Polishing assembly for shaft fatigue specimen and polishing equipment comprising polishing assembly

Abstract

The invention provides a polishing assembly for a shaft fatigue specimen and polishing equipment comprising the polishing assembly, and belongs to the technical field of polishing equipment. The polishing assembly comprises a polishing wheel support provided with a sliding device; the polishing wheel is arranged at the lower end of the sliding device and can move up and down under the driving of the sliding device; the counterweight device is arranged at the upper end of the sliding device and is used for providing constant pressure for the polishing wheel, so that the polishing wheel is always in contact with the surface of the shaft fatigue specimen; and an abrasive belt released by the abrasive belt releasing device is wound around the polishing wheel and then is wound by the abrasive belt winding device. The balance weight device is arranged at the upper end of the sliding device, constant pressure is provided for the polishing wheel, the polishing wheel is made to make contact with the surface of the shaft fatigue sample all the time, pressure balance of the polishing area of the shaft fatigue sample is guaranteed, non-uniformity of the machined surface of the sample is avoided, and the polishing effect is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of polishing equipment, and in particular to a polishing component for a shaft fatigue specimen and a polishing equipment comprising the polishing component. Background Art

[0002] Shaft fatigue specimens usually have the characteristics of being large at both ends and slender in the middle, which makes it difficult to polish the longitudinal surface of the shaft. This makes it difficult to ensure the surface uniformity of the entire shaft during the polishing process. Since only the slender length in the middle is polished, the pressure and friction on different parts during polishing may be different, resulting in inconsistent polishing effects in local areas. For example, the polished surface is uneven, and there are also problems such as low efficiency and high labor intensity. Summary of the invention

[0003] In view of this, in order to solve the technical problem of inconsistent polishing effect in local areas of shaft fatigue specimens in the prior art. On the one hand, the present invention provides a polishing assembly for shaft fatigue specimens, which provides a constant pressure to the polishing wheel by arranging a counterweight device at the upper end of the sliding device, so that the polishing wheel is always in contact with the surface of the shaft fatigue specimen, ensuring the pressure balance of the polishing area of ​​the shaft fatigue specimen, avoiding the unevenness of the specimen processing surface, and greatly improving the polishing effect.

[0004] To achieve the above object, the present invention provides the following technical solutions: A polishing assembly for a shaft fatigue specimen, comprising: A polishing wheel bracket, on which a sliding device is provided; A polishing wheel, which is arranged at the lower end of the sliding device and can move up and down under the drive of the sliding device; A weight balancing device, which is arranged at the upper end of the sliding device and is used to provide a constant pressure to the polishing wheel so that the polishing wheel is always in contact with the surface of the shaft fatigue specimen; A sand belt releasing device and a sand belt winding device, wherein the sand belt released by the sand belt releasing device passes around the polishing wheel and is then wound up by the sand belt winding device.

[0005] Preferably, the sliding device comprises: A guide rail limiting plate, which is arranged on the polishing wheel bracket; A guide rail, which is slidably connected to the guide rail limiting plate; The counterweight device is arranged at the upper end of the guide rail, and the polishing wheel is arranged at the lower end of the guide rail.

[0006] Preferably, the abrasive belt releasing device comprises: an abrasive belt disc on which the abrasive belt is wound and released; The sanding belt guide wheel is arranged on the polishing wheel bracket to provide a guide for the sanding belt so that the sanding belt can run stably according to a preset winding direction.

[0007] Preferably, the abrasive belt winding device comprises: A sanding belt driving wheel, which is arranged on the polishing wheel bracket and is used to wind up the polished sanding belt; The first driving device is arranged on the polishing wheel bracket and is used for driving the abrasive belt driving wheel to rotate.

[0008] Preferably, it also includes: A sanding belt pressure wheel, which is rotatably connected to the polishing wheel bracket via a connecting rod; An elastic device, one end of which is connected to the polishing wheel bracket and the other end of which is connected to the connecting rod, is used to ensure that the abrasive belt pressure wheel always presses the abrasive belt after fine polishing.

[0009] Preferably, the elastic device is a spring.

[0010] Preferably, the counterweight device is a counterweight block.

[0011] Preferably, the counterweight device is connected to the upper end of the sliding device through the mounting seat.

[0012] On the other hand, the present invention also provides a shaft fatigue specimen polishing device, comprising the above-mentioned polishing assembly.

