CN111673201B - Method for improving accuracy of torsion bar shaft spline and product thereof - Google Patents
Method for improving accuracy of torsion bar shaft spline and product thereof Download PDFInfo
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- CN111673201B CN111673201B CN202010559766.9A CN202010559766A CN111673201B CN 111673201 B CN111673201 B CN 111673201B CN 202010559766 A CN202010559766 A CN 202010559766A CN 111673201 B CN111673201 B CN 111673201B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/20—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
- B23F23/02—Loading, unloading or chucking arrangements for workpieces
- B23F23/06—Chucking arrangements
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Abstract
The method for improving the accuracy of the splines at the two ends of the torsion bar shaft is characterized in that torque is transmitted to the middle section of the torsion bar shaft to drive the torsion bar shaft to rotate, the splines are synchronously machined at the two ends of the torsion bar shaft by adopting a hobbing cutter of a double-head gear machine tool, the machining accuracy of the splines at the two ends of the torsion bar shaft is improved and the deviation of the splines at the two ends of the torsion bar shaft is reduced by finely adjusting the coaxiality and the circular runout of the two ends of the torsion bar shaft and improving the straightness and rigidity of the torsion bar shaft before machining, so that the accuracy grade of the splines at the two ends of the torsion bar shaft is improved. The invention overcomes the defect that the slender torsion bar shaft spline is easy to deform due to gravity and torque transmission in the processing process, improves the stability of the torsion bar shaft in the processing process of the spline, thereby improving the processing precision of the spline, reducing the height deviation of addendum circles of the splines at two ends and the angle deviation of corresponding teeth, and ensuring that the angle deviation of a torsion arm connected with the spline is not more than 0.2 degrees. The invention also provides a torsion bar shaft processed by the method for improving the spline precision of the torsion bar shaft.
Description
Technical Field
The invention relates to a method for improving the accuracy of a torsion bar shaft spline and a product thereof, which are used for processing the torsion bar shaft end part spline.
Background
According to the design and technological assembly requirements of a bogie, the current collection modes of a torsion bar shaft and a torsion arm at home and abroad mainly comprise three modes: 1) the torsion arm and the torsion bar shaft are in interference fit through the hot jacket cylindrical surface, the torsion bar shaft and the torsion arm cannot be disassembled after the structure is assembled, and the torsion arm and the torsion bar shaft of the structure are easy to slip in the circumferential direction if the interference is not enough and are easy to slip under the condition of large limit vertical load; 2) the torsion arm and the torsion bar shaft are in clearance fit through the spline, and then the torsion arm and the torsion bar shaft are pressed and loosened through the fastening fitting, the structure is detachable and convenient to install, but due to the fact that the spline has a clearance, if the clearance is too large, impact load exists in the structure in use, the spline part is easy to lose efficacy, and the structure is only suitable for small load; 3) the torsion bar shaft and the torsion arm are of an integral structure, namely the torsion bar shaft and the torsion arm are directly replaced by one part without assembly, but the problems of difficult manufacture, more limitation of the bogie structure on installation, suitability for small load and the like exist;
in recent years, along with the requirements of rail transit on running speed and comfort are higher and higher, the reliability requirement of the anti-rolling torsion bar is higher and higher, and the reliability of the anti-rolling torsion bar is particularly required to be ensured under the high safety factor of the high-speed motor train required at present. For the whole anti-rolling torsion bar system, the matching of the torsion arm and the torsion bar shaft is a key item influencing the reliability of the anti-rolling torsion bar. In order to meet the requirement of convenient installation of a torsion bar system, a detachable torsion bar needs to be connected by a spline, in order to improve the reliability of the anti-rolling torsion bar and ensure the detachable convenience, the spline is matched and is more closed after being connected, the stress of a connecting part is more uniform, and the requirements of large load and high reliability can be met. Meanwhile, because the torsion bar shaft belongs to a slender shaft part, the spline machining difficulty is high, the precision requirement is further improved, the machining difficulty is increased, and a new shaft spline machining method needs to be researched to meet the design requirement.
