JPH0215827A - Method for determining automatically bending die - Google Patents

Abstract

PURPOSE:To quickly, surely and automatically determine a bending die by checking in advance the availability to a machine and a product and decreasing many dies to those which have the availability, and executing an interference check only with regard to the dies which have been decreased. CONSTITUTION:Die characteristic data is registered in advance. This data consists of a pressureproof degree, die height and die length of a punch 1 and a die 3, groove width V, a punch tip curve R, a punch tip angle alpha, a die tip angle beta, etc. By a pressureproof check, the number of dies is decreased, and from die height B, C, stroke length is checked, and die length, groove width V/plate thickness T, the minimum flange length, bending-in R and a bending angle theta are studied. By selecting said step, the number of dies is decreased to several pieces to ten and several pieces as the dies which can be utilized for a machine and a product, an interference check is executed by a simulation of bending of every process, and an available die is selected. In such a way, the number of dies which are brought to interference check is decreased, and the die which has been determined can always be utilized.

Description

[Detailed description of the invention] (Purpose of the invention) (Industrial application field) The present invention relates to a method for automatically determining a bending die.

(Prior art) Conventionally, simulations of bending a product with a predetermined mold inspected by a bending machine have been performed. A mold checking method has been proposed that determines whether the mold can actually be used for bending on the condition that there is no interference.

Furthermore, an attempt has been made to develop this interference checking method, to sequentially examine the molds used by the user using an interference algorithm, and to automatically determine the mold for bending processing.

(Problem to be Solved by the Invention) However, in the conventional method for automatically determining gold J17, the entire mold is used as a counter stain and the C pass/fail judgment is performed only by interference check, so it takes a lot of time to make the determination. Not only this, but there are also problems in that the determined mold may not be able to be used later on in the d-machine, or may not be able to be used in practice due to its low pressure resistance.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic bending die determination method that can quickly and reliably automatically determine a bending die.

(Structure of the Invention) (Means for Solving the Problems) The method for automatically determining a bending die of the present invention that solves the above-mentioned problems selects one product from among a large number of various bending dies owned by a user. In the method of automatically determining the optimal bending mold for bending, the user registers the mold data such as the pressure resistance 1 dimension and V width of the mold that the user owns, and then By checking in advance the usability of the machine and the product, such as whether it can be installed on the machine for bending and whether the pressure resistance is sufficient for the entire bending process of the product, The method is characterized in that the molds to be used are determined by narrowing down the molds to only available molds, and then performing a d3 interference check on the narrowed down molds during the bending process between the machine and the product. .

(Function) With the above configuration, in the automatic bending mold determination method of the present invention, by checking the availability of machines and products 1-1, a large number of molds are selected only for those that can be used. Since the interference check is performed only on narrowed-down molds, the number of molds to be checked for interference can be reduced, and the molds determined by the interference check can always be used.

(Embodiment) As shown in FIG. 1, automatic determination of a bending die according to an embodiment of the present invention is started by recording die characteristic data in a file in step 101. .

Registration of mold characteristic data includes pressure resistance, mold hide (Pan Debye) B and die height t-C of bunch 1 and die 3 shown in Figure 2, mold length, groove width V, pan L tip radius. R
, punch tip angle α, die tip angle β, etc.

Next, regarding the machine and product that will start bending, the ram stroke amount of the machine, the thickness of the plate material that will become the product, the minimum flange length of the product, 1 bending radius, 8 bending angle θ
After inputting the required data such as, steps 102 to 108
to check availability. Note that the required data regarding these machines and products is also essential data for the interference check shown in step 110, so
In reality, data for interference checking will be input and a portion of this will be used.

In step 102, a pressure resistance check is performed to narrow down the molds. That is, here, the maximum tonnage after the bending process is determined, and only molds with pressure resistance greater than this number are selected.

In step 103, the maximum stroke amount of the machine when the mold is mounted on the machine is calculated from the mold hides B and C, and this stroke amount becomes the required stroke length required during the bending process. Select only the mold.

In step 104, the mold length is checked.

That is, only molds that are longer than the maximum bending length or that can be assembled for a longer length are selected.

In step 105, the minimum groove width V is determined depending on the plate thickness T and material.
must be limited, a value V/T is calculated by dividing the groove width V by the thickness of the plate, and only those for which this value V/T is equal to or greater than a predetermined value set depending on the material are selected.

In step 106, the minimum flange length is checked. That is, in order to perform bending with the minimum flange length, it is necessary to be able to bend the seven flange lengths, so only molds with groove widths smaller than the predetermined groove width V are selected.

In step 107, the internal bending radius of the product is examined. That is, in order to bend this inner bending radius, it is necessary to have a punch tip radius R smaller than this radius, so only a punch with a tip radius R smaller than the inner bending radius is selected.

In step 108, the bending angle θ is considered.

The minimum bending angle θ of the product is determined, and in order to be able to bend this angle θ, only molds that can bend at an angle more acute than this angle θ are selected.

Through the selection in steps 102 to 108 above, the number of molds that generally exist in the hundreds or more types is narrowed down to a few to several dozen molds that can be used for machines and products, and step 10
In step 9, the product is selected as a candidate mold that can bend the product in step 110.

In step 110, it is assumed that the candidate molds are mounted on a machine, and a bending simulation is performed for each process to check for interference and determine molds that can actually be used.

As described above, in the automatic determination of the bending mold of this example, the number of interference checks can be reduced, so that the optimal mold can be quickly and automatically determined. Further, since the usability for the machine and the product is checked in steps 102 to 108, there is no possibility that the determined mold cannot be installed in the machine or that the mold has insufficient pressure resistance.

In the above example, the process from step 101 onwards was performed on all molds owned by the user, but only on molds of predetermined categories such as special molds, general molds, molds with ears, and two-part molds. It is also possible to do this.

The present invention is not limited to the embodiments described above, but can be implemented in other forms of currency by making appropriate modifications.

[Efficacy of invention Song Dynasty]

As described above, since the present invention is a method for automatically determining a bending die as described in the claims, it is possible to reduce the number of dies to be checked for interference, and the dies determined by the interference check are It is always available, and the bending die can be automatically determined quickly and reliably.

[Brief explanation of the drawing]

FIG. 1 is a flowchart of an automatic mold determination method according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the molds (punch and die). 1... Punch 3... Die B... Punch height C... Die hide ■... Groove width
α...Punch tip angle β...Die tip angle R...Punch tip R Agent Patent attorney Yasu Miyoshi Figure 2 Figure 1 Hand 1N Director 1, Kushii A'1 Indication 2. Name of the invention 3. Address (residence) of the person making the amendment Name (name), ・11. Address of the agent (following city official letter) (spontaneous) February 3, 1988 Special application for the government office 1983 -165992 Automatic determination method for bending mold

Claims (1)

[Claims] In a method for automatically determining the optimal bending die for bending a product from among a large number of various bending dies owned by a user, the pressure resistance, dimensions, and V of all dies owned by the user are determined. Register mold data such as width, and check whether it can be installed on the machine when bending one product with one machine.
By checking in advance the usability of the machine and product, such as whether the pressure resistance is sufficient for the entire bending process of the one product, the large number of molds is narrowed down to only those that can be used, and then the molds are narrowed down. A method for automatically determining a bending die, characterized in that the die to be used is determined by checking interference between the machine and the product during the bending process.