Crankshaft polishing apparatus

Abstract

The utility model relates to a kind of crankshaft polishing equipment, it includes: base, saddle, servo drive electric cylinder, mobile support seat, bow type support frame, tensioning device and guide shaft, wherein, base is set on the left support frame and right support frame of lathe, line rail and four groups of sliding blocks are set on base, four groups of sliding blocks are set with saddle, screw rod and servo motor are set in the lower part of saddle, lower connecting hinge seat and translation support seat are set in the upper part of saddle, first connecting shaft is set in lower connecting hinge seat and upper connecting hinge seat, upper connecting hinge is set in the lower part of servo drive electric cylinder, translation support seat is set on saddle, translation support seat upper portion is equipped with guide strip and is slidably connected in the rear portion U-shaped sliding groove of mobile support plate, motor drives abrasive cloth wheel rotation, tensioning device and abrasive cloth wheel are set in the front end of bow type support frame, and tensioning device includes guide support sleeve and spring.According to the crankshaft polishing equipment of the utility model, when crankshaft and step shaft are processed, high-precision machining can be realized.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, and more specifically, to a crankshaft polishing device. Background Technology

[0002] The surface polishing of crankshaft parts, especially crankshafts and stepped shafts, requires very strict requirements on surface roughness and outer diameter. Traditional polishing equipment is inefficient for polishing crankshafts and stepped shafts.

[0003] In the actual machining process of crankshaft parts, it is required that the abrasive belt rotates synchronously with the crankshaft connecting rod journal. Specifically, during machining, the abrasive belt moves up and down with the crankshaft connecting rod journal. For general lathe polishing equipment, the operator must constantly adjust the hand-held polishing wheel to move up and down, which leads to a decrease in the surface roughness and outer diameter accuracy of the crankshaft connecting rod journal. Consequently, it can only be used for rough surface machining and cannot meet the requirements of high-precision machining. This will affect the finished product quality and work efficiency of crankshaft parts in terms of surface roughness and outer diameter machining.

[0004] Therefore, in order to improve the surface polishing efficiency of such shaft parts and ensure higher surface roughness and outer diameter during crankshaft and stepped shaft machining, it is urgent to adjust and optimize the polishing equipment for ordinary lathes. Summary of the Invention

[0005] The technical problem to be solved by this utility model is the inability to achieve high-precision machining requirements when processing crankshafts and stepped shafts.

[0006] To solve the above-mentioned technical problems, this utility model provides a crankshaft polishing device. The crankshaft polishing device is mounted on a lathe and includes: a base, a slide saddle, a servo drive electric cylinder, a movable support seat, an arch-shaped support frame, a tensioning device, and a guide shaft. The base is mounted on the left and right support frames of the lathe. A linear guide and four sets of sliders are mounted on the base. A slide saddle is mounted on each of the four sets of sliders. A lead screw and a servo motor are mounted below the slide saddle. A lower connecting hinge seat and a translational support seat are mounted above the slide saddle. A first connecting shaft is located between the lower and upper connecting hinge seats. The upper connecting hinge is mounted on the servo drive... At the lower part of the electric cylinder, a translation support seat is set on the slide saddle. The upper part of the translation support seat is provided with a guide bar and is slidably connected to the U-shaped sliding groove at the rear of the moving support plate. The servo-driven electric cylinder is rotatably connected to the connecting bolt installed at the rear of the moving support plate. A variable frequency motor is set at the lower part of the moving support plate, and an arch-shaped support frame is set at the front. The variable frequency motor drives the abrasive wheel to rotate. A tensioning device and a front abrasive wheel are set at the front end of the arch-shaped support frame. The tensioning device includes a guide support sleeve and a spring. A guide support shaft is set at the front end of the guide support sleeve. The moving support plate slides on the first guide shaft, which is set on the left support frame and the right support frame.

[0007] According to an embodiment of the present invention, a guide groove may be provided on the top surface of the base, and a linear guide rail and a slider are installed on the guide groove. Correspondingly, a positioning step is provided on the bottom surface of the slide saddle, and the positioning step is used to position and fix the slider.

[0008] According to an embodiment of the present invention, the slide saddle may be provided with a threaded hole, and a translation support seat and a lower connecting hinge seat are respectively installed on both sides of the top surface of the slide saddle. The lead screw is connected to the lead screw nut seat on the bottom surface of the slide saddle. The lead screw is controlled to rotate by the servo motor of the base, thereby moving the slide saddle to move left and right on the crank axis.

