Surface treatment device for composite brake drum

Abstract

The invention relates to the technical field of automobile part machining, in particular to a surface treatment device for a composite brake drum, the surface treatment device for the composite brake drum comprises a machine base, a first clamping part, a second clamping part, a rotating shaft, a grinding disc and an adjusting assembly, the first clamping part is arranged on the machine base and used for clamping the composite brake drum in the circumferential direction; the first clamping part can rotate around a first axis; the second clamping part is movably arranged on the machine base, can move in the direction close to or away from the first clamping part relative to the first clamping part and is used for clamping the composite brake drum in the circumferential direction. The rotating shaft is inserted into the second clamping part and can rotate around the axis of the rotating shaft; the rotating shaft and the second clamping part can be switched between movable connection and fixed connection; the grinding disc can rotate around the axis of the grinding disc and is used for grinding the composite brake drum. The adjusting assembly is used for adjusting the position of the rotating shaft so that the axis of the rotating shaft can coincide with the first axis, and therefore the grinding effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to a surface treatment device for a composite brake drum. Background Art

[0002] In recent years, with the development of the automobile industry, traditional all-cast iron brake drums have gradually been replaced by composite brake drums due to their easy cracking and short life. Composite brake drums are an automotive brake component that combines different materials together to improve its performance. Its main advantage is that it combines the characteristics of multiple materials and has advantages such as high strength, high toughness, wear resistance and thermal fatigue resistance.

[0003] In the process of composite brake drum production, in order to ensure the surface quality of the composite brake drum, it is necessary to grind the inner and outer circumferential walls of the composite brake drum, and grinding equipment is required for grinding. In the related technology, for example, Chinese patent CN217750696U discloses a grinding device for automobile brake drums, which places the brake drum body on the top of the support base, places the inner grinding rod inside the brake drum body, and places the outer grinding rod on the outer wall of the brake drum body. When the servo motor is started to drive the rotating shaft to rotate, the four transmission rods are driven to rotate, and the scraper rod rotates in contact with the brake drum body to grind the outer and inner walls of the brake drum body, thereby achieving the effect of single-time double-sided grinding to improve the grinding efficiency.

[0004] When grinding the outer circumferential wall of the composite brake drum, the existing grinding equipment needs to use a clamping assembly to clamp and fix the outer circumferential wall of the composite brake drum, resulting in the clamped part of the composite brake drum being unable to be ground. In order to ensure the grinding efficiency, a clamping assembly is often provided on the opposite side of the composite brake drum, and the clamping assembly is used to clamp and fix the already ground outer circumferential wall of the composite brake drum, thereby completing the complete grinding of the outer circumferential wall of the composite brake drum. However, in this process, due to the processing error and clamping error of the clamping assembly, the centers of the two clampings cannot be accurately coaxial. Once such a coaxiality deviation occurs, it will not only affect the stability of the clamping, causing the composite brake drum to slightly shake during the grinding process, but also affect the grinding effect, resulting in uneven grinding of the composite brake drum. Summary of the invention

[0005] Based on this, it is necessary to provide a surface treatment device for a composite brake drum to address the problem of poor grinding effect of the outer peripheral wall of the composite brake drum during the grinding process.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A surface treatment device for a composite brake drum, the surface treatment device for a composite brake drum comprising:

[0008] Machine base;

[0009] A first clamping portion is disposed on the machine base and is configured to clamp the outer peripheral wall of the composite brake drum along the circumferential direction; the first clamping portion has a first axis and is rotatable around the first axis;

[0010] A second clamping portion is movably disposed on the base and is movable relative to the first clamping portion in a direction of approaching or moving away from each other, and is configured to clamp the outer peripheral wall of the composite brake drum in a circumferential direction;

[0011] A rotating shaft is inserted into the second clamping part and can rotate around its own axis; the rotating shaft has a first state and a second state. When in the first state, the rotating shaft and the base and the second clamping part are all movably connected; when in the second state, the rotating shaft and the second clamping part are fixedly connected and can only rotate around its own axis relative to the base;

[0012] A grinding disc, which is arranged on the machine base and can rotate around its own axis and can slide relative to the first clamping portion in the direction of extension of the first axis, so as to grind the outer peripheral wall of the composite brake drum;

[0013] An adjustment component is configured to adjust the position of the rotating shaft so that the axis of the rotating shaft coincides with the first axis.

