Mandrel for machining inner profiled groove ring piece and forming method of inner profiled groove ring piece

Abstract

The invention discloses a saddle for machining an inner groove ring piece and a forming method of the inner groove ring piece, and belongs to the field of ring piece forging forming. The saddle comprises a saddle body, the saddle body is provided with a first annular groove and a second annular groove, and the first annular groove and the second annular groove are sequentially formed in the length direction of the saddle body; a first annular boss is formed between the first annular groove and the second annular groove, the first annular boss is used for machining an inner groove of the ring piece, the inner groove is an annular groove with an opening facing the axis of the ring piece, and the side wall, away from the first annular boss, of the first annular groove is in limiting fit with the upper surface of the ring piece; and the side wall, away from the first annular boss, in the second annular groove is in limiting fit with the lower surface of the ring piece, so that the ring piece machining convenience can be improved, and the machining cost can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of ring forging, and in particular relates to a horse lever for processing an inner groove ring and a forming method of the inner groove ring. Background Art

[0002] Usually, when forging annular parts, it is necessary to first use an upsetting process to reduce the height of the blank and increase the cross-section, then use a center punching process to form a center hole in the center of the blank, and then use processes such as reaming and pre-expansion to expand the inner hole to obtain the required annular parts.

[0003] Among them, when the annular component is a special-shaped component with an inner groove, since the inner groove is set on the inner wall of the annular component and the opening is toward the axis of the annular component, it is necessary to use a special-shaped stick and a mold wheel to process the blank on the ring rolling machine. The special-shaped stick is matched with the inner groove in shape, so that when the blank is processed on the ring rolling machine using the special-shaped stick and the mold wheel, the inner groove can be processed on the annular component, thereby forming a special-shaped component with an inner groove. However, when this structure is adopted, since the blank needs to be processed on the ring rolling machine using a special-shaped stick and a mold wheel, the processing of the annular component is inconvenient and the processing cost is high. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a horse lever for processing an inner groove ring and a forming method of the inner groove ring. The technical problem to be solved by the present invention is achieved by the following technical solutions:

[0005] In the first aspect, the present invention provides a horse lever for processing an inner groove ring, comprising a horse lever body, a first annular groove and a second annular groove being provided on the horse lever body, the first annular groove and the second annular groove being arranged in sequence along the length direction of the horse lever body, a first annular boss being formed between the first annular groove and the second annular groove, the first annular boss being used for processing the inner groove of the ring, the inner groove being an annular groove with an opening toward the axis of the ring, the side wall of the first annular groove away from the first annular boss and the upper surface of the ring being limitedly matched, and the side wall of the second annular groove away from the first annular boss and the lower surface of the ring being limitedly matched.

[0006] In a second aspect, the present invention provides a method for forming an inner groove ring, using a lever for processing an inner groove ring provided by the above scheme, comprising:

[0007] Step 1: Select a blank and design a forging drawing according to the outer contour of the ring to be processed, the ring to be processed has an inner groove, and the inner groove is an annular groove with an opening toward the axis of the ring;

[0008] Step 2: Calculate the dimensions of the first annular groove, the second annular groove, and the first annular boss in the mandrel according to the dimensions of the ring workpiece to be processed, and machine the mandrel according to the dimensions of the first annular groove, the second annular groove, and the first annular boss in the mandrel;

[0009] Step 3: Upset the blank to obtain an upset blank;

[0010] Step 4: Perform center punching on the upset blank to obtain a punched blank;

[0011] Step 5: Perform horse-frame reaming on the punched blank to obtain a rough-shaped blank;

[0012] Step 6: Perform pre-reaming on the rough-shaped blank to obtain a preformed blank;

[0013] Step 7: Use a special mandrel to perform reaming on the preformed blank to obtain a ring workpiece with an inner groove;

[0014] Step 8: Inspect whether the dimensions of the ring workpiece meet the forging requirements through sandblasting and grinding;

[0015] Step 9: Perform heat treatment on the ring workpiece;

[0016] Step 10: Perform physical and chemical testing on the ring workpiece to obtain a finished ring workpiece.

