Progressive die for metal press with right-angle cutting process

Abstract

To solve a problem that, when using only a press progressive die for thin-plate metal processing, punching can be performed as separation processing, however, square cutting in a horizontal direction cannot be performed, and when the square cutting is required, it is necessary to use a different die by a press machine different from the progressive die.SOLUTION: A press progressive die for thin-plate metal processing is substituted for a press progressive die which is constituted of a positioning step of processing a feed positioning notch, a throttling step of throttling a succeeding product into a prescribed shape, and a product separation step of sequentially moving the die in fore-and-aft / left-and-right horizontal four directions by pushing down a succeeding punch, and shearing a product in a horizontal direction, and product square-cut cutting thereby becomes unnecessary in a post-step.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention A progressive die for metal presses that can perform drawing, equipped with a cutting process die that can perform a right-angle cut horizontally against the side of the drawn product. This relates to progressive dies for processing thin metal plates. [Background technology]

[0002] Conventional progressive press dies for processing thin metal sheets such as iron, copper, and aluminum have a structure in which an upper base to which multiple punches are fixed and which moves up and down, and a lower base to which multiple dies are similarly fixed, and the thin metal sheet is moved horizontally at predetermined intervals between them to perform the notch processing process for positioning the feed, the drawing processing process, and the cutting processing process.

[0003] However, with only a progressive die for a press for processing thin metal plates configured in this way, the press die only moves up and down for separation, so while it is possible to separate the product and trim the lip during punching or flanging, it is not possible to perform a right-angle cut horizontally on the side of the pressed product, and therefore, if a right-angle cut is required for a product, it must be performed using a separate die on a press machine separate from the progressive die, which is time-consuming and leads to increased product costs. An example of this is Japanese Patent Laid-Open No. 2005-199284, but even with this method it is not possible to perform a right-angle cut horizontally on the product within the progressive die. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-199284 A Summary of the Invention [Problem to be solved by the invention]

[0005] The problem we are trying to solve is The progressive die for metal press has a die for cutting a positioning notch, a die for drawing into a predetermined shape, and a die for separating the product. The die has a cutting process die that can separate the product by cutting it horizontally at right angles to the side of the product that has been pressed into a predetermined shape. To provide a progressive press die for thin sheet metal processing. [Means for solving the problem]

[0006] The main feature of the present invention is that by using a progressive die for pressing thin sheet metal processing with a cutting process that cuts horizontally, it is possible to cut the product at right angles within a series of progressive dies, eliminating the need for horizontal right-angle cutting on the side of the product in a later process. [Effects of the Invention]

[0007] The present invention eliminates the need to cut the side of the product at right angles in the horizontal direction using a separate die in a press machine separate from the progressive die, which saves time and effort and reduces the cost of the product. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 10 is an explanatory diagram showing an outline of the progressive die in a state where the upper base is raised. [Figure 2] FIG. 10 is an explanatory diagram showing an outline of the state in which the upper base of the progressive die is fully lowered. [Figure 3] FIG. 1 is an explanatory diagram of a thin metal plate processed by a progressive die. [Figure 4] FIG. 10 is an explanatory diagram of the state in which the upper base is raised during the separation process. [Figure 5] FIG. 10 is an explanatory diagram of the state in which the upper base is lowered during the separation process. [Figure 6] FIG. 10 is an explanatory diagram showing a state in which the separation die has moved to the right in the separation process. [Figure 7] FIG. 10 is an explanatory diagram showing a state in which the separation die has moved inward in the separation process. [Figure 8] FIG. 10 is an explanatory diagram showing a state in which the separation die has moved to the left in the separation process. [Figure 9] FIG. 10 is an explanatory diagram showing a state in which the separation die has moved toward the front in the separation processing step. [Figure 10] FIG. 10 is a partial cross-sectional perspective view of the mold in the separation process. DETAILED DESCRIPTION OF THE INVENTION

