Eccentric indexing type clamping equipment for small-curvature ultrasonic rolling diesel engine crankshaft machining technology

Abstract

The utility model discloses eccentric indexing type clamping equipment for a small-curvature ultrasonic rolling diesel engine crankshaft machining technology, and belongs to the field of crankshaft non-traditional machining. An eccentric indexing type clamping device for a small-curvature ultrasonic rolling diesel engine crankshaft machining technology comprises a clamp disc chuck and an eccentric indexing phase adjusting mechanism, one side of the clamp disc chuck is connected with one end of the eccentric indexing phase adjusting mechanism, and the eccentric indexing phase adjusting mechanism comprises an eccentric adjusting mechanism and a phase indexing assembly. The eccentric adjusting mechanism is connected with one side of the clamp disc chuck, the side, away from the clamp disc chuck, of the eccentric adjusting mechanism is connected with the phase indexing adjusting assembly, and the phase indexing adjusting assembly is connected with the crankshaft clamping mechanism. The eccentric adjusting mechanism, the phase indexing adjusting mechanism and the crankshaft clamping mechanism are arranged, the eccentric distance and the phase angle of clamping equipment can be adjusted while a crankshaft is clamped, the machining process is faster, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of special crankshaft processing, and in particular relates to an eccentric indexing clamping device used in a small-curvature ultrasonic rolling diesel engine crankshaft processing technology. Background Art

[0002] With the rapid development of the global economy in the new era, the level of domestic industrial manufacturing technology is constantly improving. As a core product of industrial manufacturing, diesel engines are also experiencing rapid development in manufacturing technology to keep pace with the times. Crankshafts, as a key component, are particularly complex and challenging to manufacture. This is especially true for small-curvature, large-diameter crankshafts used in large-scale equipment. Due to the harsh and complex operating environment, the journals must withstand irregular, alternating impact loads and high torque loads during operation. This makes achieving higher surface hardness, greater wear resistance, and greater impact resistance for these crankshaft journals a pressing issue and demand.

[0003] During processing, the shaft diameter of the crankshaft with small curvature needs to be precisely positioned and clamped. The existing technology cannot precisely position and clamp the shaft diameter of the crankshaft with small curvature, which requires multiple processing during the processing, resulting in a long processing cycle and low work efficiency.

[0004] Therefore, how to provide an eccentric indexing clamping device for small curvature ultrasonic rolling diesel engine crankshaft processing technology is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The main purpose of this utility model is to provide an eccentric indexing clamping device for machining small-curvature ultrasonic rolling diesel engine crankshafts to address the aforementioned technical issues. The device is equipped with an eccentric adjustment mechanism, a phase indexing adjustment mechanism, and a crankshaft clamping mechanism. While clamping the crankshaft, the eccentricity and phase angle of the clamping device can be adjusted simultaneously, making the machining process faster and improving work efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An eccentric indexing clamping device for small-curvature ultrasonic rolling diesel engine crankshaft processing technology includes a clamp faceplate, a clamp faceplate and an eccentric indexing phase adjustment mechanism. One side of the clamp faceplate is connected to one end of the eccentric indexing phase adjustment mechanism. The eccentric indexing phase adjustment mechanism includes an eccentric adjustment mechanism and a phase indexing assembly. The eccentric adjustment mechanism is connected to one side of the clamp faceplate, and the side of the eccentric adjustment mechanism away from the clamp faceplate is connected to the phase indexing adjustment assembly. The phase indexing adjustment assembly is connected to the crankshaft clamping mechanism. The eccentric adjustment mechanism can adjust the eccentric distance of the clamping device, and the phase indexing adjustment assembly can adjust the phase angle of the clamping device. The crank clamping mechanism can meet the clamping and positioning needs of crankshafts of different sizes.

