Core-pulling device for edge rolling in mold

Abstract

The utility model discloses an in-mold edge rolling core-pulling device and belongs to the technical field of molds. A base is included; the core rod driving block resetting mechanism is arranged on the upward side of the left end of the base; a mandrel driving block, a driving block reset guide rod sliding seat and a driving block sliding guide rod fixing seat; a core rod driving block rightward movement acting mechanism; a core rod guide sliding block is fixed at the right end of the core rod, and the right end of the core rod sequentially penetrates through the core rod up-and-down movement guide hole and the upper parts of the pair of core rod movement guide blocks and forms a sliding pair sliding left and right with the upper parts of the pair of core rod movement guide blocks; the lower parts of the core rod moving guide blocks are matched with the moving guide block up-down floating compensation device; and the roller pressure releasing frame is connected with the inner edge rolling punch forming machine through a linkage piece and forms linkage with the inner edge rolling punch forming machine. The device has the advantages that work is achieved by means of power of the inner edge rolling punch forming machine; the requirement for edge rolling and core pulling of one end of a lengthy workpiece can be met; the dynamic compensation springback is met; and the rolling precision is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mould technical field, concretely relates to a mould inner volute core-pulling device. BACKGROUND

[0002] The mould inner volute core-pulling device can be applied to manufacturing scenes such as automobile parts, electronic devices, military products, etc. For automobile parts, typical examples include the wrench (also known as "operating wrench") in the structural system of automobile seat slide rails, safety belt retractor shaft, exhaust system clamp, brake oil pipe fixing ring, etc. For electronic devices, a typical example is the TYpe-C interface metal shell volute forming. For military products, typical examples include the core-pulling and demolding of spacecraft pipeline connectors and shell closing processes.

[0003] For the wrench in the structural system of the automobile seat slide rails, please refer to the "automobile seat slide rail unlocking mechanism" recommended in CN106864313A. In this patent, the right end of the wrench is riveted to the left end of the unlocking handle. Specifically, a pair of pin holes are provided in the right end of the wrench, and a connecting piece is extended from the left end of the unlocking handle. A pair of connecting holes are provided in the connecting piece. The unlocking handle and the wrench are riveted by rivets at positions corresponding to the connecting holes and the pin holes. Since the wrench and the unlocking handle (the body is a tubular body) are not in a plug-in connection relationship with each other, the structure is complex, the processing technology is numerous, and the processing efficiency is relatively low. In particular, the connection reliability, concentricity, axial gap, etc. between the two cannot meet the desired requirements. Therefore, if the right end of the wrench and the left end of the unlocking handle in this patent form a plug-in (i.e. plug-in) relationship, as long as the right end of the wrench is rolled, and the left end of the unlocking handle is abandoned, the rolling and the left end of the unlocking handle can be directly plugged in to compensate for the above shortcomings, and the concentricity, axial gap, etc. between the two can also be improved.

[0004] The applicant needs to point out that the above-mentioned rolling of the end of the wrench towards the unlocking handle is only an example and does not mean a special limitation on the manufacturing scene.

[0005] According to professional knowledge, the core-pulling (also known as "core rod") can play the roles of precise control, auxiliary demolding, and wrinkle and crack prevention during the rolling stamping process. More specifically, the core-pulling supports the inner wall of the pipe during the stamping process by the stamping device such as a punch press with the help of a die (upper die and lower die facing each other) to prevent material shrinkage or expansion and ensure the stability of the inner diameter size. In addition, after the circle forming, the workpiece and the die, especially the upper die, are tightly attached due to elastic deformation, which causes demolding difficulty. Therefore, the core rod is withdrawn from the circle formed by the core-pulling device to assist in demolding and avoid deformation caused by strong pulling.

[0006] Since the roll core-pulling device belongs to the non-standard equipment category due to the exclusive characteristics of a certain workpiece or product, there is no generalization, and only the manufacturer of a certain product can design and manufacture it by itself. And in the process of self-design, it also needs to fully consider the factors of no interference during workpiece processing, simple structure, easy operation, low manufacturing cost and so on. This can also be verified by Chinese patents CN105251967A (core-pulling mechanism for die casting machine) and CN221089831U (core-pulling structure with extrusion function). Content of the utility model

[0007] The task of the utility model is to provide a mold inner roll core-pulling device which is helpful to set up with the inner roll core-pulling machine and work by the power of the inner roll core-pulling machine, so as to abandon the self-provided control device such as complex cylinder or oil cylinder, is helpful to increase the reciprocating stroke of core-pulling, can meet the roll core-pulling requirement of one end of long workpiece, can make the core rod realize free displacement up and down, can meet the dynamic compensation rebound and guarantee the roll core-pulling precision, and is beneficial to embody the simplicity of structure, can reduce the manufacturing cost and is easy to operate.

[0008] The utility model discloses a kind of mould inner roundness core-pulling devices, including a base, the base is set on support in floor with one side of inner roundness punch forming machine in use state;A core rod driving block reset mechanism, the core rod driving block reset mechanism is set on the left end of the base towards one side of upper;A core rod driving block, a driving block reset guide rod sliding seat and a driving block sliding guide rod fixed seat, core rod driving block is located between driving block reset guide rod sliding seat and driving block sliding guide rod fixed seat, and the core rod driving block and the pair of core rod driving block sliding guide rod that each other front and rear parallel constitute left and right sliding sliding pair, the left end of the pair of core rod driving block sliding guide rod is fixed with the driving block reset guide rod sliding seat, and right end is fixed with driving block sliding guide rod fixed seat, and there is a core rod guide sliding block upper and lower sliding guide groove from the upper portion of core rod driving block to lower portion in the right side of core rod driving block and in the position between the pair of core rod driving block sliding guide rod, driving block reset guide rod sliding seat and driving block sliding guide rod fixed seat are fixed with the base in respectively corresponding to the left side and right side of core rod driving block, a core rod upper and lower movement guide hole is set in from left side of driving block sliding guide rod fixed seat to right side on driving block sliding guide rod fixed seat and in the position corresponding to the core rod guide sliding block upper and lower sliding guide groove, the core rod driving block reset mechanism is fixedly connected with the driving block reset guide rod sliding seat and the core rod driving block by the driving block reset guide rod sliding seat;A core rod driving block right movement mechanism, the core rod driving block right movement mechanism is set on the base in the position of the left side of the driving block reset guide rod sliding seat and simultaneously connect with the front lower portion and rear lower portion of the core rod driving block;A core rod and a pair of core rod movement guide block, a core rod guide sliding block is fixed in the right end of core rod, and the core rod guide sliding block and the core rod guide sliding block upper and lower sliding guide groove constitute sliding pair, the right end of core rod passes through core rod upper and lower movement guide hole and the upper portion of the pair of core rod movement guide block in sequence and forms left and right sliding sliding pair with the upper portion of the pair of core rod movement guide block, and the lower portion of the pair of core rod movement guide block is matched with the movement guide block upper and lower floating compensation device set on the workbench of inner roundness punch forming machine in use state;A roller pressure release frame, the roller pressure release frame is connected with the inner roundness punch forming machine through linkage and forms linkage with inner roundness punch forming machine in use state, and the core rod driving block right movement mechanism is pressed or released by the roller pressure release frame.

