JPS6067005A - Soft jaw change machining method in continuous machining of various works - Google Patents

Abstract

PURPOSE:To minimize soft jaw machining, by storing those of data on a work, a soft jaw and a core bar. CONSTITUTION:In time of continuous machining for a wide variety of works by a machine tool 1, a lot of soft jaws 6 and core bars 17 for jaw machining use are provided for that and those of work, soft jaw and core bar data are stored in a memory, while each time a type of works to be machined, as machining these works in small diametral order, is changed, the propriety of change in the soft jaw is judged on the basis of the stored data, and shift pitch numbers of the soft jaw 6 and a diameter of the core bar 17 required for machining the soft jaw 6 are calculated, and according to the result, change and shift of the soft jaw 6 are performed, then soft jaw machining takes place. Thus, automation in the continuous machining of a wide variety of works is well promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a machining method for replacing green jaws that is suitable for continuous machining of a variety of workpieces.

As is well known, the raw jaws are attached to the chuck at the end of the spindle and then sharpened with a boring tool to match the diameter of the workpiece before use.
To accurately center a C double crop without being affected by installation errors of natural nails.

In addition, since the raw jaws are fully machined to match the diameter of the workpiece, the workpiece can be stably held during machining.

With the recent automation of machine tools and production lines based on unmanned and system-oriented systems, a series of processing processes from workpiece processing, from rough processing to finishing processing, are required.
ff. Since this process is performed automatically and continuously even when the type of workpiece changes, C2. Automatic replacement of the raw jaw and self-assisted replacement of the raw jaw jig, that is, the mandrel used in machining the raw jaw, is required. .

However, conventionally, replacement devices for green jaws and layering devices for mandrels have been provided, but whenever the type of workpiece, that is, the shape and diameter of the workpiece changes, it is necessary to select a green jaw and mandrel suitable for the workpiece. Previously, everything was done by human workers, but now the machine tools and production lines are fully automated, which has become a bottleneck. In addition, if there are many types of workpieces, the frequency of replacing and machining the raw jaws will increase.
It is economically important to reduce the total amount of machining of raw nails (-
However, with the conventional manual method, it was not possible to reduce the amount of machining of the raw nails.

