CN113857338B - Caliper piston forming die - Google Patents

Caliper piston forming die Download PDF

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Publication number
CN113857338B
CN113857338B CN202111079130.5A CN202111079130A CN113857338B CN 113857338 B CN113857338 B CN 113857338B CN 202111079130 A CN202111079130 A CN 202111079130A CN 113857338 B CN113857338 B CN 113857338B
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China
Prior art keywords
die
groove
punch
forming
positioning
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CN202111079130.5A
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Chinese (zh)
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CN113857338A (en
Inventor
周陈伟
张明涛
潘高峰
管秋寒
杨霸豪
王书可
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Taizhou Baida Electric Equipment Co ltd
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Taizhou Baida Electric Equipment Co ltd
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Priority to CN202111079130.5A priority Critical patent/CN113857338B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/06—Stripping-off devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

The application relates to a caliper piston forming die which comprises a female die, a male die and a punch, wherein the female die is provided with a forming groove; the punch and the forming groove are coaxially arranged; the positioning sleeve is also included; the positioning sleeve is coaxially sleeved outside the punch in a sliding manner, and is connected with the male die in an axial sliding manner; the female die is also provided with a positioning groove which is coaxially arranged with the forming groove, and the positioning groove is communicated with one end of the forming groove, which faces the male die; the opening area of the positioning groove is larger than that of the forming groove, and the positioning groove is used for coaxially embedding the end part of the positioning sleeve. In the die assembly process, the end part of the positioning sleeve is coaxially embedded into the positioning groove, so that guiding and limiting are provided for the punch, the radial offset of the punch is limited by the positioning sleeve in the process that the punch extrudes a workpiece, the coaxiality of the punch and the forming groove is improved, and the position accuracy of a forming hole in a product is further improved.

Description

Caliper piston forming die
Technical Field
The application relates to the field of metal cold working, in particular to a caliper piston forming die.
Background
Cold stamping is a process in which a die is used to apply pressure to a material at normal temperature on a press to cause separation or deformation of the material, thereby obtaining a part of a certain shape, size and performance.
Referring to fig. 1, the product is cylindrical as a whole, one end of the product is coaxially provided with a forming hole, and the forming hole is a blind hole.
When a cylindrical workpiece is processed by using a cold stamping die to produce the product, the cold stamping die comprises a female die, a male die and a punch.
The female die is provided with a forming groove, and a solid cylindrical workpiece is arranged in the forming groove; the male die and the punch are close to the female die together, and the punch stretches into the forming groove to extrude the workpiece, so that a forming hole is formed in the workpiece, and a product is formed.
In the processing process, the outer diameter of the punch is equal to the inner diameter of the forming hole, and the inner diameter of the forming groove is equal to the outer diameter of the product, so that the periphery of the punch is not contacted with the inner wall of the forming groove; when the punch presses the workpiece, the reaction force of the workpiece to the punch may cause the punch to deviate, especially if the workpiece is inclined towards the end face of the punch, the punch will deviate obviously, and further the eccentricity between the punch and the forming groove is caused, so that the position accuracy (coaxiality) of the forming hole on the product cannot meet the requirement.
Disclosure of Invention
In order to improve the position accuracy of a forming hole on a product, the application provides a caliper piston forming die.
The application provides a caliper piston forming die, which adopts the following technical scheme:
The caliper piston forming die comprises a female die, a male die and a punch, wherein the female die is provided with a forming groove; the punch and the forming groove are coaxially arranged; the positioning sleeve is also included; the positioning sleeve is coaxially sleeved outside the punch in a sliding manner, and is connected with the male die in an axial sliding manner;
The female die is also provided with a positioning groove which is coaxially arranged with the forming groove, and the positioning groove is communicated with one end of the forming groove, which faces the male die; the opening area of the positioning groove is larger than that of the forming groove, and the positioning groove is used for coaxially embedding the end part of the positioning sleeve.
