CN210547765U - Bolt head broaching cold heading forming die - Google Patents
Bolt head broaching cold heading forming die Download PDFInfo
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- CN210547765U CN210547765U CN201921421108.2U CN201921421108U CN210547765U CN 210547765 U CN210547765 U CN 210547765U CN 201921421108 U CN201921421108 U CN 201921421108U CN 210547765 U CN210547765 U CN 210547765U
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Abstract
The utility model relates to the technical field of a hole drawing die, in particular to a bolt head hole drawing cold heading forming die, which comprises a die outer sleeve, a locking nut, a punching rod fixing piece, a sleeve ejecting piece, a punching rod and a sleeve; the locking nut is coaxially arranged at the top end of the die outer sleeve, the punching rod fixing piece is fixedly arranged at the top end of the interior of the die outer sleeve, the top surface of the rod fixing piece is abutted against the bottom surface of the locking nut, the punching rod is coaxially arranged in the die outer sleeve, and the non-working end of the punching rod is fixedly connected with the punching rod fixing piece; the sleeve ejecting piece can be vertically installed inside the locking nut in a lifting mode, the working end of the sleeve ejecting piece penetrates through the punching rod fixing piece and abuts against the top surface of the sleeve, and the sleeve is sleeved on the outer side of the punching rod; the die can tightly press the flange of the bolt head on the lower die to prevent the flange from moving in the process of broaching the bolt head of the flange; when the die is used for broaching, the bolt head can be extruded out of the working end of the punch rod through the sleeve in the process of separating from the bolt head, so that the bolt head is separated from the punch rod.
Description
Technical Field
The utility model relates to a broaching die technical field, concretely relates to bolt head broaching cold-heading forming die.
Background
The traditional head forming die consists of a die outer sleeve, a punch core, a punch rod and a cushion block, and after the flange bolt cold heading head is subjected to broaching forming, the head cannot be separated from the punch rod.
For example, chinese patent CN205702116U discloses a chain plate broaching trimming die, which comprises a lower die holder and an upper die holder, wherein the lower die holder is provided with a female die, a male die fixing plate is arranged below the upper die holder, the bottom of the male die fixing plate is provided with two broaching trimming male dies, the female die and the broaching trimming male dies are matched with each other, and the bottom of the broaching trimming male dies is provided with a broach.
When the broach of the die is used for demolding, materials are pressed through the pressure plate, so that in the process of lifting the broach, the pressure plate presses the materials to enable the materials not to move upwards along with the broach, and the broach and the materials are separated.
However, in the process of cold heading the head of the flange bolt, because the head of the flange bolt needs to be formed by cold heading with the die, the bolt cannot be fixed by using a certain pressing mechanism, so that the punch rod can be separated from the head of the bolt, a clamping mechanism or a threaded connection mechanism is often used for fixing the bolt in the prior art, and then the head of the bolt is formed by cold heading.
However, in the process of cold heading the head of the bolt, the thread of the bolt is damaged, so that the clamping force can be adjusted by a worker, but the rod part of the bolt cannot be well clamped by the small clamping force, so that in the process of rising the punch rod, the bolt head rises along with the punch rod, and the bolt head and the punch rod cannot be separated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a bolt head broaching cold heading forming die, which can tightly support a flange of a bolt head on a lower die to make the flange immovable in the process of broaching the flange bolt head; when the die is used for broaching, the bolt head can be extruded out of the working end of the punch rod through the sleeve in the process of separating from the bolt head, so that the bolt head is separated from the punch rod.
To achieve the purpose, the utility model adopts the following technical proposal:
the bolt head broaching cold heading forming die comprises a die outer sleeve, a locking nut, a punching rod fixing piece, a sleeve ejecting piece, a punching rod and a sleeve;
the die jacket and the locking nut are both in a cylindrical shape, the locking nut is coaxially arranged at the top end of the die jacket, and the outer circumferential surface of the locking nut is in threaded connection with the inner circumferential surface of the die jacket;
the punching rod fixing piece is fixedly arranged at the top end of the interior of the die outer sleeve, the top surface of the punching rod fixing piece is abutted against the bottom surface of the locking nut, the punching rod is coaxially arranged in the die outer sleeve, and the non-working end of the punching rod is fixedly connected with the punching rod fixing piece;
the sleeve ejecting piece can be vertically installed inside the locking nut in a lifting mode, the working end of the sleeve ejecting piece penetrates through the punching rod fixing piece and abuts against the top surface of the sleeve, and the sleeve is sleeved on the outer side of the punching rod;
under the working state, the working end of the punching rod is positioned outside the sleeve, and under the non-working state, the working end of the punching rod is positioned inside the sleeve.