[0009] The present invention relates to a progressive die for metal presses that performs drawing processing using a plurality of punch and die sets while conveying thin metal sheets between an upper base and a lower base. The die includes a positioning notch processing die that processes a notch for positioning the feed and that is composed of a punch fixed to the upper base and a die fixed to the lower base; a drawing die consisting of a punch fixed to an upper base and a die fixed to a lower base, which draws the product into a predetermined shape; a separating punch fixed to the upper base, formed to have a dimension capable of entering the inside of the product being drawn, and having a punch cut surface formed around the entire circumference of a tip shoulder portion capable of shearing the product being drawn in the horizontal direction; the upper part has a cut hole formed therein into which the product in the middle of drawing can be inserted, and when the upper base is lowered, the upper surface of the cut hole is always substantially level with the cut surface of the separation punch, and a die cut surface is formed which can shear the product in the middle of drawing by moving it horizontally; the outer surfaces of the lower part in the four directions of the front, rear, left and right have a trapezoidal vertical cross section extending in the same horizontal plane, the lower surface of the trapezoid is formed as a slope that rises toward the outer diameter direction, and the upper surface is formed as a slope that descends toward the outer diameter direction, and a separation die which can be moved back and forth and left and right and is formed with small die protrusions on each of the front, rear, left and right in the same horizontal plane; a separating die frame that covers the outer periphery of the separating die so that the die cannot be released, and has a trapezoidal vertical cross section on each of the four inner surfaces of the inner surface in the front, rear, left, and right directions, the upper surface of the trapezoid being formed as a slope that descends toward the inner diameter direction, and the lower surface being formed as a slope that ascends toward the inner diameter direction, with die frame small protrusions formed on each of the front, rear, left, and right inner surfaces in a stepped manner from the top; When the upper base is lowered, the separation die is pressed down by the die push-down rod, and the inclined surface on the underside of the small die projection that rises toward the outer diameter comes into contact with the inclined surface on the upper surface of the small die frame projection that descends toward the inner diameter. When the separation die is pressed down in this state, both projections slide along the inclined surface, and the separation die can be moved in the opposite direction of the small die projection that is in contact with the small die frame projection. This allows the separation die to move in the front-to-back and left-to-right directions, and the punch cut surface of the separation punch and the die cut surface of the separation die can separate the side of the product being drawn from the thin metal plate. Subsequently, by further pressing down the separation punch, the die is moved in four horizontal directions (front-to-back and left-to-right) in succession to shear the product horizontally. This is done in a progressive die for metal presses into which a product separation processing die is incorporated. [Example]

[0010] The following examples are given in the drawings. invention will be explained in detail. In the embodiment shown in Figs. 1 to 10, 1 is a progressive die for pressing attached to a press machine for processing a thin metal plate 2, and this progressive die 1 is an upper base that moves up and down by the press machine. 1a and the lower base fixed to the press 1b and a plurality of sets of punches 3 and dies 4 attached to the respective bases.

[0011] this For press A plurality of punches 3 are fixed to the upper base 1a of the progressive die 1, and dies 4 are fixed to the lower base 1b at positions corresponding to the upper base 1a. For positioning Notching, drawing, Product Separation It is configured so that processing can be performed sequentially.

[0012] Feed positioning notch Processing mold 5 is a process for forming positioning notches 5c in the thin metal plate 2 using a positioning punch 5a fixed to the upper base 1a and a positioning die 5b fixed to the lower base. This feed positioning notch forming process 5 is the first punching process performed on the thin metal plate 2 as the upper base 1a descends, and after this, the thin metal plate 2 is guided by the positioning notches 5c and punched at equal intervals. To drawing and cutting It will be sent. In the illustration, the positioning notches 4c are shown as holes, but any type of notch can be used as long as it can achieve the purpose of positioning. For example, the end of the thin metal plate 2 may be cut out at equal intervals.

[0013] Next, the thin metal plate 2 is guided by the positioning notch 5c and sent to the drawing die 6, which is connected to a drawing punch 6a fixed to the upper base 1a. This drawing punch 6a and the corresponding part The upper base 1a is lowered to draw the thin metal plate 2 so that the outer and inner surfaces of the thin metal plate 2 have a predetermined shape (a square shape in the description of this embodiment) using a drawing die 6b fixed to the lower base 1b, and the outer and inner surfaces of the part that will become the product are processed but are not separated from the thin metal plate 2 itself, resulting in a mid-drawing product 6c. Most of the periphery of the mid-drawing product 6c is separated from the thin metal plate 2, but a portion remains connected to the thin metal plate 2 as a connecting portion 6d. In this way, the periphery of the intermediate drawing product 6c is simultaneously separated from the thin metal plate 2 by the drawing die 6 in order to stabilize the shape and dimensions of the intermediate drawing product 6c when performing the drawing process, but this is not necessarily required.

[0014] Next, the intermediate drawing product 6c is set at a distance of several pitches by the positioning notch 5c. Separation processing where drawing process and Separation processing The reason for providing a gap of several pitches between the thin metal plates 2 is to allow for a slight shaking in the direction of travel or in the lateral direction when the thin metal plate 2 is cut off.

[0015] Separation processing mold 7 is composed of a product separation punch 7a fixed to the upper base 1a, a die push-down rod 7e fixed to the upper base 1a, a separation die 7b, a separation die frame 7c attached to the lower base 1b so as to cover the outer periphery of the separation die 7b, and a coil spring 7d that urges the separation die 7b upward.

