Trimming die and trimming method

Abstract

The invention belongs to the technical field of trimming dies for aluminum alloy die castings, and particularly relates to a trimming die and a trimming method. The trimming die comprises an upper die and a lower die, a plurality of product pre-pressing blocks are arranged on the bottom surface of the upper die; product fixing blocks corresponding to the product pre-pressing blocks one to one are arranged on the top face of the lower die. The product fixing block is arranged on the lower die through an elastic supporting piece. A movable cutter mechanism is arranged on at least one side of the product fixing block and comprises a movable cutter. In other words, in the mold closing process of the upper mold and the lower mold, the product pre-pressing block firstly presses the product downwards to the product fixing block to be positioned, then the product pre-pressing block continues to press downwards, the inclined outer wall of the product exerts outward lateral thrust on the movable cutter in the downward moving process of the product, and the movable cutter moves downwards. And the cutting part of the movable cutter moves outwards and upwards along the outer wall of the product, and the waste is cut off when the cutting part makes contact with the waste on the product. The design function of the movable structure of the knife edge can meet the requirement that one precise trimming die is matched with multiple die-casting dies to produce products, and the development cost of the precise trimming die is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of trimming dies for aluminum alloy die castings, and in particular relates to a trimming die and a trimming method. Background Art

[0002] The die casting of the whole mold includes runners, products, slag bags, and flash burrs. In order to obtain the formed products, the remaining aluminum materials need to be cut off using a trimming die. The trimming die is a mold used to remove excess waste materials such as runners, slag bags, and flash burrs.

[0003] Usually, when producing small batches of products, operators will manually knock off the excess parts on the die castings, but the fractures at the gate and slag ladle are extremely uneven, and it is difficult for operators to remove them all. At the same time, in large-scale production, it is inefficient to remove the excess parts by manual knocking. Compared with thin-walled castings, manual knocking will also cause product deformation and collapse, affecting product quality.

[0004] At present, the traditional approach is to design trimming dies to improve efficiency and product quality. Most trimming dies are now designed as one set of product dies corresponding to one precision trimming die. However, the same product is produced by many sets of dies. Due to the differences in product details, burrs, product size tolerances, and contours produced by each set of dies, it is necessary to redesign the punch, adjust the position of the punch, or redesign a new set of dies. While wasting time, it also increases the development cost of precision trimming dies. Summary of the invention

[0005] The object of the present invention is to provide a trimming die and a trimming method, which can trim castings of similar structures without changing the punch, so as to reduce the cost and time of reopening the trimming die.

[0006] A 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 mold is provided with a plurality of product pre-pressing blocks;

[0008] The top surface of the lower mold is provided with a product fixing block corresponding to the product pre-pressing block one by one; the product fixing block is arranged on the lower mold through an elastic support member; at least one side of the product fixing block is provided with a movable cutter mechanism, which includes a movable cutter;

[0009] During the closing process of the upper and lower molds, the product pre-pressing block first presses the product down onto the product fixing block for positioning, and then the product pre-pressing block continues to press down. During the downward movement of the product, its inclined outer wall applies an outward lateral thrust to the movable cutter, so that the cutting portion 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 portion contacts it.

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

[0011] Lower mold base plate;

[0012] A plurality of support plates are mounted on the bottom plate of the lower mold; and the support plates are provided with a plurality of first receiving holes for receiving the lower ends of the elastic support members;

[0013] The product fixing block is arranged on the upper surface of the support plate, and a plurality of second accommodating holes for accommodating the upper ends of the elastic supporting members are arranged on the lower surface of the product fixing block.

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

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

[0016] A plurality of elastic members are sleeved on the corresponding fixing members one by one; one end of the elastic member abuts against the movable cutter, and the other end abuts against the head of the fixing member.

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

[0018] In one embodiment of the present application, the movable cutter is provided with a longitudinal strip hole for the insertion end of the fixing member to pass through;

[0019] The middle block is provided with a through hole for the insertion end of the fixing piece to pass through.

