Mould for gasket machining

Abstract

The utility model relates to the field of dies, in particular to a gasket machining die which comprises a bottom plate, a lower die and a stamping head, the stamping head is arranged above the lower die and can be close to or away from the lower die, a die hole and a waste material hole are formed in the lower die, and an arc-shaped ring face is arranged on the inner side face of the die hole. The punching head comprises a main body, a first punching rod, a second punching rod and a locking assembly, the first punching rod is fixedly connected with the main body, the second punching rod is slidably connected with the main body, the locking assembly comprises a plurality of locking heads and a pressing rod, and the pressing rod moves up and down to change the horizontal positions of the locking heads; the locking head enables the second thrust rod and the first thrust rod to move at the same time or not at the same time by changing the horizontal position. Through the arrangement of the first punching rod and the second punching rod, when the inner hole of the gasket is punched, the second punching rod and the bottom surface of the die hole fix the blank of the gasket, so that the inner hole of the gasket has no position for generating a bulge, and the flatness of the obtained gasket is improved.

Description

Technical Field

[0001] This invention relates to the field of molds, and more particularly to a mold for processing gaskets. Background Technology

[0002] A washer, also known as a gasket, is a part placed between a connected component and a nut. It is generally a flat metal ring used to protect the surface of the connected component from scratches by the nut and to distribute the pressure of the nut on the connected component.

[0003] Currently, small gaskets are often produced by stamping. However, during the punching process, stamped products may develop upward bulges around the inner holes due to extrusion, affecting the flatness of the gasket. Therefore, it is necessary to improve this structure to overcome the aforementioned defects. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mold for gasket processing. This invention is achieved through the following technical solution:

[0005] A die for gasket processing includes a base plate, a lower die, and a punch head. The punch head is positioned above the lower die and can be close to or away from the lower die. The lower die has a die hole and a scrap hole, with the scrap hole concentrically arranged with the die hole. An annular surface with an arc-shaped cross-section is provided on the inner side of the die hole. The punch head includes a main body, a first break-off rod, and a second break-off rod. The first break-off rod is fixedly connected to the main body, and the second break-off rod is sleeved on the first break-off rod and slidably connected to the main body. The punch head also has a locking assembly, which includes several locking heads and pressure rods. The pressure rods move up and down to change the horizontal position of the locking heads. The change in the horizontal position of the locking heads causes the second break-off rod and the first break-off rod to move simultaneously or at different times.

[0006] In the above technical solution: the base plate is used to set the lower die and facilitates its installation on the machine tool; the lower die is used to determine the inner and outer diameters of the produced gasket; the punch head is used to cooperate with the lower die to punch material of appropriate size from the raw material sheet to form a gasket blank, and then punch out the inner hole of the gasket to form the gasket; the die hole is used to determine the outer diameter of the gasket; the scrap hole is used to remove the scrap generated during the punching of the inner hole of the gasket; the annular surface is used to provide the direction of gasket expansion during the punching of the inner hole, so as to release the gasket stress and avoid the inner hole of the gasket being hollow. The circumferential protrusion; the arrangement of the first and second punching rods ensures that after the gasket blank is stamped, the bottom surface of the second punching rod and the die hole fixes the upper and lower surfaces of the gasket blank. Subsequently, when the first punching rod moves down to stamp the inner hole of the gasket, there is no position at the edge of the inner hole for the protrusion to be generated, thereby avoiding the upward protrusion around the inner hole; the locking assembly is used to make the second punching rod move synchronously or asynchronously with the first punching rod; the locking head is used to lock or unlock the main body and the second punching rod; the pressure rod is used to control the movement of the locking head.

[0007] A further feature of this invention is that the diameter of the waste hole is consistent with the inner diameter of the gasket to be processed, and the diameter of the mold hole is consistent with the outer diameter of the gasket to be processed.

[0008] In the above technical solution: the diameter of the waste hole is consistent with the inner diameter of the gasket to be processed, and the diameter of the mold hole is consistent with the outer diameter of the gasket to be processed, so as to ensure that the finished gasket is dimensionally accurate.

[0009] A further feature of this invention is that a plurality of locking holes are provided on the outer surface of the second breaking rod, and the locking holes are provided corresponding to the locking head.

[0010] In the above technical solution: the locking hole is used to cooperate with the locking head. When the two are engaged, the first and second breaking rods move synchronously. When the two are separated, the first and second breaking rods may not move synchronously.

[0011] A further feature of this invention is that a plurality of mounting holes are horizontally penetrating the main body, the positions of the mounting holes correspond to the locking holes, and the locking head is slidably disposed in the mounting holes.

[0012] In the above technical solution: the mounting hole is used to install the locking head.