[0014] Furthermore, the adjustment component includes a rotating disk and a damping part, the rotating disk is arranged on the machine base, and when the rotating shaft is in the first state, the rotating disk can rotate around its own axis; when the rotating shaft is in the second state, the rotating disk and the machine base are fixedly connected; a sliding hole is opened on the disk surface of the rotating disk, and the trajectory shape of the sliding hole is a spiral line; the rotating shaft is inserted into the sliding hole and can move along the sliding hole; the damping part is configured to hinder the movement of the rotating shaft.

[0015] Furthermore, the damping part includes an elastic member, which is inserted into the sliding hole and connected between the rotating shaft and the rotating disk.

[0016] Furthermore, the elastic member is configured as a compression spring.

[0017] Furthermore, the surface treatment device for the composite brake drum also includes a plurality of balls, which are all inserted on the base and can roll freely, so that a rolling fit is formed between the rotating disk and the base.

[0018] Furthermore, the rotating shaft and the base and the second clamping portion are all connected by closable magnetic connections to switch the state of the rotating shaft.

[0019] Furthermore, the surface treatment device for a composite brake drum further comprises a driving assembly, and the driving assembly is configured to provide a driving force for rotating the rotating shaft.

[0020] Furthermore, the driving assembly includes a first driving motor and a connecting member, wherein the first driving motor is arranged on the machine base; and the connecting member is connected between the first driving motor and the rotating shaft.

[0021] Furthermore, the connecting member is configured as a cross slider coupling.

[0022] Furthermore, the first clamping portion and / or the second clamping portion is configured as a three-jaw chuck.

[0023] The beneficial effects of the present invention are:

[0024] The surface treatment device for a composite brake drum disclosed by the present invention first clamps the outer peripheral wall of the composite brake drum along the circumferential direction through the first clamping part during use, and then drives the grinding disc to rotate around its own axis while driving the grinding disc to slide relative to the first clamping part in the direction of extension of the first axis, so as to grind a part of the outer peripheral wall of the composite brake drum; after the grinding is completed, the first clamping part is driven to rotate around the first axis while driving the first clamping part to move relative to the second clamping part in the direction of approaching each other, and at the same time, the outer peripheral wall of the composite brake drum is clamped along the circumferential direction through the second clamping part. Due to the movable arrangement of the second clamping part, the second clamping part can move relative to the first clamping part during the process of clamping the outer peripheral wall of the composite brake drum, and at the same time drive the rotating shaft to move relative to the first clamping part; when the second clamping part clamps the outer peripheral wall of the composite brake drum along the circumferential direction, the first clamping part drives the second clamping part and the rotating shaft to rotate simultaneously through the composite brake drum, and then, under the action of the adjusting component, the rotating shaft is adjusted The position of the shaft is set so that the axis of the rotating shaft coincides with the first axis, thereby eliminating the problem of the non-coaxial clamping center caused by the two clampings, so that the composite brake drum can be firmly clamped during the entire grinding process; then the rotating shaft is switched to the second state, so that the rotating shaft and the second clamping part are fixedly connected, and then the first clamping part is stopped from rotating around the first axis, and the clamping of the outer peripheral wall of the composite brake drum is released, and then the first clamping part is driven to move relative to the second clamping part in a direction away from each other, and then the rotating shaft is driven to rotate around its own axis, and the rotating shaft drives the composite brake drum to rotate through the second clamping part, and then the grinding disc is driven to rotate around its own axis while driving the grinding disc to slide relative to the first clamping part in the direction of extension of the first axis to grind another part of the outer peripheral wall of the composite brake drum; by setting the coaxiality of the clamping center during the two grinding processes, while ensuring that the contact between the grinding disc and the outer peripheral wall of the composite brake drum is more uniform and stable, the grinding effect is effectively improved, and the quality of the surface treatment of the composite brake drum is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of the surface treatment device for a composite brake drum provided by an embodiment of the present invention when grinding a composite brake drum;

[0026] Figure 2 A schematic diagram of the parts decomposition of the surface treatment device for a composite brake drum provided by an embodiment of the present invention when grinding a composite brake drum;

[0027] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 4 A schematic side view of the structure of the surface treatment device for a composite brake drum provided by an embodiment of the present invention when grinding a composite brake drum;

[0029] Figure 5 for Figure 4 Middle BB section view;

[0030] Figure 6 for Figure 5 Schematic diagram of the partial enlarged structure at point C in the middle.

