KR101691040B1 - apparatus for drawing works - Google Patents

apparatus for drawing works Download PDF

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Publication number
KR101691040B1
KR101691040B1 KR1020150121633A KR20150121633A KR101691040B1 KR 101691040 B1 KR101691040 B1 KR 101691040B1 KR 1020150121633 A KR1020150121633 A KR 1020150121633A KR 20150121633 A KR20150121633 A KR 20150121633A KR 101691040 B1 KR101691040 B1 KR 101691040B1
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KR
South Korea
Prior art keywords
oil
hole
central
knockout
backing plate
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KR1020150121633A
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Korean (ko)
Inventor
김지원
Original Assignee
(주) 엠에스텍
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Priority to KR1020150121633A priority Critical patent/KR101691040B1/en
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Publication of KR101691040B1 publication Critical patent/KR101691040B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

In the drawing processing apparatus according to the present invention, knockout is connected to the upper end of the central through hole of the die so that the drawing oil is applied to the surface of the object to be machined to be placed on the oil storage groove of the die, So that the drawing oil supplied through the oil reservoir is fixed to the oil reservoir groove. The drawing processing apparatus may lower the knockout to the inside of the central through hole along the lowering drawing punch so that the drawing oil accumulated in the oil storing groove is discharged below the middle through hole have.

Description

[0001] Apparatus for drawing works [

The present invention relates to a drawing processing apparatus, and more particularly, to a drawing processing apparatus, in which oil heated to a predetermined temperature is directly supplied through a die and applied to a surface of an object to be machined, thereby increasing a drawing forming rate and reducing a shock line And to increase the uniformity of the product.

In the past, the products processed by the drawing method were not used for external parts due to the appearance of shock lines and wrinkles on the basis of work hardening due to the stress of the material during drawing plastic working, and were mainly used as internal parts. In recent years, however, there has been an increasing tendency to use drawing plastic parts in exterior parts for cost reduction and upgrading of appearance of products. To cope with this trend, it is necessary to eliminate or minimize the shock lines and wrinkles that occur during drawing plastic working.

Drawing oil supply is one of the ways to minimize the work hardening that occurs during plastic processing in order to eliminate or minimize the occurrence of shock lines and wrinkles. The oil supply and the external temperature in the drawing process are important factors that determine the formability of the product. Conventionally, in the drawing processing apparatus, a method of directly supplying oil to a workpiece is used. For example, there has been used a method of dropping oil to a processing object to be fed into a drawing processing apparatus or supplying oil to a processing object from a processing target guide apparatus.

In this method, since the oil is supplied to the object to be processed before the object to be processed is supplied, the oil applied to the surface of the object to be processed becomes insufficient as the process progresses. As a result, There is a possibility that the expected molding rate is lowered and the prevention or reduction of shock lines or wrinkles occurring on the surface of the product is less than expected and the uniformity of the product is decreased.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and apparatus for supplying oil to a surface of a workpiece by directly supplying oil heated to a predetermined temperature through a die to increase the draw- And to provide a drawing processing apparatus capable of producing or manufacturing a part having a beautiful appearance by increasing the uniformity.

The drawing processing apparatus according to the present invention includes: a drawing punch for reciprocating up and down; A die including a central through hole corresponding to the drawing punch, an oil storage groove formed surrounding the central through hole, and an inner oil path; An oil supply device for supplying drawing oil to the oil reservoir through the internal oil path before the object to be processed is placed on the oil reservoir in the preparing step; And knockout.

Wherein the knockout is located inside the central through hole and is connected to the upper end of the central through hole so as to apply drawing oil to the surface of the object to be processed which is to be placed on the oil storage groove, The drawing oil being supplied through the center hole of the oil storage groove to be formed in the oil storage groove so that the drawing oil accumulated in the oil storage groove is discharged below the center through hole, And when the drawing punch is elevated, it can return to a position corresponding to the preparation for punching by elasticity.

In addition, the oil storage ring may be formed deeper than the oil storage groove along the edge of the central through hole by at least one of the edge of the central through hole and the edge of the upper end of the knockout. have.

The inner oil path is connected to a plurality of oil supply holes formed in the bottom of the oil storage groove, and the positions of the plurality of oil supply holes may be symmetrical depending on the shape of the central through hole.

The portion of the internal oil path adjacent to the oil supply hole may have a slope inclined toward the center through hole so that the drawing oil is directionally supplied to the center through hole.

A portion of the upper end of the central through hole connected to the knockout is wider than a portion of the upper end of the central through hole adjacent to the knockout and a lower portion of the central through hole is connected to the knockout, The diameter may gradually increase.