[0013] Preferably, it also includes: Bed; A slide table, which is arranged on the bed and is used for sliding connection with the polishing assembly; A chuck is arranged at both ends of the bed and is used to clamp the shaft fatigue specimen; A second driving device, disposed on the slide table, for driving the polishing assembly to reciprocate along the slide table; The external control system is provided with a sanding belt speed knob and a chuck speed knob, which are used to control the rotation speed of the sanding belt winding device and the rotation speed of the chuck respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The polishing assembly for shaft fatigue specimens provided by the present invention provides a constant pressure to the polishing wheel by arranging a counterweight device at the upper end of the sliding device, so that the polishing wheel is always in contact with the surface of the shaft fatigue specimen, thereby ensuring the pressure balance of the polishing area of ​​the shaft fatigue specimen, avoiding the unevenness of the specimen processing surface, and greatly improving the polishing effect. The processing difficulty of the shaft fatigue specimen is reduced, and the consistency of the specimen size is ensured.

[0015] The present invention can ensure high dimensional processing accuracy through external control system control, thereby greatly improving processing efficiency, reducing labor intensity, and processing quality of shaft fatigue specimens.

[0016] The polishing assembly of the shaft fatigue specimen provided by the present invention is used on the polishing equipment, so that the polishing work can be completed more efficiently. The design can be optimized according to the characteristics of the shaft specimen, reducing unnecessary operation steps and adjustment time. According to the influence of different material properties, the sanding belt mesh number can be changed from low to high and the sanding belt can be infinitely regulated under the control of an external control system to maintain the highest sharpness of the sanding belt. There is basically no heat generation during the polishing process, and the shaft fatigue specimen is maintained without changing the material structure. The difficulty of polishing is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of the polishing assembly provided by the present invention; Figure 2 A rear view of the polishing assembly provided by the present invention; Figure 3 A front view of the polishing device provided by the present invention; Figure 4 A rear view of the polishing device provided by the present invention; Figure 5 A top view of the polishing device provided by the present invention; Figure 6 It is a schematic diagram of the rotational motion of the chuck with a sinusoidal wave pattern; Figure 7 It is a schematic diagram of the chuck rotating in a square wave pattern; In the figure, 1, bed; 2, second driving device; 3, slide; 4, polishing assembly; 401, polishing wheel; 402, polishing wheel bracket; 403, counterweight device; 404, sanding belt disc; 405, sanding belt guide wheel; 406, sanding belt; 407, mounting seat; 408, sanding belt pressure wheel; 409, sanding belt driving wheel; 410, first driving device; 411, guide rail limit plate; 412, guide rail; 413, fixing block; 414, elastic device; 5, chuck; 6, shaft fatigue test specimen; 7, sanding belt speed knob; 8, chuck speed knob; 9, external control system; 10, control box. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-2 As shown, the present invention provides a polishing assembly 4 for a shaft fatigue specimen 6, comprising: The polishing wheel bracket 402 is provided with a sliding device as an installation basis. It can be slidably connected to the slide 3 on the polishing equipment described below, and reciprocate on the slide 3, preferably reciprocating linear motion, to achieve polishing of the shaft fatigue specimen 6.

[0022] The polishing wheel 401 is arranged at the lower end of the sliding device and can move up and down under the drive of the sliding device. Under the drive of the sliding device, the polishing wheel 401 always ensures that the pressing belt 406 is in contact with the surface of the area of ​​the shaft fatigue specimen 6 that needs to be polished.

[0023] The weight balancing device 403 is arranged at the upper end of the sliding device, and is used to provide a constant pressure to the polishing wheel 401, so that the polishing wheel 401 is always in contact with the surface of the shaft fatigue specimen 6, ensuring the pressure balance of the polishing area of ​​the shaft fatigue specimen 6, avoiding the unevenness of the specimen processing surface, and greatly improving the polishing effect. The processing difficulty of the shaft fatigue specimen 6 is reduced, and the consistency of the specimen size is ensured. Among them, the weight balancing device 403 is preferably a weight block, and the weight of the weight block can be selected according to the constant pressure required for the shaft fatigue specimen 6 to be polished. There is no specific limitation here, and it can be selected according to actual needs.

[0024] The belt release device and the belt retracting device are used. The belt 406 released by the belt release device passes around the polishing wheel 401 and is then retracted by the belt retracting device. Specifically, the belt release device is wound with a belt 406 (the belt is an unpolished belt). After the belt 406 is released from the belt release device, it passes through a plurality of belt guide wheels 405 (such as Figure 1 As shown, four abrasive belt guide wheels 405 are shown), and the abrasive belt 406 is guided by the abrasive belt guide wheels 405 so that it can stably run in a preset running direction. Figure 1 4 abrasive belt guide wheels 405 are shown, 2 of which are located at the front end of the polishing wheel 401, and the other 2 are located at the rear end of the polishing wheel 401. The 2 abrasive belt guide wheels 405 at the front end guide the unpolished abrasive belt 406 so that it can stably contact the polishing wheel 401, and stably polish the shaft fatigue specimen 6 under the downward pressure of the polishing wheel 401. The 2 abrasive belt guide wheels 405 at the rear end guide the polished abrasive belt 406 so that it can be stably reeled up by the abrasive belt reeling device.

