CN114682814A - Drilling process for steering column input shaft - Google Patents

Drilling process for steering column input shaft Download PDF

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Publication number
CN114682814A
CN114682814A CN202011591820.4A CN202011591820A CN114682814A CN 114682814 A CN114682814 A CN 114682814A CN 202011591820 A CN202011591820 A CN 202011591820A CN 114682814 A CN114682814 A CN 114682814A
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CN
China
Prior art keywords
input shaft
feeding
away
starting point
cutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011591820.4A
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Chinese (zh)
Inventor
李凡
甘元泉
姚秀涛
黄伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Huayu Steering Systems Co Ltd
Original Assignee
Bosch Huayu Steering Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bosch Huayu Steering Systems Co Ltd filed Critical Bosch Huayu Steering Systems Co Ltd
Priority to CN202011591820.4A priority Critical patent/CN114682814A/en
Publication of CN114682814A publication Critical patent/CN114682814A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/009—Stepped drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/28—Details of hard metal, i.e. cemented carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/20—Number of cutting edges

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)

Abstract

The invention relates to the technical field of steering system preparation, in particular to a drilling process for an input shaft of a steering column, which comprises the following steps: centering, first feeding, first retracting, second feeding, second retracting, third feeding and third retracting. Compared with the prior art, the invention designs the process route of feeding and retracting for three times, and is matched with the selection of the drilling tool, the feeding speed, the rotating speed of the main shaft and the setting of the lubricating quantity, thereby solving the quality problem of the inner wall of the hole and the clearing problem of scrap iron in the drilling process, improving the drilling quality, improving the qualified rate of drilling and pinning, accelerating the production beat, improving the production efficiency, having clear logic and high stability.

