With the passage of time, the progress of The Times is more than a little, now the society's products, whether flying in the sky, running on the ground, medical devices, and usually used electronic products, are inseparable from custom processing to create. At present, the use of precision hardware parts processing can be said to be very extensive, precision processing is in the original traditional processing, the process optimization and improvement, more in line with the current era of precision products. The improvement of processing conditions of precision hardware parts not only meets the demand of the market, but also strengthens the development of national strength.

Precision hardware parts processing process more, and more parts need to be curved processing, when the process of bending, why will the blank hole position change? What are the reasons? What are the preventive measures?

Reasons for the change in position:
 
1, the position of the hole may not be the right size, (bending tension thinning);

2, holes with different centers (bending height is not enough, blank sliding, springback, bending plane fluctuation phenomenon);

3. The bending line and the center line of the two holes are not parallel. The parts whose bending height is less than the minimum bending height show outward opening shape after bending;

4. The hole near the bending line is prone to deformation;

5. Bending radius, bending Angle and material thickness are not well controlled;

6. The neutral layer of the material is not trimmed;

7. The depth of punch into concave die and uneven convex and concave die;

Measures for the causes of different heart problems:

1. Ensure the right and left bending height is correct;

2. Fix the positioning pin and positioning plate after wear;

3. Reduce springback to ensure parallelism and planarity of the two bending surfaces;

4, change the process route, first bending correction before punching.

It shows the outward opening shape game

1, bending to ensure the minimum bending height H(H≥R 2T t material thickness R bending radius);

2. Change the shape of the processed parts, and drop the part less than the minimum bending height without affecting the use.

Holes close to the bending line are prone to deformation measures:

1, in the design of bending parts to ensure that from the bending part to the hole edge X greater than a certain value X≥(1.5-2.0) T t bending sheet thickness;

2. Design an auxiliary hole in the bending part to absorb the bending deformation stress, which can prevent the deformation of the hole near the bending line. Generally, the scheme of bending before punching is adopted.