Trimming die and trimming method

Abstract

The present application belongs to the technical field of aluminum alloy die casting trimming die, and particularly relates to a trimming die and a trimming method. The trimming die comprises an upper die and a lower die. The bottom surface of the upper die is provided with a plurality of product pre-pressing blocks. The top surface of the lower die is provided with product fixing blocks corresponding to the product pre-pressing blocks one by one. The product fixing blocks are arranged on the lower die through elastic supporting members. At least one side of the product fixing block is provided with a movable cutter mechanism, which comprises a movable cutter. In other words, during the closing process of the upper die and the lower die, the product pre-pressing blocks first press the product downward to the product fixing blocks for positioning, and then the product pre-pressing blocks continue to press downward. During the downward movement of the product, the inclined outer wall of the product applies an outward lateral thrust to the movable cutter, so that the cutting part of the movable cutter moves outward and upward along the outer wall of the product, and cuts off the waste on the product when the cutting part contacts the waste. The movable structure design function of the cutting edge can match multiple die casting molds for producing products with a set of fine trimming mold, thereby reducing the development cost of the fine trimming mold.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aluminum alloy die casting trimming die, and particularly relates to a trimming die and a trimming method. BACKGROUND

[0002] The whole die casting includes a runner, a product, a slag ladle and a flash burr. In order to obtain the product after molding, the rest of the aluminum material needs to be removed by using the trimming die. The trimming die is a die used for removing the rest of the waste material such as the runner, the slag ladle and the flash burr.

[0003] Generally, when producing small batches of products, the operator will manually knock off the excess part on the die casting. However, the fracture at the position of the gate and the slag ladle is extremely uneven, and the operator is difficult to remove it completely. At the same time, when producing in large quantities, the efficiency of removing the excess part by manual knocking is relatively low. Compared with the thin-walled casting, the product will be deformed and collapsed by manual knocking, which affects the product quality.

[0004] At present, the traditional method is to design the trimming die to improve the efficiency and product quality. Most of the current trimming dies are designed to correspond to one trimming die for one product die. However, since there are many sets of dies for the same product, the details, burrs, product size tolerance and different profile of each set of dies are different, so it is necessary to redesign the punch, adjust the position of the punch, or redesign a new punch. In addition to wasting time, it also increases the development cost of the trimming die. SUMMARY

[0005] The purpose of the present application is to provide a trimming die and a trimming method, which can trim the castings with similar structures without changing the punch, so as to reduce the cost and time of re-opening the trimming die.

[0006] The first aspect of the present application provides a trimming die. The trimming die comprises: an upper die and a lower die;

[0007] The bottom surface of the upper die is provided with a plurality of product pre-pressing blocks;

[0008] The top surface of the lower die is provided with product fixing blocks corresponding to the product pre-pressing blocks one by one; the product fixing blocks are arranged on the lower die through elastic supporting pieces; at least one side of the product fixing block is provided with a movable cutter mechanism, which comprises a movable cutter;

[0009] During the closing process of the upper die and the lower die, the product pre-pressing blocks first press the product downward to the product fixing blocks for positioning, and then the product pre-pressing blocks continue to press downward. During the downward movement of the product, the inclined outer wall of the product applies a lateral outward thrust to the movable cutter, so that the cutting part of the movable cutter moves outward and upward along the outer wall of the product, and removes the waste on the product when the cutting part contacts the waste.

[0010] In an embodiment of the present application, the lower mold comprises:

[0011] a lower mold base plate;

[0012] a plurality of support plates mounted on the lower mold base plate, and a plurality of first accommodating holes for accommodating lower ends of the elastic supports are arranged on the support plates;

[0013] the product fixing block is arranged on the upper surface of the support plate, and a lower surface of the product fixing block is provided with a plurality of second accommodating holes for accommodating upper ends of the elastic supports.

[0014] In an embodiment of the present application, the movable cutter mechanism comprises:

[0015] a plurality of fixed members, the insertion ends of which are fixed on the side wall of the product fixing block through the movable cutter;

[0016] a plurality of elastic members, each of which is sleeved on a corresponding fixed member, and one end of the elastic member abuts against the movable cutter, and the other end abuts against the head of the fixed member.

