Rollaway nest turning treatment device suitable for thin-wall bearing ring machining

Abstract

The invention discloses a raceway turning treatment device suitable for machining a thin-wall bearing ring, which aims at the turning action of a raceway in the bearing ring and particularly improves the action process of a turning wheel by taking an outer tightening roller as an outer clamping structure of the bearing ring and taking the turning wheel as a basic structure for executing the turning action. The turning wheel performs directional constant-speed rotation through the connecting frame on the basis of executing turning action, the essence of the turning wheel is that the outer tightening roller and the turning wheel form an inner and outer two-way supporting structure, the vertically-distributed contact sliding blocks are arranged on the basis of the arrangement position of the connecting frame, and when the connecting frame performs directional rotation, the turning wheel and the contact sliding blocks form a cross-shaped supporting area; the free deformation process of the spring frame can also serve as a vibration bearing structure, the synchronous contraction / reset process of the contact sliding block can serve as the energy absorption and release process caused by vibration, and the situation that the turning process is affected by the vibration process is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of turning devices, and in particular to a raceway turning device suitable for machining thin-walled bearing rings. Background Art

[0002] Processing thin-walled bearing rings requires sophisticated process planning, including determining cutting parameters, selecting suitable tools and fixtures, and establishing a strict processing sequence. Please refer to the relevant content in publication number CN104385025A.

[0003] Special attention should be paid to preventing deformation and vibration during the processing. The turning process of the inner wall raceway is used as an example to illustrate. During the processing, the stability of the workpiece clamping position must be ensured first. However, the clamping process may cause local deformation of the thin-walled bearing ring, and the mechanical vibration generated by the processing will directly affect the processing accuracy. Specifically, because the raceway on the inner wall of the bearing ring is a key structure that affects the sliding quality of the ball, and the raceway is a closed-loop structure, if the curvature of the annular raceway obtained after actual processing deviates from the processing requirements due to problems such as mechanical vibration.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide a raceway turning processing device suitable for thin-walled bearing ring processing, which is aimed at the processing process of the raceway inside the bearing ring. Because the mechanical vibration that may be generated during the processing may cause the annular raceway curvature obtained after actual processing to deviate from the processing requirements, which directly affects the subsequent assembly and use process.

[0006] The object of the present invention can be achieved by the following technical scheme: a raceway turning processing device suitable for processing thin-walled bearing rings, comprising a driving assembly and a bearing ring, wherein a connecting frame and a bottom support plate are respectively arranged at the inner position and the surface position of the bearing ring, wherein the connecting frame performs a rotation action and a linear movement action through the driving assembly, wherein the connecting frame and the bottom support plate both comprise a first shifting bar, a second shifting bar, a central gear and a first motor;

[0007] The first and second levers in the bottom support plate are provided with outer tightening rollers, and the first and second levers in the connecting frame are provided with turning wheels. The outer tightening rollers are provided on the outer wall of the bearing ring, and the bearing ring is tightened by the outer tightening rollers. The turning wheel is provided on the inner wall of the bearing ring, and the bearing ring is turned by the turning wheel.

[0008] It is further configured as follows: the first and second strips are slidably connected in the bottom support plate and the connecting frame along the diameter direction of the bearing ring, the first and second strips located in the bottom support plate are Y-shaped, and the outer tightening roller is rotatably connected at the end positions of the first and second strips.

[0009] It is further configured as follows: the central gear is located at the center point of the connecting frame and the bottom support plate, the first shift bar, the second shift bar and the central gear are meshed, and the first shift bar and the second shift bar have opposite sliding directions.

[0010] It is further configured that: a second motor is installed at the end positions of the first and second levers in the connection frame, and the turning wheel is rotationally connected to the first and second levers through the second motor.

[0011] It is further configured as follows: an outer rotating block is rotatably mounted on the outer position of the connecting frame, and the setting direction of the outer rotating block is perpendicular to the setting direction of the connecting frame.

[0012] It is further configured as follows: an auxiliary gear is rotatably installed at the center point of the central gear in the connecting frame, and directional gears are rotatably installed on both sides of the connecting frame corresponding to the auxiliary gear, the directional gear is meshed with the auxiliary gear and the inner wall of the outer rotating block, and a third motor corresponding to the auxiliary gear is installed in the connecting frame.