The die may be provided on a backing plate. Wherein the knockout passes through the through hole of the backing plate and is positioned within the central through hole and is hooked by the backing plate, one side lower end of the knockout is connected to the through hole of the backing plate, And a groove for discharging the drawing oil through the gap between the through hole of the backing plate may be provided at the lower end. Here, the knockout is temporarily stopped by the backing plate. The diameter of the lower end of the knockout is larger than the inner diameter of the through hole of the backing plate, so that the lower end of the knockout is elastically supported by the elastic means, As shown in FIG.

At least a part of a portion of the backing plate corresponding to the central through hole of the die may be inclined in the through-hole direction of the backing plate for easy discharge of the drawing oil.

The drawing processing apparatus according to the present invention can provide the effect of increasing the drawing forming rate by directly supplying the oil heated to a predetermined temperature through the die and applying the oil to the surface of the object to be processed.

The drawing processing apparatus according to the present invention can provide the effect of reducing the shock line occurring on the product surface by directly supplying the oil heated to a predetermined temperature through the die and applying the oil to the surface of the object to be processed.

The drawing processing apparatus according to the present invention can provide the effect of increasing the uniformity of the product by directly supplying the oil heated to a predetermined temperature through the die and applying the oil to the surface of the object to be processed.

Fig. 1 is a view conceptually showing a configuration of a drawing processing apparatus according to the present invention.
2 is a top view of an example of a die of a drawing processing apparatus according to the present invention.
3 is a diagram showing an example of a method of driving a drawing processing apparatus according to the present invention.
FIG. 4 is a diagram illustrating a part of a process of driving the drawing processing apparatus shown in FIG.
Fig. 5 shows examples in which drawing oil is collected in the oil storage groove of the die of the drawing processing apparatus in the punch preparation step according to the present invention.
6 shows examples in which oil supply holes are formed in the oil storage grooves of the die of the drawing processing apparatus according to the present invention.
Figure 7 shows examples of combinations of die, knockout, and backing plates that can be implemented in a drawing processing apparatus according to the present invention.
8 is a view for explaining an example of a backing plate structure that can be implemented in a drawing processing apparatus according to the present invention.
9 is a view for explaining an example of the internal oil path shape of the die of the drawing processing apparatus according to the present invention.
Fig. 10 shows an example of a progressive machining apparatus including a drawing machining apparatus according to the present invention.

For a better understanding of the present invention, its operational advantages and features, and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings, which form a preferred embodiment of the invention, and the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

Fig. 1 is a diagram conceptually showing a configuration of a drawing processing apparatus 100 according to the present invention. 1, the drawing processing apparatus 100 includes a drawing punch 110, a die 120, an oil supply device 130, a knockout 140, an elastic means 150, And a backing plate (160). The components of the drawing processing apparatus 100 shown in Fig. 1 are not essential, so that the drawing processing apparatus 100 may have more or less components than those of the drawing processing apparatus 100 shown in Fig. Hereinafter, the components will be described in order.

The drawing punch 110 draws a workpiece while moving up and down. The die 120 includes a central through hole 121 corresponding to the drawing punch 110, an oil storage groove 121 formed by surrounding the central through hole 121, and an inner oil path 123 do. The die 120 is provided on the backing plate 160.

The central through hole 121 is a hole through which the drawing punch 110 and the object to be processed pass. As shown in FIG. 1, the knockout 140 blocks the central through-hole 121 in the preparing preparation step. The oil storage groove 122 is a space for drawing oil, and the drawing oil is supplied through an oil supply hole connected to the internal oil passage 123. For reference, the hatched portion in FIG. 1 means a space in which drawing oil can be supplied or stored.

In FIG. 1, an oil supply hole is formed at the bottom of the oil storage groove 122, but an oil supply hole may be formed at a side of the oil storage groove. On the other hand, the drawing oil supplied to the oil storage groove 122 may be supplied to the oil storage groove 122 as well as spring water.

The internal oil path 123 is formed inside the die 120 and is connected to the oil supply device 130. 1, the internal oil path 123 may be connected to the oil supply device 130 via an oil supply path provided in the backing plate 160. [

The oil supply device 130 supplies the heated drawing oil to the oil storage groove 122 through the internal oil path 123 before the object to be processed is placed on the oil storage groove 122 in the preparing step . Then, the heated drawing oil can be sufficiently applied to the surface of the object to be processed, which is moved to the oil storage groove 122 and raised.

