A method of using an iron sheet wrapper to improve the surface quality of pie blanks

Abstract

The present invention relates to an iron sheet sheathing method for improving the surface quality of a cake blank, comprising the following steps: S1, measuring the length h and diameter d of a bar material; S2, making two end face iron sheets, the outer circle of which is evenly distributed with a plurality of petal-shaped support pieces a; S3, making a side face iron sheet, the two sides of which are evenly distributed with a plurality of petal-shaped support pieces b; S4, wrapping the side face iron sheet on the side of the bar material, fixing the overlapping section in the middle of the side face iron sheet by spot welding, and then placing the bar material vertically on the ground, and breaking the petal-shaped support piece b outward; S5, placing the two end face iron sheets at the two ends of the bar material respectively, the petal-shaped support piece a corresponds to the inner measurement of the petal-shaped support piece b, and the petal-shaped support piece a and the petal-shaped support piece b are fixedly connected by spot welding; S6, welding the electric welding part firmly, and completing the sheathing. The resistance of the sheathing to the end face of the cake blank is effectively reduced, the smoothness is maintained, and the quality problem of the annular pit on the end face of the cake blank is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of material forming, and in particular to a method for wrapping a billet blank with an iron sheet to improve the surface quality thereof. Background Art

[0002] During the forming process of superalloy materials, the deformation temperature plays a decisive role in their microstructure and properties. Therefore, in the field of material forming, in order to reduce the heat dissipation of superalloys during the forming process and ensure that the deformation temperature is controllable, an iron sheet wrapping method is usually adopted to ensure its deformation temperature.

[0003] When the superalloy bar is wrapped with an ordinary iron sheet, as Figure 1 and 2 shown, regular rectangular iron sheets are usually used for side wrapping, and then end iron sheets are used to seal the upper and lower ends of the bar. At this time, the upper and lower end iron sheets wrap the side iron sheets. When the wrapped bar is upset into a cake, due to the fixing and restricting effects of the end iron sheet and the side iron sheet, the radial flow of the material near the end face fillet of the cake blank is difficult, and a large amount of iron sheet accumulates here, as Figure 3 shown, forming a deeper annular pit, which further leads to inconsistent machining references during end face machining, inconsistent end face machining removal amounts, and poor height consistency of the cake blank. For individual products, in order to meet the surface quality requirements of ultrasonic flaw detection, machining is carried out at the lowest point of the end face. Therefore, the removal amount of the cake blank is increased, wasting materials and affecting the deformation amount during die forging, and even resulting in product scrapping. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for wrapping a billet blank with an iron sheet to improve the surface quality thereof, effectively reducing the resistance of the wrapping to the end face of the cake blank and maintaining smoothness, thereby solving the quality problem of the annular pit on the end face of the cake blank.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A method for wrapping a billet blank with an iron sheet to improve the surface quality thereof, comprising the following steps:

[0007] S1. Measure the length h and diameter d of the bar;

[0008] S2. Make two end iron sheets, the outer circle of the end iron sheet is evenly distributed with a plurality of petal-shaped support pieces a, the diameter D1 of the end iron sheet = d + (10 - 50) mm, and the diameter D2 of the petal-shaped support piece a = d + (100 - 150) mm;

[0009] S3, make a side iron sheet, with multiple petal-shaped support pieces b evenly distributed on both sides of the side iron sheet, the length of the side iron sheet L = π * D1mm, the length of both ends of the petal-shaped support piece b A = L-(10-50) mm, the width of the side iron sheet B = (0.6-0.8) * A, and the width C of the side iron sheet is the height of the final cake made of the bar material;

[0010] S4, wrap the side iron sheet on the side of the bar, fix the overlapping section in the middle of the side iron sheet by spot welding, then place the bar vertically on the ground, and break the petal-shaped support piece b outwards;

[0011] S5. Place two end iron sheets at the two ends of the bar material, respectively, with the petal-shaped support piece a corresponding to the inner side of the petal-shaped support piece b, and then press the petal-shaped support piece b onto the end of the petal-shaped support piece a, and fix the petal-shaped support piece a and the petal-shaped support piece b to be connected by spot welding;

[0012] S6. Weld the welding parts firmly to complete the sheathing.

