A processing tooling and processing method for thin-walled ring parts

Abstract

The present invention provides a thin-walled ring processing tool. It includes a base, a plurality of support seats and a clamping mechanism; the support seats and the clamping mechanism are movably connected to the base, and the plurality of support seats and the plurality of clamping mechanisms are arranged at intervals along the circumference of the base; the clamping mechanism includes a height adjustment component and a pressing plate arranged on the height adjustment component, and the pressing plate is provided with a radial clamping portion and an axial clamping portion, which are respectively used to clamp the thin-walled ring in the radial or axial direction. The present invention also provides a thin-walled ring processing method, including forging a blank into a ring blank, quenching and tempering the ring blank after grooving, and then dividing the ring blank into two blanks, and using one of the blanks to prepare a thin-walled ring. The present invention controls the deformation of the thin-walled ring during the processing process by installing the blank of the thin-walled ring on the processing tool, which is beneficial to improving the processing accuracy of the thin-walled ring.

Description

Technical Field

[0001] The present invention relates to the technical field of part processing, and particularly relates to a processing tooling and a processing method for thin-walled ring parts. Background Art

[0002] The main bearing of a roadheader belongs to a low-speed and heavy-duty bearing, which is the core component that bears the load under harsh working conditions such as rock excavation by the roadheader, and has high load-bearing capacity requirements. As an embedded raceway of the main bearing of the roadheader, the floating ring needs to cope with huge impacts during operation, and has high requirements for the mechanical properties of the floating ring. The floating ring belongs to a thin-walled ring part with a large diameter and a small wall thickness, and is prone to deformation, cracking and uneven structure during single forging, which restricts the product performance of the floating ring.

[0003] Moreover, most of the traditional forging processes for ring-shaped blanks adopt the axial split-die forging method. Although the process is simple, the waste of raw materials is relatively large, and only one workpiece can be forged at a time, resulting in low production efficiency.

[0004] In summary, there is an urgent need for a processing tooling and a processing method for thin-walled ring parts to solve the problems existing in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a processing tooling and a processing method for thin-walled ring parts to solve the problem of controlling the deformation amount of thin-walled ring parts.

[0006] To achieve the above purpose, the present invention provides a processing tooling for thin-walled ring parts, including a base, a plurality of support seats and a pressing mechanism; the support seats and the pressing mechanism are both movably connected to the base, and the plurality of support seats and the plurality of pressing mechanisms are arranged at intervals along the circumference of the base; the pressing mechanism includes a height adjustment component and a pressing plate arranged on the height adjustment component, and the pressing plate is provided with a radial pressing part and an axial pressing part, which are respectively used for pressing the thin-walled ring part radially or axially.

[0007] Preferably, the pressing plate is a Z-shaped structural part; the radial pressing part is located inside the right angle of the Z-shaped structural part, and the axial pressing part is located at the bottom of the Z-shaped structural part.

[0008] Preferably, the pressing plate is rotatably connected to the height adjustment component.

[0009] Preferably, the pressing mechanism further includes a mounting seat and a pressing screw; the height adjustment component is arranged on the mounting seat; the pressing screw penetrates through the pressing plate and is threadedly connected to the mounting seat.

[0010] Preferably, the support seats and the pressing mechanism are both slidably connected to the base, and a plurality of slide rails are arranged on the base along its radial direction.

[0011] The present invention also provides a method for machining a thin-walled ring part, comprising the following steps:

[0012] Step A: Forging the blank material to form a ring blank;

[0013] Step B: Rough turning the inner and outer rings of the ring blank, and machining a radial annular groove in the inner ring of the ring blank;

[0014] Step C: Performing quenching and tempering treatment on the ring blank;

[0015] Step D: Cutting the ring blank after quenching and tempering treatment into a first blank and a second blank from the radial annular groove;

[0016] Step E: Separately machining the first blank and the second blank, including machining one of the first blank or the second blank into a thin-walled ring part on a thin-walled ring part machining tooling.

[0017] Preferably, in the step B, after rough turning, machining allowances are reserved on the inner ring of the ring blank, the outer ring of the ring blank and the axial direction of the ring blank; the minimum distance between the radial annular groove and the end face of the ring blank is 8-10 mm larger than the thickness of the thin-walled ring part.

[0018] Preferably, in the step E, the second blank is arranged on the thin-walled ring part machining tooling, the radial pressing part of the pressing plate is abutted against the outer ring of the second blank, and the upper and lower surfaces of the second blank are turned.