[0031] in:

[0032] 1. Machine base; 101. Bottom cylinder; 102. Sliding rod; 103. Second driving motor; 104. Support rod; 105. Driving cylinder; 106. Third driving motor; 107. Support ring; 108. Columnar cavity;

[0033] 2. A first clamping portion;

[0034] 3. A second clamping portion;

[0035] 4. Rotating shaft; 401. Mounting ring;

[0036] 5. Grinding disc;

[0037] 6. Adjustment assembly; 601. Rotating plate; 6011. Sliding hole; 602. Damping part; 6021. Compression spring; 6022. Stopper;

[0038] 7. Ball bearing;

[0039] 8. Driving assembly; 801. first driving motor; 802. cross slider coupling; 8021. lower plate; 8022. middle plate; 8023. upper plate;

[0040] 9. Composite brake drum. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] like Figures 1 to 6 As shown, the surface treatment device for a composite brake drum provided in an embodiment of the present invention is used for grinding the outer peripheral wall of a composite brake drum 9, and is arranged to include a machine base 1, a first clamping portion 2, a second clamping portion 3, a rotating shaft 4, a grinding disc 5 and an adjusting assembly 6, wherein the first clamping portion 2 is arranged on the machine base 1, and is configured to be able to clamp the outer peripheral wall of the composite brake drum 9 along the circumferential direction; the first clamping portion 2 has a first axis and can rotate around the first axis; the second clamping portion 3 is movably arranged on the machine base 1, and can move relative to the first clamping portion 2 in a direction close to or away from each other, and is configured to be able to clamp the outer peripheral wall of the composite brake drum 9 along the circumferential direction; the rotating shaft 4 The shaft 4 is inserted into the second clamping part 3 and can rotate around its own axis; the rotating shaft 4 has a first state and a second state. When in the first state, the rotating shaft 4 and the machine base 1 and the second clamping part 3 are all movably connected; when in the second state, the rotating shaft 4 and the second clamping part 3 are fixedly connected, and can only rotate around its own axis relative to the machine base 1; the grinding disc 5 is arranged on the machine base 1, and can rotate around its own axis, and can slide relative to the first clamping part 2 in the direction of extension of the first axis, so as to be able to grind the outer peripheral wall of the composite brake drum 9; the adjusting component 6 is configured to be able to adjust the position of the rotating shaft 4 so that the axis of the rotating shaft 4 coincides with the first axis.

[0045] Specifically in this embodiment, Figure 1As shown, the base 1 is configured as a flat plate structure, and the plate surface is configured horizontally when in use; the first clamping portion 2 and the second clamping portion 3 are arranged at intervals in the vertical direction, and the first clamping portion 2 is located above the second clamping portion 3; in order to facilitate the installation of the first clamping portion 2 and enable the first clamping portion 2 and the second clamping portion 3 to move relatively in the direction away from or close to each other, two bottom cylinders 101 are vertically configured on the top of the base 1, and the bottom cylinder 101 is configured as a square cylinder structure. The two bottom cylinders 101 are arranged at intervals in the width direction of the base 1, and a sliding rod 102 is inserted into the top of the two bottom cylinders 101, and the sliding rod 102 is configured as a square rod structure. , and is composed of a top branch rod and two side branch rods, the top branch rod is horizontally arranged and extends along the width direction of the machine base 1, the two side branch rods are respectively vertically arranged at the bottom of both ends of the top branch rod, and are respectively slidably inserted in the two bottom cylinders 101 to synchronously drive the first clamping part 2 to move relative to the second clamping part 3 in the direction of approaching or moving away from each other; a second drive motor 103 is arranged in the middle of the top of the top branch rod, the motor shaft of the second drive motor 103 is arranged downward in the vertical direction, and is fixedly inserted at the top of the first clamping part 2, and the first axis and the axis of the second drive motor 103 coincide, so as to drive the first clamping part 2 to rotate around the first axis.

[0046] It can be understood that the driving force for the sliding of the sliding rod 102 can be provided by air pressure, hydraulic pressure or electric power, wherein when the driving force for the sliding of the sliding rod 102 is provided by air pressure, the bottom cylinder 101 and the sliding rod 102 together form a pneumatic cylinder-like structure; when the driving force for the sliding of the sliding rod 102 is provided by hydraulic pressure, the bottom cylinder 101 and the sliding rod 102 together form a hydraulic cylinder-like structure; when the driving force for the sliding of the sliding rod 102 is provided by electric power, the bottom cylinder 101 and the sliding rod 102 together form an electric cylinder-like structure.

