JPH04256546A - Automatic programming device for grinding machine - Google Patents

Abstract

PURPOSE:To make a processing program of a grinding resistant material and a long-size article and extensively shorten a program making time by processing one surface to be ground by way of dividing it into an optional number of grinding cycles. CONSTITUTION:A process data memory means 9 to memorize a machining allowance specified in a processing cycle to process each surface to be ground and measurement and a means 8 to memorize a remaining machining allowance of each processing cycle are provided. Additionally, it is made possible to specify an optional number of processing cycles on one surface to be ground by providing a processing program making means 10 to make a processing program 11 to carry out grinding processing from processing cycle starting dimensions keeping the machining allowance and the remaining machining allowance from the dimensions in accordance with each processing cycle to processing cycle finishing dimensions keeping the remaining machining allowance from the dimensions.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic programming device for a grinding machine that creates a machining program from a specified grinding cycle for each predetermined grinding surface of a workpiece.

0002

[Prior art] In a grinding machine, from the characteristics of the grinding process,
When grinding two grinding surfaces, the grinding wheel is used to reduce the cutting speed in stages. In order to accommodate this and to simplify data input, the automatic programming device for grinding machines allows you to specify a grinding cycle with a fixed number of cutting steps, such as air cut, rough, coarse, and fine, for each grinding surface. It has become. Furthermore, methods for commanding the cutting direction of each grinding cycle can be broadly classified into the following two methods. One is the final shape standard based on the final shape which is the processing drawing dimension,
The other is a material shape standard based on the material shape of the workpiece before grinding. Automatic programming equipment for grinding machines can internally program each machining cycle by specifying the machining allowance and finished dimensions if it is based on the final shape, or the machining allowance and material dimensions if it is based on the material shape, for each machining cycle.
It is possible to automatically calculate the depth of cut and create a machining program for a given workpiece.

FIG. 6 is a block diagram showing an example of such an automatic programming device for a grinding machine. An operation panel 3 having a CRT 1 and a keyboard 2 capable of displaying graphics, a display control section 4, an input control section 5, a workpiece shape memory section 6, an editing control section 7, a grinding cycle data storage section 9,
A machining program creation section 10 is provided. In FIG. 6, various instructions and operation commands SB from the keyboard 2 are converted into editing commands SD via the input control section 5 and read into the editing control section 7. Further, the display control unit 4 issues a control command SA to the CRT 1 in accordance with a display command SC from the editing control unit 7.
is created and displayed on the CRT1. The editing control unit 7
The finished dimensions and material dimension data SE of each grinding surface stored in the workpiece shape memory section 6 are read out, and the machining allowance read from the keyboard 2 is written to the grinding cycle data memory section 9 as machining data SF to create a machining program. The section 10 creates a machining program 11 from the grinding cycle data SH read out from the grinding cycle data storage section 9. In this example, the workpiece shape 31 stored in the workpiece shape memory unit 6 is displayed as shown in FIG. Finished dimensions or material dimensions can be read out, and a machining program can be created by repeating the designation of the grinding surface and the input of the machining allowance on the screen shown in Figure 4 (b) for all the grinding surfaces that require grinding. can.

0004

[Problem to be solved by the invention] The problem here is when the workpiece is a difficult-to-cut material or a long object, and in order to ensure accuracy, the grinding cycle for one grinding surface must be divided into smaller parts. , it is necessary to take measures such as increasing the number of cutting stages or changing the execution order of finely divided grinding cycles. For example, in the case of a long object, an example of which is shown in FIG. 3, each grinding surface a,
When machining to the finished dimensions in the order of b, the ground surface b
Due to the deflection that occurs during rough machining, run-out occurs on the already ground ground surface a, so the grinding cycle is divided into rough and finishing, rough machining is performed on all the ground surfaces, and then finishing machining is performed on all the ground surfaces. must be done. However, with conventional automatic programming devices for grinding machines, the number of cutting stages is fixed and a machining program is created to machine each grinding surface to the finished dimensions, so the machining program for the difficult-to-cut materials and long materials described above cannot be used. could not be created. Normally, the machining program for such a workpiece is long and complicated, so it takes a lot of time to create the machining program, and program errors are also likely to occur.

