阅读说明：本技术 一种高强钢细长扭杆弹簧自动化车削工艺方法 (Automatic turning process method for high-strength steel slender torsion bar spring ) 是由 刘心藜 王会龙 王洪臣 王雪莲 武伟 王芳 冯卫 张晶晶 刘珍妮 郭晓龙 赵宇翔 于 2020-12-22 设计创作，主要内容包括：本发明提出一种高强钢细长扭杆弹簧自动化车削工艺方法,包括设备布置及安装、上料和自动化加工步骤。本方法能够解决45CrNiMoVA高强钢材料细长扭杆弹簧(直径35～Φ50mm,长度1500～2500mm)自动化车削加工技术难题,解决自动化车削加工中存在的装夹易产生变形、特殊材料不易断屑、尺寸精度和粗糙度难以保证等技术难题,可实现自动化批量生产,生产效率高、工艺稳定可靠,加工精度可以达到0.15mm以内,生产效率不低于34min/根。(The invention provides an automatic turning process method for a high-strength steel slender torsion bar spring, which comprises the steps of equipment arrangement and installation, feeding and automatic processing. The method can solve the technical problems of automatic turning of the slender torsion bar spring (with the diameter of 35-phi 50mm and the length of 1500-2500 mm) made of 45CrNiMoVA high-strength steel material, the technical problems of easy deformation of clamping, difficult chip breaking of special materials, difficult guarantee of dimensional accuracy and roughness and the like in automatic turning, can realize automatic batch production, and has the advantages of high production efficiency, stable and reliable process, processing accuracy within 0.15mm and production efficiency not lower than 34 min/spring.)

1. The automatic turning process method for the high-strength steel slender torsion bar spring is characterized by comprising the following steps of:

s1, equipment arrangement and installation

The numerical control machine tool is transversely placed, a bracket vehicle and a torsion bar spring bracket are placed on the side of the machine tool, a laser marking machine is installed on the side of the bracket, and a truss robot is arranged above the laser marking machine and covers the whole working area;

s2, feeding

Manually placing the torsion bar spring on a torsion bar spring bracket of the bracket vehicle; moving the bracket vehicle and the torsion bar spring bracket to the equal-pitch material channel, wherein an opening is formed in the side surface of the material channel and used for pushing the bracket vehicle into a material to be loaded, and lifting supports are arranged on two sides of the opening and used for lifting the bracket and the torsion bar spring on the bracket vehicle; after the bracket vehicle is moved away, the bracket is placed on the material channel; the material channel moves to a loading position, the truss manipulator moves downwards to grab the torsion bar spring and the torsion bar spring, the machine tool protection is opened, the manipulator clamps the torsion bar spring, the torsion bar spring is placed on the hydraulic self-centering support frame, and the torsion bar spring blank loading is completed;

s3, automatic processing

The mechanical arm moves upwards, the machine tool is closed for protection, a hydraulic clamping jaw in the machine tool is used for clamping the left end spline excircle of the torsion bar spring, a right end center hole is automatically pushed tightly by a right side center point, a measuring head automatically measures the right end face, a right frame nest is turned according to the position of the right end face, and a hydraulic self-centering support frame is automatically clamped through hydraulic pressure of an oil cylinder; spraying high-pressure cutting fluid from the front tool face of the turning tool by adopting strong high-pressure internal cooling cutting fluid jet flow, turning the outer circle and chamfer of the right end of the torsion bar spring, turning the right arc face, and turning the outer circle of the rod part to half length; clearing the cooling liquid to finish one-side processing;

secondly, opening the machine tool protection, and moving the manipulator downwards to grab the torsion bar spring; the machine tool chuck and the tailstock are loosened, the mechanical arm clamping torsion bar spring is firstly translated and then lifted and moves outside the protection, the mechanical arm rotates to turn around the torsion bar spring, the clamping torsion bar spring moves downwards, the torsion bar spring is placed on the hydraulic self-centering support frame, the mechanical arm moves outside the protection, and the machine tool protection is closed; clamping the right end of the torsion bar spring by the chuck, tightly pushing the left end, automatically measuring the left end surface by the measuring head, turning a left frame nest according to the position of the left end surface, automatically clamping the support frame, jetting strong high-pressure internal-cooling cutting fluid to spray high-pressure cutting fluid from the front cutter surface of the turning tool, turning the excircle and chamfer of the left end of the torsion bar spring, turning the left arc surface, turning the other half length of the excircle of the rod part, and cleaning cooling fluid;

detecting and marking: and (3) online detection, detecting the machining size precision and storing data, opening the machine tool protection, sending the machined torsion bar spring to a storage bin by a mechanical arm, and automatically marking by a laser marking machine to complete the working cycle.

2. The automated turning process of claim 1, wherein the torsion bar spring material is 45CrNiMoVA high strength steel.

3. The automatic turning process method of claim 1, wherein the length of the torsion bar spring ranges from 1800 mm to 2500mm, and the diameter of the rod portion ranges from 35 mm to 50 mm.

4. The automated turning process of claim 1, wherein the torsion bar spring carriage of the mobile carriage cart is provided with V-shaped positioning elements.