The bolt head broaching cold heading forming die further comprises a positioning spacer bush, a stop sleeve and a spring, wherein the top end of the positioning spacer bush is provided with a first annular flange extending outwards in the radial direction;
the first annular flange is vertically and slidably arranged at the bottom end of the interior of the mold outer sleeve, and the positioning spacer sleeve is sleeved on the outer side of the sleeve;
the stopping sleeve is fixedly arranged at the middle end in the die outer sleeve, the stopping sleeve is positioned between the punching rod fixing piece and the positioning spacer sleeve, the top surface of the stopping sleeve abuts against the bottom surface of the punching rod fixing piece, and a gap is reserved between the bottom surface of the stopping sleeve and the top surface of the positioning spacer sleeve;
the spring is installed in the stopping sleeve, and two ends of the spring are respectively abutted to the bottom surface of the punch rod fixing piece and the top surface of the positioning spacer bush.
As a preferred scheme of a bolt head broaching cold heading forming die, the punching rod fixing piece comprises a second cushion block and a third cushion block, the second cushion block and the third cushion block are fixedly installed at the top end of the inner portion of the die sleeve, the second cushion block is arranged above the third cushion block, the bottom surface of the second cushion block is abutted to the top surface of the third cushion block, the punching rod is installed inside the third cushion block in an embedded mode, a second annular flange extending outwards in the radial direction is arranged at the top of the punching rod, a countersunk through hole in transition fit with the outer circumferential surface of the punching rod and the second annular flange is formed in the third cushion block, and the top surface of the punching rod is abutted to the bottom surface of the second cushion block.
As a preferred scheme of a bolt head hole-drawing cold-heading forming die, the sleeve ejector piece comprises a first cushion block and a plurality of ejector pins, the first cushion block is arranged in the locking nut in a liftable mode, a third annular flange extending outwards in the radial direction is arranged at the top end of the sleeve, two ends of each ejector pin abut against the bottom surface of the first cushion block and the top surface of the third annular flange respectively, through holes for the ejector pins to penetrate through are formed in the second cushion block and the third cushion block, and the ejector pins are uniformly distributed around the axis of the sleeve.
As a preferable scheme of the bolt head broaching and cold heading forming die, the top end of the locking nut is provided with a fourth annular flange extending outwards in the radial direction.
As a preferable mode of the bolt head broaching cold heading forming die, a distance between the bottom surface of the fourth annular flange and the bottom surface of the lock nut is smaller than an axial length of the inner circumferential surface thread of the die outer sleeve.
The utility model has the advantages that:
the hydraulic equipment drives the locking nut to drive the die outer sleeve to vertically move downwards and move towards the bolt head, the bottom surface of the positioning spacer firstly abuts against the top surface of the flange at the edge of the bolt head, and then the bottom surface of the sleeve contacts with the top surface of the bolt head;
in the process of the whole vertical lifting of the die, the positioning spacer sleeve slides upwards in the die outer sleeve until the top surface of the positioning spacer sleeve abuts against the bottom surface of the stop sleeve, the stop sleeve is in a compressed state at the moment, the gap distance between the positioning spacer sleeve and the stop sleeve is the stroke of the positioning spacer sleeve, and the stroke of the positioning spacer sleeve is the depth of a pull hole of a bolt head;
when the hole is pulled, the top surface of the bolt head firstly abuts against the bottom surface of the sleeve, the sleeve is jacked upwards by the bolt head, the sleeve moves upwards and drives the sleeve jacking piece to move upwards together so as to expose the punching rod, the mold continues to move downwards integrally, and the punching rod abuts against the top surface of the bolt head and starts the hole pulling process;
the positioning spacer sleeve always abuts against the top surface of the flange at the edge of the bolt head under the action of resilience force of the spring in the process that the punch rod pulls the bolt head, so that the bolt head cannot lift along with the punch rod in the process of pulling the bolt head;
after the hole is drawn, the hydraulic equipment drives the locking nut to drive the die outer sleeve to vertically move upwards, when the die integrally moves upwards, the top surface of the sleeve ejection piece abuts against the hydraulic equipment and stops moving, the die continues to integrally move upwards, the punching rod moves upwards along with the punching rod fixing piece, and the sleeve stops moving under the action of the sleeve ejection piece so that the bolt head is ejected out of the punching rod, and the bolt head and the punching rod are separated.