[0008] Furthermore, a stepped through hole parallel to and tangent to the axis but not concentric with the axis is provided below the axis of the clamp disc, a transverse hole column nut is provided at one end of the through hole, and the end of the transverse hole column nut away from the through hole is connected to the eccentric adjustment mechanism, and a T-shaped groove is also provided on one side of the clamp disc, and the T-shaped groove is connected to the eccentric adjustment mechanism.

[0009] Furthermore, the eccentric adjustment mechanism includes an eccentric adjustment slider, which is a stepped boss structure. One end of the eccentric adjustment slider is provided with a T-shaped boss that is adapted to the T-shaped groove so that the eccentric adjustment slider is slidably connected to the clamp faceplate. The eccentric adjustment slider is provided with a groove radially perpendicular to the direction of the cross-hole column nut 1 and the cross-hole column nut 2. The end of the cross-hole column nut 1 close to the eccentric adjustment slider abuts against the inner wall of the groove. An eccentric adjustment screw is provided in the groove. A through hole two is provided on the stepped table surface of the adjusting slider, which passes through the groove vertically. A transverse hole column nut two is provided in the through hole two. The eccentric adjusting screw passes through the threaded holes on the transverse hole column nut two and the transverse hole column nut one. At the same time, a thrust bearing is provided on the eccentric adjusting screw. A stepped cavity is provided on the side of the eccentric adjusting slider away from the clamp disc. A phase division adjustment component is provided in the stepped cavity. A through hole three is radially provided on the inner wall of the stepped cavity, and a handwheel is provided in the through hole three.

[0010] Furthermore, a plurality of locking bolts are provided on the stepped surface of the eccentric adjustment slider, and one end of the locking bolt passes through the eccentric adjustment slider and the T-shaped boss on one side of the eccentric adjustment slider and is connected to the clamp disc.

[0011] The gear train is fixed to the center of the gear train by a plurality of fixed gears, and the gear train is fixed to the center of the gear train by a plurality of fixed gears.

[0012] Furthermore, a side of the eccentric adjustment slider away from the clamp faceplate is fixedly connected to a plurality of indexing plate pressing blocks through a plurality of indexing plate pressing block fixing bolts.

[0013] Furthermore, the crankshaft clamping mechanism includes a lower clamping plate, one end of which is fixed on the dividing plate, and the other end is provided with an arc-shaped connecting block, and is connected to an upper clamping plate through the arc-shaped connecting block. One end of the upper clamping plate and the lower clamping plate arc-shaped connecting block is hinged through a hinged connecting block and two cylindrical pins, and the other end is fixedly connected through a clamping plate fixing bolt. The upper clamping plate and the lower clamping plate are both fixedly connected to the V-block through multiple V-block fixing bolts.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model is equipped with an eccentric adjustment mechanism, a phase indexing adjustment assembly, and a crankshaft clamping mechanism. While clamping the crankshaft, the eccentricity and phase angle of the clamping device can be adjusted, making the machining process faster and improving work efficiency. The eccentric indexing clamping device allows the crankshaft's main journal and connecting rod journal to be machined in one go, eliminating the need for secondary clamping. The machining equipment offers flexible installation and convenient pressure loading. After turning the crankshaft journal, the surface can be directly hardened instead of ground, saving time and effort and reducing machining costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 This is a flow chart of the technical method for machining small-curvature ultrasonic rolling diesel engine crankshafts.

[0018] Figure 2 Schematic diagram of ultrasonic rolling principle.

[0019] Figure 3 This is a schematic diagram of the workpiece layer structure after processing by the utility model.

[0020] Figure 4 Schematic diagram of the structure of the small curvature ultrasonic rolling diesel engine crankshaft processing system.

[0021] Figure 5 It is a schematic diagram of the side structure of the fixture disc.

[0022] Figure 6 This is the principle diagram of phase indexing adjustment of eccentric indexing clamping equipment.

[0023] Figure 7 It is a structural diagram of the present utility model.

[0024] Figure 8 It is a schematic cross-sectional structural diagram of the present utility model.

