A load-bearing saddle turning tool and method

Abstract

The present invention discloses a saddle-carrying turning tool and method. The saddle-carrying turning tool of the present invention is used for turning the precision-machined arc surface of a saddle casting blank, comprising: a frame body, comprising a coaxially arranged mounting ring disk and an outer ring disk, two parallel flat clamps fixedly connected between the mounting ring disk and the outer ring disk, the flat clamps being perpendicular to the mounting ring disk, the two flat clamps being symmetrically arranged about the axis of the mounting ring disk, and the inner side walls of the flat clamps contacting the top surface of the saddle casting blank; a front and rear positioning assembly for positioning two saddle casting blanks that are face-to-face and centrally symmetrically arranged within the frame body, thereby preventing the saddle casting blanks from moving forward and backward during turning; and a left and right positioning assembly for positioning two saddle casting blanks that are face-to-face and centrally symmetrically arranged within the frame body, thereby preventing the saddle casting blanks from moving left and right during turning. The present invention can simultaneously install two saddle casting blanks on a lathe chuck for face-to-face machining of the inner hole surface, thereby improving machining efficiency and quality.

Description

Technical Field

[0001] The invention relates to the technical field of casting processing, in particular to a turning tool and method for a load-bearing saddle. Background Art

[0002] The load-bearing saddle is a key component of the railway freight car bogie and plays a vital role in driving safety. The load-bearing saddle is generally manufactured by machining after casting, such as Figure 1 The figure shows a saddle casting 1' that supports the saddle. The finely machined arc surface 101' of the saddle casting 1' contacts the bearing below. Its assembly dimensions are critical, directly impacting the quality of the assembly between the saddle and the bearing. Existing machining processes often use simple fixtures such as backing plates and pressure plates to secure the saddle to the lathe's tooling chuck for turning. This can easily loosen and fall off, affecting machining accuracy and quality. Alternatively, individual pieces are mounted and then bored on a boring machine, resulting in low machining efficiency.

[0003] In order to overcome the above problems, a load-bearing saddle turning tool and method are needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a bearing saddle turning tool and method, which can install two saddle castings on a lathe chuck at one time to carry out face-to-face processing of the inner hole surface, thereby improving the processing efficiency and quality.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a load-bearing saddle turning tool for turning a precision-machined arc surface of a saddle casting blank, comprising:

[0007] The frame body includes a coaxially arranged mounting ring disk and an outer ring disk, two parallel flat clamping plates are fixedly connected between the mounting ring disk and the outer ring disk, the flat clamping plates are perpendicular to the mounting ring disk, the two flat clamping plates are symmetrically arranged about the axis of the mounting ring disk, and the inner side walls of the flat clamping plates contact the top surface of the saddle casting blank;

[0008] Front and rear positioning components, used for positioning two saddle casting blanks that are centrally symmetrically arranged face to face in the frame body, and capable of preventing the saddle casting blanks from moving forward and backward during turning;

[0009] The left and right positioning components are used to position the two saddle casting blanks that are arranged face to face and symmetrically in the frame body, and can prevent the saddle casting blanks from moving left and right during the turning process.

[0010] Furthermore, the front and rear positioning components include an internal limiting structure and an external tightening screw. The internal limiting structure is arranged on the inner side wall of the mounting ring disk and can contact and limit the front side wall of the saddle casting blank; a plurality of the external tightening screws are threadedly connected to the outer ring disk, and the inner end of the external tightening screw is pressed against the rear side wall of the saddle casting blank.

[0011] Furthermore, the inner limiting structure includes a plurality of inner limiting top screws, the inner limiting top screws are threadedly connected to the mounting ring disk, and the inner ends of the inner limiting top screws contact and limit the front side wall.

[0012] Furthermore, a lock nut is threadedly connected to the inner limit screw, and the lock nut is locked on the inner side wall of the mounting ring disk.