[0047] like Figure 5 As shown, in order to facilitate the placement of the rotating shaft 4, a support ring 107 is arranged on the top of the machine base 1, the annular surface of the support ring 107 is arranged horizontally, and the support ring 107 is composed of a first sub-ring, a second sub-ring, a third sub-ring and a fourth sub-ring arranged in sequence from top to bottom, and the inner diameter of the first sub-ring is larger than the inner diameter of the second sub-ring, the inner diameter of the second sub-ring is larger than the inner diameter of the third sub-ring, the inner circumferential wall of the fourth sub-ring is a conical ring surface, and the small end is arranged on the top, and the minimum inner diameter of the fourth sub-ring is larger than the inner diameter of the first sub-ring; a cylindrical cavity 108 is opened in the machine base 1, the axis of the cylindrical cavity 108 is arranged vertically, and coincides with the axis of the support ring 107, and is connected to the support ring 107; when installing, the axis of the rotating shaft 4 is arranged vertically, and coincides with the axis of the support ring 107, the bottom end of the rotating shaft 4 is suspended and inserted in the cylindrical cavity 108, the top end passes through the support ring 107, and is inserted at the bottom of the second clamping part 3; as shown Figure 6As shown, a bearing is rotatably sleeved on the rotating shaft 4, and a mounting ring 401 is sleeved outside the bearing. The mounting ring 401 abuts against the top of the third sub-ring, and a flower key is coaxially arranged on the top of the rotating shaft 4. A mounting groove is opened at the bottom of the second clamping part 3, and the mounting groove is arranged as a T-shaped columnar structure. When the rotating shaft 4 is installed, the flower key is movably inserted into the mounting groove; the second clamping part 3 is located above the support ring 107.

[0048] like Figure 1 As shown, the grinding disc 5 is arranged horizontally when in use; in order to facilitate the installation of the grinding disc 5 and enable the grinding disc 5 to slide relative to the first clamping portion 2 in the direction of extension of the first axis, a support rod 104 is arranged on the top of the machine base 1, and the support rod 104 is arranged in a C-shaped structure with the notch facing the machine base 1, and a driving cylinder 105 is arranged in the middle of the top of the support rod 104, and the output shaft of the driving cylinder 105 is arranged downward in the vertical direction, and is coaxially inserted in the grinding disc 5, and can rotate relative to the grinding disc 5, and a third driving motor 106 is also arranged on the top of the machine base 1, the third driving motor 106 is located below the support rod 104, and the motor shaft of the third driving motor 106 is arranged upward in the vertical direction, and is coaxially inserted in the grinding disc 5, and forms a spline fit with the grinding disc 5, so that the grinding disc 5 can slide relative to the third driving motor 106 in the vertical direction, and can rotate relative to the driving cylinder 105.

[0049] It can be understood that the driving cylinder 105 can be configured as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0050] Initially, the rotating shaft 4 is in the first state, and the rotating shaft 4, the base 1, and the second clamping portion 3 are all movably connected.

[0051] During use, the upper half of the outer wall of the composite brake drum 9 is first clamped circumferentially by the first clamping portion 2, and then the drive cylinder 105 and the third drive motor 106 are started, wherein the third drive motor 106 drives the grinding disc 5 to rotate around its own axis, and the drive cylinder 105 drives the grinding disc 5 to move vertically and from bottom to top to grind the lower half of the outer wall of the composite brake drum 9.

[0052] After grinding is completed, the third drive motor 106 is turned off, and the grinding disc 5 is driven to move vertically from top to bottom through the drive cylinder 105 to achieve reset; then the second drive motor 103 is started, and the first clamping part 2 is driven to move vertically and downward through the sliding rod 102, wherein the second drive motor 103 drives the first clamping part 2 to rotate around the first axis; then the outer peripheral wall of the composite brake drum 9 is clamped circumferentially through the second clamping part 3. Due to mechanical errors and the movable setting of the second clamping part 3, the second clamping part 3 can move relative to the first clamping part 2 during the process of clamping the outer peripheral wall of the composite brake drum 9, and at the same time drive the rotating shaft 4 to move relative to the first clamping part 2.

[0053] When the second clamping part 3 clamps the outer wall of the composite brake drum 9 along the circumferential direction, the first clamping part 2 drives the second clamping part 3 and the rotating shaft 4 to rotate through the composite brake drum 9 at the same time, and then under the action of the adjusting component 6, the position of the rotating shaft 4 is adjusted so that the axis of the rotating shaft 4 coincides with the first axis.