1. The die can tightly press the flange of the bolt head on the lower die to prevent the flange from moving in the process of broaching the bolt head of the flange;
2. when the die is used for broaching, the bolt head can be extruded out of the working end of the punch rod through the sleeve in the process of separating from the bolt head, so that the bolt head is separated from the punch rod.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a non-operating state front view of a bolt head broaching cold heading forming die according to an embodiment of the present invention.
3 fig. 3 2 3 is 3a 3 sectional 3 view 3 taken 3 along 3a 3- 3a 3 of 3 fig. 3 1 3. 3
Fig. 3 is an elevation view of the working state of the bolt head broaching cold heading forming die according to the embodiment of the present invention.
Fig. 4 is a sectional view taken along line B-B of fig. 3.
Fig. 5 is an exploded perspective view of a punch rod and a punch rod fixing member of a bolt head broaching cold heading forming die according to an embodiment of the present invention.
Fig. 6 is a perspective view of the sleeve and the sleeve ejecting member of the bolt head broaching cold heading forming die according to the embodiment of the present invention.
In the figure:
1. sleeving a mold sleeve;
2. locking the nut; 2a, a fourth annular flange;
3. a punch bar fixing piece; 3a, a second cushion block; 3b, a third cushion block; 3b1, countersunk through holes;
4. a cannula ejection member; 4a, a first cushion block; 4b, a thimble;
5. punching a rod; 5a, a second annular flange;
6. a sleeve; 6a, a third annular flange;
7. positioning the spacer bush; 7a, a first annular flange;
8. a stop sleeve;
9. a spring.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 6, the bolt head broaching cold heading forming die comprises a die outer sleeve 1, a locking nut 2, a punch fixing piece 3, a sleeve ejecting piece 4, a punch 5 and a sleeve 6;
the die outer sleeve 1 and the locking nut 2 are both in a cylindrical shape, the locking nut 2 is coaxially arranged at the top end of the die outer sleeve 1, and the outer circumferential surface of the locking nut 2 is in threaded connection with the inner circumferential surface of the die outer sleeve 1;
the punching rod fixing piece 3 is fixedly arranged at the top end of the interior of the die outer sleeve 1, the top surface of the punching rod fixing piece 3 is abutted against the bottom surface of the locking nut 2, the punching rod 5 is coaxially arranged in the die outer sleeve 1, and the non-working end of the punching rod 5 is fixedly connected with the punching rod fixing piece 3;
the sleeve ejecting piece 4 can be vertically installed inside the locking nut 2 in a lifting mode, the working end of the sleeve ejecting piece 4 penetrates through the punch fixing piece 3 and abuts against the top surface of the sleeve 6, and the sleeve 6 is sleeved on the outer side of the punch 5;
in the working state, the working end of the punching rod 5 is positioned outside the sleeve 6, and in the non-working state, the working end of the punching rod 5 is positioned inside the sleeve 6.
A first step for preventing the punch rod fixing piece 3 from moving downwards is arranged in the die outer sleeve 1, and the locking nut 2 is used for preventing the punch rod fixing piece 3 from moving upwards, so that the punch rod 5 is fixedly connected with the die outer sleeve 1 through the punch rod fixing piece 3;
the hydraulic equipment drives the locking nut 2 to drive the die outer sleeve 1 to vertically move downwards and move towards the bolt head, the top surface of the bolt head firstly abuts against the bottom surface of the sleeve 6, the sleeve 6 is jacked upwards by the bolt head, and the sleeve 6 moves upwards and drives the sleeve liftout piece 4 to move upwards together so as to expose the punch rod 5;
the die continues to integrally move downwards, the punch rod 5 abuts against the top surface of the bolt head and the hole drawing process is started; after the hole is drawn, the hydraulic equipment drives the locking nut 2 to drive the die outer sleeve 1 to vertically move upwards, when the die integrally moves upwards, the top surface of the sleeve ejection piece 4 abuts against the hydraulic equipment and stops moving, the die continues to integrally move upwards, the punching rod 5 moves upwards along with the punching rod fixing piece 3, and the sleeve 6 stops moving under the action of the sleeve ejection piece 4 so as to eject the bolt head from the punching rod 5, so that the bolt head is separated from the punching rod 5.