[0019] Preferably, in the step E, a plurality of pressing mechanisms are uniformly arranged along the outer ring of the second blank, the axial pressing part of the pressing plate is abutted against the upper surface of the second blank, and the inner ring of the second blank is turned;

[0020] A plurality of pressing mechanisms are uniformly arranged along the inner ring of the second blank, the axial pressing part of the pressing plate is abutted against the upper surface of the second blank, and the outer ring of the second blank is turned.

[0021] Preferably, in the step E, after grinding the end face of the thin-walled ring part, the thin-walled ring part is quenched.

[0022] Applying the technical solution of the present invention has the following beneficial effects:

[0023] (1) In the present invention, by arranging a support seat and a pressing mechanism movably connected to the base on the thin-walled ring part machining tooling, the support and fixation of thin-walled ring parts of different specifications can be adapted, and the deformation amount during the machining of the thin-walled ring part is facilitated to be controlled; the pressing mechanism includes a height adjustment component and a pressing plate, and the pressing plate is provided with a radial pressing part and an axial pressing part, and various pressing methods can be realized for the thin-walled ring part, which is convenient for matching various machining processes.

[0024] (2) In the present invention, the pressing plate is a Z-shaped structural member, and the radial pressing and axial pressing of the thin-walled ring can be respectively achieved through different parts of the pressing plate.

[0025] (3) In the present invention, through the rotational connection between the height adjustment assembly and the pressing plate, it is convenient to adjust the orientation of the pressing plate so that it can press the thin-walled ring blank when it is located inside and outside the inner ring of the thin-walled ring blank, without the need to overall adjust the installation position of the pressing mechanism.

[0026] (4) In the present invention, a pressing screw is further provided on the pressing mechanism. When performing the axial pressing of the thin-walled ring blank, first adjust the height position of the pressing plate through the height adjustment assembly so that the axial pressing portion abuts against the upper surface of the thin-walled ring blank, and then tighten the pressing screw to achieve further pressing, avoiding the situation of blank displacement during the processing.

[0027] (5) In the present invention, by forging and quenching and tempering the bearing outer ring blank, the floating ring is no longer forged separately as a thin-walled ring, but is forged as a part of the bearing outer ring blank, avoiding problems such as deformation, cracking, and uneven organization during the separate forging of the thin-walled floating ring, which affect the service performance of the floating ring; only forging and processing the bearing outer ring and quenching and tempering treatment completely eliminate the raw materials, machining, and quenching and tempering treatment processes of the thin-walled ring, improving the processing efficiency and processing accuracy of the thin-walled ring, and at the same time improving the material utilization rate of the bearing outer ring. Using the processing raw materials of the bearing outer ring to produce the thin-walled ring ensures that the bearing outer ring and the floating ring have the same organization and mechanical properties, improving the overall service performance of the roadheader product.

[0028] (6) In the present invention, by using the dimensional difference between the bearing outer ring and the floating ring, there is no need to additionally set the blank of the floating ring, and the floating ring is directly made of the processing surplus of the bearing outer ring, which can save more raw materials than the ordinary combined forging process.

[0029] In addition to the purposes, features, and advantages described above, the present invention has other purposes, features, and advantages. The following will refer to the drawings for a further detailed description of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 is a schematic diagram of the structure of the bearing outer ring and the floating ring in the main bearing in the embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the ring blank obtained in step B of a processing method for thin-walled rings in the embodiment of the present application;

[0033] Figure 3 It is a schematic diagram of the splitting of the first blank and the second blank in step D of a thin-walled ring part processing method in an embodiment of the present application;

[0034] Figure 4 It is a top view of a thin-walled ring part processing tooling in an embodiment of the present application;

[0035] Figure 5 It is in an embodiment of the present application Figure 4 A-A sectional view;

[0036] Figure 6 It is a schematic structural diagram of a pressing plate in an embodiment of the present application;

[0037] Figure 7 It is a schematic diagram of the axial pressing method when processing the inner ring of the second blank in an embodiment of the present application;

[0038] Figure 8 It is a schematic diagram of the radial pressing method when processing the upper surface of the second blank in an embodiment of the present application;

[0039] Figure 9 It is a schematic diagram of the axial pressing method when processing the outer ring of the second blank in an embodiment of the present application;