Through adopting above-mentioned technical scheme, in the compound die process, the tip coaxial embedding constant head tank in advance, and then provide direction and spacing for the drift to at the in-process of drift extrusion work piece, utilize the radial offset of spacer sleeve restriction drift, improve the axiality of drift and shaping groove, and then improve the position accuracy of shaping hole on the product.
Preferably, the positioning sleeve comprises a main body and a positioning part which are coaxially arranged; the end of the main body is used for abutting the female die, the positioning part is used for being embedded into the positioning groove, and the axial length of the positioning part is smaller than the groove depth of the positioning groove.
Through adopting above-mentioned technical scheme, calliper piston forming die during operation, the work piece is pressed in the shaping inslot and is warp and shaping, and when the locating sleeve embedding constant head tank, the main part restriction location portion embedding constant head tank's degree of depth avoids location portion to inlay to the shaping inslot, and then avoids interfering the deformation, the shaping of work piece.
Preferably, the device further comprises a guide rod; the axis of the guide rod is parallel to the axis of the positioning sleeve, and the guide rod is connected with the male die in an axial sliding manner; the positioning sleeve is fixedly connected to one end of the guide rod, which faces the female die;
The periphery of one end of the guide rod, which is far away from the female die, is provided with a step; when the step of the guide rod is abutted against the male die towards the surface of the female die, the length of the punch extending out of the positioning sleeve towards one end of the female die is smaller than the groove depth of the positioning groove.
By adopting the technical scheme, in the first aspect, the guide rod is utilized to provide guide for the movement of the positioning sleeve; in the second aspect, the step of the guide rod prevents the guide rod from separating from the male die, so that the positioning sleeve is prevented from separating from the punch; in the third aspect, when the step of the guide rod is abutted against the male die towards the surface of the female die, the length of the punch extending out of the positioning sleeve towards one end of the female die is smaller than the groove depth of the positioning groove, so that the end part of the positioning sleeve is ensured to be coaxially embedded into the positioning groove in the die assembly process of the male die and the female die, then the punch can extend into the forming groove, namely the positioning sleeve provides guiding and limiting for the punch, and then the punch can extrude a workpiece.
Preferably, the device further comprises a striking rod; the axis of the material beating rod is parallel to the axis of the positioning sleeve, and the material beating rod is connected with the male die in an axial sliding manner; one end of the material beating rod, facing the female die, is used for connecting a positioning sleeve;
A step is arranged at the periphery of one end, far away from the female die, of the material beating rod, and the surface, facing the female die, of the step of the material beating rod is used for abutting against the male die; and when the surface of the step of the striking rod facing the female die is abutted against the male die, the distance between the end surface of the locating sleeve facing the female die and the end surface of the punch facing the female die is smaller than the hole depth of the forming hole of the product.
By adopting the technical scheme, when the die is assembled, the punch is matched with the inner wall of the forming groove to extrude the workpiece together so as to form a product, and then the inner periphery of the product forming hole is attached to the outer periphery of the punch; when the die is opened, friction force between the inner periphery of the product forming hole and the outer periphery of the punch head can cause the product to be sleeved on the punch head, at the moment, the material beating rod is driven to move towards the direction close to the female die, and then the material beating rod pushes the positioning sleeve to move towards the direction close to the female die, and the positioning sleeve pushes the product sleeved on the punch head towards one end of the female die, so that the product is taken down from the punch head.
Preferably, the material beating rods are uniformly arranged in a plurality along the circumferential direction of the positioning sleeve.
Through adopting above-mentioned technical scheme, a plurality of striking rods collaborative work to promote the position sleeve removal, and make the position sleeve atress even, avoid the position sleeve to produce too big moment and lead to the drift to take place bending deformation.
Preferably, the device further comprises a pressure member; the pressure piece is connected with the male die in a sliding manner along the axial direction of the material beating rods, and the surface of the pressure piece, facing the female die, is used for abutting all the end faces, facing away from the female die, of the material beating rods.
Through adopting above-mentioned technical scheme, promote all the beating rods synchronous motion simultaneously through the pressure spare to realize the collaborative work of a plurality of beating rods.
Preferably, the male die is located above the female die, and the axis of the punch is vertical.