[0016] The separation punch 7a is formed to have approximately the same size as the inner diameter of the intermediate drawing product 6c, but is sized to be able to enter the interior of the intermediate drawing product 6c, and furthermore, the entire circumference of the tip shoulder portion is configured as a punch cut surface 7g shaped to be able to shear the intermediate drawing product 6c in the horizontal direction. Furthermore, the tip of this separation punch 7a is configured as a punch reduced diameter portion 7f, which presses the inner bottom surface of the intermediately drawn product 6c, thereby pressing the intermediately drawn product 6c against a cut hole 7h in a separation die 7b described below.

[0017] A die push-down rod 7e attached near the separation punch 7a is attached to the upper base 1a so that it can move up and down in synchronization with the separation punch 7a, and acts to always keep the die cut surface 7i and punch cut surface 7g horizontal while pushing down a separation die 7b (described later).

[0018] Reference numeral 7b denotes a separation die, and this separation die 7b is movable back and forth and left and right within a separation die frame 7c described below. A cut hole 7h is formed in the upper part of the separation die 7b so that the in-process drawn product 6c can fit therein and is formed with dimensions approximately the same as the outer diameter of the in-process drawn product 6c. The upper surface of the separation die 7b is configured as a die cut surface 7i which, by moving when the upper base 1a is lowered, becomes approximately level with the punch cut surface 7g of the separation punch 7a and can shear the in-process drawn product 6c in the horizontal direction. The outer surfaces of the lower part in all four directions, front and back, left and right, have trapezoidal vertical cross sections extending in the same horizontal plane, and the lower surface of the trapezoid is formed as an inclined surface that rises toward the outer diameter direction, and furthermore, the upper surface is formed as an inclined surface that descends toward the outer diameter direction, with small die protrusions 7j formed one on each of the front, back, left and right in the same horizontal plane.

[0019] This separation die 7b is held by a coil spring 7d. The bottom always Cutting die frame 7c Although it is biased upward, when the upper base 1a is descending, the die push-down rod 7e comes into contact with the upper surface of the separation die 7b so that the punch cut surface 7g of the separation punch 7a can be maintained in a position approximately horizontal with the die cut surface 7i of the separation die 7b, and as the upper base 1a subsequently descends, the die push-down rod 7e presses down the separation die 7b, so that the punch cut surface 7g of the separation punch 7a and the die cut surface 7i of the separation die 7b can maintain an approximately horizontal state that allows them to shear the product 6c horizontally during the drawing process.

[0020] Reference numeral 7c denotes a separation die frame fixed to the lower base 1b so as to cover the outer periphery of the separation die 7b. This separation die frame 7c houses a coil spring 7d therein that urges the separation die 7b upward and prevents the separation die 7b from slipping out upward.

[0021] Furthermore, on each of the four surfaces of the inner surface of the separating die frame 7c in the front, rear, left, and right directions, there are formed die frame small protrusions 7k, each of which has a trapezoidal vertical cross section, with the upper surface of the trapezoid formed as a slope descending toward the inner diameter direction and the lower surface formed as a slope ascending toward the inner diameter direction, in a stepped manner from top to bottom.

[0022] In this separation process, as shown in FIG. 4, the in-process product 6c is first brought to a predetermined position, and the separation punch 7a and die push-down rod 7e are lowered together with the upper base 1a, so that the punch cut surface 7g and die cut surface 7i shown in FIG. 5 are positioned approximately horizontally. As the upper base 1a is lowered, the separation die 7b is pressed down by the die push-down rod 7e, and the lower surface of the die small protrusions 7j formed on the outer periphery on all four sides of the separation die 7b comes into contact with the upper surface of the uppermost die frame small protrusion 7k arranged in a stepped pattern, the upper surface of which slopes upward toward the outer diameter (the die small protrusion 7j on the left in the illustration) and slopes downward toward the inner diameter (the die frame small protrusion 7k on the left in the illustration). When the separation die 7b is further pressed down, the separation die 7b slides along the slopes of both protrusions, moving in the opposite lateral direction (to the right in the illustration) of the die frame small protrusion 7k with which it is in contact.

[0023] Furthermore, when the upper base 1a descends, the separation die 7b is pressed down by the die push-down rod 7e, and at the same time, it moves to the right as illustrated in the figure, thereby moving the in-process drawn product 6c to the right as well, so that the punch cut surface 7g of the separation punch 7a and the die cut surface 7i of the separation die 7b remain in an almost horizontal position and reach the position shown in Figure 6, and at this time the left side of the in-process drawn product 6c is sheared horizontally and at a right angle to the side by the punch cut surface 7g and the die cut surface 7i.

