A blank feeding and positioning mechanism on a welding piece cold heading forming equipment

Abstract

The present invention provides a blank feeding and positioning mechanism on a welding piece cold heading forming device, which belongs to the field of mechanical technology. It comprises a fuselage, a hydraulic cylinder and a rotating wheel, a linkage plate is fixedly arranged on the push rod of the hydraulic cylinder, a plurality of positioning ports are evenly arranged circumferentially on the rotating wheel, and the positioning ports can be located directly below the unloading chute, a first pressing block is fixedly arranged on the linkage plate, a first guide hole is horizontally opened on the fuselage, a first slider is slidably connected in the first guide hole, a first roller matched with the side of the first pressing block is rotatably connected on the first slider, two push plates corresponding to the two hanging arms are arranged on the fuselage, a second roller is rotatably connected to one end of the push plate close to the second pressing block, a plurality of limit plates located below the push plate are fixedly arranged on the push plate, and a plurality of trajectory control components corresponding to the limit plates are arranged on the fuselage. The invention has the advantages of being able to push the blanks in an orderly manner while keeping the blanks positioned.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a blank feeding and positioning mechanism on welding piece cold heading forming equipment. Background Art

[0002] Immersion brazing, also known as liquid medium brazing, is a process in which the weldment is partially or completely immersed in salt, mixture solution or brazing material solution, relying on the heat of these liquid media to achieve brazing. X55 welding pieces, drill bit hard welding pieces, etc., due to their small size, high precision requirements, and multiple surface textures, have low production efficiency, complex molding equipment, and cumbersome control. Summary of the invention

[0003] The purpose of the present invention is to provide a blank feeding and positioning mechanism on a welding piece cold heading forming device in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to push the blank in an orderly manner under the premise of being positioned.

[0004] The object of the present invention can be achieved through the following technical scheme: a blank feeding and positioning mechanism on a welding piece cold heading forming equipment, characterized in that it comprises a machine body, a hydraulic cylinder, a material discharge chute and a rotating wheel, a linkage plate is fixedly arranged on the push rod of the hydraulic cylinder, a plurality of positioning holes are evenly arranged circumferentially on the rotating wheel, the positioning holes can be located directly below the material discharge chute, a first pressing block is fixedly arranged on the linkage plate, a first guide hole is horizontally opened on the machine body, a first slider is slidably connected in the first guide hole, a first roller cooperating with the side surface of the first pressing block is rotatably connected to the first slider, a first return spring is arranged between the first slider and the first guide hole, a second guide hole is longitudinally opened on the first slider, and the second guide hole is longitudinally opened on the first slider. A first wedge block is slidably connected in the hole, a second return spring is connected between the first wedge block and the second guide hole, the guide inclined surface of the first wedge block faces one side of the first guide hole, and the first wedge block is located on the side of the vertical plane where the axis of the rotating wheel is located close to the first guide hole; when the first pressure block moves downward, it can drive the first sliding block to move in the direction of the first guide hole, and when the first sliding block moves in the direction away from the first guide hole, the first wedge block can rotate a certain angle with the toggle wheel; a carrying plate is provided on the fuselage, and the rotation of the rotating wheel can make the blank in the positioning port fall onto the carrying plate; two first hanging arms are fixedly provided on the linkage plate, and a pin is rotatably connected to the first hanging arm, and the pin is rotatably connected to the second hanging arm through a torsion spring. The cam is an assembly made up of two pieces of hardware, each of which is adapted to move the two pieces of hardware together with the first and second pieces of hardware, and the two pieces of hardware being adapted to move the two pieces of hardware together with the first and second pieces of hardware. The push plate of the wheel moves horizontally, and when the push plate moves horizontally, the limit plate on the push plate can sequentially abut against the two third rollers on the inner and outer sides of the push plate; when the limit plate abuts against the third roller located on the outer side of the limit plate, the inner ends of the two push plates approach each other, and when the limit plate abuts against the third roller located on the inner side of the limit plate, the two push plates separate from each other; the inner sides of the two push plates are respectively provided with a plurality of semicircular notches, and the two corresponding notches on the two push plates can form a material opening for enclosing the blank when the two push plates approach each other, and a bayonet with an arc of between 100 and 120° is also provided on the end of the two push plates away from the discharge direction; a return spring is provided between the push plate and the fuselage to enable the push plate to approach the second pressure block.