[0040] Wherein, 1. Base, 1.1 Slide rail, 2. Support seat, 3. Pressing mechanism, 3.1 Height adjustment component, 3.2 Pressing plate, 3.2.1 Radial pressing part, 3.2.2 Axial pressing part, 3.3 Mounting seat, 3.4 Pressing screw, 4. Bearing outer ring, 5. Floating ring, 6. Ring blank, 7. Radial annular groove, 8. First blank, 9. Second blank. Detailed implementation manners

[0041] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0042] Embodiment:

[0043] Refer to Figures 1 to 9 , a thin-walled ring part processing tooling and processing method, this embodiment is applied to the processing, manufacturing and deformation control of the bearing outer ring and the floating ring of the main bearing of a roadheader. Refer to Figure 1 , in the main bearing of a roadheader, it includes a bearing outer ring 4 and a floating ring 5, wherein the floating ring 5 is the thin-walled ring part prepared in this embodiment.

[0044] A thin-walled ring part processing tooling includes a base 1, a plurality of support seats 2 and a pressing mechanism 3; the support seats 2 and the pressing mechanism 3 are both movably connected to the base 1, and the plurality of support seats 2 and the plurality of pressing mechanisms 3 are arranged at intervals along the circumference of the base 1, as Figure 4As shown in the figure; the pressing mechanism 3 includes a height adjustment component 3.1 and a pressing plate 3.2 arranged on the height adjustment component 3.1. The pressing plate 3.2 is provided with a radial pressing part 3.2.1 and an axial pressing part 3.2.2, which are respectively used for pressing the thin-walled ring part radially or axially, controlling the deformation amount of the thin-walled ring part during the processing, and improving the processing accuracy of the thin-walled ring part.

[0045] See Figure 6 , the pressing plate 3.2 is a Z-shaped structural member; the radial pressing part 3.2.1 is located inside the right angle of the Z-shaped structural member. By abutting the radial pressing part 3.2.1 against the circumferential surface of the inner ring or outer ring of the blank of the thin-walled ring part, the radial pressing of the blank of the thin-walled ring part is realized; the axial pressing part 3.2.2 is located at the bottom of the Z-shaped structural member, and the axial pressing part 3.2.2 is pressed against the upper surface of the blank of the thin-walled ring part, and is combined with the support seat 2 to realize the axial pressing of the blank of the thin-walled ring part.

[0046] The pressing plate 3.2 is rotatably connected to the height adjustment component 3.1, which is convenient for adjusting the orientation of the pressing plate 3.2, so that when it is located inside and outside the blank of the thin-walled ring part, it can press the blank of the thin-walled ring part without the need to adjust the installation position of the pressing mechanism 3 as a whole, as Figure 5 , Figures 7 to 9 shown.

[0047] See Figure 7 and Figure 9 , the pressing mechanism 3 further includes a mounting seat 3.3 and a pressing screw 3.4; the height adjustment component 3.1 is arranged on the mounting seat 3.3; the pressing screw 3.4 passes through the pressing plate 3.2 and is threadedly connected to the mounting seat 3.3. When axially pressing the blank of the thin-walled ring part, first adjust the height position of the pressing plate 3.2 through the height adjustment component 3.1 so that the axial pressing part 3.2.2 abuts against the upper surface of the blank of the thin-walled ring part, and then tighten the pressing screw 3.4 to achieve further pressing, avoiding the situation of blank displacement during the processing. In this embodiment, the height adjustment component 3.1 is an adjustment bolt component threadedly connected to the mounting seat 3.3. The mounting seat 3.3 is provided with a threaded hole. By adjusting the threaded connection position between the height adjustment component 3.1 and the mounting seat 3.3 and adjusting the depth of the height adjustment component 3.1 screwed into the threaded hole, the height position adjustment of the pressing plate 3.2 is realized.

[0048] Both the support seat 2 and the pressing mechanism 3 are slidably connected to the base 1. A plurality of slide rails 1.1 are arranged on the base 1 along its radial direction, as Figure 4 shown. By adjusting the positions of the support seat 2 and the pressing mechanism 3, it can be applicable to support and fix blanks of thin-walled ring parts with different specifications, improving the versatility of the processing tooling for thin-walled ring parts.

[0049] A processing method for a thin-walled ring part, which adopts the above-mentioned processing tooling for thin-walled ring parts, includes the following steps:

[0050] Step A: Forge the blank material to form a ring blank.

[0051] Since the floating ring 5 is a thin-walled ring part with a large diameter and a small wall thickness, when forging the thin-walled ring part alone, situations such as deformation, cracking, and uneven structure are likely to occur, which will cause the mechanical properties of the floating ring 5 and the bearing outer ring 4 to be different, thus affecting the performance of the main bearing.