[0017] In an embodiment of the present invention, calculating the dimensions of the first annular groove, the second annular groove, and the first annular boss in the mandrel according to the dimensions of the ring workpiece to be processed, and machining the mandrel according to the dimensions of the first annular groove, the second annular groove, and the first annular boss in the mandrel specifically includes:

[0018] Based on the first correspondence relationship, calculate the length L of the working part of the mandrel according to the height H of the ring workpiece to be processed;

[0019] Among them, the first correspondence relationship is:

[0020] When H≥30mm, L = H + 1mm; when 30mm < H≤40mm, L = H + 1.5mm; when 40mm < H≤50mm, L = H + 2mm; when 50mm < H≤60mm, L = H + 2.5mm; when H>60mm, L = H + 3mm;

[0021] Among them, the working part is composed of the first annular groove, the second annular groove, and the first annular boss.

[0022] In an embodiment of the present invention, after the step of calculating the length L of the working part of the mandrel based on the first correspondence relationship according to the height H of the ring workpiece to be processed, it further includes:

[0023] Based on the width B of the inner groove in the ring workpiece to be processed, calculate the thickness N of the first annular boss according to the second corresponding relationship;

[0024] Among them, the second corresponding relationship is:

[0025] When B≥40mm, N = B - 1.5mm; when 40mm < B ≤ 50mm, N = B - 2mm; when 50mm < B ≤ 60mm, N = B - 2.5mm; when B > 60mm, N = B - 3mm.

[0026] In an embodiment of the present invention, after the step of calculating the thickness N of the first annular boss based on the width B of the inner groove in the ring workpiece to be processed according to the second corresponding relationship, it further includes:

[0027] Based on the depth E of the inner groove in the ring workpiece to be processed, calculate the protruding height K of the first annular boss according to the third corresponding relationship;

[0028] Among them, the third corresponding relationship is:

[0029] When E≥30mm, K = E - 1mm; when 30mm < E ≤ 40mm, K = E - 1.5mm; when 40mm < E ≤ 50mm, K = E - 2mm; when E > 50mm, K = E - 2.5mm.

[0030] In an embodiment of the present invention, after the step of calculating the protruding height K of the first annular boss based on the depth E of the inner groove in the ring workpiece to be processed according to the third corresponding relationship, it further includes:

[0031] Based on the first ring transition fillet R1 of the inner groove in the ring workpiece to be processed, calculate the first bar transition fillet r1 between the first annular groove and the second annular groove according to the fourth corresponding relationship;

[0032] Among them, the fourth corresponding relationship is:

[0033] When R1≥5mm, r1 = R1 - 1mm; when 5mm < R1 ≤ 8mm, r1 = R1 - 1.5mm; when 8mm < R1 ≤ 10mm, r1 = R1 - 2mm; when R1 > 10mm, r1 = R1 - 2.5mm;

[0034] Among them, the first ring transition fillet R1 is the transition angle between the groove wall of the inner groove and the inner wall of the ring, and the first bar transition fillet r1 is the transition angle between the groove wall and the groove bottom of the first annular groove and is also the transition angle between the groove wall and the groove bottom of the second annular groove.

[0035] In one embodiment of the present invention, after the step of calculating the first horse bar transition fillet r1 of the first annular groove and the second annular groove based on the fourth corresponding relationship according to the first ring part transition fillet R1 of the inner groove in the ring part to be processed, the following steps are further included:

[0036] According to the second ring part transition fillet R2 of the inner groove in the ring part to be processed, based on the fifth corresponding relationship, calculate the second horse bar transition fillet r2 of the first annular groove and the second annular groove;

[0037] Among them, the fifth corresponding relationship is:

[0038] When R2≥5mm, r2 = R2 + 0.5mm; when 5mm < R2 ≤ 8mm, r2 = R2 + 1mm; when 8mm < R2 ≤ 10mm, r2 = R2 + 1.5mm; when R2 > 10mm, r2 = R2 + 2mm;

[0039] Among them, the second ring part transition fillet R2 is the transition angle between the groove wall and the groove bottom of the inner groove, and the second horse bar transition fillet r2 is the transition angle between the groove wall of the first annular groove and the convex surface of the first annular boss, and is also the transition angle between the groove wall of the second annular groove and the convex surface of the first annular boss.