Description

Drilling process for steering column input shaft
Technical Field
The invention relates to the technical field of steering system preparation, in particular to a drilling process for an input shaft of a steering column.
Background
When a steering column of an automobile steering system is assembled, an input shaft and a torsion bar need to be drilled and pinned, and the input shaft and the torsion bar are fixed.
At present, in the existing drilling process, the drilling quality is relatively poor, and the qualification rate of the press pin of the next procedure is directly influenced; in the drilling process, the generated scrap iron cannot be timely cut off, so that the drill bit is wound by longer processing scrap iron, and the workpiece is scratched.
The quality of the drilling process directly determines the qualified rate of the pin punching, and how to ensure the stability of the drilling process quality because the input shaft and the torsion bar have different strength and hardness, so that the quality of the product after press mounting is ensured, the unqualified rate of the pin punching is reduced, the number of times of pin punching is reduced to accelerate the production beat, and the improvement of the production efficiency is the key of the current drilling and pin punching process.
Therefore, a drilling process for the steering column input shaft needs to be designed to improve the drilling quality and the drilling and pinning yield.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a drilling process for an input shaft of a steering column, so as to improve the drilling quality and improve the qualified rate of drilling and pinning.
In order to achieve the above object, the present invention is a drilling process for a steering column input shaft, comprising the steps of: step 1, centering: the drill bit of the cutter is fed to the position 1mm away from the starting point on the input shaft side at the centering feed speed of 2mm/s from the starting point on the outer side of the input shaft side, and the drill bit of the cutter stays at the position on the input shaft side.
Step 2, feeding for the first time: the cutter is fed from the position 1mm away from the starting point on one side of the input shaft to the position 6mm away from the starting point in the torsion bar at the feed speed of 8mm/s, and the drill of the cutter is stopped at the position of the torsion bar.
Step 3, retracting the cutter for the first time: the torque rod is fed from the position 6mm away from the starting point to the position 1mm away from the starting point on the input shaft side at the tool withdrawal feed speed of 8mm/s, and the drill of the tool stays at the position on the input shaft side.
Step 4, feeding for the second time: the cutter is fed from the position 1mm away from the starting point on one side of the input shaft at the feed speed of 8mm/s to the position 14mm away from the starting point on the other side of the input shaft, and the drill of the cutter is stopped at the position on the other side of the input shaft.
Step 5, retracting the cutter for the second time: the position 14mm away from the starting point on the other side of the input shaft is fed to the position 7mm away from the starting point in the torsion bar at the tool withdrawal feed speed of 8mm/s, and the drill bit of the tool stays at the position of the torsion bar.
Step 6, feeding for the third time: feeding the workpiece from the position 7mm away from the starting point in the torsion bar to the position 18mm away from the starting point on the other side of the input shaft at the feed speed of 8mm/s, and stopping the drill bit of the cutter outside the workpiece.
Step 7, retracting the cutter for the third time: feeding the workpiece to the position 18mm away from the starting point on one side of the input shaft at the tool withdrawal feeding speed of 10mm/s, and stopping the drill bit of the tool outside the workpiece.
The cutter is a hard alloy step drill.
The hard alloy stepped drill is of a two-edge type.
The surface of the hard alloy stepped drill is provided with a Cr series composite multilayer coating, so that the hardness of the drill bit is improved.
The centering depth is 1 mm.
The cutter is fixed on the main shaft.
The rotating speed of the main shaft is 3550 r/min.
The spindle is provided with a lubricating amount, the lubricating amount is controlled by a pressure valve, and the pressure of the pressure valve is 2.4 bar.
Compared with the prior art, the invention designs the process route of feeding and retracting for three times, and is matched with the selection of the drilling tool, the feeding speed, the rotating speed of the main shaft and the setting of the lubricating quantity, thereby solving the quality problem of the inner wall of the hole and the clearing problem of scrap iron in the drilling process, improving the drilling quality, improving the qualified rate of drilling and pinning, accelerating the production beat, improving the production efficiency, having clear logic and high stability.
Drawings
FIG. 1 is a schematic view of the drilling process of the present invention.
Fig. 2 is a schematic view of a drilling tool used in the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1, the present invention is a drilling process for a steering column input shaft, comprising the steps of:
step 1, centering: the drill bit of the cutter is fed to the position 1mm away from the starting point on the side of the input shaft 1 from the outside of the position 1mm away from the starting point at the centering feed speed of 2mm/s, and the drill bit of the cutter is stopped at the position on the side of the input shaft.
Step 2, feeding for the first time: the cutter is fed from the position 1mm away from the starting point on one side of the input shaft 1 to the position 6mm away from the starting point in the torsion bar 2 at the feed speed of 8mm/s, and the drill of the cutter is stopped at the position of the torsion bar.
Step 3, retracting the cutter for the first time: the workpiece is fed from the position 6mm away from the starting point inside the torsion bar 2 to the position 1mm away from the starting point on the side of the input shaft 1 at the tool withdrawal feed speed of 8mm/s, and the drill of the tool is stopped at the position on the side of the input shaft.
Step 4, feeding for the second time: the cutter is fed from the position 1mm away from the starting point on one side of the input shaft 1 to the position 14mm away from the starting point on the other side of the input shaft 1 at the feed speed of 8mm/s, and the drill of the cutter is stopped at the position on the other side of the input shaft.
Step 5, retracting the cutter for the second time: the position 14mm away from the starting point on the other side of the input shaft 1 is fed to the position 7mm away from the starting point in the torsion bar 2 at the tool withdrawal feed speed of 8mm/s, and the drill bit of the tool stays at the position of the torsion bar.
Step 6, feeding for the third time: and feeding the workpiece to the position 18mm away from the starting point on the other side of the input shaft 1 from the position 7mm away from the starting point in the torsion bar 2 at the feed speed of 8mm/s, and stopping the drill bit of the cutter outside the workpiece.
Step 7, retracting the cutter for the third time: feeding the workpiece to the position 18mm away from the starting point on one side of the input shaft 1 at the tool withdrawal feeding speed of 10mm/s, and stopping the drill bit of the tool outside the workpiece.
Two tool retracting actions are arranged at the matching position of the torsion bar 2 and the input shaft 1 and used for ensuring the drilling quality of the matching position of the input shaft 1 and the torsion bar 2.
The feeding speed is reduced on the basis of theoretical calculation according to the rotating speed of the main shaft so as to ensure the drilling quality and the service life of the lifting drill bit,
referring to fig. 2, in the present invention, the tool is a cemented carbide stepped drill, the cemented carbide stepped drill is of a two-blade type, and the surface of the cemented carbide stepped drill is provided with a Cr-based composite multilayer coating, which improves the hardness of the drill bit to ensure the drilling quality.
In the present invention, the centering depth is 1 mm.
In the invention, the cutter is fixed on the main shaft. The rotating speed of the main shaft is 3550 r/min. The spindle speed mainly affects the drilling quality and indirectly determines the feed speed. The main shaft is provided with a lubricating amount, the lubricating amount is controlled by a pressure valve, and the pressure of the pressure valve is 2.4 bar. The pressure of the pressure valve determines the amount of lubricating oil, and the small amount of lubricating oil can cause the problems of overlarge drilling resistance, overhigh temperature in the machining process and the like, thereby influencing the drilling quality and the service life of a drill bit; a large amount of iron filings will adsorb the surface of the workpiece.
The invention designs a process route of feeding and retracting for three times, and is matched with the selection of a drilling tool, the feeding speed, the rotating speed of the main shaft and the setting of the lubricating quantity, thereby solving the quality problem of the inner wall of the hole and the clearing problem of scrap iron in the drilling process, improving the drilling quality, improving the qualification rate of drilling and pinning, accelerating the production beat, improving the production efficiency, having clear logic and high stability.