[0025] Among them, 1- fixture disc; 2- cross hole column nut one; 3- eccentric adjustment screw; 4- cross hole column nut two; 5- eccentric adjustment slider; 6- center shaft; 7- small bevel gear; 8- large bevel gear; 9- indexing plate; 10- center shaft end cover; 11- indexing plate end cover; 12- locking bolt; 13- clamping plate fixing bolt; 14- handwheel; 15- indexing plate pressure block; 16- upper clamping plate; 17- V-block; 18- lower clamping plate; 19- V-block fixing bolt; 20- cylindrical pin; 21- indexing plate pressure block fixing bolt; 22- flat head threaded cylindrical pin; 23- bevel gear fixing bolt; 24- center shaft fixing bolt; 25- small curvature crankshaft journal; 26- ball bearing; 27- ultrasonic amplitude transformer; 28- ultrasonic transducer; 29- ultrasonic generator; 30- machine tool turret; 31- hydraulic-cylinder pressure system. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figure 1 As shown, the utility model provides a small curvature ultrasonic rolling diesel engine crankshaft processing technology method. The specific operation steps are as follows:

[0028] Step 1: Hoist the small curvature diesel engine crankshaft onto the large horizontal lathe through the transport hoisting system and clamp it at both ends of the crankshaft using eccentric indexing fixtures;

[0029] Step 2: Clamp the ultrasonic rolling actuator onto the tool post of the large horizontal lathe and connect the cables, lubricating oil pipes and cylinder-hydraulic pipes, and set the corresponding processing parameters and processing procedures according to the processing requirements;

[0030] Step 3: Start the lathe spindle servo motor to drive the crankshaft to rotate around the lathe spindle;

[0031] Step 4: Start the ultrasonic generator and lubrication supply system through the electrical control system, and control the hydraulic-cylinder pressure system to apply pressure to the ultrasonic rolling actuator. At the same time, control the ultrasonic rolling actuator to feed along the axial direction of the crankshaft journal on its surface to achieve ultrasonic rolling processing on the surface of the small curvature diesel engine crankshaft journal;

[0032] Step 5: Surface quality inspection of the processed crankshaft surface is carried out and qualified products are cleaned and packaged;

[0033] In this embodiment, the processing device in the above-mentioned small curvature ultrasonic rolling diesel engine crankshaft processing technology method is specifically described as follows:

[0034] The ultrasonic generator, ultrasonic transducer, ultrasonic horn and supporting electronic components are combined into an ultrasonic generating system. The ultrasonic generator outputs a high-frequency harmonic alternating voltage after voltage transformation, frequency conversion, rectification and voltage stabilization, which is then loaded onto the piezoelectric ceramic stack of the ultrasonic transducer to output ultrasonic vibrations with stable amplitude, and the amplitude is amplified by the ultrasonic horn.

[0035] The ultrasonic rolling actuator comprises the aforementioned ultrasonic transducer, ultrasonic horn, and mechanical components of the rolling tool head. It also includes the ultrasonic rolling actuator housing, associated fluid and power supply lines, and cylinder hydraulic components. Ultrasonic vibrations generated by the ultrasonic generating system are applied to the rolling tool head, causing it to vibrate at a frequency of 20,000 Hz or higher along the axial direction of the ultrasonic rolling actuator.

[0036] The ultrasonic rolling actuator is installed on the tool post of a large horizontal lathe to perform ultrasonic rolling strengthening on the journal of a small-curvature crankshaft. The ultrasonic rolling actuator can move in the axial direction parallel to the main shaft and in the radial direction perpendicular to the main shaft as the tool post moves.

[0037] The eccentric indexing clamping device includes an eccentric adjustment mechanism, a phase indexing adjustment assembly, and a crankshaft clamping mechanism. The eccentric and phase indexing adjustment mechanisms adjust the eccentricity of crankshafts with different journal sizes and adjust the phase indexing of connecting rod journals with different phase angles during ultrasonic rolling. This allows ultrasonic rolling of all connecting rod journals and main journals with different phase angles to be completed in a single crankshaft clamping operation, improving machining accuracy. This also reduces the labor intensity of workers clamping large-diameter crankshafts with small curvatures, thereby increasing machining efficiency.