[0009] In one specific embodiment of the utility model, a swing arm hinged seat fixing cavity is opened on the base and at a position corresponding to the core rod driving block right moving mechanism, a driving block reset guide rod sliding seat fixing cavity is opened at a position corresponding to the driving block reset guide rod sliding seat, and a driving block sliding guide rod fixed seat fixing cavity is opened at a position corresponding to the driving block sliding guide rod fixed seat, the core rod driving block right moving mechanism is arranged on the base at a position corresponding to the swing arm hinged seat fixing cavity and is fixed with the base by swing arm hinged seat fixing screws screwed into the swing arm hinged seat fixing cavity from the bottom of the base, the lower part of the driving block reset guide rod sliding seat is inserted into the driving block reset guide rod sliding seat fixing cavity and is fixed with the base by driving block reset guide rod sliding seat fixing screws screwed into the driving block reset guide rod sliding seat fixing cavity from the bottom of the base, and the lower part of the driving block sliding guide rod fixed seat is inserted into the driving block sliding guide rod fixed seat fixing cavity and is fixed with the base by driving block sliding guide rod fixed seat fixing screws screwed into the driving block sliding guide rod fixed seat fixing cavity from the bottom of the base.

[0010] In another specific embodiment of the utility model, a guide rod supporting plate fixing cavity is opened on the left end of the base in a state parallel to the short side direction of the base, a front wall plate fixing cavity parallel to the long side direction of the base is opened at a position corresponding to the right side of the front end of the guide rod supporting plate fixing cavity, and a rear wall plate fixing cavity also parallel to the long side direction of the base is opened at a position corresponding to the right side of the rear end of the guide rod supporting plate fixing cavity, and the front and rear wall plate fixing cavities are parallel to each other front and rear.

[0011] In still another specific embodiment of the utility model, a pair of core rod driving block reset guide rod sliding sleeve holes are set up on the driving block reset guide rod sliding seat and at the upper part of the driving block reset guide rod sliding seat, a core rod driving block reset guide rod sliding sleeve is arranged in the core rod driving block reset guide rod sliding sleeve hole, a pair of core rod driving block reset guide rod fixing holes are set up on the core rod driving block and at the position corresponding to the core rod driving block reset guide rod sliding sleeve hole.

[0012] In still another specific embodiment of the utility model, a pair of core rod driving block sliding guide rod guide sleeves are arranged on the core rod driving block and at the position corresponding to the pair of core rod driving block sliding guide rods, and the pair of core rod driving block sliding guide rods are in sliding fit with the pair of core rod driving block sliding guide rod guide sleeves.

[0013] In still another embodiment of the utility model, the front end face and the rear end face of the mandrel driving block are each provided with a hinge pad matching cavity, and a hinge pad hinge pin hole is formed in the hinge pad matching cavity; the right movement mechanism of the mandrel driving block comprises a swing arm hinge seat, a front left swing arm, a rear left swing arm, a front right swing arm, a rear right swing arm, a front hinge pad, a rear hinge pad, a swing arm shaft, a front roller and a rear roller; the swing arm hinge seat is inserted into the swing arm hinge seat fixed cavity and fixed to the base by swing arm hinge seat fixed screws screwed into the swing arm hinge seat fixed cavity from the bottom of the base; the front end and the rear end of the swing arm hinge seat are each provided with an upwardly folded left swing arm hinge ear, a left swing arm hinge ear pin hole is formed in the left swing arm hinge ear; the front left swing arm is located behind the front right swing arm, and the upper ends of the front left swing arm and the front right swing arm are coaxially hinged to the front end of the swing arm shaft; the lower end of the front left swing arm is hinged to the left swing arm hinge ear formed on the front end of the swing arm hinge seat through a front left swing arm pin at a position corresponding to the left swing arm hinge ear pin hole; the lower end of the front right swing arm is hinged to the front wall of the front hinge pad through a front right swing arm pin at a position corresponding to a front right swing arm pin hole formed in the front wall of the front hinge pad, and the front right swing arm pin is also screwed into the hinge pad hinge pin hole; the rear left swing arm is located in front of the rear right swing arm, and the upper ends of the rear left swing arm and the rear right swing arm are coaxially hinged to the rear end of the swing arm shaft; the lower end of the rear left swing arm is hinged to the left swing arm hinge ear formed on the rear end of the swing arm hinge seat through a rear left swing arm pin at a position corresponding to the left swing arm hinge ear pin hole of the rear end of the swing arm hinge seat; the lower end of the rear right swing arm is hinged to the rear wall of the rear hinge pad through a rear right swing arm pin at a position corresponding to a rear right swing arm pin hole formed in the rear wall of the rear hinge pad, and the rear right swing arm pin is also screwed into the hinge pad hinge pin hole; the front hinge pad is matched with the hinge pad matching cavity corresponding to the lower part of the front end face of the mandrel driving block through a front hinge pad cavity formed in the rear side of the middle part of the front hinge pad, and the left and right cavity walls of the front hinge pad cavity of the front hinge pad abut against the left and right side faces of the mandrel driving block; the rear hinge pad is matched with the hinge pad matching cavity corresponding to the lower part of the rear end face of the mandrel driving block through a rear hinge pad cavity formed in the front side of the middle part of the rear hinge pad, and the left and right cavity walls of the rear hinge pad cavity of the rear hinge pad abut against the left and right side faces of the mandrel driving block; the front roller is arranged at the front end of the swing arm shaft at a position in front of the upper end of the front right swing arm, and the rear roller is arranged at the rear end of the swing arm shaft at a position behind the upper end of the rear right swing arm; a shaft sleeve is sleeved between the upper ends of the front left swing arm and the rear left swing arm and the middle part of the swing arm shaft; the front end lower part of the roller pressure releasing frame corresponds to the front roller, and the rear end lower part corresponds to the rear roller.

[0014] In a further specific embodiment of the utility model, a front longitudinal arm is formed at the front end of the roller pressing release frame, the lower end of the front side arm corresponds to the front roller, a rear longitudinal arm is formed at the rear end of the roller pressing release frame, and the lower end of the rear longitudinal arm corresponds to the rear roller.