[0017] In an embodiment of the present application, an intermediate block is arranged between the end of the elastic member and the movable cutter.

[0018] In an embodiment of the present application, a longitudinal strip-shaped hole is arranged on the movable cutter for the insertion end of the fixed member to pass through;

[0019] a through hole is arranged on the intermediate block for the insertion end of the fixed member to pass through.

[0020] In an embodiment of the present application, the upper surface of the product fixing block is provided with a plurality of profiled positioning blocks matched with positioning grooves on the bottom surface of the product.

[0021] In an embodiment of the present application, the upper mold comprises an upper mold base plate;

[0022] the product pre-pressing block is arranged on the lower surface of the upper mold base plate;

[0023] a plurality of guide sleeves are arranged on the upper mold base plate;

[0024] a guide column for inserting the corresponding guide sleeve is arranged on the lower mold base plate.

[0025] In an embodiment of the present application, the circumferential side of the product fixing block is further provided with a plurality of fixed cutters.

[0026] In an embodiment of the present application, the included angle between the outer wall and the bottom surface of the product is 90.5°-91.5°.

[0027] In an embodiment of the present application, the junction of the outer wall and the bottom surface of the product is provided with a guide circular arc.

[0028] Accordingly, the second aspect of the present application provides a trimming method, comprising:

[0029] The pre-pressed product is positioned;

[0030] Continuing to press the product down, the cutting part of the movable cutter moves outward and upward along the outer wall of the product and cuts off the waste material on the product when the cutting part contacts the waste material.

[0031] In an embodiment of the present application, the angle between the outer wall and the bottom surface of the product is 90.5°-91.5°; and / or in an embodiment of the present application, the junction of the outer wall and the bottom surface of the product is provided with a guide circular arc.

[0032] The present application has the following beneficial effects:

[0033] Different from the prior art, the present application provides a trimming die and a trimming method. The trimming die comprises: an upper die and a lower die; the bottom surface of the upper die is provided with a plurality of product pre-pressing blocks; the top surface of the lower die is provided with product fixing blocks corresponding to the product pre-pressing blocks one by one; the product fixing blocks are arranged on the lower die through elastic supporting members; at least one side of the product fixing blocks is provided with a movable cutter mechanism, which comprises a movable cutter. In other words, during the closing process of the upper die and the lower die, the product pre-pressing blocks first press the product down to the product fixing blocks for positioning, and then the product pre-pressing blocks continue to press down, and in the process of the product moving downward, the inclined outer wall of the product applies a lateral outward pushing force to the movable cutter, so that the cutting part of the movable cutter moves outward and upward along the outer wall of the product, and cuts off the waste material on the product when the cutting part contacts the waste material. The movable structure design function of the cutting edge can match multiple die casting die production products with a set of fine trimming die, reducing the development cost of the fine trimming die.

[0034] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and achieved by the structures particularly pointed out in the description and the appended drawings.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0037] Figure 1 is a schematic view of the trimming die of a preferred embodiment of the present application;

[0038] Figure 2 is a perspective view of the upper die of a preferred embodiment of the present application;

[0039] Figure 3 is a perspective view of the lower die of a preferred embodiment of the present application;

[0040] Figure 4 is a schematic view of the support plate of a preferred embodiment of the present application;

[0041] Figure 5 is a sectional view of the support plate of a preferred embodiment of the present application;

[0042] Figure 6 is a cutting schematic view of the movable cutter of a preferred embodiment of the present application;

[0043] Figure 7 is an assembly schematic view of the movable cutter mechanism of a preferred embodiment of the present application;

[0044] Figure 8 is a sectional view of the product of a preferred embodiment of the present application.

