Thick-wall ring rolling product forging method using vertical ring rolling mill

Abstract

According to the thick-wall ring rolling product forging method using the vertical ring rolling mill, through four working procedure operations of first-time blank manufacturing, first-time ring rolling, second-time blank manufacturing and second-time ring rolling, raw materials in the diameter direction are transferred to the height direction for ring rolling according to the principle of a material transferring method, and the thickness of the ring rolling mill is increased; the method is simple, easy to implement and practical, the problem that a vertical ring rolling mill cannot produce thick-wall ring rolling products can be solved, the equipment capacity is improved, and the method is well applied in practice.

Description

Technical Field

[0001] The invention belongs to the technical field of forging rolled ring products, and in particular relates to a forging method for thick-walled rolled ring products using a vertical ring rolling machine. Background Art

[0002] Using a vertical ring rolling machine to roll ring products can greatly improve material utilization and save raw materials. However, the vertical ring rolling machine also has limitations. Due to the structural characteristics of the vertical ring rolling machine's core shaft to positioning, it is only suitable for thin-walled ring rolling products and cannot roll thick-walled ring products. Therefore, it is necessary to design a forging method to easily solve the problem that the vertical ring rolling machine cannot roll thick-walled ring products. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The invention provides a forging method for thick-walled ring rolling products using a vertical ring rolling machine, so as to solve the technical problem that the vertical ring rolling machine cannot roll thick-walled ring rolling products.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes a method for forging a thick-walled ring rolling product using a vertical ring rolling machine, and the method for forging a thick-walled ring rolling product comprises the following steps:

[0007] S1. First batching

[0008] The heated round bar material is upset, and the blank height H1 after upsetting is greater than the finished forging blank height H0, and the blank outer diameter D1 is less than the finished forging blank outer diameter D0; the inner diameter d1 of the blank inner hole after center punching is based on the core shaft of the ring rolling machine, and a gap is left on one side;

[0009] S2. First ring rolling

[0010] Put the blank after the first blank making into the ring rolling machine for ring rolling, ensure that the inner diameter d2 of the inner hole of the blank is expanded to the maximum after the first ring rolling, the inner diameter d0 of the finished forging blank> the inner diameter d2> the inner diameter d1 of the inner hole of the blank after the first blank making, the outer diameter D2 of the blank is naturally formed after the first ring rolling, and the blank height H2 after the first ring rolling = the blank height H1 after the first blank making;

[0011] S3. Second blanking

[0012] The blank after the first ring rolling is upset to ensure that the blank height H3 after upsetting is equal to the finished forging blank height H0, and the inner diameter d3 of the inner hole of the blank after the second blank making and the outer diameter D3 of the blank after the second blank making are naturally formed;

[0013] S4. Second ring rolling

[0014] The blank after the second blanking is placed in the ring rolling machine for ring rolling. The second ring rolling ensures that the inner diameter d0, outer diameter D0 and height H0 of the final finished forging blank are met.

[0015] Furthermore, in step S1, a gap of 5 to 8 mm is left on one side.

[0016] Furthermore, in step S3, the blank after the first ring rolling is placed on a free forging flat anvil for upsetting.

[0017] (III) Beneficial effects

[0018] The present invention proposes a forging method for thick-walled ring rolling products using a vertical ring rolling machine. Through four working steps of the first blanking, the first ring rolling, the second blanking and the second ring rolling, the material transfer principle is used to transfer the raw materials in the diameter direction to the height direction for ring rolling, and then the raw materials in the height direction are transferred to the diameter direction for ring rolling. This method is simple, easy and practical, can solve the problem that the vertical ring rolling machine cannot produce thick-walled ring rolling products, expand the capacity of the equipment, and is well applied in practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the blank size after the first blank making of the present invention;

[0020] Figure 2 This is a schematic diagram of the blank size after the first ring rolling of the present invention;

[0021] Figure 3 This is a schematic diagram of the blank size after the second blank making of the present invention;

[0022] Figure 4 It is a schematic diagram of the dimensions of the blank (final finished forging blank) after the second ring rolling of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0024] This embodiment provides a forging method for thick-walled ring rolling products using a vertical ring rolling machine, and the forging method mainly includes the following steps:

[0025] S1. First batching

[0026] The heated round bar material is upset, such as Figure 1As shown in the figure, the blank height H1 after upsetting is greater than the finished forging blank height H0, and the blank outer diameter D1 is less than the finished forging blank outer diameter D0, ensuring that it can be smoothly placed in the ring rolling machine; the inner diameter d1 of the inner hole of the blank after center punching is based on the core shaft of the ring rolling machine, and a gap of 5 to 8 mm is left on one side to ensure that the blank after the first blank making can be smoothly placed in the core shaft of the vertical ring rolling machine.