Disclosure of Invention
The invention provides a method for improving the spline precision of a torsion bar shaft and a product thereof, which improves the processing method for processing splines by one end of the torsion bar shaft for transmitting torque and the other end of the torsion bar shaft in the prior art into a method for synchronously processing the splines by transmitting torque in the middle, finely adjusts the coaxiality and the circular run-out of the two ends of the torsion bar shaft before processing so as to ensure that the coaxiality and the circular run-out of addendum circles of the splines processed at the two ends are the same, overcomes the defect that the slender torsion bar shaft is easy to deform due to gravity and torque transmission in the processing process by improving the straightness and the rigidity of the torsion bar shaft before processing, improves the stability of the torsion bar shaft in the processing process of the splines, improves the processing precision of the splines, reduces the height deviation of the addendum circles of the splines at the two ends and the angle deviation of corresponding teeth, and ensures that the angle deviation of a torsion arm connected with the splines is not more than 0.2 degree.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for improving the accuracy of the splines at the two ends of the torsion bar shaft is characterized in that torque is transmitted to the middle section of the torsion bar shaft to drive the torsion bar shaft to rotate, the splines are synchronously machined at the two ends of the torsion bar shaft by adopting a hobbing cutter of a double-head gear machine tool, the machining accuracy of the splines at the two ends of the torsion bar shaft is improved and the deviation of the splines at the two ends of the torsion bar shaft is reduced by finely adjusting the coaxiality and the circular runout of the two ends of the torsion bar shaft and improving the straightness and rigidity of the torsion bar shaft before machining, so that the accuracy grade of the splines at the two ends of the torsion bar shaft is improved.
Preferably, the synchronous processing of the spline at the two ends of the torsion bar shaft comprises the following steps:
firstly, controlling the diameter tolerance of two ends of a torsion bar shaft within 0-0.03mm, then installing the torsion bar shaft on a double-head gear machine tool, clamping the torsion bar shaft by using an apex and respectively matching a hobbing cutter with the end part of the torsion bar shaft;
correcting the coaxiality of two ends of the torsion bar shaft and the circular runout of the end part of the torsion bar shaft to ensure that the coaxiality of the two ends of the torsion bar shaft is not more than 0.01mm and the circular runout of the end part of the torsion bar shaft is not more than 0.02 mm;
supporting the middle section of the torsion bar shaft to improve the straightness of the torsion bar shaft, clamping the middle section of the torsion bar shaft to improve the rigidity of the torsion bar shaft, and transmitting torque to the middle section of the torsion bar shaft after clamping to drive the torsion bar shaft to rotate;
fourthly, the hobbing cutter is started again, and the spline is synchronously processed at the two ends of the torsion bar shaft.
Preferably, the step one of "clamping the torsion bar shaft by the tip" means: the method comprises the steps of firstly selecting an extension bar capable of being in threaded connection with the end part of a torsion bar shaft, then machining a clamping hole matched with an apex on the end face of the free end of the extension bar, then coaxially connecting the extension bar to the end part of the torsion bar shaft, and finally matching the apex with the clamping hole of the extension bar to clamp the torsion bar shaft.
Preferably, step two specifically means: the extension bar is clamped by a chuck matched with the tip, the height of the extension bar is finely adjusted by the chuck, the coaxiality of the extension bars at two ends of the torsion bar shaft is not more than 0.01mm, and the circle bounce is not more than 0.02mm, so that the coaxiality of two ends of the torsion bar shaft is not more than 0.01mm, the circle bounce at the end part of the torsion bar shaft is not more than 0.02mm, and the chuck is loosened to clamp the extension bar after the fine adjustment is completed.
Preferably, the third step is to clamp the middle section of the torsion bar shaft by using the jacket, rotatably mount the jacket on the support frame, and drive the jacket to rotate, thereby driving the torsion bar shaft to rotate.
Preferably, the clamping length of the clamping sleeve to the middle section of the torsion bar shaft is 1/10-1/8 of the total length of the torsion bar shaft, and after the clamping sleeve is clamped to the middle section of the torsion bar shaft, the straightness and the circular runout of the middle section of the torsion bar shaft are adjusted through the clamping sleeve, so that the straightness of the torsion bar shaft and the circular runout of the middle section of the torsion bar shaft are not more than 0.04 mm.