[0045] In the drawings:

[0046] product 100, guide circular arc 101, positioning groove 102, waste 200;

[0047] upper die 1, product pre-pressing block 11, upper die bottom plate 12, guide sleeve 121, lower die 2, product fixing block 21, second accommodating hole 211, profiling positioning block 212, elastic support 22, lower die bottom plate 23, guide column 231, support plate 24, first accommodating hole 241, movable cutter mechanism 3, movable cutter 31, longitudinal strip-shaped hole 311, fixing member 32, insertion end 321, head 322, elastic member 33, intermediate block 34, through hole 341, fixed cutter 4. DETAILED DESCRIPTION

[0048] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0049] The present application provides a trimming die, which will be described in detail below. It should be noted that the description order of the following embodiments is not used as a limitation on the preferred order of the embodiments of the present application. Moreover, the description of each embodiment in the following embodiments has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0050] Referring to Figures 1 to 6 In an embodiment, the trimming die comprises an upper die 1 and a lower die 2; the bottom surface of the upper die 1 is provided with a plurality of product pre-pressing blocks 11; the top surface of the lower die 2 is provided with product fixing blocks 21 corresponding to the product pre-pressing blocks 11 one by one; the product fixing blocks 21 are arranged on the lower die 2 through elastic supporting members 22; at least one side of the product fixing blocks 21 is provided with a movable cutter mechanism 3, which comprises a movable cutter 31; during the closing process of the upper die 1 and the lower die 2, the product pre-pressing blocks 11 first press the product 100 downward to the product fixing blocks 21 for positioning, and then the product pre-pressing blocks 11 continue to press downward, in the process of the downward movement of the product 100, the inclined outer wall of the product 100 applies an outward lateral thrust to the movable cutter 31, so that the cutting part of the movable cutter 31 moves outward and upward along the outer wall of the product 100, and the cutting part cuts off the waste 200 on the product 100 when the cutting part contacts the waste 200.

[0051] In some application scenarios, the product 100 has a certain draft angle. For example, referring to Figure 8 , the outer wall of the product 100 is outwardly inclined, and the included angle A between the outer wall and the bottom surface is an obtuse angle. Optionally, the size of A can be 90.5°-91.5°, for example, it can be 90.5°, 91°, 91.2°, 91.5°, etc. The interference between the inclined outer wall of the product 100 and the blade edge of the movable cutter 31 can make the blade edge of the movable cutter 31 always move along the outer wall of the product 100 when the product 100 moves downward; until the blade edge contacts the waste 200, the waste 200 protrudes from the outer wall of the product 100, and because the product 100 is still descending, the interference of the waste 200 to the blade edge of the movable cutter 31 is large, and the movable cutter 31 can smoothly cut off the waste 200.

[0052] Referring to Figure 4 and Figure 5Optionally, the lower die 2 comprises a lower die base plate 23, a plurality of support plates 24 installed on the lower die base plate 23, and a plurality of first accommodating holes 241 provided on the support plates 24 for accommodating lower ends of the elastic supports 22; the product fixing block 21 is arranged on an upper surface of the support plate 24, and a lower surface of the product fixing block 21 is provided with a plurality of second accommodating holes 211 for accommodating upper ends of the elastic supports 22.

[0053] In the embodiment, before the mold is closed, the elastic supports 22 can be springs, which can support the product fixing block 21 away from the surface of the support plate 24; when the mold is closed, the product pre-pressing block 11 first presses the product 100 downward to the product fixing block 21 for positioning, then the product pre-pressing block 11 continues to press downward against the elastic force of the elastic supports 22, and the product 100 continues to drop to cooperate with the movable cutter 31. The product fixing block 21 and the support plate 24 can also be cooperated through a guide rod, so that the product fixing block 21 does not laterally displace when moving up and down, and always maintains perpendicularity.

[0054] Specifically, referring to Figure 4 , Figure 5 and Figure 7 , the movable cutter mechanism 3 comprises a plurality of fixed members 32, the insertion ends 321 of which are fixed on the side walls of the product fixing block 21 through the movable cutter 31, a plurality of elastic members 33, each of which is sleeved on the corresponding fixed member 32, and one end of the elastic member 33 abuts against the movable cutter 31 and the other end abuts against the head 322 of the fixed member 32.

[0055] In the embodiment, the fixed member 32 can be a cup head screw, which comprises the insertion end 321 fixedly connected with the side wall of the product fixing block 21 and the head 322 with a diameter larger than that of the insertion end 321; the elastic member 33 can be a spring with a diameter smaller than that of the head 322; the elastic member 33 can be used to push the movable cutter 31, and the movable cutter 31 can move laterally along the rod of the fixing block 21.