[0013] The petal-shaped support pieces b are distributed on both sides of the side iron sheet, and the number of the petal-shaped support pieces b on one side is the same as the number of the petal-shaped support pieces a.

[0014] The number of the petal-shaped branches a is 4-8.

[0015] The petal-shaped support piece b is welded with the petal-shaped support piece a to form a plurality of diamond-shaped holes.

[0016] Slits are formed between the petal-shaped branches b.

[0017] The beneficial effects of the present invention are:

[0018] 1. Through the analysis of the deformation characteristics of the workpiece body material and the sheathed iron sheet during bar upsetting, the sheathed iron sheet is designed with a special shape and the connection method is specially restricted. After the sheathing, multiple diamond holes are formed between the petal-shaped support piece a and the petal-shaped support piece b, so that the material near the rounded corner of the end face of the cake blank has space for radial flow, and a large amount of iron sheet will not accumulate, which effectively reduces the resistance of the sheath to the end face of the cake blank, maintains smoothness, and solves the surface defect problem of pits on the end face of the cake blank after upsetting the high-temperature alloy bar. It can greatly improve the high consistency of the cake blank, reduce the removal amount of the cake blank end face processing, and thus improve the material utilization rate of the product and the stability of the product's organizational performance.

[0019] 2. Ensure that the iron sheet can unfold smoothly during the deformation of the upsetting cake by cutting the seams. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a common iron sheet sheath;

[0021] Figure 2 It is a schematic diagram of ordinary sleeve die forging;

[0022] Figure 3 Schematic diagram of the surface quality of the cake blank prepared by the ordinary iron sheet covering method;

[0023] Figure 4 Schematic diagram of the structure of the bar stock in the present invention;

[0024] Figure 5 Schematic diagram of the structure of the end iron sheet in the present invention;

[0025] Figure 6 Schematic diagram of the structure of the side iron sheet in the present invention;

[0026] Figure 7 Schematic diagram of the welding structure when the side iron sheet covers the bar stock in the present invention;

[0027] Figure 8 Schematic diagram of the structure after the petal-shaped support piece b on the side iron sheet is broken outwards in the present invention;

[0028] Figure 9 Schematic diagram of the structure when installing the end iron sheet in the present invention;

[0029] Figure 10 Schematic diagram of the structure after the side iron sheet and the end iron sheet cover the bar stock in the present invention;

[0030] Figure 11 Picture of the bar stock after being made into the final pier cake in the present invention; Specific embodiments

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] Example 1

[0033] An iron sheet covering method for improving the surface quality of the cake blank, comprising the following steps:

[0034] S1. As Figures 4 to 10 shown, measure the length h and diameter d of the bar stock;

[0035] S2. Make two end iron sheets, the outer circle of the end iron sheet is evenly distributed with a plurality of petal-shaped support pieces a, the diameter D1 of the end iron sheet = d + (10 - 50) mm, and the diameter D2 of the petal-shaped support piece a = d + (100 - 150) mm;

[0036] S3. Make a side iron sheet, the two sides of the side iron sheet are evenly distributed with a plurality of petal-shaped support pieces b, the length L of the side iron sheet = π * D1 mm, the length A at both ends of the petal-shaped support piece b = L - (10 - 50) mm, the width B of the side iron sheet = (0.6 - 0.8) * A, and the width C of the side iron sheet is the height of the bar stock made into the final pier cake;

[0037] S4. Wrap the side iron sheet around the side of the bar stock. Fix the overlapping section in the middle of the side iron sheet by spot welding. Then place the bar stock vertically on the ground and open the petal-shaped support piece b outwards.

[0038] S5. Place the two end iron sheets on the two ends of the bar stock respectively. The petal-shaped support piece a corresponds to the inner side of the petal-shaped support piece b. Then press the petal-shaped support piece b onto the end of the petal-shaped support piece a and fix and connect the petal-shaped support piece a and the petal-shaped support piece b by spot welding.

