JP2007021577A - Deep drawn sink and deep drawing process - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance drainability by providing unevenness continuously formed on the inner side walls, corners and bottom of a sink and lessening a hydrodynamic resistance coefficient of the unevenness and increasing the capillary force. <P>SOLUTION: The invented deep drawing process uses a die 101, a punch 102 and a holder 103. The deep drawing of a plate 1 is achieved by varying the cushion pressure of the holder 103 according to the progress of the deep drawing and by adjusting the three-dimensional spreading degree of the plate 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sink structure and a deep drawing method in which a plate material having an uneven surface is deep drawn by a bathtub or a sink.

Known examples relating to the present invention include the following.
Known Example (1) Patent Document: JP-A 2004-316195
Known Example (2) Patent Document: JP-A-5-71266
Known Example (3) Patent Document: JP-A-11-105191
Known Example (4) Patent Document: Japanese Patent Application Laid-Open No. 2004-137796
Known Example (5) Patent Document: Japanese Patent Laid-Open No. 2001-246433
Known Example (6) Patent Document: Utility Model No. 2516296

  The above-mentioned known examples are viewed from the viewpoint of reducing the generation of scale by improving the drainability of the sink and reducing the adhesion of water droplets. Known example (1) provides a configuration in which unevenness is processed only on the side wall of the sink, and does not disclose the case where the unevenness is continuously processed on the side wall, corner, and bottom plate of the sink. It is not disclosed to create a suitable uneven shape in the process of drawing. In addition, the known examples (2) and (6) provide a sink structure using a plate with unevenness on the top plate of the sink, but with respect to the sink with side walls, corners and bottom plate being processed with unevenness. Not disclosed. Moreover, although the known example (3) discloses a method of performing uneven processing while forming a multilayer film on the surface of the plate material by a printing method, it is not mechanically processed by pressing or the like on the surface of the plate material. The manufacturing method and configuration of the aperture sink are not disclosed. In addition, known examples (4) and (5) disclose a manufacturing method in which the surface of a plate material is mechanically processed by pressing or the like, but a method for manufacturing a deep drawing sink and the configuration of the sink are disclosed. Not. The present invention provides a manufacturing method that can be deep-drawn so as to have irregularities continuously on the side wall, corners, and bottom surface of the sink, and the shape and surface state of the irregularities on the surface of the plate material. The main point is to make the structure in the process of deep drawing by punch and die. This allows water to move continuously from the side walls, corners, and bottom to the drainage holes, improving water drainage and reducing the generation of scales, and providing irregularities to prevent scratches. Even if it is attached, it is to provide a thing that makes the scratches inconspicuous and improves the aesthetics so that only the convex surface is marked.

  When drainage is a problem at the sink, there are two main types. First, the sink drain hole is closed and the sink is fully filled to collect water. After the washing operation is completed, the drain hole is opened and the sink is in a continuous flow of water as when draining. This is the case of whether the inner surface drainage and water adhesion are good or bad. Second, when the drain hole is open and not full, the faucet is opened and the water is poured and water is applied to the side wall. This is the side wall, corner, and bottom plate. It is a case where it is said whether the drainage property and the water adhesion property are good or bad when the water discontinuously moves to the drainage hole. In either case, it is important that the uneven structure of the inner surface of the sink has a small resistance coefficient hydrodynamically. It is also important that the water droplets adhering to the inner surface of the sink are easily subjected to the capillary action of the concavo-convex portion and easily moved to the drainage hole by the capillary action. Further, in order to further enhance the effect of the present invention, the concavo-convex portion is continuously provided on the peripheral edge and the top plate connected to the side wall.