[0056] In order to make the pressure of the elastic member 33 on the movable cutter 31 more balanced, the end of the elastic member 33 and the movable cutter 31 are provided with an intermediate block 34. That is, the elastic member 33 pushes the movable cutter 31 through the intermediate block 34.

[0057] Further, referring to Figure 5 and Figure 7 , the movable cutter 31 is provided with a longitudinal strip-shaped hole 311 through which the insertion end 321 of the fixed member 32 passes; the intermediate block 34 is provided with a through hole 341 through which the insertion end 321 of the fixed member 32 passes.

[0058] Since the insertion end 321 of the fixing member 32 is fixedly connected with the product fixing block 21, and the product fixing block 21 needs to move up and down, the longitudinal strip-shaped hole 311 can be used for the fixing member 32 to move up and down.

[0059] Referring to Figure 4 Optionally, the upper surface of the product fixing block 21 is provided with a plurality of profiled positioning blocks 212 matched with the positioning grooves 102 on the bottom surface of the product. The number of the profiled positioning blocks 212 can be multiple according to the up-down-left-right positioning requirements of the product 100, and the product can be fixed in principle; the profiled blocks are designed according to the surface shape of the product.

[0060] Referring to Figure 2 and Figure 3 Optionally, the upper die 1 comprises an upper die bottom plate 12; the product pre-pressing block 11 is arranged on the lower surface of the upper die bottom plate 12; a plurality of guide sleeves 121 are arranged on the upper die bottom plate 12; the guide sleeves 121 can be installed on the four corners of the upper die bottom plate 12; and the lower die bottom plate 23 is provided with guide columns 231 for inserting the corresponding guide sleeves 121.

[0061] Optionally, the circumferential side of the product fixing block 21 is further provided with a plurality of fixed cutters 4. The fixed cutters 4 can be arranged at positions with substantially unchanged dimensions of different models of the product 100.

[0062] Referring to Figure 8 Preferably, the product 100 is provided with a guide circular arc 101 at the junction of the outer wall and the bottom surface. The guide circular arc 101 can facilitate guiding the cutter of the movable cutter 31 to move onto the outer wall of the product 100.

[0063] On the basis of the above-mentioned embodiments, an embodiment of the present application provides a trimming method, which comprises: pre-pressing the product for positioning; continuously pressing the product, the cutting part of the movable cutter moves outward and upward along the outer wall of the product, and cuts off the waste on the product when the cutting part contacts the waste.

[0064] In one application scenario, in the embodiment, the lower die 2 as a whole can be fixed on the base of the oil press, and the upper die 1 as a whole can be installed on the movable side of the upper end of the oil press; when the upper die bottom plate 12 is pressed down, the product pre-pressing block 11 first contacts the product 100, pre-presses the product 100, and completely presses the product 100 into the profiling positioning block 212, so that the lower surface of the product 100 is tightly attached to the product fixing block 21; in the process of continuous pressing down of the upper die bottom plate 12, when the movable cutter 31 slightly interferes with the product 100, that is, the profile of the product 100 is slightly deformed, the movable cutter 31 is cut on the outer wall of the product 100; since the outer wall of the product is an inclined surface, when the product pre-pressing block 11 extrudes the product 100 downward, the profiling positioning block 212 fixes the product, and the product cannot shake left and right; at this time, the upper die bottom plate 12 continues to move downward, the inclined surface of the outer wall of the product extrudes the movable cutter 31 outward, the elastic member 33 is contracted, and when the movable cutter 31 is extruded to the upper edge of the product, since the lower surface of the waste 200 (such as a sprue and a slag ladle) is perpendicular to the punch cutter, when the upper die bottom plate 12 continues to move downward, the movable cutter 31 will not continue to move outward, but will punch the waste 200 outside the product; after the punching is completed, when the mold is opened, the upper die bottom plate 12 moves upward, the elastic supporting member 22 ejects the product fixing block 21, the elastic member 33 is ejected, and the movable cutter 31 is ejected back to the original position.

