JP3368342B2 - Mold guide mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an almost vertical slot.
-Automatic and high-precision machining of taper
The present invention relates to a mold guiding mechanism using a processing method. [0002] 2. Description of the Related Art When a sheet metal is pressed, a metal mold is usually used.
The clearance is set with the shape of the upper mold and the lower mold matched.
The thickness of the sheet metal is properly secured between the upper and lower molds.
It is necessary to be. If the sheet metal is plastically deformed,
When the shape is sharp,
In the pan-shaped part, it is easy to wrinkle when pressing,
Phenomena that are easily broken or surface distortion is easily generated occur. This
To keep the shape intentionally to prevent phenomena like
Provide a clearance for escape in the range where
It is necessary. And the distance between the upper and lower mold of this mold is
It affects the finished condition of the product and is extremely
It is an important factor. [0003] For this purpose, the upper and lower molds of the mold are relatively moved.
It is important to guide them accurately when moving them. Plan
The inner means is a guide structure with pins and guide holes,
In general, a guide structure using a flat guide surface is used. This
The guide structure with pins and guide holes is relatively small and
It is used for press work that does not take place. Also plane
The guide structure of the guide surface is for large and powerful press working.
Most press dies have this structure.
You. Then, this flat guide surface is usually made of gold as shown in FIG.
To the frame or die holder to attach the die,
It is formed integrally. Alternatively, as shown in FIG.
It is formed integrally with the mold body. And in the upper mold
Guide a punch directly or plan a blank holder
Is within. [0004] A die holder which is a mold and a frame is generally
Casting structure, dimensions as large as 1-10m, and complex
Many have various shapes. The guide surface formed on the die holder
As shown in FIG. 9, the outer side faces the entire die holder.
When facing not only the facing surface but also the inward direction
May be located in very narrow areas.
Therefore, it is difficult to process the guide surface. Same for the mold body
It is. Machining of these places usually requires machining centers
Is mounted on the spindle head of the machining center.
In the case of the standard attachment 41, the space between
Not work due to interference with the mold body as seen in
There are many. Therefore, special attachment 42 must be manufactured and used.
But it is difficult to machine all guideways
It is. Therefore, conventionally, an elongated end mill has been
Processing was performed by attaching to the spindle of the machining center.
At the time of construction, the cutting force covers almost the entire length of the end mill blade.
The end mill escapes from the workpiece and
I could not do it. In addition, run-out of the end mill blade, blade
The undulation of the lead is transferred to the machined surface,
I couldn't get a face. Because of this after processing
Rework the machined surface and attach a slide plate
Guide sliding surface. And correct dimensional accuracy
Rounding up the slide plate to perform
Of the machined surface due to sand milling
The clearance between the upper die and the sliding surface was secured. [0006] Still, thousands and tens of thousands of press working are repeated.
The sliding surface of the slide plate wears while
Needs to be measured and corrected at regular intervals
was there. The frame is very large and heavy.
Therefore, rework adjustments required a lot of time and effort.
Originally, the slide plate was modified by rounding up
So that the upper and lower molds can be matched
Is difficult to reproduce, and when removing and reassembling,
A fix was needed. [0007] These shortcomings of machining with elongated end mills.
Recently, as shown in FIG. 14,Butting
DoBy toolThrustProcessing has begun. Only
ShinoThrustProcessing is also described in JP-A-5-92347.
The finishing allowance t to the final workpiece shape
Is provided, and the secondary processing contour line b
Then, the primary processing contour line d is calculated. And separate secondary wheels
Find the center shape line c with the tool radius offset from the contour line b
I will. Next, from each point obtained by equally dividing the primary processing contour d
Each machining point C1 on the center shape line c separated by the tool radius R
1, C12, C13... For each of these machining points
For workThrustProcessing is performed. in this way
Perform many calculations on each machined surface
Had to be programmed. [0008] [Problems to be solved by the invention] The proposal described in the conventional technology
InsidemechanismSimply attaches the slide plate to the guide surface
The precision of the machined surface itself is poor and
There was a problem that had to be done. Also slide
Fix and replace the plate as it wears out when used
There was a problem that must be done. The present invention addresses such problems with the prior art.
Was considered in light of theIs gold
Improves the machining accuracy of the machining surface for guiding the mold, and
Guide that facilitates pitch adjustment between guide sliding surfacesmechanismTo
provide. [0010] [0011] [0012][Means for solving the problem] ]To achieve the above purpose
ToThe guide mechanism of the mold of the present invention is a vertical guide having a vertical wall shape.