The present invention has been made in view of the above-mentioned points 1 and 5. The purpose of the present invention is to process raw nails in principle. The object of the present invention is to provide a method for automatically replacing a raw jaw by determining the optimum soft jaw replacement, softness and core diameter while reducing the amount of raw jaw machining. When a machine continuously processes a variety of workpieces, it is equipped with a large number of green jaws and a large number of mandrels for machining raw jaws, stores the workpiece data, raw jaw data, and mandrel data in a storage device, and processes the workpieces in order of small diameter. However, when the M of the workpiece to be machined changes, the system determines whether or not to replace the raw jaw based on the data stored in the memory device [R, calculates the number of shift pitches for the raw jaw and the core diameter required for machining the raw jaw, and calculates the As a result, the present invention has the structure of a method for changing the raw jaws in continuous machining of a variety of workpieces, which is characterized in that the raw jaws are shifted after shifting the raw jaws or the raw jaws are changed. Concrete (Nihoncho) When a machine tool continuously processes a variety of workpieces, it is equipped with a large number of green jaws and a large number of mandrels for machining the green jaws. In the machining method, there is a procedure for storing data on the diameter and shape of the workpiece, data on the diameter and shape of the raw jaw, data on the diameter of the core metal, and data on the diameter of the core metal in the storage device, and data on the diameter of the core metal. Read the data of the smallest workpiece among the workpieces, determine the shape of the raw jaw required for machining, and compare the data of this shape with the data of the shape of the raw jaw installed on the machine tool to determine the need for replacement of the raw jaw. The procedure for determining whether or not the raw jaw needs to be replaced, and the data and storage of the shape and diameter of the raw jaw that are important for machining the workpiece when the raw jaw needs to be replaced. The procedure for comparing and determining whether or not a similar type is defective, and when it is not necessary to replace the raw jaws, and when it is necessary to replace the raw jaws and the similar type is not damaged. A procedure for determining whether or not a free jaw shift has been performed by comparing the diameter of the free jaw when shifted and closed to the smallest extent within the safe stroke range and the value obtained by subtracting the standard machining amount for free jaw machining from the diameter of the workpiece. , If the raw nail shift is not possible for the standard nail, read the data of the standard nail and calculate the required core diameter.
j I member, a hand 111 which reads the raw jaw data and calculates the necessary number of pinches and required core diameter of the raw jaw 77F when there is a raw jaw shift, and a machine tool 111 which reads the raw jaw data and calculates the required number of pinches and the required core diameter of the raw jaw 77F, and the machine tool. In certain cases, the necessity of machining the green jaw is determined by comparing the value obtained by subtracting the diameter of the workpiece from the diameter of the green jaw when the green jaw is opened to the widest extent within the safe stroke range and the required safety of the workpiece device DItη. There is a procedure to understand 1, and when machining the raw nail is required (- Required core diameter f: Calculation procedure, and a similar type that requires replacement of the raw nail. iA1 state and a similar type that requires replacement of the raw nail. The procedure for issuing a raw nail replacement command in the second state in which the natural nail shift is not required and the natural nail replacement is not required and a similar type does not exist and the raw nail software is available, and the procedure for issuing a raw nail replacement command in the third state where the raw nail replacement is not required and the raw nail shift is not required. The procedure for issuing a raw nail shift command in the fourth state where the raw nail replacement is completed and the raw nail shift command is completed, and the fifth state where raw nail processing is required because the raw nail shift is not possible without requiring the raw nail replacement, and the raw nail replacement is completed. A procedure for issuing a mandrel attachment command, a mandrel processing command, and a mandrel removal command in the first and second states and the third and fourth states after the end of the mandrel shift, and a procedure for issuing a mandrel attachment command, a mandrel processing command, and a mandrel removal command, and failure to perform the mandrel shift without requiring the mandrel replacement. In the sixth state, which does not require machining of the raw jaws, and in the first to fifth states, in which the removal of the mandrel has been completed, the process consists of a procedure for issuing information and machining instructions to the machine tool regarding the smallest machining proboscis of the unmachined workpiece. ff: This is a method for machining a raw jaw in continuous machining of multi-stretch workpieces.

Hereinafter, embodiments of the present invention will be described based on the drawings. 1st
The figure is a block diagram of a raw nail replacement system for implementing the raw nail replacement processing method according to the present invention. In Fig. 1, the machine tool 1 may be a numerically controlled machine tool such as a machining center that may be used alone, or a plurality of machine tools connected in parallel or series on a production line may be used. You can also do it. In the embodiment described below, in order to share the diameter range of the workpiece to be machined, it is assumed that three parallel machine tools are used, each of which targets different machining diameter ranges. As shown in FIG. 1, this embodiment further includes a raw nail changing device 2 that also serves as a raw nail shifting device,
It is provided with a mandrel m removal device 3, a storage device 4 including a main storage device, and a central processing unit 5 consisting of a control device and an arithmetic unit connected to the machine tool 1 and each of the devices 2 to 4 described above.

FIG. 2 is a front view illustrating the natural nail changing device 2 and its II.
-II sectional view. A raw nail storage 7 for storing a large number of raw nails 6 is provided outside the machine tool 1, and a guide 8 is installed between the vicinity of the Km raw nail storage 7 and the main body of the machine tool 1. A carrier 10 is movable by the guide 8 and driven by a servo motor 9, and a machining arm 12 is movable in the radial direction of the chuck 13 of the machine tool 1 by driving the servo motor 11 relative to the carrier 10ζ. be. A node 14 is attached to the tip of the arm 12, and He 7
- The hand 14 can be opened and closed by the drive of the servo motor 15 to grip the free jaw 6.

Reference numeral 16 denotes a drive that can be rotated and moved in the radial direction of the chuck 13 by a rotary servo motor that operates a locking member that locks all of the raw jaws 6 to the jaw holder on the chuck 13 side and releases the raw jaws 6. It is a device.