[0013] Furthermore, there are two groups of left and right positioning components, and the two groups of left and right positioning components are symmetrically arranged about the axis of the mounting ring disk, and respectively perform left and right positioning on the two saddle billets; the left and right positioning components include an inner baffle and a right-angle pressure plate, and the inner baffle is arranged perpendicular to the flat clamping plate and the two ends are respectively fixedly connected to the inner side walls of the mounting ring disk and the outer ring disk, and the inner baffle limits the end face of the rib of the saddle billet; guide grooves are centrally provided at both ends of the flat clamping plate, and the right-angle pressure plate is installed on the opposite side of the inner baffle by means of clamping bolts and presses and positions the other end face of the saddle billet.

[0014] Furthermore, a pad head is provided at the top end of the right-angle pressing plate, and the pad head is clamped between the bottom surfaces of the two saddle castings.

[0015] Furthermore, the mounting ring disk and the outer ring disk are provided with limited shallow grooves at the mounting positions of the flat clamping plate, and each connection position is connected together by a plurality of locking screws.

[0016] Furthermore, the periphery of the mounting ring disk is provided with mounting slots, and the four mounting slots are evenly distributed on the outer edge of the mounting ring disk; the mounting ring disk is coaxially fixedly connected to the adapter disk on the lathe through the mounting slots.

[0017] Furthermore, a detection notch is provided on the edge of the center hole of the outer ring disk, and two detection notches are centrally symmetrically arranged at the edge of the center hole of the outer ring disk.

[0018] The present invention also discloses a method for turning a load-bearing saddle, which uses any of the above-mentioned load-bearing saddle turning tools to turn the finished arc surface of the saddle casting, comprising the following steps:

[0019] Step 1: Preparation: Coaxially install the bearing saddle turning tool on the main spindle chuck of the lathe, install the adapter plate on the main spindle chuck, and connect the adapter plate to the mounting ring plate;

[0020] Step 2: Clamping the workpieces: inserting two saddle castings with the top and bottom surfaces preliminarily processed into the frame body in sequence and arranging them face to face and coaxially; clamping and positioning the two saddle castings by adjusting the front and rear positioning components and the left and right positioning components;

[0021] Step 3: Turning: Start the lathe and use the turning tool to synchronously process the finishing arc surfaces of the two saddle castings.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] The present invention carries a saddle turning tool, and performs a fully enclosed clamping of two saddle billets that are symmetrically arranged face to face by installing an inner cavity space enclosed by an annular disk, an outer ring disk, and a flat clamping plate, thereby ensuring the installation strength of the saddle billets and preventing the saddle billets from falling off; the turning and clamping position of the saddle billets is fine-tuned by the front and rear positioning components and the left and right positioning components, ensuring that the two saddle billets are coaxial and aligned front and back, thereby ensuring the processing accuracy of synchronous turning.

[0024] Furthermore, four internal stop screws secure the front sidewall of the saddle billet. Rotating these screws allows for fine-tuning of the stop position, facilitating flexible adjustment and adapting to saddle billet widths. Locknuts secure the internal stop screws to the inner sidewall of the mounting ring, preventing loosening and inaccurate positioning. The inner baffle and right-angled clamping plate position and clamp the saddle billet horizontally, creating a centrally symmetrical feed port for quick locking. Side stop screws are added at both ends of the inner baffle, with their inner tips securing the end faces of the ribs, enabling post-processing of saddle billets of varying lengths. A spacer bar is provided at the top of the right-angled clamping plate. During installation, the plate not only secures the saddle billet horizontally but also inserts into the bottom surface of the billet, assisting in vertical positioning. Shallow grooves on the inner sidewalls of the mounting ring and outer ring, which engage with the flat clamping plates, facilitate quick assembly during initial commissioning of the fixture. The addition of mounting slots facilitates installation of the fixture on the lathe spindle and facilitates removal and replacement. Two symmetrical inspection slots on the edge of the outer ring's center hole facilitate the use of an internal diameter caliper when measuring the dimensions of finely machined arc surfaces, enabling lathe operators to accurately monitor machining dimensions.