For the guide surface on a mold body or mold mounting frame
Is formed by punching, and has the same slope as this slope.
The other side has the same vertical surface as the guide surface.
The wear plate that has become the surface is sloped on the guide slope.
Combine competitors by making surface contact in opposite directions, and wear
A mechanism for finely moving the plate up and down is provided.
A receiving shelf is formed below the slope, and the bottom of the wear plate
Insert the wedge plate so that it can be adjusted
Vertical movement of the wear plate by moving the rate up and down
To be able to fine-tune the gap between the surface and the guide surface of the mating die
What was done. [0013] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
It will be explained based on this. Standing machining center not shown
At the tip of the spindlePunchingInstall tool 2 and rotate the spindle
1a, 1b while horizontal on the spindle head (X axis)
While performing simultaneous two-axis control in the vertical and vertical (Z-axis) directions
The inclined surface (slow taper) 1 is processed.Thrust
ProcessEach cutting tool of tool 2 can be used for slant processing with a loose tip
Using the shape of R or sharp edge,
Only the tip of the cutting tool comes into contact with the work. FIG. 2 shows a control diagram of the tool path at this time.
It will be explained first. The NC program recognition circuit 3 is input
Position data (XA, YA, Z
A), position data (XA, Y) of the first machining stroke end
B, ZB), position data (XB, YB,
ZB), pick amount data (PPT), tool from workpiece
Release data (PGP), tool diameter data (PD),
Tool length data (PL) Spindle speed (PS), Spindle feed speed
Read the degree (PF) and others. The machining surface definition circuit 4 recognizes an NC program.
Position data of the first processing start point from circuit 3, first processing
Stroke end position data, all machining end point position data
In response to this, the processing inclined surface is determined. Work length (A) calculation times
On the road 5, the position data in the X-axis direction is
Then, the length A of the work in the X-axis direction is calculated. Pick times
In the number setting circuit 6, pick from the NC program recognition circuit 3.
Receiving the quantity data (PPT) and calculating the work length (A)
Receives work length dimension data A from road 5 and actually implements
The number of picks A ÷ PPT is calculated. In the tool diameter / tool length data storage circuit 7, NC
Receives tool diameter and tool length data from program recognition circuit 3.
Stored. Processing in the tool offset calculation circuit 8
Receives the data of the machined slope from the surface definition circuit 4 and
Receiving tool data from the diameter / tool length data storage circuit 7
The tool offset amount (tool radius) is calculated. When picking
In the relief amount calculation circuit 9, the machining inclination is determined from the machining surface definition circuit 4.
Receiving surface data and from tool offset calculation circuit 8
The amount of release of the tool is calculated based on the offset amount. In the tool path setting circuit 10, an NC program
The position data of the first machining start point from the recognition circuit 3
Machining stroke end position data, all machining end point position data
Data from the tool offset calculation circuit 8
Receiving the set amount data and processing from the escape amount calculation circuit 9
Receiving amount data of the tool and further setting the number of picking times 6
The number of picks from
From the start point of the first machining stroke offset to
Set the program for The program interpretation circuit 11 sets a tool path.
Receiving the output from the circuit 10 for each machining stroke
Interpret the machining program. NC program control circuit 1
2 receives one output from the program interpretation circuit 11
Command a machining program for each machining stroke. This machine
The designation circuit 13 outputs the output of the NC program control circuit 12
Then, the machine is instructed to execute the machining cycle. [0019] The program command determines the moving path of the tool.
Information used to automatically set the program
The data is the cutting feed approach in the Z-axis direction of the tool.
Position data (R1), position data of the first machining start point of the tool
Data, end position data of the lower end of the first machining stroke,
End position data of the lower end of the final machining stroke, machining surface of the tool
Release data [PGP], transfer of the tool in the lateral direction
Dynamic pick amount data [PPT], spindle speed data [P
S], cutting feed speed data [P
F], tool length correction number (value) data [PH], tool diameter
Correction number (value) data [PD], tool offset position
Data indicating whether is present on the left or right of the machined surface
[PL1 or PL2]. Using the above data,
Dynamically calculate and set the tool path programming. Prior to the description, coordinates indicating the moving direction of the tool
Is defined. The first cutting start position where the tool is offset
In the explanation, it is assumed that the processing origin [X1, Y1, Z1]
The direction in which the tool descends is the + Z axis direction, and the direction in which the tool rises is -Z.
In the axial direction, the direction in which the tool approaches the workpiece is + Y axis direction, away
Direction−Pick moves in the Y-axis direction, rightward in the figure.