[0054] Then, the rotating shaft 4 is switched to the second state, so that the rotating shaft 4 and the second clamping part 3 are fixedly connected, and the rotating shaft 4 can only rotate around its own axis relative to the machine base 1, and then the second drive motor 103 is turned off to stop the rotation of the first clamping part 2 around the first axis and release the clamping of the outer peripheral wall of the composite brake drum 9, and then the first clamping part 2 is driven by the sliding rod 102 to move upward in the vertical direction to disengage from the composite brake drum 9; then the rotating shaft 4 is driven to rotate around its own axis, and the rotating shaft 4 drives the composite brake drum 9 to rotate through the second clamping part 3, and then the drive cylinder 105 and the third drive motor 106 are started, wherein the third drive motor 106 drives the grinding disc 5 to rotate around its own axis, and the drive cylinder 105 drives the grinding disc 5 to move in the vertical direction from bottom to top to grind the upper half of the outer peripheral wall of the composite brake drum 9.

[0055] Through the above series of precise and coordinated operations, the surface treatment device for the composite brake drum can effectively solve the coaxiality deviation problem faced by the existing grinding equipment in grinding the outer peripheral wall of the composite brake drum 9, and bring many significant technical effects:

[0056] The first is the grinding stability. During the switching clamping and grinding process, the axis of the rotating shaft 4 and the first axis are accurately coincided by adjusting the component 6, which eliminates the problem of the clamping center being out of axial alignment due to the two clampings to the greatest extent. The composite brake drum 9 can be firmly clamped during the entire grinding process, which eliminates the hidden danger of slight shaking during grinding to a certain extent, ensures the smooth and continuous advancement of the grinding operation, and lays a solid foundation for high-precision grinding.

[0057] Secondly, in terms of grinding effect, the precise coaxial setting makes the contact between the grinding disc 5 and the outer wall of the composite brake drum 9 more uniform and stable, effectively avoiding the occurrence of uneven grinding; and when grinding the outer wall of any part of the composite brake drum 9, it can ensure that the grinding depth and smoothness remain highly consistent, so that the surface quality of the outer wall of the finished composite brake drum 9 is greatly improved, meeting more stringent quality standards, reducing subsequent defective product screening and rework processes, and improving overall production efficiency.

[0058] The third is the grinding efficiency. There is no need to repeatedly adjust the clamping position for fear of coaxiality deviation as in traditional equipment, which reduces unnecessary preparation time and operating steps. The entire grinding process is compact and smooth, and the grinding work of different areas of the outer wall of the composite brake drum 9 can be completed at one time, thereby greatly shortening the grinding cycle of a single composite brake drum 9.

[0059] In a further embodiment, the adjustment component 6 is configured to include a rotating disk 601 and a damping portion 602, the rotating disk 601 is arranged on the machine base 1, and when the rotating shaft 4 is in the first state, the rotating disk 601 can rotate around its own axis; when the rotating shaft 4 is in the second state, the rotating disk 601 and the machine base 1 are fixedly connected; a sliding hole 6011 is opened on the disk surface of the rotating disk 601, and the trajectory shape of the sliding hole 6011 is a spiral line; the rotating shaft 4 is inserted into the sliding hole 6011 and can move along the sliding hole 6011; the damping portion 602 is configured to be able to hinder the movement of the rotating shaft 4.

[0060] Specifically in this embodiment, Figure 5 As shown, the rotating disk 601 and the support ring 107 are coaxially arranged, the rotating disk 601 is arranged in a T-shaped structure, and the large sub-disk of the rotating disk 601 and the first sub-ring of the support ring 107 are arranged at intervals, the small sub-disk of the rotating disk 601 abuts against the top of the second sub-ring of the support ring 107, and the outer peripheral wall of the small sub-disk of the rotating disk 601 and the inner peripheral wall of the first sub-ring of the support ring 107 are arranged to overlap, so that the rotating disk 601 has a determined position; as shown in FIG. Figure 2 As shown, the sliding hole 6011 is configured as a spiral line structure extending from the inside to the outside and in a counterclockwise direction.

[0061] More specifically, the second clamping portion 3 movably abuts against the top of the rotating disk 601 so that the second clamping portion 3 has a determined position.