[0025] The load-bearing saddle turning method of the present invention can simultaneously install two saddle castings, and the turning tool can simultaneously perform synchronous turning processing on the two saddle castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the saddle casting blank;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the load-bearing saddle turning tool of the present invention;

[0029] Figure 3 This is a schematic diagram of the main cross-sectional structure of the load-bearing saddle turning tool of the present invention;

[0030] Figure 4 This is a schematic diagram of the right side structure of the load-bearing saddle turning tool of the present invention;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the saddle turning tool of the present invention with the right-angle pressing plate separated;

[0032] Figure 6 This is a schematic diagram of the main cross-sectional structure of the saddle turning tool after the saddle casting is installed.

[0033] Description of reference numerals: 1', saddle casting blank; 101', finely machined arc surface; 102', top surface; 103', bottom surface; 104', front side wall; 105', rib end surface;

[0034] 1. Mounting ring plate; 101. Mounting slot; 2. Outer ring plate; 201. Inspection slot; 3. Flat clamping plate; 301. Guide slot; 4. Inner baffle; 5. Right-angle clamping plate; 501. Spacer head; 6. Locking screw; 7. Inner limit screw; 8. Outer pressure screw; 9. Side screw; 10. Mounting bolt. DETAILED DESCRIPTION

[0035] The core of the invention is to provide a bearing saddle turning tool and method, which can install two saddle castings on the lathe chuck at one time to carry out face-to-face processing of the inner hole surface, thereby improving the processing efficiency and quality.

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, 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 should not be understood as limiting the present invention.

[0038] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the three-dimensional structure of the saddle casting blank; Figure 2 This is a schematic diagram of the three-dimensional structure of the load-bearing saddle turning tool of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of the load-bearing saddle turning tool of the present invention; Figure 4 This is a schematic diagram of the right side structure of the load-bearing saddle turning tool of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the saddle turning tool of the present invention with the right-angle pressing plate separated; Figure 6 This is a schematic diagram of the main cross-sectional structure of the saddle turning tool after the saddle casting is installed.

[0039] In one embodiment, Figures 1 to 6 As shown, the present invention's load-bearing saddle turning tool is used for turning the finishing arc surface 101' of the saddle casting slab 1'. The specific structure of the present invention's load-bearing saddle turning tool includes:

[0040] The frame body includes a coaxially arranged mounting ring disc 1 and an outer ring disc 2, both of which are circular ring plates. Two parallel flat clamping plates 3 are fixedly connected between the mounting ring disc 1 and the outer ring disc 2. The flat clamping plates 3 are perpendicular to the mounting ring disc 1 and are symmetrically arranged about the axis of the mounting ring disc 1. The inner sidewalls of the flat clamping plates 3 contact the top surface 102' of the saddle casting slab 1', that is, the inner sidewalls of the flat clamping plates 3 limit the top surface 102'. The two saddle casting slabs 1', arranged symmetrically with respect to each other, can be accommodated in the inner cavity of the frame body.

[0041] For some specifications of bearing saddles, the finished arc surface 101' is close to a semicircular shape. Under the premise of leaving a machining allowance, a 180-degree arc groove can be ensured during turning. In other words, the height of the two saddle castings 1' is just adapted to the distance between the two flat clamping plates 3.

[0042] The front and rear positioning components are used to position two saddle casting blanks 1' arranged face-to-face and symmetrically within the frame body, preventing the saddle casting blanks 1' from moving forward and backward during turning. The front and rear direction is defined as the lathe spindle direction, and the inner end is defined as the front end.

[0043] The left and right positioning components are used to position two saddle casting blanks 1' arranged face-to-face and symmetrically in the frame body to prevent the saddle casting blanks 1' from moving left and right during turning. The left and right direction is defined as the horizontal direction perpendicular to the lathe spindle.

[0044] By installing the inner cavity space enclosed by the ring disk 1, the outer ring disk 2 and the flat clamping plate 3, the two saddle billets 1' arranged face to face and symmetrically are fully surrounded and clamped, which can ensure the installation strength of the saddle billets 1' and prevent the saddle billets 1' from falling off; the turning and clamping position of the saddle billets 1' is fine-tuned by the front and rear positioning components and the left and right positioning components to ensure that the two saddle billets 1' are coaxial and aligned front and back, thereby ensuring the processing accuracy of synchronous turning.