[0013] It is further configured as follows: a bidirectional spring frame is installed at an outer position of the outer rotating block, a contact slider is installed at an end position of the bidirectional spring frame, and the setting position of the contact slider matches the setting position of the turning wheel.

[0014] It is further configured as follows: a connecting slide rod is installed between the outer rotating block and the contact slide block.

[0015] It is further configured that: the rotation point position of the outer rotating block and the connecting frame and the center point of the directional gear are on the same vertical axis.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention is directed to the turning process of the raceway in the bearing ring, specifically, the turning wheel is used as the basic structure of the turning action, and the outer clamping roller is used as the clamping process in the turning action. Based on this, the turning wheel is driven by the driving assembly to perform directional and uniform rotation. In the turning process, the outer clamping roller provides an external support force to the bearing ring, and the turning wheel provides an internal support force on the basis of performing the turning action, thereby forming an internal and external bidirectional support structure. In order to maintain the internal force balance of the bearing ring, firstly, it is ensured that the two turning wheels are arranged along the diameter direction of the bearing ring. In the directional and uniform rotation action of the matching connection frame, the turning wheel can perform full annular support on the entire bearing ring on the basis of performing the turning action;

[0018] 2. Based on the above content, in combination with the setting position of the turning wheel, a contact slider perpendicular to the turning wheel is further set. The two turning wheels and the two contact sliders form a cross support structure, and when the contact slider is directional rotated in the connection frame, the bidirectional spring frame therein is freely deformed relative to the reaction force between the contact slider and the bearing ring. On the basis that the turning wheel changes the turning radius synchronously through the first shift bar and the second shift bar, on the one hand, the contact slider is used to synchronously maintain the cross support structure, thereby maintaining the force level during the turning of the bearing ring. The key purpose is: in the vibration problem that may occur during the real-time turning process of the bearing ring, the free deformation process of the bidirectional spring frame can also be used as a vibration "bearing structure", and through the synchronous contraction / reset process of the contact slider, it can be used as an energy absorption and release process due to vibration, thereby avoiding the vibration process affecting the turning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of a raceway turning device suitable for machining thin-walled bearing rings proposed by the present invention;

[0021] Figure 2 This is a schematic structural diagram of a bottom support plate in a raceway turning device suitable for machining thin-walled bearing rings proposed by the present invention;

[0022] Figure 3 The invention provides a roller turning processing device suitable for thin-walled bearing ring processing. Figure 2 sectional view of

[0023] Figure 4 It is a structural schematic diagram of a turning assembly in a raceway turning processing device suitable for machining thin-walled bearing rings proposed by the present invention;

[0024] Figure 5 The invention proposes a roller turning processing device suitable for thin-walled bearing ring processing Figure 4 A cutaway view of the middle connection frame;

[0025] Figure 6 The invention provides a roller turning processing device suitable for thin-walled bearing ring processing. Figure 4 A top view of

[0026] Figure 7This is a schematic structural diagram of a first shifting bar and a second shifting bar in a raceway turning device suitable for machining thin-walled bearing rings proposed by the present invention.

[0027] In the figure: 1. bottom support plate; 2. drive assembly; 3. connection frame; 4. outer tightening roller; 5. first shifting bar; 6. center gear; 7. first motor; 8. second shifting bar; 9. second motor; 10. turning wheel; 11. outer rotating block; 12. bidirectional spring frame; 13. contact slider; 14. third motor; 15. auxiliary gear; 16. connecting slide rod; 17. directional gear. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1: This is a process for processing the inner raceway of a bearing ring. Due to the mechanical vibration that may be generated during the processing, the curvature of the annular raceway obtained after actual processing deviates from the processing requirements, which directly affects the subsequent assembly and use process. The following technical solutions are proposed:

