A mold structure for forming in a narrow space and its usage method

Abstract

The invention discloses a die structure for forming in a narrow space, comprising an inclined wedge punch, a forming insert driven by the inclined wedge punch, a forming punch and a lower die insert matched with the forming punch, wherein an inclined wedge-shaped groove is formed on one side of the inclined wedge punch, and a limiting groove is formed on the upper part of the other side; a stamping groove matched with the inner side of the gap of the product is symmetrically formed on the side of the forming insert, the lower part of the forming insert is connected with a discharge bolt, and a return spring is provided on the discharge bolt to push the forming insert into the gap of the product and contact the inner side of the gap of the product; the forming punch is located on both sides of the forming insert to realize the extrusion of the product when the forming punch is running. The forming insert is matched with the gap of the product, and the forming insert is pushed into the gap of the product under the drive of the inclined wedge punch, and the product is extruded under the action of the forming punch so that the product and the forming insert interact with each other to realize the forming of the narrow space of the product.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a mold structure for forming in a narrow space and a use method thereof. Background Art

[0002] The mold has a specific contour or inner cavity shape. The use of a contour shape with a cutting edge can make the blank separate (punch out) according to the contour shape. The use of the inner cavity shape can make the blank obtain a corresponding three-dimensional shape. The use of the inner cavity shape can make the blank obtain a corresponding three-dimensional shape. The mold generally consists of two parts: a movable mold and a fixed mold (or a concave mold and a convex mold), which can be separated or combined. When separated, the workpiece is taken out, and when closed, the blank is injected into the mold cavity for molding. The mold is a precision tool with a complex shape. It bears the expansion force of the blank and has high requirements for structural strength, rigidity, surface hardness, surface roughness and processing accuracy.

[0003] Since some parts are very small, it is very difficult to process and shape such parts in a small space, and there is no space in the mold to design side-push molding inserts, and the parts cannot be molded by mold movement.

[0004] Therefore, it is urgent to design a molding die for use in a narrow space that can solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a forming die for use in a narrow space which has a simple structure, is easy to operate, can perform side forming processing on small-sized parts, and has high production efficiency.

[0006] The technical solution of the present invention is as follows:

[0007] A die structure for forming in a narrow space, comprising an inclined wedge punch, a forming insert driven by the inclined wedge punch, the forming punch and a lower die insert matched with the forming punch, wherein the inclined wedge punch and the forming punch are arranged in an upper die, and the forming insert and the lower die insert are arranged in a lower die corresponding to the upper die;

[0008] An oblique wedge-shaped groove is formed on one side of the oblique wedge punch, and a limiting groove is formed on the upper part of the other side to limit the stroke of the oblique wedge punch;

[0009] The molding insert is slidably installed in the lower die, the molding insert is located below the inclined wedge punch, a top surface on one side of the molding insert is formed with an inclined wedge-shaped top surface, and the inclined wedge-shaped top surface matches the inclined wedge-shaped groove of the inclined wedge punch, and the side surface of the molding insert is symmetrically formed with a stamping groove that matches the inner side surface of the gap of the product, the lower part of the molding insert is connected to the unloading bolt, and a return spring is provided on the unloading bolt to push the molding insert into the gap of the product and contact the inner side surface of the gap of the product under the push of the inclined wedge punch;

[0010] The forming punch is located on both sides of the forming insert, and a forming inclined surface is formed at the stamping end of the forming punch;

[0011] The lower die insert is located below the forming punch, and a driving inclined surface that cooperates with the forming inclined surface of the forming punch is formed on the upper end surface of the lower die insert to be used for extruding the product when the forming punch runs.

[0012] In the above technical solution, 2 stamping grooves are symmetrically formed on the side surface of the forming insert. An insertion block is formed between the 2 stamping grooves, and the insertion block cooperates with the gap of the product so that the insertion block is pushed into the inner side surface of the product to form the inner side surface of the product.

[0013] In the above technical solution, the bottom of the stamping groove of the forming insert is arc-shaped.