1, the oil supply device 130 includes a tank 131 for storing drawing oil, a heater 132 for heating the tank 131, a storage tank 130 for storing drawing oil stored in the tank 131, A valve 134 for controlling the supply amount and supply amount of pumped drawing oil, and a connecting means 135 for enhancing the connectivity of the oil path of the backing plate 160 . However, the components of the oil supply device 130 shown in FIG. 1 are not essential, so that the oil supply device 130 may have more or fewer components.

The knockout 140 is located inside the central through hole and is fastened to the bottom of the backing plate 160. The knockout 140 is connected to the upper end of the central through hole 121 so as to apply drawing oil to the surface of the object to be processed to be raised in the oil storage groove 122, So that the drawing oil supplied through the oil reservoir 123 can be made high in the oil storage groove 122.

In FIG. 1, the upper portion of the die 120 and the knockout 140 are shown as separate, meaning that there is substantially a clearance between them. However, once the drawing oil is supplied, the drawing oil is difficult to pass between the top of the die 120 and the knockout 140 due to the adhesion of the drawing oil and the infiltration of the drawing oil. That is, the tolerance can be ignored in the preparing step.

However, when the knockout 140 is punched, the drawing oil poured into the oil storage groove 122 is discharged through the center through hole 121, And descends into the hole 121. When the drawing punch 110 is lifted up, the knockout 140 may return to a position corresponding to the preparation for punching due to the elasticity provided by the elastic means 150 provided below the knockout 140 . The lower end of the knockout 140 is larger than the inner diameter of the through hole of the backing plate 160 so that the knockout 140 ) Is caught by the lower end of the backing plate 160 due to the elasticity provided by the elastic means 150.

As described above, in the drawing processing apparatus 100 according to the present invention, the drawing oil heated to a predetermined temperature is directly supplied through the die 120 and applied to the surface of the object to be processed, Can provide an effect.

In addition, the drawing processing apparatus 100 according to the present invention can supply drawing oil heated to a predetermined temperature directly through the die 120 and applied to the surface of the object to be processed, thereby reducing shock lines occurring on the product surface Can provide an effect.

2 is a top view of an example of a die 120 of the drawing processing apparatus 100 according to the present invention.

A circular central through-hole 121 is formed at the center of the die 120, and a knockout 140 is positioned inside the die 120. The diameter of the central through hole 121 is larger than the diameter of the upper end. This is because unlike the upper end of the central through hole 121 through which the drawing punch 110 and the object to be machined are made, friction or interference with the workpiece and the punch is reduced in the lower portion of the central through hole 121 It is for this reason.

Inside the die 120, an internal oil path 123 is formed in consideration of the shape of a circular central through hole 121. Four oil supply holes are provided symmetrically along the shape of the central through hole 121 at the bottom of the oil storage groove 122. When the oil supply hole is formed symmetrically, the drawing oil can be uniformly supplied to the oil storage groove 122.

3 is a diagram showing an example of a driving method of the drawing processing apparatus 100 according to the present invention. FIG. 4 is a view showing a part of a process in which the driving method of the drawing processing apparatus 100 shown in FIG. 3 is performed.

1, drawing oil heated from the oil supply device 130 via the internal oil path 123 of the die 120 is supplied to the oil storage groove 122 of the die 120 (S100). Then, the object to be processed is moved and placed on the oil storage groove 122 (S110). Then, the heated drawing oil can be sufficiently applied to the surface of the object to be processed. The process so far can be called the preparatory stage.

FIG. 4 (a) shows a state in which the processes up to now have been performed. 4A, it can be seen that the object to be processed 200 is loaded on the oil storage groove 122 in a state in which the drawing oil is accumulated in the oil storage groove 122 of the die 120 . On the other hand, the drawing oil is accumulated more deeply than the oil storage groove 122 due to the oblique surface formed at the edge of the oil storage groove 122, so that even when the object to be processed is raised, Lt; / RTI > That is, in FIG. 4 (a), the double oblique portion to be processed, which is the portion to be formed by the drawing process, is continuously exposed to the drawing oil.

In a state where the drawing oil is applied to the surface of the movable object, the drawing punch 110 is lowered (S120). The drawing punch 110 and the object to be processed are passed through the central through hole 121 of the die 120 and the knockout 140 is interlocked with the lowering of the drawing punch 110 The drawing oil is discharged to the lower portion of the central through hole 121 while descending.

4 (b) shows a process in which the drawing processing apparatus 100 descends to perform a stroke. 4 (b), an object to be machined is drawn according to the descent of the drawing punch 110, drawing oil is supplied to the knockout 140 and the backing plate 160 via the central through- ) Through the grooves between the first and second plates. Thus, referring to FIG. 4 (b), it can be seen that the oil stored in the oil storage groove 122 is reduced.