[0062] When the rotating shaft 4 is in different states, in order to facilitate the rotating disk 601 to have different forms of movement, the support ring 107 is set to be an electromagnet, and the rotating disk 601 is set to be made of magnetic materials, such as iron, cobalt, nickel, etc.; when the rotating shaft 4 is in the first state, the support ring 107 is in an unpowered state, so that the rotating disk 601 can rotate around its own axis; when the rotating shaft 4 is in the second state, the support ring 107 is in an energized state, at this time the rotating disk 601 is magnetically adsorbed on the support ring 107, so that the position of the rotating disk 601 is fixed, thereby avoiding affecting the overlap between the axis of the rotating shaft 4 and the first axis.

[0063] During use, when the second clamping part 3 clamps the outer wall of the composite brake drum 9 along the circumferential direction, the first clamping part 2 drives the second clamping part 3 and the rotating shaft 4 to rotate through the composite brake drum 9. At this time, the second clamping part 3 and the rotating shaft 4 both revolve around the first axis.

[0064] During the process of the rotating shaft 4 revolving around the first axis, the rotating shaft 4 continuously pushes on the inner and outer vortex side walls of the sliding hole 6011. Under the push of the rotating shaft 4, the rotating disk 601 rotates around its own axis at the same time, so that the rotating shaft 4 can move outward along the sliding hole 6011 at the same time, and the rotating disk 601 rotates approximately one circle every time the rotating shaft 4 advances a unit of distance, so that each point on the vortex line represented by the sliding hole 6011 moves in a circle around the center of the rotating disk 601, thereby forming countless concentric circular tracks; as the rotating shaft 4 moves forward, the rotating disk 601 rotates approximately one circle. 4 continuously revolves, so that when the point represented by the rotating shaft 4 moves to a circular trajectory that can cover the point where the first axis is located, as the rotating shaft 4 moves, the rotating shaft 4 can move to a position where the axis coincides with the first axis, at this time, the rotating shaft 4 and the inner and outer vortex side walls of the sliding hole 6011 are not in contact, and the rotating disk 601 remains stationary; in the above process, under the damping action of the damping part 602, the rotating shaft 4 can only move slowly along the sliding hole 6011 to avoid crossing the circular trajectory that can cover the point where the first axis is located.

[0065] Then, the rotating shaft 4 is switched to the second state, so that the rotating shaft 4 and the second clamping part 3 are fixedly connected, and the rotating shaft 4 can only rotate around its own axis relative to the machine base 1; then, the second drive motor 103 is turned off to stop the rotation of the first clamping part 2 around the first axis, and the clamping of the outer peripheral wall of the composite brake drum 9 is released, and then the first clamping part 2 is driven by the sliding rod 102 to move upward in the vertical direction to disengage from the composite brake drum 9; then, the rotating shaft 4 is driven to rotate around its own axis, and the rotating shaft 4 drives the composite brake drum 9 to rotate through the second clamping part 3, and then the drive cylinder 105 and the third drive motor 106 are started, wherein the third drive motor 106 drives the grinding disc 5 to rotate around its own axis, and the drive cylinder 105 drives the grinding disc 5 to move in the vertical direction from bottom to top to grind the upper half of the outer peripheral wall of the composite brake drum 9.

[0066] In a further embodiment, the damping portion 602 may be configured to include an elastic member, which is inserted into the sliding hole 6011 and connected between the rotating shaft 4 and the rotating disk 601 .

[0067] Specifically in this embodiment, the elastic member is configured as a compression spring 6021, such as Figure 2 As shown, the outer end of the compression spring 6021 is fixedly connected to the outer end wall of the sliding hole 6011, and the inner end of the compression spring 6021 abuts against the circumferential side wall of the rotating shaft 4. Under the action of the compression spring 6021, the rotating shaft 4 has a tendency to move inward along the sliding hole 6011, thereby achieving a damping effect.

[0068] In a further embodiment, in order to improve the damping effect of the compression spring 6021, a stopper 6022 is fixedly provided at the inner end of the compression spring 6021, and the contact surface between the stopper 6022 and the rotating shaft 4 is an arc surface, so that the contact between the stopper 6022 and the rotating shaft 4 can be more complete, avoiding the slipping problem when only the compression spring 6021 and the rotating shaft 4 are in contact.

[0069] In other embodiments, in order to improve the smoothness of the rotation of the rotating disk 601, the surface treatment device for the composite brake drum is configured to also include a plurality of balls 7, and the plurality of balls 7 are all inserted on the base 1 and can roll freely to form a rolling fit between the rotating disk 601 and the base 1.