Preferably, the jacket comprises a jacket body in clearance fit with the torsion bar shaft and adjusting bolts arranged on the jacket body, the adjusting bolts are arranged on the jacket body in a radial thread fit mode, the inner ends of the adjusting bolts are in contact with the torsion bar shaft, the number of the adjusting bolts is at least two, the middle section of the torsion bar shaft is clamped by the adjusting bolts, and the straightness and clamping force of the middle section of the torsion bar shaft are finely adjusted through the adjusting bolts, so that the straightness and circular runout of the middle section of the torsion bar shaft are not more than 0.04 mm.
Preferably, the number of the adjusting bolts is four, two adjusting bolts are arranged above the torsion bar shaft, the other two adjusting bolts are symmetrically arranged below the torsion bar shaft, the adjusting bolts are close to the end part of the sleeve body, the pressure of each adjusting bolt on the torsion bar shaft is adjusted, so that the straightness of the middle section of the torsion bar shaft is accurately adjusted, the straightness of the middle section of the torsion bar shaft is enabled not to exceed 0.04mm, and the clamping force borne by the middle section of the torsion bar shaft is adjusted, so that the circular runout of the middle section of the torsion bar shaft is enabled not to exceed 0.04 mm.
Preferably, after the straightness of the torsion bar shaft and the circle of the middle section of the torsion bar shaft are adjusted to jump, the sleeve body is clamped by a chuck on a double-head gear machine tool, the chuck is fixed with the support frame, the sleeve body is driven to rotate by the chuck, and the outer wall of the sleeve body is ground before use, so that the roundness and the straightness of the outer wall of the sleeve body reach 0.02 mm.
The torsion bar shaft processed by the method for improving the spline precision of the torsion bar shaft is characterized in that the height difference of tooth tops of splines at two ends of the torsion bar shaft is not more than +/-0.2 mm, and the circumferential angle difference of the corresponding tooth tops of the splines at the two ends of the torsion bar shaft is not more than 0.2 degrees.
The invention has the beneficial effects that:
1. the invention transmits torque to the middle section of the torsion bar shaft to drive the torsion bar shaft to rotate, and synchronously processes splines at two ends of the torsion bar shaft by adopting a hobbing cutter of a double-head gear machine tool, namely, the processing method for processing the splines at one end and the other end of the torsion bar shaft in the prior art is improved into a method for processing the splines at the middle transmission torque and the two ends synchronously, the coaxiality and the circular run-out at two ends of the torsion bar shaft are finely adjusted before processing so as to ensure that the coaxiality and the circular run-out of addendum circles of the splines processed at two ends are the same, the defect that the slender torsion bar shaft is easy to deform due to gravity and torque transmission in the processing process is overcome by improving the straightness and rigidity of the torsion bar shaft before processing, the stability of the torsion bar shaft in the processing process is improved, the processing precision of the splines is improved, the height deviation of the addendum circles of the splines at two ends and the angle deviation of corresponding teeth are reduced, and the precision grade number of the splines at two ends of the torsion bar shaft is improved from grade 7 to grade 4, so that the angular deviation of the torsion arm connected with the spline does not exceed 0.2 degrees.
2. The extension bars are connected at the two ends of the torsion bar shaft, so that splines can be machined from the end face of the torsion bar shaft conveniently, the coaxiality and the circle of the extension bars at the two ends can be accurately adjusted to jump through the chuck matched with the tip after the extension bars are connected, the accurate adjustment of the coaxiality and the circle of the two ends of the torsion bar shaft can be realized, the operation of the accurate adjustment process is convenient, and the selection of the spline machining position of the end face of the torsion bar shaft is not influenced.
3. The middle section of the torsion bar shaft is clamped by the clamping sleeve, the clamping sleeve is supported by the supporting frame, the middle section of the torsion bar shaft is effectively supported and is not deformed due to gravity, the coaxiality of the middle section and two ends of the torsion bar shaft is improved, the straightness of the torsion bar shaft is improved, the clamping stress of the middle section of the torsion bar shaft is adjusted through the adjusting bolt in the clamping sleeve, the rigidity of the torsion bar shaft is improved, the torsion bar shaft made of spring steel is not deformed due to torque stress in the rotation process of the torsion bar shaft, and the circular runout of the middle section of the torsion bar shaft meets the design requirement.