[0009] According to an embodiment of the present invention, a guide bar may be provided on the upper part of the translation support base, and correspondingly, a U-shaped sliding groove is provided on the rear part of the movable support plate, and the guide bar is slidably placed inside the U-shaped sliding groove.

[0010] According to an embodiment of the present invention, the lower connecting hinge seat may be provided with a shaft hole, and correspondingly, the upper connecting hinge seat is provided with a shaft hole, and the first connecting shaft is installed on the two shaft holes.

[0011] According to an embodiment of the present invention, a threaded hole can be provided at the bottom of the servo-driven electric cylinder and a shaft hole can be provided at the top. Correspondingly, an upper connecting hinge is installed on the base of the servo-driven electric cylinder, and a shaft hole is provided for the corresponding connecting bolt. A second connecting shaft is installed on the two shaft holes.

[0012] According to an embodiment of the present invention, threaded holes can be provided on the front and rear sides of the upper part of the movable support plate. Correspondingly, movable support blocks are installed on the front and rear sides of the movable support plate. Two movable support blocks are provided with threaded holes. The connecting bolts are used to install the rear movable support block, and the bow-shaped support frame is installed on the threaded hole of the front movable support block.

[0013] According to an embodiment of the present invention, a movable support sleeve is slidably disposed on the first guide shaft, the movable support sleeve has a shaft hole in the middle, a linear bearing is installed in the middle shaft hole and slidably disposed on the first guide shaft, a threaded hole is provided at the bottom of the movable support sleeve, and a movable support plate is installed at the bottom of the movable support sleeve.

[0014] According to an embodiment of the present invention, a threaded rod can be provided at the rear end of the bow-shaped support frame, and a second guide shaft can be provided at the front end, with a guide groove provided on the second guide shaft; correspondingly, the guide support sleeve is provided with a shaft hole and a positioning thread, with a guide groove provided on the shaft hole, and a positioning key is provided in the guide groove of the guide support sleeve and the second guide shaft, which can slide relative to each other during operation, and a limit bolt is installed in the positioning hole.

[0015] According to an embodiment of the present invention, a first positioning shaft with a spring can be provided at the lower part of the guide support sleeve, and a second positioning shaft with a spring is provided at the lower part of the bow-shaped support frame. The spring is installed between the first positioning shaft and the second positioning shaft. A shaft hole is provided on the side of the guide support sleeve, and the guide support shaft is installed on the shaft hole. An abrasive wheel is installed on the other end of the guide support shaft.

[0016] Compared with the prior art, the technical solution provided by the embodiments of this utility model can achieve at least the following beneficial effects:

[0017] According to this utility model, a crankshaft polishing device has a motor mount on the base, and a lead screw is mounted on the motor mount. A servo motor is mounted on one end of the lead screw, and a bearing seat is mounted on the other end. The lead screw nut is located at the lower part of the slide saddle. A translational support seat is mounted on the upper part of the slide saddle. The translational support seat drives the movable support plate to move axially left and right. An arc-shaped support frame is mounted in front of the movable support plate, and the movable support plate slides on a guide shaft. Ultimately, the arc-shaped support frame drives the abrasive belt to move axially left and right. When polishing the surface of crankshafts and stepped shaft parts, the operator can use the actual starting position of the shaft as the relative zero point position. The servo motor is controlled by the program to adjust the abrasive belt to move to the designated position on the shaft. Compared with traditional manual adjustment devices, this device can quickly and accurately find the position by rotating the lead screw through the rotation of the servo motor, thus moving more accurately to the position to be polished.

[0018] According to the crankshaft polishing equipment of this utility model, a servo-driven electric cylinder is installed on the upper part of the slide saddle, and a lower connecting hinge seat and an upper connecting hinge seat are provided between the slide saddle and the servo-driven electric cylinder to realize the free rotation of the servo-driven electric cylinder. The other end of the servo-driven electric cylinder is installed on the connecting bolt provided at the front of the movable support plate. Furthermore, the servo-driven electric cylinder is controlled by a servo motor to move the piston rod up and down. When polishing the surface of the crankshaft and stepped shaft, the operator can set the relative outer diameter parameters according to the outer diameter size requirements provided in the drawings. During operation, the CNC system controls the servo motor of the servo-driven electric cylinder to drive the piston rod to move up and down according to the program, which in turn drives the abrasive wheel on the bow-shaped support frame to rotate and process the shaft surface with a certain pre-pressure according to the drawing requirements. Compared with the traditional manual pre-pressure, this device can realize the rapid and precise up and down movement of the piston rod, which facilitates the surface polishing of crankshafts and stepped shafts with different shaft diameters. In particular, for crankshafts, the abrasive belt and connecting rod journal can move synchronously, resulting in a more uniform surface roughness of the shaft.