[0005] In summary, in a grinding machine, due to the characteristics of grinding, when grinding one processed surface (grinding surface), the grinding wheel is used to reduce the cutting speed in stages. In order to accommodate this and simplify data input, the automatic programming device for grinding machines allows you to specify a machining cycle with a fixed number of cuts, such as air cut, rough, coarse, and fine, for each grinding surface. Furthermore, by specifying the machining allowance for each machining cycle, the finished dimensions if it is based on the final shape, or the material dimensions if it is based on the material shape, the cutting speed and depth of cut for each machining cycle are automatically calculated internally. It is possible to create a machining program for a given workpiece. The problem here is when the workpiece is a difficult-to-cut material or a long item, and in order to ensure accuracy, it is necessary to divide the machining cycle of one grinding surface into smaller parts, increase the number of cutting steps, or It is necessary to change the execution order of the finely divided machining cycles. For example, with long objects, if each grinding surface is machined to the finished dimensions at the same time, runout will occur, so the machining cycle must be divided into roughing and finishing, and finishing should be performed after roughing all the ground surfaces. . With current automatic programming devices for grinders, the number of cutting stages is fixed and a machining program is created to machine each grinding surface to the finished dimensions, so it has not been possible to create a machining program for the above-mentioned workpiece.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to enable an arbitrary number of grinding cycles to be specified for one grinding surface, and to improve machining programs for difficult-to-cut materials and long objects. An object of the present invention is to provide an automatic programming device for a grinding machine that can also be used to create a grinding machine.

[0007]

[Means for Solving the Problems] The present invention relates to an automatic programming device for a grinding machine that creates a machining program from a grinding cycle and grinding conditions specified for each predetermined grinding surface of a grinding workpiece. The above objects include a grinding cycle data storage means for storing the machining allowance and finished dimensions specified for each grinding cycle, a storing means for storing the remaining machining allowance that is not processed in the grinding cycle, and a storage means for storing the machining allowance and the remaining machining allowance in the finished dimensions. This is achieved by providing a machining program creating means for creating a machining program for grinding between a grinding cycle start dimension, which is the sum of the remaining machining allowance added to the finished dimension, and a grinding cycle end dimension, which is the finished dimension plus the remaining machining allowance.

[0008] In addition to the grinding cycle data storage means for storing the specified machining allowance and material dimensions, a storage means for storing the amount of grinding that has been completed in the grinding cycle;
Corresponding to the grinding cycle, grinding is performed from a grinding cycle start dimension that cuts the already ground amount from the material size to a grinding cycle end dimension that cuts the already ground amount and machining allowance from the material size. This is achieved by providing a machining program creation means for creating a machining program.

[0009]

[Operation] According to the automatic programming device for a grinding machine of the present invention, when processing one grinding surface, it is possible to specify an arbitrary number of grinding cycles in which the remaining machining allowance is gradually reduced. In this case, it is possible to perform processing in which the number of cutting steps is divided into smaller sections. Furthermore, in the case of a long workpiece, the above-mentioned machining program for the workpiece can be created by changing the execution order of the grinding cycle created by dividing it into rough machining and finishing machining.

Furthermore, when processing one ground surface, the same effect can be obtained even if an arbitrary number of processing cycles can be specified in which the amount of grinding that has already been done is increased stepwise.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an example of the automatic programming device for a grinding machine according to the present invention, corresponding to the block diagram of the prior art shown in FIG. has been added, other identical constituent blocks are given the same reference numerals, and explanations regarding the same operations will be omitted.

In FIG. 1, the editing control unit 7 stores the remaining machining allowance or grinding amount SG input from the keyboard 2 via the input control unit 5 in the remaining machining allowance (grounding amount) storage unit 8, and also reads it out. Let's do it. At this time, when the workpiece shape stored in the workpiece shape memory section 6 is based on the final shape, the remaining machining allowance is used, and when the workpiece shape is based on the material shape, the already ground amount is used.

The operation of the editing control section 7 related to the present invention in the automatic programming apparatus for a grinding machine constructed as described above will be described first with reference to the flowchart of FIG. 2 in the case where the shape of the workpiece is the final shape reference.

First, the editing control section 7 stores the workpiece shape memory section 6.
Then, the workpiece shape SE is read out and displayed on the CRT 1 (step S1). Next, we wait for the operator to input the designation of the grinding surface (step S2), and read out the finished dimensions of the workpiece from the position of the workpiece shape SE corresponding to the input grinding surface, and store it in the grinding cycle data storage section 9 (step S3). ). Then, wait for the operator to input the machining allowance (
Step S4), and the input machining allowance is similarly stored in the grinding cycle data storage section 9 (Step S5). Further, the input of the remaining machining allowance is waited (step S6), and the input remaining machining allowance is stored in the remaining machining allowance (already ground amount) storage section 8 (
Step S7). Next, from the finished dimensions, machining allowance, and remaining machining allowance stored as described above, the grinding cycle start dimension for starting the grinding cycle and the grinding cycle end dimension for completing the grinding cycle are calculated, and these dimension data are converted into the grinding cycle data. The information is stored in the storage unit 9 (step S8). In this case, the grinding cycle start dimension is the finished dimension plus only the machining allowance and remaining machining allowance, and the grinding cycle end dimension is the finished dimension plus only the remaining machining allowance.

