CN111183717B

CN111183717B - Rolling tool for torsion shaft

Info

Publication number: CN111183717B
Application number: CN201218002608.XA
Authority: CN
Inventors: 李宏伟; 国旭华; 李红; 王洪臣; 王克伟; 王雪莲; 李春民
Original assignee: Beijing North Vehicle Group Corp
Current assignee: Beijing North Vehicle Group Corp
Priority date: 2012-07-18
Filing date: 2012-07-18
Publication date: 2014-10-22
Anticipated expiration: 2032-07-18

Abstract

The invention belongs to the field of processing of key parts of armored vehicles, and particularly discloses a rolling tool for a torsion shaft, which comprises a tool rest body and a rolling head, wherein the tool rest body is arranged on a guide rail of a machine tool; the rolling wheel is made of a hard alloy material body, and the unique characteristics of the rolling wheel provide good rigidity, strength and wear resistance for the tool; the rolling wheel adopts an arc profile design, and the geometric structure can ensure good bearing capacity of the rolling tool. The number of rolling heads is usually 3, the number of teeth of the torsion shaft can be 3-4 according to tooth root rolling, and the rolling heads are uniformly distributed in the circumferential direction. The fatigue life of the torsion shaft for the tool rolling processing can be prolonged by more than 4 times. The surface coating of the excircle rolling wheel is strengthened, and the service life of the rolling wheel can be further prolonged.

Description

Rolling tool for torsion shaft

Technical Field

The invention belongs to the field of processing of key parts of armored vehicles, and particularly relates to a rolling tool for strengthening a torsion shaft.

Background

Torsion shafts are important components of tracked vehicle mobility systems, and their performance directly affects vehicle trafficability. The processing process of the method has an indispensable important process of rolling, and the mechanism is that a rolling tool applies certain pressure to the surface of the torsion shaft and the tooth root of the spline to enable the rolling surface to generate plastic deformation, thereby achieving the purposes of improving the mechanical property of the surface of the torsion shaft and prolonging the service life. The deeper the rolled layer, the more obvious the strengthening effect. The traditional rolling processing is to obtain the depth of a rolling layer by adjusting the size of rolling pressure and evaluate the rolling effect.

This method has a problem that the rolling influence is sharply reduced or even stopped when the rolling depth increased along with the increase of the rolling force is increased to a certain value; meanwhile, the rigidity requirement of processing equipment is increased along with the increase of rolling pressure, the hydraulic sealing requirement is improved, and the service life of the rolling wheel is reduced, which is obviously not economical.

Disclosure of Invention

The invention aims to improve the rolling capability by improving a rolling tool rather than only rolling pressure, and obtain better plastic deformation effect; meanwhile, the problems of equipment deformation and equipment sealing failure caused by the traditional high rolling force can be avoided.

The technical scheme of the invention is as follows: the utility model provides a rolling tool for torsion shaft, includes that one portion installs the tool holder body 10 on machine tool guide rail 11 and the rolling head of fixed mounting on this tool holder body 10, its characterized in that: the rolling head comprises a rolling wheel 12, a rolling wheel shaft 14 and an oil cylinder; the oil cylinder comprises a cylinder cover 1, a cylinder barrel 6, a piston 7, a rear cover 9 and a return spring 5, wherein the piston 7 is installed in the cylinder barrel 6, the cylinder cover 1 is installed at the front end of the cylinder barrel 6, the rear cover 9 is installed at the rear end of the cylinder barrel 6, one end of the return spring 5 is fixedly connected with the bottom of the piston 7, and the other end of the return spring is fixedly connected with the rear cover 9; a cavity formed between the piston 7 and the rear cover 9 is connected with a hydraulic system; the inner hole of the rolling wheel 12 is provided with a roller pin 2 and then connected with a rolling wheel shaft 14, gaskets 15 are arranged on two axial sides of the rolling wheel 12, the rolling wheel shaft 14 is arranged at the front end of the piston 7, and a fixing screw 13 penetrates through the piston 7 and is connected with the gaskets 15; the screw plug 8 arranged on the back cover 9 is used for exhausting the gas of the hydraulic oil cylinder.

The rolling wheel is an excircle rolling wheel or a tooth root rolling wheel.