5. The automated turning process of claim 1, wherein the hydraulic self-centering support bracket is of an open-top configuration.

6. The automated turning process of claim 1, wherein in step S3, the support is arranged at an angle of 30 ° with respect to vertical, the turning tool is mounted at an angle of 15 ° with respect to the vertical plane, and the turning tool relief angle is 25 °.

Technical Field

The invention belongs to the technical field of high-strength steel torsion bar spring processing, and particularly relates to an automatic turning process method for a high-strength steel slender torsion bar spring.

Background

The high-strength steel slender torsion bar spring is a key workpiece and is widely applied to the fields of thin-shell vehicles and civil special vehicles. The high-strength steel slender torsion bar spring has the characteristics of slender structure, difficult cutting of materials and the like, the conditions of easy clamping deformation, difficult chip breaking of materials, and difficulty in guaranteeing the roughness and the dimensional accuracy exist in automatic turning, and the automatic processing cannot be realized, so that the technical problem in the industry is always solved.

Disclosure of Invention

Technical problem to be solved

The invention provides an automatic turning process method for a high-strength steel slender torsion bar spring, which aims to solve the technical problems that clamping deformation is easy, materials are not easy to break, and roughness and dimensional accuracy are difficult to guarantee, and automatic machining cannot be realized.

(II) technical scheme

In order to solve the technical problem, the invention provides an automatic turning process method for a high-strength steel slender torsion bar spring, which comprises the following steps:

s1, equipment arrangement and installation

The numerical control machine tool is transversely placed, a bracket vehicle and a torsion bar spring bracket are placed on the side of the machine tool, a laser marking machine is installed on the side of the bracket, and a truss robot is arranged above the laser marking machine and covers the whole working area;

s2, feeding

Manually placing the torsion bar spring on a torsion bar spring bracket of the bracket vehicle; moving the bracket vehicle and the torsion bar spring bracket to the equal-pitch material channel, wherein an opening is formed in the side surface of the material channel and used for pushing the bracket vehicle into a material to be loaded, and lifting supports are arranged on two sides of the opening and used for lifting the bracket and the torsion bar spring on the bracket vehicle; after the bracket vehicle is moved away, the bracket is placed on the material channel; the material channel moves to a loading position, the truss manipulator moves downwards to grab the torsion bar spring and the torsion bar spring, the machine tool protection is opened, the manipulator clamps the torsion bar spring, the torsion bar spring is placed on the hydraulic self-centering support frame, and the torsion bar spring blank loading is completed;

s3, automatic processing

The mechanical arm moves upwards, the machine tool is closed for protection, a hydraulic clamping jaw in the machine tool is used for clamping the left end spline excircle of the torsion bar spring, a right end center hole is automatically pushed tightly by a right side center point, a measuring head automatically measures the right end face, a right frame nest is turned according to the position of the right end face, and a hydraulic self-centering support frame is automatically clamped through hydraulic pressure of an oil cylinder; spraying high-pressure cutting fluid from the front tool face of the turning tool by adopting strong high-pressure internal cooling cutting fluid jet flow, turning the outer circle and chamfer of the right end of the torsion bar spring, turning the right arc face, and turning the outer circle of the rod part to half length; clearing the cooling liquid to finish one-side processing;

secondly, opening the machine tool protection, and moving the manipulator downwards to grab the torsion bar spring; the machine tool chuck and the tailstock are loosened, the mechanical arm clamping torsion bar spring is firstly translated and then lifted and moves outside the protection, the mechanical arm rotates to turn around the torsion bar spring, the clamping torsion bar spring moves downwards, the torsion bar spring is placed on the hydraulic self-centering support frame, the mechanical arm moves outside the protection, and the machine tool protection is closed; clamping the right end of the torsion bar spring by the chuck, tightly pushing the left end, automatically measuring the left end surface by the measuring head, turning a left frame nest according to the position of the left end surface, automatically clamping the support frame, jetting strong high-pressure internal-cooling cutting fluid to spray high-pressure cutting fluid from the front cutter surface of the turning tool, turning the excircle and chamfer of the left end of the torsion bar spring, turning the left arc surface, turning the other half length of the excircle of the rod part, and cleaning cooling fluid;

detecting and marking: and (3) online detection, detecting the machining size precision and storing data, opening the machine tool protection, sending the machined torsion bar spring to a storage bin by a mechanical arm, and automatically marking by a laser marking machine to complete the working cycle.

Further, the torsion bar spring material is 45CrNiMoVA high-strength steel.

Furthermore, the length range of the torsion bar spring is 1800-2500 mm, and the diameter of the rod part is 35-50 mm.

Further, a V-shaped positioning element is arranged on a torsion bar spring bracket of the mobile bracket vehicle.

Furthermore, the hydraulic self-centering support frame adopts an opening upward structure.

Further, in step S3, the supporting frame is arranged at an angle of 30 ° with respect to the vertical direction, the turning tool is mounted at an angle of 15 ° with respect to the vertical plane, and the turning tool relief angle is 25 °.

