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CN-122007298-A - Forging method of disc forge piece cake blank

CN122007298ACN 122007298 ACN122007298 ACN 122007298ACN-122007298-A

Abstract

The invention relates to a forging method of disc forging cake blanks, which belongs to the technical field of forging and comprises the steps of designing and obtaining cake blanks with positioning holes according to disc forgings and die forging positioning requirements thereof, designing and manufacturing an upper swage with a punch head according to the cake blanks, adapting the punch head to the positioning holes, forging the bar by using an upper flat anvil according to required bar stock obtained by using the cake blank materials, upsetting the bar stock to a specified height, and continuously forging the bar stock with the specified height by using the upper swage instead of the upper flat anvil, so that the bar stock is continuously upsetted to form cake blanks, and pressing the positioning holes on the upper end face of the cake blanks by the punch head in the continuous upsetting process. According to the method, the positioning holes are formed in the end face of the cake blank in the process of upsetting the bar stock to form the cake blank, so that the cake blank obtained by the method does not need to be additionally machined to process the positioning holes, time and labor are saved, less materials are needed during blanking of the bar stock, the material utilization rate can be improved by adopting the method, and the cost of disc forgings is reduced.

Inventors

  • Xiao jijin
  • Lv Xiaogen
  • ZHANG WENXIANG
  • Chang Yueying
  • WANG RUIQI
  • XIONG YUNSEN
  • MO ANJUN
  • DENG HAO
  • Su shilin

Assignees

  • 中国第二重型机械集团德阳万航模锻有限责任公司

Dates

Publication Date
20260512
Application Date
20260310

Claims (8)

  1. 1. A method of forging a disc-like forging cake blank, comprising: step 1, designing and obtaining a cake blank (10) with a positioning hole (11) according to a disc forge piece and a die forging positioning requirement thereof; Step 2, designing and manufacturing an upper swage (30) with a punch (31) according to the biscuit (10), wherein the punch (31) is matched with the positioning hole (11), and then obtaining a required bar stock (40) according to the material consumption of the biscuit (10); step 3, forging the bar (40) by using an upper flat anvil (20) so that the bar (40) is upset to a specified height; And 4, continuously forging the bar stock (40) with the designated height by using the upper swage block (30) instead of the upper flat anvil (20) so as to continuously upsetting the bar stock (40) to form the cake blank (10), wherein in the continuous upsetting process, the punch (31) presses the positioning hole (11) on the upper end surface of the cake blank (10).
  2. 2. The method of forging a disc-like forging cake blank according to claim 1, further comprising, between step 3 and step 4: And 3.5, when the bar (40) is upset to a designated height, replacing the upper flat anvil (20) for forging the bar (40) with the upper swage block (30) by utilizing the rapid anvil replacing function of the press.
  3. 3. The method for forging a disc-like forge cake blank according to claim 2, wherein: the step 3 and the step 4 are completed when the bar stock (40) is in the same fire.
  4. 4. A method of forging a disc-like forging cake blank according to claim 3 further comprising, between steps 3.5 and 4: And 3.6, centering and positioning the bar (40) to a proper position of the press by utilizing a centering and positioning function of the press, so that the center area of the top end face of the bar (40) is aligned with the punch (31) of the upper die anvil (30).
  5. 5. A method of forging a disc-like forging cake blank according to any one of claims 1 to 4, wherein: when the bar (40) is upset to the specified height, the top end diameter of the bar (40) is D, D is more than or equal to 2D, wherein D is the hole bottom diameter of the positioning hole (11); The designated height is a, a is more than or equal to 3H+h, wherein H is the depth of the positioning hole (11), and H is the height of the cake blank (10).
  6. 6. The method for forging a disc-like forged piece cake blank according to claim 5, wherein: the diameter of the hole bottom of the positioning hole (11) is 150-250mm, and the depth of the positioning hole (11) is 15-40mm.
  7. 7. The method for forging a disc-like forge cake blank according to claim 1, wherein: In the step 3, the upsetting speed of the bar (40) is b; in step 4, the upsetting speed of the bar (40) is v, where v < b.
  8. 8. The method for forging a disc-like forge cake blank according to claim 7, wherein: In the step 3, the upsetting speed of the bar (40) is 10-15mm/s; in the step 4, the upsetting speed of the bar (40) is 8-10mm/s.