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

[0021] In one embodiment of the present application, the upper mold includes an upper mold bottom plate;

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

[0023] A plurality of guide sleeves are arranged on the upper mold bottom plate;

[0024] The bottom plate of the lower die is provided with a guide column for inserting a corresponding guide sleeve.

[0025] In one embodiment of the present application, a plurality of fixed cutters are further provided on the peripheral side of the product fixing block.

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

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

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

[0029] Pre-press products for positioning;

[0030] The product is continuously pressed down, and the cutting portion 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 portion contacts the waste material.

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

[0032] The beneficial effects of the present invention are:

[0033] Different from the prior art, the present application provides a trimming die and a trimming method. The trimming die includes: 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 a product fixing block corresponding to the product pre-pressing blocks one by one; the product fixing block is arranged on the lower die through an elastic support member; at least one side of the product fixing block is provided with a movable cutter mechanism, which includes a movable cutter. In other words, during the closing process of the upper die and the lower die, the product pre-pressing block first presses the product down onto the product fixing block for positioning, and then the product pre-pressing block continues to press down, and during the downward movement of the product, its inclined outer wall 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 material on the product when the cutting part contacts it. The movable structural design function of the blade can meet the requirements of matching a set of precision trimming dies with multiple sets of die-casting dies to produce products, thereby reducing the development cost of precision trimming dies.

[0034] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 is a schematic diagram of a trimming die according to a preferred embodiment of the present invention;

[0038] Figure 2 is a three-dimensional diagram of an upper mold of a preferred embodiment of the present invention;

[0039] Figure 3 is a three-dimensional diagram of a lower mold of a preferred embodiment of the present invention;

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

[0041] Figure 5 is a cross-sectional view of a support plate according to a preferred embodiment of the present invention;

[0042] Figure 6 is a cutting schematic diagram of a movable cutter according to a preferred embodiment of the present invention;

[0043] Figure 7 is a schematic assembly diagram of a mobile cutter mechanism of a preferred embodiment of the present invention;

[0044] Figure 8 It is a cross-sectional view of a product of a preferred embodiment of the present invention.

[0045] In the figure:

[0046] Product 100, guide arc 101, positioning groove 102, waste material 200;

[0047] Upper mold 1, product pre-pressing block 11, upper mold base plate 12, guide sleeve 121, lower mold 2, product fixing block 21, second accommodating hole 211, contour positioning block 212, elastic support member 22, lower mold base plate 23, guide column 231, support plate 24, first accommodating hole 241, movable cutter mechanism 3, movable cutter 31, longitudinal strip 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 purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The present application provides a trimming die, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0050] See also Figures 1 to 6 In one embodiment, the trimming die includes an upper die 1 and a lower die 2; a plurality of product pre-pressing blocks 11 are arranged on the bottom surface of the upper die 1; a product fixing block 21 corresponding to the product pre-pressing blocks 11 is arranged on the top surface of the lower die 2; the product fixing block 21 is arranged on the lower die 2 through an elastic support member 22; a movable cutter mechanism 3 is arranged on at least one side of the product fixing block 21, which includes a movable cutter 31; during the clamping process of the upper die 1 and the lower die 2, the product pre-pressing block 11 first presses the product 100 down onto the product fixing block 21 for positioning, and then the product pre-pressing block 11 continues to press down, and during the downward movement of the product 100, its inclined outer wall applies an outward lateral thrust to the movable cutter 31, so that the cutting portion of the movable cutter 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 portion contacts it.

[0051] In some application scenarios, the product 100 has a certain draft angle. For example, see Figure 8 , the outer wall of the product 100 is inclined outward, and the angle A between the outer wall and the bottom surface is an obtuse angle. Optionally, the size of A can be 90.5° to 91.5°, for example, it can be 90.5°, 91°, 91.2°, 91.5 degrees, etc. The inclined outer wall of the product 100 slightly interferes with the edge of the movable cutter 31, so that when the product 100 moves downward, the edge of the movable cutter 31 always moves along the outer wall of the product 100; until the edge of the cutter 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 waste 200 interferes more with the edge of the movable cutter 31, and the movable cutter 31 can smoothly cut off the waste 200.