By adopting the technical scheme, when the die is closed, the gravity of the male die is matched with the driving force of the punching machine to drive the male die to move downwards so as to finish extruding and forming the workpiece; when the die is opened, if the product is sleeved on the punch, the positioning sleeve and the material beating rod move downwards under the action of gravity so as to push the product sleeved on the punch downwards, and then the product is taken down from the punch.
Preferably, the female die is further provided with an air containing groove, the air containing groove is arranged at the bottom of the forming groove, and the air containing groove is positioned at the edge of the bottom of the forming groove.
Through adopting above-mentioned technical scheme, during the compound die, the inner wall of drift cooperation shaping groove extrudees the work piece together, and there are two kinds of possibilities in the deformation process of work piece: 1. the middle part of the workpiece in the axial direction is firstly expanded and deformed and is attached to the inner wall of the forming groove, at the moment, a gap exists between the periphery of one end of the workpiece, which is far away from the male die, and the inner wall of the forming groove, and air exists in the gap; 2. the punch presses one end of the workpiece facing the punch, the end of the punch is embedded into the workpiece, the end of the workpiece facing the punch is firstly expanded and deformed and is attached to the inner wall of the forming groove, at the moment, a gap exists between the periphery of one end of the workpiece far away from the punch and the inner wall of the forming groove, and air exists in the gap;
Of the two possibilities mentioned above, there are both: a gap exists between the periphery of one end of the workpiece far away from the male die and the inner wall of the forming groove, and air exists in the gap, so that the periphery of the workpiece is gradually attached to the inner wall of the forming groove in the process that the punch cooperates with the inner wall of the forming groove to extrude the workpiece together, and the air is pressed into the air accommodating groove, so that the periphery of a product is processed by utilizing the inner wall of the forming groove;
on the other hand, when the mold is opened, friction force between the outer periphery of the product and the inner wall of the molding groove may cause the product to be embedded in the molding groove, and at this time, compressed air in the air accommodating groove can assist the product to be separated from the molding groove.
Preferably, the female die comprises a die holder and a die core; the die holder is provided with a mounting hole;
The mold core is embedded in the mounting hole, and the end face of the mold core facing the male mold and the inner Zhou Gewei of the mounting hole form the forming groove; the air containing groove is arranged on the periphery of one end of the mold core, which faces the male mold, and penetrates through the mold core in the direction close to the male mold.
By adopting the technical scheme, on one hand, the processing and forming of the air accommodating groove are facilitated; on the other hand, the mold cores with different end surface shapes can be replaced according to the production requirements of products.
Preferably, the device further comprises a material returning rod, wherein the axis of the material returning rod is parallel to or coincident with the axis of the forming groove; the material returning rod is connected with the female die in an axial sliding manner, and one end of the material returning rod, which faces the male die, is used for extending into the forming groove;
a step is arranged on the periphery of one end, far away from the male die, of the material returning rod; when the step of the material returning rod is propped against the female die from the surface of the male die, the end face of the material returning rod facing the male die is flush with the bottom of the forming groove; when the step of the material returning rod is abutted against the female die towards the surface of the male die, the material returning rod extends out of the female die towards the end face of the male die.
By adopting the technical scheme, when the die is assembled, the punch is matched with the inner wall of the forming groove to extrude the workpiece together so as to form a product, and then the periphery of the product is attached to the inner wall of the forming groove; when the die is opened, friction force between the periphery of the product and the inner wall of the forming groove can possibly cause the product to be embedded in the forming groove, at the moment, the material returning rod is driven to move towards the direction close to the male die, and then the material returning rod pushes the product to be separated from the forming groove, so that the product is taken out from the forming groove.
In summary, the present application includes at least one of the following beneficial technical effects:
1. in the die assembly process, the end part of the positioning sleeve is coaxially embedded into the positioning groove, so that guiding and limiting are provided for the punch, the radial deflection of the punch is limited by the positioning sleeve in the process that the punch extrudes a workpiece, the coaxiality of the punch and the forming groove is improved, and the position accuracy of a forming hole on a product is further improved;
2. When the die is opened, if the product is sleeved on the punch, the pressure piece, the material beating rod, the guide rod and the positioning sleeve move downwards under the action of gravity so as to push the product sleeved on the punch downwards, and then the product is taken down from the punch.