4. Chuck centre gripping cover body on the double-end gear lathe makes the cover body can not produce radial vibration at the rotation in-process to guarantee that the torsion bar axle can not produce the vibration at the rotation in-process, further improve the accurate nature of spline processing, so that the spline precision satisfies the design requirement.
Drawings
Fig. 1 is a schematic view of a torsion bar shaft mounted on a double-ended gear machine tool for spline machining.
FIG. 2 is a schematic view of the jacket mounted in the middle section of the torsion bar shaft.
Detailed Description
The following describes an embodiment of the present invention in detail with reference to fig. 1 to 2.
The method for improving the accuracy of the splines of the torsion bar shaft is characterized in that torque is transmitted to the middle section of the torsion bar shaft 1 to drive the torsion bar shaft 1 to rotate, splines are synchronously processed at two ends of the torsion bar shaft by adopting a hobbing cutter of a double-head gear machine tool, the processing accuracy of the splines at the two ends of the torsion bar shaft 1 is improved and the deviation of the splines at the two ends of the torsion bar shaft 1 is reduced by accurately adjusting the coaxiality and circular runout of the two ends of the torsion bar shaft 1 and improving the straightness and rigidity of the torsion bar shaft before processing, so that the accuracy grade of the splines at the two ends of the torsion bar shaft 1 is improved.
The method for improving the accuracy of the spline of the torsion bar shaft transmits the torque to the middle section of the torsion bar shaft to drive the torsion bar shaft to rotate, and synchronously processes the spline at two ends of the torsion bar shaft by adopting the hobbing cutter of the double-head gear machine tool, namely, the processing method for processing the spline at one end of the torsion bar shaft and the other end of the torsion bar shaft in the prior art is improved into a method for processing the spline at the middle end by transmitting the torque, the spline at two ends is precisely adjusted before processing, so as to ensure that the coaxiality and the circular run-out of the addendum circles of the spline processed at two ends are the same, and the defect that the slender torsion bar shaft is easy to deform due to gravity and torque transmission in the processing process is overcome by improving the straightness and the rigidity of the torsion bar shaft before processing, so that the stability of the torsion bar shaft in the processing process is improved, the processing accuracy of the spline is improved, and the height deviation of the addendum circles of the spline at two ends and the angle deviation of the corresponding teeth are reduced, the accuracy grade of the splines at two ends of the torsion bar shaft is improved from 7 grade to 4 grade, and the angle deviation of the torsion arm connected with the splines is not more than 0.2 degrees.
Wherein, synchronous processing spline in torsion bar axle both ends includes the following step:
firstly, controlling the diameter tolerance of two ends of a torsion bar shaft within 0-0.03mm, then installing the torsion bar shaft 1 on a double-head gear machine tool, clamping the torsion bar shaft 1 by using an apex and respectively matching a hobbing cutter with the end part of the torsion bar shaft 1;
correcting the coaxiality of two ends of the torsion bar shaft and the circular runout of the end part of the torsion bar shaft to ensure that the coaxiality of the two ends of the torsion bar shaft is not more than 0.01mm and the circular runout of the end part of the torsion bar shaft is not more than 0.02 mm;
supporting the middle section of the torsion bar shaft to improve the straightness of the torsion bar shaft 1, clamping the middle section of the torsion bar shaft 1 to improve the rigidity of the torsion bar shaft 1, and transmitting torque to the middle section of the torsion bar shaft 1 after clamping to drive the torsion bar shaft 1 to rotate;
fourthly, the hobbing cutter is started again, and the spline is synchronously processed at the two ends of the torsion bar shaft 1.