Direction is defined as + X-axis direction, and the opposite direction is defined as -X-axis direction. Machine
The origin is X0, Y0, Z0. [0021] 【Example】 Part 1. The corner at the upper end of the workpiece processing part has an acute slow taper
The tool locus will be described with reference to FIGS. 3A and 3B.
The tool is located at the first machining stroke start position (a) [X1, Y
1, Z1] to two axes of Y axis (+ direction) and Z axis (+ direction)
End of the first machining stroke while cutting by combined movement of control
Move and position at position (b) [X1, Y2, Z2].
Next, when the tool is lifted,
Release position (c) in the Y-axis direction away from the work [X1,
Y3, Z2]. Next, the tool moves to the next
Pick that moves laterally in the X-axis (+ direction) to start the row
Position at the amount movement position (d) [X2, Y3, Z2]
You. Next, the tool is moved in the Z-axis (-
) And the height of the first machining stroke start position
(E) [X2, Y3, Z1]. Next, the tool is
2nd straw (Y-axis (+ direction)) close to the workpiece for construction
Start position (f) [X2, Y1, Z1]
End the cycle. In this way, the machining cycle is sequentially changed to the second
Execute the machining stroke and the third machining stroke to
After the X-axis movement and the final machining stroke is completed, the tool is released.
From [Xn, Y2, Z2] to the Z-axis (-direction),
The machining cycle ends when the tool rising end position is reached. This
Slow taper machining is performed as
You. The processing cycle including the preparation operation is shown in the flowchart.
As shown in FIG. [0022] [Embodiment 2] The corner at the lower end of the work
The tool path will be described with reference to FIG. Engineering
Tool first stroke start position (g) [X1, Y1,
Z1], the tool is moved in the + Z axis direction and the −Y axis direction in the XZ plane.
To the end of the first machining stroke
(H) Up to [X1, Y2, Z2]ThrustPerform machining cutting
Let Then move the tool away from the workpiece-release in the Y-axis direction
(X), and move to (X1, Y3, Z2). Next
The tool in the + X-axis direction by the pick amount in the horizontal position (nu) [X
2, Y3, Z2]. Then the horizontal position (nu)
From the first machining stroke of the tool upward in the -Z-axis direction
Height position of the start position of the row (L) [X2, Y3, Z1]
Up to Further, from the position (L), the second processing straw
+ Y to the tool start position (ヲ) [X2, Y1, Z1]
Approach the work in the axial direction. This makes one cycle of the tool
Tool is completed, and then the tool is sequentially moved in the X-axis direction (+ direction)
Then, the slow taper surface is processed. [0023] [Embodiment 3] The top corner of the workpiece is sharp
The tool path will be described based on FIG. 5 showing the low taper.
The tool is the first downward machining stroke start position (W) [X
[1, Y1, Z1] to Z-axis direction (+ direction)
End position of the first downward machining stroke after descending by combined movement
(X), (Y2, Z2). Then the first lower
From the end of the machining stroke end (f) in the X-axis direction (+
Pick amount set in the direction) (or 1 /
2) Move (Yo) [X2, Y2, Z2]
You. Next, two-axis control of Z-axis (-direction) and Y-axis (-direction)
Ascending in the -Z-axis direction due to combined movement First upward machining stroke
End end position (ta) [X2, Y1, Z1]
You. Next, in the X-axis direction (+ direction),
The half downward stroke and the second downward machining stroke start position
Machining site for positioning at (X3, Y1, Z1)
Do the kuru. Thereafter, this machining cycle is sequentially performed in the X-axis direction.
U. In this case, machining is performed even when
Cutting remarks can be made fine by reciprocating cutting, and
Improve step by step. Note that reducing the pick amount to 1/2 is
This corresponds to a case where the lock amount is reduced. [0024] 【Example】 Part 4. Slow taper with sharp acute corner at the bottom of the workpiece
6 will be described with reference to FIG. 1st downward
Is the processing stroke start position (SO) [X1, Y1, Z1]
-Axis control in Z-axis direction (+ direction) and Y-axis direction (-direction)
End of the first downward descent stroke by descending due to the composite movement of
Move to position (X) [X1, Y2, Z2]. This position
(P), the pick amount set in the X-axis direction (+ direction)
Or 1/2 of the set pick amount) and move to (n) [X2, Y
2, Z2]. Next, the Z-axis direction (-direction)
-Z-axis direction by combined movement of two-axis control in Y-axis direction (+ direction)
Ascending first upward machining stroke end end position (n) [X
[2, Y1, Z1]. Next, in the X-axis direction (+ direction
Pick amount (or 1 / of the set pick amount)
2) Move to the second downward machining stroke start position (LA)
A machining cycle for positioning at [X3, Y1, Z1] is performed.