From this point of view, the inventor conducted extensive research and completed the following invention.
(1) On the inner surface of the sink, a large number of irregularities (also referred to as embossing) are provided continuously over at least the sidewalls, corners, and bottom plate of the sink, and each irregularity structure is drainable. To a good structure. Specifically, the uneven structure is a streamlined shape in the flow direction of fluid (water, etc.) to reduce the resistance coefficient of the fluid and enhance the effect of capillary action. The main point is to make a deep drawing process.
(2) In the streamline processing of the unevenness, the side wall portion far from the drain hole of the sink is regarded as important. In particular, the uneven shape of the side wall portion is processed into a streamlined structure and a structure that enhances the capillary action. To facilitate fluid flow.
(3) In addition to the four flat side walls of the sink inner surface, the four corner side walls on the diagonal when viewed from the upper surface of the sink are further located geometrically far from the drainage hole, resulting in poor drainage. . For this reason, in addition to the structure of the irregularities on each side wall of the corner, which is streamlined and increases the capillary force as described in (2), the arrangement pattern in which the irregularities are viewed as a whole with respect to the drain holes is used. Then, it is processed into a convex arc shape. Moreover, the space | interval of the convex part of this part is narrowed with respect to another surface, and water drainage property is reinforced. If it does in this way, the water which flows in the corner part, or the water droplet which has adhered will become easy to unite and gather as it moves to the lower part, and moving speed will increase and water drainage nature will increase. Moreover, the said arrangement pattern contributes also to the improvement of aesthetics.

A method for realizing such a structure in the process of deep drawing will be described in detail below. (1) When deep drawing is performed while pressing the uneven plate material into the die with a punch, the peripheral edge of the plate material is pressed against the die. The cushion pressure of the holder for setting is made higher than in the case of the smooth plate material, and increases as the degree of deep drawing advances and approaches the end point. The method of increase may be stepwise or continuous. The plate material is deep drawn while moving three-dimensionally between the die and the punch, but the plate material has an extended part and a contracted part. Depending on the adjustment of this cushion pressure, the sink material Since the shape of the concavo-convex on the inner surface and the arrangement pattern of the concavo-convex change, the stepwise adjustment of the cushion pressure with respect to time (depending on the progress of processing) and the degree thereof are important.
(2) The cushion pressure in the case of the uneven plate material of the present invention is in the range of 1, 1 to 2, 5 times the case of processing a smooth plate material having the same thickness.
(3) At the time of deep drawing, the lubricating oil applied to the plate material is one added with at least hydrocarbon oil, and the initial temperature when applied to the plate material is adjusted to a range of 10 ° C to 30 ° C.
(4) The thinning ratio of the planar side wall portion is in the range of 20% to 50% with respect to the peripheral edge or top plate having a low processing rate, and that of the four corner side walls is 20% to 60% with respect to the bottom plate having a low processing rate. The structure is adjusted to the% range.

  According to the structure of the deep drawing sink of the present invention, water can easily flow continuously from the plane of the side wall 4 and the four corner side walls through the bottom plate to the drainage hole, so that water drainage is improved and the drainage hole is improved from the outside. Easily drained. This reduces the occurrence of scale. In addition, since the arrangement pattern of the irregularities on the inner surfaces of the four corners when viewed from the top surface of the sink is a circular arc that is convex with respect to the drainage holes, the drainage of the corners is good and the entire irregularities of the corners are also improved. The impression and aesthetics of a typical striped pattern are remarkably good. Also, the scratches are not noticeable as a whole.

The embodiment of the present invention will be specifically described with reference to FIGS.
1 to 4 show process drawings of deep drawing. FIG. 1 is a first process diagram of deep drawing, and the initial setting was made by placing the plate 1 on the upper surface of the punch 102 and the holder 103 arranged on the same surface, and contacting the end surface of the die 101 on the opposite side. It shows the state. Lubricating oil is applied to the front side and the back side of the plate 1. The stock solution of the lubricating oil is adjusted to a range of 10 ° C. to 30 ° C. by dissolving in water.

  FIG. 2 is a second process diagram. First, pressure is applied to the plate material 1 from the holder 103 to the die 101 to press the plate material 1. This pressure is called cushion pressure, and it is important to change it according to the thickness, strength, slip coefficient, type of lubricant, surface coating / thin film, and creation of the desired surface shape. It is. After completion of such preparation, pressure is applied to the plate 1 while pushing the punch 102 upward, and the plate 1 is pushed into the space of the die 101 and deformed. At this time, the peripheral edge 5 of the plate 1 existing between the punch 102 and the die 101 starts to move inwardly. This second process is also called a draw process.