[0038] The phase indexing adjustment mechanism uses a handwheel to control the precise meshing between the bevel gears, thereby controlling the error caused by the oversized crankshaft and inconvenient operation during phase indexing adjustment of the small curvature crankshaft journal. At the same time, the evenly distributed equi-angle positioning pin holes on the indexing plate facilitate the adjustment of the crankshaft with the currently common phase angles of 180°, 120°, 90°, etc.

[0039] The eccentric adjustment mechanism and the phase indexing adjustment mechanism transform the complex spatial eccentric rotational motion of the crankshaft connecting rod journal relative to the rotation center during traditional crankshaft rolling into a simple circular motion around the center axis, solving the problems of insufficient rolling force during rolling and the possibility that the contour trajectory of the rolling head may be inconsistent with the journal surface and there is a roundness deviation.

[0040] The hydraulic-pneumatic pressure system is a hydraulic or pneumatic system used to provide static pressure to the ultrasonic actuator. By fixedly connecting the hydraulic or pneumatic system to the ultrasonic rolling actuator, static pressure can be applied to the ultrasonic actuator by changing the hydraulic or pneumatic system.

[0041] The lubrication supply system provides rolling lubricating fluid for the rolling tool head. The lubricating fluid is transported to the rolling tool head along the pipeline through an oil pump. This can solve the problem of local heating generated when the rolling head ball contacts the crankshaft surface during high-frequency vibration rolling, resulting in adhesion and failure between the crankshaft journal surface and the tool head ball.

[0042] A method for ultrasonically rolling a low-curvature diesel engine crankshaft also includes an electrical control system, which encompasses a series of pipelines, electrical components, and control elements that control the ultrasonic generating system, ultrasonic rolling execution system, large horizontal lathe, hydraulic or pneumatic system, lubrication and fluid supply system, electrical control system, surface quality inspection system, and transport and hoisting system. Specifically, this includes the machine tool's inherent control system, which achieves ultrasonic rolling strengthening of low-curvature diesel engine crankshafts through rational and unified coordination and control.

[0043] The surface quality detection system refers to the surface quality detection and measurement of the crankshaft journal surface after ultrasonic rolling processing, specifically including surface hardness measurement, surface roughness measurement, surface residual stress measurement and other technologies.

[0044] The transport and lifting system includes a crane, a remote control, a forklift and other tools.

[0045] like Figures 2 and 3 The following is the specific principle of introducing residual compressive stress by ultrasonic rolling:

[0046] First, due to the static pressure applied by the ball 26 in the rolling direction, a compressive stress field is introduced within a certain thickness range on the surface of the shallow-curvature crankshaft journal 25. Under the action of this stress, the tissue elements within this stress field undergo elastic-plastic deformation within a certain depth range. Initially, under the action of static pressure, a shallow elastic deformation region appears on the surface of the shallow-curvature crankshaft journal 25. Once the internal compressive stress exceeds the yield limit of the crankshaft material, the elastic deformation region, which is subject to the greatest force in contact with the ball 26, transforms into a shallower plastic deformation region. Subsequently, under the combined load of increasing static pressure and ultrasonic vibration, the two regions also continue to grow and extend inward in the radial depth direction of the surface of the small-curvature crankshaft journal 25. The two deformation regions change with the downward pressure and rebound of the ball within a cycle. When the downward pressure of ball 26 reaches the highest amplitude within a vibration cycle, both elastic and plastic deformation reach their maximum, with the elastic deformation exceeding the plastic deformation. When ball 26 rises, the elastic deformation region also rebounds. However, because the plastic deformation region generated during the previous downward pressure is irreversible, the recovery of the elastic deformation region is hindered, and a new equilibrium stress field is generated at the interface of the plastic deformation region. This introduces high residual compressive stress on the surface and interior of the small-curvature crankshaft journal 25.