U. Thereafter, this processing cycle is sequentially performed in the X-axis direction. this
In this case, the cutting streak becomes finer by reciprocating cutting. [0025] 【Example】 Part 5. Slow taper with sharp corner at the top of the workpiece
7 will be described with reference to FIG. Tool 2
1 processing stroke start position (Y) [X1, Y1, Z1]
To the + Z-axis direction by Z-axis control from the first machining stroke
Move to the end position (X) [X1, Y2, Z2]. Next
Now, without changing the position in the X-axis direction,
Z-axis direction, -Y-axis direction position (q) [X1, Y3, Z
1)). This rise causes the tool to move
Difference between Y3 and Y1-
Simultaneously to raise the tool in the Z-axis direction-the amount of Z2-Z1
Axis control is performed. At this time, the position in the X-axis direction
Tool is already in the first machining stroke
Separates the machined YZ plane from the workpiece in the -Y axis direction.
Move in the direction of
There is no interference between the tool and the workpiece. Then, in the + X-axis direction of the pick amount in the XY plane
At the same time as the tool moves closer to the workpiece in the + Y-axis direction.
The tool is processed in the second machining by performing the shift movement by simultaneous two-axis control.
Stroke start position (F) [X2, Y1, Z1]
Let me. In this cycle, tool movement is performed sequentially in the X axis + direction
This completes the slow taper processing.
You. In this method, simultaneous two-axis control is used twice except during machining.
And move the tool to the first machining stroke start position.
From (ya) to (ya) → (ma), (ma) → (ke), (ke) →
(F) and move in three directions to start the second machining stroke
(F) to move all the necessary for processing
This significantly reduces the time. [0027] [Embodiment 6] The slot at the bottom corner of the workpiece is sharp
A description will be given based on FIG. The tool is
From the stroke start position (U) [X1, Y1, Z1]
+ Z axis directionWhen-First machining by descending with two-axis control in the Y-axis direction
Stroke end position (D) [X1, Y2, Z2] is reached
I do. Then, work without changing the position in the X-axis direction and the Y-axis direction.
The tool in the -Z axis direction (te) [X1, Y2, Z1]
To raise. This rise raises the tool from the workpiece to Y2 and Y1.
This means that the difference has been retreated. Therefore, it is very easy to control this increase.
Simply. Then, in the XY plane, in the + X-axis direction of the pick amount
Tool moves closer to the workpiece in the + Y-axis direction at the same time
Move the tool to the 2nd machining stroke with simultaneous 2-axis control.
Move to the start position (A) [X2, Y1, Z1]. this
By performing the tool machining cycle sequentially in the X-axis direction,
This is to complete the low taper processing. This method
The tool is moved from the first machining stroke start position (U) to the second machining stroke.
Move in three directions to the trooke start position (A)
And the number of simultaneous dual-axis controls has been reduced.
Control and control the total time required for construction
Can be easily performed. [0029] FIG. 10 is a sectional view of a mold, and FIG.
FIG. 11 is an enlarged cross-sectional view of the guide unit and FIG. 1 is a front view of the guide unit.
Based on 2ThrustThe processed guide surface will be described. 21 is
The lower mold of the mold, 22 is a guide incorporated in the lower mold.
Mechanism. Reference numeral 23 denotes an upper mold, and the guide mechanism 22
It is guided and moved up and down to perform press working. Plan
The inner mechanism 22 is located above the lower mold 21 as shown in FIGS.
Bracket fixed to the surface with the end overhanging
A socket 24. Lower mold at the bottom of the bracket 24
21 has a guide inclined surface 25 as described above.ThrustHigh by processing
The precision has been improved. The same slope as this slope 25
Two inclined surfaces 25, 26
And make surface contact by combining them in the opposite direction
The wear plate 28 is tapered (vertical direction)
The lower bolt 21 is fixed to the lower
Is attached. This rear surface 27 is used as a vertical guide surface.
To use. The bracket 24 has two types of bolts 29 and 31.
Is installed. One bolt 29 is screwed into the bracket.
And the tip of the bolt 29 is the upper end face of the wear plate 28
Acts to push down the wear plate 28 in contact with
Then, the position of the bolt 29 is blocked by the lock nut 30.
It is fixed to the racket 24. The other bolt 31 is
And is screwed into the wear plate 28
ing. A nut 32 is attached to the bolt 31,
Turning the nut 32 raises the wear plate 28 upward.