[0024] When the upper base 1a is further lowered, the positional relationship shown in Figure 7 is reached, and the die small protrusion 7j rides up onto the second from the top small die frame protrusion 7k (the rear side in the explanation of Figure 7), causing the separating die 7b to move to the front side, and the rear side of the mid-drawn product 6c is sheared at a right angle.In the same way, when the upper base 1a is lowered, the die small protrusion 7j rides up onto the third from the top small die frame protrusion 7k (the right side in the explanation of Figure 8), reaching the position shown in Figure 8.When the right side of the mid-drawn product 6c is further pushed down to the position shown in Figure 9, the front side of the mid-drawn product 6c is sheared at a right angle, and all four sides of the mid-drawn product 6c are separated from the thin metal plate 2, and the mid-drawn product 6c becomes the finished product 8.

[0025] In this way, a series of steps is completed, and the upper base 1a rises. Separation die 7b is raised by the coil spring 7d, The upper surface of the die small projection 7j is formed as an inclined surface that slopes downward toward the outer diameter direction, and the lower surface of the die frame small projection 7k is formed as an inclined surface that slopes upward toward the inner diameter direction. Therefore, the separating die 7b moves back and forth and left and right while the inclined surfaces are in contact with each other. When the process is completed by returning to the position shown in FIG. 4, the finished product 8 separated from the thin metal plate 2 can be removed from the mold. [Industrial Applicability]

[0026] Since the present invention is configured as described above, it can be applied to any press-processing of thin metal plates such as iron, copper, and aluminum, and can be used to process a variety of products that contain contents such as cosmetics, tableware, and stationery. [Explanation of symbols]

[0027] 1 Progressive die 1a Upper base 1b Lower base 2 Thin metal plates 3 Punch 4 Die 5. Positioning notch processing mold 5a Positioning notch punch 5b Positioning notch machining die 5c Positioning notch 6. Drawing mold 6a Drawing punch 6b Drawing die 6c Drawing process in progress 6d connection part 7 Separation processing mold 7a Separation punch 7b Separation die 7c Cutting die frame 7d coil spring 7e Die push-down rod 7f Punch reduced diameter part 7g punch cut surface 7h cut hole 7i die-cut surface 7j small die protrusion 7k die frame small protrusion 8 Finished product

Claims

[Claim 1] In a progressive die for metal presses, which performs drawing using a plurality of sets of punches and dies while conveying a thin metal plate between an upper base and a lower base, a positioning notch processing die is provided, which is composed of a punch fixed to the upper base and a die fixed to the lower base, which processes a notch for positioning the feed; a drawing die consisting of a punch fixed to an upper base and a die fixed to a lower base, which draws the product into a predetermined shape; A progressive die for metal press having a product separation processing die, The separation mold for the product is: a separating punch fixed to the upper base, formed to have a dimension capable of entering the inside of the product being drawn, and having a punch cut surface formed around the entire circumference of a tip shoulder portion capable of shearing the product being drawn in the horizontal direction; the upper part has a cut hole formed therein into which the product in the middle of drawing can be inserted, and when the upper base is lowered, the upper surface of the cut hole is always substantially level with the cut surface of the separation punch, and a die cut surface is formed which can shear the product in the middle of drawing by moving it horizontally; the outer surfaces of the lower part in the four directions of the front, rear, left and right have a trapezoidal vertical cross section extending in the same horizontal plane, the lower surface of the trapezoid is formed as a slope that rises toward the outer diameter direction, and the upper surface is formed as a slope that descends toward the outer diameter direction, and a separation die which can be moved back and forth and left and right and is formed with small die protrusions on each of the front, rear, left and right in the same horizontal plane; a separating die frame that covers the outer periphery of the separating die so as not to allow the die to escape, and has a trapezoidal vertical cross section on each of the four inner surfaces of the inner surface in the front, rear, left, and right directions, the upper surface of the trapezoid being formed as a slope that descends toward the inner diameter direction, and the lower surface being formed as a slope that ascends toward the inner diameter direction, with die frame small protrusions formed one on each of the front, rear, left, and right inner surfaces in a stepped manner from the top, When the upper base is lowered, the separating die is pressed down by the die push-down rod, and the inclined surface on the underside of the small die projection, which rises toward the outer diameter, comes into contact with the inclined surface on the upper surface of the small die frame projection, which falls toward the inner diameter. When the separating die is pressed down in this state, both projections slide along the inclined surfaces, and the separating die can be moved in the opposite direction to the small die projection that is in contact with the small die frame projection. This allows the separating die to be moved in the front-to-back and left-to-right directions, and the punch-cut surface of the separating punch and the die-cut surface of the separating die can separate the side of the product being drawn from the thin metal plate. Subsequently, by further pressing down the separating punch, the die is moved in four horizontal directions, front-to-back and left-to-right, thereby horizontally shearing the product.

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