As shown in fig. 1, a hobbing cutter 4 on the double-ended gear machine tool is respectively matched with the end part of a torsion bar shaft 1, splines are synchronously processed at two ends of the torsion bar shaft 1 along with the rotation of the torsion bar shaft 1, the torsion bar shaft 1 is clamped and positioned on the double-ended gear machine tool through an apex 5, and an intermediate shaft of the torsion bar shaft 1 is supported, so that the middle of the torsion bar shaft 1 is deformed due to gravity in the rotation process of the upper torsion bar shaft 1, and the middle section of the torsion bar shaft 1 is clamped, thereby effectively improving the rigidity of the middle section, enabling the torsion bar shaft 1 made of spring steel materials not to be deformed due to the transmission of torque, ensuring that the two ends of the torsion bar shaft 1 cannot be deformed due to torsion in the rotation process of the torsion bar shaft 1, and further improving the accuracy of the spline processing of the torsion bar shaft.
Wherein, the step one of clamping the torsion bar shaft 1 by using the centre means that: the method comprises the steps of firstly selecting an extension bar 11 capable of being in threaded connection with the end portion of a torsion bar shaft 1, then machining a clamping hole matched with an apex on the end face of the free end of the extension bar 11, then coaxially connecting the extension bar 11 to the end portion of the torsion bar shaft 1, and finally matching the apex with the clamping hole of the extension bar 11 to clamp the torsion bar shaft. The spline position of the end part of the torsion bar shaft 1 is determined by the mounting position of the torsion arm, so that the extension bars are connected with the two ends of the torsion bar shaft, the spline can be conveniently processed from the end surface of the torsion bar shaft, and the coaxiality and the circular runout of the extension bars at the two ends are accurately adjusted through the chuck matched with the tip after the extension bars are connected, so that the accurate adjustment of the coaxiality and the circular runout at the two ends of the torsion bar shaft is realized, the operation of the accurate adjustment process is convenient, and the selection of the spline processing position of the end surface of the torsion bar shaft is not influenced.
Wherein, the step two specifically refers to: the extension bar 11 is clamped by a chuck matched with the tip, the height of the extension bar 11 is finely adjusted by the chuck, the coaxiality of the extension bar 11 at the two ends of the torsion bar shaft is not more than 0.01mm, and the circle bounce is not more than 0.02mm, so that the coaxiality of the two ends of the torsion bar shaft is not more than 0.01mm, the circle bounce at the end part of the torsion bar shaft is not more than 0.02mm, and the chuck is loosened to clamp the extension bar 11 after the fine adjustment is completed. Through the height of chuck fine setting extension bar 11, make the extension bar height at torsion bar axle both ends equal to make the axiality and the circle at torsion bar axle both ends beat and accord with the design demand, the chuck is in the lathe moreover with top supporting part, adjusts convenient simple, the precision is high.
The third step specifically includes clamping the middle section of the torsion bar shaft 1 by using the jacket 2, rotatably installing the jacket 2 on the support frame 3, and driving the jacket 2 to rotate so as to drive the torsion bar shaft 1 to rotate. The clamping sleeve 2 is used for clamping the middle section of the torsion bar shaft, transmitting torque to the middle section of the torsion bar shaft to drive the torsion bar shaft to rotate, and is used for adjusting the straightness and clamping force of the middle section of the torsion bar shaft so as to improve the rigidity of the torsion bar shaft, so that the stability of the torsion bar shaft in the rotating process is better, the middle section of the torsion bar shaft is not subjected to bending deformation due to gravity and torsional deformation due to torque transmission in the rotating process, the torsion bar shaft is ensured to rotate around the central axis, the end part of the torsion bar shaft is prevented from deforming or vibrating, and therefore the spline machining accuracy is improved, and the spline precision meets the design requirements.
The clamping length of the jacket 2 to the middle section of the torsion bar shaft is 1/10-1/8 of the total length of the torsion bar shaft 1, and after the jacket 2 is clamped to the middle section of the torsion bar shaft 1, the straightness and circular runout of the middle section of the torsion bar shaft 1 are adjusted through the jacket 2, so that the straightness and circular runout of the middle section of the torsion bar shaft 1 are not more than 0.04 mm. The length of the jacket 2 is changed by the length change of the torsion bar shaft, the longer the length of the torsion bar shaft is, the longer the length of the jacket is, the clamping of the jacket 2 to the middle section of the torsion bar shaft can effectively improve the rigidity of the torsion bar shaft, and the torsion bar shaft is protected from deformation or vibration caused by rotation.