[0013] A further feature of this invention is that the pressure rod is provided with a vertically oriented long groove, the two ends of the long groove are connected to the outer circumference of the pressure rod by arc surfaces, and the end of the locking head away from the second breaking rod is the contact end, which is a hemispherical surface.

[0014] In the above technical solution: the long groove is used to cooperate with the contact end of the locking head to realize the horizontal position movement of the locking head by the relative position change of the pressure rod and the main body.

[0015] A further feature of this invention is that the lower mold is also provided with a discharge channel, which includes a horizontal section and an inclined section.

[0016] In the above technical solution: the discharge channel is used to facilitate the discharge of waste materials.

[0017] A further feature of this invention is that the waste hole is connected to the inclined section.

[0018] In the above technical solution: the waste hole is connected to the inclined section so that the waste falls onto the inclined section and then falls out under the action of gravity.

[0019] A further feature of this invention is that the waste hole is connected to the horizontal section, and a pushing block is also provided in the horizontal section, the pushing block being able to move horizontally.

[0020] In the above technical solution: the pusher block is used to push the waste falling on the horizontal section to the inclined section, and compared with the waste hole being directly connected to the inclined section, the reciprocating motion of the pusher block can avoid the accumulation of waste.

[0021] A further feature of this invention is that the outer diameter of the second punching rod is the same as the diameter of the mold hole, and the inner diameter of the second punching rod is the same as the diameter of the first punching rod.

[0022] In the above technical solution: the outer diameter of the second punching rod is consistent with the diameter of the mold hole, and the inner diameter of the second punching rod is consistent with the diameter of the first punching rod, which is used to ensure that when punching the inner hole of the shim, there is no position for protrusion to be generated at the edge of the inner hole of the shim.

[0023] A further feature of this invention is that the diameter of the first punch rod is the same as the diameter of the waste hole.

[0024] This invention discloses a mold for gasket processing, which, compared with the prior art:

[0025] This utility model, through the setting of the first and second punching rods, ensures that when the inner hole of the gasket is punched, the bottom surface of the second punching rod and the die hole fixes the gasket blank, so that there is no position for the protrusion to be generated in the inner hole of the gasket, thereby improving the flatness of the obtained gasket.

[0026] This utility model also uses the ring surface to make the gasket expand slightly and evenly in the outer diameter direction after being squeezed during stamping, and recover after the second punch rod stops contacting the gasket, thereby avoiding the situation of uneven release of internal stress in the finished gasket and resulting in poor flatness.

[0027] This invention also uses a locking component and a locking hole to change the locking situation between the second punching rod and the main body by changing the relative position between the pressure rod and the main body. This automatically ensures that the first punching rod only starts punching the inner hole of the gasket after the second punching rod contacts the gasket blank, so as to ensure that no protrusion is generated around the central hole. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the present invention;

[0029] Figure 2 This is a schematic diagram showing the state of the gasket blank after stamping is completed according to the present invention;

[0030] Figure 3 This is a schematic diagram showing the state of the gasket inner hole after stamping is completed according to the present invention;

[0031] Figure 4 This is a schematic diagram of the pressure bar of the present invention;

[0032] Figure 5 This is a schematic diagram of the second breaking rod of the present invention;

[0033] Figure 6 This is a schematic diagram of the locking head of the present invention;

[0034] Figure 7 This is an enlarged schematic diagram of the mold hole of the present invention.

[0035] The numbers and letters in the diagram represent the following component names: 10-Base plate; 20-Lower die; 201-Die hole; 202-Scrap hole; 203-Ring surface; 204-Discharge channel; 204a-Horizontal section; 204b-Inclined section; 30-Punching head; 301-Main body; 302-First punching rod; 303-Second punching rod; 303a-Locking hole; 40-Locking assembly; 401-Locking head; 401a-Contact end; 402-Pressure rod; 402a-Long slot; 50-Push block. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments.

