CN114160727A - Forging method for large four-claw lifting hook forge piece - Google Patents
Forging method for large four-claw lifting hook forge piece Download PDFInfo
- Publication number
- CN114160727A CN114160727A CN202111618133.1A CN202111618133A CN114160727A CN 114160727 A CN114160727 A CN 114160727A CN 202111618133 A CN202111618133 A CN 202111618133A CN 114160727 A CN114160727 A CN 114160727A
- Authority
- CN
- China
- Prior art keywords
- forging
- blank
- finished product
- steps
- following
- 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
Links
Images
Classifications
-
- 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
- B21J5/008—Incremental 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
- B21K1/72—Making machine elements hooks, e.g. crane hooks, railway track spikes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
A forging method of a large four-claw hook type forging comprises the following steps: the method comprises the following steps: pressing a clamp handle, chamfering and water gap filing treatment are carried out on the steel ingot; step two: drawing the steel ingot treated in the step one by using a WHF method to obtain a blank; step three: upsetting the blank obtained in the step two to obtain a blank L02X H0 square; step four: pressing concave shelves on the upper surface and the lower surface of the blank obtained in the step three after upsetting by adopting a special tool; step five: the four-claw hook blank rotates 90 degrees along the vertical surface to press two outer concave baffles; step six: drawing four corners to be close to the size of a finished product by using a flat anvil, and drawing four claws again to be in the set size of the process; step seven: continuously forging each part to the size of a finished product; step eight: and finishing the forging to obtain a finished product. Compared with the traditional processing method, the invention reduces the weight of the forged piece by about 15-22%, reduces the machining time by 15-22% and reduces the production cost by 16-24%. And the finished product processed by the invention has the advantages of strength andthe hardness can be improved by more than 15 percent, thereby prolonging the service life of the product.
Description
Technical Field
The invention belongs to the field of large four-jaw lifting hook forgings, and particularly relates to a forging method of a large four-jaw lifting hook forging.
Background
The large-scale four-claw hook forging is similar to a cross-shaped forging, is large in size (the single length L1 of the four claws is more than or equal to 500mm, the total length is more than or equal to 2000mm), is generally large in weight (more than or equal to 30t), is small in number of single-type marks, cannot be forged into a four-claw shape in the traditional process, is large in weight, small in number and not suitable for die forging, the forging of the forging is usually carried out on steel ingots to form square blocks, and then redundant materials at the concave part are removed to the size of a finished product through machining. In addition, in the production mode, when the groove is machined, the metal fiber streamline formed in the forging process is cut off, so that the streamline is discontinuous, the service performance of the product is influenced, and the service life of the product is influenced.
Disclosure of Invention
The invention provides a forging method of a large four-claw hook type forging, which is used for solving the problems that in the prior art, a large four-claw hook type forging (the length L1 of a single four claw is more than or equal to 500mm, the total length is more than or equal to 2000mm, and the weight is more than or equal to 30t) wastes raw materials, the machining time is long, and the performance of products is influenced by cutting off a metal fiber streamline formed in the forging process in the machining process.
The invention is realized by the following technical scheme:
a forging method of a large four-claw hook type forging comprises the following steps:
the method comprises the following steps: pressing a clamp handle, chamfering and water gap filing treatment are carried out on the steel ingot;
step two: drawing the steel ingot treated in the step one by using a WHF method to obtain a blank;
step three: upsetting the blank obtained in the step two to obtain a blank L02X H0, wherein: h0 ═ 1.05H, L0 ═ blank weight × 0.98/6.17/H0;
step four: pressing concave shelves on the upper surface and the lower surface of the blank obtained in the step three by adopting a special tool;
step five: the four-claw hook blank rotates 90 degrees along the vertical surface to press two outer concave baffles;
step six: drawing four corners to be close to the size of a finished product by using a flat anvil, flattening four sharp corners, and drawing four claws again to be in the set size of the process;
step seven: continuously forging each part to the size of a finished product;
step eight: and finishing the forging to obtain a finished product.