The jacket 2 comprises a jacket body 21 in clearance fit with the torsion bar shaft 1 and adjusting bolts 22 arranged on the jacket body 21, the adjusting bolts 22 are arranged on the jacket body 21 in a threaded fit manner along the radial direction, the inner ends of the adjusting bolts are in contact with the torsion bar shaft 1, the number of the adjusting bolts 22 is at least two, the middle section of the torsion bar shaft 1 is clamped by the adjusting bolts 22, and the straightness and the clamping force of the middle section of the torsion bar shaft 1 are precisely adjusted through the adjusting bolts 22, so that the straightness and the circular runout of the middle section of the torsion bar shaft 1 are not more than 0.04 mm. The pressure of the adjusting bolt 22 on the torsion bar shaft can be changed by screwing the adjusting bolt 22, namely, the position of the middle section of the torsion bar shaft in the sleeve body 21 is adjusted, so that the torsion bar shaft and the sleeve body 21 are accurately coaxial, the straight line section of the middle section of the torsion bar shaft is ensured, meanwhile, the pressure applied to the torsion bar shaft by the adjusting bolt can effectively clamp the middle section of the torsion bar shaft, the middle section of the torsion bar shaft is ensured not to be subjected to torsional deformation due to torque transmission, the rigidity of the torsion bar shaft is effectively improved, and the stability of the torsion bar shaft in the rotating process is improved.
The number of the adjusting bolts 22 is four, two adjusting bolts are arranged above the torsion bar shaft 1, the other two adjusting bolts are symmetrically arranged below the torsion bar shaft 1, the adjusting bolts 22 are close to the end portion of the sleeve body 21, the pressure of each adjusting bolt 22 on the torsion bar shaft 1 is adjusted, the straightness of the middle section of the torsion bar shaft 1 is accurately adjusted, the straightness of the middle section of the torsion bar shaft 1 is enabled not to exceed 0.04mm, the clamping force applied to the middle section of the torsion bar shaft 1 is adjusted, and the circular runout of the middle section of the torsion bar shaft 1 is enabled not to exceed 0.04 mm. As shown in fig. 2, the four adjusting bolts are distributed in a rectangular shape, and by adjusting each adjusting bolt, the middle section of the torsion bar shaft can be subjected to radial fine adjustment, so that the straightness of the torsion bar shaft is ensured, and meanwhile, the middle section of the torsion bar shaft can be effectively clamped by the adjusting bolts which are symmetrical up and down, so that the rigidity of the torsion bar shaft is effectively improved.
After the straightness of the torsion bar shaft 1 and the circular runout of the middle section of the torsion bar shaft 1 are adjusted, the sleeve body 21 is clamped by a chuck on a double-head gear machine tool, the chuck is fixed with the support frame 3, the sleeve body 21 is driven to rotate by the chuck, and the outer wall of the sleeve body 21 is ground before use, so that the roundness and the straightness of the outer wall of the sleeve body 21 reach 0.02 mm. The sleeve body 21 is clamped by the chuck, so that the sleeve body 21 cannot generate radial vibration in the rotating process, the torsion bar shaft cannot generate vibration in the rotating process, and the spline machining accuracy is further improved.
The invention also protects a torsion bar shaft processed by the method for improving the spline precision of the torsion bar shaft, which is characterized in that the height difference of tooth tops of splines at two ends of the torsion bar shaft 1 is not more than +/-0.2 mm, the circumferential angle difference of corresponding teeth of the splines at two ends of the torsion bar shaft 1 is not more than 0.2 degrees, the spline precision series at two ends of the torsion bar shaft is promoted from 7 levels to 4 levels, the angle deviation of a torsion arm connected with the splines is not more than 0.2 degrees, and the installation requirements of the torsion arms at two ends of the torsion bar shaft are met.