Drawings
Fig. 1 is a schematic structural view of a product.
Fig. 2 is a cross-sectional view of a caliper piston forming die.
FIG. 3 is a schematic view of a guide rod, a positioning sleeve, a striking rod, and a pressure member.
Fig. 4 is an enlarged view at a in fig. 2.
Fig. 5 is a schematic structural view of the mold core.
Reference numerals illustrate: 1. a female die; 11. a forming groove; 12. a positioning groove; 13. a base; 14. a die holder; 15. a mold core; 16. a mounting hole; 17. a gas containing groove; 2. a male die; 3. a punch; 4. a guide rod; 5. a positioning sleeve; 51. a main body; 52. a positioning part; 6. a striking rod; 7. a pressure member; 71. a pressure block; 72. a pressure shaft; 8. a material returning rod; 9. and (5) a push rod.
Detailed Description
The application is described in further detail below with reference to fig. 1-5.
Referring to fig. 1, the product is cylindrical as a whole, one end of the product is coaxially provided with a forming hole, and the forming hole is a blind hole.
The embodiment of the application discloses a caliper piston forming die which is arranged on a punching machine and is used for processing a solid cylindrical workpiece into the product.
Referring to fig. 2, the caliper piston forming die includes a female die 1, a male die 2, and a punch 3. The female die 1 is provided with a forming groove 11, the inner diameter of the forming groove 11 is equal to the outer diameter of the product, and the axis of the forming groove 11 is vertically arranged. The male die 2 is positioned right above the female die 1; the punch 3 is fixedly connected to the lower end of the punch 2, the axis of the punch 3 coincides with the axis of the forming groove 11, and meanwhile, the outer diameter of the punch 3 is equal to the inner diameter of a product forming hole.
When the die is in operation, a solid cylindrical workpiece is placed in the forming groove 11, the male die 2 vertically moves downwards to enable the punch 3 to extend into the forming groove 11, the punch 3 is matched with the inner wall of the forming groove 11 to extrude the workpiece, and the workpiece is pressed and deformed to be simultaneously attached to the periphery of the punch 3 and the inner wall of the forming groove 11 so as to form a product.
When the punch 3 presses the workpiece, the reaction force of the workpiece to the punch 3 may cause the punch 3 to radially deviate, so as to limit the radial deviation of the punch 3, the upper surface of the die 1 is further provided with a positioning groove 12, and meanwhile, the caliper piston forming die further comprises a guide rod 4 and a positioning sleeve 5.
The positioning groove 12 is coaxially arranged with the forming groove 11, and the positioning groove 12 is communicated with the upper end of the forming groove 11. Meanwhile, the inner diameter of the positioning groove 12 is larger than that of the forming groove 11, and a chamfer is arranged between the inner wall of the positioning groove 12 and the inner wall of the forming groove 11 so that a workpiece put into the opening of the positioning groove 12 falls into the forming groove 11.
Referring to fig. 2 and 3, the positioning sleeve 5 is coaxially and slidably sleeved outside the punch 3, the positioning sleeve 5 comprises a main body 51 and a positioning portion 52 which are integrally formed, the main body 51 is disc-shaped, and the positioning portion 52 is annular; the positioning portion 52 is disposed coaxially with the main body 51, and the positioning portion 52 is located at the lower end of the main body 51. Meanwhile, the outer diameter of the positioning portion 52 is equal to the inner diameter of the positioning groove 12, and the axial length of the positioning portion 52 is smaller than the groove depth of the positioning groove 12; and the outer diameter of the main body 51 is larger than the inner diameter of the positioning groove 12, the lower end surface of the main body 51 is used for abutting against the upper surface of the female die 1.
The axis of the guide rod 4 is vertically arranged, the guide rod 4 is vertically connected with the male die 2 in a sliding manner, and the upper end of the guide rod 4 is embedded in the male die 2 in a sliding manner; in this embodiment, three guide rods 4 are uniformly arranged along the circumferential direction of the punch 3.