[0015] In a further specific embodiment of the utility model, a front longitudinal arm is formed at the front end of the roller pressing release frame, the lower end of the front side arm corresponds to the front roller, a rear longitudinal arm is formed at the rear end of the roller pressing release frame, and the lower end of the rear longitudinal arm corresponds to the rear roller.

[0016] In a further specific embodiment of the utility model, the front left swing arm and the front right swing arm form a herringbone relationship with each other, and the rear left swing arm and the rear right swing arm form a herringbone relationship with each other.

[0017] In a further specific embodiment of the utility model, the mobile guide block up-and-down floating compensation device comprises a core rod mobile guide block floating seat, a core rod mobile guide block first supporting spring and a core rod mobile guide block second supporting spring, the core rod mobile guide block floating seat is arranged on the working platform of the inner roll forming press, a first supporting spring cavity and a second supporting spring cavity are arranged on the core rod mobile guide block floating seat, the core rod mobile guide block first supporting spring is arranged in the first supporting spring cavity, and the core rod mobile guide block second supporting spring is arranged in the second supporting spring cavity, one of the pair of core rod mobile guide blocks on the left is arranged in the first supporting spring cavity in an up-and-down floating manner and contacts the upper end of the core rod mobile guide block first supporting spring at the bottom, and one of the pair of core rod mobile guide blocks on the right is arranged in the second supporting spring cavity in an up-and-down floating manner and contacts the upper end of the core rod mobile guide block second supporting spring at the bottom.

[0018] The technical effect of the technical scheme provided by the utility model lies in that: the base and the components arranged with the base as the carrier are arranged on the support supported on the terrace on one side of the inner roll forming press, and the roller pressure release frame is connected with the inner roll forming press through the linkage in the use state and forms linkage with the inner roll forming press, so that the work can be realized by the power of the inner roll forming press, and it is not necessary to additionally arrange the control device such as the complex cylinder or oil cylinder for enabling the roller pressure release frame to work; the left end of the core rod is connected with the core rod driving block through the core rod guide sliding block, the core rod driving block can be reset to the left by the core rod driving block reset mechanism, and the core rod driving block is moved to the right together with the core rod by the core rod driving block right movement acting mechanism of the roller pressure release frame, so that the left and right reciprocating stroke of the core rod is large, and the core rod can meet the requirements of the core drawing of the one end of the long workpiece; a pair of core rod movement guide blocks are arranged at the right end of the core rod, and the pair of core rod movement guide blocks are arranged on the up and down floating compensation device arranged on the movement guide block with the workbench of the roll forming press as the carrier, so that the core rod can realize the four-degree-of-freedom displacement of the left and right displacement and the up and down free displacement, meet the dynamic compensation rebound and guarantee the roll accuracy; the overall structure is relatively simple, so that the manufacturing cost is reduced and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the embodiment structure diagram of the utility model;

[0020] Figure 2 It is Figure 1 The core rod driving block is shown in the schematic view of the sliding of the pair of core rod driving block sliding guide rods between the driving block reset guide rod sliding seat and the driving block sliding guide rod fixed seat;

[0021] Figure 3 It is the application example schematic view of the utility model;

[0022] Figure 4 It is the schematic view of the roll forming of the one end of the workpiece by the inner roll forming press through the die. DETAILED DESCRIPTION

[0023] In order to enable the technical essence and beneficial effects of the utility model to be understood more clearly, the embodiment will be described in detail below, but the description of the embodiment is not the limitation of the utility model scheme, and any equivalent transformation only in form but not in essence according to the utility model concept should be regarded as the technical scheme category of the utility model.

[0024] In the following description, the directional or positional concepts of up, down, left, right, front and back are all based on the current by Figure 1The location and state are taken as a reference, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0025] Please see Figure 1 The image shows a base 1, which, in its operational state, is mounted on a support on the floor along with one side of the inward rolling stamping machine, as shown on the left side. Figure 1 As shown, the base 1 is a rectangular plate, preferably made of metal; a mandrel drive block reset mechanism 2 is shown, which is located on the upward-facing left side of the aforementioned base 1; a mandrel drive block 3, a drive block reset guide rod sliding seat 4, and a drive block sliding guide rod fixing seat 5 are shown. The mandrel drive block 3 is located between the drive block reset guide rod sliding seat 4 and the drive block sliding guide rod fixing seat 5, and the mandrel drive block 3 and a pair of mandrel drive block sliding guide rods 31 parallel to each other form a sliding pair that slides left and right. The left end of the mandrel drive block sliding guide rod 31 is fixed to the aforementioned drive block reset guide rod sliding seat 4, while the right end is fixed to the drive block sliding guide rod fixing seat 5. A mandrel guide slider sliding guide groove 32 is formed on the right side of the mandrel drive block 3, corresponding to the position between a pair of mandrel drive block sliding guide rods 31, extending from the upper part to the lower part of the mandrel drive block 3. The drive block reset guide rod sliding seat 4 and the drive block sliding guide rod fixing seat 5 are fixed to the aforementioned base 1 at positions corresponding to the left and right sides of the mandrel drive block 3, respectively. Furthermore, a mandrel vertical movement guide hole 51 is provided at the position corresponding to the aforementioned mandrel guide slider sliding guide groove 32, extending from the left side to the right side of the self-driving block sliding guide rod fixing seat 5. The aforementioned mandrel driving block reset mechanism 2 is fixedly connected to the aforementioned mandrel driving block 3 in a sliding state via the aforementioned driving block reset guide rod sliding seat 4. A mandrel driving block rightward movement mechanism 6 is shown. This mandrel driving block rightward movement mechanism 6 is provided on the aforementioned base 1 at the position located to the left of the aforementioned driving block reset guide rod sliding seat 4 and simultaneously connected to the front side of the aforementioned mandrel driving block 3. The lower part and rear side are connected; a mandrel 7 and a pair of mandrel moving guide blocks 8 are shown. A mandrel guide block 71 is fixed at the right end of the mandrel 7. The mandrel guide block 71 and the aforementioned mandrel guide block upper and lower sliding guide groove 32 form an upper and lower sliding pair. The right end of the mandrel 7 passes through the mandrel upper and lower moving guide hole 51 and the upper part of the pair of mandrel moving guide blocks 8 in sequence and forms a left and right sliding pair with the upper part of the pair of mandrel moving guide blocks 8. The lower part of the pair of mandrel moving guide blocks 8 is connected to the working platform 10 of the inward rolling stamping machine in the use state. Figure 3The moving guide block on the diagram cooperates with the floating compensation device 101; a roller pressure release frame 9 is shown, which is connected to the aforementioned inward rolling stamping machine through the linkage 40 and forms a linkage with the inward rolling stamping machine in the use state. The roller pressure release frame 9 applies pressure or releases pressure on the aforementioned mandrel drive block rightward movement mechanism 6.