[0025] In the present invention, the sliding device comprises: A guide rail limiting plate 411, which is arranged on the polishing wheel bracket 402; A guide rail 412, which is slidably connected to the guide rail limiting plate 411; The counterweight device 403 is disposed at the upper end of the guide rail 412 , and the polishing wheel 401 is disposed at the lower end of the guide rail 412 .

[0026] The setting of the guide rail limit plate 411 can limit the guide rail 412, so that the guide rail 412 can slide up and down in the guide rail limit plate 411. When the polishing wheel 401 passes through the surface of the local polishing area of ​​the shaft fatigue specimen 6, it can adapt to the shape of the surface, so that the guide rail 412 can adaptively rise or fall in the guide rail limit plate 411 to adapt to the surface of the shaft fatigue specimen 6 that needs to be polished.

[0027] In the present invention, the abrasive belt releasing device comprises: The abrasive belt disc 404 is wound and released with the abrasive belt 406 , and the abrasive belt 406 is released under the action of an abrasive belt retracting device (such as the abrasive belt driving wheel 409 described below). The abrasive belt disc 404 is preferably rotatably connected to the polishing wheel bracket 402 .

[0028] The sanding belt guide wheel 405 is disposed on the polishing wheel bracket 402 to provide a guide for the sanding belt 406 so that the sanding belt 406 can run stably in a preset winding direction.

[0029] In the present invention, the abrasive belt winding device comprises: A sanding belt driving wheel 409, which is disposed on the polishing wheel bracket 402 and is used to roll up the polished sanding belt 406; The first driving device 410 is disposed on the polishing wheel bracket 402 and is used to drive the abrasive belt driving wheel 409 to rotate, wherein the first driving device 410 is preferably a servo motor.

[0030] The first driving device 410 drives the abrasive belt driving wheel 409 to rotate and thus reel in the polished abrasive belt 406. At the same time, the first driving device 410 drives the abrasive belt driving wheel 409 to rotate and also provides a driving force for the abrasive belt releasing device to release the unpolished abrasive belt 406. For example, the rotation of the abrasive belt driving wheel 409 drives the abrasive belt disc 404 to rotate, thereby releasing the unpolished abrasive belt 406.

[0031] In the present invention, the abrasive belt winding device further comprises: The sanding belt pressure wheel 408 is rotatably connected to the polishing wheel bracket 402 via a connecting rod. The sanding belt pressure wheel 408 presses down the polished sanding belt 406 to ensure stable winding of the sanding belt driving wheel 409 and improve the stability of operation.

[0032] The elastic device 414 has one end connected to the polishing wheel bracket 402 and the other end connected to the connecting rod, so as to ensure that the abrasive belt pressure wheel 408 always presses the abrasive belt 406 after fine polishing.

[0033] In the present invention, the elastic device 414 is a spring, which is used to always provide tension to the sanding belt pressure wheel 408 so that the sanding belt 406 after polishing is always pressed down.

[0034] In the present invention, the counterweight device 403 is connected to the upper end of the sliding device through the mounting seat 407, so that different counterweights can be replaced according to actual needs, while avoiding interference with the sliding of the guide rail 412.

[0035] like Figure 3-5 As shown, on the other hand, the present invention also provides a polishing device for a shaft fatigue specimen 6, comprising the above-mentioned polishing assembly 4.

[0036] The polishing assembly 4 is preferably capable of reciprocating on the polishing device to polish the shaft fatigue test specimen 6 .

[0037] In the present invention, the polishing device for the shaft fatigue specimen 6 also includes: Bed 1; A slide 3 is provided on the bed 1 and is used for sliding connection with the polishing assembly 4, preferably a linear slide 3, which is used for providing a basis for reciprocating motion of the polishing assembly 4; Chucks 5 are provided at both ends of the bed 1 and are used to clamp the shaft fatigue specimen 6; The second driving device 2 is arranged on the slide 3, and is used to drive the polishing assembly 4 to reciprocate along the slide 3. It is preferably a driving device composed of a servo motor and a synchronous belt. For example, a fixed block 413 can be arranged on the polishing wheel bracket 402 of the polishing assembly 4. The fixed block 413 is screwed to the slider, and the slider is screwed to the slide, etc. The servo motor drives the synchronous belt to rotate, and then drives the fixed block 413 to move on the slide through the slider, thereby driving the polishing assembly 4 to move. The moving speed is adjusted by the rotation speed of the servo motor, and the reciprocating movement of the polishing assembly 4 is controlled by the forward and reverse rotation of the servo motor; The external control system 9 (preferably located in the control box 10) is provided with a belt speed knob 7 and a chuck speed knob 8, which are respectively used to control the rotation speed of the belt winding device and the rotation speed of the chuck 5. The belt speed knob 7 can adjust the rotation speed of the belt winding device by controlling the rotation speed of the belt driving wheel 409 driven by the first driving device 410, and adjust the rotation speed of the shaft fatigue specimen 6 clamped by the chuck 5 through the driving device.

[0038] In the present invention, the second driving device 2 is controlled by the external control system 9 according to the program setting, so that the polishing assembly 4 reciprocates on the slide 3 to polish the shaft fatigue specimen 6. At the same time, the belt pressure wheel 408 applies force to press the polished belt 406 and the belt driving wheel 409 through the elastic device 414, and the belt driving wheel 409 rotates under the drive of the first driving device 410 to bring out the belt 406 wound on the belt disk 404. The polishing wheel 401 is installed at the lower end of the guide rail 412, and the counterweight device 403 applies pressure on the polishing wheel 401 through the guide rail 412, contacts the area of ​​the shaft fatigue specimen 6 that needs to be polished, and moves along the shape of the area of ​​the shaft fatigue specimen 6 that needs to be polished. The whole composed of the counterweight device 403, the polishing wheel 401 and the sliding device moves up and down with the shape, and always contacts the surface of the shaft fatigue specimen 6 so as to perform axial reciprocating motion for polishing. The chuck 5 performs a rotary motion to drive the shaft fatigue pattern to rotate synchronously. The rotary motion of the chuck 5 can be set to a sinusoidal wave pattern according to the requirements (such as Figure 6 or intermittent rotary motion, i.e. square wave pattern (such as Figure 7 as shown).

[0039] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A polishing assembly for shaft fatigue specimens, characterized in that: include: A polishing wheel bracket, on which a sliding device is provided; A polishing wheel, which is arranged at the lower end of the sliding device and can move up and down under the drive of the sliding device; A weight balancing device, which is arranged at the upper end of the sliding device and is used to provide a constant pressure to the polishing wheel so that the polishing wheel is always in contact with the surface of the shaft fatigue specimen; A sand belt releasing device and a sand belt winding device, wherein the sand belt released by the sand belt releasing device passes around the polishing wheel and is then wound up by the sand belt winding device.

2. The polishing assembly for shaft fatigue specimen according to claim 1, characterized in that: The sliding device comprises: A guide rail limiting plate, which is arranged on the polishing wheel bracket; A guide rail, which is slidably connected to the guide rail limiting plate; The counterweight device is arranged at the upper end of the guide rail, and the polishing wheel is arranged at the lower end of the guide rail.

3. The polishing assembly for shaft fatigue specimen according to claim 1, characterized in that: The abrasive belt releasing device comprises: an abrasive belt disc on which the abrasive belt is wound and released; The sanding belt guide wheel is arranged on the polishing wheel bracket to provide a guide for the sanding belt so that the sanding belt can run stably according to a preset winding direction.

4. The polishing assembly for shaft fatigue specimen according to claim 1, characterized in that: The abrasive belt winding device comprises: A sanding belt driving wheel, which is arranged on the polishing wheel bracket and is used to wind up the polished sanding belt; The first driving device is arranged on the polishing wheel bracket and is used for driving the abrasive belt driving wheel to rotate.

5. The polishing assembly for shaft fatigue specimens according to claim 4, characterized in that: Also includes: A sanding belt pressure wheel, which is rotatably connected to the polishing wheel bracket via a connecting rod; An elastic device, one end of which is connected to the polishing wheel bracket and the other end of which is connected to the connecting rod, is used to ensure that the abrasive belt pressure wheel always presses the abrasive belt after fine polishing.

6. The polishing assembly for shaft fatigue specimen according to claim 5, characterized in that: The elastic device is a spring.

7. The polishing assembly for shaft fatigue specimen according to claim 1, characterized in that: The counterweight device is a counterweight block.

8. A polishing assembly for a shaft fatigue specimen according to any one of claims 1 to 7, characterized in that: The counterweight device is connected to the upper end of the sliding device through the mounting seat.

9. A shaft fatigue specimen polishing device, characterized in that: A polishing assembly comprising the polishing assembly described in any one of claims 1 to 8.

10. The shaft fatigue specimen polishing device according to claim 9, characterized in that: Also includes: Bed; A slide table, which is arranged on the bed and is used for sliding connection with the polishing assembly according to any one of claims 1 to 8; A chuck is arranged at both ends of the bed and is used to clamp the shaft fatigue specimen; A second driving device, disposed on the slide table, for driving the polishing assembly to reciprocate along the slide table; The external control system is provided with a sanding belt speed knob and a chuck speed knob, which are used to control the rotation speed of the sanding belt winding device and the rotation speed of the chuck respectively.

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