[0047] like Figure 4 As shown, the structure of the ultrasonic rolling processing system for a small curvature diesel engine crankshaft used in the above-mentioned small curvature ultrasonic rolling diesel engine crankshaft processing technology method includes: a small curvature crankshaft journal 25, an ultrasonic horn 27, an ultrasonic transducer 28, an ultrasonic generator 29, a rolling tool head, a machine tool turret 30 and a hydraulic-cylinder pressure system 31; a ball 26 is provided at one end of the rolling tool head, an output end of the hydraulic-cylinder pressure system 31 is connected to one end of the ultrasonic transducer 28, the other end of the ultrasonic transducer 28 is connected to one end of the ultrasonic horn 27, the other end of the ultrasonic horn 27 is connected to the rolling tool head, and the ultrasonic horn 27, the ultrasonic transducer 28 and the hydraulic-cylinder pressure system 31 are all provided At the top of the machine tool tool holder 30, the ultrasonic transducer 28 is also electrically connected to the ultrasonic generator 29. When ultrasonic rolling is performed on the small curvature diesel engine crankshaft, ultrasonic vibration is first generated by the ultrasonic generator 29, the ultrasonic amplitude transformer 27 and the ultrasonic transducer 28. The ultrasonic vibration is transmitted to the ball 26 of the rolling tool head. At the same time, the static pressure F provided by the hydraulic-cylinder pressure system 31, the ball 26 impacts the uneven surface of the small curvature crankshaft journal 25 with high-frequency ultrasonic vibration. In the process of extrusion and organizational plastic flow, the surface protrusions of the small curvature crankshaft journal 25 are flattened and the depressions are filled, so that the surface of the small curvature crankshaft journal 25 is reduced after processing and strengthening, and a certain amount of residual compressive stress is also introduced.

[0048] The small curvature ultrasonic rolling diesel engine crankshaft processing strengthening technology mainly transmits the ultrasonic vibration generated by the ultrasonic generator to the ball through the ultrasonic amplitude rod and ultrasonic transducer, and installs the ultrasonic actuator on the machine tool turret of the large horizontal lathe. Under the static pressure provided by the hydraulic or cylinder pressure system, the ball impacts the surface of the small curvature crankshaft journal with high-frequency ultrasonic vibration, causing the surface tissue of the small curvature crankshaft journal to undergo plastic flow. The uneven surface is flattened and the depressions are filled in the process of extrusion and tissue flow, so that the surface roughness of the small curvature crankshaft journal is reduced after processing strengthening, and a certain amount of residual compressive stress is introduced. At the same time, work hardening also increases the surface hardness of the small curvature crankshaft journal.

[0049] like Figures 5 to 8 The figure shows an eccentric indexing clamping device for small curvature ultrasonic rolling diesel engine crankshaft processing technology mentioned in the present invention, including a clamp faceplate 1, including a clamp faceplate 1 and an eccentric indexing phase adjustment mechanism, one side of the clamp faceplate 1 is connected to one end of the eccentric indexing phase adjustment mechanism, the eccentric indexing phase adjustment mechanism includes an eccentric adjustment mechanism and a phase indexing assembly, the eccentric adjustment mechanism is connected to one side of the clamp faceplate 1, the side of the eccentric adjustment mechanism away from the clamp faceplate 1 is connected to the phase indexing adjustment assembly, the phase indexing adjustment assembly is connected to the crank clamping mechanism, the eccentric adjustment mechanism can adjust the eccentric distance of the clamping device, the phase indexing adjustment assembly can adjust the phase angle of the clamping device, and the crank clamping mechanism can meet the clamping and positioning needs of crankshafts of different sizes.