[0026] Depend on Figure 2 As shown, a pair of right fixing holes 52 for the mandrel driving block sliding guide rod are provided on the driving block sliding guide rod fixing seat 5, and a pair of left fixing holes 43 for the mandrel driving block sliding guide rod are provided on the driving block reset guide rod sliding seat 4. The left end of the pair of mandrel driving block sliding guide rods 31 is fixed to the driving block reset guide rod sliding seat 4 at the position corresponding to the position of the pair of mandrel driving block sliding guide rod left fixing holes 43, and the right end is fixed to the driving block sliding guide rod fixing seat 5 at the position corresponding to the position of the pair of mandrel driving block sliding guide rod right fixing holes 52.

[0027] exist Figure 1 The diagram shows a base fixing screw 15 for securing the base 1 to a bracket or similar carrier supported on the ground. The aforementioned linkage 40 can be a press crank, a connecting rod, or a lever arm, etc., as long as it meets the requirement of borrowing power from the inward rolling press. The screw 93 shown on the roller pressure release frame 9 is used for fixed connection with the aforementioned linkage 40. That is, the linkage 40 is located between the up-and-down moving parts of the inward rolling press and the roller pressure release frame 9, so that when the inward rolling press performs up-and-down pressing action, the linkage 40 drives the roller pressure release frame 9 to move accordingly.

[0028] See you later Figure 1 A swing arm hinge seat fixing cavity 11 is formed on the aforementioned base 1 at a position corresponding to the aforementioned mandrel drive block rightward movement mechanism 6. A drive block reset guide rod sliding seat fixing cavity 12 is formed at a position corresponding to the aforementioned drive block reset guide rod sliding seat 4, and a drive block sliding guide rod fixing cavity 13 is formed at a position corresponding to the drive block sliding guide rod fixing seat 5. The aforementioned mandrel drive block rightward movement mechanism 6 is disposed on the base 1 at a position corresponding to the aforementioned swing arm hinge seat fixing cavity 11 and is screwed into the swing arm hinge seat fixing cavity 11 from the bottom of the base 1. The inner swing arm hinge seat fixing screw is fixed to the base 1. The lower part of the aforementioned drive block reset guide rod sliding seat 4 is inserted into the drive block reset guide rod sliding seat fixing cavity 12 and the drive block reset guide rod sliding seat fixing screw, which is screwed into the drive block reset guide rod sliding seat fixing cavity 12 from the bottom of the base 1, is fixed to the base 1. The lower part of the aforementioned drive block sliding guide rod fixing seat 5 is inserted into the drive block sliding guide rod fixing cavity 13 and the drive block sliding guide rod fixing screw, which is screwed into the drive block sliding guide rod fixing cavity 13 from the bottom of the base 1, is fixed to the base 1.

[0029] A guide rod support plate fixing cavity 14a is formed in the left end of the aforementioned base 1 in a direction parallel to the short side of the base 1, a front wall plate fixing cavity 14b parallel to the long side of the base 1 is formed at a position corresponding to the right side of the front end of the guide rod support plate fixing cavity 14a, and a rear wall plate fixing cavity 14c also parallel to the long side of the base 1 is formed at a position corresponding to the right side of the rear end of the guide rod support plate fixing cavity 14a, the front and rear wall plate fixing cavities 14b, 14c being parallel to each other; the aforementioned core rod driving block reset mechanism 2 is arranged on the left end of the aforementioned base 1 toward the upper side at positions corresponding to the aforementioned guide rod support plate fixing cavity 14a, the front wall plate fixing cavity 14b, and the rear wall plate fixing cavity 14c.

[0030] The aforementioned short side direction of the base 1 refers to the distance from the front side to the rear side of the base 1, i.e., the width of the base 1; the aforementioned long side direction of the base 1 refers to the distance from the left side to the right side of the base 1, i.e., the length of the base 1.

[0031] Please refer to Figure 2 and in combination with Figure 1 A pair of core rod driving block reset guide rod sliding sleeve holes 41 (41a, 41b) parallel to each other are formed on the aforementioned driving block reset guide rod sliding seat 4 and at the upper part of the driving block reset guide rod sliding seat 4, the core rod driving block reset guide rod sliding sleeve holes 41 (41a, 41b) being arranged in a direction parallel to the long side of the base 1. Figure 2(As shown), a mandrel drive block reset guide rod sliding sleeve 411 is provided in the mandrel drive block reset guide rod sliding sleeve hole 41. A pair of mandrel drive block reset guide rod fixing holes 33 are provided on the aforementioned mandrel drive block 3 at positions corresponding to the mandrel drive block reset guide rod sliding sleeve hole 41. The aforementioned mandrel drive block reset mechanism 2 includes a guide rod support plate 21, a front wall plate 22, a rear wall plate 23, a pair of mandrel drive block reset guide rods 24, and a pair of guide rod reset springs 25. The lower part of the guide rod support plate 21 is inserted into the aforementioned guide rod support plate fixing cavity 14a and is controlled from the bottom. The bottom of the base 1 is screwed into the guide rod support plate fixing cavity 14a and fixed to the base 1 by the guide rod support plate fixing screw. A pair of guide rod sliding sleeve holes are opened on the upper part of the guide rod support plate 21 in a front-to-back correspondence. A pair of guide rod sliding sleeves 211 are provided in the pair of guide rod sliding sleeve holes. The front wall plate 22 and the rear wall plate 23 are aligned front-to-back with each other and their lower parts are respectively inserted into the aforementioned front and rear wall plate fixing cavities 14b and 14c and fixed by the front and rear wall plate fixing screws screwed into the front and rear wall plate fixing cavities 14b and 14c respectively from the bottom of the base 1. A pair of core rod drive blocks are combined. The guide rods 24 translate back and forth relative to each other. The left end of the pair of mandrel drive block reset guide rods 24 slides with the aforementioned pair of guide rod sleeves 211, while the right end of the pair of mandrel drive block reset guide rods 24, after passing through the aforementioned mandrel drive block reset guide rod sleeves 411, is fixed to the aforementioned mandrel drive block 3 at a position corresponding to the aforementioned pair of mandrel drive block reset guide rod fixing holes 33. A guide rod reset spring support step ring 241 is formed at the left end of each pair of mandrel drive block reset guide rods 24 and at a position located on the right side of the aforementioned guide rod support plate 21. The rod return springs 25 are respectively sleeved on a pair of core rod drive block return guide rods 24, and the left ends of the pair of guide rod return springs 25 are each supported on the right side of the aforementioned guide rod return spring support step ring 241, while the right ends of the pair of guide rod return springs 25 are supported on the left side of the aforementioned drive block return guide rod sliding seat 4. The front left side of the aforementioned roller pressure release frame 9 is in contact with the front wall panel abutting surface 221 on the upper right side of the front wall panel 22, and the rear left side of the roller pressure release frame 9 is in contact with the rear wall panel abutting surface 231 on the upper right side of the rear wall panel 23.