[0070] Specifically in this embodiment, Figure 5 As shown, the ball 7 is inserted into the top of the first sub-ring of the support ring 107, and the number of the ball 7 can be eight. The eight ball 7 are evenly arranged along the circumference and abut against the bottom of the large sub-disc of the rotating disk 601 together to form a rolling fit between the rotating disk 601 and the base 1, thereby reducing the resistance encountered by the rotating disk 601 when rotating.

[0071] In a further embodiment, in order to further improve the smoothness of the rotation of the rotating disk 601, as Figure 2 As shown, the balls 7 can be provided with twelve more, and they are arranged in groups of two, divided into six groups in total, and the six groups are evenly arranged along the circumferential direction, and the two balls 7 in the same group are arranged at intervals along the radial direction of the rotating disk 601; Figure 5 As shown, the two balls 7 of the same group roll in contact with the bottom of the second clamping portion 3 to reduce the resistance encountered when the rotating disk 601 rotates and the second clamping portion 3 moves.

[0072] In other embodiments, in order to facilitate switching the state of the rotating shaft 4 , a closable magnetic connection is provided between the rotating shaft 4 and the base 1 and the second clamping portion 3 to switch the state of the rotating shaft 4 .

[0073] Specifically in this embodiment, the flower keypad can be set to an electromagnet, and the mounting ring 401 and the second clamping portion 3 can both be set to be made of magnetic materials, such as iron, cobalt, nickel, etc.; when the support ring 107 and the flower keypad are in an off-state, the rotating shaft 4 and the rotating disk 601 are both in a free state, and the rotating shaft 4 is in a first state; when the support ring 107 and the flower keypad are in an energized state, the rotating disk 601 and the mounting ring 401 are both magnetically adsorbed on the support ring 107, so that the position of the rotating disk 601 is fixed, and the position of the rotating shaft 4 in the horizontal direction is fixed. At this time, the rotating shaft 4 can only rotate around its own axis, and the second clamping portion 3 is magnetically adsorbed on the rotating shaft 4 so as to follow the rotation of the rotating shaft 4, and the rotating shaft 4 is in the second state.

[0074] In a further embodiment, in order to simplify the structure, a smaller current can be passed through the support ring 107 before the rotating shaft 4 is switched to the second state, so that the support ring 107 generates a smaller magnetic force, thereby generating a magnetic connection between the mounting ring 401 and the support ring 107. Under the action of the magnetic connection, the horizontal movement of the rotating shaft 4 will encounter a certain resistance, so that the damping part 602 can be replaced.

[0075] In a further embodiment, in order to prevent the rotating disk 601 from rotating too fast under the push of the rotating shaft 4, causing the rotating shaft 4 to cross the circular trajectory that can cover the point where the first axis is located, it is configured that before the rotating shaft 4 is switched to the second state, a smaller current is passed into the support ring 107, so that the support ring 107 generates a smaller magnetic force, thereby generating a magnetic connection between the rotating disk 601 and the support ring 107. Under the action of the magnetic connection, the rotating disk 601 will encounter a certain resistance when rotating around its own axis, thereby avoiding excessive speed.

[0076] In some other embodiments, the surface treatment device for a composite brake drum is configured to further include a driving assembly 8 , wherein the driving assembly 8 is configured to provide a driving force for rotating the rotating shaft 4 .

[0077] In a further embodiment, the driving assembly 8 is configured to include a first driving motor 801 and a connecting member, wherein the first driving motor 801 is disposed on the machine base 1 ; and the connecting member is connected between the first driving motor 801 and the rotating shaft 4 .

[0078] Specifically in this embodiment, Figure 3 and Figure 5 As shown, the first drive motor 801 is inserted into the cylindrical cavity 108, and the motor shaft of the first drive motor 801 is arranged upward in the vertical direction, and is connected to the rotating shaft 4 through a connecting member, so that when the rotating shaft 4 and the motor shaft of the first drive motor 801 are coaxial or non-axial, the rotating shaft 4 can be driven to rotate around its own axis.

[0079] In a further embodiment, the connecting member is configured as an Oldham coupling 802 .