The positioning sleeve 5 is fixedly connected to the lower end of the guide rod 4; the periphery of the upper end of the guide rod 4 is provided with a step; when the lower surface of the step of the guide rod 4 abuts against the male die 2, the lower end of the punch 3 extends out of the positioning sleeve 5 to a length smaller than the groove depth of the positioning groove 12.
In this embodiment, the male die 2 is provided with a guide stepped hole, and one end of the guide stepped hole with a larger diameter is upward, and the guide rod 4 is coaxially and slidably embedded in the guide stepped hole.
When the male die 2 is far away from the female die 1 (in the die opening state), the positioning sleeve 5 and the guide rod 4 move to the lowest position relative to the male die 2 (the punch 3) under the action of gravity, namely the lower surface of the step of the guide rod 4 is abutted against the male die 2, and at the moment, the length of the lower end of the punch 3 extending out of the positioning sleeve 5 is smaller than the groove depth of the positioning groove 12.
When the punch works, a solid cylindrical workpiece is placed in a forming groove 11, a punch 2 vertically moves downwards, and the lower end of the punch 3 firstly stretches into a positioning groove 12; subsequently, the male die 2 continues to move downwards, so that the lower end of the positioning part 52 extends into the positioning groove 12, and the lower end of the punch 3 is still positioned in the positioning groove 12, namely, in the state, the periphery of the positioning part 52 is matched with the inner wall of the positioning groove 12, so that the radial movement of the positioning sleeve 5 is limited, the guiding and the radial limiting of the punch 3 are realized by utilizing the positioning sleeve 5, and the lower end of the punch 3 still does not touch a workpiece at the moment; then, the punch 2 continues to move downward, the positioning portion 52 is completely embedded into the positioning groove 12, and the punch 3 moves downward under the guiding and radial limiting actions of the positioning sleeve 5 to press the workpiece.
The punch 3 presses the work piece in cooperation with the inner wall of the forming groove 11, and the work piece is deformed by pressing to simultaneously fit the outer periphery of the punch 3 and the inner wall of the forming groove 11, so as to form a product. After the completion of the processing, when the die is opened, friction force between the inner periphery of the product molding hole and the outer periphery of the punch 3 may cause the product to be sleeved on the punch 3, or friction force between the outer periphery of the product and the inner wall of the molding groove 11 may cause the product to be embedded in the molding groove 11.
Referring to fig. 2 and 3, the cold stamping die further includes a striking rod 6 and a pressing member 7 for the case where the product is sleeved on the punch 3.
The axis of the striking rod 6 is vertically arranged, and the striking rod 6 is vertically connected with the male die 2 in a sliding manner. The lower end of the striking rod 6 is used for connecting the locating sleeve 5. A plurality of material beating rods 6 are uniformly arranged along the circumferential direction of the punch 3; in the embodiment, three striking rods 6 are uniformly arranged along the circumferential direction of the punch 3 and are in one-to-one correspondence with the guide rods 4, and the axis of the striking rod 6 is coincident with the axis of the guide rod 4; simultaneously, the striking rod 6 is integrally and slidably embedded in the male die 2, and the lower end of the striking rod 6 is used for abutting against the upper end of the guide rod 4.
The periphery of the upper end of the striking rod 6 is provided with a step, and when the lower surface of the step of the striking rod 6 is abutted against the male die 2, the distance between the lower end face of the positioning sleeve 5 and the lower end face of the punch 3 is smaller than the hole depth of a forming hole of a product. In the embodiment, the male die 2 is provided with a punching step hole, the punching step hole and the guide step hole are coaxially arranged, one end of the punching step hole with larger diameter is upward, and the punching rod 6 is coaxially and slidably embedded in the punching step hole; when the lower surface of the step of the striking rod 6 abuts against the punch 2 and the lower surface of the step of the guide rod 4 abuts against the punch 2, a gap exists between the lower end surface of the striking rod 6 and the upper end surface of the guide rod 4.