[0032] Depend on Figure 2 As shown, as a preferred embodiment, a hinged pad left-side insertion cavity 42 is formed on the right front and rear of the aforementioned drive block reset guide rod sliding seat 4. Due to the setting of the hinged pad left-side insertion cavity 42, interference with the left side walls of the front and rear hinged pads 66 and 67 of the structural system of the mandrel drive block right-moving action mechanism 6 mentioned below can be avoided.

[0033] See you later Figure 1 and Figure 2A pair of core rod driving block sliding guide rod guide sleeves 34 are arranged on the aforementioned core rod driving block 3 and at positions corresponding to the aforementioned pair of core rod driving block sliding guide rods 31, and the pair of core rod driving block sliding guide rods 31 are in sliding fit with the pair of core rod driving block sliding guide rod guide sleeves 34.

[0034] As shown in Figure 2 The front end face and the rear end face of the aforementioned core rod driving block 3 are each formed with a hinge pad fit cavity 35 at the lower part, and a hinge pad hinge pin hole 351 is formed in the hinge pad fit cavity 35.

[0035] As still shown in Figure 1 And as shown in Figure 2, the aforementioned core rod driving block right moving mechanism 6 comprises a swing arm hinged seat 61, a front left swing arm 62, a rear left swing arm 63, a front right swing arm 64, a rear right swing arm 65, a front hinged pad 66, a rear hinged pad 67, a swing arm shaft 68, a front roller 69a and a rear roller 69b, the swing arm hinged seat 61 is inserted into the aforementioned swing arm hinged seat fixed cavity 11 and is fixed with the base 1 by swing arm hinged seat fixed screws screwed into the swing arm hinged seat fixed cavity 11 from the bottom of the aforementioned base 1, left swing arm hinged ears 611 are formed at the front end and the rear end of the swing arm hinged seat 61 respectively, an upwardly folded left swing arm hinged ear pin hole 6111 is formed in the left swing arm hinged ear 611, the front left swing arm 62 is located behind the front right swing arm 64, the upper ends of the front left swing arm 62 and the front right swing arm 64 are coaxially hinged at the front end of the swing arm shaft 68, the lower end of the front left swing arm 62 is hinged with the aforementioned left swing arm hinged ear 611 formed at the front end of the aforementioned swing arm hinged seat 61 at a position corresponding to the aforementioned left swing arm hinged ear pin hole 6111 through a front left swing arm pin 621, the lower end of the front right swing arm 64 is hinged with the front wall of the aforementioned front hinged pad 66 at a position corresponding to a front right swing arm pin hole 662 formed in the front wall of the aforementioned front hinged pad 66 through a front right swing arm pin 641, the front right swing arm pin 641 is also screwed into the aforementioned hinged pad hinged pin screw hole 351, the rear left swing arm 63 is located in front of the rear right swing arm 65, the upper ends of the rear left swing arm 63 and the rear right swing arm 65 are coaxially hinged at the rear end of the swing arm shaft 68, the lower end of the rear left swing arm 63 is hinged with the aforementioned left swing arm hinged ear 611 formed at the rear end of the aforementioned swing arm hinged seat 61 at a position corresponding to the aforementioned left swing arm hinged ear pin hole 6111 through a rear left swing arm pin, the lower end of the rear right swing arm 65 is hinged with the rear wall of the aforementioned rear hinged pad 67 at a position corresponding to a rear right swing arm pin hole 672 formed in the rear wall of the aforementioned rear hinged pad 67 through a rear right swing arm pin not shown in the figure, the rear right swing arm pin is also screwed into the aforementioned hinged pad hinged pin screw hole 351, the front hinged pad 66 is fitted with the aforementioned hinged pad fitting cavity 35 corresponding to the lower part of the front end face of the core rod driving block 3 through a front hinged pad cavity 661 formed at the rear side of the middle part of the front hinged pad 66, the left and right cavity walls of the front hinged pad cavity 661 of the front hinged pad 66 abut against the left and right side faces of the core rod driving block 3, the rear hinged pad 67 is fitted with the aforementioned hinged pad fitting cavity 35 corresponding to the lower part of the rear end face of the core rod driving block 3 through a rear hinged pad cavity 671 formed at the front side of the middle part of the rear hinged pad 67, the left and right cavity walls of the rear hinged pad cavity 671 of the rear hinged pad 67 abut against the left and right side faces of the core rod driving block 3, the front roller 69a is arranged at the front end of the aforementioned swing arm shaft 68 at a position in front of the upper end of the aforementioned front right swing arm 64, the rear roller 69b is arranged at the rear end of the aforementioned swing arm shaft 68 at a position behind the upper end of the aforementioned rear right swing arm 65,A sleeve 681 is fitted on the middle part of the swing arm shaft 68 and between the upper ends of the front left swing arm 62 and the rear left swing arm 63.

[0036] As shown in Figure 1 A front longitudinal arm 91 is formed on the front end of the roller pressing release frame 9, and the lower end of the front longitudinal arm 91 corresponds to the front roller 69a. A rear longitudinal arm 92 is formed on the rear end of the roller pressing release frame 9, and the lower end of the rear longitudinal arm 92 corresponds to the rear roller 69b.

[0037] A front longitudinal arm inclined surface 911 is formed on the lower end surface of the front longitudinal arm 91, and the front longitudinal arm inclined surface 911 corresponds to and cooperates with the front roller 69a. A rear longitudinal arm inclined surface 921 is formed on the lower end surface of the rear longitudinal arm 92, and the rear longitudinal arm inclined surface 921 corresponds to and cooperates with the rear roller 69b. The front and rear longitudinal arm inclined surfaces 911, 921 are inclined downward from right to left.

[0038] The front left swing arm 62 and the front right swing arm 64 form a herringbone relationship with each other. The rear left swing arm 63 and the rear right swing arm 65 form a herringbone relationship with each other.