[0037] like Figure 1-7As shown, the present invention proposes a die for gasket processing, comprising a base plate 10, a lower die 20, and a punch head 30. The punch head 30 is disposed above the lower die 20 and can be close to or away from the lower die 20. The lower die 20 is provided with a die hole 201 and a scrap hole 202, the scrap hole 202 being concentrically arranged with the die hole 201. An annular surface 203 is provided on the inner side of the die hole 201, the cross-section of the annular surface 203 being arc-shaped. The punch head 30 includes a body 301, a first punch rod 302, and a second punch rod 303. 3. The first breaking rod 302 is fixedly connected to the main body 301. The second breaking rod 303 is sleeved on the first breaking rod 302 and slidably connected to the main body 301. The punching head 30 is also provided with a locking assembly 40. The locking assembly 40 includes a plurality of locking heads 401 and pressure rods 402. The pressure rods 402 move up and down to change the horizontal position of the locking heads 401. The locking heads 401 cause the second breaking rod 303 and the first breaking rod 302 to move simultaneously or at different times by changing their horizontal position. The main body 301 is provided with a first mounting hole, which is a stepped hole. The second punching rod 303 is slidably disposed in the stepped hole and is a stepped shaft. The first punching rod 302 is fixedly connected to the bottom surface of the first mounting hole. A first spring is sleeved on the first punching rod 302. One end of the first spring is in contact with the bottom surface of the first mounting hole, and the other end is in contact with the end of the second punching rod 303. The main body 301 is also provided with a plurality of second mounting holes, which are evenly arranged with the first mounting hole as the center. The pressure rod 402 is slidably disposed in the second mounting holes. The height of the annular surface 203 is not less than the thickness of the gasket to be processed, so as to facilitate the removal of the gasket. The height of the annular surface 203 is less than the height of the mold hole 201, so that the gasket blank can be smoothly punched. The annular surface 203 is located in the middle of the side wall of the mold hole 201 to avoid affecting the positioning effect of the mold hole 201.

[0038] like Figure 1-7 As shown, the present invention proposes a die for processing gaskets, wherein the diameter of the waste hole 202 is consistent with the inner diameter of the gasket to be processed, and the diameter of the die hole 201 is consistent with the outer diameter of the gasket to be processed. The depth of the die hole 201 is greater than the thickness of the gasket to be processed.

[0039] like Figure 1-7 As shown, the present invention proposes a die for processing gaskets, wherein a plurality of locking holes 303a are provided on the outer surface of the second punch rod 303, and the locking holes 303a are correspondingly provided with the locking head 401. The locking head 401 has a guide cone surface at one end near the locking hole.

[0040] like Figure 1-7 As shown, the present invention proposes a mold for gasket processing. The main body 301 has a plurality of horizontally penetrating mounting holes 301a, the positions of which correspond to the locking holes 303a, and the locking head 401 is slidably disposed in the mounting holes 301a. Specifically, the mounting hole has a smaller diameter at the end near the second break rod 303 and a larger diameter at the end away from the second break rod 303; the diameter of the locking head 401 is the same as the diameter of the end of the mounting hole near the second break rod 303, and the locking head 401 is also provided with a protruding ring, the diameter of which is the same as the diameter of the end of the mounting hole away from the second break rod 303, serving a guiding function; the locking head 401 is also provided with a second spring, one end of which is in contact with the protruding ring, and the other end of which is in contact with the mounting hole.

[0041] like Figure 1-7 As shown, this invention proposes a mold for gasket processing. The pressure rod 402 has a vertically oriented long groove 402a. Both ends of the long groove 402a are connected to the outer circumference of the pressure rod 402 by arc surfaces. The locking head 401, away from the second breaking rod 303, has a contact end 401a, which is a hemispherical surface. The pressure rod 402 is divided into a long groove section, a stepped section, and a pressure plate from top to bottom. The long groove 402a is located on the long groove section. The stepped section is fitted with the second mounting hole, and a third spring is sleeved on the stepped section. One end of the third spring contacts the stepped section, and the other end contacts the second mounting hole. The pressure plate increases the contact area with the raw material sheet.

[0042] like Figure 1-7 As shown, the present invention proposes a mold for gasket processing, wherein the lower mold 20 is further provided with a discharge channel 204, the discharge channel 204 including a horizontal section 204a and an inclined section 204b.

[0043] like Figure 1-7 As shown, the present invention proposes a mold for gasket processing, wherein the waste hole 202 is connected to the inclined section 204b.

[0044] like Figure 1-7 As shown, the present invention proposes a mold for gasket processing, wherein the waste hole 202 is connected to the horizontal section 204a, and a pushing block 50 is also provided in the horizontal section 204a, the pushing block 50 being horizontally movable. The pushing block 50 is driven by a cylinder, which is fixedly mounted on the lower mold 20.

[0045] like Figure 1-7As shown, the present invention proposes a die for processing gaskets. The outer diameter of the second punch rod 303 is the same as the diameter of the die hole 201, and the inner diameter of the second punch rod 303 is the same as the diameter of the first punch rod 302. The lower die 20 may also include a blanking block, and a scrap outlet is located on the blanking block. The blanking block also has a blanking port, the diameter of which is larger than the size of the processed gasket. The blanking block can switch the positions of the blanking port and the scrap outlet by horizontal movement, so that scrap material falls into the discharge channel 204 during stamping, and the finished gasket falls into the discharge channel 204 after stamping.

[0046] like Figure 1-7 As shown, the present invention proposes a die for processing gaskets, wherein the diameter of the first punch rod 302 is the same as the diameter of the waste hole 202.

