The research results of the "Eighth Five Year Plan" National Science and technology project is an advanced manufacturing system integrating computer technology and multi-point forming technology. The prototype is a three beam four column structure. High precision prototype with four degrees of freedom (x, y, z-axis, z-axis rotation). Its main parameters are as follows: the total forming force is 50kN, and the basic size of cross section is 14 × 14 (mm), the number of upper and lower basic body was 100, and the basic body position was 1 ± The forming area is 140 mm × The forming area is 140 ′ 140mm, and the forming size is 280 ′ 1000mm.

No die forming laboratory, Institute of roll forging technology, Nanling campus, Jilin University

Yam3 multi point forming press for sheet metal

Yam3 630kn sheet metal multi-point forming press is a kind of multi-point forming press with blank holder function. It is characterized by a large number of primitives and a flexible blank holder, which can realize multi-point forming of sheet metal and complex shape.

The main frame is a three beam and four column structure, and the working oil cylinders are eccentrically arranged to increase the forming size of the equipment. The maximum forming pressure is 630kn, and the upper and lower basic body groups are 32 × The cross section size of the basic body is 10 × The upper and lower primitives are composed of 1280 primitives respectively, and the primary forming size is 320 mm × 400mm。 Its width direction can form 2.5 times of the width of one-time forming surface; However, the length direction has no strict restriction on the length of the formed part.

630kn multi-point forming press is suitable for sheet metal forming with a thickness of about 1 mm. More than 200 cases of human skull forming have been carried out.

Yam4 rapid shape adjusting multi point forming press

All the basic parts of yam4 200kn rapid shape adjustment multi-point forming press can be adjusted at the same time, and the efficiency of shape adjustment is increased by dozens of times. It belongs to the structure of three beams and four columns, and the basic body group is eccentrically arranged relative to the hydraulic press. The maximum forming pressure of the equipment is 200kn, and the upper and lower basic body groups adopt 12 × The cross section size of the basic body is 26 × 26mm, one-time forming size is 320 × 400mm。 Formable 1200 × 4000 mm, and the height difference of formed parts is 200 mm. When the segmented forming method is adopted, two times of the width of the forming surface can be formed in the width direction; There is no strict length limit for the formed part in the length direction. As long as the formed part does not interfere with the frame, an infinite length part can be formed.

The upper and lower basic body groups of 200kn rapid shape adjusting multi-point forming press are adjusted at the same time. The adjusting time of this structure has nothing to do with the number of basic bodies, but only with the stroke of basic bodies and the speed of adjusting motor; Compared with the manipulator, the efficiency of shape adjustment is obviously improved.

The equipment has participated in four large exhibitions in Beijing and Shanghai, and has been exhibited in the exhibition area of the Ministry of science and technology of Shanghai International Industrial Exposition. It has been paid attention by relevant leaders and professionals, and won the innovation award of Shanghai International Industrial Exposition in 2003.

Yam5 medium thickness multipoint forming press

Scientific research achievements of 211 Project in Jilin University. Yam5 3150kN multi-point forming press is the latest multi-point forming press at present. All the basic parts of yam5 can be adjusted at the same time. The efficiency of shape adjustment is increased by dozens of times, and the blank holder function can be realized. It belongs to frame structure, and the basic body group is installed in the center of the hydraulic press. The maximum forming pressure of the equipment is 315kn, and the upper and lower basic body groups are 32 × The cross section size of the basic body is 20 × 20 mm, and the size of one-time forming is 640 × 800mm, forming 1200 × The height difference of the formed part is 200 mm. There are 40 blank holder cylinders on yam5 multi-point forming press, which are respectively arranged around the upper and lower basic bodies. For heavy plate parts with large deformation, using flexible blank holder can effectively solve the problem of wrinkling. It can realize rapid dieless forming of medium and heavy plate parts.

Cly555 three dimensional non contact measuring instrument

Cly555 type three-dimensional non-contact measuring instrument is an instrument which uses laser detection technology to measure the shape of three-dimensional curved parts of large sheet metal. The testing range of this non-contact laser measuring instrument is 500 × five hundred × 500mm。 By using the special program for measurement, the dot matrix of the measured data is restored to the illumination map of the measured shape, and compared with the designed shape of the workpiece, the error analysis nephogram of the two shapes is obtained.

The non-contact three-dimensional measuring instrument measures the three-dimensional lattice of three-dimensional surface parts, and realizes the optimal registration between the product measurement data and the target model data. The error distribution of the actual product is calculated to provide the shape correction model data of the product surface for the multi-point forming press. The cly555 three-dimensional non-contact measuring instrument is used to realize reverse engineering calculation.