A method for measuring the axial force distribution of unidirectional composite material drilling
A composite material, axial force technology, applied to the positioning measurement in the boring machine/drilling machine, components of the boring machine/drilling machine, force/torque/work measuring instrument, etc., can solve the complex calculation process, damage the drilling chip removal and heat dissipation Semi-closed environment, difficult to obtain accurate results and other problems, to achieve the effect of simple and easy operation and ensuring stability
Active Publication Date: 2021-11-05
DALIAN UNIV OF TECH
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Problems solved by technology
However, the theoretical derivation and calculation process of the existing research is complicated, and the half-hole drilling experiment is cumbersome and destroys the semi-enclosed environment of drilling chip removal and heat dissipation, making it difficult to obtain accurate results.
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[0019] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and technical solutions. The material selected in this example is a unidirectional T800 grade carbon fiber reinforced composite material plate with a thickness of 4mm and cut into a 24mm×24mm test piece. The cutting tool used in the experiment is a twist drill with a diameter of 6mm and a small top angle. The device platform used in the experiment is a general-purpose Drilling axial force test platform, the processing parameters are 3000r / min, the feed speed is 90mm / min, in order to confirm the validity of the method, two groups of different fiber arrangements are tested, and the specific steps of the measurement experiment are as follows:
[0020] 1) Do not process the sample, carry out normal drilling and hole making and measure the axial force of the tool, and extract the change curve of the axial force with time in the stable stage of h...
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The invention discloses a method for measuring the axial force distribution of unidirectional composite material drilling, which belongs to the technical field of fiber reinforced composite material processing, and relates to a method for measuring the distribution of fiber reinforced composite material drilling axial force along with the fiber cutting angle. In this method, the composite material sample is firstly cut to form a groove structure on its surface. Hole-making processing is carried out on the existing drilling force-measuring experimental platform, and the through-holes made must intersect with the sample cutting grooves. Extract the axial force curve in the drilling stage, compare it with the normal axial force curve to find its mutation point, and judge the mutation point, which is the fiber cutting angle at the position of the groove. Calculate the axial force fluctuation cycle according to the processing parameters, and calculate the distribution of axial force with fiber cutting angle in all cycles. The measurement method does not change the drilling processing state, does not need to build a new measurement test platform, the experiment operation is simple and convenient, and the distribution law is determined by reading the sudden change of the axial force, and the measurement result is accurate and reliable.
Description
technical field [0001] The invention belongs to the technical field of fiber-reinforced composite material processing, and relates to a method for measuring the axial force distribution of unidirectional composite material drilling. Background technique [0002] Fiber-reinforced composite materials have the characteristics of light weight, high strength and other excellent mechanical properties, and have been widely used in aerospace and other fields. In order to meet the needs of parts assembly and connection during production and manufacturing, a large number of connection holes must be prepared, and the quality of the holes directly determines Connectivity of components. Twist drill tools are widely used in actual production, because of their excellent chip removal ability and high hole-making efficiency, they show better processing performance in fiber composite material hole making. However, the interlayer bonding strength of composite materials is low, and damages suc...
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IPC IPC(8): G06F30/20G06F119/14
CPCB23B2270/483B23B35/00B23B2226/275G01L5/12B23B49/00
Inventor 王福吉郝佳轩白玉刘巍马建伟
Owner DALIAN UNIV OF TECH