Then, the control unit (not shown) of the drawing processing apparatus 100 determines whether the condition for terminating the drawing operation is satisfied (S140). If the above conditions are not satisfied (NO), the drawing processing apparatus 100 repeats steps S100 to S130, but if the above conditions are satisfied (YES), the drawing processing apparatus 100 stops drawing processing do.

5 shows examples in which the drawing oil is collected in the oil storage groove 122 of the die 120 of the drawing processing apparatus 100 in the preparing step according to the present invention.

Referring to FIG. 5 (a), it can be seen that the drawing oil is drawn deeper than the oil storage groove 122 due to the oblique surface formed at the edge of the central through hole 121 of the die 120. 2, an oil reservoir ring is formed in which the drawing oil is accumulated deeper than the oil storage groove along the edge of the central through-hole 121 in the preparing preparation step.

5 (b), not only the edge of the central through hole 121 but also the edge of the knockout 140 is formed with an oblique surface so that the width L2 thereof is equal to the width L1 of FIG. 5 (a) It can be seen that a wider oil storage ring can be formed. That is, in the drawing machining apparatus according to the present invention, it is preferable that the molding target portion to be machined is located on the oil storage rings. This is because it is ensured that the drawing oil continuously comes into contact with the substantially molded target portion.

5 (c) shows an oil storage ring formed by a round formed at the edge of the central through hole 121. FIG. 5 (d) shows the edge of the central through hole 121 and the knockout 140 The oil reservoir ring can be formed by the round formed at the edge of the oil reservoir ring. 5 (a) and 5 (b), the width of the oil storage ring can be enlarged when a round is formed at both the center through hole 121 and the edge of the knockout 140. [ same. 5 (c) and 5 (d), it is preferable that the molding target portion to be processed be located on the oil storage rings.

The circumference of the center through hole 121 of the die 120 and the circumference of the center through hole 121 are formed by the oblique surface or the round formed on at least one of the edge of the die through hole 121 and the edge of the knockout 140, An oil storage ring for continuously and sufficiently supplying the drawing oil to the object to be processed can be formed.

6 shows examples in which an oil supply hole is formed in the oil storage groove 122 of the die 120 of the drawing processing apparatus 100 according to the present invention.

Referring to FIG. 6 (a), it can be seen that the oil supply holes are symmetrically located around the circular central through hole 121. Referring to FIG. 6 (b), it can be seen that the oil supply holes are symmetrically located around the elongated central through hole 121. Thus, when the oil supply holes are symmetrically disposed along the central through-hole shape, the drawing oil can be uniformly supplied to the oil storage groove. As a result, the drawing oil can be uniformly applied to the object to be processed which is placed on the oil storage groove.

Figure 7 illustrates examples of combinations of die 120, knockout 140, and backing plate 160 that may be implemented in the drawing processing apparatus 100 according to the present invention.

7, a portion L3 connected to the knockout 140 at the upper end of one side of the central through hole 121 of the die 120 is connected to the knockout 140 at the upper end of the other through- It is wider than the connecting part. It can be seen that the diameter gradually increases from the central through hole 121 toward the knockout 140. This structure is for allowing the drawing oil to be discharged more easily through the upper end of the other side of the central through hole 121. According to another embodiment of the present invention, unlike the asymmetrical concave structure of the through hole 121 of the die 120 in FIG. 7A, the central through hole and the knockout of the die have a symmetrical concave structure It is possible.

7 (a), the lower end of one side of the knockout 140 is connected to the through hole of the backing plate 160, and the other end of the knockout 140 is connected to the lower end of the backing plate 160 And a groove 141 for separating the through hole from the through hole is formed. This separation is for easy discharge of the drawing oil.

7B, the knockout 140 is not provided with a groove for discharging the drawing oil, but the through hole of the backing plate 160 is formed larger than the knockout 140 And the drawing oil is easily discharged.

8 is a view for explaining an example of a structure of a backing plate 160 that can be implemented in the drawing processing apparatus 100 according to the present invention.

8, at least a portion of the backing plate 160 corresponding to the central through hole 121 of the die 121 is formed to penetrate through the backing plate 160 for easy discharge of the drawing oil. It can be seen that it is inclined in the ball direction. This inclination can be determined based on the amount of drawing oil to be discharged in the viscosity drawing oil of the drawing oil and the like.