To work up. And these two kinds
The wear plate 28 is moved by the action of the bolts 29 and 31.
It can be brought to the optimal position. The wear plate 28 is fixed at the optimum position.
It is fixed to the inclined surface 25 of the lower mold 21 by the fixed bolt 33.
You. The lower mold 21 has a receiving shelf 34 below the inclined surface 25.
The lower end surface of the wear plate 28 and the receiving shelf
The wedge plate 35 can be adjusted between the part 34 and the part 34
Insert and wear plate by vibration during press working
28 is prevented from gradually lowering. in this way
Up and down of the wear plate 28 using the inclined surfaces 25 and 26
By performing the position adjustment, the lead in the lower mold 21 of the mold is adjusted.
Horizontal direction of the back surface 27 of the wear plate 28 serving as a direct guide surface
The direction position is finely adjusted. In the above description, the X axis, the Y axis and their +
However, the present invention is not limited to this.
And inclined surfaces that are not parallel to any of the X, Y, and Z axes.
However, pick movement parallel to the slope and perpendicular to the Z axis
Direction, the direction of pick movement and the direction perpendicular to the tool axis
Good. In addition, at least two of the second to fourth steps are performed.
Perform two processes at the same time, or from the third process to the fifth process
Performing at least two steps simultaneously, a third step and
Reverse the order of the fourth step or these and the second step
Order of each process, such as reversing the order of the process or the fifth process
Can be arbitrarily changed. Also, almost perpendicular to the pick
Omitting the movement in the escape direction
To the top by moving to the machining stroke start point
Processing may be performed. [0033] Since the present invention is configured as described above,
The following effects are obtained. [0034] Plunging throw of mold guide surface
Combine taper and wear plate
Allows fine position adjustment in the horizontal direction while keeping the back vertical
The phase matching of the upper and lower dies has been adjusted
It is not necessary and can be performed easily.
It was able to appear. Also, a wedge plate is provided on the underside of the wear plate.
The vibration caused by the press working.
The air plate does not slip down and always wear
The rear vertical surface of the seat can be kept in the desired position
You.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a machining state of an inclined surface by a tool for punching, where a is an obtuse angle at the upper end and b is an acute angle at the upper end. FIG. 2 is a control block diagram for executing processing according to the embodiment. 3A and 3B are diagrams illustrating a first example of a tool path, in which a is a view of a tool path, and b is a view illustrating a machining surface state of a slow taper; FIG. 4 is a diagram of a second example of the tool path. FIG. 5 is a diagram of a third example of the tool path. FIG. 6 is a view of Example 4 of the tool path. FIG. 7 is a view of Embodiment 5 of the tool path. FIG. 8 is a view of a sixth example of the tool path. FIG. 9 is a view showing a guide surface of a mold frame. FIG. 10 is a combination diagram of an upper mold and a lower mold of a mold. FIG. 11 is an enlarged sectional view of a guide mechanism. FIG. 12 is an enlarged front view of a guide mechanism. FIG. 13 is a diagram showing a processing state of a conventional guide surface. FIG. 14 is a diagram showing a state of punching a vertical surface. FIG. 15 is a view showing a processing flowchart of Example 1; [Description of Signs] 1 Inclined surface 2 Tool for punching 25 Inclined surface of mold body 26 Inclined surface of wear plate 28 Wear plate 29, 31 Position adjustment bolt 35 of wear plate 35 Wedge plate

Continuation of the front page (56) References JP-A-8-39321 (JP, A) JP-A-8-243727 (JP, A) JP-A-64-83325 (JP, A) JP-A-62-77631 (JP, A) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21D 37/10 B23Q 15/00 B23C 3/00 G05B 19/4093

Claims (1)

(1) In a mold having a vertical guide surface in the shape of an upright wall, an inclined surface for the guide surface is formed by punching a mold body or a mold mounting frame body. A wear plate having an inclined surface having the same gradient as this inclined surface on one side and having the other surface being the same vertical surface as the guide surface is brought into surface contact with the inclined surface for guiding in opposite directions. A mechanism for vertically moving the wear plate up and down is further provided, a receiving shelf portion is formed below the inclined surface for the guide surface, and a wedge plate is inserted between the lower surface of the wear plate and the wear plate so as to be adjustable, so that the wear plate can be adjusted. The guide mechanism for a mold, wherein the gap between the vertical surface of the wear plate and the guide surface of the counterpart mold can be finely adjusted by the vertical adjustment movement of the mold.