The raw jaw storage 7C2 stores the jK shape of the raw jaws depending on the shape H and diameter of the workpiece to be machined, that is, the height hl+h2+h3+... of the chuck portion 6C as illustrated in FIG. Various types of raw nails 6 having different diameters C are stored in the housing. 52, which replaces the raw nails using the raw nail exchange device 2, releases the locking of the raw jaws 6 mounted on the drive device 16 while gripping the raw jaws 6 mounted on the chuck 13 with the hand 14. By driving the servo motor 11, the jaw 6 is pulled out from the chuck 13 at /:, and the raw jaw 6 is stored in the raw jaw storage t7 by movement C2 of the carrier 10. Next, the necessary raw nails 6 are selected from the large number of raw nails 6 in the raw nail storage 7 and held by the hand 14, and the raw nails 6 are inserted into the chuck 13 to a predetermined position by moving the carrier 10 and the arm 12. Lock it to finish the raw nail replacement. In order to shift the raw jaw 6 attached to the chuck 13 using the raw jaw changing device 2, the raw jaw 6 is released from the lock by the drive device 16 while the raw jaw 6 is gripped by the hand 14, By driving the servo motor 11, the chuck 1 moves the raw jaws 6 by a size corresponding to a predetermined integral multiple of the rack pitch P.
3 in the radial direction and lock the free claw 6. The raw nail replacement device 2 described above is shown as an example of the device used when carrying out the raw nail replacement processing method of the present invention, and the features of the present invention appear in the structure of the raw nail replacement device 2 itself. It's not something that exists. Therefore, the raw nail changing device 2 is not limited to the structure described above, but any other structure can be used as long as it is equipped with a large number of raw nails and can perform raw nail replacement and raw nail shifting.

FIG. 4 is a plan view illustrating the mandrel attachment/detachment device 3 and a front view thereof in the direction of the arrow (■). External part of machine tool 1 (two mandrels 17
A Shinkin storage 18 is provided to store the Shinkin deposit storage 11.
A base 19 is installed 11 at an intermediate position between 1f 18 and the chuck 13 of the machine tool 1. Pig base 19-1
A -z+nicolumn 20 is mounted on the column C2 and is movable in the Z direction, and a 7.1-gear arm 21 is mounted on the column 20 so that it can move up and down in the Y direction, can rotate in the B direction, and is movable in the X direction.

A hand 22 is attached to the tip of the arm 21 so as to be rotatable in the entry direction. The mandrel storage 18 stores a large number of mandrels 17 each having a diameter d at a predetermined pitch. □ The dimensions of the predetermined pinch are determined in consideration of the reduction of raw nail machining bone, which will be described later. In order to perform prefectural tax on the mandrel 17 using the mandrel removal device 3, the upper and lower parts of the arm 21 in the Y direction 11tlI and I3
By turning the arm 21 in the direction, the arm 21 is positioned toward the mandrel 17 of the required diameter in the mandrel storage jπ18, and after the arm 21 is moved in the entire X direction, the mandrel 17 is gripped by the hand 22,
Next, by combining the movement of the arm 21 in the X direction, the rotation of the hand 22 in the A direction, the upward movement of the arm 21 in the Y direction, the rotation in the B direction, and the movement of the column 20 in two directions, the mandrel 17 is moved between the free jaws 6 of the chuck 13. Attach to. Chuck 13 raw jaws 6 spaces C
In order to return the attached mandrel 17 to the mandrel storage 18ζ, the above-described operation for attaching the mandrel to the chuck 13 may be performed almost in reverse. The mandrel attaching/detaching device 3 described above is shown as an example of a device used when carrying out the raw nail replacement processing method of the present invention, and the structure of the mandrel attaching/detaching device 3 itself (2) features of the present invention. Therefore, as long as the mandrel attaching/detaching device 3 is equipped with a large number of mandrels and can insert and remove the mandrel 17 between the free jaws 6 of the chuck 13, the mandrel attaching/detaching device 3 may have the structure 1 described above: Fig. 5 is an explanatory diagram showing the dimensional relationship in the raw jaw shift and raw jaw machining. Figure 5 (a) shows the raw jaw 6 at the standard position of the chuck (= installation and shows the state in which the chuck is opened to the maximum within the safe stroke Ss defined in the narrow range for chuck opening.In this state, the diameter of the free jaw 6, that is, the diameter of the gripping part 6C fc, and the reference diameter, that is, the center The diameter of the gold chuck part 6e is e. Figure 5 (b) shows a state in which the free jaw 6 is shifted and the chamfer '7 is opened within the range of the safe stroke Ss as in No. 51g1 (a). shows.