[0019] According to the crankshaft polishing equipment of this utility model, a tensioning device is provided at the front end. Specifically, a guide shaft two is provided at the front end of the bow-shaped support frame. A keyway is provided at the middle position of the upper part of the guide shaft two and a positioning groove is provided at the middle position of the side part. During operation, the guide support sleeve slides back and forth on the guide shaft two. Its preload is generated by the springs provided at the lower part of the bow-shaped support frame and the lower part of the guide support sleeve. Correspondingly, the front abrasive wheel is provided on the guide support shaft on the side of the guide support sleeve. During operation, the elastic force of the spring gives the abrasive belt a certain tension force, so that the abrasive belt maintains a certain preload after wear. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0021] Figure 1a This is a front schematic diagram of a crankshaft polishing device according to an embodiment of the present invention;

[0022] Figure 1b This is a schematic diagram showing a crankshaft polishing device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram showing the structure of a crankshaft polishing device according to an embodiment of the present invention;

[0024] Figure 3 This is an exploded view showing a crankshaft polishing device according to an embodiment of the present invention;

[0025] Figure 4 This is one of the partial views showing a crankshaft polishing device according to an embodiment of the present invention;

[0026] Figure 5 This is a second partial view showing a crankshaft polishing device according to an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a limitation of quantity, but rather indicate the presence of at least one.

[0029] Figure 1a This is a front schematic diagram of a crankshaft polishing device according to an embodiment of the present invention; Figure 1b This is a schematic diagram showing a crankshaft polishing device according to an embodiment of the present invention; Figure 2This is a schematic diagram showing the structure of a crankshaft polishing device according to an embodiment of the present invention; Figure 3 This is an exploded view showing a crankshaft polishing device according to an embodiment of the present invention; Figure 4 This is one of the partial views showing a crankshaft polishing device according to an embodiment of the present invention; Figure 5 This is a second partial view showing a crankshaft polishing device according to an embodiment of the present invention.

[0030] like Figures 1a to 5 As shown, the crankshaft polishing equipment 3 includes: a base 10, a sliding saddle 13, a servo-driven electric cylinder 20, a movable support seat, an arc-shaped support frame 40, a tensioning device, and a guide shaft.

[0031] The base 10 is mounted on the left support frame 21 and the right support frame 22 of the lathe 1. Linear guides and four sets of sliders 11 are mounted on the base 10. Saddles 13 are mounted on the four sets of sliders 11. A lead screw and a servo motor 15 are mounted on the lower part of the saddles 13. A lower connecting hinge seat and a translational support seat 27 are mounted on the upper part of the saddles 13. A first connecting shaft 23 is located between the lower and upper connecting hinge seats. The upper connecting hinge is located below the servo-driven electric cylinder 20. The translational support seat 27 is mounted on the saddles 13. A guide bar is provided on the upper part of the translational support seat 27 and it is slidably connected to the rear of the movable support plate 30. Inside the U-shaped sliding groove, the servo-driven electric cylinder 20 is rotatably connected to the connecting bolt 36 installed at the rear of the movable support plate 30. The movable support plate 30 is equipped with a variable frequency motor 35 at the lower part and an arch-shaped support frame 40 at the front. The variable frequency motor 35 drives the abrasive wheel 44 to rotate. The front end of the arch-shaped support frame 40 is equipped with a tensioning device and a front abrasive wheel 44. The tensioning device includes a guide support sleeve 41 and a spring 42. The front end of the guide support sleeve 41 is equipped with a guide support shaft 43. The movable support plate 30 slides on the first guide shaft 34. The first guide shaft 34 is set on the left support frame 21 and the right support frame 22.

[0032] According to one or more embodiments of the present invention, a guide groove is provided on the top surface of the base 10, and a linear guide rail 12 and a slider 11 are installed on the guide groove. Correspondingly, a positioning step is provided on the bottom surface of the slide saddle 13, and the positioning step is used to position and fix the slider 11.