[0040] In one embodiment of the present invention, the punching blank is subjected to horse frame hole expanding treatment to obtain a rough blank, which specifically includes:

[0041] Based on (35 - 50)°C × 75min, after heating the blank circuit to below the phase change point, the punching blank is subjected to horse frame hole expanding treatment to obtain a rough blank.

[0042] In one embodiment of the present invention, the rough blank is subjected to pre - hole expanding treatment to obtain a pre - formed blank, which specifically includes:

[0043] Based on (35 - 50)°C × 75min, after heating the rough blank to below the phase change point, the rough blank is subjected to pre - hole expanding treatment to obtain a pre - formed blank.

[0044] In one embodiment of the present invention, a horse bar is used to expand the hole of the pre - formed blank to obtain a ring part with an inner groove, which specifically includes:

[0045] Based on (35 - 50)°C × 75min, a horse bar is used to expand the hole of the pre - formed blank to obtain a ring part with an inner groove.

[0046] Compared with the prior art, the beneficial effects of the present invention:

[0047] In the above scheme of the present application, the horse lever includes a horse lever body, and the horse lever body is provided with a first annular groove and a second annular groove, and the first annular groove and the second annular groove are sequentially arranged along the length direction of the horse lever body, and a first annular boss is formed between the first annular groove and the second annular groove, and the first annular boss is used to process the inner groove of the ring, and the inner groove is an annular groove with an opening toward the axis of the ring. With this structure, firstly, since the first annular boss is located between the first annular groove and the second annular groove and protrudes relative to the groove bottom of the first annular groove and the second annular groove, when the above horse lever is used to process the ring, the inner wall of the ring can be squeezed by the first annular boss of the horse lever to process the inner groove of the ring by expanding the hole. The above horse lever of the present application has a simple structure, and when processing the inner groove ring, there is no need to use a special mold stick, a mold wheel and a ring rolling machine for processing, so that the processing of the ring is more convenient and the processing cost is lower.

[0048] Secondly, when the side wall of the first annular groove away from the first annular boss and the upper surface of the ring are limited in cooperation, and the side wall of the second annular groove away from the first annular boss and the lower surface of the ring are limited in cooperation, the first annular groove and the second annular groove can be used to limit the horse bar, thereby improving the stability during horse bar processing.

[0049] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic diagram of a horse bar provided by an embodiment of the present invention;

[0051] Figure 2 is a schematic diagram of a ring member provided by an embodiment of the present invention;

[0052] Figure 3 is a schematic diagram of a forming method of an inner groove ring provided in an embodiment of the present invention;

[0053] Figure 4 is a cross-sectional view of a ring member in an embodiment of the present invention;

[0054] Figure 5 It is a cross-sectional view of a horse handle in an embodiment of the present invention.

[0055] Figure numerals: 1- horse lever body, 2- first annular groove, 3- second annular groove, 4- first annular boss, 5- ring part, 6- inner groove. DETAILED DESCRIPTION

[0056] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0057] Embodiment 1:

[0058] See also Figure 1 and Figure 2 Embodiment 1 of the present invention provides a horse lever for processing an inner groove ring, including a horse lever body 1, on which a first annular groove 2 and a second annular groove 3 are provided, the first annular groove 2 and the second annular groove 3 are arranged in sequence along the length direction of the horse lever body 1, a first annular groove 2 and a second annular groove 3 are formed between the first annular groove 2 and the second annular groove 3, the first annular boss 4 is used for processing an inner groove 6 of a ring 5, the inner groove 6 is an annular groove with an opening toward the axis of the ring 5, the side wall of the first annular groove 2 away from the first annular boss 4 and the upper surface of the ring 5 are limitedly matched, and the side wall of the second annular groove 3 away from the first annular boss 4 and the lower surface of the ring 5 are limitedly matched.