In this state, the diameter of the raw nail 6 is assumed to be g, and the reference diameter is assumed to be f. Letting the number of shift pitches be X, the shift group has a radius of z7+. Therefore, f=e+2xp, g=c+
5(c) shows a state in which the mandrel 17 having a diameter d is gripped by the free jaws 6, in which 2xp is established. It is assumed that the diameter of the raw nail 6 is fully expanded in this state.

FIG. 5 (2) shows a shaped cap in which the handle portion 6C is machined to have a diameter equal to the diameter of the workpiece. The cutting allowance that has been made to a minimum within the range where the grip part 6C before processing is not left is used as the standard cutting stone. Fig. 5 (7f!
c) After machining the raw jaws, the chuck is shown in the maximum open state within the range of the safe stroke Ss.

In this state, the diameter of the green jaw 6 is set to α, and the mandrel gripped by the mandrel d-removal device or the chuck of the workpiece held by a work feeder (not shown) The safety between the raw jaw and the mandrel or workpiece, which is determined by taking into account the misalignment with respect to the material, is defined as As. Therefore A
It is required that s4α-D=rd≦2Ss. Above, we have explained the case of machining a raw jaw that has been shifted from the reference position in Figures 5 (A) to (E). However, regarding a raw jaw that has already been shifted by 1 unit and has been machined and is attached to the chuck, we will explain the following. When performing raw jaw shift and raw jaw machining in accordance with the workpiece to be machined, the same relationship as shown in Fig. 5 (A) to (B) holds true for ≦ 2. In this case, the chuck with this raw jaw attached The diameter C and the reference diameter e of the raw jaw that can be opened to the maximum within the safe stroke Ss.
are equal to the diameter a and the reference diameter f in the state ζ2 in which the chuck is opened after the previous green jaw machining is completed.

FIGS. 6 and 7 are flowcharts showing various steps of a raw nail replacement method according to an embodiment of the present invention. According to the processing schedule, 10 tons of workpieces, for example, one day's worth of workpieces, are prepared in the work stocker, and a large number of raw nails and mandrels are stored in the raw nail storage and core metal storage, respectively, and the flow shown in Figure 6 is carried out. Start. First, the storage device (as Uni-crop data, the diameter and shape of the workpiece, H5, the raw jaw diameter C1, the shape h, the mandrel chuck part standard diameter e, and the jaw diameter a when unclamping the chuck after machining, and the mandrel data) The diameter d of the mandrel is memorized (step 31).When using multiple machine tools in parallel, the diameter d of the mandrel is memorized.
The workpieces are divided into groups to be machined on one of the machine tools (step 32).

The workpiece assigned to each machine tool has a small diameter
t, M example workpieces are numbered in 1iln. Since multiple 1161 workpieces of the same diameter and the same shape are machined, it is possible to attach the same and % numbers to these one type of workpieces. be. The reason why workpieces are numbered in descending order of diameter is to prevent warts from occurring as the workpieces are machined in descending order of diameter. Therefore, if the workpieces fed to the workpiece feeder are already lined up in descending order of diameter, it is sufficient to perform machining on jli and l, and if the workpieces are lined up randomly on the workpiece feeder, As a device to transfer the workpieces from the machine to the machine tool, use one that can take the workpieces in order of small diameter as instructed by the central processing unit (Step 33) 6 The following steps are common to all machine tools. I will explain one machine tool. First, the workpiece to be machined next, that is, the workpiece bQ, the workpiece data (il-readout step 3
4) As will be explained later with reference to the flowchart of FIG. 7, the raw nail replacement and raw nail processing are performed (step 35). After that, the workpiece is mounted, machining measurement and machining judgment are carried out according to the normal method (steps 36 to 39).
0), step 41) of carrying out the workpieces, and repeating the above procedure until completion for all the workpieces (step 42).