[0039] During the process of driving or forcing the roller pressing release frame 9 to move downward by the linkage 40 of the inner volute punch forming machine, the front and rear longitudinal arm inclined surfaces 911, 921 act on the front and rear rollers 69a, 69b, respectively. When the front and rear rollers 69a, 69b are subjected to downward force, the swing arm shaft 68 is forced to move downward, so that the lower parts of the front left and right swing arms 62, 64 are repelled from each other, and the lower parts of the rear left and right swing arms 63, 65 are repelled from each other. The core rod driving block 3 moves to the right together with the core rod 7. Conversely, when the roller pressing release frame 9 moves upward and the front and rear longitudinal arm inclined surfaces 911, 921 release the pressure on the front and rear rollers 69a, 69b, a pair of core rod driving block reset guide rods 24 together with the core rod driving block 3 are displaced to the left under the restoring force of a pair of guide rod reset springs 25 of the core rod driving block reset mechanism 2, and the core rod 7 driven by the core rod driving block 3 is also displaced to the left accordingly, that is, the core rod exits the punch forming circle, and the core pulling is realized.

[0040] Please refer to Figure 3The aforementioned moving guide block floating compensation device 101 includes a mandrel moving guide block floating seat 1011, a mandrel moving guide block first support spring 1012, and a mandrel moving guide block second support spring 1013. The mandrel moving guide block floating seat 1011 is mounted on the working platform 10 of the aforementioned inward rolling stamping forming machine. A first support spring cavity 10111 and a second support spring cavity 10112 are spaced apart on the mandrel moving guide block floating seat 1011. The first support spring 1012 is disposed in the first support spring cavity 10111. Inside the first support spring 1013 of the mandrel moving guide block, the left mandrel moving guide block of the pair of mandrel moving guide blocks 8 is floating up and down in the first support spring cavity 10111 and its bottom is in contact with the upper end of the first support spring 1012 of the mandrel moving guide block, while the right mandrel moving guide block of the pair of mandrel moving guide blocks 8 is floating up and down in the second support spring cavity 10112 and its bottom is in contact with the upper end of the second support spring 1013 of the mandrel moving guide block.

[0041] As can be seen from the above description, the moving guide block floating compensation device 101 can make a pair of mandrel moving guide blocks 8 float up and down, thereby enabling the mandrel 7 to achieve vertical displacement by the pair of mandrel moving guide blocks 8.

[0042] The workpiece is 30 ( ) in the inward rolling stamping machine Figure 4 (As shown) During the inward rolling stamping process, the mandrel 7 plays a role in precise control, assisting in demolding, and preventing wrinkles and cracks. Furthermore, the aforementioned floating compensation device 101 ensures that the mandrel 7 does not deform during the stamping process of the inward rolling stamping machine, thus preventing any impact on the quality of the rolled circle 301. In other words, the mandrel 7 achieves four degrees of freedom of displacement: left-right and up-down, satisfying dynamic compensation for springback and ensuring rolling accuracy.

[0043] Please see Figure 4 ,exist Figure 4 The image shows a die 20 for mounting on an inward rolling die forming machine. The die 20 includes an upper die 201 and a lower die 202. The upper cavity 2011 of the upper die 201 and the lower cavity 2021 of the lower die 202 work together to form a circle 301 at one end of the workpiece 30. The workpiece 30 in this embodiment is exemplified as an automotive seat slide rail wrench, but is not limited thereto.

[0044] The applicant briefly describes the working process of the utility model, taking the upper half die 201 as an example, when the inner round stamping forming machine works, the roller pressing release frame 9 is driven by the aforementioned linkage 40 to move downward, according to the applicant's description above, the front and rear longitudinal arm inclined surfaces 911, 921 of the front and rear longitudinal arms 91, 92 press the front and rear rollers 69a, 69b, the front and rear rollers 69a, 69b act on the swing arm shaft 68, so that the front left and right swing arms 62, 64 and the rear left and right swing arms 63, 65 are stressed, and the distance between the lower ends of the front left and right swing arms 62, 64 and the distance between the lower ends of the rear left and right swing arms 63, 65 increase. Specifically, the lower ends of the front and rear left swing arms 62, 63 are hinged to the left swing arm hinge lug 611 respectively, and the lower ends of the front and rear right swing arms 64, 65 are hinged to the front and rear hinge pads 66, 67 respectively, and the front and rear hinge pads 66, 67 are connected with the core rod driving block 3, for example, the front right swing arm pin shaft 641 is connected with the hinge pad hinge pin shaft screw hole 351, so that the core rod driving block 3 moves right along the pair of core rod driving block sliding guide rods 31, the core rod 7 moves right correspondingly through the core rod guide sliding block 71 of the core rod driving block 3, and the right end of the core rod 71 is inserted into the part of the workpiece 30 to be formed into a round 301. During the movement of the aforementioned core rod driving block 3 to the right, the right end of the pair of core rod driving block reset guide rods 24 fixed with the pair of core rod driving blocks also moves right, and the pair of guide rod reset springs 25 are compressed to store energy. Under the action of the inner round stamping forming machine, the upper half die 201 moves downward, that is, moves towards the static lower half die 202 arranged on the workbench 10, until the upper and lower half dies 201, 202 are closed to form a round 301 at the right end of the workpiece 30.

[0045] Under the reverse action of the inner round stamping forming machine, the upper half die 201 moves upward, that is, the mold is opened, at this time, the roller pressing release frame 9 also moves upward under the action of the linkage 40 to release the pressure on the front and rear rollers 69a, 69b. At the same time, under the restoring force of the pair of guide rod reset springs 25, the pair of core rod driving block reset guide rods 24 move left, driving the core rod driving block 3 and the core rod 7 to move left, so that the core rod 7 exits the round 301 to complete the core pulling. Then the workpiece 30 formed with the round 301 is taken away by the attendant or the automatic mechanical hand. Then the next workpiece 30 to be formed into a round 301 is introduced into the lower half die 202 by the attendant or the automatic mechanical hand, and the aforementioned process is repeated. Through the aforementioned description of the working process of the utility model, it can be proved that the core rod 7 can meet the four degrees of freedom requirements of up and down and left and right displacement.

[0046] In summary, the technical scheme provided by the utility model makes up for the shortcomings in the prior art, successfully completes the invention task, and truly realizes the technical effects described in the technical effect column above.