8 (a), the drawing oil remaining in the central through hole 121 can be easily gathered at the center of the through hole of the backing plate 160 by the preceding drawing processes, and in particular, the knockout 140) and the backing plate (160). 8 (b), the drawing oil remaining in the central through hole 121 and the drawing oil to be discharged by the drawing process are easily gathered at the center of the through hole of the backing plate 160, As shown in FIG.

9 is a view for explaining an example of the form of the internal oil path 123 of the die 120 of the drawing processing apparatus 100 according to the present invention.

Referring to Figure 9, a portion of the die 120 adjacent the oil supply holes 123-1 and 123-2 in the internal oil path 123 is configured such that drawing oil is directed to the central through- d2 in the direction of the central through-hole 121. [0064] As shown in FIG. This is a structure for intensively supplying the drawing oil to the molding target portion of the object to be processed since the molding target portion in the drawing object is generally located near the central through hole 121.

Fig. 10 shows an example of a progressive machining apparatus 100 'including a drawing machining apparatus 100' according to the present invention.

The progressive press working apparatus 100 'of FIG. 10 includes a plurality of slave apparatuses 100-1 through 100-5 capable of directly supplying heated oil to a workpiece through a die, such as the drawing apparatus 100 described above. ). The plurality of slave units 100-1 to 100-5 may be a drawing processing unit or an apparatus for performing other processing.

Therefore, in each machining step performed in the progressive machining apparatus 100 ', it can be uniformly provided to the object of the heated oil, so that the machining can be easily performed in each machining step (that is, ), It is possible to reduce the occurrence of shock lines on the surface of the object to be machined which may occur in each machining step.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

100: Drawing machine 110: Drawing punch
120: die 130: oil feeder
140: knockout 150: elastic means
160: backing plate

Claims (7)

A drawing punch reciprocating up and down;
A die including a central through hole corresponding to the drawing punch, an oil storage groove formed surrounding the central through hole, and an inner oil path;
An oil supply device for supplying drawing oil to the oil reservoir through the internal oil passage before the object to be processed is placed on the oil reservoir in the preparing step;
And a second through hole located inside the central through hole,
The drawing oil supplied through the inner oil path is connected to the upper end of the central through hole so that the drawing oil is applied to the surface of the object to be processed to be put on the oil storage groove, So,
The drawing oil is lowered into the central through hole along the lowering drawing punch so that the drawing oil accumulated in the oil storage groove is discharged below the central through hole, and when the drawing punch is elevated, A knockout for returning to a position corresponding to the step; And
And elastic means provided below the knockout for providing the elasticity. The method according to claim 1,
By a round formed on at least one of the edge of the central through hole and the edge of the upper end of the knockout,
And an oil storage ring is formed deeper than the oil storage groove along an edge of the central through hole. The internal combustion engine according to claim 1,
A plurality of oil supply holes formed in the bottom of the oil storage groove,
The position of the plurality of oil supply holes
Wherein the central through hole is symmetrical with respect to the shape of the central through hole. The internal combustion engine according to claim 3, wherein a portion of the internal oil passage adjacent to the oil supply hole
Wherein the drawing oil has an inclination inclined toward the central through hole so that the drawing oil is supplied with a direction toward the central through hole. The method according to claim 1,
Wherein a portion of the upper end of the central through hole connected to the knockout is wider than a portion of the upper end of the central through hole adjacent to the knockout,
And the diameter of the central through hole gradually increases below the portion connected to the knockout. 6. The method of claim 5,
Is provided on a backing plate,
The knock-
And a lower end portion of the lower plate is inserted into the central through hole through the through hole of the backing plate so that the lower end portion is larger than the inner diameter of the through hole of the backing plate, Taking,
Wherein a bottom of one side of the knockout is connected to a through hole of the backing plate and a groove for discharging the drawing oil is provided at a lower side of the other side of the knockout through a distance from the through hole of the backing plate. . 7. The apparatus of claim 6, wherein at least a portion of a portion of the backing plate corresponding to the central through-
And is tilted in the through-hole direction of the backing plate for easy discharge of the drawing oil.
KR1020150121633A 2015-08-28 2015-08-28 apparatus for drawing works KR101691040B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150121633A KR101691040B1 (en) 2015-08-28 2015-08-28 apparatus for drawing works

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050101312A (en) * 2002-12-03 2005-10-21 티센크루프 슈타알 악티엔게젤샤프트 Lubricant coated sheet metal with improved deformation properties

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050101312A (en) * 2002-12-03 2005-10-21 티센크루프 슈타알 악티엔게젤샤프트 Lubricant coated sheet metal with improved deformation properties

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