[0050] In this embodiment, a through hole 1 is provided at the lower part of the axis of the clamp disc 1, which is parallel to and tangential to the axis but not concentric with the axis. A transverse hole column nut 2 is provided at one end of the through hole, and the end of the transverse hole column nut 2 away from the through hole is connected to the eccentric adjustment mechanism. A T-shaped groove is also provided on one side of the clamp disc 1, and the T-shaped groove is connected to the eccentric adjustment mechanism.

[0051] In this embodiment, the eccentric adjustment mechanism includes an eccentric adjustment slider 5, which is a stepped boss structure. A T-shaped boss that matches the T-shaped groove is provided at one end of the eccentric adjustment slider 5 so that the eccentric adjustment slider 5 is slidably connected to the clamp disc 1. The eccentric adjustment slider 5 is provided with a groove radially perpendicular to the direction of the cross-hole column nut 1 2 and the cross-hole column nut 2 4. The end of the cross-hole column nut 1 2 close to the eccentric adjustment slider 5 abuts against the inner wall of the groove. An eccentric adjustment screw 3 is provided in the groove. A through hole 2 perpendicular to the groove is provided on the stepped surface of the eccentric adjustment slider 5. A transverse hole column nut 2 4 is provided in the through hole 2, and the eccentric adjustment screw 3 passes through the threaded holes on the transverse hole column nut 2 4 and the transverse hole column nut 1 2. At the same time, a thrust bearing is provided on the eccentric adjustment screw 3, and a stepped cavity is provided on the side of the eccentric adjustment slider 5 away from the clamp disc 1, and a phase division adjustment component is provided in the stepped cavity. A through hole 3 is radially provided on the inner wall of the stepped cavity, and a handwheel 14 is provided in the through hole 3; the eccentric distance is adjusted by rotating the eccentric adjustment screw 3 that passes through the transverse hole column nut 4 fixed on the eccentric adjustment slider 5 and drives the transverse hole column nut 2 fixed on the clamp disc 1.

[0052] In this embodiment, a plurality of locking bolts 12 are provided on the stepped surface of the eccentric adjustment slider 5. One end of the locking bolt 12 passes through the eccentric adjustment slider 5 and the T-shaped boss on one side of the eccentric adjustment slider 5 and is connected to the clamp disc 1. The locking bolt 12 is used to lock the eccentric adjustment slider 5 and the eccentric adjustment slider 5.

[0053] In this embodiment, the phase indexing adjustment assembly includes a center shaft 6, a small bevel gear 7, a large bevel gear 8, a dividing plate 9, a center shaft end cover 10, a dividing plate end cover 11, a bearing and a center shaft flange. The center shaft flange is fixed in the stepped cavity by a plurality of center shaft fixing bolts 24. One end of the center shaft 6 passes through the center shaft flange and abuts against the inner wall of the stepped groove. The other end away from the fixed end is sleeved with a large bevel gear 8. The large bevel gear 8 is fixed to one side of the dividing plate 9 by a bevel gear fixing bolt 23. The dividing plate 9 and the large bevel gear 8 are sleeved on the bearing at the axis. The bearing is sleeved on the center shaft 6. The dividing plate 9 is radially threaded with a flat head. The cylindrical pin 22 is connected to the eccentric adjustment slider 5, and the bottom end of the handwheel 14 is connected to the small bevel gear 7, and the small bevel gear 7 and the large bevel gear 8 are meshed with each other. The end of the center shaft 6 close to the indexing plate 9 abuts on the center shaft end cover 10, and the other side of the center shaft end cover 10 abuts on the indexing plate end cover 11. The center shaft end cover 10 and the indexing plate end cover 11 are both fixed to the indexing plate 9 by screws; when the handwheel 14 rotates, it can drive the small bevel gear 7 to rotate, and the small bevel gear 7 drives the large bevel gear 8 and the indexing plate 9 to rotate; when the indexing plate 9 is at a suitable angle, the indexing plate 9 is angularly positioned by the flat-head threaded cylindrical pin 22 and fixed by the indexing plate pressure block 15.