Then, the grinding conditions such as the cutting speed and depth of cut for each cutting stage of the grinding cycle for the input machining allowance are automatically determined from various conditions such as the material of the workpiece, and are stored in the grinding cycle data storage section. 9 (step S9). In addition,
Since the method of automatically calculating the grinding conditions is not directly related to the present invention, a description thereof will be omitted. As described above, steps S1 to S9 are repeated for all grinding cycles (step S10, step S11), a machining program is created corresponding to the grinding cycle data stored in the grinding cycle data storage section 9 (step S12), finish.

On the other hand, if the workpiece shape stored in the workpiece shape memory unit 6 is based on the workpiece shape, in step S8, the size obtained by cutting the workpiece size by the amount of grinding already done is set as the grinding cycle start size. , only the dimension obtained by cutting the already ground amount and the machining allowance from the material dimension is set as the end dimension of the grinding cycle, and the other operations are the same. Figure 4
(a), (b), and (c) show examples of image display in step S2, step S4, and step S6, respectively. Further, FIG. 5 shows an example of a machining program created by the automatic programming device for a grinder of the present invention, where DA, DR, DC, and DF are air cut, rough cut, rough cut, and fine cut, respectively. The cutting target position is Fa,
Fr, Fc, and Ff represent the feed speeds of air cut, rough cut, rough cut, and fine cut, respectively, and are NO100 and NO10.
1, No. 102, and No. 103 are sequences for performing air cutting, rough cutting, coarse cutting, and fine cutting, respectively.

[0017]

[Effects of the Invention] As described above, according to the automatic programming device for a grinding machine of the present invention, one grinding surface can be processed by dividing it into an arbitrary number of grinding cycles, so the conventional grinding cycle editing function can be improved. By using it and changing the execution order, it becomes possible to create machining programs for difficult-to-cut materials and long objects that could not be created in the past, greatly reducing program creation time and preventing programming errors. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of an automatic programming device for a grinding machine according to the present invention.

FIG. 2 is a flowchart illustrating the operation of the automatic programming device for a grinding machine according to the present invention.

FIG. 3 is an example of a long workpiece.

FIG. 4 is an example of a screen display of the CRT 1.

FIG. 5 is a diagram showing an example of a machining program created by the automatic programming device for a grinding machine of the present invention.

FIG. 6 is a block configuration diagram showing an example of a conventional device.

[Explanation of symbols]

3 Operation panel 4 Display control section 5 Input control section 6 Workpiece shape memory section 7 Editing control section 8 Remaining machining allowance (already ground amount) storage section 9 Grinding cycle data storage section 10 Machining program creation section 11 Machining program 30 Workpiece 31 Machining object shape

Claims (2)

[Claims] Claim 1: An automatic programming device for a grinding machine that creates a machining program from a grinding cycle and grinding conditions specified for each predetermined grinding surface of a grinding workpiece, which stores machining allowance and finished dimensions specified for each grinding cycle. a grinding cycle data storage means for storing a remaining machining allowance that is not processed in the grinding cycle; a grinding cycle start dimension that is the finished dimension plus the machining allowance and the remaining machining allowance; and a machining program creation means for creating a machining program for grinding between the grinding cycle end dimension and the grinding cycle end dimension,
An automatic programming device for a grinding machine, characterized in that an arbitrary number of grinding cycles can be specified for one grinding surface. 2. An automatic programming device for a grinding machine that creates a machining program from a grinding cycle and grinding conditions specified for each grinding surface, comprising: a grinding cycle data storage that stores machining allowance and material dimensions specified for each grinding cycle; means, a storage means for storing the amount of grinding that has been completed before the execution of the grinding cycle, a machining cycle start dimension that cuts the amount of grinding from the material dimensions, and the amount of grinding that has been done from the material dimensions. and a machining program creation means for creating a machining program for grinding between the machining cycle end dimension where the machining allowance is cut, and an arbitrary number of grinding cycles can be specified for one grinding surface. An automatic programming device for grinding machines featuring: