Die insert and stamping die assembly
By installing detachable die inserts on the stamping die and using color-coded grooves to indicate the amount of wear, the problem of insufficient positioning accuracy caused by wear of the positioning groove is solved, thereby improving the dimensional accuracy and production efficiency of stamped parts.
Patent Information
- Application Number
- CN202520269466.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-20
AI Technical Summary
The positioning groove of the stamping die wears down during use, resulting in insufficient positioning accuracy. It is difficult to judge the amount of wear with the naked eye, which leads to the stamped parts not meeting the dimensional accuracy requirements and reducing production efficiency.
A mold insert is provided, which is detachably mounted on a stamping die. The peripheral wall of the positioning groove is provided with a groove and coated with a color that is easy to observe with the naked eye. The groove depth indicates the amount of wear. When the critical value is reached, the mold insert can be quickly replaced.
It enables rapid determination of the wear of the positioning groove, ensuring the positioning accuracy of the stamping die, reducing the defect rate, and improving production efficiency.
Smart Images
Figure CN223699078U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of stamping machines, in particular to a positioning mechanism of a stamping die. BACKGROUND
[0002] A stamping device comprises a fixed stamping machine tool with a worktable and a removable stamping die, which can be placed on the worktable of the machine tool by a lifting device such as a robot, or removed from the worktable. The position of the stamping die installed on the worktable needs to be fixed each time. In order to achieve accurate positioning, a plurality of positioning pins are arranged on the worktable, and a plurality of positioning grooves are arranged on the stamping die correspondingly, which cooperate with the positioning pins on the worktable, so as to achieve high-precision positioning when the stamping die is placed on the worktable by the robot. The high-precision positioning achieved by the cooperation of the positioning grooves and the positioning pins can ensure the dimensional accuracy of the stamped parts, and is beneficial to the smooth taking and placing of the parts by the robot.
[0003] The problem existing in the actual production process of the stamping device is that, since the material forming the positioning groove in the stamping die has a smaller hardness than the positioning pin on the worktable, the positioning groove will be worn after a certain number of uses due to the collision between the positioning groove and the positioning pin and other reasons during the lifting of the stamping die by the robot to align the positioning groove with the positioning pin. As a result, the positioning accuracy between the positioning groove and the positioning pin is insufficient. Moreover, the wear of the positioning groove cannot be determined by the naked eye, and it is also not easy to measure. Therefore, the relative position between the stamping die and the stamping machine tool is offset due to the wear, which leads to the dimensional accuracy of the stamped parts produced by the stamping device not meeting the requirements, resulting in defective products, and reducing the production efficiency. SUMMARY
[0004] The purpose of the present application is to solve the above technical problems, and to provide a die insert and a stamping die assembly provided with the die insert, which can determine the wear by the naked eye when the wear of the positioning groove of the stamping die reaches a certain degree.
[0005] Another purpose of the present application is to provide a die insert and a stamping die assembly provided with the die insert, which can quickly solve the problem of insufficient positioning accuracy of the stamping die caused by the wear of the positioning groove when the wear of the positioning groove reaches a certain degree.
[0006] A die insert is provided, which is capable of being detachably mounted to a press die that is positionable on a table of a press machine, characterized in that the die insert comprises: a positioning groove capable of cooperating with a positioning pin on the table, the positioning groove receiving the positioning pin when the press die is positioned on the table, a peripheral wall of the positioning groove being at least partially in contact with the positioning pin such that the press die is positioned by the positioning pin without being in contact with the positioning pin, wherein the hardness of the die insert is less than the hardness of the positioning pin; and at least one groove provided in the peripheral wall of the positioning groove, the groove being recessed from the surface of the peripheral wall of the positioning groove by a certain depth.
[0007] Preferably, the groove extends along the peripheral wall of the positioning groove.
[0008] Preferably, the groove on the peripheral wall of the positioning groove is coated with a color layer.
[0009] Preferably, the die insert comprises a plurality of grooves, the plurality of grooves being recessed from the surface of the peripheral wall of the positioning groove by different depths from each other, and being coated with color layers of different colors from each other.
[0010] Preferably, the plurality of grooves extend along the peripheral wall of the positioning groove in parallel to each other.
[0011] Preferably, two grooves are provided in the peripheral wall of the positioning groove, wherein the depth of a second groove is greater than the depth of a first groove, the depth of the second groove corresponding to a critical wear amount at which the die insert needs to be replaced.
[0012] Preferably, a corner portion of the die insert has a chamfer.
[0013] Preferably, the die insert is capable of being mounted in a recess provided in the bottom of the press die, a periphery of a top surface of the die insert comprises a chamfer, and / or a lower surface of the die insert has a chamfer at the periphery of the positioning groove.
[0014] Preferably, the die insert further comprises at least one fixing hole through which a fastener is capable of passing, thereby detachably mounting the die insert on the press die.
[0015] Preferably, the die insert comprises three fixing holes distributed around the positioning groove, and / or the fixing hole has two portions of different diameters, adapted to receive a countersunk screw.
[0016] A press die assembly is also provided, comprising: a press die positionable on a table of a press machine; and at least one die insert detachably mounted on the press die.
[0017] Preferably, the bottom of the stamping die includes a recess in which the die insert is received.
[0018] Preferably, at least a portion of the peripheral wall of the positioning groove of the mold insert protrudes relative to the stamping die, and at the outer edge of the mold insert, the mold insert is flush with the corresponding outer edge of the stamping die, or the mold insert is recessed relative to the corresponding outer edge of the stamping die.
[0019] Preferably, four die inserts are detachably mounted on the stamping die, with two die inserts provided on each positioning edge of the stamping die. The stamping die has a centerline perpendicular to the positioning edge, and the shape of the positioning grooves of the two die inserts on each positioning edge is mirror-symmetrical about the centerline.
[0020] Preferably, the stamping die has a positioning groove, and the shape of the positioning groove of the die insert is at least partially the same as the shape of the positioning groove of the stamping die.
[0021] In this application, a die insert is detachably mounted on the stamping die. By manufacturing spare parts, rapid repair can be achieved when wear reaches a critical value by replacing the spare parts. Furthermore, at least one groove is provided on the peripheral wall of the positioning groove of the die insert, and it is coated with a color easily visible to the naked eye. Therefore, the user can determine the amount of wear on the positioning groove by observing whether the color of the corresponding groove is visible, and once the wear reaches a certain level, it can be visually determined that the die insert needs to be replaced. Attached Figure Description
[0022] A better understanding of various aspects of this application will be achieved by reading the following detailed description in conjunction with the accompanying drawings, in which:
[0023] Figure 1 This is a schematic perspective view of the stamping equipment according to this application;
[0024] Figure 1a yes Figure 1 A magnified view of the circled part A;
[0025] Figure 2 yes Figure 1 A top view of the stamping equipment;
[0026] Figure 2a yes Figure 2 A magnified view of the circled part B in the image;
[0027] Figure 3 This is a perspective view of the mold insert according to this application;
[0028] Figure 4 is a front view of a mold insert of Figure 3 ;
[0029] Figure 5 is a top view of a mold insert of Figure 3 ;
[0030] Figure 6 is a sectional view along line C-C in Figure 5 ; and
[0031] Figure 6a is an enlarged view of the circled portion D in Figure 6 . DETAILED DESCRIPTION
[0032] The present application will be described with reference to the accompanying drawings, which illustrate several embodiments of the present application. It should be understood, however, that the present application can be presented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be complete and fully convey the scope of the present application to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in a variety of ways, thereby providing many additional embodiments.
[0033] Figure 1 and Figure 2 schematically shows a punch mold 1 placed on a worktable 2 of a fixed punch machine bed, see Figure 1a and Figure 2a , in which a plurality of positioning pins 21 on the worktable 2 are shown, and the punch mold 1 includes positioning grooves 11.
[0034] As described above, in the prior art, the positioning grooves 11 of the punch mold 1 cooperate with the positioning pins 21 on the worktable 2 to achieve high-precision positioning when the punch mold 1 is placed on the worktable 2 by a mechanical hand (not shown). Therefore, due to the collision between the positioning grooves 11 and the positioning pins 21 during the above positioning process, and other reasons, the positioning grooves 11 will show collision wear after a certain number of uses, resulting in insufficient positioning accuracy between the positioning grooves 11 and the positioning pins 21. The amount of wear of the positioning grooves 11 is difficult to determine with the naked eye and is not easy to measure, so the relative position of the punch mold 1 and the worktable 2 of the punch machine bed is offset, resulting in defective products and reducing production efficiency.
[0035] To solve the above technical problems, the present application provides a die insert 3 which can be detachably mounted to the stamping die 1 and comprises a positioning groove 31, a peripheral wall of the positioning groove 31 at least partially protruding relative to a peripheral wall of the positioning groove 11 of the stamping die 1 so as to replace the stamping die 1 and contact the positioning pin 21, and the die insert 3 having a hardness less than that of the positioning pin 21. Therefore, during the positioning process of the stamping die 1, the collision wear occurs on the positioning groove 31 of the die insert 3 in contact with the positioning pin 21, so that when the wear of the positioning groove 31 of the die insert 3 reaches a critical value, only the worn die insert 3 needs to be detached from the stamping die 1 and replaced with a new die insert 3, so that the problem of insufficient positioning accuracy of the stamping die caused by wear of the positioning groove can be quickly solved by using the die insert 3 of the present application.
[0036] In addition, in order to solve the problem that it is difficult to judge the collision wear of the positioning groove with the naked eye, the inventors provide at least one groove 311, 312 (see Figure 1a and Figure 6a ) on the peripheral wall of the positioning groove 31 of the die insert 3 of the present application, and preferably the at least one groove 311, 312 is coated with a color that is easy to observe with the naked eye, such as red, yellow, etc. The at least one groove 311, 312 is recessed from the peripheral wall of the positioning groove 31 of the die insert 3 by a certain depth, which can correspond to a critical value of the wear amount at which the die insert 3 needs to be replaced. For a new die insert 3, the color of the at least one groove 311, 312 is not easy to be observed by the user. However, after a certain number of uses, the positioning groove 31 of the die insert 3 is worn to the depth of the at least one groove 311, 312, and the color of the at least one groove 311, 312 is exposed and can be observed by the user. Grooves of different depths can be coated with different colors, for example Figure 1a and Figure 6a show a first groove 311 and a second groove 312 with different depths, wherein the depth of the second groove 312 is greater than that of the first groove 311, and the depth of the second groove 312 corresponds to a critical value of the wear amount at which the die insert 3 needs to be replaced, and the depth of the first groove 311 corresponds to a warning value, for example. Therefore, when the user can observe the color of the first groove 311, it can be known that the positioning groove 31 is worn to the warning degree, and when the user can observe the color of the second groove 312, the user knows that the die insert 3 needs to be replaced. Therefore, by using the die insert 3 of the present application, the wear amount can be judged by the naked eye when the wear of the positioning groove 31 reaches a certain degree.
[0037] In particular, with reference to Figure 3 , Figure 4 ,Figure 5 、 Figure 6 、 Figure 6a wherein the die insert 3 of the present application is shown, which can be mounted to the press die 1 shown in Figure 1 、 2 in a detachable manner.
[0038] The die insert 3 comprises the positioning groove 31, which can cooperate with the positioning pin 21 on the worktable 2, when the press die 1 is positioned on the worktable 2, the positioning groove 31 receives the positioning pin, the peripheral wall of the positioning groove 31 is at least partially in contact with the positioning pin 21, while other parts of the press die 1 are not in contact with the positioning pin 21, wherein the hardness of the die insert 3 is less than the hardness of the positioning pin 21; at least one groove 311, 312 is provided in the peripheral wall of the positioning groove 31, the groove 311, 312 is recessed from the surface of the peripheral wall of the positioning groove 31 by a certain depth. The die insert 3 can further comprise at least one fixing hole 32, through which a fastener (not shown) can pass, so as to mount the die insert 3 on the press die 1.
[0039] Preferably, the grooves 311, 312 extend along the peripheral wall of the positioning groove 31. Preferably, a plurality of the grooves 311, 312 are parallel to each other.
[0040] In one embodiment, the grooves 311, 312 on the peripheral wall of the positioning groove 31 are coated with color layers, when a plurality of the grooves are included, the depths at which a plurality of the grooves 311, 312 are recessed from the surface of the peripheral wall of the positioning groove 31 are different from each other, and the color layers coated are different from each other.
[0041] For example, as shown in the examples in Figure 1a 、 Figure 6a , two grooves 311, 312 are provided on the peripheral wall of the positioning groove 31, wherein the depth of the second groove 312 is greater than the depth of the first groove 311, the depth of the first groove 311 corresponds to a warning value, for example 0.3mm, and is coated with yellow, the depth of the second groove 312 corresponds to a critical wear amount at which the die insert 3 needs to be replaced, and is 0.5mm in depth and is coated with red. When the user can observe yellow, it can be known that the wear amount of the die insert 3 is 0.3mm, and it is necessary to closely observe whether the die insert 3 reaches the critical wear amount. When the user can observe red, it can be known that the wear amount of the die insert 3 is 0.5mm, and reaches the critical wear amount, and a new die insert 3 needs to be replaced.
[0042] In one embodiment, referring to Figure 2aThe enlarged view shows that the positioning groove 31 of the die insert 3 protrudes with respect to the press die 1 at least in the portion in contact with the positioning pin 21, so that the die insert 3 is in contact with the positioning pin 21, and the peripheral wall of the positioning groove 11 of the press die 1 is not in contact with the positioning pin 21.
[0043] In this embodiment, preferably, the positioning groove 31 of the die insert 3 has a shape at least partially identical to that of the positioning groove 11 of the press die 1, as shown in Figure 2a It is conceivable that the positioning groove 31 of the die insert 3 can have a shape different from that of the positioning groove 11 of the press die 1, provided that in the portion in contact with the positioning pin 21 the die insert 3 protrudes with respect to the press die 1, and that the positioning groove 11 of the press die 1 can comprise any shape, provided that it does not interfere with the cooperation of the positioning groove 31 of the die insert 3 with the positioning pin 21.
[0044] As shown in Figure 4 , the die insert 3 has a substantially rectangular shape, and for ease of installation in the press die 1, the corners of the die insert 3 have chamfers 33.
[0045] Referring to Figure 1a , in one embodiment, the die insert 3 can be installed in a recess 12 provided on the bottom of the press die 1. In this embodiment, as shown in Figure 4 , Figure 5 , the periphery of the top surface of the die insert 3 comprises chamfers 34, which facilitate the positioning of the die insert 3 in the recess 12.
[0046] Referring to Figure 4 , Figure 6 , Figure 6a , the lower surface of the die insert 3 has chamfers 35 around the periphery of the positioning groove 31, which facilitate the entry of the positioning pin 21 into the positioning groove 31 when positioning.
[0047] Referring to Figure 3 , Figure 5 , the die insert 3 preferably comprises three fixing holes 32 distributed around the positioning groove 31. Referring to Figure 6 , the fixing holes 32 have two portions 321, 322 of different diameters, adapted to receive a countersunk screw (not shown).
[0048] Referring to Figure 1 , Figure 2Fig. 1 shows a perspective view of a stamping die assembly according to the present application, comprising a stamping die 1 and at least one die insert 3 removably mounted in the stamping die 1. Fig. 2 shows a top view of the stamping die assembly of Fig. 1, the stamping die 1 being positioned on a worktable 2 of a stamping machine.
[0049] As shown in Fig. 1, the stamping die 1 comprises a positioning slot 11 in its bottom, the die insert 3 being received in the positioning slot 11. Figure 1a As shown in Fig. 1, the stamping die 1 comprises a positioning slot 11 in its bottom, the die insert 3 being received in the positioning slot 11.
[0050] As shown in the enlarged view of Fig. 1, at least a portion of the peripheral wall of the positioning slot 31 of the die insert 3 protrudes with respect to the stamping die 1, so that the die insert 3 is in contact with the positioning pin 21, while the stamping die 1 is not in contact with the positioning pin 21. Figure 2a As shown in the enlarged view of Fig. 1, at least a portion of the peripheral wall of the positioning slot 31 of the die insert 3 protrudes with respect to the stamping die 1, so that the die insert 3 is in contact with the positioning pin 21, while the stamping die 1 is not in contact with the positioning pin 21. Figure 1a As shown in the enlarged view of Fig. 1, at least a portion of the peripheral wall of the positioning slot 31 of the die insert 3 protrudes with respect to the stamping die 1, so that the die insert 3 is in contact with the positioning pin 21, while the stamping die 1 is not in contact with the positioning pin 21. Figure 1a As shown in the enlarged view of Fig. 1, at least a portion of the peripheral wall of the positioning slot 31 of the die insert 3 protrudes with respect to the stamping die 1, so that the die insert 3 is in contact with the positioning pin 21, while the stamping die 1 is not in contact with the positioning pin 21.
[0051] Still referring to Fig. 1, Figure 1 Figure 2 Four die inserts 3 can be mounted on the stamping die 1, two die inserts 3 being arranged on each positioning edge of the stamping die 1. The stamping die has a median line L perpendicular to the positioning edges, the positioning slots 31 of the two die inserts 3 on each positioning edge being mirror-symmetrical with respect to the median line L. Preferably, the positioning slot 11 of the stamping die 1 is mirror-symmetrical with respect to the median line L. In particular, referring to Fig. 1, Figure 2a The positioning slots 31 of the die inserts 3 and the positioning slot 11 of the stamping die 1 are not symmetrical shapes, but have a greater inclination on one side than on the other side, which facilitates the guiding of the positioning pin 21 into the positioning slots 11, 31. In this embodiment, the positioning slots 11, 31 on both sides of the median line L are mirror-symmetrical with respect to the median line L, which facilitates the accurate positioning of the stamping die 1 on the worktable 2.
[0052] As mentioned above, the positioning slot 11 of the stamping die 1 can comprise any shape, provided that it does not interfere with the cooperation of the positioning slots 31 of the die inserts 3 with the positioning pin 21, and that, in the portion in contact with the positioning pin 21, the die insert 3 protrudes with respect to the stamping die 1.