The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Claims (4)
1. The method for improving the spline accuracy of the torsion bar shaft is characterized in that torque is transmitted to the middle section of the torsion bar shaft (1) to drive the torsion bar shaft (1) to rotate, splines are synchronously processed at two ends of the torsion bar shaft by adopting a hobbing cutter of a double-head gear machine tool, the processing accuracy of the splines at two ends of the torsion bar shaft (1) is improved by finely adjusting the coaxiality and circular runout of the two ends of the torsion bar shaft (1) and improving the straightness and rigidity of the torsion bar shaft before processing, and the deviation of the splines at two ends of the torsion bar shaft (1) is reduced, so that the accuracy grade of the splines at two ends of the torsion bar shaft (1) is improved;
the synchronous processing of the spline at the two ends of the torsion bar shaft comprises the following steps:
firstly, controlling the diameter tolerance of two ends of a torsion bar shaft within 0-0.03mm, then installing the torsion bar shaft (1) on a double-end gear machine tool, clamping the torsion bar shaft (1) by using an apex and respectively matching a hobbing cutter with the end part of the torsion bar shaft (1);
correcting the coaxiality of two ends of the torsion bar shaft and the circular runout of the end part of the torsion bar shaft to ensure that the coaxiality of the two ends of the torsion bar shaft is not more than 0.01mm and the circular runout of the end part of the torsion bar shaft is not more than 0.02 mm;
thirdly, supporting the middle section of the torsion bar shaft to improve the straightness of the torsion bar shaft (1), clamping the middle section of the torsion bar shaft (1) to improve the rigidity of the torsion bar shaft (1), and transmitting torque to the middle section of the torsion bar shaft (1) after clamping to drive the torsion bar shaft (1) to rotate;
fourthly, starting the hobbing cutter again, and synchronously processing spline keys at two ends of the torsion bar shaft (1);
the step I of clamping the torsion bar shaft (1) by using the tip refers to the following steps: firstly, selecting an extension bar (11) which can be in threaded connection with the end part of the torsion bar shaft (1), then processing a clamping hole matched with the tip on the end surface of the free end of the extension bar (11), then coaxially connecting the extension bar (11) to the end part of the torsion bar shaft (1), and finally matching the tip with the clamping hole of the extension bar (11) to clamp the torsion bar shaft;
step three, clamping the middle section of the torsion bar shaft (1) by using a jacket (2), rotatably installing the jacket (2) on a support frame (3), and driving the jacket (2) to rotate so as to drive the torsion bar shaft (1) to rotate;
the clamping length of the jacket (2) to the middle section of the torsion bar shaft is 1/10-1/8 of the total length of the torsion bar shaft (1), after the jacket (2) is clamped to the middle section of the torsion bar shaft (1), the straightness and circular runout of the middle section of the torsion bar shaft (1) are adjusted through the jacket (2), and the straightness and circular runout of the middle section of the torsion bar shaft (1) are not more than 0.04 mm;
the jacket (2) comprises a jacket body (21) in clearance fit with the torsion bar shaft (1) and adjusting bolts (22) arranged on the jacket body (21), the adjusting bolts (22) are arranged on the jacket body (21) in a threaded fit manner along the radial direction, the inner ends of the adjusting bolts are in contact with the torsion bar shaft (1), the number of the adjusting bolts (22) is at least two, the middle section of the torsion bar shaft (1) is clamped by the adjusting bolts (22), and the straightness and the clamping force of the middle section of the torsion bar shaft (1) are finely adjusted through the adjusting bolts (22), so that the straightness and the circular runout of the middle section of the torsion bar shaft (1) are not more than 0.04 mm;
the number of the adjusting bolts (22) is four, two adjusting bolts are arranged above the torsion bar shaft (1), the other two adjusting bolts are symmetrically arranged below the torsion bar shaft (1), the adjusting bolts (22) are close to the end part of the sleeve body (21), the pressure of each adjusting bolt (22) on the torsion bar shaft (1) is adjusted, so that the straightness of the middle section of the torsion bar shaft (1) is accurately adjusted, the straightness of the middle section of the torsion bar shaft (1) is enabled not to exceed 0.04mm, the clamping force borne by the middle section of the torsion bar shaft (1) is adjusted, and the circular runout of the middle section of the torsion bar shaft (1) is enabled not to exceed 0.04 mm.