[0059] In some embodiments of the present application, the horse lever is a cylindrical structure, and the first annular groove 2, the second annular groove 3, the first annular boss 4 and the axis of the cylindrical structure are collinear, the opening of the first annular groove 2 faces the side away from the axis of the cylindrical structure, the opening of the second annular groove 3 faces the side away from the axis of the cylindrical structure, and the first annular boss 4 is convexly arranged toward the side away from the axis of the cylindrical structure.

[0060] In some embodiments of the present application, the first annular groove 2 and the second annular groove 3 are equal in size.

[0061] In some embodiments of the present application, the first annular groove 2 is composed of two groove walls and a groove bottom, the second annular groove 3 is composed of two groove walls and a groove bottom, the first annular boss 4 is composed of two surfaces and a convex surface, the two surfaces of the first annular boss 4 are respectively the two groove walls of the first annular groove 2 and the second annular groove 3, and the convex surface of the first annular boss 4 and the outer peripheral surface of the cylindrical structure are located on the same surface.

[0062] In the above scheme of the present application, the horse lever comprises a horse lever body 1, on which a first annular groove 2 and a second annular groove 3 are provided, the first annular groove 2 and the second annular groove 3 are arranged in sequence along the length direction of the horse lever body 1, a first annular boss 4 is formed between the first annular groove 2 and the second annular groove 3, the first annular boss 4 is used to process the inner groove 6 of the ring 5, and the inner groove 6 is an annular groove with an opening facing the axis of the ring 5. With this structure, firstly, since the first annular boss 4 is located between the first annular groove 2 and the second annular groove 3 and protrudes relative to the groove bottom of the first annular groove 2 and the second annular groove 3, when the above horse lever is used to process the ring 5, the first annular boss 4 of the horse lever can be used to squeeze the inner wall of the ring 5 by expanding the hole to process the inner groove 6 of the ring. The above horse lever of the present application has a simple structure, and when processing the inner groove ring, it is not necessary to use a special mold stick, a mold wheel and a ring rolling machine for processing, so that the processing of the ring is more convenient and the processing cost is lower.

[0063] Secondly, when the side wall of the first annular groove 2 away from the first annular boss 4 and the upper surface of the ring member are limited in cooperation, and the side wall of the second annular groove 3 away from the first annular boss 4 and the lower surface of the ring member 5 are limited in cooperation, the first annular groove 2 and the second annular groove 3 can be used to limit the horse bar, thereby improving the stability during the horse bar processing.

[0064] Embodiment 2:

[0065] See also Figure 3 The second embodiment of the present invention provides a method for forming an inner groove ring, using the horse bar for processing the inner groove ring provided in the first embodiment, comprising:

[0066] S1: Select a blank and design a forging drawing according to the outer contour of the ring to be processed, the ring to be processed has an inner groove, and the inner groove is an annular groove with an opening toward the axis of the ring;

[0067] S2: calculating the sizes of the first annular groove, the second annular groove and the first annular boss in the horse bar according to the size of the ring to be processed, and processing the horse bar according to the sizes of the first annular groove, the second annular groove and the first annular boss in the horse bar;

[0068] S3: performing upsetting treatment on the blank to obtain an upsetting blank;

[0069] S4: performing center punching processing on the upset blank to obtain a punched blank;

[0070] S5: performing a rack expansion process on the punching blank to obtain a rough blank;

[0071] S6: performing pre-hole expansion processing on the rough blank to obtain a preformed blank;

[0072] S7: using a special lever to expand the preform blank to obtain a ring with an inner groove;

[0073] S8: Check whether the size of the ring meets the forging requirements by sand blasting and grinding;

[0074] S9: heat treating the ring;

[0075] S10: Perform physical and chemical tests on the ring to obtain a finished ring.