[0045] In one embodiment of the present invention, Figures 1 to 5 As shown, the front and rear positioning assembly includes an internal limiting structure and an external pressing screw 8. The internal limiting structure is arranged on the inner side wall of the mounting ring disk 1 and is capable of contacting the front side wall 104' of the saddle casting 1'. Multiple external pressing screws 8 are threadedly connected to the outer ring disk 2, and the inner ends of the external pressing screws 8 are pressed against the rear side wall of the saddle casting 1'. In a specific embodiment, the number of external pressing screws 8 is four, two in a group, and a group of external pressing screws 8 presses against the rear side wall of a saddle casting 1'.

[0046] Specifically, if Figure 4 As shown, the internal limiting structure includes multiple internal limiting screws 7, which are threaded onto the mounting ring 1. The inner ends of the internal limiting screws 7 contact the limiting front side wall 104'. In one specific embodiment, there are four internal limiting screws 7, two in a group, and each group of internal limiting screws 7 presses against the front side wall of a saddle casting slab 1'.

[0047] Obviously, the internal limiting structure can also be implemented using limiting posts, with the front end of the limiting posts fixed to the inner sidewall of the mounting ring 1, and the rear end of the limiting posts abutting the front sidewall of the saddle casting 1'. Different width specifications of saddle castings 1' require different limiting posts. Similar simple replacement methods fall within the scope of protection of the present invention.

[0048] Specifically, if Figure 4 As shown, a lock nut is threadedly connected to the inner limit screw 7, and the lock nut is locked on the inner side wall of the mounting ring disk 1.

[0049] Four internal limit screws 7 are used to limit the front side wall of the saddle casting 1'. By rotating the internal limit screws 7, the limit position can be fine-tuned, allowing for flexible adjustment of the limit position and adapting to the positioning of saddle castings 1' of varying widths. Furthermore, by using a lock nut to tighten the internal limit screws 7 against the inner side wall of the mounting ring 1, inaccurate positioning caused by loosening of the internal limit screws 7 can be prevented.

[0050] In one embodiment of the present invention, Figures 2 to 6 As shown, there are two groups of left and right positioning components, which are symmetrically arranged about the axis of the mounting ring disc 1 and respectively perform left and right positioning on the two saddle casting blanks 1'.

[0051] Specifically, if Figures 2 to 6 As shown, the left and right positioning components include an inner baffle 4 and a right-angled clamping plate 5. The inner baffle 4 is arranged perpendicular to the flat clamping plate 3 and its two ends are fixedly connected to the inner side walls of the mounting ring disk 1 and the outer ring disk 2 respectively. The inner baffle 4 limits the end face 105' of the saddle casting blank 1'. The two ends of the inner baffle 4 can be directly welded to the inner side walls of the mounting ring disk 1 and the outer ring disk 2 or connected by screws. A guide slot 301 is provided in the center of both ends of the flat clamping plate 3. The right-angled clamping plate 5 is installed on the opposite side of the inner baffle 4 by means of a clamping bolt 10 and presses and positions the other end face of the saddle casting blank 1'. The clamping bolt 10 is fitted into the guide slot 301. That is, the vertical plate of the right-angled clamping plate 5 presses against the end face of the saddle casting blank 1' in the longitudinal direction.

[0052] Specifically, if Figures 2 to 6 As shown, both ends of the inner baffle 4 are connected with side top screws 9 through threaded holes, and the inner ends of the side top screws 9 abut against the end surface 105 ′ of the rib.

[0053] In fact, the distance between the bottom surface of the inner baffle 4 and the opposite flat clamping plate 3 is slightly greater than the height of the saddle casting 1', so that the opening below the inner baffle 4 is the feed port. During the feeding and clamping process, it is mainly necessary to install the right-angle clamping plate 5 for clamping.

[0054] The saddle casting blank 1' is positioned and pressed in the left and right directions by the inner baffle plate 4 and the right-angle pressing plate 5 to form a centrally symmetrical feed port, which facilitates its rapid locking. By adding side top screws 9 at both ends of the inner baffle plate 4, the inner end of the side top screw 9 limits the end face 105' of the retaining edge, so that the saddle casting blanks 1' of different length specifications can be limited and then processed.