[0052] The blank material used in this embodiment is for forging the blanks of the bearing outer ring 4 and the floating ring 5 (i.e., the thin-walled ring part). The blanks of the bearing outer ring 4 and the floating ring 5 are forged together as a whole according to the forging process and requirements of the bearing outer ring 4. At the same time, process flows such as heating, plastic deformation, cooling of the forging, and punching are carried out. After passing the inspection, a ring blank 6 with consistent mechanical properties and uniform structure can be obtained. The inspection items include shape and size, surface quality, metallographic structure, and mechanical properties, etc.

[0053] Step B: Rough-turn the inner and outer circles of the ring blank 6, and machine a radial annular groove 7 on the inner circle of the ring blank 6.

[0054] After rough turning, machining allowances are reserved on the inner circle of the ring blank 6, the outer circle of the ring blank 6, and the axial direction of the ring blank 6; the minimum distance L from the radial annular groove 7 to the end face of the ring blank 6 is 8 - 10 mm larger than the thickness of the thin-walled ring part.

[0055] In this embodiment, the radial machining allowance of the inner circle of the ring blank 6 is 5 mm, the radial machining allowance of the outer circle of the ring blank 6 is 5 mm, the total machining allowance in the radial direction of the ring blank 6 is 10 mm, and the axial machining allowance of the ring blank 6 is 8 mm. This machining allowance is relative to the size of the bearing outer ring 4. Since the blank material used for the thin-walled ring part is less, the blank material can be directly cut on the ring blank 6 of the bearing outer ring 4 to achieve the purpose of saving blank material.

[0056] The minimum distance L from the radial annular groove 7 to the end face of the ring blank 6 is 8 mm - 10 mm larger than the thickness of the thin-walled ring part, which is to reserve the axial machining allowance of the blank of the floating ring 5. In this embodiment, the groove width of the radial annular groove 7 is below 25 mm, and the groove depth is below 160 mm, to avoid the size of the radial annular groove 7 being too large and affecting the machining allowances of the bearing outer ring 4 and the floating ring 5.

[0057] Step C: Perform quenching and tempering treatment on the ring blank 6.

[0058] Performing quenching and tempering treatment on the blanks of the bearing outer ring 4 and the floating ring 5 as a whole can improve the strength, plasticity, and toughness of the ring blank 6 as a whole, and obtain a ring blank 6 with good comprehensive mechanical properties.

[0059] Step D: Cut the quenched and tempered ring blank 6 from the radial annular groove 7 (i.e., first feed from the radial annular groove 7 in the radial direction, and then cut from the axial direction to the radial annular groove 7) into a first blank 8 and a second blank 9;

[0060] After rough turning all the outer surfaces, cut the ring blank 6 from the radial annular groove 7 into a first blank 8 and a second blank 9. Among them, the first blank 8 is used to prepare the bearing outer ring 4, and the second blank 9 is used to prepare the floating ring 5 (i.e., the thin-walled ring part). When cutting, the second blank 9 should have a machining allowance of more than 5 mm in the radial direction. In this embodiment, there is a difference of more than 15 mm between the inner diameter of the bearing outer ring 4 at the cutting position and the outer diameter of the floating ring 5. Therefore, sufficient machining allowance can be ensured.

[0061] Step E: Process the first blank 8 and the second blank 9 respectively. In this embodiment, the second blank 9 is placed on the thin-walled ring part processing fixture and processed into a thin-walled ring part (i.e., the floating ring 5).

[0062] In this embodiment, the cut first blank 8 and second blank 9 are respectively processed into the bearing outer ring 4 and the floating ring 5. Among them, the steps of processing the floating ring 5 are as follows:

[0063] E1: According to the specifications of the second blank 9, slide the support seat 2 and the pressing mechanism 3 on the slide rail 1.1 so that the support seat 2 is located at a suitable position to support the second blank 9, and the pressing mechanism 3 is located at a suitable position to fix the second blank 9. In this embodiment, in order to achieve uniform support and fixation of the annular second blank 9, multiple support seats 2 and pressing mechanisms 3 are uniformly arranged on the base 1.

[0064] E2: Place the second blank 9 on the support seat 2, and make the radial pressing part 3.2.1 of the pressing plate 3.2 abut against the outer ring of the second blank 9, as Figure 5 or Figure 8 shown, and turn the upper and lower surfaces of the second blank 9 to machine the reference surface C and the raceway surface D.