[0053] From the above description, in the present application, the die insert is detachably mounted on the stamping die, and through the method of making spare parts, the die insert can be replaced when the wear reaches the critical value to achieve rapid repair. In addition, at least one groove is arranged on the peripheral wall of the positioning groove of the die insert, and a color that is easy to observe with the naked eye is coated, so that the user can know the wear amount of the positioning groove by whether the color of the corresponding groove is observed, and after the wear reaches a certain degree, the need to replace the die insert can be known by naked eye observation.
[0054] Although exemplary embodiments of the present application have been described, it will be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present application without substantially departing from the spirit and scope of the present application. Therefore, all changes and modifications are included within the scope of the present application as defined by the claims. The present application is defined by the appended claims, and equivalents thereof are also included.
Claims
1. A die insert, which can be mounted in a detachable manner to a stamping die (1), which can be positioned on a table (2) of a stamping machine, characterized in that, The mold insert (3) comprises: a positioning groove (31) capable of cooperating with a positioning pin (21) on the worktable, the positioning groove (31) receiving the positioning pin when the stamping die (1) is positioned on the worktable (2), a peripheral wall of the positioning groove (31) being at least partially in contact with the positioning pin (21) so that the stamping die is positioned by the positioning pin without being in contact with the positioning pin, wherein the hardness of the mold insert (3) is less than the hardness of the positioning pin (21); and at least one groove (311, 312) provided in the peripheral wall of the positioning groove (31), the groove being recessed from the surface of the peripheral wall of the positioning groove by a certain depth.
2. The mold insert of claim 1, wherein, The groove (311, 312) extends along the peripheral wall of the positioning groove.
3. The mold insert of claim 1, wherein, The groove (311, 312) on the peripheral wall of the positioning groove (31) is coated with a color layer.
4. The mold insert of claim 1, wherein, The mold insert comprises a plurality of grooves, the plurality of grooves being recessed from the surface of the peripheral wall of the positioning groove by different depths from each other, and being coated with color layers of different colors from each other.
5. The mold insert of claim 4, wherein, The plurality of grooves extend along the peripheral wall of the positioning groove in parallel to each other.
6. The mold insert of claim 5, wherein, Two grooves are provided in the peripheral wall of the positioning groove, wherein the depth of the second groove (312) is greater than the depth of the first groove (311), the depth of the second groove corresponding to a critical wear amount at which the mold insert needs to be replaced.
7. The mold insert of any one of claims 1-6, wherein, The corner portion of the mold insert has a chamfer (33).
8. The mold insert of any one of claims 1-6, wherein, The mold insert can be installed in a recess (12) provided at the bottom of the stamping die, the periphery of the top surface of the mold insert comprises a chamfer (34), and / or the lower surface of the mold insert has a chamfer (35) at the periphery of the positioning groove (31).
9. The mold insert of any one of claims 1-6, wherein, The mold insert further comprises at least one fixing hole (32) through which a fastener can pass, thereby detachably installing the mold insert (3) on the stamping die (1).
10. The mold insert of claim 9, wherein, The mold insert comprises three fixing holes (32) distributed around the positioning groove, and / or the fixing hole has two portions (321, 322) with different diameters, adapted to receive a countersunk screw.
11. A punch and die assembly characterized by, The stamping die assembly comprises: a stamping die (1) capable of being positioned on a worktable (2) of a stamping machine tool; and at least one mold insert (3) according to any one of claims 1-10, the mold insert being detachably installed on the stamping die (1).
12. The stamping die of claim 11, wherein, The bottom of the stamping die comprises a recess (12) in which the mold insert is accommodated.
13. The stamping die of claim 11 or 12, wherein, At least a portion of the peripheral wall of the positioning groove (31) of the mold insert protrudes relative to the stamping die, at the outer edge (36) of the mold insert, the mold insert is flush relative to the corresponding outer edge of the stamping die, or the mold insert is recessed relative to the corresponding outer edge of the stamping die.
14. The stamping die of claim 11 or 12, wherein, Four said die inserts (3) are detachably mounted on said stamping die (1), two said die inserts are arranged on each locating edge of said stamping die, said stamping die has a center line (L) perpendicular to said locating edges, the locating grooves of the two said die inserts on each said locating edge are mirror-symmetric about said center line.
15. The mold insert of claim 11 or 12, wherein, Said stamping die has a locating groove (11), the shape of the locating groove of said die insert is at least partially identical to the shape of the locating groove of said stamping die.