[0027] S2. First ring rolling

[0028] Put the blank after the first blank making into the ring rolling machine for ring rolling. Figure 2 As shown, ensure that the inner diameter d2 of the inner hole of the blank is expanded to the maximum after the first ring rolling, that is, the inner diameter d0 of the finished forging blank> the inner diameter d2> the inner diameter d1 of the inner hole of the blank after the first blank making, the outer diameter D2 of the blank is naturally formed after the first ring rolling, and the blank height H2 after the first ring rolling = the blank height H1 after the first blank making.

[0029] S3. Second blanking

[0030] Place the blank after the first ring rolling on the free forging anvil for upsetting. Figure 3 As shown, it is ensured that the blank height H3 after upsetting is equal to the finished forging blank height H0, and the inner diameter d3 of the inner hole of the blank after the second blank making and the outer diameter D3 of the blank after the second blank making are naturally formed.

[0031] S4. Second ring rolling

[0032] The blank after the second blanking is put into the ring rolling machine for ring rolling. Figure 4 As shown, the second ring rolling ensures that the inner diameter d0, outer diameter D0 and height H0 of the final forging blank are met.

[0033] The blank making height of normal ring rolling products is consistent with the height of the final finished blank. When the present invention is making blanks for the first time, the diameter is controlled within a certain range that can be smoothly placed on the ring rolling machine. The center is punched normally to transfer the material in the diameter direction to the height direction. The height dimension is greater than the height of the final finished blank. The center punching diameter is based on the core shaft of the ring rolling machine. A gap of 5 to 8 mm is left on one side to ensure that the blank after blank making can be smoothly placed on the core shaft of the vertical ring rolling machine. When performing the first ring rolling, it is necessary to ensure that the maximum inner hole is reached. After ring rolling, it returns to the blank making equipment for upsetting and thinning, and the height is consistent with the height of the final finished blank. By performing secondary ring rolling, the blank drawing requirements of the final thick-walled ring rolling product are met.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for forging thick-walled ring products using a vertical ring rolling machine, characterized in that: The thick-walled rolled ring product forging method comprises the following steps: S1. First batching The heated round bar material is upset, and the blank height H1 after upsetting is greater than the finished forging blank height H0, and the blank outer diameter D1 is less than the finished forging blank outer diameter D0; the inner diameter d1 of the blank inner hole after center punching is based on the core shaft of the ring rolling machine, and a gap is left on one side; S2. First ring rolling Put the blank after the first blank making into the ring rolling machine for ring rolling, ensure that the inner diameter d2 of the inner hole of the blank is expanded to the maximum after the first ring rolling, the inner diameter d0 of the finished forging blank> the inner diameter d2> the inner diameter d1 of the inner hole of the blank after the first blank making, the outer diameter D2 of the blank is naturally formed after the first ring rolling, and the blank height H2 after the first ring rolling = the blank height H1 after the first blank making; S3. Second blanking The blank after the first ring rolling is upset to ensure that the blank height H3 after upsetting is equal to the finished forging blank height H0, and the inner diameter d3 of the inner hole of the blank after the second blank making and the outer diameter D3 of the blank after the second blank making are naturally formed; S4. Second ring rolling The blank after the second blanking is placed in the ring rolling machine for ring rolling. The second ring rolling ensures that the inner diameter d0, outer diameter D0 and height H0 of the final finished forging blank are met.

2. The method for forging thick-walled ring rolling products using a vertical ring rolling machine as claimed in claim 1, characterized in that: In step S1, a gap of 5 to 8 mm is left on one side.

3. The method for forging thick-walled ring products using a vertical ring rolling machine as claimed in claim 1, characterized in that: In step S3, the blank after the first ring rolling is placed on a free forging flat anvil for upsetting.

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