  FIG. 3 is a third process diagram and shows a state where the process of FIG. 2 is further continued and the punch 102 is pushed to the end point of the die 101 and deep drawing is performed. In this step, the peripheral edge 5 of the plate 1 existing between the punch 102 and the die 101 is further shifted inward. Depending on how the peripheral edge 5 is displaced and how the three-dimensional plate 1 is moved, the shape of the unevenness on the surface changes. In the present invention, the shape of the convex portion is initially circular or square, but is changed to an ellipse or a rectangle, and is processed into a streamline shape in the moving direction (gravity direction) of the water stream or water droplet 10 that is a fluid. In addition, a part of the unevenness is rounded, the shape is changed to a shape with a small hydrodynamic resistance coefficient, and the capillary action is strengthened. This third process is also referred to as a restructuring process.

  FIG. 4 is a fourth process diagram and shows a state where the punch 102 and the die 101 are moved in opposite directions and released from the plate 1. In this state, the deep drawing process of the plate material 1 is completed, and the shape of the sink 200 is almost completed. In the above four steps, the plate 1 is deformed by the die 101 and the punch 102, and receives friction at the side surface portion, so that heat is generated and the temperature rises. Although the elongation of the plate 1 varies depending on this temperature, in the present invention, it is adjusted within the range of 40 ° C to 80 ° C. This is realized by taking into consideration the heat capacity and surface area of the die 101 and the punch 102 and the driving work rate of the punch 102 and adjusting the air conditioning temperature accordingly.

  After finishing the fourth step, the peripheral edge 5 may be twisted and deformed, so this unnecessary portion is cut and removed. In the second step and the third step described above, the peripheral edge 5 moves toward the center of the die 101. If necessary, a protrusion is attached to the holder 103, and the peripheral edge 5 of the plate 1 is hooked on the peripheral edge 5. The spread amount of the plate 1 may be adjusted by adjusting the amount of movement of 5.

  FIG. 5 is a top view of the deep drawing sink, and FIG. 6 is a cross-sectional view of the deep drawing sink and shows a view taken along the line AA of FIG. The completed sink 200 has a side wall 6, a bottom plate 7, a peripheral edge 5, and corners R1, R2, R3 and a space 4 interposed therebetween. The drain hole 8 provided in the bottom plate 7 may be formed integrally in the deep drawing process of FIGS. 1 to 4 or may be formed by providing a post process. The bottom plate 7 has a gentle downward slope, and can smoothly drain water from the bottom plate 7 to the drain hole 8 by receiving water flowing down from the side wall 6 part or the like. Moreover, if the periphery 5 is extended long, it will become a top plate, and if an uneven | corrugated processed part is continuously attached also to this top plate, the effect will increase further as a whole.

  FIG. 7 shows the relationship between the push-in depth of the punch 102 and the cushion pressure of the holder 103 during deep drawing, which is important in the present invention. The dimensionless cushion pressure P is taken on the horizontal axis, and the dimensionless indentation depth H is taken on the vertical axis, comparing the case of the conventional smooth plate and the case of the plate with unevenness of the present invention. The dimensionless cushion pressure P in the case of the smooth plate 1 shown in FIG. 8 is the same when the dimensionless pushing depth H is 1 from 0 (start point) to 1 (end point) as indicated by black circles. The dimensionless cushion pressure P in the case of the uneven plate material used in the present invention as shown in FIG. 9 is higher than the black circle mark as shown by an example of the square mark in FIG. 7, and is removed as it progresses from the start point to the end point. I will increase it. The method of ascending may be stepwise as in the embodiment shown by the square marks in the figure or may be continuously raised. In this example, the initial dimensionless cushion pressure P is 1, 6 but increased to 1, 9 at the end point. The specifications and conditions relating to the plate 1 used in the embodiment of FIG. 7 are shown below. In this graph, the conventional product and the product of the present invention have the same thickness t1 of the conventional plate 1 shown in FIG. 8 and the thickness t1 of the convex portion 2 of the uneven plate 1 used in the present invention of FIG. Compare.

(Example specifications and conditions)
・ Material: 18-8 stainless steel with polypropylene thin film on the surface ・ Thickness: 0.7mm
・ Number of irregularities of plate material: 17 per inch ・ Depth of irregularities: 0.03 mm (t1-t2 in FIG. 9)
Uneven shape: square (planar shape of the protrusion 2 in FIG. 9)
・ Sink size (see Figs. 5 and 6)
a = 440 mm, b = 365 mm, h = 190 mm
・ Lubricant: Hydrocarbon oil-containing material dissolved in water ・ Lubricant adjustment initial temperature: about 25 ° C.