[0047] The working principle of this utility model is as follows:

[0048] Install the base plate onto the stamping machine, and fix the stamping machine spindle to the main body;

[0049] Place the raw material sheet between the main body and the lower mold;

[0050] The press spindle descends, causing the main body to descend as well;

[0051] The second punching rod and the pressure rod simultaneously contact the raw material sheet, at which point the second punching rod is locked to the main body (e.g., ...). Figure 1 );

[0052] The spindle continues to descend, and the second punching rod engages with the die hole to complete the stamping of the gasket blank;

[0053] The gasket blank falls into the mold hole, and the second punch rod contacts the upper surface of the gasket blank;

[0054] At this point, as the main body descends, and the pressure rod is blocked by the raw material sheet and cannot descend, the pressure rod moves upward relative to the main body. The long groove on the pressure rod moves upward simultaneously, and the contact end of the locking head is pushed into the long groove under the action of the second spring. The locking head separates from the locking hole, thus unlocking the second breaking rod from the main body (as shown). Figure 2 );

[0055] The main shaft continues to move downwards, the position of the second break bar remains unchanged, and the first break bar continues to move downwards;

[0056] The first punching rod engages with the scrap outlet to achieve the punching of the central hole in the gasket blank (e.g., Figure 3 );

[0057] Waste material falls into the discharge channel and is pushed away by the push block;

[0058] As the main axis moves upward, the main body moves upward accordingly.

[0059] When the relative position between the pressure rod and the main body changes, and the locking head is aligned with the locking hole, the locking head just disengages from the long groove on the pressure rod and is pushed into the locking hole by the pressure rod.

[0060] As the main shaft continues to move, the second break bar, the first break bar, and the pressure bar all move upwards.

[0061] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A die for processing gaskets, comprising a base plate (10), a lower die (20), and a punch head (30), wherein the punch head (30) is disposed above the lower die (20) and the punch head (30) can be close to or away from the lower die (20), characterized in that: The lower die (20) is provided with a die hole (201) and a scrap hole (202). The scrap hole (202) is concentrically arranged with the die hole (201). An annular surface (203) is provided on the inner side of the die hole (201). The cross-section of the annular surface (203) is arc-shaped. The stamping head (30) includes a main body (301), a first punch rod (302), and a second punch rod (303). The first punch rod (302) is fixedly connected to the main body (301), and the second punch rod (303) is sleeved on the die. The first punching rod (302) and the second punching rod (303) are slidably connected to the main body (301). The punching head (30) is also provided with a locking assembly (40). The locking assembly (40) includes a plurality of locking heads (401) and pressure rods (402). The pressure rods (402) move up and down to change the horizontal position of the locking heads (401). The locking heads (401) change the horizontal position so that the second punching rod (303) and the first punching rod (302) move simultaneously or at different times.

2. The mold for gasket processing according to claim 1, characterized in that: The diameter of the waste hole (202) is consistent with the inner diameter of the gasket to be processed, and the diameter of the mold hole (201) is consistent with the outer diameter of the gasket to be processed.

3. The mold for gasket processing according to claim 1, characterized in that: The outer surface of the second breaking rod (303) is provided with a plurality of locking holes (303a), and the locking holes (303a) are provided in correspondence with the locking head (401).

4. The die for gasket processing according to claim 3, characterized in that: The main body (301) has a plurality of mounting holes (301a) that extend horizontally through it. The position of the mounting holes (301a) corresponds to the locking holes (303a), and the locking head (401) is slidably disposed in the mounting holes (301a).

5. A die for gasket processing according to claim 3 or 4, characterized in that: The pressure rod (402) is provided with a vertically oriented long groove (402a). The two ends of the long groove (402a) are connected to the outer circumference of the pressure rod (402) by arc surfaces. The end of the locking head (401) away from the second breaking rod (303) is the contact end (401a), and the contact end (401a) is a hemispherical surface.

6. The mold for gasket processing according to claim 1, characterized in that: The lower mold (20) is also provided with a discharge channel (204), which includes a horizontal section (204a) and an inclined section (204b).

7. A die for gasket processing according to claim 6, characterized in that: The waste hole (202) is connected to the inclined section (204b).

8. A die for gasket processing according to claim 6, characterized in that: The waste hole (202) is connected to the horizontal section (204a), and a push block (50) is also provided in the horizontal section (204a), which can move horizontally.

9. A mold for gasket processing according to claim 2, characterized in that: The outer diameter of the second punch rod (303) is the same as the diameter of the mold hole (201), and the inner diameter of the second punch rod (303) is the same as the diameter of the first punch rod (302).

10. A die for gasket processing according to claim 2, characterized in that: The diameter of the first punch rod (302) is the same as the diameter of the waste hole (202).

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