[0014] In the above technical solution, the forming punch includes a first forming punch and a second forming punch. The first forming punch and the second forming punch are symmetrically arranged on both sides of the forming insert. The driving inclined surfaces formed on the upper end surface of the lower die insert respectively cooperate with the forming inclined surfaces of the first forming punch and the second forming punch, and are used for generating a lateral movement under the action of the lower die insert when the forming punch runs to extrude the product.

[0015] In the above technical solution, the length of the wedge punch is greater than the length of the forming punch, and the length difference between the wedge punch and the forming punch is 9 - 10 mm.

[0016] In the above technical solution, the movement stroke of the forming insert is 3 - 3.5 mm.

[0017] In the above technical solution, the upper die includes an upper cover plate, an upper die base, an upper backing plate, a fixing plate, a stripper backing plate and a stripper plate which are arranged in sequence from top to bottom. The upper die base, the upper backing plate, the fixing plate, the stripper backing plate and the stripper plate are fixed on the upper die base through fastening bolts. A spring is arranged at the top of the fastening bolt. The wedge punch and the forming punch are arranged in the fixing plate. A limit bolt is arranged between the fixing plate and the stripper backing plate, and the limit bolt cooperates with the limit groove of the wedge punch to be used for limiting the stroke of the wedge punch.

[0018] In the above technical solution, the lower die sequentially includes a lower template, a lower backing plate, and a lower die base from top to bottom. A lower die groove and a forming chute are formed in the lower template. The lower die insert is disposed in the lower die groove, and the forming insert is slidably installed in the forming groove. When the wedge punch runs, the forming insert is pushed into the gap between the forming insert and the product, and under the action of the forming punch, the product is extruded so that the forming insert and the inner side surface of the product are extruded and formed. A positioning block is provided on the forming insert to position the stroke of the movement of the forming insert.

[0019] In the above technical solution, the unloading bolt is installed in the lower template.

[0020] In the above technical solution, a pressing block is provided on the unloading plate. The pressing block is located above the forming insert and is used to press the forming insert away from the forming chute.

[0021] Another object of the present invention is to provide a method of using the mold structure, including the following steps:

[0022] (1) In the initial state, the upper die and the lower die are separated. The product to be processed is placed in the mold, and the product to be processed is pressed by the unloading plate and the lower template.

[0023] (2) The mold moves downward. The wedge punch extrudes the forming insert. Under the action of the unloading bolt, the forming insert is pushed into the gap between the product, and the stamping groove of the forming insert contacts the inner side surface of the product.

[0024] (3) The mold continues to move downward. The forming punch extrudes the driving inclined surface of the lower die insert, so that the forming punch generates a lateral movement force to extrude the product, so that the forming insert and the product are extruded to complete the forming of the inner side surface of the product.

[0025] (4) Driven by the mold, the wedge punch and the forming punch return to the initial state, and the processed and formed product is taken out.

[0026] The advantages and positive effects of the present invention are:

[0027] 1. There is no space in the original mold to realize the forming insert of the side push. The forming insert designed in the present invention is matched with the gap between the forming insert and the product. Driven by the wedge punch, the forming insert is pushed into the gap between the product, and under the action of the forming punch, the product is extruded so that the product and the forming insert interact with each other to realize the forming of the narrow space of the product.

[0028] 2. The two forming punches symmetrically arranged on both sides of the forming insert of the present invention act on both sides of the forming insert respectively during operation to generate the same extrusion force on the product, so as to ensure that the inner side surface of the product is extruded and formed identically.

[0029] 3. The pressure block set above the forming insert plays a role of positioning and pressing during the sliding process of the forming insert, preventing the forming insert from moving out of the chute and improving the pushing accuracy of the forming insert. Brief Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the initial state of the mold structure of the present invention;

[0031] Figure 2 is a side view of the initial state of the mold structure of the present invention;

[0032] Figure 3 is a top view of the initial state of the mold structure of the present invention;

[0033] Figure 4 is a partially enlarged view of the initial state of the forming punch in the present invention;

[0034] Figure 5 is a schematic structural diagram of the use state of the forming mold of the present invention;

[0035] Figure 6 is Figure 4 the side view of the use state of

[0036] Figure 7 is Figure 4 the partially enlarged view of the forming punch in

[0037] Figure 8 is a schematic structural diagram of the product in the present invention;

[0038] Figure 9 is a schematic structural diagram of the forming insert in the present invention;

[0039] Figure 10 is Figure 9 the side view of

[0040] Figure 11 is a schematic structural diagram of the angled wedge punch in the present invention;

[0041] Figure 12 is a schematic structural diagram of the forming punch in the present invention.