Claims (8)

1. A drilling process for an input shaft of a steering column, characterized by: the method comprises the following steps: step 1, centering: the drill bit of the cutter is fed to the position, which is 1mm away from the starting point, on one side of the input shaft (1) from the outside of the position, which is-1 mm away from the starting point, of one side of the input shaft (1) at the centering feed speed of 2mm/s, and the drill bit of the cutter stays at the position on one side of the input shaft; step 2, feeding for the first time: feeding the workpiece from the position 1mm away from the starting point on one side of the input shaft (1) to the position 6mm away from the starting point in the torsion bar (2) at the feed rate of 8mm/s, and stopping a drill bit of the cutter at the position of the torsion bar; step 3, retracting the cutter for the first time: feeding the workpiece from the position 6mm away from the starting point in the torsion bar (2) to the position 1mm away from the starting point on one side of the input shaft (1) at the tool withdrawal feed speed of 8mm/s, and stopping a drill bit of the tool at the position on one side of the input shaft; step 4, feeding for the second time: feeding the workpiece from the position 1mm away from the starting point on one side of the input shaft (1) to the position 14mm away from the starting point on the other side of the input shaft (1) at the feed speed of 8mm/s, and stopping the drill bit of the cutter at the position on the other side of the input shaft; step 5, retracting the cutter for the second time: feeding the material from the position 14mm away from the starting point on the other side of the input shaft (1) to the position 7mm away from the starting point in the torsion bar (2) at the tool withdrawal feed speed of 8mm/s, and stopping a drill bit of the tool at the position of the torsion bar; step 6, feeding for the third time: feeding the workpiece from the position 7mm away from the starting point inside the torsion bar (2) to the position 18mm away from the starting point outside the other side of the input shaft (1) at the feed speed of 8mm/s, and stopping a drill bit of the cutter outside the workpiece; step 7, retracting the cutter for the third time: feeding the workpiece to the position 18mm away from the starting point on one side of the input shaft (1) at the tool withdrawal feeding speed of 10mm/s, and stopping the drill bit of the tool outside the workpiece.
2. A drilling process for a steering column input shaft according to claim 1, wherein: the cutter is a hard alloy step drill.
3. A drilling process for a steering column input shaft according to claim 2, wherein: the hard alloy stepped drill is of a two-edge type.
4. A drilling process for a steering column input shaft according to claim 2, wherein: the surface of the hard alloy stepped drill is provided with a Cr series composite multilayer coating, so that the hardness of the drill bit is improved.
5. A drilling process for a steering column input shaft according to claim 2, wherein: the centering depth is 1 mm.
6. A drilling process for a steering column input shaft according to claim 1, wherein: the cutter is fixed on the main shaft.
7. A drilling process for a steering column input shaft according to claim 6, wherein: the rotating speed of the main shaft is 3550 r/min.
8. A drilling process for a steering column input shaft according to claim 6, wherein: the spindle is provided with a lubricating amount, the lubricating amount is controlled by a pressure valve, and the pressure of the pressure valve is 2.4 bar.
CN202011591820.4A 2020-12-29 2020-12-29 Drilling process for steering column input shaft Pending CN114682814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011591820.4A CN114682814A (en) 2020-12-29 2020-12-29 Drilling process for steering column input shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011591820.4A CN114682814A (en) 2020-12-29 2020-12-29 Drilling process for steering column input shaft

Publications (1)

Publication Number Publication Date
CN114682814A true CN114682814A (en) 2022-07-01

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CN202011591820.4A Pending CN114682814A (en) 2020-12-29 2020-12-29 Drilling process for steering column input shaft

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56102407A (en) * 1980-01-14 1981-08-15 Nippon Denso Co Ltd Drilling method and apparatus
JP2002120196A (en) * 2000-10-11 2002-04-23 Matsushita Electric Ind Co Ltd Boring method to laminated board
TWI273937B (en) * 2005-12-21 2007-02-21 Hsin-Tien Chang Guide-post drill bit
CN102026756A (en) * 2008-05-16 2011-04-20 钴领无限公司 Multi-blade solid carbide drill
CN104874826A (en) * 2015-05-04 2015-09-02 深圳崇达多层线路板有限公司 Drilling method of thick copper circuit board
CN105772796A (en) * 2016-03-31 2016-07-20 东莞市连威电子有限公司 Micro-diameter through hole machining technology
CN108601226A (en) * 2018-04-25 2018-09-28 星河电路（福建）有限公司 A kind of superelevation radius-thickness ratio micropore chisels brill processing method
CN111515433A (en) * 2020-05-11 2020-08-11 山西平阳重工机械有限责任公司 Method for machining deep hole on stainless steel part by numerical control deep hole drilling machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56102407A (en) * 1980-01-14 1981-08-15 Nippon Denso Co Ltd Drilling method and apparatus
JP2002120196A (en) * 2000-10-11 2002-04-23 Matsushita Electric Ind Co Ltd Boring method to laminated board
TWI273937B (en) * 2005-12-21 2007-02-21 Hsin-Tien Chang Guide-post drill bit
CN102026756A (en) * 2008-05-16 2011-04-20 钴领无限公司 Multi-blade solid carbide drill
CN104874826A (en) * 2015-05-04 2015-09-02 深圳崇达多层线路板有限公司 Drilling method of thick copper circuit board
CN105772796A (en) * 2016-03-31 2016-07-20 东莞市连威电子有限公司 Micro-diameter through hole machining technology
CN108601226A (en) * 2018-04-25 2018-09-28 星河电路（福建）有限公司 A kind of superelevation radius-thickness ratio micropore chisels brill processing method
CN111515433A (en) * 2020-05-11 2020-08-11 山西平阳重工机械有限责任公司 Method for machining deep hole on stainless steel part by numerical control deep hole drilling machine

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