Description

Forging method of disc forge piece cake blank Technical Field The invention belongs to the technical field of forging, and particularly relates to a forging method of disc forge piece cake blanks. Background The disc die forging generally uses a process method of upsetting cakes and die forging, upsetting heated bar stock into cake blanks, and processing a blind hole as a positioning hole in the right center of the end face of the cake blanks after cooling. During die forging, the die ejector rod and the positioning holes of the cake blank are matched and positioned, the cake blank is placed in the middle of the die, and the cake blank is prevented from shifting in the die forging process, so that the die forging piece is ensured to be uniformly formed. In the above-mentioned process, processing locating hole in cake blank terminal surface positive centre is accomplished through the machine tooling at present, wastes time and energy, and the waste material that forms when processing the locating hole is abandoned in general, causes the material extravagant. For example, the blanking weight of a disc forge piece made of a high-temperature alloy material is 961kg, the blanking specification phi is 350 multiplied by 960mm, the height of a cake blank after upsetting a cake is 260mm, and a positioning hole phi of 200mm and a positioning hole 35mm deep is required to be processed for meeting the positioning requirement during die forging. The material loss of the forging piece caused by processing the positioning hole is about 13.5kg, the forging piece accounts for 1.4% of the blanking weight, and the material loss of a single piece caused by processing the positioning hole is about 4700 yuan. Statistics show that the material loss of the rest disc forgings due to processing of the positioning holes accounts for 1.1-1.8% of the blanking weight, and the working time wasted by procedures such as cake blank cooling, transferring and processing is about 3-5 days. Disclosure of Invention The invention provides a forging method of disc forging cake blanks, wherein the positioning holes can be forged on the end surfaces of the cake blanks in the process of forging and upsetting the bar stock to form the cake blanks, so that the positioning holes are processed without additional machining after the cake blanks are forged and molded, the time and the labor are saved, the production period of the disc forging is shortened, and no waste materials formed by machining the positioning holes are generated, so that fewer bar stock blanking materials are needed. The invention discloses a forging method of disc forge piece cake blanks, which comprises the following steps: step 1, designing and obtaining a cake blank with a positioning hole according to the die forging positioning requirements of disc forgings; Step 2, designing and manufacturing an upper swage with a punch head according to the cake blank, wherein the punch head is matched with the positioning hole, and then obtaining a required bar stock according to the cake blank material; step 3, forging the bar stock by using an upper flat anvil so that the bar stock is upset to a specified height; And 4, continuously forging the bar stock with the designated height by using the upper swage block instead of the upper flat anvil so as to continuously upsetting the bar stock to form the cake blank, wherein the punch presses the positioning hole on the upper end surface of the cake blank in the continuous upsetting process. Further, in order to better implement the present invention, between step 3 and step 4, further includes: and 3.5, when the bar is upset to the designated height, replacing the upper flat anvil for forging the bar with the upper swage anvil by utilizing the rapid anvil replacing function of the press. Further, in order to better implement the present invention, said step 3 and said step 4 are completed while said bars are on the same fire. Further, in order to better implement the present invention, between step 3.5 and step 4, further includes: and 3.6, centering and positioning the bar to a proper position of the press by utilizing a centering and positioning function of the press, so that the center area of the top end face of the bar is aligned with the punch of the upper die anvil. Further, in order to better realize the invention, when the bar is upset to the specified height, the top end diameter of the bar is D, D is more than or equal to 2D, wherein D is the hole bottom diameter of the positioning hole; the designated height is a, a is more than or equal to 3H+h, wherein H is the depth of the positioning hole, and H is the height of the cake blank. Further, in order to better realize the invention, the diameter of the hole bottom of the positioning hole is 150-250mm, and the depth of the positioning hole is 15-40mm. Further, in order to better implement the present invention, in the step 3, the upsetting speed of the bar is b; in step 4, the upsettin