[0033] According to one or more embodiments of the present invention, the slide saddle 13 is provided with a threaded hole, and a translation support seat 27 and a lower connecting hinge seat are respectively installed on both sides of the top surface of the slide saddle 13. The lead screw 14 is connected to the lead screw nut seat on the bottom surface of the slide saddle 13. The lead screw 14 is controlled to rotate by the servo motor 15 of the base 10, thereby moving the slide saddle 13 to move left and right on the crank axis.

[0034] According to one or more embodiments of the present invention, the upper part of the translational support base 27 is provided with a guide bar, and correspondingly, the rear part of the movable support plate 30 is provided with a U-shaped sliding groove, and the guide bar is slidably placed inside the U-shaped sliding groove.

[0035] According to one or more embodiments of the present invention, the lower connecting hinge seat is provided with a shaft hole, and correspondingly, the upper connecting hinge seat 25 is provided with a shaft hole, and the first connecting shaft 23 is installed on the two shaft holes.

[0036] According to one or more embodiments of the present invention, the servo drive electric cylinder 20 is provided with a threaded hole at the bottom and a shaft hole at the top. Correspondingly, the upper connecting hinge is installed on the base 10 of the servo drive electric cylinder 20, and the shaft hole is provided on the corresponding connecting bolt 36. The second connecting shaft 26 is installed on the two shaft holes.

[0037] According to one or more embodiments of the present invention, threaded holes are provided on the front and rear sides of the upper part of the movable support plate 30. Correspondingly, movable support blocks 31 are installed on the front and rear sides of the movable support plate 30. Two movable support blocks 31 are provided with threaded holes. The connecting bolts 36 are used to install the rear movable support block 31, and the bow-shaped support frame 40 is installed on the threaded hole of the front movable support block 31.

[0038] According to one or more embodiments of the present invention, a movable support sleeve 32 is slidably disposed on the first guide shaft 34, a shaft hole is provided in the middle of the movable support sleeve 32, a linear bearing 33 is installed in the middle shaft hole and slidably disposed on the first guide shaft 34, a threaded hole is provided at the bottom of the movable support sleeve 32, and a movable support plate 30 is installed at the bottom of the movable support sleeve 32.

[0039] According to one or more embodiments of the present invention, the bow-shaped support frame 40 is provided with a threaded rod at the rear end and a second guide shaft 47 at the front end, and a guide groove is provided on the second guide shaft 47; correspondingly, the guide support sleeve 41 is provided with a shaft hole and a positioning thread, and a guide groove is provided on the shaft hole. A positioning key is provided in the guide groove of the guide support sleeve 41 and the second guide shaft 47, so that they can slide relative to each other during operation. The limit bolt 48 is installed in the positioning hole.

[0040] According to one or more embodiments of the present invention, a spring 42 is provided at the lower part of the guide support sleeve 41 as a first positioning shaft, and correspondingly, a spring 42 is provided at the lower part of the bow-shaped support frame 40 as a second positioning shaft. The spring 42 is installed between the first positioning shaft and the second positioning shaft. A shaft hole is provided on the side of the guide support sleeve 41, and a guide support shaft 43 is installed on the shaft hole. An abrasive wheel 44 is installed on the other end of the guide support shaft 43.

[0041] According to this utility model, a crankshaft polishing device has a motor mount on the base, and a lead screw is mounted on the motor mount. A servo motor is mounted on one end of the lead screw, and a bearing seat is mounted on the other end. The lead screw nut is located at the lower part of the slide saddle. A translational support seat is mounted on the upper part of the slide saddle. The translational support seat drives the movable support plate to move axially left and right. An arc-shaped support frame is mounted in front of the movable support plate, and the movable support plate slides on a guide shaft. Ultimately, the arc-shaped support frame drives the abrasive belt to move axially left and right. When polishing the surface of crankshafts and stepped shaft parts, the operator can use the actual starting position of the shaft as the relative zero point position. The servo motor is controlled by the program to adjust the abrasive belt to move to the designated position on the shaft. Compared with traditional manual adjustment devices, this device can quickly and accurately find the position by rotating the lead screw through the rotation of the servo motor, thus moving more accurately to the position to be polished.