[0080] Specifically in this embodiment, the cross slider coupling 802 is configured to be composed of a lower plate 8021, an intermediate plate 8022 and an upper plate 8023, wherein the lower plate 8021 is fixed and coaxially arranged on the top of the motor shaft of the first drive motor 801, and a first groove is opened on the top of the lower plate 8021, and the first groove is set as a strip structure and passes through the axis of the lower plate 8021, and both ends of the first groove pass through the circumferential side wall of the lower plate 8021; a second groove is opened at the bottom of the upper plate 8023, and the second groove is set as a strip structure and passes through the axis of the upper plate 8023, and both ends of the second groove pass through the circumferential side wall of the upper plate 8023; sliding protrusions are set on both plate surfaces of the intermediate plate 8022, and the sliding protrusions are set as a strip structure and pass through the axis of the intermediate plate 8022, and both ends of the sliding protrusions extend to the circumferential side wall of the intermediate plate 8022, and the two sliding protrusions are staggered by 90 degrees. When the intermediate plate 8022 is installed, the two sliding protrusions are slidably inserted into the first groove and the second groove respectively.

[0081] In other embodiments, the first clamping portion 2 and / or the second clamping portion 3 may be configured as a three-jaw chuck.

[0082] Specifically in this embodiment, when the first clamping part 2 is set as a three-jaw chuck, the first axis coincides with the axis of the first clamping part 2, and the driving force for the movement of the jaws of the first clamping part 2 can be provided by mechanical, hydraulic or pneumatic pressure; when the second clamping part 3 is set as a three-jaw chuck, the driving force for the movement of the jaws of the second clamping part 3 can be provided by hydraulic or pneumatic pressure.

[0083] In other embodiments, the first clamping portion 2 and / or the second clamping portion 3 may also be configured as a four-jaw chuck.

[0084] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A surface treatment device for a composite brake drum, characterized in that: The surface treatment device for the composite brake drum comprises: Machine base; A first clamping portion is disposed on the machine base and is configured to clamp the outer peripheral wall of the composite brake drum along the circumferential direction; the first clamping portion has a first axis and is rotatable around the first axis; A second clamping portion is movably disposed on the base and is movable relative to the first clamping portion in a direction of approaching or moving away from each other, and is configured to clamp the outer peripheral wall of the composite brake drum in a circumferential direction; A rotating shaft is inserted into the second clamping part and can rotate around its own axis; the rotating shaft has a first state and a second state. When in the first state, the rotating shaft and the base and the second clamping part are all movably connected; when in the second state, the rotating shaft and the second clamping part are fixedly connected and can only rotate around its own axis relative to the base; A grinding disc, which is arranged on the machine base and can rotate around its own axis and can slide relative to the first clamping portion in the direction of extension of the first axis, so as to grind the outer peripheral wall of the composite brake drum; An adjustment component is configured to adjust the position of the rotating shaft so that the axis of the rotating shaft coincides with the first axis.

2. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The adjustment component includes a rotating disk and a damping part. The rotating disk is arranged on the machine base. When the rotating shaft is in the first state, the rotating disk can rotate around its own axis; when the rotating shaft is in the second state, the rotating disk and the machine base are fixedly connected; a sliding hole is opened on the disk surface of the rotating disk, and the trajectory shape of the sliding hole is a spiral line; the rotating shaft is inserted into the sliding hole and can move along the sliding hole; the damping part is configured to hinder the movement of the rotating shaft.

3. The surface treatment device for a composite brake drum according to claim 2, characterized in that: The damping part includes an elastic member, which is inserted into the sliding hole and connected between the rotating shaft and the rotating disk.

4. The surface treatment device for a composite brake drum according to claim 3, characterized in that: The elastic member is configured as a compression spring.

5. The surface treatment device for a composite brake drum according to claim 2, characterized in that: The surface treatment device for the composite brake drum further comprises a plurality of balls, which are all inserted on the base and can roll freely, so that a rolling fit is formed between the rotating disk and the base.

6. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The rotating shaft and the base and the second clamping portion are all connected by closable magnetic connections to switch the state of the rotating shaft.

7. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The surface treatment device for a composite brake drum further includes a driving assembly configured to provide a driving force for rotating the rotating shaft.

8. The surface treatment device for a composite brake drum according to claim 7, characterized in that: The driving assembly includes a first driving motor and a connecting member, wherein the first driving motor is arranged on the machine base; and the connecting member is connected between the first driving motor and the rotating shaft.

9. The surface treatment device for a composite brake drum according to claim 8, characterized in that: The connecting piece is configured as a cross slide coupling.

10. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The first clamping part and / or the second clamping part is configured as a three-jaw chuck.

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