The number of the outer circle rolling wheels is 3, and the outer circle rolling wheels are uniformly distributed on the circumferential surface of the tool holder body 10 at an angle of 120 degrees; the number of the tooth root rolling wheels is 3 or 4 due to different spline tooth numbers of the torsion shaft, and the tooth root rolling wheels are uniformly distributed on the circumferential surface of the tool holder body 10 at 120 degrees or 90 degrees.

The rolling wheel is made of YG6 or YG8 hard alloy through sintering and grinding, and TiAlN coating is coated on the surface of the rolling wheel.

The rolling wheel is arc-shaped in profile.

Has the advantages that: compared with the traditional rolling tool, the rolling tool for the torsion shaft has the advantages that the rolling wheel is made of hard alloy, the hardness is high, the rigidity is good, the wear resistance is realized, the processing efficiency is improved, the rolling layer depth which cannot be realized in the past can be obtained, the fatigue life of the torsion shaft is vital to the improvement, and the fatigue life of the torsion shaft can be improved by more than 4 times; in addition, the hard alloy has higher brittleness, so that the profile of the rolling wheel is designed into a circular arc shape, the defect that the hard alloy is easy to break is overcome, and the reliability of the rolling wheel is improved; the TiAlN coating is coated on the surface of the rolling wheel, so that the service life of the rolling wheel can be further prolonged. Compared with the traditional rolling, the same effect can be obtained by using smaller rolling force, which is beneficial to reducing the load of equipment, maintaining the performance of the equipment and prolonging the service life of the equipment.

Drawings

The invention has 7 figures in total

Figure 1 is a schematic diagram of the construction of the twist-axle rolling tool of the present invention.

3 fig. 3 2 3 is 3 a 3 schematic 3 sectional 3 view 3 taken 3 along 3 line 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3

Fig. 3 is a schematic sectional view B-B of fig. 2.

FIG. 4 is a cross-sectional view of an outer cylindrical roller of the torsion shaft of the present invention.

Fig. 5 is a cross-sectional view of a torsion shaft root roller wheel according to the present invention.

FIG. 6 is a schematic view of the torque shaft rolling the outer circle of the present invention;

FIG. 7 is a schematic view of a twist-axle roll-on tooth root of the present invention;

Detailed Description

Embodiments of the twist-axle rolling tool of the present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 shows a schematic structural diagram of a torsion shaft rolling tool for rolling an outer circle of a torsion shaft, the rolling tool comprises a tool holder body 10 arranged on a machine tool guide rail 11 and a rolling head fixedly arranged on the tool holder body 10, and the torsion shaft rolling tool is characterized in that: the rolling head comprises rolling wheels 12, a rolling wheel shaft 14 and an oil cylinder.

The inner hole of the rolling wheel 12 is provided with a needle bearing 2 and then connected with a rolling wheel shaft 14, gaskets 15 are arranged on two axial sides, the rolling wheel shaft 14 is arranged at the front end of a piston 7, a fixing screw 13 penetrates through the piston 7 to be connected with the gaskets 15, and the needle bearing 2 is used for ensuring that the rolling wheel 12 is flexible in rotation, stable in operation and uniform in bearing; the oil cylinder comprises a cylinder cover 1, a cylinder 6, a piston 7, a rear cover 9, a return spring 5 and a spring fixing screw 3, wherein the piston 7 is arranged in the cylinder 6, the cylinder cover 1 is arranged at the front end of the cylinder 6, the rear cover 9 is arranged at the rear end of the cylinder 6, one end of the return spring 5 is connected with the bottom of the piston 7, and the other end of the return spring is fixedly connected with the rear cover 9; a cavity formed between the piston and the rear cover is connected with a hydraulic system; the screw plug 8 arranged at the bottom of the rear cover 9 is used for exhausting gas of the hydraulic oil cylinder; the arc groove at the front end of the piston 7 is connected with the rolling wheel shaft 14 in a matching way, and when the rolling wheel device works, pressure from a hydraulic system pushes the piston 7 to drive the rolling wheel shaft 14 and the rolling wheel 12 to move so as to apply force on the surface of the torsion shaft; in a non-working state, the return spring 5 and the spring fixing screw 3 return the piston 7. The cylinder cover 1 at the front part of the cylinder can limit the maximum stroke of the piston 7; the positioning key 4 is used for fixing the relative position of the cylinder barrel 6 and the tool rest body 10, the schematic diagram of fig. 1 shows the state of rolling the excircle, the number of rolling heads is 3, and the rolling heads are uniformly distributed on the circumferential surface at 120 degrees.