The positioning device also comprises a positioning spacer 7, a stop sleeve 8 and a spring 9, wherein the top end of the positioning spacer 7 is provided with a first annular flange 7a which extends outwards in the radial direction;
the first annular flange 7a is vertically and slidably arranged at the bottom end of the interior of the die outer sleeve 1, and the positioning spacer 7 is sleeved on the outer side of the sleeve 6;
the stopping sleeve 8 is fixedly arranged at the middle end in the die outer sleeve 1, the stopping sleeve 8 is positioned between the punching rod fixing piece 3 and the positioning spacer 7, the top surface of the stopping sleeve 8 abuts against the bottom surface of the punching rod fixing piece 3, and a gap is reserved between the bottom surface of the stopping sleeve 8 and the top surface of the positioning spacer 7;
the spring 9 is arranged in the stop sleeve 8, and two ends of the spring 9 are respectively abutted against the bottom surface of the punch holder 3 and the top surface of the positioning spacer 7.
The inside of the mould jacket 1 is provided with a second step which prevents the first annular flange 7a from moving downwards, so that the first annular flange 7a can only slide vertically between the second step and the stop sleeve 8;
when the hydraulic equipment drives the die to integrally move downwards, before the bottom surface of the sleeve 6 contacts the top surface of the bolt head, the bottom surface of the positioning spacer 7 firstly abuts against the top surface of the flange at the edge of the bolt head, and then the bottom surface of the sleeve 6 contacts the top surface of the bolt head;
in the process that the whole die moves downwards, the positioning spacer 7 slides upwards in the die outer sleeve 1 until the top surface of the positioning spacer 7 abuts against the bottom surface of the stop sleeve 8, the stop sleeve 8 is in a compressed state at the moment, the gap distance between the positioning spacer 7 and the stop sleeve 8 is the stroke of the positioning spacer 7, and the stroke of the positioning spacer 7 is the depth of a bolt head drawing hole;
the positioning spacer 7 of the punching rod 5 is always abutted against the top surface of the flange at the edge of the bolt head under the action of the resilience force of the spring 9 in the process of hole-drawing of the bolt head, so that the bolt head cannot lift along with the punching rod 5 in the process of hole-drawing.
The punching rod fixing piece 3 comprises a second cushion block 3a and a third cushion block 3b, the second cushion block 3a and the third cushion block 3b are fixedly mounted at the top end of the interior of the die sleeve 1, the second cushion block 3a is arranged above the third cushion block 3b, the bottom surface of the second cushion block 3a is abutted against the top surface of the third cushion block 3b, the punching rod 5 is mounted inside the third cushion block 3b in an embedded mode, the top of the punching rod 5 is provided with a second annular flange 5a extending outwards in the radial direction, the third cushion block 3b is provided with a countersunk through hole 3b1 in transition fit with the outer circumferential surface of the punching rod 5 and the second annular flange 5a, and the top surface of the punching rod 5 is abutted against the bottom surface of the second cushion block 3 a.
The punch 5 is limited at the axis of the third cushion block 3b by the countersunk through hole 3b1, so that the punch 5 cannot move along the radial direction of the punch, two end faces of the second annular flange 5a abut against the inner wall of the countersunk through hole 3b1 and the bottom face of the second cushion block 3a respectively, so that the second annular flange 5a is communicated with the punch 5 and cannot move along the axial direction of the punch, and the combined design of the second cushion block 3a and the third cushion block 3b enables the punch fixing piece 3 and the punch 5 to be easily combined and disassembled.
The sleeve ejector piece 4 comprises a first cushion block 4a and a plurality of ejector pins 4b, the first cushion block 4a is arranged in the locking nut 2 in a lifting mode, a third annular flange 6a extending outwards in the radial direction is arranged at the top end of the sleeve 6, two ends of each ejector pin 4b abut against the bottom surface of the first cushion block 4a and the top surface of the third annular flange 6a respectively, through holes for the ejector pins 4b to penetrate through are formed in the second cushion block 3a and the third cushion block 3b, and the ejector pins 4b are uniformly distributed around the axis of the sleeve 6.