[0052] See also Figure 4 and Figure 5Optionally, the lower mold 2 includes: a lower mold bottom plate 23; a plurality of support plates 24, which are installed on the lower mold bottom plate 23; and the support plate 24 is provided with a plurality of first accommodating holes 241 for accommodating the lower end of the elastic support member 22; the product fixing block 21 is arranged on the upper surface of the support plate 24, and the lower surface of the product fixing block 21 is provided with a plurality of second accommodating holes 211 for accommodating the upper end of the elastic support member 22.

[0053] In this embodiment, before the mold is closed, the elastic support member 22 may be a spring, which can support the product fixing block 21 from the surface of the support plate 24; so that when the mold is closed, the product pre-pressing block 11 first presses the product 100 down onto the product fixing block 21 for positioning, and then the product pre-pressing block 11 continues to press down to overcome the elastic force of the elastic support member 22, and the product 100 continues to descend and cooperate with the movable cutter 31. The product fixing block 21 and the support plate 24 may also cooperate through a guide rod, so that the product fixing block 21 will not be displaced laterally when moving up and down, and always maintains verticality.

[0054] For details, see Figure 4 , Figure 5 and Figure 7 The movable cutter mechanism 3 includes: a plurality of fixing members 32, whose insertion ends 321 pass through the movable cutter 31 and are fixed on the side wall of the product fixing block 21; a plurality of elastic members 33, which are sleeved on the corresponding fixing members 32 one by one; 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 fixing member 32.

[0055] In this embodiment, the fixing member 32 can be a cup head screw, which includes an insertion end 321 fixedly connected to the side wall of the product fixing block 21 and a head 322 whose diameter is larger than the insertion end 321; the elastic member 33 can be a spring whose diameter is smaller than the diameter 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 portion of the fixing block 21.

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

[0057] For further information, see Figure 5 and Figure 7 The movable cutter 31 is provided with a longitudinal strip hole 311 for the insertion end 321 of the fixing member 32 to pass through; the intermediate block 34 is provided with a through hole 341 for the insertion end 321 of the fixing member 32 to pass through.

[0058] Since the insertion end 321 of the fixing member 32 is fixedly connected to the product fixing block 21 and the product fixing block 21 needs to move up and down, the longitudinal strip hole 311 can allow the fixing member 32 to move up and down therein.

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

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

[0061] Optionally, a plurality of fixed cutters 4 are further provided on the peripheral side of the product fixing block 21. The fixed cutters 4 can be provided at positions where the sizes of products 100 of different models remain substantially unchanged.

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

[0063] Based on the above embodiments, an embodiment of the present application provides a trimming method, including: pre-pressing the product for positioning; 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 it.

[0064] In one application scenario, in this embodiment, the lower mold 2 can be fixed on the base of the hydraulic press as a whole, and the upper mold 1 can be installed on the movable side of the upper end of the hydraulic press as a whole; when the upper mold 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 contour positioning block 212, and the lower surface of the product 100 is tightly fitted with the product fixing block 21; in the process of the upper mold bottom plate 12 continuing to press down, due to the slight interference between the movable cutter 31 and the product 100, that is, when the outer contour of the product 100 is slightly deformed, the movable cutter 31 cuts on the outer wall of the product 100, and since the outer wall of the product is an inclined surface, when the product pre-pressing block 11 is squeezed downward When pressing the product 100, the contoured positioning block 212 fixes the product and the product does not shake back and forth or left and right. At this time, the upper mold base plate 12 continues to move downward, and the outer wall slope of the product squeezes the movable cutter 31 outward, and the elastic member 33 contracts. When the movable cutter 31 is squeezed to the upper edge of the product, since the lower surface of the waste material 200 (such as the gate, the slag bag mouth) is perpendicular to the punch, when the upper mold base plate 12 continues to move downward, the movable cutter 31 will not continue to move outward, but will punch and cut the waste material 200 outside the product; when the punching is completed and the mold is opened, the upper mold base plate 12 moves upward, the elastic support member 22 pushes out the product fixing block 21, and the elastic member 33 pops out to bounce the movable cutter 31 back to its original position.

