CN1287038A - Digitally controlled mold-free plate molding machine - Google Patents

Abstract

The plate molding machine consists of a frame, a working platform, a plate fixture, a cylinder support mechanism, a double-lead screw driven X-shaft transmission mechanism, a single-lead screw driven Y-shaft transmission mechanism on a moving beam, a single-lead screw driven Z-shaft transmission mechanism on a carriage. The three shafts, X, Y and Z, are computer controlled to move associatively. The tool carrier installed at one end of a block may carry a laser with optical system for laser cutting of plate. The machine is simple in structure, high in rigidity, high in accuracy, reliable and low in cost.

Description

Plate CNC moldless forming machine

The invention belongs to a multifunctional forming processing machine capable of performing numerically controlled moldless plastic forming of plates, numerically controlled three-dimensional milling of non-metallic material models and laser cutting of plate materials.

So far, most of the processing of shell-like workpieces such as automobile panels has been calendered with a press. This method is limited in the depth of stretching and the complexity of forming. Moreover, the manufacturing cost of the mold is high and the manufacturing cycle is long. These problems are a big obstacle for enterprises when they develop new products and compete for the market.

Matsubara Shigeo of Japan proposed the method of sheet metal numerical control incremental forming. The representative works of his research results were published in Vol.35, No.398, March 1994, 256-261 and Vol.35, No.406, November 1994, 1311-1316 of the Japanese magazine "Plasticity and Processing"; Japanese Journal of "Pushス Technology", 1998, Vol. 36, No. 10, 109-115. Its working principle is: put the plate to be processed on a mold core, and clamp the material around the plate with a pressing plate, which can slide up and down along the guide column. During processing, fix the device on a three-axis linkage end milling machine tool, use a pre-programmed processing program to control a tool head to follow the contour line, and gradually press the plate against the mold core, and finally form it into a part .

But this method has following shortcoming: (1) when implementing the processing of sheet material, what used is general general end milling machine tool. Its tools are slow and invariable during processing, and are not suitable for high-speed and variable-speed processing required for sheet metal layering processing. (2) The end milling machine is designed for cutting, and its load capacity is limited, so it is not suitable for plastic processing of plates. (3) The size of the worktable is only used for cutting processing, and it is not suitable for installing the clamping mechanism required for sheet metal forming.

The object of the present invention is to aim at the deficiencies in the prior art and to provide a processing machine specially designed for layered forming of plates. At the same time, the present invention can have the functions of three-dimensional numerical control milling and plate laser cutting.

The composition of the plate numerical control moldless forming processing machine of the present invention is as follows:

It is composed of frame type fuselage 1, moving beam 4, sliding plate 6, slider 9, working platform 15, plate clamping mechanism, supporting cylinder 13, computer control system and other main parts. On the upper end of the machine body 1, there is an X-axis transmission mechanism composed of two ball screws 3 driven by a motor. The moving beam 4 driven by the two ball screws 3 is combined with the bed 1 through a linear guide rail. The two ball screws The rod 3 can drive the moving beam 4 to move along the X-axis; the Y-axis drive mechanism installed on the moving beam 4 is driven by the Y-axis on the moving beam 4. The slide plate 6 driven by the screw rod 5 is combined with the moving beam 4 through a linear guide rail , the Y-axis driving screw 5 is combined with the sliding plate 6, and can drive a sliding plate 6 to move along the Y-axis; the Z-axis driving mechanism arranged on the sliding plate 6 is a slider 9 driven by the Z-axis driving screw rod 8 Through the combination of the linear guide rail and the sliding plate 6, the Z-axis drive screw 8 is combined with the slider 9, and can drive the slider 9 to move up and down along the Z-axis; a tool clamping device 10 is arranged at the lower end of the slider 9;

Said plate clamping mechanism and supporting mechanism are made of clamping plate 11, supporting plate 12, cylinder 13, guide column 14, guide sleeve 16, and plate clamping mechanism is arranged on the working platform 15, and the working platform 15 is provided with four The guide sleeve 16 for guiding is provided with four guide pillars 14 at the bottom of the pallet 12, and the guide pillars 14 are arranged in the guide sleeve 16, and a splint 11 is arranged above the pallet 12; , be provided with supporting plate 12 and can drive supporting plate 12 to make up and down movement cylinder 13.