[0065] E3: Arrange multiple pressing mechanisms 3 evenly along the outer ring of the second blank 9, and make the axial pressing part 3.2.2 of the pressing plate 3.2 abut against the upper surface of the second blank 9, and turn the inner ring of the second blank 9, as Figure 7 shown;

[0066] Arrange multiple pressing mechanisms 3 evenly along the inner ring of the second blank 9, and make the axial pressing part 3.2.2 of the pressing plate 3.2 abut against the upper surface of the second blank 9, and turn the outer ring of the second blank 9, as Figure 9 shown.

[0067] E4: After grinding the end faces of the thin-walled ring (i.e., the floating ring 5), quench the upper and lower end faces of the thin-walled ring (i.e., the floating ring 5). As can be seen from Figure 1 the upper end face of the floating ring 5 contacts the roller, and the lower end face contacts the disc spring group. Quenching can improve the mechanical properties of the upper and lower end faces of the floating ring 5.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A processing tooling for thin-walled ring parts, characterized in that, it includes a base (1), a plurality of support seats (2) and a pressing mechanism (3); the support seats (2) and the pressing mechanism (3) are both movably connected to the base (1), and the plurality of support seats (2) and the plurality of pressing mechanisms (3) are arranged at intervals along the circumference of the base (1); the pressing mechanism (3) includes a height adjustment component (3.1) and a pressing plate (3.2) arranged on the height adjustment component (3.1). The pressing plate (3.2) is provided with a radial pressing part (3.2.1) and an axial pressing part (3.2.2), which are respectively used for pressing the thin-walled ring part radially or axially; the support seats (2) and the pressing mechanism (3) are both slidably connected to the base (1), and a plurality of slide rails (1.1) are arranged on the base (1) along its radial direction; the pressing plate (3.2) is a Z-shaped structural part; the radial pressing part (3.2.1) is located inside the right angle of the Z-shaped structural part, and the axial pressing part (3.2.2) is located at the bottom of the Z-shaped structural part.

2. A processing tooling for thin-walled ring parts according to claim 1, characterized in that, the pressing plate (3.2) is rotatably connected to the height adjustment component (3.1).

3. A processing tooling for thin-walled ring parts according to any one of claims 1 to 2, characterized in that, the pressing mechanism (3) further includes a mounting seat (3.3) and a pressing screw (3.4); the height adjustment component (3.1) is arranged on the mounting seat (3.3); the pressing screw (3.4) penetrates through the pressing plate (3.2) and is threadedly connected to the mounting seat (3.3).

4. A processing method for thin-walled ring parts, which adopts the processing tooling for thin-walled ring parts according to any one of claims 1 to 3, characterized in that, it includes the following steps: Step A: Forge the blank material to make a ring blank; Step B: Rough turn the inner and outer circles of the ring blank, and turn a radial annular groove on the inner circle of the ring blank; Step C: Quench and temper the ring blank; Step D: Cut the quenched and tempered ring blank into a first blank and a second blank from the radial annular groove; Step E: Process the first blank and the second blank respectively, including setting one of the first blank or the second blank on the processing tooling for thin-walled ring parts to process it into a thin-walled ring part.

5. A processing method for thin-walled ring parts according to claim 4, characterized in that, in the step B, after rough turning, machining allowances are reserved on the inner circle, outer circle and axial direction of the ring blank; the minimum distance from the radial annular groove to the end face of the ring blank is 8 - 10 mm larger than the thickness of the thin-walled ring part.

6. A processing method for thin-walled ring parts according to claim 4, characterized in that, in the step E, set the second blank on the processing tooling for thin-walled ring parts, make the radial pressing part (3.2.1) of the pressing plate (3.2) abut against the outer circle of the second blank, and turn the upper and lower surfaces of the second blank.

7. A processing method for thin-walled ring parts according to claim 6, characterized in that, In the step E, a plurality of pressing mechanisms (3) are uniformly arranged along the outer circumference of the second blank, and the axial pressing part (3.2.2) of the pressing plate (3.2) is abutted against the upper surface of the second blank to turn the inner circumference of the second blank; A plurality of pressing mechanisms (3) are uniformly arranged along the inner circumference of the second blank, and the axial pressing part (3.2.2) of the pressing plate (3.2) is abutted against the upper surface of the second blank to turn the outer circumference of the second blank.

8. A method for machining a thin-walled ring part according to claim 4, characterized in that in the step E, after grinding the end face of the thin-walled ring part, quenching is performed on the thin-walled ring part.

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