[0076] The beneficial effects of the second embodiment of the present invention and its various implementations can refer to the beneficial effects analysis of the first embodiment and its various implementations. In addition, the above method can be used to process the blank into an inner groove ring, and the processing efficiency and the finished quality of the ring can be improved.

[0077] In some embodiments of the present application, the material of the blank is TC4, the specification is Φ203mm×235mm, the weight is 43.1kg, and the category is II.

[0078] In some embodiments of the present application, a blank with a specification of Φ203mm×235mm±1 is upset to obtain an upset blank with dimensions of Φ235mm±5×127mm±2.

[0079] In some embodiments of the present application, the upset blank is subjected to center punching to obtain a punched blank with dimensions of Φ325mm×Φ120mm×127mm, where the diameter of the center hole is 120mm.

[0080] In some embodiments of the present application, the punched blank is subjected to sizing expansion using a sizing die to obtain a rough-shaped blank with dimensions of Φ350mm×Φ160mm×117mm.

[0081] In some embodiments of the present application, the rough-shaped blank is subjected to pre-expansion to obtain a preformed blank with dimensions of Φ435mm×Φ300mm×117mm.

[0082] In some embodiments of the present application, physical and chemical inspection refers to a series of physical and chemical property inspections of forgings to ensure their quality and applicability, including force hardness testing, tensile testing, impact testing, fatigue testing, etc.

[0083] In some embodiments of the present application, as Figure 4 and Figure 5 shown, according to the dimensions of the ring workpiece to be processed, the dimensions of the first annular groove, the second annular groove, and the first annular boss in the sizing die are calculated, and the sizing die is machined according to the dimensions of the first annular groove, the second annular groove, and the first annular boss in the sizing die. Specifically, it includes:

[0084] According to the height H of the ring workpiece to be processed, based on the first corresponding relationship, the length L of the working part of the sizing die is calculated;

[0085] Among them, the first corresponding relationship is:

[0086] When H≥30mm, L = H + 1mm; when 30mm < H ≤ 40mm, L = H + 1.5mm; when 40mm < H ≤ 50mm, L = H + 2mm; when 50mm < H ≤ 60mm, L = H + 2.5mm; when H > 60mm, L = H + 3mm;

[0087] Among them, the working part is composed of the first annular groove, the second annular groove, and the first annular boss. By using this method, the length of the working part of the sizing die can be determined based on different height values of the ring workpiece to be processed, thereby improving the forming accuracy of the sizing die and further improving the finished product quality of the finished ring workpiece.

[0088] In some embodiments of the present application, H is 120 mm and L is 120 + 3 = 123 mm.

[0089] In some embodiments of the present application, such as Figure 4 and Figure 5 shown, after the step of calculating the length L of the working part of the mandrel based on the first corresponding relationship according to the height H of the ring workpiece to be processed, it further includes:

[0090] Calculating the thickness N of the first annular boss based on the second corresponding relationship according to the width B of the inner groove in the ring workpiece to be processed;

[0091] Wherein, the second corresponding relationship is:

[0092] When B ≥ 40 mm, N = B - 1.5 mm; when 40 mm < B ≤ 50 mm, N = B - 2 mm; when 50 mm < B ≤ 60 mm, N = B - 2.5 mm; when B > 60 mm, N = B - 3 mm. By adopting this method, the thickness of the first annular boss can be determined based on different width values of the inner groove in the ring workpiece to be processed, thereby improving the forming accuracy of the mandrel and further improving the finished product quality of the finished ring workpiece.

[0093] In some embodiments of the present application, B is 120 - 26 - 26 = 68 mm and N is 68 - 3 = 65 mm.

