Torque control method for screwing bolts

A torque control and bolt technology, applied in the field of torque control screwing and screwing bolts, can solve the problems of wasting time, slow speed, low work efficiency, etc.

Active Publication Date: 2019-01-18
中铁建电气化局集团轨道交通器材有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, manual torsion is used on the industrial assembly line, which is slow, time-consuming, and inefficient. Therefore, a set of automatic bolt-tightening methods is needed, which can automatically identify the positions of threaded holes and bolt heads to control the sequence of bolt-tightening and improve work efficiency.

Method used

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  • Torque control method for screwing bolts
  • Torque control method for screwing bolts
  • Torque control method for screwing bolts

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Such as Figure 1-Figure 7 As shown, the torque control bolt tightening method provided in this embodiment includes a Cartesian coordinate bolt machine 4, a calibration plate 47 and a control system connected to the Cartesian coordinate bolt machine 4. The Cartesian coordinate bolt machine 4 is provided with three-axis linkage, and the three-axis linkage Including the X-axis 41, the Y-axis 42 arranged on the X-axis 41, the Z-axis 43 arranged on the Y-axis 42 and the C-axis 44 at one end of the Z-axis 43, including the following steps:

[0051] Step 1: Fix the workpiece 48 according to the calibration plate 47, such as Figure 5 with Image 6 As shown, the workpiece is fixed on the calibration plate at any angle and position;

[0052] Step 2: An industrial camera 45, a vision system connected to the industrial camera 45, a host system, and a drawing of the workpiece 48 imported into the host system are installed on the Cartesian coordinate bolt machine 4, and the workpie...

Embodiment 2

[0078] Such as Figure 1-Figure 4 with Figure 8 As shown, the torque control bolt tightening method provided in this embodiment includes a Cartesian coordinate bolt machine 4, a calibration plate 47 and a control system connected to the Cartesian coordinate bolt machine 4. The Cartesian coordinate bolt machine 4 is provided with three-axis linkage, and the three-axis linkage Including the X-axis 41, the Y-axis 42 arranged on the X-axis 41, the Z-axis 43 arranged on the Y-axis 42 and the C-axis 44 at one end of the Z-axis 43, including the following steps:

[0079] Step 1: fix the workpiece 48 according to the calibration plate 47;

[0080] Step 2: An industrial camera 45 and a vision system connected to the industrial camera 45 are installed on the rectangular coordinate bolt machine 4. The industrial camera 45 takes pictures of the workpiece 48 within the scope of the calibration plate 47 to generate an image, and the visual recognition is grouped into the vision system acc...

Embodiment 3

[0106] Such as Figure 1-Figure 4 with Figure 9 As shown, the torque control bolt tightening method provided in this embodiment includes a Cartesian coordinate bolt machine 4, a calibration plate 47 and a control system connected to the Cartesian coordinate bolt machine 4. The Cartesian coordinate bolt machine 4 is provided with three-axis linkage, and the three-axis linkage Including the X-axis 41, the Y-axis 42 arranged on the X-axis 41, the Z-axis 43 arranged on the Y-axis 42 and the C-axis 44 at one end of the Z-axis 43, including the following steps:

[0107] Step 1: fix the workpiece 48 according to the calibration plate 47;

[0108] Step 2: Carry out teaching identification grouping and group numbering for the specifications of the threads on all workpieces 48, the position coordinates of the threads, and the number of threads;

[0109] Step 3: The control system performs overall path planning for the threads of all groups: Manually operate the Cartesian bolt machine...

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Abstract

The invention discloses a torque control method for screwing bolts, and belongs to technical field of industrial assembly. A rectangular coordinate bolting machine, a calibration board and a connected control system are included. The method includes the following steps that a workpiece is fixed according to the a calibration board, groups are numbered, and a thread group includes a drawing recognition group, a teaching recognition group, a visual recognition group or a bolt head group, wherein each group is numbered; the control system makes an overall path plan for threads or bolt heads of all groups; the bolts are manually pre-screwed into thread holes in the workpiece; the rectangular coordinate bolting machine returns to zero; a sleeve is selected, and bolt screwing is conducted on the thread group or the bolt head group sequentially according to the crossing order. Through the drawing recognition group, the teaching recognition group, the visual recognition group and the bolt head group, the threads or the bolt heads are numbered, a bolt screwing path is planned through the control system, and the purpose of quickly screwing the bolts is achieved.

Description

technical field [0001] The invention relates to a bolt-tightening method, in particular to a torque-controlled bolt-tightening method, which belongs to the technical field of industrial assembly. Background technique [0002] There are two methods to control the pre-tightening force of bolts: tension control method and torque control method. The tension control method is to use a hydraulic tensioner to stretch the bolt to a certain length and then tighten the nut easily. At this time, the elastic deformation of the bolt occurs. The pretightening force, while the torque control method is to use the tightening machine, electric torque wrench, pneumatic torque wrench, hydraulic torque wrench, manual torque wrench to control the pretightening force of the bolt. [0003] However, manual torsion is used on the industrial assembly line, which is slow, time-consuming, and inefficient. Therefore, a set of automatic bolt-tightening methods is needed, which can automatically identify t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P19/06
CPCB23P19/06
Inventor 刘海斌包剑波庄源昌陈家龙冒益海
Owner 中铁建电气化局集团轨道交通器材有限公司
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