(III) advantageous effects

The invention provides an automatic turning process method for a high-strength steel slender torsion bar spring, which comprises the steps of equipment arrangement and installation, feeding and automatic processing. The method can solve the technical problems of automatic turning of the slender torsion bar spring (with the diameter of 35-phi 50mm and the length of 1500-2500 mm) made of 45CrNiMoVA high-strength steel material, the technical problems of easy deformation of clamping, difficult chip breaking of special materials, difficult guarantee of dimensional accuracy and roughness and the like in automatic turning, can realize automatic batch production, and has the advantages of high production efficiency, stable and reliable process, processing accuracy within 0.15mm and production efficiency not lower than 34 min/spring.

Drawings

FIG. 1 is a schematic structural view of a torsion bar spring according to the present invention;

fig. 2 is a schematic view illustrating an automatic clamping of the torsion bar spring in the automatic turning process of the embodiment.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.

The embodiment provides an automatic turning process method for a high-strength steel slender torsion bar spring, the torsion bar spring material is 45CrNiMoVA high-strength steel, as shown in FIG. 1, the length range of the slender torsion bar spring is 1800-2500 mm, and the diameter of a rod part is 35-50 mm.

The automatic turning process method of the high-strength steel slender torsion bar spring comprises the following steps:

s1, equipment arrangement and installation

The full skill digit control machine tool is transversely placed, and bracket car and work piece bracket are placed to the lathe left side, and the laser marking machine of bracket left side installation, truss robot arrange in laser marking machine top, cover whole work area.

S2, feeding

The torsion bar springs are manually placed on a workpiece bracket, the workpiece bracket is used for storing 12 torsion bar springs, V-shaped positioning elements are arranged on the workpiece bracket, and the intervals of the torsion bar springs are equal after the torsion bar springs are placed. Moving the bracket vehicle and the workpiece bracket to the equal-pitch material channel, wherein an opening is formed in the side surface of the material channel and used for pushing the bracket vehicle into a material to be loaded, and lifting supports are arranged on two sides of the opening and can lift the bracket and the workpiece on the bracket vehicle; after the carrier vehicle is removed, the carrier is placed on the material channel. The material channel moves to a loading position, the truss manipulator moves downwards to grab the torsion bar spring workpiece, the manipulator moves upwards and rightwards to the position above the machine tool, the machine tool is opened for protection, the manipulator clamps the torsion bar spring to move downwards, the torsion bar spring is placed on a hydraulic self-centering support frame adopting an upward opening structure, and the torsion bar spring blank loading is completed.

S3, automatic processing

Moving a manipulator upwards, closing machine tool protection, clamping an excircle of a left end spline of a torsion bar spring by adopting a hydraulic clamping jaw in the machine tool, automatically jacking a right end center hole by a right side tip, automatically measuring a right end surface by a measuring head, turning a right frame nest according to the position of the right end surface, and hydraulically and automatically clamping a hydraulic self-centering support frame by an oil cylinder, wherein as shown in figure 2, the support frame 1 is arranged at an angle of 30 degrees relative to the vertical direction, a turning tool 2 is installed at an angle of 15 degrees with the vertical plane, and the turning tool relief angle is 25; and (3) jetting high-pressure internal cooling cutting fluid by adopting strong high-pressure internal cooling cutting fluid to spray the high-pressure cutting fluid from the front tool face of the turning tool, turning the outer circle of the right end of the torsion bar spring and a 30-degree chamfer, turning the right side arc face, turning the outer circle of the rod part to half length, and cleaning the cooling fluid to finish one-side machining.

And secondly, opening the machine tool protection, and moving the manipulator downwards to grab the workpiece. The machine tool chuck and the tailstock are loosened, a mechanical arm clamping workpiece is firstly translated and then lifted, the mechanical arm moves outside the protection, the torsion bar spring is turned around by the rotation of the mechanical arm, the clamping torsion bar spring moves downwards, the workpiece is placed on the hydraulic self-centering support frame, the mechanical arm moves upwards to the outside of the protection, and the machine tool protection is closed. Chuck centre gripping right-hand member, the tight left end in top, gauge head automatic measure left end face according to left end face position turning left side frame nest, support frame self-holding, strong high pressure interior cold cutting fluid efflux is from the lathe tool rake face blowout high pressure cutting fluid, turning torsion bar spring left end excircle and 30 chamfers, turning left side arc surface, the other half length of turning pole portion excircle, clear coolant liquid.

Detecting and marking: and (3) online detection, detecting the machining size precision and storing data, opening the machine tool protection, conveying the machined workpiece to a storage bin by a mechanical arm, and automatically marking by a laser marking machine to complete the working cycle.

In the automatic processing process, aiming at the problem of winding of long iron chips generated during turning of 45CrNiMoVA high-strength steel materials, high-pressure cutting fluid is sprayed out from the front tool face of a turning tool by adopting strong high-pressure internal cooling cutting fluid jet flow, the working pressure of a high-pressure pump is designed to be 100bar, and chip breaking is realized by reducing the cutting curling radius, increasing the bending moment and bending strain.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.