[0094] In some embodiments of the present application, such as Figure 4 and Figure 5 shown, after the step of calculating the thickness N of the first annular boss based on the second corresponding relationship according to the width B of the inner groove in the ring workpiece to be processed, it further includes:

[0095] Calculating the protruding height K of the first annular boss based on the third corresponding relationship according to the depth E of the inner groove in the ring workpiece to be processed;

[0096] Wherein, the third corresponding relationship is:

[0097] When E ≥ 30 mm, K = E - 1 mm; when 30 mm < E ≤ 40 mm, K = E - 1.5 mm; when 40 mm < E ≤ 50 mm, K = E - 2 mm; when E > 50 mm, K = E - 2.5 mm. By adopting this method, the protruding height of the first annular boss can be determined based on different depth values of the inner groove in the ring workpiece to be processed, thereby improving the forming accuracy of the mandrel and further improving the finished product quality of the finished ring workpiece.

[0098] In some embodiments of the present application, E is (510 - 470) / 2 = 20 mm and K is 20 - 2.5 = 17.5 mm.

[0099] In some embodiments of the present application, such as Figure 4 and Figure 5 As shown in Figure 5 , after the step of calculating the protruding height K of the first annular boss based on the third correspondence according to the depth E of the inner groove in the ring workpiece to be processed, the method further includes:

[0100] Calculating a first bar transition fillet r1 of the first annular groove and the second annular groove based on a fourth correspondence according to a first ring transition fillet R1 of an inner groove in the ring workpiece to be processed;

[0101] Wherein, the fourth correspondence is:

[0102] When R1≥5mm, r1 = R1 - 1mm; when 5mm < R1≤8mm, r1 = R1 - 1.5mm; when 8mm < R1≤10mm, r1 = R1 - 2mm; when R1>10mm, r1 = R1 - 2.5mm;

[0103] Wherein, the first ring transition fillet R1 is a transition angle between the groove wall of the inner groove and the inner wall of the ring workpiece, and the first bar transition fillet r1 is a transition angle between the groove wall and the groove bottom of the first annular groove and is also a transition angle between the groove wall and the groove bottom of the second annular groove. With this structure, the angle value of the first bar transition fillet of the first annular groove and the second annular groove can be determined based on the angle values of different first ring transition fillets of the inner groove in the ring workpiece to be processed, thereby improving the forming accuracy of the bar and further improving the finished product quality of the finished ring workpiece.

[0104] In some embodiments of the present application, R1 is 5mm and r1 is 1.5mm.

[0105] In some embodiments of the present application, as Figure 4 and Figure 5 shown, after the step of calculating the first bar transition fillet r1 of the first annular groove and the second annular groove based on the fourth correspondence according to the first ring transition fillet R1 of the inner groove in the ring workpiece to be processed, the method further includes:

[0106] Calculating a second bar transition fillet r2 of the first annular groove and the second annular groove based on a fifth correspondence according to a second ring transition fillet R2 of the inner groove in the ring workpiece to be processed;

[0107] Wherein, the fifth correspondence is:

[0108] When R2≥5mm, r2 = R2 + 0.5mm; when 5mm < R2≤8mm, r2 = R2 + 1mm; when 8mm < R2≤10mm, r2 = R2 + 1.5mm; when R2>10mm, r2 = R2 + 2mm;

[0109] Among them, the second ring transition fillet R2 is the transition angle between the groove wall and the groove bottom of the inner groove, and the second lever transition fillet r2 is the transition angle between the groove wall of the first annular groove and the convex surface of the first annular boss, and is the transition angle between the groove wall of the second annular groove and the convex surface of the first annular boss. With this structure, the angle values ​​of the second lever transition fillets of the first annular groove and the second annular groove can be determined based on the angle values ​​of the different second ring transition fillets of the inner groove in the ring to be processed, thereby improving the forming accuracy of the lever, and then improving the finished product quality of the finished ring.

[0110] In some embodiments of the present application, R2 is 5 mm and r2 is 6 mm.

[0111] In some embodiments of the present application, the punching blank is subjected to a rack expansion process to obtain a rough blank, which specifically includes:

[0112] Based on (35-50)℃×75min, after the blank circuit is heated to the phase transition point, the punching blank is subjected to a rack expansion process to obtain a rough blank. Using this method, the blank can be heated to the phase transition point by heating at a temperature of (35-50)℃ for 75min, thereby facilitating the rack expansion process of the punching blank and improving the forming quality of the rough blank.