[0042] In the figure:

[0043] 1. Upper cover plate, 2. Upper die base, 3. Upper backing plate

[0044] 4. Fixed plate, 5. Stripping backing plate, 6. Stripping plate

[0045] 7. Lower template, 8. Lower backing plate, 9. Lower die base

[0046] 10. First forming punch, 11. Second forming punch, 12. First lower die insert

[0047] 13. Second lower die insert, 14. Wedge punch, 15. Forming insert

[0048] 16. Spring, 17. Stripping bolt, 18. Product

[0049] 19. Pressure block, 20. Fastening bolt, 21. Positioning block

[0050] 22. Return spring, 23. Limit bolt, 24. Stamping groove

[0051] 25. Wedge-shaped top surface, 26. Wedge-shaped groove, 27. Limit groove

[0052] 28. Forming inclined surface Detailed implementation mode

[0053] The present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, and in no way limit the protection scope of the present invention.

[0054] Embodiment 1

[0055] As shown in the figure, the mold structure for forming in a narrow space of the present invention includes a wedge punch 14, a forming insert 15 driven by the wedge punch 14, a forming punch and a lower die insert cooperating with the forming punch. The wedge punch 14 and the forming punch are arranged in the upper die, and the forming insert 15 and the lower die insert are arranged in the lower die corresponding to the upper die;

[0056] A wedge-shaped groove 26 is formed on one side of the wedge punch 14, and a limit groove 27 is formed on the upper part of the other side to limit the stroke of the wedge punch 14.

[0057] The forming insert 15 is slidably installed in the lower die. The forming insert 15 is located below the wedge punch 14. A wedge-shaped top surface 25 is formed on one side top surface of the forming insert 15, and the wedge-shaped top surface 25 cooperates with the wedge-shaped groove 26 of the wedge punch 14. Stamping grooves 24 cooperating with the inner side surface of the gap of the product 18 are symmetrically formed on the side surface of the forming insert 15. The lower part of the forming insert 15 is connected to the stripping bolt 17, and a return spring 22 is arranged on the stripping bolt 17 to push the forming insert 15 into the gap of the product 18 and contact the inner side surface of the gap of the product 18 under the extrusion of the wedge punch 14.

[0058] The forming punch is located on both sides of the forming insert 15. The forming punch includes a first forming punch 10 and a second forming punch 11. The first forming punch 10 and the second forming punch 11 are symmetrically arranged on both sides of the forming insert 15, and the stamping ends of the two forming punches are both formed with a forming inclined surface 28.

[0059] The lower die insert is located below the forming punch. The lower die insert includes a first lower die insert 12 and a second lower die insert 13, and driving inclined surfaces are formed on the upper end surfaces of the first lower die insert 12 and the second lower die insert 13. The driving inclined surface of the first lower die insert 12 is matched with the forming inclined surface 28 of the first forming punch 10, and the driving inclined surface of the second lower die insert 13 is matched with the forming inclined surface 28 of the second forming punch 11. When the forming punch runs, it moves along the inclined surface of the lower die insert to realize the extrusion of the product 18.

[0060] Further, the included angle between the driving inclined surface of the lower die insert and the horizontal plane is 60°, and the included angle between the forming inclined surface 28 of the forming punch and the horizontal plane is 30°.

[0061] Further, two stamping grooves 24 are symmetrically formed on the side surface of the forming insert 15. An insertion block is formed between the two stamping grooves 24, and the insertion block is matched with the gap of the product 18 so that the insertion block is pushed into the inner side surface of the product 18 to form the inner side surface of the product 18.

[0062] Further, when processing the product 18 as Figure 8 shown, the gap formed at the front end of the product 18 is 0.5 mm, and the design requirement of the product 18 is to process the inner side surface of the gap into a fillet with a radius of R2; the stamping groove 24 of the forming insert 15 is matched with the inner side surface of the gap of the product 18. The bottom of the stamping groove 24 of the forming insert 15 is in an arc shape with a radius of R1.8, and arc shapes with a radius of 4-R0.2 are formed on both sides of the top of the stamping groove 24.