Regarding No. 7M, the flow of green nail replacement and green nail processing will be explained. First, depending on the thickness of the workpiece to be machined next, the shape of the free jaws for gripping the workpiece is determined (step 51).The shape of the free jaws currently attached to the chuck is determined. step 52), A
By comparing il and ho, it is determined whether or not the natural nail needs to be replaced (step 53). When sucking raw nail replacement C
reads out the raw nail data of the raw nails stored in the raw nail storage from the storage device and determines whether or not a similar type is stored (step 54).As for the similar type, the raw nail data is not shifted and is the same as before. Machining by machining a standard machining allowance As using a mandrel with a mandrel diameter of
Select things that can be used to process things. Therefore, when determining similar types, use similar data as I].

fI + dI, and when there is a natural nail that satisfies ==D-Am f(-d14.2 S s As , it is assumed that there is a similar type. If there is a similar type, this is set as the first state.

If it is determined in step 54 that there is no similar type, the standard nail will be used, and when the standard nail is softened for one pitch, within the safe stroke range,
It is judged by the following formula % formula % whether or not it is possible to obtain a raw jaw diameter that takes the standard cutting allowance Am into the workpiece diameter, and whether or not to shift is possible (step 55).
). If the shift is not possible, this is set as the second state, and the mandrel diameter d that allows green nail machining with the standard cutting allowance Am is calculated (step 56). Next, the mandrel with the mandrel diameter d is made sufficiently safe A
Step 57)
, if gripping iJ, the mandrel diameter d' calculated in step 56
f6- is used, and if gripping is not possible, a smaller core metal diameter calculated in step 58 is used, and a larger cutting allowance is taken as the standard cutting allowance Am. Note that the first appearance f1u of d is the mandrel diameter prepared in the mandrel storage. (If you take a fraction, use the mandrel diameter of the value rounded down to the nearest whole number. It is necessary to remove the cutting allowance by the amount equivalent to .

The same applies to each subsequent step (if a fraction occurs in the mandrel diameter d in the second step).

If the river is shifted in step 55, this is set as the third state.

If it is determined in step 53 that the force required to change the nail is small, the currently installed Q2 type 7 will be used, and the possibility of shifting the raw nail (C - Judgment T7. (Step 59): If the software is acceptable, the state is changed to Kintei 4.

If it is determined that the shift is not possible in step 59, it is determined whether the workpiece can be gripped with sufficient safety-As without machining the raw jaws (step 6o), and if the workpiece cannot be gripped, this is the fifth step. Assuming that the shape is 1 m, a sufficient safety As is taken in step 61 (the mandrel diameter dk is calculated in order to perform machining with a minimum machining allowance of 2).

In the case of Tsukudamochi Town in step 60, this is set as f:, the sixth state.

In the third state and the fourth state, 77 topitch number π
A group of steps for determining the mandrel diameter d to be used for machining the raw nail after shifting the raw nail is comprehensively indicated at 62. Step group 62
is an example of a step group for determining X and d for the purpose of reducing the amount of machining of raw nails as much as possible. Therefore, before sequentially explaining each step in the step group 62, the principle will be explained based on FIGS. 8 and 9. Referring to FIG. 8, since the diameter of the gripping portion 6C of the free claw 6 in the maximum open state is φG, the range in which the gripping portion 6C can be positioned without shifting is the range indicated by the Ss arrow. If the standard cutting allowance km is taken as the cutting allowance, the range in which the gripping portion 6C after machining the raw nails can be positioned is 1° as indicated by the arrow. Therefore, since we take safety As for gripping the workpiece, the gripping part 6 after machining the raw jaws
C1: The range of the diameter of the workpiece that can be held more easily is the range indicated by the Q arrow. It is not possible to grip a workpiece with a diameter below the range of Q. Also, to grip a workpiece with a diameter exceeding the range of Q.