Claims

1. A core-pulling device for rolling and pulling inside a mold, characterized in that: The system includes a base (1), which, in use, is mounted on a support on the floor alongside one side of the inward rolling circular stamping machine; a mandrel drive block reset mechanism (2), which is located on the left side of the base (1) facing upward; a mandrel drive block (3), a drive block reset guide rod sliding seat (4), and a drive block sliding guide rod fixing seat (5). The mandrel drive block (3) is located between the drive block reset guide rod sliding seat (4) and the drive block sliding guide rod fixing seat (5), and the mandrel drive block (3) and a pair of mandrel drive block sliding guide rods (31) that are parallel to each other front and back form a sliding pair that slides left and right. The left end of the pair of mandrel drive block sliding guide rods (31) is parallel to each other. The drive block reset guide rod sliding seat (4) is fixed, and its right end is fixed to the drive block sliding guide rod fixing seat (5). On the right side of the mandrel drive block (3) and at the position corresponding to a pair of mandrel drive block sliding guide rods (31), a mandrel guide slider sliding guide groove (32) extending from the upper part to the lower part of the mandrel drive block (3) is formed. The drive block reset guide rod sliding seat (4) and the drive block sliding guide rod fixing seat (5) are fixed to the base (1) at the positions corresponding to the left and right sides of the mandrel drive block (3), respectively. On the drive block sliding guide rod fixing seat (5) and at the position corresponding to the mandrel guide slider sliding guide groove (32), a sliding guide groove (32) is formed on the left side of the drive block sliding guide rod fixing seat (5). A mandrel moving guide hole (51) extends to the right side. The mandrel driving block reset mechanism (2) passes through the driving block reset guide rod sliding seat (4) and is fixedly connected to the mandrel driving block (3). A mandrel driving block right-moving action mechanism (6) is located on the base (1) at the left side of the driving block reset guide rod sliding seat (4) and is simultaneously connected to the lower front and lower rear sides of the mandrel driving block (3). A mandrel (7) and a pair of mandrel moving guide blocks (8) are provided. A mandrel guide block (71) is fixed at the right end of the mandrel (7). The mandrel guide block (71) and the mandrel guide block sliding guide groove (32) form a sliding pair. The right end of the mandrel (7) passes through the mandrel vertical movement guide hole (51) and the upper part of a pair of mandrel moving guide blocks (8) in sequence and forms a sliding pair with the upper part of the pair of mandrel moving guide blocks (8) to slide left and right. The lower part of the pair of mandrel moving guide blocks (8) cooperates with the vertical floating compensation device (101) of the moving guide block on the working platform (10) of the inward rolling circular stamping machine in the use state. A roller pressure release frame (9) is connected to the inward rolling circular stamping machine through the linkage (40) in the use state and forms a linkage with the inward rolling circular stamping machine. The roller pressure release frame (9) applies pressure or releases pressure to the rightward movement mechanism (6) of the mandrel drive block.

2. The die-rolling and core-pulling device according to claim 1, characterized in that: A swing arm hinge seat fixing cavity (11) is provided on the base (1) at a position corresponding to the rightward movement mechanism (6) of the mandrel drive block. A drive block reset guide rod sliding seat fixing cavity (12) is provided at a position corresponding to the drive block reset guide rod sliding seat (4), and a drive block sliding guide rod fixing cavity (13) is provided at a position corresponding to the drive block sliding guide rod fixing seat (5). The mandrel drive block rightward movement mechanism (6) is provided on the base (1) at a position corresponding to the swing arm hinge seat fixing cavity (11) and is screwed into the swing arm hinge seat fixing cavity (11) from the bottom of the base (1). The swing arm hinge seat fixing screw inside is fixed to the base (1). The lower part of the drive block reset guide rod sliding seat (4) is inserted into the drive block reset guide rod sliding seat fixing cavity (12) and the drive block reset guide rod sliding seat fixing screw is screwed into the drive block reset guide rod sliding seat fixing cavity (12) from the bottom of the base (1) and fixed to the base (1). The lower part of the drive block sliding guide rod fixing seat (5) is inserted into the drive block sliding guide rod fixing cavity (13) and the drive block sliding guide rod fixing screw is screwed into the drive block sliding guide rod fixing cavity (13) from the bottom of the base (1) and fixed to the base (1).

3. The die-rolling and core-pulling device according to claim 1, characterized in that: A guide rod support plate fixing cavity (14a) is provided at the left end of the base (1) in a state parallel to the short side direction of the base (1). A front wall plate fixing cavity (14b) is provided at the right side of the front end of the guide rod support plate fixing cavity (14a) in a state parallel to the long side direction of the base (1). A rear wall plate fixing cavity (14c) is provided at the right side of the rear end of the guide rod support plate fixing cavity (14a) in a state parallel to the long side direction of the base (1). The front and rear wall plate fixing cavities (14b, 14c) are parallel to each other. The core rod drive block reset mechanism (2) is located on the upward side of the left end of the base (1) at the position corresponding to the guide rod support plate fixing cavity (14a), the front wall plate fixing cavity (14b) and the rear wall plate fixing cavity (14c).

4. The die-rolling and core-pulling device according to claim 3, characterized in that: A pair of parallel mandrel drive block reset guide rod sliding sleeve holes (41) are provided on the drive block reset guide rod sliding seat (4) and at the upper part of the drive block reset guide rod sliding seat (4). A mandrel drive block reset guide rod sliding sleeve (411) is provided in the mandrel drive block reset guide rod sliding sleeve hole (41). A pair of mandrel drive block reset guide rod fixing holes (33) are provided on the mandrel drive block (3) and at the position corresponding to the mandrel drive block reset guide rod sliding sleeve hole (41). The mandrel drive block reset mechanism (2) includes a guide rod support plate (21), a front wall plate (22), a rear wall plate (23), and a pair of mandrel drive block reset guide rods (21, 22, 33, 44, 54, 64, 75, 84, 85 ... 4) and a pair of guide rod return springs (25). The lower part of the guide rod support plate (21) is inserted into the guide rod support plate fixing cavity (14a) and the guide rod support plate fixing screw is screwed into the guide rod support plate fixing cavity (14a) from the bottom of the base (1) and fixed to the base (1). A pair of guide rod sliding sleeve holes are opened on the upper part of the guide rod support plate (21) in a front-to-back correspondence. A pair of guide rod sliding sleeves (211) are provided in the pair of guide rod sliding sleeve holes. The front wall plate (22) and the rear wall plate (23) are front-to-back correspondences and the lower parts are respectively inserted into the front and rear wall plate fixing cavities (14b, 14c) and screwed into the front and rear wall plate fixing cavities (14b, 14c) from the bottom of the base (1) respectively. The front and rear wall plates are fixed with screws in the fixed cavity (14b, 14c). A pair of mandrel drive block reset guide rods (24) move back and forth relative to each other. The left end of the pair of mandrel drive block reset guide rods (24) slides with the pair of guide rod sleeves (211), while the right end of the pair of mandrel drive block reset guide rods (24) passes through the mandrel drive block reset guide rod sleeves (411) and is fixed with the mandrel drive block (3) at the position corresponding to the fixing hole (33) of the pair of mandrel drive block reset guide rods. A guide rod reset spring is formed at the left end of the pair of mandrel drive block reset guide rods (24) and at the right side of the guide rod support plate (21). A spring-supported stepped ring (241) is provided, and a pair of guide rod return springs (25) are respectively sleeved on a pair of mandrel drive block return guide rods (24). The left ends of the pair of guide rod return springs (25) are supported on the right side of the guide rod return spring support stepped ring (241), while the right ends of the pair of guide rod return springs (25) are supported on the left side of the drive block return guide rod sliding seat (4). The front left side of the roller pressure release frame (9) is in contact with the front wall panel abutting surface (221) on the upper right side of the front wall panel (22), and the rear left side of the roller pressure release frame (9) is in contact with the rear wall panel abutting surface (231) on the upper right side of the rear wall panel (23).