[0030] Reference Figures 1 to 7 The raceway turning processing device suitable for processing thin-walled bearing rings in this embodiment includes a driving assembly 2 and a bearing ring. A connecting frame 3 and a bottom support plate 1 are respectively arranged at the inner position and the surface position of the bearing ring. The connecting frame 3 performs a rotation action and a linear movement action through the driving assembly 2. The connecting frame 3 and the bottom support plate 1 both include a first shift bar 5, a second shift bar 8, a central gear 6 and a first motor 7;

[0031] The first and second bars 5 and 8 in the bottom support plate 1 are provided with outer tightening rollers 4, and the first and second bars 5 and 8 in the connection frame 3 are provided with turning wheels 10. The outer tightening rollers 4 are provided on the outer wall of the bearing ring, and the outer tightening rollers 4 are used to tighten the bearing ring.

[0032] The turning wheel 10 is located on the inner wall of the bearing ring, and the turning wheel 10 performs turning on the bearing ring. The first strip 5 and the second strip 8 are slidingly connected in the bottom support plate 1 and the connecting frame 3 along the diameter direction of the bearing ring. The first strip 5 and the second strip 8 located in the bottom support plate 1 are Y-shaped, and the outer tightening roller 4 is rotationally connected at the end position of the first strip 5 and the second strip 8.

[0033] Working principle: Refer to Figure 1 and Figure 2To explain, since the turning process of the raceway is mainly located at the inner wall of the bearing ring, during the processing, the bearing ring to be processed is placed on the bottom support plate 1, and the first motor 7 on the bottom support plate 1 is started to drive the central gear 6 to rotate in a directional manner;

[0034] The meshing relationship between the first and second levers 5 and 8 and the central gear 6 drives the first and second levers 5 and 8 to slide synchronously, ensuring that the outer tightening rollers 4 on the first and second levers 5 and 8 are close to the outer position of the bearing ring at the same time, so as to directly clamp the bearing ring through the outer tightening rollers 4;

[0035] The connecting frame 3 mainly performs two actions, rotation and linear movement, through the driving assembly. For details, please refer to the head assembly in the CNC center. Specifically, after the turning wheel 10 is moved to the appropriate position inside the bearing ring, the first motor 7 in the connecting frame 3 is started to drive the first and second shifting bars 5 and 8 to slide synchronously. The difference from the bottom support plate 2 is that:

[0036] It is necessary to ensure that the first and second shifting bars 5 and 8 are moved away at the same time, so that the turning wheel 10 contacts the inner wall of the bearing ring synchronously, and the second motor 9 drives the turning wheel 10 to rotate continuously to perform turning;

[0037] In combination with the above content, it is explained again that according to the turning process parameters, the driving assembly 2 drives the integral connecting frame 3 to rotate at a uniform speed in a directional manner, and when the turning wheel 10 continues to perform the turning action, the first motor 7 therein synchronously drives the first shifting bar 5 and the second shifting bar 8 to perform the principle, the purpose of which is to continuously change the turning parameters, and it is necessary to explain in this process that:

[0038] During the overall process, the bearing ring is fixedly clamped in four positions by four outer tightening rollers 4, and the setting direction of two of the turning wheels 10 is parallel to the diameter direction of the bearing ring. When the overall connecting frame 3 maintains directional uniform rotation, the turning position of the overall bearing ring always remains opposite, and is turned in a continuous ring shape, so that the turning position of the bearing ring always obtains the external support action from the outer tightening rollers 4 and the internal support action from the turning wheel 10, avoiding the problem of small deformation or processing accuracy deviation at the local position of the bearing ring during the overall turning process.

[0039] Embodiment 2: Based on the technical content in Embodiment 1, the overall turning process is explained:

[0040] The central gear 6 is located at the center point of the connecting frame 3 and the bottom support plate 1, the first and second levers 5 and 8 are meshed with the central gear 6, and the sliding directions of the first and second levers 5 and 8 are opposite, and the second motor 9 is installed at the end positions of the first and second levers 5 and 8 in the connecting frame 3, and the turning wheel 10 is connected to the first and second levers 5 and 8 for rotation through the second motor 9;

[0041] An outer rotating block 11 is rotatably mounted on the outer position of the connecting frame 3, and the setting direction of the outer rotating block 11 is perpendicular to the setting direction of the connecting frame 3. An auxiliary gear 15 is rotatably mounted at the center point of the central gear 6 in the connecting frame 3, and directional gears 17 are rotatably mounted on the two sides of the connecting frame 3 corresponding to the auxiliary gear 15. The directional gear 17 is meshed with the auxiliary gear 15 and the inner wall of the outer rotating block 11.