The pressure piece 7 is connected with the male die 2 in a sliding way along the axial direction of the striking rod 6, and the pressure piece 7 comprises a pressure block 71 and a pressure shaft 72; the lower surface of the pressure block 71 is used for simultaneously abutting against the upper end surfaces of all the striking rods 6, and the pressure block 71 is integrally and slidably embedded in the male die 2. The pressure shaft 72 is vertically arranged, the lower end face of the pressure shaft 72 is connected with the upper surface of the pressure block 71, and the upper end of the pressure shaft 72 extends upwards out of the male die 2.
When the die is opened, if the product is sleeved on the punch 3, the pressure piece 7, the material beating rod 6, the guide rod 4 and the positioning sleeve 5 move downwards under the action of gravity so as to push the product sleeved on the punch 3 downwards, and then the product is taken down from the punch 3. Meanwhile, if the gravity alone is insufficient to remove the product from the punch 3, the cylinder may apply downward thrust to the pressure shaft 72 to effect removal of the product from the punch 3.
Referring to fig. 2, the cold stamping die further includes a stripper bar 8 and a carrier bar 9 for the product inserted into the forming groove 11.
The axis of the material returning rod 8 is vertical; the material returning rod 8 is vertically connected with the female die 1 in a sliding manner, and the upper end of the material returning rod 8 is used for extending into the forming groove 11. Meanwhile, in this embodiment, the axis of the material returning lever 8 coincides with the axis of the forming groove 11.
The lower end of the material returning rod 8 is slidably embedded in the female die 1, and the periphery of the lower end of the material returning rod 8 is provided with a step; when the lower surface of the step of the material returning rod 8 is abutted against the female die 1, the upper end surface of the material returning rod 8 is level with the bottom of the forming groove 11; when the upper surface of the step of the material returning rod 8 is abutted against the female die 1, the upper end of the material returning rod 8 extends out of the female die 1 upwards from the positioning groove 12.
The axis of the ejector rod 9 is vertical and is coaxially arranged with the material returning rod 8; the ejector rod 9 is vertically connected with the female die 1 in a sliding manner, the upper end of the ejector rod 9 is embedded in the female die 1 in a sliding manner, and the upper end face of the ejector rod 9 is used for abutting against the lower end face of the material returning rod 8; at the same time, the lower end of the ejector rod 9 extends downwards out of the female die 1.
When the mold is opened, if the product is embedded in the molding groove 11, upward thrust can be applied to the ejector rod 9 through the air cylinder, and then the product is ejected out of the molding groove 11 through the material returning rod 8.
Referring to fig. 2 and 4, the female die 1 comprises a base 13, a die holder 14 and a die core 15; the die holder 14 is fixedly connected with the base 13, the die holder 14 is provided with a mounting hole 16, the mounting hole 16 is a stepped hole, and meanwhile, one end of the mounting hole 16 with a larger diameter is downward. The mold core 15 is embedded in the mounting hole 16 from bottom to top, and the upper end surface of the mold core 15 and the inner Zhou Gewei of the mounting hole 16 form the molding groove 11, i.e. the upper end surface of the mold core 15 is the bottom of the molding groove 11. At the same time, the lower end face of the mold core 15 abuts against the surface of the base 13.
Referring to fig. 4 and 5, the periphery of the upper end of the mold core 15 is provided with a plurality of air accommodating grooves 17, and the air accommodating grooves 17 penetrate the upper end surface of the mold core 15 upwards; at the same time, the ejector pin 8 slides through the mould core 15.
On the one hand, in the process that the punch 3 is matched with the inner wall of the forming groove 11 to extrude the workpiece together, the periphery of the workpiece is gradually attached to the inner wall of the forming groove 11, and air is pressed into the air accommodating groove 17, so that the periphery of a product is processed by utilizing the inner wall of the forming groove 11; on the other hand, when the mold is opened, friction force between the outer periphery of the product and the inner wall of the molding groove 11 may cause the product to be embedded in the molding groove 11, and at this time, compressed air in the air accommodating groove 17 may assist the product to be separated from the molding groove 11.