[0039] S6. Weld the electric welding part firmly to complete the sheath.

[0040] The petal-shaped support piece b is distributed on both sides of the side iron sheet, and the number of one side of the petal-shaped support piece b is the same as the number of the petal-shaped support piece a.

[0041] The number of the petal-shaped support piece a is 4 - 8 pieces.

[0042] After the petal-shaped support piece b and the petal-shaped support piece a are welded, a plurality of diamond-shaped holes are formed.

[0043] There are cut seams formed between the petal-shaped support pieces b.

[0044] Through the analysis of the deformation characteristics of the workpiece body material and the sheath iron sheet during the upsetting of the bar stock, a special shape design is carried out on the sheath iron sheet and special restrictions are imposed on the connection method. A plurality of diamond-shaped holes are formed between the petal-shaped support piece a and the petal-shaped support piece b after sheathing, so that the material near the end face fillet of the cake blank has a radial flow space, and a large amount of iron sheet will not accumulate, effectively reducing the resistance of the sheath to the end face of the cake blank and maintaining smoothness. As Figure 11 shown, it solves the surface defect problem of pits appearing on the end face of the cake blank after upsetting the superalloy bar stock, can greatly improve the height consistency of the cake blank, reduce the removal amount of the end face machining of the cake blank, and further improve the material utilization rate of the product and the stability of the tissue performance of the product.

[0045] By means of the cut seams, it is ensured that the iron sheet can be smoothly unfolded during the upsetting deformation process. The width C of the side iron sheet is the final height of the cake blank deformation. The part exceeding C is easily pressed into the end face of the cake blank. After cutting the seams, it is beneficial for the iron sheet to be smoothly separated during the deformation process.

[0046] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method of using an iron sheet sleeve to improve the surface quality of a cake blank, characterized in that; The following steps are involved: S1. Measure the length h and diameter d of the bar; S2. Two end surface iron sheets are made, wherein the outer circle of the end surface iron sheets is evenly distributed with a plurality of petal-shaped support pieces a, the diameter of the end surface iron sheets D1=d+(10-50) mm, and the diameter of the petal-shaped support pieces a D2=d+(100-150) mm; S3, make a side iron sheet, with multiple petal-shaped support pieces b evenly distributed on both sides of the side iron sheet, the length of the side iron sheet L = π * D1mm, the length of both ends of the petal-shaped support piece b A = L-(10-50) mm, the width of the side iron sheet B = (0.6-0.8) * A, and the width C of the side iron sheet is the height of the final cake made of the bar material; S4, wrap the side iron sheet on the side of the bar, fix the overlapping section in the middle of the side iron sheet by spot welding, then place the bar vertically on the ground, and break the petal-shaped support piece b outwards; S5. Place two end iron sheets at the two ends of the bar material, respectively, with the petal-shaped support piece a corresponding to the inner side of the petal-shaped support piece b, and then press the petal-shaped support piece b onto the end of the petal-shaped support piece a, and fix the petal-shaped support piece a and the petal-shaped support piece b to be connected by spot welding; S6. Weld the welding parts firmly to complete the sheathing.

2. The method of using an iron sheet sleeve to improve the surface quality of a cake blank according to claim 1, characterized in that: The petal-shaped support pieces b are distributed on both sides of the side iron sheet, and the number of the petal-shaped support pieces b on one side is the same as the number of the petal-shaped support pieces a.

3. The method of using an iron sheet sleeve to improve the surface quality of a cake blank according to claim 2, characterized in that: The number of the petal-shaped branches a is 4-8.

4. The method of using an iron sheet sleeve to improve the surface quality of a cake blank according to claim 2, characterized in that: The petal-shaped support piece b is welded with the petal-shaped support piece a to form a plurality of diamond-shaped holes.

5. The method of using an iron sheet sleeve to improve the surface quality of a cake blank according to claim 2, characterized in that: Slits are formed between the petal-shaped branches b.

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