The first cushion block 4a is used for bearing impact force between the ejector pin and hydraulic equipment, the ejector pin 4b is used for abutting against the sleeve 6 downwards to enable the sleeve to move vertically downwards relative to the punch rod 5, so that the bolt head is extruded out of the working end of the punch rod 5, the punch rod 5 is separated from the bolt head, and the third annular flange 6a is used for bearing the impact force of the ejector pin 4 b.
The tip of the lock nut 2 is provided with a fourth annular flange 2a extending radially outward.
The fourth annular flange 2a facilitates the worker to rotate the lock nut 2 to move it inside the die case 1 by screwing, thereby adjusting the height position of the lock nut 2 at the top end of the die case 1.
The distance between the bottom surface of the fourth annular flange 2a and the bottom surface of the lock nut 2 is smaller than the axial length of the inner circumferential surface thread of the die case 1.
The distance between the bottom surface of the fourth annular flange 2a and the bottom surface of the locking nut 2 is small, so that the bottom surface of the locking nut 2 cannot be separated from the thread section of the inner circumferential surface of the die outer sleeve 1, and the locking nut 2 is prevented from being locked by a sliding thread in the die outer sleeve 1.
The utility model discloses a theory of operation:
the hydraulic equipment drives the locking nut 2 to drive the die outer sleeve 1 to vertically move downwards and move towards the bolt head, the bottom surface of the positioning spacer 7 firstly abuts against the top surface of the flange at the edge of the bolt head, and then the bottom surface of the sleeve 6 contacts with the top surface of the bolt head;
in the process of overall vertical lifting of the die, the positioning spacer 7 slides upwards in the die outer sleeve 1 until the top surface of the positioning spacer 7 abuts against the bottom surface of the stop sleeve 8, the stop sleeve 8 is in a compressed state at the moment, the gap distance between the positioning spacer 7 and the stop sleeve 8 is the stroke of the positioning spacer 7, and the stroke of the positioning spacer 7 is the depth of a bolt head broaching hole;
when the hole is pulled, the top surface of the bolt head firstly abuts against the bottom surface of the sleeve 6, the sleeve 6 is jacked upwards by the bolt head, the sleeve 6 moves upwards and drives the sleeve liftout piece 4 to move upwards together so as to expose the punch rod 5, the mold continues to move downwards integrally, and the punch rod 5 abuts against the top surface of the bolt head and starts the hole pulling process;
the positioning spacer 7 is always abutted against the top surface of the flange at the edge of the bolt head under the action of the resilience force of the spring 9 in the process that the punch 5 pulls the bolt head, so that the bolt head cannot lift along with the punch 5 in the process of pulling the bolt head;
after the hole is drawn, the hydraulic equipment drives the locking nut 2 to drive the die outer sleeve 1 to vertically move upwards, when the die integrally moves upwards, the top surface of the sleeve ejection piece 4 abuts against the hydraulic equipment and stops moving, the die continues to integrally move upwards, the punching rod 5 moves upwards along with the punching rod fixing piece 3, and the sleeve 6 stops moving under the action of the sleeve ejection piece 4 so as to eject the bolt head from the punching rod 5, so that the bolt head is separated from the punching rod 5.
Claims (6)
1. A bolt head broaching cold heading forming die is characterized by comprising a die outer sleeve (1), a locking nut (2), a punch rod fixing piece (3), a sleeve pipe ejecting piece (4), a punch rod (5) and a sleeve pipe (6);
the mold jacket (1) and the locking nut (2) are both in a cylindrical shape, the locking nut (2) is coaxially arranged at the top end of the mold jacket (1), and the outer circumferential surface of the locking nut (2) is in threaded connection with the inner circumferential surface of the mold jacket (1);
the punching rod fixing piece (3) is fixedly arranged at the top end of the interior of the die outer sleeve (1), the top surface of the punching rod fixing piece (3) is abutted against the bottom surface of the locking nut (2), the punching rod (5) is coaxially arranged in the die outer sleeve (1), and the non-working end of the punching rod (5) is fixedly connected with the punching rod fixing piece (3);
the sleeve ejecting piece (4) can be vertically installed inside the locking nut (2) in a lifting mode, the working end of the sleeve ejecting piece (4) penetrates through the punch fixing piece (3) and abuts against the top surface of the sleeve (6), and the sleeve (6) is sleeved on the outer side of the punch (5);
in the working state, the working end of the punching rod (5) is positioned outside the sleeve (6), and in the non-working state, the working end of the punching rod (5) is positioned inside the sleeve (6).