2. The method for improving the spline accuracy of the torque rod shaft according to claim 1, wherein the second step is specifically:
the extension bar (11) is clamped by a chuck matched with the tip, the height of the extension bar (11) is finely adjusted by the chuck, the coaxiality of the extension bar (11) at the two ends of the torsion bar shaft is not more than 0.01mm, and the circular runout is not more than 0.02mm, so that the coaxiality of the two ends of the torsion bar shaft is not more than 0.01mm, the circular runout of the end part of the torsion bar shaft is not more than 0.02mm, and the chuck is loosened to clamp the extension bar (11) after the fine adjustment is completed.
3. The method for improving the spline accuracy of the torsion bar shaft according to the claim 1, characterized in that after the straightness of the torsion bar shaft (1) and the circular run-out of the middle section of the torsion bar shaft (1) are adjusted, the sleeve body (21) is clamped by a chuck on a double-head gear machine tool, the chuck is fixed with the support frame (3), the sleeve body (21) is driven by the chuck to rotate, and the outer wall of the sleeve body (21) is ground before use, so that the roundness and the straightness of the outer wall of the sleeve body (21) reach 0.02 mm.
4. The torsion bar shaft processed by the method for improving the spline accuracy of the torsion bar shaft according to any one of claims 1 to 3, wherein the height difference of the tooth tops of the splines at two ends of the torsion bar shaft (1) is not more than +/-0.2 mm, and the circumferential angle difference of the corresponding tooth tops of the splines at two ends of the torsion bar shaft (1) is not more than 0.2 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010559766.9A CN111673201B (en) | 2020-06-18 | 2020-06-18 | Method for improving accuracy of torsion bar shaft spline and product thereof |
Applications Claiming Priority (1)
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| JP2008036791A (en) * | 2006-08-08 | 2008-02-21 | Honda Motor Co Ltd | Gear cutting device |
| CN201684947U (en) * | 2010-03-15 | 2010-12-29 | 东莞东运机械制造有限公司 | Numerical-control gravure two-headed boring pipe bender |
| JP2011051084A (en) * | 2009-09-04 | 2011-03-17 | Kanzaki Kokyukoki Manufacturing Co Ltd | Gear cutting device |
| CN202461717U (en) * | 2011-12-29 | 2012-10-03 | 重庆机床(集团)有限责任公司 | Long spline shaft grinding fastener |
| CN104827056A (en) * | 2015-05-25 | 2015-08-12 | 黄小东 | Machining tool and method for slender shaft type parts |
| CN105619038A (en) * | 2014-11-26 | 2016-06-01 | 操纵技术Ip控股公司 | Design changes enabling the elimination of processes for a torsion bar |
| CN108673051A (en) * | 2018-05-23 | 2018-10-19 | 北京理工大学 | A kind of numerical control rolling lathe for the rolling of torsion shaft outer circle |
| CN209698208U (en) * | 2019-04-21 | 2019-11-29 | 重庆市金鹰工具厂 | A kind of spline miller bracket of adjustable-angle |
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| JP2008036791A (en) * | 2006-08-08 | 2008-02-21 | Honda Motor Co Ltd | Gear cutting device |
| JP2011051084A (en) * | 2009-09-04 | 2011-03-17 | Kanzaki Kokyukoki Manufacturing Co Ltd | Gear cutting device |
| CN201684947U (en) * | 2010-03-15 | 2010-12-29 | 东莞东运机械制造有限公司 | Numerical-control gravure two-headed boring pipe bender |
| CN202461717U (en) * | 2011-12-29 | 2012-10-03 | 重庆机床(集团)有限责任公司 | Long spline shaft grinding fastener |
| CN105619038A (en) * | 2014-11-26 | 2016-06-01 | 操纵技术Ip控股公司 | Design changes enabling the elimination of processes for a torsion bar |
| CN104827056A (en) * | 2015-05-25 | 2015-08-12 | 黄小东 | Machining tool and method for slender shaft type parts |
| CN108673051A (en) * | 2018-05-23 | 2018-10-19 | 北京理工大学 | A kind of numerical control rolling lathe for the rolling of torsion shaft outer circle |
| CN209698208U (en) * | 2019-04-21 | 2019-11-29 | 重庆市金鹰工具厂 | A kind of spline miller bracket of adjustable-angle |
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