[0054] In this embodiment, the side of the eccentric adjustment slider 5 away from the clamp disc 1 is fixedly connected to multiple dividing plate pressure blocks 15 through multiple dividing plate pressure block fixing bolts 21. The dividing plate pressure blocks 15 can press the dividing plate 9 onto the eccentric adjustment slider 5 to prevent the dividing plate 9 from rotating.

[0055] In this embodiment, the crankshaft clamping mechanism includes a lower clamping plate 18, one end of the lower clamping plate 18 is fixed on the dividing plate 9, and the other end is provided with an arc-shaped connecting block, and is connected to the upper clamping plate 16 through the arc-shaped connecting block. One end of the arc-shaped connecting block of the upper clamping plate 16 and the lower clamping plate 18 is hinged through a hinged connecting block and two cylindrical pins 20, and the other end is fixedly connected by a clamping plate fixing bolt 13. The upper clamping plate 16 and the lower clamping plate 18 are both fixedly connected to the V-block 17 through multiple V-block fixing bolts 19; V-blocks of different sizes can be assembled as needed to meet the clamping and positioning of crankshafts of different sizes.

[0056] Working principle: When the clamping device is working, first, according to the eccentricity adjustment mechanism, the eccentricity adjustment screw 3 that passes through the cross-hole column nut 4 fixed on the eccentricity adjustment slider 5 is rotated according to the eccentricity distance between the crankshaft main journal and the connecting rod journal, and the cross-hole column nut 1-2 fixed on the clamp faceplate 1 is driven to adjust the eccentricity. Then, the crankshaft is fixed by the crankshaft clamping mechanism of the clamping device. After the processing of a connecting rod journal is completed, the indexing plate pressure block 15 is released, and the handwheel 14 is turned to make the small bevel gear 7 drive the large bevel gear 8 to rotate and drive the fixed crankshaft workpiece to rotate a certain phase angle. The required phase angle is accurately positioned using the indexing plate 9 and the flat-head threaded cylindrical pin 22 on the indexing plate 9. Then, the indexing plate pressure block 15 is tightened to press the indexing plate 9 to achieve the phase indexing adjustment of the connecting rod journal. When processing the main journal of the crankshaft, it is only necessary to adjust the eccentricity to zero.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0058] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An eccentric indexing clamping device for small curvature ultrasonic rolling diesel engine crankshaft processing technology, characterized in that: The invention comprises a clamp faceplate (1) and an eccentric indexing phase adjustment mechanism, wherein one side of the clamp faceplate (1) is connected to one end of the eccentric indexing phase adjustment mechanism, and the eccentric indexing phase adjustment mechanism comprises an eccentric adjustment mechanism and a phase indexing assembly, wherein the eccentric adjustment mechanism is connected to one side of the clamp faceplate (1), and the side of the eccentric adjustment mechanism away from the clamp faceplate (1) is connected to the phase indexing adjustment assembly, and the phase indexing adjustment assembly is connected to the crankshaft clamping mechanism, wherein the eccentric adjustment mechanism can adjust the eccentricity of the clamping device, and the phase indexing adjustment assembly can adjust the phase angle of the clamping device, and the crankshaft clamping mechanism can clamp and position the crankshaft; A through hole 1 is provided at the lower part of the axis of the clamp faceplate (1), which is parallel to and tangential to the axis but not concentric with the axis. A transverse hole column nut 1 (2) is provided at one of the through holes. The end of the transverse hole column nut 1 (2) away from the through hole is connected to the eccentric adjustment mechanism. A T-shaped groove is also provided on one side of the clamp faceplate (1), and the T-shaped groove is connected to the eccentric adjustment mechanism. The eccentric adjustment mechanism includes an eccentric adjustment slider (5), the eccentric adjustment slider (5) is a stepped boss structure, one end of the eccentric adjustment slider (5) is provided with a T-shaped boss adapted to the T-shaped groove so that the eccentric adjustment slider (5) is slidably connected to the clamp faceplate (1), the eccentric adjustment slider (5) is provided with a groove in a radial direction perpendicular to the direction of the transverse hole column nut (2) and the transverse hole column nut (4), the end of the transverse hole column nut (2) close to the eccentric adjustment slider (5) abuts against the inner wall of the groove, an eccentric adjustment screw (3) is provided in the groove, and the eccentric A through hole 2 is provided on the stepped surface of the adjusting slider (5) and passes through the groove vertically. A transverse hole column nut 2 (4) is provided in the through hole 2. The eccentric adjusting screw (3) passes through the threaded holes on the transverse hole column nut 2 (4) and the transverse hole column nut 1 (2). At the same time, a thrust bearing is provided on the eccentric adjusting screw (3). A stepped cavity is provided on the side of the eccentric adjusting slider (5) away from the clamp faceplate (1). A phase division adjustment component is provided in the stepped cavity. A through hole 3 is radially provided on the inner wall of the stepped cavity. A hand wheel (14) is provided in the through hole 3.