The embodiment of the application provides a caliper piston forming die, which has the implementation principle that: in the die assembly process, the end part of the positioning sleeve 5 is firstly coaxially embedded into the positioning groove 12, so that guiding and limiting are provided for the punch 3, the radial deflection of the punch 3 is limited by the positioning sleeve 5 in the process that the punch 3 extrudes a workpiece, the coaxiality of the punch 3 and the forming groove 11 is improved, and the position accuracy of a forming hole on a product is further improved;
When the die is opened, if the product is sleeved on the punch 3, the pressure piece 7, the material beating rod 6, the guide rod 4 and the positioning sleeve 5 move downwards under the action of gravity so as to push the product sleeved on the punch 3 downwards, and then the product is taken down from the punch 3; meanwhile, the cylinder can apply upward thrust to the ejector rod 9, and then the product is ejected out of the forming groove 11 through the material returning rod 8.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (6)

1. The caliper piston forming die comprises a female die (1), a male die (2) and a punch (3), wherein the female die (1) is provided with a forming groove (11); the punch (3) and the forming groove (11) are coaxially arranged; the method is characterized in that: the device also comprises a positioning sleeve (5); the positioning sleeve (5) is coaxially sleeved outside the punch (3) in a sliding manner, and the positioning sleeve (5) is axially connected with the punch (2) in a sliding manner;
The female die (1) is also provided with a positioning groove (12), the positioning groove (12) and the forming groove (11) are coaxially arranged, and the positioning groove (12) is communicated with one end of the forming groove (11) facing the male die (2); the opening area of the positioning groove (12) is larger than that of the forming groove (11);
the female die (1) is also provided with an air accommodating groove (17), the air accommodating groove (17) is arranged at the bottom of the forming groove (11), and the air accommodating groove (17) is positioned at the edge of the bottom of the forming groove (11);
The female die (1) comprises a die holder (14) and a die core (15); the die holder (14) is provided with a mounting hole (16);
The mold core (15) is embedded in the mounting hole (16), and the end surface of the mold core (15) facing the male mold (2) and the inner Zhou Gewei of the mounting hole (16) form the forming groove (11); the air accommodating groove (17) is formed in the periphery of one end, facing the male die (2), of the die core (15), and the air accommodating groove (17) penetrates through the die core (15) in a direction approaching the male die (2);
In the process that the punch (3) is matched with the inner wall of the forming groove (11) to extrude the workpiece, the periphery of the workpiece is gradually attached to the inner wall of the forming groove (11) and air is pressed into the air accommodating groove (17); when the mould is opened, air in the air accommodating groove (17) is used for pushing the product to separate from the forming groove (11);
The positioning sleeve (5) comprises a main body (51) and a positioning part (52) which are coaxially arranged; the end part of the main body (51) is used for abutting against the female die (1), the positioning part (52) is used for being coaxially embedded into the positioning groove (12), and the axial length of the positioning part (52) is smaller than the groove depth of the positioning groove (12);
Also comprises a guide rod (4); the axis of the guide rod (4) is parallel to the axis of the positioning sleeve (5), and the guide rod (4) is connected with the male die (2) in an axial sliding manner; the positioning sleeve (5) is fixedly connected to one end of the guide rod (4) facing the female die (1);
the periphery of one end, far away from the female die (1), of the guide rod (4) is provided with a step; when the step of the guide rod (4) is abutted against the male die (2) towards the surface of the female die (1), the length of the punch (3) extending out of the positioning sleeve (5) towards one end of the female die (1) is smaller than the groove depth of the positioning groove (12).
2. The caliper piston forming die of claim 1, wherein: the device also comprises a material beating rod (6); the axis of the material beating rod (6) is parallel to the axis of the positioning sleeve (5), and the material beating rod (6) is connected with the male die (2) in an axial sliding way; one end of the material beating rod (6) facing the female die (1) is used for connecting a positioning sleeve (5);
the periphery of one end, far away from the female die (1), of the material beating rod (6) is provided with a step, and the surface, facing the female die (1), of the step of the material beating rod (6) is used for abutting against the male die (2); and when the step of the striking rod (6) is abutted against the male die (2) towards the surface of the female die (1), the distance between the end face of the locating sleeve (5) towards the female die (1) and the end face of the punch (3) towards the female die (1) is smaller than the hole depth of the forming hole of the product.