[0055] In one embodiment of the present invention, Figure 3 and Figure 6 As shown, a spacer strip head 501 is provided at the top end of the right-angle pressing plate 5 , and the spacer strip head 501 is clamped between the bottom surfaces 103 ′ of the two saddle casting strands 1 ′.

[0056] For some sizes of saddle billets 1', their height is low, meaning the finished arc surface 101' is not a semi-circular surface. In this case, leaving a large machining allowance to ensure that two saddle billets 1' can be aligned to form a full circle before machining will result in a waste of raw materials and a large machining workload. Therefore, a spacer head 501 is provided at the top of the right-angled pressure plate 5 to increase the height. That is, the height of the two saddle billets 1' plus the spacer head 501 is exactly adapted to the spacing between the two flat clamping plates 3.

[0057] Specifically, an inserting end surface of the spacer head 501 is additionally provided with an oblique chamfer.

[0058] By setting a pad head 501 at the top of the right-angle clamping plate 5, during the installation of the right-angle clamping plate 5, not only the saddle casting 1' is clamped and positioned in the left and right directions, but at the same time the pad head 501 is inserted between the bottom surface 103' of the saddle casting 1', thereby assisting in completing the upper and lower direction limitation.

[0059] In one embodiment of the present invention, Figure 2 、 Figure 4 and Figure 5 As shown, the mounting ring disc 1 and the outer ring disc 2 are provided with shallow limiting grooves at the mounting locations of the flat clamping plate 3, into which the long sides of the flat clamping plate 3 are embedded. Furthermore, each connection location is connected together by multiple locking screws 6. In one specific embodiment, there are three locking screws 6.

[0060] Specifically, in order to increase the connection strength between the flat splint 3 and the ring disc, after confirming that the tooling can meet the clamping processing requirements, the flat splint 3 is directly welded to the side wall of the ring disc, making the tooling more stable and reliable.

[0061] By providing shallow limiting grooves on the inner side walls of the mounting ring disc 1 and the outer ring disc 2 to engage with the flat clamping plate 3 , rapid assembly is facilitated during the initial debugging process.

[0062] In one embodiment of the present invention, Figure 2 、 Figure 4 and Figure 5 As shown, the outer periphery of the mounting ring disc 1 is provided with mounting slots 101, and four mounting slots 101 are evenly distributed on the outer edge of the mounting ring disc 1. The mounting ring disc 1 is coaxially fixedly connected to the adapter disc on the lathe through the mounting slots 101.

[0063] By adding the mounting slot 101 , the tooling of the present invention can be easily mounted on the lathe spindle, and can also be easily disassembled and replaced.

[0064] In one embodiment of the present invention, Figure 2As shown, a detection notch 201 is provided on the edge of the center hole of the outer ring disk 2 , and two detection notches 201 are centrally symmetrically arranged at the edge of the center hole of the outer ring disk 2 .

[0065] By symmetrically setting two detection notches 201 at the edge of the center hole of the outer ring disk 2, it is convenient to use an inner diameter caliper when measuring the size of the finely machined arc surface 101', so that the turning worker can control the machining size.