2. The eccentric indexing clamping device for small curvature ultrasonic rolling diesel engine crankshaft processing technology according to claim 1 is characterized by: A plurality of locking bolts (12) are provided on the stepped surface of the eccentric adjustment slider (5), one end of the locking bolt (12) passes through the eccentric adjustment slider (5) and the T-shaped boss on one side of the eccentric adjustment slider (5) and is connected to the clamp faceplate (1).

3. The eccentric indexing clamping device for small curvature ultrasonic rolling diesel engine crankshaft processing technology according to claim 1 is characterized by: The phase indexing adjustment assembly comprises a central shaft (6), a small bevel gear (7), a large bevel gear (8), a dividing plate (9), a central shaft end cover (10), a dividing plate end cover (11), a bearing and a central shaft flange, wherein the central shaft flange is fixed in a stepped cavity by a plurality of central shaft fixing bolts (24), one end of the central shaft (6) passes through the central shaft flange and abuts against the inner wall of the stepped groove, and the other end is sleeved with a large bevel gear (8), the large bevel gear (8) is fixed to one side of the dividing plate (9) by a bevel gear fixing bolt (23), and the axis of the dividing plate (9) and the large bevel gear (8) is sleeved on the shaft. The bearing sleeve is mounted on the central shaft (6), the indexing plate (9) is radially connected to the eccentric adjustment slider (5) through a flat-head threaded cylindrical pin (22), the bottom end of the hand wheel (14) is connected to a small bevel gear (7), the small bevel gear (7) and the large bevel gear (8) are meshed with each other, one end of the central shaft (6) close to the indexing plate (9) abuts against the central shaft end cover (10), the other side of the central shaft end cover (10) abuts against the indexing plate end cover (11), the central shaft end cover (10) is fixed to the central shaft (6) by screws, and the indexing plate end cover (11) is fixed to the indexing plate (9) by screws.

4. The eccentric indexing clamping device for small curvature ultrasonic rolling diesel engine crankshaft processing technology according to claim 3 is characterized by: The side of the eccentric adjustment slider (5) away from the clamp faceplate (1) is fixedly connected to a plurality of indexing plate pressure blocks (15) via a plurality of indexing plate pressure block fixing bolts (21).

5. The eccentric indexing clamping device for small curvature ultrasonic rolling diesel engine crankshaft processing technology according to claim 3 is characterized by: The crankshaft clamping mechanism includes a lower clamping plate (18), one end of which is fixed on the indexing plate (9), and the other end is provided with an arc-shaped connecting block, and is connected to the upper clamping plate (16) through the arc-shaped connecting block. One end of the arc-shaped connecting block of the upper clamping plate (16) and the lower clamping plate (18) is hinged through a hinged connecting block and two cylindrical pins (20), and the other end is fixedly connected through a clamping plate fixing bolt (13). The upper clamping plate (16) and the lower clamping plate (18) are both fixedly connected to the V-block (17) through a plurality of V-block fixing bolts (19).

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