5. The die-rolling and core-pulling device according to claim 1, characterized in that: A pair of mandrel drive block sliding guide sleeves (34) are provided on the mandrel drive block (3) at positions corresponding to the pair of mandrel drive block sliding guide rods (31), and the pair of mandrel drive block sliding guide rods (31) are in sliding engagement with the pair of mandrel drive block sliding guide rod sleeves (34).

6. The die-rolling and core-pulling device according to claim 2, characterized in that: A hinge pad mating cavity (35) is formed at the lower part of the front end face and the rear end face of the mandrel drive block (3), and a hinge pad hinge pin screw hole (351) is opened in the hinge pad mating cavity (35); the rightward movement mechanism (6) of the mandrel drive block includes a swing arm hinge seat (61), a front left swing arm (62), a rear left swing arm (63), a front right swing arm (64), a rear right swing arm (65), a front hinge pad (66), a rear hinge pad (67), a swing arm shaft (68), a front roller (69a) and a rear roller (69b). The swing arm hinge seat (61) is inserted into the swing arm hinge seat fixing cavity (11) and screwed into the swing arm from the bottom of the base (1). The hinge seat fixing screw in the hinge seat fixing cavity (11) is fixed to the base (1). A left hinge ear (611) with an upward folding is formed at both the front and rear ends of the hinge seat (61). A left hinge ear pin hole (6111) is provided on the left hinge ear (611). The front left hinge arm (62) is located behind the front right hinge arm (64), and the upper ends of the front left hinge arm (62) and the front right hinge arm (64) are coaxially hinged to the front end of the hinge arm shaft (68). The lower end of the front left hinge arm (62) is hinged to the left hinge ear (6111) formed at the front end of the hinge seat (61) via the front left hinge arm pin (621) at a position corresponding to the left hinge ear pin hole (6111). Next, the lower end of the front right swing arm (64) is hinged to the front wall of the front hinge pad (66) via a front right swing arm pin (641) at a position corresponding to the front right swing arm pin hole (662) opened on the front wall of the front hinge pad (66), and the front right swing arm pin (641) is also screwed into the hinge pin screw hole (351) of the hinge pad. The rear left swing arm (63) is located in front of the rear right swing arm (65), and the upper ends of the rear left swing arm (63) and the rear right swing arm (65) are coaxially hinged to the rear end of the swing arm shaft (68). The lower end of the rear left swing arm (63) is connected to the swing arm hinge at a position corresponding to the left swing arm hinge ear pin hole (6111) at the rear end of the swing arm hinge seat (61) via a rear left swing arm pin. The left swing arm hinge lug (611) at the rear end of the connector (61) is hinged. The lower end of the rear right swing arm (65) is hinged to the rear wall of the rear hinge pad (67) via a rear right swing arm pin at a position corresponding to the rear right swing arm pin hole (672) opened on the rear wall of the rear hinge pad (67). The rear right swing arm pin is also screwed into the hinge pad hinge pin screw hole (351). The front hinge pad (66) is fitted with the hinge pad mating cavity (35) at the lower part of the front end face of the mandrel drive block (3) via a front hinge pad cavity (661) formed on the rear side of its middle portion. The left and right cavity walls of the front hinge pad cavity (661) of the front hinge pad (66) are in contact with the left and right sides of the mandrel drive block (3).The rear hinge pad (67) engages with the hinge pad mating cavity (35) located below the rear end face of the mandrel drive block (3) via a rear hinge pad cavity (671) formed on its central front side. The left and right walls of the rear hinge pad cavity (671) of the rear hinge pad (67) abut against the left and right sides of the mandrel drive block (3). The front roller (69a) is positioned on the upper front side of the front right swing arm (64) on the swing arm shaft (68). At the front end, the rear roller (69b) is positioned behind the upper end of the rear right swing arm (65) at the rear end of the swing arm shaft (68). A bushing (681) is fitted in the middle of the swing arm shaft (68) between the upper ends of the front left swing arm (62) and the rear left swing arm (63), facing each other. The lower front end of the roller pressure release bracket (9) corresponds to the front roller (69a), while the lower rear end corresponds to the rear roller (69b).

7. The die-rolling and core-pulling device according to claim 6, characterized in that: A front longitudinal arm (91) is formed at the front end of the roller pressure release frame (9), the lower end of which corresponds to the front roller (69a). A rear longitudinal arm (92) is formed at the rear end of the roller pressure release frame (9), the lower end of which corresponds to the rear roller (69b).

8. The die-rolling and core-pulling device according to claim 7, characterized in that: A front trailing arm inclined surface (911) is formed on the lower end face of the front trailing arm (91), and a rear trailing arm inclined surface (921) is formed on the lower end face of the rear trailing arm (92). The front trailing arm inclined surface (911) corresponds to and cooperates with the front roller (69a), and the rear trailing arm inclined surface (921) corresponds to and cooperates with the rear roller (69b). The front and rear trailing arm inclined surfaces (911, 921) are inclined downward from right to left.

9. The die-rolling and core-pulling device according to claim 6, characterized in that: The front left swing arm (62) and the front right swing arm (64) form a V-shape with each other; the rear left swing arm (63) and the rear right swing arm (65) form a V-shape with each other.

10. The die-rolling and core-pulling device according to claim 1, characterized in that: The aforementioned moving guide block floating compensation device (101) includes a mandrel moving guide block floating seat (1011), a mandrel moving guide block first support spring (1012), and a mandrel moving guide block second support spring (1013). The mandrel moving guide block floating seat (1011) is disposed on the working platform (10) of the inward rolling circular stamping forming machine. A first support spring cavity (10111) and a second support spring cavity (10112) are spaced apart on the mandrel moving guide block floating seat (1011). The first support spring (1012) of the mandrel moving guide block is disposed in the first support spring cavity (10111). 11) Inside, the second support spring (1013) of the mandrel moving guide block is set inside the second support spring cavity (10112). The left mandrel moving guide block of the pair of mandrel moving guide blocks (8) is set up and down in the first support spring cavity (10111) and its bottom is in contact with the upper end of the first support spring (1012) of the mandrel moving guide block. The right mandrel moving guide block of the pair of mandrel moving guide blocks (8) is set up and down in the second support spring cavity (10112) and its bottom is in contact with the upper end of the second support spring (1013) of the mandrel moving guide block.

Images