(Effective range of the present invention)
Various tests were conducted, and the effective range of the present invention is as follows. A sink that has been deep-drawn in the following range can easily flow water continuously from the side wall to the bottom plate through the corners, and has good drainage performance.
(1) Material: Effective for all stainless steel materials (2) Plate thickness: 0, 4 to 1,5 mm
(3) Number of irregularities: 5 to 40 per inch (4) Depth of irregularities: up to about 0.2 mm (t1-t2 in FIG. 9)
(5) Planar shape of irregularities: Not particularly limited, but particularly effective for round, square, triangular, rhombus, ellipse, etc. (6) Restriction of sink size: Although small sizes can be easily manufactured, FIG. It is possible to manufacture up to dimension a or b in Fig. 6 of 300 mm or more and h dimension of 150 mm or more. Of course, it is effective when the side wall is inclined toward the inside, but it is also effective for a vertical wall that is sharply cut. (7) Arc size of sink corner: effective even for very small dimensions, R1 in FIG. It can be manufactured even when the locality radius of the portion is about 100 mm or less, and the locality radius of the R2 and R3 portions of FIG. 6 can be manufactured up to about 20 mm.

(Recommended values for lubricant and cushion pressure)
(1) Type of lubricant and initial adjustment temperature: those containing a hydrocarbon oil are preferable, and the initial adjustment temperature is preferably in the range of 10 ° C to 30 ° C.
{Circle around (2)} Cushion pressure: Although it is necessary to change depending on the plate thickness and the number of irregularities, in the above-mentioned effective range of the present invention, it is only necessary to set up within the range of the upper limit value and the lower limit value shown in FIG. Specifically, when the case of the conventional smoothing material is 1, the lower limit value is in the range of 1, 1 to 1, 3 times, and the upper limit value is in the range of 2, 0 to 2, 5 times.

(Cross section shape and drainage)
According to the present invention, the cross-sectional shape of the projections and depressions becomes a shape that hydrodynamically reduces the resistance coefficient and easily receives the capillary force. This is made in the process of spreading the plate 1 in the second step shown in FIG. 2 and the third step shown in FIG. The first circular shape is an ellipse, the square one is a rectangle, and it becomes streamlined in the fluid flow direction. Furthermore, at the corners of the concaves and convexes that oppose the fluid flow, the corners of the convex portions are removed and rounded, thereby reducing the resistance coefficient of the fluid. Further, the corner angle formed by the concave portion and the convex portion is opened, and water droplets adhering to the convex portion are easily sucked into the concave portion. Both of these effects improve drainage. These will be described in detail below.

  FIG. 10 shows the frequency distribution of the diameter of water droplets attached to the sink side wall using a conventional smooth plate material. In this experiment, an actual sink was used, water was sprayed on the side wall at room temperature, and measurement was performed by photographic observation. The water remaining on the side wall temporarily spreads in a wide film shape. After a while, this water film is divided into several parts by the surface tension, and each water film is finally divided into small water droplets while being divided into small parts. These water droplets remain on the wall surface as they are without dropping down due to the adhesion of the sink inner wall. The diameter and number of each water droplet within a square of 100 mm on the side wall are measured, the diameter D (mm) of the water droplet adhering to the horizontal axis, and the frequency (%) on the vertical axis. When the diameter of the water droplet is 2 mm or more, the frequency is high and 3 mm is the highest normal distribution. There is almost no thing of 1 mm or less.

  Accordingly, when the diameter of the convex portion 9 attached to the inner surface of the sink 200 and the gap of the concave portion 3 are at least 3 mm or less, preferably 2 mm or less, the water draining property is improved. This is because when the convex portion 9 and the concave portion 3 are adjusted to such a size, the water droplets 10 attached to the upper surface of the convex portion 9 cannot stably exist on the surface and flow into the concave portion 3. The same applies to the concave portion 3, and the shape of the water droplet 10 is immediately deformed in the flow direction and moves downward by gravity. Since the concave portion 3 is a communication groove, it merges and merges with the water droplets 10 of the adjacent convex portion 9 to increase the flow speed and move downward.