[0113] In some embodiments of the present application, a pre-expansion process is performed on a rough blank to obtain a preformed blank, which specifically includes:

[0114] Based on (35-50)℃×75min, after the rough blank is heated to the phase change point, the rough blank is pre-expanded to obtain a preformed blank. By adopting this method, the rough blank can be heated to the phase change point by heating at a temperature of (35-50)℃ for 75min, thereby facilitating the pre-expanding of the rough blank and improving the forming quality of the preformed blank.

[0115] In some embodiments of the present application, a preform blank is expanded by using a horse bar to obtain a ring with an inner groove, which specifically includes:

[0116] Based on (35-50)℃×75min, the preform blank is expanded by a horse bar to obtain a ring with an inner groove. By using this method, the preform blank can be heated to below the phase change point by heating at a temperature of (35-50)℃ for 75min, thereby facilitating the expansion of the preform blank to obtain a ring with an inner groove and improving the molding quality of the ring.

[0117] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0118] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0119] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0120] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A horse bar for processing inner groove ring parts, characterized in that: It includes a mandrel body, on which a first annular groove and a second annular groove are provided. The first annular groove and the second annular groove are arranged in sequence along the length direction of the mandrel body. A first annular boss is formed between the first annular groove and the second annular groove. The first annular boss is used for machining the inner groove of the ring. The inner groove is an annular groove with an opening facing the axis of the ring. The side wall of the first annular groove away from the first annular boss is in limit fit with the upper surface of the ring, and the side wall of the second annular groove away from the first annular boss is in limit fit with the lower surface of the ring.

2. A method for forming an inner groove ring, characterized in that: The mandrel for machining the inner groove ring as described in claim 1 includes: Step 1: Select a blank according to the outer contour of the ring to be machined and design a forging drawing. The ring to be machined has an inner groove, and the inner groove is an annular groove with an opening facing the axis of the ring; Step 2: Calculate the dimensions of the first annular groove, the second annular groove and the first annular boss in the mandrel according to the dimensions of the ring to be machined, and machine the mandrel according to the dimensions of the first annular groove, the second annular groove and the first annular boss in the mandrel; Step 3: Upset the blank to obtain an upset blank; Step 4: Perform center punching on the upset blank to obtain a punched blank; Step 5: Perform horse-frame reaming on the punched blank to obtain a rough-shaped blank; Step 6: Perform pre-reaming on the rough-shaped blank to obtain a preformed blank; Step 7: Use the mandrel to perform reaming on the preformed blank to obtain a ring with an inner groove; Step 8: Inspect whether the dimensions of the ring meet the forging requirements through sandblasting and grinding; Step 9: Perform heat treatment on the ring; Step 10: Perform physical and chemical testing on the ring to obtain a finished ring.

3. The method for forming an inner groove ring according to claim 2, characterized in that: The step of calculating the dimensions of the first annular groove, the second annular groove and the first annular boss in the mandrel according to the dimensions of the ring to be machined, and machining the mandrel according to the dimensions of the first annular groove, the second annular groove and the first annular boss in the mandrel specifically includes: Based on a first corresponding relationship, calculate the length L of the working part of the mandrel according to the height H of the ring to be machined; Among them, the first corresponding relationship is: When H≥30mm, L = H + 1mm; when 30mm < H≤40mm, L = H + 1.5mm; when 40mm < H≤50mm, L = H + 2mm; when 50mm < H≤60mm, L = H + 2.5mm; when H>60mm, L = H + 3mm; Among them, the working part is composed of the first annular groove, the second annular groove and the first annular boss.

4. The method for forming an inner groove ring according to claim 3, characterized in that: After the step of calculating the length L of the working part of the mandrel according to the height H of the ring to be machined based on the first corresponding relationship, it further includes: Based on a second corresponding relationship, calculate the thickness N of the first annular boss according to the width B of the inner groove in the ring to be machined; Among them, the second corresponding relationship is: When B ≥ 40 mm, N = B - 1.5 mm; when 40 mm < B ≤ 50 mm, N = B - 2 mm; when 50 mm < B ≤ 60 mm, N = B - 2.5 mm; when B > 60 mm, N = B - 3 mm.