The cutting allowance must exceed the standard cutting allowance A77L.

What has been explained above regarding the case of the diameter C of the raw nail is also applicable to the case where the raw nail is shifted. If the diameter of the workpiece W falls within the range of Q in the case where the raw jaw is not fully shifted or when the raw jaw is shifted, then the shift state corresponding to this range of Q is taken to calculate the minimum cutting allowance, that is, the standard cutting allowance ( For example, in Fig. 8, when the diameter of the workpiece W is 1), the diameter is included in the range of Q in the state shifted by 2 pitches, so machining of the raw jaws can be performed by shifting 2 pitches. All you have to do is In addition, in the same figure, when the diameter of the workpiece W is a wire, the diameter I)0
is the range of Q in the state 12 shifted by 1 pitch (2 also includes the range f2 of Q in the state shifted 2 pitches, so it is possible to perform all the machining of the raw nails with a shift of 1 pitch, and machining the raw nails with a shift of 2 pitches. 6 In Fig. 9, when the diameter of the workpiece W is D, the 8th
As shown in the figure, when the diameter of the workpiece W is D; the diameter of the workpiece W is within the range of Q. If the diameter of the workpiece is not included, it is not possible to take the standard machining allowance, and it is necessary to take a shift state that corresponds to the range that minimizes the machining cost.For example, if the diameter of the workpiece is 8 in Figure 9, In some cases, since the diameter D0 is not included in any of the ranges of Q, it is sufficient to perform green nail machining in a state where it is shifted the most among the ranges including the diameter DI, that is, by shifting by one pitch.

The above formula for minimizing the amount of raw jaw machining is shown below. Therefore, C2z, -Q If there is one integer , If there is no integer X that satisfies this condition, Z, or Z, or HL is shifted by the integer X pitch.

The above discussion has been about minimizing the machining allowance, but the actual steps to be taken are explained with reference to Fig. 7-62. Assuming that it is desirable to place the position II' in the center of the range, zf is calculated by P by transforming 0 = 9-2 x p = b + 5s-2Z7) 1 = D-Am + 8s-2Zp (step 63). Since the shift position of the free jaw is regulated by the rack, the large value must be an integer value. When determining an integer value from X calculated in step 63, it is possible to round down or round up X. In step 64, xf is truncated. Calculate the diameter y of the free jaw after shifting (Step 65), compare the diameter of the workpiece with 9 (Step 66), and if I is larger than D, f,
b and d are calculated (step 67).

The core diameter d calculated here is the standard cutting allowance A1 for green jaw machining.
nn is the standard diameter f (which can be achieved with n) ),
If it is a gripping part, use the mandrel diameter d calculated in step 67, and if gripping is not possible, use a smaller mandrel diameter calculated in snap 69 to cut larger than the standard machining allowance A, m. I will pay for it.

If g is not larger than D in step 66, X calculated in step 63 is rounded up with the aim of minimizing the amount of raw nail processing (step 70).

9. Calculate f, b, and d (step 71), and judge whether or not the calculated standard diameter f can grip the mandrel with the calculated mandrel diameter d within the range of the safe stroke ss. In step 72), rounding up <6'c is used as the gripping part length X, and the process proceeds to step 68. Assuming that a cutoff value is used as the ungripable cursor X (step 7:3), y is calculated (step 74), and then the flow merges into step 67.

The determination as to which of the first to sixth states as explained and explained above and the output of X, d, etc. are performed by the central processing unit 5C2 in the first (S1).Next, the sixth In this state, none of the raw nail replacement, raw nail shift, and raw nail processing is performed, and the flow shown in FIG. 6 is then ended.