[0042] According to the crankshaft polishing equipment of this utility model, a servo-driven electric cylinder is installed on the upper part of the slide saddle, and a lower connecting hinge seat and an upper connecting hinge seat are provided between the slide saddle and the servo-driven electric cylinder to realize the free rotation of the servo-driven electric cylinder. The other end of the servo-driven electric cylinder is installed on the connecting bolt provided at the front of the movable support plate. Furthermore, the servo-driven electric cylinder is controlled by a servo motor to move the piston rod up and down. When polishing the surface of the crankshaft and stepped shaft, the operator can set the relative outer diameter parameters according to the outer diameter size requirements provided in the drawings. During operation, the CNC system controls the servo motor of the servo-driven electric cylinder to drive the piston rod to move up and down according to the program, which in turn drives the abrasive wheel on the bow-shaped support frame to rotate and process the shaft surface with a certain pre-pressure according to the drawing requirements. Compared with the traditional manual pre-pressure, this device can realize the rapid and precise up and down movement of the piston rod, which facilitates the surface polishing of crankshafts and stepped shafts with different shaft diameters. In particular, for crankshafts, the abrasive belt and connecting rod journal can move synchronously, resulting in a more uniform surface roughness of the shaft.

[0043] According to the crankshaft polishing equipment of this utility model, a tensioning device is provided at the front end. Specifically, a guide shaft two is provided at the front end of the bow-shaped support frame. A keyway is provided at the middle position of the upper part of the guide shaft two and a positioning groove is provided at the middle position of the side part. During operation, the guide support sleeve slides back and forth on the guide shaft two. Its preload is generated by the springs provided at the lower part of the bow-shaped support frame and the lower part of the guide support sleeve. Correspondingly, the front abrasive wheel is provided on the guide support shaft on the side of the guide support sleeve. During operation, the elastic force of the spring gives the abrasive belt a certain tension force, so that the abrasive belt maintains a certain preload after wear.

[0044] According to one or more embodiments of the present invention, such as Figure 3As shown, a guide groove is provided on the top surface of the base 10. The linear guide rail 12 and the slider 11 are set in the guide groove on the top surface of the base 10. A positioning step and a screw nut seat are provided on the bottom surface of the slide saddle 13. The slider 11 is installed inside the positioning step. The screw 14 is connected to the screw nut seat of the slide saddle 13. The servo motor 15 is set on a motor seat on one side of the base 10. The screw 14 is installed on the shaft end of the servo motor 15. During operation, the rotation of the servo motor 15 controls the rotation of the screw 14. Correspondingly, the slide saddle 13 moves left and right on the linear guide rail 12 under the drive of the screw 14.

[0045] The slide saddle 13 has a translation support seat 27 and a lower connecting hinge seat 24 on its top surface, respectively. A first connecting shaft 23 is provided between the upper connecting hinge seat 25 and the lower connecting hinge seat 24. During operation, the upper connecting hinge seat 25 and the lower connecting hinge seat 24 rotate around the first connecting shaft 23. Correspondingly, a servo drive electric cylinder 20 is installed on the top surface of the upper connecting hinge seat 25. The piston rod of the servo drive electric cylinder 20 has a shaft hole at its top, which is connected to the connecting bolt 36 through the second connecting shaft 26. During operation, the servo drive electric cylinder 20 and the connecting bolt 36 rotate around the second connecting shaft 26. Correspondingly, the top of the translation support seat 27 has a guide bar. The guide bar slides through the U-shaped sliding groove at the rear of the movable support plate 30. During operation, the slide saddle 13 drives the translation support seat 27 to move, and the translation support seat 27 drives the movable support plate 30 to move, ultimately realizing the left and right movement of the movable support plate 30 on the lathe axis.

[0046] Movable support blocks 31 are installed on the front and rear sides of the movable support plate 30, respectively. One end of the movable support block 31 is provided with a threaded hole. The connecting bolt 36 is installed on the movable support block 31 on the rear side of the movable support plate 30. The bow-shaped support frame 40 is provided with a threaded rod on the rear shaft and is installed on the movable support block 31 on the front side of the movable support plate 30. The top of the rear shaft of the bow-shaped support frame 40 is provided with a guide groove. The bow-shaped support frame 40 is prevented from rotating by locking the fixing bolt on the top of the movable support block 31. Correspondingly, the movable support sleeve 32 is provided on the top of the movable support plate 30. The linear bearing 33 is installed inside the movable support sleeve 32. During operation, the movable support sleeve 32 moves left and right relative to the lathe axis on the first guide shaft 34. Correspondingly, the variable frequency motor 35 is installed at the bottom of the movable support plate 30 and moves with the movable support plate 30. The shaft end of the variable frequency motor 35 is provided with a sanding wheel and a sanding belt 45 is installed between the sanding wheel 44 and the sanding belt 45.

[0047] A second guide shaft 47 is provided at the front end of the bow-shaped support frame 40. A guide groove is provided on the second guide shaft 47. Correspondingly, a guide support sleeve 41 has a shaft hole with a guide groove inside. Key blocks are installed inside the guide grooves on the second guide shaft 47 and the guide support sleeve 41. During operation, the guide support sleeve 41 slides back and forth on the second guide shaft 47. Correspondingly, a spring positioning shaft and a through hole are provided at the lower front end of the bow-shaped support frame 40, and a spring positioning shaft 42 and a threaded hole are provided at the lower part of the guide support sleeve 41. The two positioning shafts are connected by a spring and connected at the lower part by a pre-tightening bolt 49. During operation, the pre-tightening force of the spring 42 is changed by adjusting the distance between the guide support sleeve 41 and the second guide shaft 47 using the pre-tightening bolt 49, thereby changing the tension of the abrasive belt 45. Correspondingly, a guide support shaft 43 is installed on the side of the guide support sleeve 41, and an abrasive wheel 44 is installed at the other end of the guide support shaft 43.

[0048] In addition, the base 10 and the first guide shaft 34 are respectively installed at the bottom and top of the left support frame 21 and the right support frame 22, and the left support frame 21 and the right support frame 22 are installed on the lathe bed 1 from the left and right sides.

[0049] As an embodiment of this utility model, before the crankshaft is installed, the operator controls the bow-shaped support frame 40 to be raised via the control panel.

[0050] After installing crankshaft-type parts, by analyzing the drawings and technical requirements, a sanding cloth belt 45 with the appropriate mesh size is selected according to the surface roughness and outer diameter requirements of the drawings. Specifically, by adjusting the pre-tightening bolt 49 to shorten the distance between the sanding wheel and the sanding wheel 44 at the shaft end of the variable frequency motor 35, the sanding cloth belt 45 is installed on the two wheels. The operator continues to adjust the pre-tightening bolt 49 to increase the distance between the two wheels, and the spring 42 applies a certain tension force to the sanding cloth belt 45 to ensure that it does not fall off during rotation. Correspondingly, the zero-point position of the sanding cloth belt 45 on the shaft is set, and the sliding saddle 13 is moved via the control panel to drive the bow-shaped support frame 40 upwards. The abrasive belt 45 finds its relative starting position on the shaft, which is set as the zero point of the abrasive belt 45. The program is programmed according to the shaft diameter and the position to be polished. The device works according to the CNC system program instructions. The specific working process is as follows: the program is edited according to the drawing requirements, and the servo motor 15 is controlled to move the abrasive belt 45 to the position to be processed in the shaft diameter direction. Then, the servo drive cylinder 20 drives the bow-shaped support frame 40 to move up and down on the shaft surface at the specified position according to the program instructions. Before the movement starts, the frequency converter motor 35 is adjusted to a suitable speed according to the surface roughness requirements. At this time, the surface polishing of the part begins.

[0051] In use, the crankshaft polishing equipment described in this utility model can drive the lead screw through the rotation of the servo motor. Under the action of the lead screw, the sliding saddle drives the translational support seat to move left and right on the crankshaft diameter, thereby realizing that the bow-shaped support frame moves together with the translational support seat. When the abrasive belt on the bow-shaped support frame moves to the designated position, the abrasive belt starts to rotate at a suitable speed before processing. The position of the bow-shaped support frame on the shaft surface is adjusted by the operation of the servo-driven electric cylinder, thereby realizing that the abrasive cloth moves up and down on the shaft diameter during the polishing process, further improving the surface roughness and outer diameter stability of the crankshaft.

[0052] The above description is merely an exemplary embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. The scope of protection of the present utility model is determined by the appended claims.