When the torque shaft tooth root is rolled instead, the cylinder 6 is simply rotated 90 ° about the cylinder axis while the outer circular rolling wheel 12a (see fig. 4) is replaced with the tooth root rolling wheel 12b (see fig. 5). The installation directions of the rolling wheels are divided into two types according to rolling outer circles or tooth roots, when the outer circles are rolled, rolling wheel shafts are parallel to the torsion shaft, and the rolling wheels rotate automatically and move axially along the torsion shaft at the same time as the rolling wheels rotate; when the tooth root is rolled, the rolling wheel shaft is vertical to the torsion shaft, as shown in figure 7, the rolling wheel rolls along the axial direction of the tooth root of the torsion shaft, the number of rolling heads is 3 or 4 due to different tooth numbers of the splines of the torsion shaft, and the rolling heads are uniformly distributed on the circumferential surface of the cutter frame body 10 at 120 degrees or 90 degrees.

The oil cylinder can provide stable roller pressure for the rolling wheel quantitatively. The contour of the rolling wheel is arc, and the top of the wheel rim is different because the surface to be processed is different from the excircle or the tooth root. FIG. 4 is an outer circle rolling wheel, which is made of YG6 or YG8 hard alloy through sintering and grinding, and better processing effect and service life can be obtained after the rolling wheel surface is coated with a TiAlN coating; FIG. 5 shows a tooth root rolling wheel, also made of YG6 or YG8 cemented carbide by sintering and grinding, the invention has arc profile design, which greatly improves the mechanical strength and service life of the rolling wheel; after the TiAlN coating is coated on the surface of the outer circular rolling wheel, longer processing service life can be obtained.

Claims

1. The utility model provides a rolling tool for torsion bar, includes that one portion installs tool holder body (10) on lathe guide rail (11) and the rolling head of fixed mounting on this tool holder body (10), its characterized in that: the rolling head comprises rolling wheels (12), rolling wheel shafts (14) and oil cylinders; the oil cylinder comprises a cylinder cover (1), a cylinder barrel (6), a piston (7), a rear cover (9) and a return spring (5), the piston (7) is installed in the cylinder barrel (6), the cylinder cover (1) is installed at the front end of the cylinder barrel (6), the rear cover (9) is installed at the rear end of the cylinder barrel (6), one end of the return spring (5) is fixedly connected with the bottom of the piston (7), and the other end of the return spring is fixedly connected with the rear cover (9); a cavity formed between the piston (7) and the rear cover (9) is connected with a hydraulic system; the inner hole of the rolling wheel (12) is provided with a needle bearing (2) and then connected with a rolling wheel shaft (14), gaskets (15) are arranged on two axial sides of the rolling wheel (12), the rolling wheel shaft (14) is arranged at the front end of the piston (7), and a fixing screw (13) penetrates through the piston (7) and is connected with the gaskets (15); a screw plug (8) arranged on the rear cover (9) is used for exhausting gas of the hydraulic oil cylinder; the rolling wheel is made of YG6 or YG8 hard alloy through sintering and grinding, and a TiAlN coating is coated on the surface of the rolling wheel; the rolling wheel is arc-shaped in profile.

2. The rolling tool for a torsion shaft according to claim 1, wherein: the rolling wheel is an excircle rolling wheel or a tooth root rolling wheel.

3. The rolling tool for a torsion shaft according to claim 2, wherein: the number of the outer circle rolling wheels is 3, and the outer circle rolling wheels are uniformly distributed on the circumferential surface of the tool rest body (10) at an angle of 120 degrees; the number of the tooth root rolling wheels is 3 or 4 due to different spline tooth numbers of the torsion shaft, and the tooth root rolling wheels are uniformly distributed on the circumferential surface of the cutter holder body (10) at 120 degrees or 90 degrees.