According to the forging method of the large four-jaw lifting hook forging, the length-diameter ratio in the drawing process in the second step is controlled to be 2-2.2.
In the forging method of the large four-jaw hook forging, the depth of the concave step in the fourth step and the fifth step is less than or equal to (L2-D1)/2.
The invention has the advantages that: the invention adopts a free forging method to renew the large-scale four-claw hook type forge piece into a four-claw shape, and compared with the traditional processing method, the invention approximately reduces the weight of the forge piece by 15-22%, reduces the mechanical processing time by 15-22%, and reduces the production cost by 16-24%. The method can greatly retain the metal fiber streamline formed by forging, and compared with the traditional manufacturing method, the strength and the hardness of the processed finished product can be improved by more than 15 percent, so that the service life of the product is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the upset blank obtained in step 3) of the present invention;
FIG. 2 is a schematic view of a fixture dedicated for the notch in step 4) of the embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the operation of pressing out the concave portion by the special tool in step 4) according to the embodiment of the present invention;
FIG. 4 is a schematic view of the workpiece pressed with the concave step in step 5) according to the embodiment of the present invention;
FIG. 5 is a schematic view of the finished workpiece in step 8) according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Examples
A new forging method for a large-sized four-claw hook type forge piece comprises the following steps:
1) pressing a clamp handle, chamfering and rolling a water gap on the steel ingot;
2) upsetting a steel ingot, drawing the steel ingot to a proper size by using a WHF method, and blanking (controlling the length-diameter ratio to be 2-2.2);
3) upsetting the billet to L02X H0 square, as shown in FIG. 1 after upsetting;
wherein: h0 ═ 1.05H, L0 ═ blank weight × 0.98/6.17/H0;
4) using a special tool (1 piece each for upper and lower parts, as shown in figure 2), pressing concave shelves with depth less than or equal to (L2-D1)/2 on the upper and lower surfaces, as shown in figure 3;
5) the four-jaw hook blank is rotated 90 degrees along a plane parallel to L0 multiplied by L0 to extrude concave shelves on the upper and lower surfaces again, as shown in figure 4;
6) drawing four corners to be close to the size of a finished product by using a flat anvil, flattening four sharp corners, and drawing four claws again to be in the set size of the process;
7) forging each part to the finished size;
8) the forging is finished to complete the forging as shown in fig. 5.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
1. A forging method of a large four-claw hook type forging is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: pressing a clamp handle, chamfering and water gap filing treatment are carried out on the steel ingot;
step two: drawing the steel ingot treated in the step one by using a WHF method to obtain a blank;
step three: upsetting the blank obtained in the step two to obtain a blank L02X H0, wherein: h0 ═ 1.05H, L0 ═ blank weight × 0.98/6.17/H0;
step four: pressing concave shelves on the upper surface and the lower surface of the blank obtained in the step three by adopting a special tool;
step five: the four-claw hook blank rotates 90 degrees along the vertical surface to press two outer concave baffles;
step six: drawing four corners to be close to the size of a finished product by using a flat anvil, flattening four sharp corners, and drawing four claws again to be in the set size of the process;
step seven: continuously forging each part to the size of a finished product;
step eight: and finishing the forging to obtain a finished product.
2. The forging method of the large four-jaw lifting hook forging according to claim 1, wherein the forging method comprises the following steps: the length-diameter ratio in the drawing process in the second step is controlled to be 2-2.2.