5. The method for forming an inner groove ring according to claim 4, characterized in that: After the step of calculating the thickness N of the first annular boss based on the second corresponding relationship according to the width B of the inner groove in the workpiece ring to be processed, the method further includes: Calculating the protruding height K of the first annular boss based on the third corresponding relationship according to the depth E of the inner groove in the workpiece ring to be processed; Wherein, the third corresponding relationship is: When E ≥ 30 mm, K = E - 1 mm; when 30 mm < E ≤ 40 mm, K = E - 1.5 mm; when 40 mm < E ≤ 50 mm, K = E - 2 mm; when E > 50 mm, K = E - 2.5 mm.

6. The method for forming an inner groove ring according to claim 5, characterized in that: After the step of calculating the protruding height K of the first annular boss based on the third corresponding relationship according to the depth E of the inner groove in the workpiece ring to be processed, the method further includes: Calculating the first bar transition fillet r1 of the first annular groove and the second annular groove based on the fourth corresponding relationship according to the first ring transition fillet R1 of the inner groove in the workpiece ring to be processed; Wherein, the fourth corresponding relationship is: When R1 ≥ 5 mm, r1 = R1 - 1 mm; when 5 mm < R1 ≤ 8 mm, r1 = R1 - 1.5 mm; when 8 mm < R1 ≤ 10 mm, r1 = R1 - 2 mm; when R1 > 10 mm, r1 = R1 - 2.5 mm; Wherein, the first ring transition fillet R1 is the transition angle between the groove wall of the inner groove and the inner wall of the ring, and the first bar transition fillet r1 is the transition angle between the groove wall and the groove bottom of the first annular groove and is also the transition angle between the groove wall and the groove bottom of the second annular groove.

7. The method for forming an inner groove ring according to claim 6, characterized in that: After the step of calculating the first bar transition fillet r1 of the first annular groove and the second annular groove based on the fourth corresponding relationship according to the first ring transition fillet R1 of the inner groove in the workpiece ring to be processed, the method further includes: Calculating the second bar transition fillet r2 of the first annular groove and the second annular groove based on the fifth corresponding relationship according to the second ring transition fillet R2 of the inner groove in the workpiece ring to be processed; Wherein, the fifth corresponding relationship is: When R2 ≥ 5 mm, r2 = R2 + 0.5 mm; when 5 mm < R2 ≤ 8 mm, r2 = R2 + 1 mm; when 8 mm < R2 ≤ 10 mm, r2 = R2 + 1.5 mm; when R2 > 10 mm, r2 = R2 + 2 mm; Wherein, the second ring transition fillet R2 is the transition angle between the groove wall and the groove bottom of the inner groove, and the second bar transition fillet r2 is the transition angle between the groove wall of the first annular groove and the protruding surface of the first annular boss and is also the transition angle between the groove wall of the second annular groove and the protruding surface of the first annular boss.

8. The method for forming an inner groove ring according to claim 2, characterized in that: The step of performing a horse-frame expanding process on the punched blank to obtain a rough blank specifically includes: Based on (35-50)°C×75min, after the blank circuit is heated to the phase transition point, the punching blank is subjected to a rack expansion process to obtain a rough blank.

9. The method for forming an inner groove ring according to claim 8, characterized in that: The method of performing pre-expansion processing on the rough blank to obtain the preformed blank specifically includes: Based on (35-50)°C×75min, after the rough blank is heated to the phase transition point, the rough blank is subjected to a pre-expansion treatment to obtain a preformed blank.

10. The method for forming an inner groove ring according to claim 2 or 9, characterized in that: The method of using the lever to expand the preform blank to obtain a ring with an inner groove specifically includes: Based on (35-50)°C×75min, the preformed blank is expanded with the horse bar to obtain a ring with an inner groove.

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