[0065] In summary, the trimming die of the present invention adds a movable cutter mechanism, and the movable cutter can move outward when subjected to lateral force; after the force disappears, the elastic member rebounds the movable cutter back to its original position, thereby changing the position of the punch. The design function of the movable cutter can meet the requirements of matching a set of precision trimming dies with multiple sets of die-casting dies to produce products, reduce the development cost of precision trimming dies, minimize the frequency of mold changes, and greatly improve production efficiency.

[0066] It should be noted that the various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0067] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0068] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0069] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A trimming die, characterized in that: It comprises an upper die (1) and a lower die (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 a product fixing block (21) corresponding to the product pre-pressing block (11) one by one; the product fixing block (21) is arranged on the lower mold (2) through an elastic support member (22); at least one side of the product fixing block (21) is provided with a movable cutter mechanism (3), which includes a movable cutter (31); During the closing process of the upper mold (1) and the lower mold (2), the product pre-pressing block (11) first presses the product (100) downward onto the product fixing block (21) for positioning, and then the product pre-pressing block (11) continues to press downward. During the downward movement of the product (100), its inclined outer wall applies an outward lateral thrust to the movable cutter (31), so that the cutting portion of the movable cutter (31) moves outward and upward along the outer wall of the product (100), and cuts off the waste material (200) on the product (100) when the cutting portion contacts the waste material (200).

2. The trimming die according to claim 1, characterized in that: The lower mold (2) comprises: Lower mold base plate (23); A plurality of support plates (24) are mounted on the lower mold bottom plate (23); and the support plates (24) are provided with a plurality of first receiving holes (241) for receiving the lower ends of the elastic support members (22); The product fixing block (21) is arranged on the upper surface of the support plate (24), and the lower surface of the product fixing block (21) is provided with a plurality of second accommodating holes (211) for accommodating the upper ends of the elastic supporting members (22).

3. The trimming die according to claim 1, characterized in that: The movable cutter mechanism (3) comprises: A plurality of fixing members (32), the insertion ends (321) of which pass through the movable cutter (31) and are fixed on the side wall of the product fixing block (21); A plurality of elastic members (33) are mounted one by one on the corresponding fixing members (32); one end of the elastic member (33) abuts against the movable cutter (31), and the other end abuts against the head (322) of the fixing member (32).

4. The trimming die according to claim 3, characterized in that: An intermediate block (34) is provided between the end of the elastic member (33) and the movable cutter (31).

5. The trimming die according to claim 4, characterized in that: The movable cutter (31) is provided with a longitudinal strip hole (311) for the insertion end (321) of the fixing member (32) to pass through; The middle block (34) is provided with a through hole (341) for the insertion end (321) of the fixing member (32) to pass through.

6. The trimming die according to claim 1, characterized in that: The upper surface of the product fixing block (21) is provided with a plurality of contoured positioning blocks (212) matching the positioning grooves (102) on the bottom surface of the product.

7. The trimming die according to claim 1, characterized in that: The upper mold (1) comprises an upper mold bottom plate (12); The product pre-pressing block (11) is 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); The lower die bottom plate (23) is provided with a guide column (231) for inserting a corresponding guide sleeve (121).

8. The trimming die according to claim 1, characterized in that: A plurality of fixed cutters (4) are also provided on the peripheral side of the product fixing block (21).

9. A trimming method, characterized in that: include: Pre-press products for positioning; The product is continuously pressed down, and the cutting portion 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 portion contacts the waste material.

10. The trimming method according to claim 9, characterized in that: The angle between the outer wall and the bottom surface of the product (100) is 90.5° to 91.5°; and / or A guide arc (101) is provided at the junction between the outer wall and the bottom surface of the product (100).

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