2. The bolt head broaching and cold heading forming die according to claim 1, further comprising a positioning spacer bush (7), a stop sleeve (8) and a spring (9), wherein a first annular flange (7 a) extending radially outwards is arranged at the top end of the positioning spacer bush (7);
the first annular flange (7 a) can be vertically and slidably arranged at the bottom end of the interior of the die outer sleeve (1), and the positioning spacer bush (7) is sleeved on the outer side of the sleeve (6);
the stopping sleeve (8) is fixedly arranged at the middle end in the die outer sleeve (1), the stopping sleeve (8) is positioned between the punching rod fixing piece (3) and the positioning spacer bush (7), the top surface of the stopping sleeve (8) is abutted against the bottom surface of the punching rod fixing piece (3), and a gap is reserved between the bottom surface of the stopping sleeve (8) and the top surface of the positioning spacer bush (7);
the spring (9) is arranged in the stop sleeve (8), and two ends of the spring (9) are respectively abutted against the bottom surface of the punch rod fixing piece (3) and the top surface of the positioning spacer sleeve (7).
3. The bolt head broaching and cold heading forming die according to claim 1, wherein the punch rod fixing member (3) comprises a second cushion block (3 a) and a third cushion block (3 b), the second cushion block (3 a) and the third cushion block (3 b) are fixedly arranged at the top end of the interior of the die outer sleeve (1), the second cushion block (3 a) is arranged above the third cushion block (3 b), the bottom surface of the second cushion block (3 a) is abutted with the top surface of the third cushion block (3 b), the punch rod (5) is embedded in the third cushion block (3 b), the top of the punch rod (5) is provided with a second annular flange (5 a) extending outwards in the radial direction, the third cushion block (3 b) is provided with a countersunk through hole (3 b 1) in transition fit with the outer circumferential surface of the punch rod (5) and the second annular flange (5 a), and the top surface of the punch rod (5) is abutted with the bottom surface of the second cushion block (3 a).
4. The bolt head broaching hole cold heading forming die according to claim 3, wherein the sleeve ejector (4) comprises a first cushion block (4 a) and a plurality of ejector pins (4 b), the first cushion block (4 a) is arranged in the locking nut (2) in a liftable manner, a third annular flange (6 a) extending radially outwards is arranged at the top end of the sleeve (6), two ends of each ejector pin (4 b) are respectively abutted against the bottom surface of the first cushion block (4 a) and the top surface of the third annular flange (6 a), through holes for the ejector pins (4 b) to pass through are formed in the second cushion block (3 a) and the third cushion block (3 b), and the ejector pins (4 b) are uniformly distributed around the axis of the sleeve (6).
5. A bolt head broaching cold-heading forming die according to claim 1, wherein the top end of the lock nut (2) is provided with a fourth annular flange (2 a) extending radially outward.
6. A bolt head broaching cold-heading forming die according to claim 5, wherein the distance between the bottom surface of the fourth annular flange (2 a) and the bottom surface of the lock nut (2) is smaller than the axial length of the inner circumferential surface thread of the die outer sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421108.2U CN210547765U (en) | 2019-08-29 | 2019-08-29 | Bolt head broaching cold heading forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921421108.2U CN210547765U (en) | 2019-08-29 | 2019-08-29 | Bolt head broaching cold heading forming die |
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| Publication Number | Publication Date |
|---|---|
| CN210547765U true CN210547765U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921421108.2U Active CN210547765U (en) | 2019-08-29 | 2019-08-29 | Bolt head broaching cold heading forming die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118361A (en) * | 2021-04-08 | 2021-07-16 | 浙江华远汽车科技股份有限公司 | Broaching and stripping die |
| CN115156462A (en) * | 2022-09-05 | 2022-10-11 | 常州市武进大众标准件有限公司 | Cold heading die for automobile bolt and bolt manufacturing method thereof |
-
2019
- 2019-08-29 CN CN201921421108.2U patent/CN210547765U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118361A (en) * | 2021-04-08 | 2021-07-16 | 浙江华远汽车科技股份有限公司 | Broaching and stripping die |
| CN115156462A (en) * | 2022-09-05 | 2022-10-11 | 常州市武进大众标准件有限公司 | Cold heading die for automobile bolt and bolt manufacturing method thereof |
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