  In addition to the adjustment of the size of the convex portion 2 and the concave portion 3, such an effect is a streamline type in which the shape of the convex portion 9 is long in the fluid flow direction, and the corners of the convex portion 9 and the corners of the concave portion 3 are rounded. It is also important to exist. The present invention provides a shape suitable for such purposes.

11 is a plan view showing the structure of the four planes of the side wall 6 of the sink 200 of the present invention and the convex portion 9 on the side wall of the corner R1, and FIG. 12 is a cross-sectional view taken along the line CC in FIG. Specifically, FIG. 12 is a view of the four planes of the side wall 6 of the sink 200 and the side wall of the corner R1 as seen from the direction perpendicular to the surface. The upper part of FIG. 11 is close to the peripheral edge 5, and the lower part of FIG. 11 is close to the bottom part 7. When the deep drawing method of the present invention is used, the shape of the convex part 2 of the plate material 1 used first is circular in the four planes of the side wall 6 of the sink 200 and the vertical direction of the side wall of the sink corner R1. In other words, it is deformed into an elliptical convex portion 9. It is important that the major axis a1 and minor axis b1 of the convex portion 9 deformed into an elliptical shape in FIG. 11 is at least about 3 mm or less, preferably about 2 mm or less from the normal distribution of the water droplet 10 shown in FIG. It is also important that the gaps S1 and S2 of the recesses are at least about 3 mm or less, preferably about 2 mm or less.
In order to further promote the draining action, it is preferably performed when the corners of the convex portions 9 and the corner portions of the concave portions 3 are rounded. In the cross-sectional view of FIG. 12, the locality radius r <b> 1 at the corner of the convex portion 9 and the locality radius r <b> 2 at the corner portion of the concave portion 3 are preferably at least 0.01 mm or more. The presence of the locality radius r1 at the corner of the convex portion 9 facilitates the movement of the water droplet 10 attached to the upper surface of the convex portion 9 into the groove of the concave portion 3. In addition, the presence of the radius of curvature r2 at the corner of the recess 3 reduces the wet edge length of the water droplet 10 in the recess 3 and facilitates the movement of the water droplet 10 in the direction of gravity.

  For comparison with FIG. 12, FIG. 13 shows a cross-sectional view of the plate member 1 with unevenness having a completely rectangular cross-sectional shape. When the cross-sectional shape is a complete rectangular cross-section in this way, the water droplet 10 attached to the surface of the convex portion 9 is not easily moved to the concave portion 3 due to insufficient surface tension effect. Moreover, since the wet edge length increases compared with the case of FIG. 12, the water droplet 10 which exists in the recessed part 3 becomes larger, and becomes difficult to move to the gravity direction. Sometimes, after the water droplet 10 moves, a part 10-a thereof remains in the corner of the recess 3 and the water draining property is deteriorated.

  FIGS. 14 to 21 describe in detail the uneven structure processed on the inner surface of the sink 200 of the present invention.

  FIG. 14 is a plan view in the case where the planar shape of the initial unevenness is circular, and FIG. 15 is a DD cross section of FIG. The diameter of the tip of the convex part 2 is d1, and the diameter of the root is d2. The corner angle θ1 of the r2 portion existing at the base of the recess 3 is initially about 100 degrees. The tip of the convex portion 2 is slightly middle and high.

  FIG. 16 is a plan view after deep drawing according to the present invention, and shows a shape in which the circular convex portion 2 in FIGS. 14 and 15 is deformed into an elliptical convex portion 9. 17 is a cross-sectional view taken along line EE in FIG. The convex portion 9 is deformed into an ellipse with respect to the fluid flow direction, and the major axis of the tip of the convex portion 9 is a1, the minor axis is b1, the major axis of the base of the convex portion 9 is a2, and the minor axis is b2. The size of the major axis a1 and the minor axis b1 is 3 mm or less, preferably 2 mm or less. The corner angle θ2 of the r2 part is preferably opened from the initial corner angle θ1 of FIG. Further, according to the processing method of the present invention, the recess 3 moves toward the inner surface side by Δh from the P surface on the back of the sink 200. The movement amount Δh of the concave portion 3 is about 0.005 mm or more, and accordingly, the concave portion 3 is curved toward the inside of the sink 200, and this curvature is suitable for suction of the water droplet 10 on the convex portion 9 into the concave portion 3. Works. Moreover, the convex part 9 processed by the sliding surface of the punch 102 is flat with respect to the convex part 2 in FIG. 15, and a streak directed in the fluid flow direction is attached to the surface. Although this streak is about 0.002 mm, the movement of the water droplet 10 attached to the convex portion 9 to the concave portion 3 is promoted.