[0066] In summary, the saddle turning tool of the present invention fully encloses and clamps two saddle billets 1' arranged face-to-face and symmetrically in center by installing the inner cavity space formed by the ring disk 1, the outer ring disk 2, and the flat clamping plate 3, thereby ensuring the installation strength of the saddle billets 1' and preventing the saddle billets 1' from falling off; the turning and clamping positions of the saddle billets 1' are fine-tuned by the front and rear positioning components and the left and right positioning components to ensure that the two saddle billets 1' are coaxial and aligned front to back, thereby ensuring the processing accuracy of synchronous turning. In addition, the front side wall of the saddle billet 1' is limited by four internal limit screws 7. By rotating the internal limit screws 7, the limit position can be slightly adjusted, which facilitates flexible adjustment of the limit position and is suitable for positioning saddle billets 1' of different width specifications. Moreover, by using a lock nut to tighten the internal limit screws 7 to the inner side wall of the mounting ring disk 1, the problem of inaccurate limit caused by loosening of the internal limit screws 7 can be prevented. The inner baffle 4 and the right-angled pressure plate 5 position and clamp the saddle slab 1' in both directions, forming a centrally symmetrical feed port that facilitates quick locking. Side screws 9 are added to both ends of the inner baffle 4, with their inner ends securing the rib end faces 105', enabling post-processing of saddle slabs 1' of varying lengths. A spacer head 501 is provided at the top of the right-angled pressure plate 5. During installation, the spacer head 501 not only secures and positions the saddle slab 1' in both directions but also inserts between the bottom surface 103' of the saddle slab 1', assisting in vertical positioning. Shallow positioning grooves are provided on the inner sidewalls of the mounting ring disc 1 and outer ring disc 2, which engage with the flat clamping plate 3, facilitating rapid assembly during initial tooling commissioning. The addition of a mounting notch 101 facilitates installation of the present tooling onto the lathe spindle and facilitates disassembly and replacement. By symmetrically setting two detection notches 201 at the edge of the center hole of the outer ring disk 2, it is convenient to use an inner diameter caliper when measuring the size of the finely machined arc surface 101', so that the turning worker can control the machining size.

[0067] The present invention further discloses a method for turning a load-bearing saddle, which uses the load-bearing saddle turning tool of any of the above embodiments to turn the finished arc surface 101' of the saddle casting blank 1', comprising the following steps:

[0068] Step 1: Preparation: Install the bearing saddle turning fixture coaxially on the spindle chuck of the lathe. The spindle chuck is clamped with an adapter plate. The adapter plate is connected to the clamping slot 101 of the mounting ring plate 1 through four bolts.

[0069] Step 2, clamp the workpiece, insert the two saddle billets 1' into the frame body in turn and set them face to face and coaxially. When loading the saddle billets 1', load them one by one and push them in from different feeding ports on the left and right ends respectively, and then use the right-angle clamping plate 5 to preliminarily clamp them. The top surface 102' of the saddle billet 1' slides on the inner wall of the flat clamp 3. The two saddle billets 1' are clamped and positioned by adjusting the front and rear positioning components and the left and right positioning components. First, during the adjustment process, use a wrench tool to pre-tighten the external tightening screws 8 one by one to preliminarily lock the front and rear positions of the two saddle billets 1'. Use a rubber hammer to knock on the right-angle clamping plate 5 so that the right-angle clamping plate 5 is tightened in the length direction of the saddle billet 1', then tighten the clamping bolts 10 and finally tighten the external tightening screws 8.

[0070] Step 3: Turning: Start the lathe and use the turning tool to synchronously machine the finishing arc surfaces 101 ′ of the two saddle castings 1 ′.

[0071] Step 4: Unloading. Use an internal diameter caliper to measure the size of the finished arc surface 101'. Once it meets the design requirements, stop the machine. Loosen the external pressing screw 8, then loosen the clamping bolt 10, remove the right-angle pressing plate 5, and take out the processed saddle casting 1'.

[0072] In a specific embodiment of the load-bearing saddle turning method of the present invention, for saddle castings 1' with relatively low height specifications, a right-angle pressing plate 5 with a spacer head 501 is required to complete auxiliary positioning of the saddle castings 1' in the vertical direction.

[0073] The load-bearing saddle turning method of the present invention can simultaneously install two saddle castings 1', and the turning tool can simultaneously perform synchronous turning processing on the two saddle castings 1'.