[0063] Further, the included angle between the inclined wedge top surface 25 of the forming insert 15 and the horizontal plane is 45°, and the included angle between the inclined surface of the inclined wedge groove 26 of the inclined wedge punch 14 and the horizontal plane is 45°.

[0064] Further, the length of the inclined wedge punch 14 is greater than the length of the forming punch, and the length difference between the inclined wedge punch 14 and the forming punch is 10 mm; the moving stroke of the forming insert 15 is 3 mm.

[0065] Embodiment 2

[0066] On the basis of Embodiment 1, the die structure of Embodiment 1 is applied in a die, and the die includes an upper die and a lower die corresponding to the upper die;

[0067] The upper die includes an upper cover plate 1, an upper die base 2, an upper backing plate 3, a fixing plate 4, a stripper backing plate 5, and a stripper plate 6 that are sequentially arranged from top to bottom. The upper die base 2, the upper backing plate 3, the fixing plate 4, the stripper backing plate 5, and the stripper plate 6 are fixed on the upper die base 2 by fastening bolts 20. A spring 16 is provided at the top of the fastening bolt 20. The wedge punch 14 and the forming punch are arranged in the fixing plate 4. A limit bolt 23 is provided between the fixing plate 4 and the stripper backing plate 5, and the limit bolt 23 cooperates with the limit groove 27 of the wedge punch 14 to limit the stroke of the wedge punch 14.

[0068] Further, the lower die sequentially includes a lower template 7, a lower backing plate 8, and a lower die base 9 from top to bottom. A lower die groove and a forming chute are formed in the lower template 7. The lower die insert is arranged in the lower die groove. The forming insert 15 is slidably installed in the forming groove. When the wedge punch 14 operates, the forming insert 15 is pushed into the gap between the forming insert 15 and the product 18, and under the action of the forming punch, the product 18 is extruded so that the inner side surface of the forming insert 15 and the product 18 are extrusion formed. A positioning block 21 is provided on the forming insert 15 to position the stroke of the movement of the forming insert 15.

[0069] Further, the stripper bolt 17 is installed in the lower template 7.

[0070] Further, a pressure block 19 is provided on the stripper plate 6. The pressure block 19 is located above the forming insert 15 and is used to press the forming insert 15 away from the forming chute.

[0071] Embodiment 3

[0072] Based on Embodiment 2, the usage method of the mold structure of the present invention includes the following steps:

[0073] (1) In the initial state, the upper die and the lower die are separated. The product 18 to be processed is placed in the mold, and the product 18 to be processed is pressed by the stripper plate 6 and the lower template 7.

[0074] (2) The mold moves downward. The wedge punch 14 extrudes the forming insert 15. Under the action of the stripper bolt 17, the forming insert 15 is pushed into the gap of the product 18, and the stamping groove 24 of the forming insert 15 contacts the inner side surface of the product 18.

[0075] (3) The mold continues to move downward. The forming punch extrudes the driving inclined surface of the lower die insert, so that the forming punch generates a force for lateral movement to extrude the product 18, and the forming insert 15 and the product 18 are extruded to complete the forming of the inner side surface of the product 18.

[0076] (4) Driven by the mold, the angled wedge punch 14 and the forming punch return to their initial states, and the processed and formed product 18 is taken out.

[0077] For ease of explanation, in the embodiments, spatial relative terms such as "upper", "lower", "left", and "right" are used to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figures is inverted, the element described as being "below" other elements or features will be positioned "above" the other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein can be interpreted accordingly.

[0078] Moreover, relative relationship terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0079] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification, or equivalent replacement that can be made by those skilled in the art without creative efforts falls within the protection scope of the present invention.