  FIG. 18 is a plan view of the plate material when the initial planar shape of the convex portion is a square, and FIG. 19 is a plan view when the plate material of FIG. 18 is deep-drawn. As shown in FIG. 19, it is processed into a shape extending in a rectangular shape in the fluid flow direction. The major axis a1 and minor axis b1 of the tip of the convex part 9 are adjusted to at least 3 mm or less, preferably 2 mm or less. The radius of curvature r3 of the rounded corners of the four corners when the convex portion 9 is viewed in a plan view is also important, and the radius of curvature r3 is set to 0.005 mm or more. Processing in this way contributes to reducing the resistance coefficient of the fluid.

  FIG. 20 shows a case where the planar shape of the convex portion is a square rhombus initial shape. FIG. 21 is a plan view of the shape of the convex portion of the present invention obtained by deep drawing the shape of FIG. It is processed into a long diamond shape with respect to the fluid flow direction. The major axis a1 and the minor axis b1 of the convex part 9 are at least 3 mm or less, preferably 2 mm or less. The radius of curvature r3 of the rounded corners of the four corners when the convex portion 9 is viewed in a plan view is also important, and the radius of curvature r3 is set to 0.005 mm or more. Processing in this way contributes to reducing the resistance coefficient of the fluid.

  The convex portions 9 of the present invention shown in FIGS. 16, 19, and 21 are streamlined with respect to the fluid flow direction, and such convex portions 9 are formed on the side wall 4 plane of the sink 200 and the four corner R1 portions. Of the side wall of the steel plate so as to be present in a large amount, particularly in the upper part, that is, the part close to the peripheral edge 5. When processed in this way, the upper portion of the side wall farthest from the drainage hole 8 has good drainage properties, and the sink 200 suitable for the purpose can be realized, which is convenient for practical use.

  FIG. 22 is a perspective view showing an arrangement pattern of the protrusions 2 near the corner R1 of the sink 200. FIG. The overall arrangement pattern is processed into a convex arc shape with respect to the drain holes 8. The sidewalls of the four corners R1 on the diagonal line shown here are geometrically distant from the drainage holes 8 with respect to the four planar sidewalls 6 seen from the top surface of the sink 200, so Deteriorate. In the present invention, the structure of the convex portion 2 on the side wall portion of the corner portion R1 is streamlined in the fluid flow direction as described above, and as shown in FIG. 22, the convex portion on the side wall portion of the R1 portion. 2 (shown by black circles in this figure) is processed into a convex arc shape with respect to the drain holes 8, so that the water droplets 10 adhering to the vicinity of the corner R1 move downward. As you do, it will be easier to meet and gather, and the movement speed will increase. Since the side wall portion of the four corners R1 is the portion farthest from the drain hole 8, if the short diameter b1 of the convex portion 9 and the gap S1 of the concave portion 3 are made smaller than those of the four planar portions of the side wall 6, The effect of increases. For example, in one embodiment, in the plane of the side wall 4, the side wall portions of the four corners R 1 with respect to the major axis a 1 = 1, 2 mm, the minor axis b 1 = 1, 0 mm, and the gap S 1 = 1, 5 mm Then, a1 = 1, 5 mm, b1 = 0, 8 mm, and S1 = 1,0 mm. Moreover, the arrangement | sequence pattern shown in FIG. 22 contributes also to the improvement of aesthetics.