If it is in the 1st to 5th state, f2 automatically sets the claws and performs the core self-ttfj cent as follows according to the state (steps 75 and 76). In flood 3 condition,
The central processing unit 5 issues a raw nail changing device 2 (second raw nail replacement command), and the raw nail changing device 2 issues a force 1 specified by the command (2).
Replace with similar nails or standard nails. In the third state, when a raw nail replacement end signal is input to the central processing unit 5, and in the fourth state, the central processing unit 5 issues a raw nail shift command to the raw nail replacement device, and the raw nail replacement device 2 is designated by this command. The raw claw shift is performed by the number of shift pitches X. In the first and second states, a raw nail replacement end signal is sent to the central processing unit 5.
, when the end signal of the raw nail shift is input to the central processing unit 5 in the third and fourth states, and in the fifth state, the central processing unit 5 causes the mandrel attachment/detachment device 3 to Issue a mounting command. The mandrel attaching/detaching device 3 attaches a mandrel having a mandrel diameter specified by the command between the green jaws of the chuck. Next, the central processing unit 5 issues a raw jaw machining command to machine the gripping portion 6c of the raw jaw 6 into a size equal to the diameter Dζ2 of the workpiece (step 77).

Judgment is made as to whether the H1 measurement and machining diameter pass or fail (steps 78 and 79). If the machining is not successful, it is determined whether or not it is possible to make corrections to the history (step 8o). If it is possible to make corrections, self-assisted correction is carried out (step 81) Perform 1 processing, and if the shoe is a shoe with a corrector OT, return to step 52 and perform the entire natural nail replacement process again. If the processing is successful, the mandrel attachment/detachment device 3 receives the command to remove the mandrel from the central processing unit 5, and removes the mandrel and returns it to the predetermined position in the mandrel storage 1zt 18 (step 82).
. Next, the take stored in the storage device 4 is updated (step 83), and all steps of the raw nail replacement process are completed.

After that, in response to the workpiece device and the machining command, the machine 1 processes the workpiece as explained with reference to FIG. 6. Using the memory device, one or more machine tools (-) can automatically perform green-jaw replacement and green-jaw machining.

,Therefore, I asked the samurai about the continuous processing of polygonal workpieces at night 1.
It is possible to achieve automation including Tanashi rotation. If it is not necessary to process the raw nails, do not process the raw nails, and when machining the raw nails, as much as possible (process only the cutting allowance), and what to do with the cutting allowance. Only when the workpiece or mandrel cannot be held completely safely, by taking a large machining allowance, the total machining of the green jaw 1.
It is possible to reduce IT. Therefore, it is possible to shorten the machining time of the raw nail and the machining time.

[Brief explanation of the drawing]

The drawings represent embodiments of the present invention, and FIG. 1 is a proshoge diagram, FIG. 2 (A) is a front view of the natural nail replacement device, and FIG. 2 (B) is a sectional view taken along line 11-■ in FIG. 2 (A). , Fig. 3 (a), (b), and (c) are explanatory diagrams of the shape of the raw nails, Fig. 4 (a) is a plan view of the mandrel attaching/detaching device, and Fig. 4 (b) is Fig. 4 (a). Fig. 5 is an explanatory diagram showing the dimensional relationship between green jaw shift and green jaw processing (2), Figure 6 is a flow chart showing an outline of workpiece processing including green jaw replacement processing, and The figure is a flowchart showing the details of the green jaw replacement process, and FIGS. 8 and 9 are explanatory diagrams showing the shift pitch number and the machining range based on the standard cutting allowance. 1. Machine tool 2. Green jaw replacement device 3... Mandrel attachment/detachment device 4... Storage device 5... Central processing unit 6...
・Raw nail 17... heart gold

Claims (1)

[Claims] When continuously machining various types of workpieces using a machine tool, the workpieces are machined in order of small diameter by preparing a large number of raw jaws and a large number of mandrels for machining raw jaws, storing the workpiece data, raw jaw data, and mandrel data in a storage device. While doing so, each time the type of workpiece to be machined changes, based on the data stored in the storage device, it is determined whether or not to replace the raw jaw, and the number of shift pitches for the raw jaw and the core diameter required for machining the raw jaw are calculated. A method for exchanging raw jaws in continuous machining of a variety of workpieces, characterized by performing raw jaw replacement and raw jaw lifting, and then machining the raw jaws.