Claims

1. A mold structure for forming in a narrow space, characterized in that: It includes an inclined wedge punch, a forming insert driven by the inclined wedge punch, a forming punch and a lower die insert matched with the forming punch, wherein the inclined wedge punch and the forming punch are arranged in an upper die, and the forming insert and the lower die insert are arranged in a lower die corresponding to the upper die; An oblique wedge-shaped groove is formed on one side of the oblique wedge punch, and a limiting groove is formed on the upper part of the other side to limit the stroke of the oblique wedge punch; The molding insert is slidably installed in the lower die, the molding insert is located below the inclined wedge punch, a top surface on one side of the molding insert is formed with an inclined wedge-shaped top surface, and the inclined wedge-shaped top surface matches the inclined wedge-shaped groove of the inclined wedge punch, and the side surface of the molding insert is symmetrically formed with a stamping groove that matches the inner side surface of the gap of the product, the lower part of the molding insert is connected to the unloading bolt, and a return spring is provided on the unloading bolt to push the molding insert into the gap of the product and contact the inner side surface of the gap of the product under the push of the inclined wedge punch; The forming punch is located on both sides of the forming insert, and the punching end of the forming punch is formed with a forming inclined surface; The lower die insert is located below the forming punch, and the upper end surface of the lower die insert is formed with a driving inclined surface that matches the forming inclined surface of the forming punch so as to realize extrusion of the product when the forming punch is in operation.

2. The mold structure according to claim 1, wherein: Two stamping grooves are symmetrically formed on the side of the molding insert, an insertion block is formed between the two stamping grooves, and the insertion block cooperates with the gap of the product so that the insertion block is pushed into the inner side of the product to mold the inner side of the product.

3. The mold structure according to claim 2, characterized in that: The bottom of the punching groove of the molding insert is in an arc shape.

4. The mold structure according to claim 3, characterized in that: The forming punch includes a first forming punch and a second forming punch, and the first forming punch and the second forming punch are symmetrically arranged on both sides of the forming insert. The driving inclined surface formed on the upper end surface of the lower die insert respectively cooperates with the forming inclined surface of the first forming punch and the forming inclined surface of the second forming punch, so as to extrude the product by moving sideways under the action of the lower die insert when the forming punch is running.

5. The mold structure according to claim 4, characterized in that: The length of the inclined wedge punch is greater than the length of the forming punch, and the length difference between the inclined wedge punch and the forming punch is 9-10 mm.

6. The mold structure according to claim 5, characterized in that: The movement stroke of the molding insert is 3-3.5 mm.

7. The mold structure according to claim 6, wherein: The upper die comprises an upper cover plate, an upper die seat, an upper pad, a fixed plate, a discharge pad and a discharge plate, which are arranged in sequence from top to bottom. The upper die seat, the upper pad, the fixed plate, the discharge pad and the discharge plate are fixed to the upper die seat by fastening bolts. A spring is provided on the top of the fastening bolt. The wedge punch and The forming punch is arranged in the fixing plate, and a limiting bolt is arranged between the fixing plate and the unloading pad, and the limiting bolt cooperates with the limiting groove of the inclined wedge punch to limit the stroke of the inclined wedge punch.

8. The mold structure according to claim 7, characterized in that: The lower die includes a lower mold plate, a lower pad and a lower mold base from top to bottom. A lower mold groove and a molding slide groove are formed in the lower mold plate. The lower die insert is arranged in the lower mold groove. The molding insert is slidably installed in the molding slide groove. When the inclined wedge punch is running, the molding insert is moved into the gap of the product, and the product is squeezed under the action of the molding punch so that the molding insert and the inner side surface of the product are extruded and formed.

9. The mold structure according to claim 8, characterized in that: The blanking bolt is installed in the lower template.

10. A method for using the mold structure according to claim 9, characterized in that, It includes the following steps: (1) In the initial state, the upper die is separated from the lower die. The product to be processed is placed in the die, and the product to be processed is pressed by the blanking plate and the lower template. (2) The die moves downward. The wedge punch extrudes the forming insert, and under the action of the blanking bolt, the forming insert is pushed into the product gap, and the stamping groove of the forming insert contacts the inner side surface of the product. (3) The die continues to move downward. The forming punch extrudes the driving inclined surface of the lower die insert, so that the forming punch generates a force for lateral movement when contacting, and extrudes the product, so that the forming insert and the product are extruded to complete the forming of the inner side surface of the product. (4) Driven by the die, the wedge punch and the forming punch return to the initial state, and the processed and formed product is taken out.

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