Claims

1. A crankshaft polishing device, characterized in that, The crankshaft polishing equipment is mounted on a lathe and includes: a base, a slide saddle, a servo-driven electric cylinder, a movable support seat, an arch-shaped support frame, a tensioning device, and a guide shaft. The base is mounted on the left and right support frames of the lathe. A linear guide and four sets of sliders are mounted on the base. Saddles are mounted on the four sets of sliders. A lead screw and a servo motor are mounted under each saddle. A lower connecting hinge seat and a translational support seat are mounted on the upper part of the saddle. A first connecting shaft is located between the lower and upper connecting hinge seats. The upper connecting hinge is located below the servo-driven electric cylinder. The translational support seat is mounted on the saddle. A guide strip is mounted on the upper part of the translational support seat and is slidably connected to a U-shaped sliding groove at the rear of the moving support plate. The servo-driven electric cylinder is rotatably connected to the moving support plate via a connecting bolt mounted at the rear. A variable frequency motor is mounted under the moving support plate, and an arched support frame is mounted at the front. The variable frequency motor drives an abrasive wheel to rotate. A tensioning device and a front abrasive wheel are mounted at the front end of the arched support frame. The tensioning device includes a guide support sleeve and a spring. A guide support shaft is mounted at the front end of the guide support sleeve. The moving support plate slides on a first guide shaft, which is mounted on the left and right support frames.

2. The crankshaft polishing equipment as described in claim 1, characterized in that, The top surface of the base is provided with a guide groove, on which a linear guide rail and a slider are installed. Correspondingly, a positioning step is provided on the bottom surface of the slide saddle, which is used to position and fix the slider.

3. The crankshaft polishing equipment as described in claim 2, characterized in that, The slide saddle is provided with threaded holes. A translation support seat and a lower connecting hinge seat are respectively installed on both sides of the top surface of the slide saddle. The lead screw is connected to the lead screw nut seat on the bottom surface of the slide saddle. The lead screw is controlled to rotate by the servo motor of the base, thereby moving the slide saddle to move left and right on the crank axis.

4. The crankshaft polishing equipment as described in claim 3, characterized in that, The upper part of the translation support base is provided with a guide bar, and correspondingly, the rear part of the movable support plate is provided with a U-shaped sliding groove, and the guide bar is slidably placed inside the U-shaped sliding groove.

5. The crankshaft polishing equipment as described in claim 4, characterized in that, The lower connecting hinge seat is provided with a shaft hole, and correspondingly, the upper connecting hinge seat is provided with a shaft hole, and the first connecting shaft is installed on the two shaft holes.

6. The crankshaft polishing equipment as described in claim 5, characterized in that, The servo-driven electric cylinder has a threaded hole at the bottom and a shaft hole at the top. Correspondingly, the upper connecting hinge is installed on the base of the servo-driven electric cylinder, and the shaft hole is provided on the corresponding connecting bolt. The second connecting shaft is installed on the two shaft holes.

7. The crankshaft polishing equipment as described in claim 6, characterized in that, The movable support plate is provided with threaded holes on the front and rear sides of the upper part. Correspondingly, movable support blocks are installed on the front and rear sides of the movable support plate. The two movable support blocks are provided with threaded holes. The connecting bolts are used to install the rear movable support block, and the bow-shaped support frame is installed on the threaded hole of the front movable support block.

8. The crankshaft polishing equipment as described in claim 7, characterized in that, A movable support sleeve is slidably disposed on the first guide shaft. A shaft hole is provided in the middle of the movable support sleeve. A linear bearing is installed in the middle shaft hole and slidably disposed on the first guide shaft. A threaded hole is provided at the bottom of the movable support sleeve. A movable support plate is installed at the bottom of the movable support sleeve.

9. The crankshaft polishing equipment as described in claim 8, characterized in that, The bow-shaped support frame is provided with a threaded rod at the rear end and a second guide shaft at the front end, and a guide groove on the second guide shaft; correspondingly, the guide support sleeve is provided with a shaft hole and a positioning thread, and a guide groove is provided on the shaft hole. A positioning key is provided in the guide groove of the guide support sleeve and the second guide shaft, which can slide relative to each other during operation. The limit bolt is installed in the positioning hole.

10. The crankshaft polishing equipment as described in claim 9, characterized in that, The lower part of the guide support sleeve is provided with a first positioning shaft of spring, and the lower part of the bow-shaped support frame is provided with a second positioning shaft of spring. The spring is installed between the first positioning shaft and the second positioning shaft. A shaft hole is provided on the side of the guide support sleeve, and the guide support shaft is installed on the shaft hole. The abrasive wheel is installed on the other end of the guide support shaft.

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