3. The forging method of the large four-jaw lifting hook forging according to claim 1, wherein the forging method comprises the following steps: in the fourth step and the fifth step, the depth of the concave shelves is less than or equal to (L2-D1)/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618133.1A CN114160727A (en) | 2021-12-27 | 2021-12-27 | Forging method for large four-claw lifting hook forge piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111618133.1A CN114160727A (en) | 2021-12-27 | 2021-12-27 | Forging method for large four-claw lifting hook forge piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114160727A true CN114160727A (en) | 2022-03-11 |
Family
ID=80488199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111618133.1A Pending CN114160727A (en) | 2021-12-27 | 2021-12-27 | Forging method for large four-claw lifting hook forge piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114160727A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4646551A (en) * | 1983-12-13 | 1987-03-03 | Instytut Obrobki Plastycznej | Apparatus for forging of crankshafts in presses |
| JP2002113543A (en) * | 2000-10-10 | 2002-04-16 | Ooka Giken Kk | Gear, and manufacturing method thereof |
| CN102764849A (en) * | 2012-07-18 | 2012-11-07 | 广东省韶铸集团有限公司 | Process method for forging lifting hook |
| CN104972038A (en) * | 2015-07-28 | 2015-10-14 | 刘达 | Forging forming technology of lifting hook |
| CN109433984A (en) * | 2018-12-29 | 2019-03-08 | 天津重型装备工程研究有限公司 | A kind of Whole fiber profiling forging forming method of multijaw component |
-
2021
- 2021-12-27 CN CN202111618133.1A patent/CN114160727A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4646551A (en) * | 1983-12-13 | 1987-03-03 | Instytut Obrobki Plastycznej | Apparatus for forging of crankshafts in presses |
| JP2002113543A (en) * | 2000-10-10 | 2002-04-16 | Ooka Giken Kk | Gear, and manufacturing method thereof |
| CN102764849A (en) * | 2012-07-18 | 2012-11-07 | 广东省韶铸集团有限公司 | Process method for forging lifting hook |
| CN104972038A (en) * | 2015-07-28 | 2015-10-14 | 刘达 | Forging forming technology of lifting hook |
| CN109433984A (en) * | 2018-12-29 | 2019-03-08 | 天津重型装备工程研究有限公司 | A kind of Whole fiber profiling forging forming method of multijaw component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3854517A1 (en) | Novel hollow shaft manufacturing method | |
| US7347075B2 (en) | Methods for the cold extrusion of metallic elements with dead or through holes and plant for carrying out said methods | |
| CN102248381A (en) | Method for processing lathe spindle | |
| EP2763804B1 (en) | A process for making forged and machined components | |
| CN103157758A (en) | Precision forging plastic forming process for inner gear ring in planetary reducer | |
| CN102284670A (en) | Heavy truck balance shaft forging method | |
| CN102556837A (en) | Lifting hook manufactured by adopting large-thickness fine-cutting technology and large-section friction welding method | |
| CN104139280A (en) | Manufacturing process for wheel hubs | |
| RU2220020C1 (en) | Method of manufacture of forgings, predominantly out of metals and alloys of titanium subgroup and forging complex for performing the same | |
| CN103706754A (en) | Precision forging plastic molding process for internal toothed rings of planetary speed reducers | |
| CN107009103A (en) | A kind of production technology of sprocket wheel or ring gear | |
| CN114425590A (en) | Forging method of short sleeve with flange | |
| CN1507963A (en) | Spline shaft processing method using cold extrusion of meidium carbon steel | |
| CN109773095B (en) | Process for forging high-carbon high-alloy cold-work die steel hollow forging | |
| CN114160727A (en) | Forging method for large four-claw lifting hook forge piece | |
| CN107262647A (en) | A kind of method for upsetting of large-scale round steel bar | |
| RU2317170C2 (en) | Method for making deep cylindrical products of square blanks | |
| CN1438081A (en) | Technology for processing spindle nose forged piece of heavy automobile | |
| CN114888231A (en) | Forging process and forging device for roller bearing piece | |
| CN112045124B (en) | Special core rod for cylinder barrel inner hole concave step and forming method | |
| CN110586825B (en) | Free forging method of step inner hole cylinder forging | |
| CN114043166A (en) | Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging | |
| CN106334906A (en) | Automobile part surface processing method | |
| CN110076525A (en) | A kind of production method using cold-heading technology processing and forming high-precision pedal tooth | |
| CN112743017A (en) | Rolling and forging combined production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |