature in step S4
Control is at 800 DEG C~830 DEG C.
7. grass trimmer according to claim 1 crank blank forging technique, it is characterised in that: be punched feed in step S4
Amount is every secondary control in 3~4mm.
8. grass trimmer according to claim 1 crank blank forging technique, it is characterised in that: shot peening strength in step S6
In 0.15~0.2mmA, shot-peening uses shot for control, and shot size is φ 0.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504342.XA CN110193584A (en) | 2019-06-12 | 2019-06-12 | A kind of grass trimmer crank blank forging technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910504342.XA CN110193584A (en) | 2019-06-12 | 2019-06-12 | A kind of grass trimmer crank blank forging technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110193584A true CN110193584A (en) | 2019-09-03 |
Family
ID=67754398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910504342.XA Pending CN110193584A (en) | 2019-06-12 | 2019-06-12 | A kind of grass trimmer crank blank forging technique |
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| CN (1) | CN110193584A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112427590A (en) * | 2020-10-30 | 2021-03-02 | 江西省从众机械有限公司 | Forging process and device for seahorse-shaped forged piece |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2880318Y (en) * | 2006-01-25 | 2007-03-21 | 武汉重工铸锻有限责任公司 | Adjustable device of large diesel oil engine crankshaft toggle forge parts for bend forging ship |
| CN1947886A (en) * | 2006-11-01 | 2007-04-18 | 中国科学院金属研究所 | Equipment for bend-forging crank axle toggle of large ship and method for forging the same |
| CN102297116A (en) * | 2011-07-18 | 2011-12-28 | 上海电气压缩机泵业有限公司 | Large die-forged connecting rod for compressors |
| CN102989940A (en) * | 2012-08-22 | 2013-03-27 | 昌利锻造有限公司 | Processing method of positioning hook forge piece |
| CN106180500A (en) * | 2016-07-19 | 2016-12-07 | 苏州誉衡昌精密机械有限公司 | A kind of Forging Technology of square precision workpiece |
| CN107282839A (en) * | 2017-08-01 | 2017-10-24 | 台州市宇鹏机械锻造有限公司 | A kind of forging technology of forging |
-
2019
- 2019-06-12 CN CN201910504342.XA patent/CN110193584A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2880318Y (en) * | 2006-01-25 | 2007-03-21 | 武汉重工铸锻有限责任公司 | Adjustable device of large diesel oil engine crankshaft toggle forge parts for bend forging ship |
| CN1947886A (en) * | 2006-11-01 | 2007-04-18 | 中国科学院金属研究所 | Equipment for bend-forging crank axle toggle of large ship and method for forging the same |
| CN102297116A (en) * | 2011-07-18 | 2011-12-28 | 上海电气压缩机泵业有限公司 | Large die-forged connecting rod for compressors |
| CN102989940A (en) * | 2012-08-22 | 2013-03-27 | 昌利锻造有限公司 | Processing method of positioning hook forge piece |
| CN106180500A (en) * | 2016-07-19 | 2016-12-07 | 苏州誉衡昌精密机械有限公司 | A kind of Forging Technology of square precision workpiece |
| CN107282839A (en) * | 2017-08-01 | 2017-10-24 | 台州市宇鹏机械锻造有限公司 | A kind of forging technology of forging |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112427590A (en) * | 2020-10-30 | 2021-03-02 | 江西省从众机械有限公司 | Forging process and device for seahorse-shaped forged piece |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190903 |
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| RJ01 | Rejection of invention patent application after publication |