[0042] A third motor 14 corresponding to the auxiliary gear 15 is installed in the connecting frame 3, a bidirectional spring frame 12 is installed at the external position of the outer rotating block 11, a contact slider 13 is installed at the end position of the bidirectional spring frame 12, the setting position of the contact slider 13 matches the setting position of the turning wheel 10, a connecting slide bar 16 is installed between the outer rotating block 11 and the contact slider 13, and the rotation point position of the outer rotating block 11 and the connecting frame 3 and the center point of the directional gear 17 are on the same vertical axis.

[0043] Solution description: Based on the first embodiment, when the integral connection frame 3 is placed inside the bearing ring, the linear distance between the contact slider 13 and the center point of the bearing ring is smaller than the radius of the bearing ring. However, when the turning action is continued, the directional gear 14 is started synchronously, and firstly drives the auxiliary gear 15 to perform directional rotation independently of the central gear 6;

[0044] First, the directional gears 17 on both sides are driven to rotate synchronously. Secondly, the meshing relationship between the directional gears 17 and the outer rotating block 11 ensures that the outer rotating block 11 rotates adaptively. It should be noted that the outer rotating block 11 does not use the center point of the bearing ring as the rotation point. The specific purpose is to ensure that the outer rotating block 11 rotates eccentrically based on the bearing ring, and to ensure that the contact slider 13 continuously contacts the raceway of the inner wall of the bearing ring during the eccentric rotation of the outer rotating block 11.

[0045] On the basis that the turning wheel 10 turns the inner wall of the bearing ring, the contact slider 13 also supports the inner wall of the bearing ring, and it is necessary to further ensure that the outer curved surface of the contact slider 13 matches the outer curved surface of the turning wheel 10, so it can be understood that: in the overall turning process, the two turning wheels 10 and the two contact sliders 13 form a cross support structure. Assuming that the overall connection frame 3 is in a stationary state, the overall bearing ring forms a cross support area through the two turning wheels 10 and the two contact sliders 13;

[0046] Therefore, when the connecting frame 3 continues to rotate, it is ensured that the entire bearing ring is uniformly subjected to the internal support force provided by the turning wheel 10 and the contact slider 13, and is synchronously subjected to the external support force from the outer tightening roller 4, so as to avoid the local position of the bearing ring from deforming inwards due to the clamping force of the outer tightening roller 4 during the processing. The key is the turning action of the turning wheel 10. During the turning action of the turning wheel 10 and the synchronous sliding process of the first and second shifting bars 5 and 8, it is further avoided that the difference in the internal support force caused by the turning wheel 10 on the bearing ring causes a slight deviation in the raceway after turning, thereby affecting the subsequent assembly process.

[0047] It should also be noted that the linear distance between the contact slider 13 and the center point of the bearing ring is adaptively changed by the bidirectional spring bracket 12, which is specifically manifested as follows: when the contact slider 13 first contacts the inner wall of the bearing ring, and when the outer rotating block 11 continues to rotate, the linear distance between the contact slider 13 and the center point of the bearing ring is essentially shortened;

[0048] In this process, the bearing ring will generate a reaction force on the contact slider 13, and the reaction force directly acts on the two-way spring frame 12. The two-way spring frame 12 undergoes free deformation to maintain the distance between the contact slider 13 and the center point of the bearing ring. The purpose is to ensure that the two turning wheels 10 and the two contact sliders 13 maintain a cross support structure, and the connecting slide rod 16 is mainly used to ensure the moving distance of the contact slider relative to the outer rotating block 11.