3. The caliper piston forming die of claim 2, wherein: the material beating rods (6) are uniformly arranged along the circumference of the positioning sleeve (5).
4. A caliper piston forming die according to claim 3, wherein: also comprises a pressure piece (7); the pressure piece (7) is connected with the male die (2) in a sliding manner along the axial direction of the material beating rod (6), and the surface of the pressure piece (7) facing the female die (1) is used for abutting against the end surfaces of all the material beating rods (6) facing away from the female die (1).
5. The caliper piston forming die of claim 2, wherein: the male die (2) is located above the female die (1), and the axis of the punch (3) is vertical.
6. The caliper piston forming die of claim 1, wherein: the material returning device also comprises a material returning rod (8), wherein the axis of the material returning rod (8) is parallel to or coincident with the axis of the forming groove (11); the material returning rod (8) is connected in the female die (1) in an axial sliding manner, one end of the material returning rod (8) facing the male die (2) is used for extending into the forming groove (11), and the material returning rod (8) penetrates through the die core (15) in a sliding manner.
CN202111079130.5A 2021-09-15 2021-09-15 Caliper piston forming die Active CN113857338B (en)

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Citations (9)

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EP0419428A1 (en) * 1989-09-18 1991-03-27 SKF Tools AB Cutting tools such as drills, reamers, end mills and the like
CN1554499A (en) * 2003-12-23 2004-12-15 哈尔滨工业大学 Mini floating mold device for mini part precision formation
CN1698994A (en) * 2005-06-17 2005-11-23 哈尔滨工业大学 Minisize mould device for precise compound forming of minisize double gears
CN102284635A (en) * 2011-09-07 2011-12-21 安徽中鼎精工技术有限公司 Gasket fine blanking die for common punch press
CN105251893A (en) * 2015-12-01 2016-01-20 江西江铃底盘股份有限公司 Punching-trimming matched die for rear axle oil baffle disc and machining process of die
CN205043005U (en) * 2015-09-25 2016-02-24 河南航天精工制造有限公司 Interior hexagonal hole stamping die
CN107433300A (en) * 2017-08-01 2017-12-05 中国兵器工业第五九研究所 A kind of open die cavity mold for extruding and forming
CN208527821U (en) * 2018-07-04 2019-02-22 深圳市金永鑫精密五金制品有限公司 High-precision hardware stamping precision die
CN112496167A (en) * 2020-11-19 2021-03-16 肖惠君 Gas transfer type stamping lower die easy to demould

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0419428A1 (en) * 1989-09-18 1991-03-27 SKF Tools AB Cutting tools such as drills, reamers, end mills and the like
CN1554499A (en) * 2003-12-23 2004-12-15 哈尔滨工业大学 Mini floating mold device for mini part precision formation
CN1698994A (en) * 2005-06-17 2005-11-23 哈尔滨工业大学 Minisize mould device for precise compound forming of minisize double gears
CN102284635A (en) * 2011-09-07 2011-12-21 安徽中鼎精工技术有限公司 Gasket fine blanking die for common punch press
CN205043005U (en) * 2015-09-25 2016-02-24 河南航天精工制造有限公司 Interior hexagonal hole stamping die
CN105251893A (en) * 2015-12-01 2016-01-20 江西江铃底盘股份有限公司 Punching-trimming matched die for rear axle oil baffle disc and machining process of die
CN107433300A (en) * 2017-08-01 2017-12-05 中国兵器工业第五九研究所 A kind of open die cavity mold for extruding and forming
CN208527821U (en) * 2018-07-04 2019-02-22 深圳市金永鑫精密五金制品有限公司 High-precision hardware stamping precision die
CN112496167A (en) * 2020-11-19 2021-03-16 肖惠君 Gas transfer type stamping lower die easy to demould

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