[0074] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0075] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A saddle turning tool for turning a saddle casting blank (1') to form a finely machined arc surface (101'), characterized in that: include: A frame body, comprising a coaxially arranged mounting ring disc (1) and an outer ring disc (2), wherein two parallel flat clamping plates (3) are fixedly connected between the mounting ring disc (1) and the outer ring disc (2), wherein the flat clamping plates (3) are perpendicular to the mounting ring disc (1), and the two flat clamping plates (3) are symmetrically arranged about the axis of the mounting ring disc (1), and the inner side walls of the flat clamping plates (3) contact the top surface (102') of the saddle casting blank (1'); Front and rear positioning components, used for positioning two saddle casting blanks (1') that are centrally symmetrically arranged face to face within the frame body, and capable of preventing the saddle casting blanks (1') from moving forward and backward during turning; Left and right positioning components, used for positioning two saddle casting blanks (1') that are face-to-face and centrally symmetrically arranged in the frame body, and capable of preventing the saddle casting blanks (1') from moving left and right during turning; The front and rear positioning components include an inner limiting structure and an outer pressing screw (8), wherein the inner limiting structure is arranged on the inner side wall of the mounting ring disk (1) and is capable of contacting and limiting the front side wall (104') of the saddle casting blank (1'); a plurality of the outer pressing screws (8) are threadedly connected to the outer ring disk (2), and the inner ends of the outer pressing screws (8) are pressed against the rear side wall of the saddle casting blank (1'); The inner limiting structure comprises a plurality of inner limiting top screws (7), the inner limiting top screws (7) being threadedly connected to the mounting ring disk (1), and the inner ends of the inner limiting top screws (7) contact and limit the front side wall (104'); The number of the left and right positioning components is two groups, and the two groups of the left and right positioning components are symmetrically arranged about the axis of the mounting ring disk (1), and respectively perform left and right positioning on the two saddle casting blanks (1'); the left and right positioning components include an inner baffle (4) and a right-angle clamping plate (5), the inner baffle (4) is arranged perpendicular to the flat clamping plate (3) and its two ends are respectively fixedly connected to the inner side walls of the mounting ring disk (1) and the outer ring disk (2), and the inner baffle (4) limits the edge end face (105') of the saddle casting blank (1'); a guide slot (301) is centrally provided at both ends of the flat clamping plate (3), and the right-angle clamping plate (5) is installed on the opposite side of the inner baffle (4) through a clamping bolt (10) and clamps and positions the other end face of the saddle casting blank (1').

2. The load-bearing saddle turning tool according to claim 1, characterized in that: A lock nut is threadedly connected to the inner limit screw (7), and the lock nut is tightly attached to the inner side wall of the mounting ring disk (1).

3. The load-bearing saddle turning tool according to claim 1, characterized in that: A pad head (501) is provided at the top end of the right-angle pressing plate (5), and the pad head (501) is clamped between the bottom surfaces (103') of the two saddle casting blanks (1').

4. The load-bearing saddle turning tool according to claim 1, characterized in that: The mounting ring disc (1) and the outer ring disc (2) are provided with limited shallow grooves at the mounting positions of the flat clamping plate (3), and each connection position is connected together by a plurality of locking screws (6).

5. The load-bearing saddle turning tool according to claim 1, characterized in that: The outer periphery of the mounting ring disk (1) is provided with mounting slots (101), and the four mounting slots (101) are evenly distributed on the outer edge of the mounting ring disk (1); the mounting ring disk (1) is coaxially fixedly connected to the adapter disk on the lathe through the mounting slots (101).

6. The load-bearing saddle turning tool according to claim 1, characterized in that: A detection notch (201) is provided on the edge of the center hole of the outer ring disk (2), and two detection notches (201) are centrally symmetrically arranged at the edge of the center hole of the outer ring disk (2).

7. A method for turning a load-bearing saddle, characterized in that: The loading saddle turning tool according to any one of claims 1 to 6 is used to turn the finishing arc surface (101') of the saddle casting blank (1'), comprising the following steps: Step 1: Preparation: Install the bearing saddle turning fixture coaxially on the main spindle chuck of the lathe, install the adapter plate on the main spindle chuck, and connect the adapter plate to the mounting ring plate (1); Step 2: Clamping the workpieces, inserting two saddle casting blanks (1') with their top surfaces (102') and bottom surfaces (103') preliminarily processed into the frame body in sequence, and arranging the two saddle casting blanks (1') face to face and coaxially; clamping and positioning the two saddle casting blanks (1') by adjusting the front and rear positioning components and the left and right positioning components; Step 3: Turning: Start the lathe and use the turning tool to synchronously process the finishing arc surfaces (101') of the two saddle castings (1').

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