[0049] In summary: for the turning action of the raceway in the bearing ring, the outer clamping roller is used as the outer clamping structure of the bearing ring, and the turning wheel is used as the basic structure for performing the turning action. Specifically, the action process of the turning wheel is improved. The turning wheel is rotated at a uniform speed through a connecting frame on the basis of performing the turning action. Its essence is to form an inner and outer bidirectional support structure with the outer clamping roller and the turning wheel, and to set a vertically distributed contact slider based on the setting position of the connecting frame;

[0050] When the connecting frame is rotated in a directional manner, a cross-support area is formed by the turning wheel and the contact slider. The free deformation process of the spring frame can also serve as a "bearing structure" for vibration. Through the synchronous contraction / reset process of the contact slider, it can be used as an absorption and release process of energy caused by vibration, thereby preventing the vibration process from affecting the turning process.

[0051] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A raceway turning device suitable for machining thin-walled bearing rings, comprising a drive assembly (2) and a bearing ring, characterized in that: A connecting frame (3) and a bottom support plate (1) are respectively arranged at the inner position and the surface position of the bearing ring, the connecting frame (3) performs a rotational motion and a linear movement motion through a driving assembly (2), and the connecting frame (3) and the bottom support plate (1) both include a first shifting bar (5), a second shifting bar (8), a central gear (6) and a first motor (7); An outer tightening roller (4) is arranged on the first and second pull bars (5) and (8) in the bottom support plate (1); a turning wheel (10) is arranged on the first and second pull bars (5) and (8) in the connection frame (3); the outer tightening roller (4) is arranged on the outer wall of the bearing ring, and the outer tightening roller (4) performs a tightening action on the bearing ring; the turning wheel (10) is arranged on the inner wall of the bearing ring, and the turning wheel (10) performs a turning action on the bearing ring.

2. The raceway turning device suitable for machining thin-walled bearing rings according to claim 1, characterized in that: The first strip (5) and the second strip (8) are slidably connected in the bottom support plate (1) and the connection frame (3) along the diameter direction of the bearing ring; the first strip (5) and the second strip (8) located in the bottom support plate (1) are Y-shaped; and the outer tightening roller (4) is rotatably connected at the end positions of the first strip (5) and the second strip (8).

3. The raceway turning device suitable for machining thin-walled bearing rings according to claim 1, characterized in that: The central gear (6) is located at the center point of the connecting frame (3) and the bottom support plate (1); the first shift bar (5), the second shift bar (8) and the central gear (6) are meshed with each other, and the sliding directions of the first shift bar (5) and the second shift bar (8) are opposite.

4. The raceway turning device suitable for machining thin-walled bearing rings according to claim 1, characterized in that: A second motor (9) is installed at the end positions of the first and second levers (5) and (8) in the connection frame (3), and the turning wheel (10) is rotationally connected to the first and second levers (5) and (8) via the second motor (9).

5. The raceway turning device suitable for machining thin-walled bearing rings according to claim 4, characterized in that: An outer rotating block (11) is rotatably mounted on an outer position of the connecting frame (3), and the setting direction of the outer rotating block (11) is perpendicular to the setting direction of the connecting frame (3).

6. The raceway turning device suitable for machining thin-walled bearing rings according to claim 5, characterized in that: An auxiliary gear (15) is rotatably mounted at the center point of the central gear (6) in the connection frame (3), and directional gears (17) are rotatably mounted at positions on both sides of the connection frame (3) corresponding to the auxiliary gear (15). The directional gears (17) are meshed with the auxiliary gear (15) and the inner wall of the outer rotating block (11), and a third motor (14) corresponding to the auxiliary gear (15) is mounted in the connection frame (3).

7. The raceway turning device suitable for machining thin-walled bearing rings according to claim 5, characterized in that: A bidirectional spring frame (12) is installed at an outer position of the outer rotating block (11), and a contact slider (13) is installed at an end position of the bidirectional spring frame (12). The setting position of the contact slider (13) matches the setting position of the turning wheel (10).

8. The raceway turning device suitable for machining thin-walled bearing rings according to claim 7, characterized in that: A connecting slide bar (16) is installed between the outer rotating block (11) and the contact slide block (13).

9. The raceway turning device suitable for machining thin-walled bearing rings according to claim 5, characterized in that: The rotation point position of the outer rotating block (11) and the connecting frame (3) and the center point of the directional gear (17) are located on the same vertical axis.

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