The numerical control moldless forming processing machine for plate materials in the present invention controls the motors driving the X, Y, and Z axes through computer control, so that the three-axis linkage of the X, Y, and Z axes is realized, and the tool clamping device installed at the lower end of the slider 9 is controlled. The tool head in 10 realizes any three-dimensional curve movement. Cooperate with the plate clamping and supporting mechanisms (11, 12, 13, 14) arranged on the surface of the working platform 15 to perform three-dimensional curved surface forming processing on the plate. If an external power head is installed at the lower end of the slider 9, three-dimensional curved surface cutting can be performed; if a focusing lens is installed at the lower end of the slider 9, combined with another laser and optical path system, the laser cutting of the plate can be carried out processing.

The sheet material numerical control modelless forming processing machine of the present invention, carries out sheet material forming process as follows:

The data obtained by slicing and layering the CAD 3D model is converted into NC data, and the three-axis linkage is controlled by the computer, and the tool head placed at the end of the slider is controlled to selectively carry out the plate fixed on the clamping and supporting mechanism. Layered molding processing. If the set layer spacing is Δh, control the tool head with the top of the workpiece as the zero point, so that the lower end of the tool head drops Δh from the zero point to roll the plate, and then execute the movement according to the trajectory obtained by the contour line of the layer to process the The shape of the layer. Then lower the height of Δh and repeat the above process, and so on, until the forming of all layers is completed, and the workpiece with the desired shape can be processed.

The plate numerical control moldless forming processing machine of the present invention has the following advantages:

(1) The fuselage adopts the overall frame structure of steel plate bending and welding, which has good rigidity and is beneficial to improve the dimensional accuracy of the workpiece. Low manufacturing cost, easy installation and maintenance.

(2) The moving beam adopts the plate bending and welding structure, which has small mass and good rigidity, which is beneficial to increase the processing speed and thus improve the production efficiency.

(3) The movement of the moving beam on the X axis is driven by double screw rods, which helps to increase the transmission rigidity and improve the machining accuracy.

(4) The plate bracket adopts four guide pillars and guide sleeves as the guiding structure, which has good rigidity, simple structure, reliable operation, high guiding precision and low manufacturing cost.

(5) The plate support is supported by two cylinders. By controlling a certain pressure of the cylinder, a certain back pressure can be obtained when processing the plate, so as to improve the control performance of the plate forming. Also available two hydraulic cylinders can replace these two cylinders.

(6) The present invention can realize one machine with multiple functions. By exchanging different tools, it can not only perform plate forming processing, three-dimensional milling processing of non-metallic material models, but also perform laser cutting processing of plates.

Attached Figure 1: Front view of the principle of the plate CNC moldless forming machine;

Accompanying drawing 2: Schematic diagram of the principle of the plate CNC moldless forming machine;

Attached Figure 3: Top view of the principle of the plate CNC moldless forming machine (x-axis dual-motor drive);

Attached Figure 4: Top view of the principle of the sheet metal CNC moldless forming machine (x-axis single motor plus synchronous belt drive);

Accompanying drawing 5: Working principle diagram of sheet metal numerical control moldless forming processing machine.

The numerical control dieless forming machine for plate materials according to the present invention will be further described below in conjunction with the examples.

1. The multi-functional CNC forming machine is composed of a frame body 1, a moving beam 4, a sliding plate 6, a slider 9, a working platform 15, a plate clamping support mechanism, and a computer control system. The top of the fuselage 1 is provided with a double-screw ball 3 synchronous driving device of the moving beam 4 moving in the X axial direction, and the double-ball screw 3 synchronous driving device of the moving beam 4 can be synchronized with two servo motors 2 Drive the transmission mechanism of two ball screw rods 3 to realize, can also use a servomotor 18 to drive two synchronous belts 19 to synchronously drive the transmission mechanism of two ball screw rods 3 to realize;

The driving device of the sliding plate 6 that is provided with the Y axial movement on the moving beam 4, the driving device of the said sliding plate 6 is realized by the Y-axis driving screw mandrel 5 transmission mechanism, and its driving force can adopt the servo motor 17, and the servo motor 17 can be used for the driving force. The servo motor 17 can be arranged at the end of the Y-axis driving screw mandrel 5 .

The driving device of the slide block 9 moving in the Z axial direction is arranged on the sliding plate 6, and the driving device of the said sliding block 9 is realized by the Z-axis driving screw mandrel 8 transmission mechanism, and its driving force can adopt the servo motor 7, and Serving motor 7 can be arranged on the end of Z-axis driving screw mandrel 8.

A tool clamping device 10 is provided at the bottom of the slider 9, which can clamp a forming tool or an external power head to realize milling of a three-dimensional curved surface.

The plate clamping mechanism is arranged on the working platform 15 , and four guide pillars 14 are arranged at the bottom of the supporting plate 12 , which can be guided by four guide sleeves 16 arranged on the working platform 15 . The up and down movement of the supporting pallet 12 is realized by two cylinders 13 arranged under the work surface. When the plate forming process requires applying back pressure, it can be realized by injecting the required pressure into the cylinder 13 . When the pneumatic system cannot meet the back pressure requirements, the hydraulic system is used instead of the pneumatic system.