[0065] In summary, the trimming die of the present application can move the movable cutter outward when the movable cutter is subjected to a lateral force by increasing the movable cutter mechanism; after the force disappears, the elastic member ejects the movable cutter back to the original position, so as to change the position of the punch cutter. The design function of the movable cutter can satisfy that a set of fine trimming die matches multiple sets of die casting molds to produce products, reduces the development cost of the fine trimming die, maximally reduces the mold changing frequency, and greatly improves the production efficiency.

[0066] It should be noted that each device (parts without specific structure) selected in the present application is a general standard part or a part known to those skilled in the art, and its structure and principle can be known by the skilled person through a technical manual or through a conventional experimental method.

[0067] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected.

[0068] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0069] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined by the scope of the claims.

Claims

1. A trimming die characterized by comprising: The cutting edge mold comprises an upper mold (1) and a lower mold (2); The bottom surface of the upper mold (1) is provided with a plurality of product pre-pressing blocks (11); The top surface of the lower mold (2) is provided with product fixing blocks (21) corresponding to the product pre-pressing blocks (11); the product fixing blocks (21) are arranged on the lower mold (2) through elastic supports (22); at least one side of the product fixing blocks (21) is provided with a movable cutter mechanism (3) comprising movable cutters (31); During the closing process of the upper mold (1) and the lower mold (2), the product pre-pressing blocks (11) first press the product (100) downward to the product fixing blocks (21) for positioning, and then the product pre-pressing blocks (11) continue to press downward; during the downward movement of the product (100), the inclined outer wall of the product (100) applies an outward lateral thrust to the movable cutters (31), so that the cutting part of the movable cutters (31) moves outward and upward along the outer wall of the product (100), and cuts off the waste (200) on the product (100) when the cutting part contacts the waste (200). The lower mold (2) comprises: a lower mold bottom plate (23); a plurality of support plates (24) mounted on the lower mold bottom plate (23); and a plurality of first accommodating holes (241) for accommodating the lower ends of the elastic supports (22) are arranged on the support plates (24); the product fixing blocks (21) are arranged on the upper surfaces of the support plates (24), and the lower surfaces of the product fixing blocks (21) are provided with a plurality of second accommodating holes (211) for accommodating the upper ends of the elastic supports (22); the movable cutter mechanism (3) comprises: a plurality of fixing members (32), the insertion ends (321) of which pass through the movable cutters (31) and are fixed to the side walls of the product fixing blocks (21); a plurality of elastic members (33), each of which is sleeved on a corresponding fixing member (32); one end of each elastic member (33) abuts against the movable cutter (31), and the other end abuts against the head (322) of the fixing member (32); an intermediate block (34) is arranged between the end of the elastic member (33) and the movable cutter (31); the movable cutter (31) is provided with a longitudinal strip-shaped hole (311) through which the insertion end (321) of the fixing member (32) passes; the intermediate block (34) is provided with a through hole (341) through which the insertion end (321) of the fixing member (32) passes.

2. The cutting edge mold according to claim 1, wherein the upper surfaces of the product fixing blocks (21) are provided with a plurality of profiled positioning blocks (212) matched with the positioning grooves (102) on the bottom surface of the product.

3. The cutting edge mold according to claim 1, wherein the upper mold (1) comprises an upper mold bottom plate (12); the product pre-pressing blocks (11) are arranged on the lower surface of the upper mold bottom plate (12); a plurality of guide sleeves (121) are arranged on the upper mold bottom plate (12); a plurality of guide columns (231) for inserting the corresponding guide sleeves (121) are arranged on the lower mold bottom plate (23).

4. The cutting edge mold according to claim 1, wherein The product fixing block (21) is further provided with a plurality of fixed cutters (4) on the peripheral side.

5. A trimming method using the trimming die according to any one of claims 1 to 4, characterized by, Comprise: The pre-pressed product is positioned; The movable cutter continues to press the product downward, and the cutting part of the movable cutter moves outward and upward along the outer wall of the product, and cuts off the waste on the product when the cutting part contacts the waste.

6. The trimming method according to claim 5, characterized in that, The angle between the outer wall and the bottom surface of the product (100) is 90.5°-91.5°; and / or the intersection between the outer wall and the bottom surface of the product (100) is provided with a guide circular arc (101).

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