First drawing of deep drawing (initial setting) Second drawing of deep drawing (at the start of deep drawing) Third drawing of deep drawing (at the end of deep drawing) Fourth drawing of deep drawing (when punch and die are opened) Top view of deep drawing sink Cross-sectional view of deep drawing sink (viewed along arrow AA in FIG. 5) Relationship between indentation depth and holder cushion pressure during deep drawing of the present invention Side view of conventional smooth plate Side view of uneven plate used in the present invention Frequency distribution of water droplet diameter attached to the side wall of a sink using a conventional smooth plate The top view which shows the arrangement | sequence of the unevenness | corrugation of the sink side wall of this invention CC sectional view of FIG. Cross-sectional view of uneven plate with full rectangular cross-section The top view which shows the initial shape of the circular convex part of the uneven | corrugated board | plate material used for this invention DD sectional view of FIG. 14 is a plan view of the convex portion after deep drawing of the plate material of FIG. EE sectional view of FIG. The top view which shows the initial shape of the unevenness | corrugation of the other uneven | corrugated board | plate material used for this invention The top view of the convex part after the deep drawing process of the board | plate material of FIG. The top view which shows the initial shape of the convex part of the other uneven | corrugated board | plate material used for this invention 20 is a plan view of the convex portion after deep drawing of the plate material of FIG. The perspective view which shows the arrangement pattern of the unevenness | corrugation of a sink corner part

Explanation of symbols

1 ... Plate material (or material)
2 ... convex part 3 ... concave part 4 ... space 5 ... edge (or peripheral edge)
6 ... Side wall 7 ... Bottom plate 8 ... Drain hole 9 ... Deformed convex part 10, 10-a ... Water drop 101 ... Die 102 ... Punch 103 ... Holder 200 ··· sink a1 ··· major axis a2 of the tip of the convex portion ··· major axis b1 of the root portion of the convex portion ··· minor axis b2 of the tip portion of the convex portion ··· minor axis d1 of the root portion of the convex portion ... Diameter d2 of the tip of the circular convex part ... Diameter s1, s2 of the base part of the circular convex part ... Gap length r1 of the concave part ... Local radius r2 of the corner of the convex part ··· radius of curvature r3 at the corner of the concave portion ··· radius of curvature R1, R2, R3 · · · corner radius of the sink or each corner θ1 ... initial corner angle θ2 · · · ..Corner angle after deep drawing

Claims (10)

A deep drawing sink in which irregularities are continuously provided on the inner side wall and bottom plate of the deep drawing sink and the surface of the corner between them. The deep drawing sink according to claim 1, wherein unevenness is also provided on the peripheral edge or the surface of the top plate and continuously connected to the unevenness processing portion of the side wall. At least the unevenness on the side wall surface or the side wall 4 plane of the four corners as viewed from the top of the deep drawing sink is deformed long in a direction substantially perpendicular to the periphery or the plane of the top plate. The deep-drawing sink according to claim 1 or 2, characterized in that there is what is present. A part of the unevenness is rounded to reduce the resistance coefficient of the fluid, and a corner angle formed by the concave part and the convex part has a corner angle of 110 degrees or more. Item 6. The deep drawing sink according to item 3. 5. The deep drawing according to claim 1, wherein the arrangement structure of the irregularities on the surface of the four corner side walls as viewed from the upper part of the deep drawing sink is a circular arc shape convex to the drainage hole. Processing sink. The thinning ratio of the flat side wall and the four corner side walls of the deep drawing sink is in the range of 20% to 50% and 20% to 60%, respectively, with respect to the peripheral edge or the top plate having a low processing rate. The deep drawing sink according to claim 1, wherein: The radius of curvature of the four corners seen from the top of the deep drawing sink, the corner between the side wall and the bottom plate, and the corner between the top plate and the side wall is about 20 mm or more. The deep drawing sink according to claim 1. The cushion pressure of the holder during deep drawing of the plate material increases stepwise or continuously as the degree of deep drawing progresses. At least the cushion pressure is 1.1 times that when processing a smooth plate of the same thickness. A deep drawing method for a plate material having irregularities on its surface, characterized in that it is as described above. The lubricant applied to the surface of the plate material contains at least hydrocarbon oil, and is controlled in the range of 10 ° C. to 30 ° C. when applied to the plate material. When processing the plate material with a die or punch, friction heat, etc. The deep drawing method for a plate material having irregularities on the surface according to claim 8, wherein the processing temperature of the plate material is adjusted to a range of 40 ° C. to 80 ° C. while taking into account the temperature rise. 10. The deep drawing method for a plate material having unevenness on the surface according to claim 8 or 9, wherein the plate material is stainless steel, and the surface having the unevenness is provided with a thin film such as polypropylene. .