Two, the sheet metal numerical control moldless forming processing machine of the present invention, its process is as follows when carrying out sheet material forming processing:

First install and fix a prefabricated plate support 21 on the working platform 15 , place the plate on the support, and clamp the plate on the supporting plate 12 with the splint 11 . Then, according to the trajectory data obtained by the contour line obtained by slicing and layering the CAD three-dimensional model, it is converted into NC data, and the three-axis linkage of X, Y, and Z is controlled by the computer to control the movement of the tool head placed at the lower end of the slider 9, and the fixed The plate 20 on the support 21 and the supporting mechanism is selectively layered and formed, and the layered layer spacing is set to Δh, and the tool head is controlled to perform contour rolling processing on the plate on the X-Y plane. After the processing of this layer is completed , control the Z-axis transmission system to lower the tool head to a height of Δh in the Z-axis, and then perform processing as described above to process the shape of the layer. Then lower the tool head to a height of Δh and repeat the above process, and so on, until all the layers are formed, and the desired shape of the workpiece can be processed.

Three, the sheet metal numerical control moldless forming processing machine of the present invention, its process is as follows when carrying out three-dimensional milling processing:

Remove the plate support 21 fixed on the working platform 15, lower the plate supporting plate 12 and put it on the working platform panel, and use the T-shaped groove on the panel to fix the processed material on the working panel. Unload the tool head at the lower end of the slide block 9, install an outsourced power head on the lower end of the slide block 9, and install a milling cutter, adopt the general numerical control processing program, and use the computer control system of the present utility model to process the material Perform three-dimensional surface processing.

Four, the plate numerical control modelless forming processing machine of the present invention, its process is as follows when carrying out plate laser cutting processing:

Remove the plate support 21 fixed on the work flat 15, and clamp the plate on the supporting plate 12 with the clamping plate 11. Remove the tool head 10 at the lower end of the slider 9, install a laser focusing mirror on the lower end of the slider 9, utilize the additionally designed external optical path system and laser, and the computer control system of the present invention to cut the plate through the focusing mirror.

Claims (7)

1. A numerically controlled moldless forming machine for sheet metal, consisting of a frame-type body (1), a moving beam (4), a sliding plate (6), a slider (9), a working platform (15), a sheet clamping mechanism, The supporting cylinder (13), computer control system and other main parts are characterized in that an X-axis transmission mechanism composed of two ball screw rods (3) driven by a motor is arranged on the upper end of the fuselage (1). The moving beam (4) driven by the screw (3) is combined with the bed (1) through the linear guide rail, and the two ball screws (3) can drive the moving beam (4) to move along the X-axis; ) on the Y-axis driving mechanism, the slide plate (6) driven by the Y-axis driving screw (5) on the moving beam (4) is combined with the moving beam (4) through a linear guide rail, and the Y-axis drives the screw (5) ) combined with the slide plate (6), and can drive a slide plate (6) to move along the Y axis; the Z-axis drive mechanism arranged on the slide plate (6) is driven by the Z-axis drive screw (8) to drive the slide The block (9) is combined with the sliding plate (6) through the linear guide rail, and the Z-axis drive screw (8) is combined with the slider (9), and can drive the slider (9) to move up and down along the Z-axis; The lower end of the block (9) is provided with a tool holding device (10); Said sheet material clamping mechanism, support mechanism are made of splint (11), supporting plate (12), cylinder (13), guide post (14), guide sleeve (16), and sheet material clamping mechanism is arranged on work platform (15 ), four guide sleeves (16) for guiding are provided on the working platform (15), four guide posts (14) are arranged at the bottom of the supporting plate (12), and the guide posts (14) are arranged on the guide In the sleeve (16), a splint (11) is provided on the supporting plate (12); at the bottom of the bed under the work surface, a supporting plate (12) is provided and can drive the supporting plate (12) to move up and down. (13). 2. The processing machine according to claim 1, characterized in that the two ball screws (3) of the X-axis are combined with two drive servo motors (2). 3. The processing machine according to claim 1, characterized in that the two ball screws (3) of the X-axis are combined with a servo motor (18) through a synchronous belt. 4. The processing machine according to claim 1, characterized in that said support cylinder (13) is a pneumatic system. 5. The processing machine according to claim 1, characterized in that said support cylinder (13) is a hydraulic system. 6. The processing machine according to claim 1, wherein said tool holding means is a tool changeable holder.

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