[0005] Furthermore, two alignment rods are fixedly provided on the fuselage and are respectively located on both sides of the rotating wheel. Alignment openings corresponding to the positioning openings are respectively provided on both side surfaces of the rotating wheel. A mounting hole is provided on one end of the alignment rod facing the rotating wheel. A positioning bead is slidably connected in the mounting hole, and a first compression spring is connected between the positioning bead and the bottom of the mounting hole.

[0006] Furthermore, a third guide hole is provided on the body below the first slider, a second wedge block is longitudinally slidably connected in the third guide hole, a guide slope of the second wedge block faces the side away from the first guide hole, the first slider can abut against the end face of the second wedge block, and a second compression spring in a compressed state is connected between the second wedge block and the third guide hole.

[0007] Furthermore, a plurality of rectangular positioning blocks are fixedly arranged on the fuselage, and the push plate has limiting grooves corresponding to the positioning blocks one by one.

[0008] Rotation of the rotating wheel: the linkage plate moves downward, the first pressure block acts on the first roller, so that the first slider moves in the discharge direction, the first wedge block is compressed and breaks away from the contact with the rotating wheel. At this time, it is in the cutting stage. After the cutting is completed, the first slider is reset, the first wedge block extends out, acts on the rotating wheel, and the eccentric position of the rotating wheel is subjected to force and rotates; the second wedge block can limit the first slider to prevent it from leaving the corresponding sliding track, and when the first slider is inserted, it can smoothly enter the first guide hole by compressing the second wedge block.

[0009] In order to ensure that the rotating wheel rotates only an angle that equally divides the positioning opening each time, a positioning bead is provided, and the positioning bead can be partially inserted into the alignment opening on the rotating wheel, so that the rotation angle of the rotating wheel is accurate.

[0010] During the pushing process of the raw material, the second pressure block moves downward to act on the second roller. When the second pressure block does not act on the second roller, the push plate is reset. In a cycle of the push plate moving from forward to backward, the push plate is moved in the discharge direction. After moving a certain distance, the limit plate passes through the third roller on the positioning column on its inner side and the third roller on the positioning column on the outer side of the limit plate in turn, so that the two symmetrically distributed push plates perform the movement of "first closing and moving forward, then gradually opening and moving forward, then gradually closing and moving backward, and finally closing". During the forward movement, the blank on the carrier is pushed in the discharge direction. When gradually opening, the blank is continued to be pushed and the limit on the blank is gradually released, until the limit on the blank is completely released, and then it is gradually closed and moved backward, and the next blank is wrapped before it is completely closed. At this time, the blank is wrapped by two clamps with an arc angle of 100 to 120 degrees respectively arranged on the two pushing plates. The backward movement of the pushing plate is achieved by the pulling force of the return spring. This process is repeated repeatedly, and the blank can be first placed in the semi-enclosed limit portion formed by the two bayonet holes, and then pushed into the material opening formed by the two notches, and then sent to the die opening under the pier pressure column, and finally pushed away from the carrier plate to unload the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the cold heading forming equipment.

[0012] Figure 2 It is a structural schematic diagram of the cold heading forming equipment with a part cut away to show the positioning column.

[0013] Figure 3 This is a schematic diagram of the structure of the cold heading forming equipment after removing the linkage plate.

[0014] Figure 4 It is a top view of the cold heading forming equipment.

[0015] Figure 5 It is a three-dimensional structural schematic diagram of the finished product prepared by the cold heading forming equipment.

[0016] Figure 6 yes Figure 3 Schematic diagram of the three-dimensional structure from another perspective.

[0017] Figure 7 yes Figure 4 Section view along the AA direction.

[0018] Figure 8 yes Figure 4 Left view of .

[0019] Fig. 9 yes Figure 8 Cross-sectional view in the DD direction.

[0020] Fig.10It is a three-dimensional structural diagram of the raw material feeding mechanism and the feeding and pushing mechanism.

[0021] Fig.11 It is a cross-sectional view of the runner.

[0022] Fig.12 yes Figure 7 Enlarged view of part B in the middle.

[0023] Fig.13 yes Figure 7 Enlarged view of part C in the middle.

[0024] Fig.14 It is a schematic diagram of the three-dimensional structure of the shrapnel.

[0025] In the figure, 11, fuselage; 12, hydraulic cylinder; 13, linkage plate; 21, feeding guide hole; 22, feeding trough; 23, cutting blade; 24, rotating wheel; 25, positioning port; 26, first pressing block; 27, first guide hole; 28, first slider; 31, first roller; 32, first return spring; 33, second guide hole; 34, first wedge block; 35, second return spring; 36, carrier plate; 37, pier pressure column; 41, alignment rod; 42, alignment port; 43, mounting hole; 44, positioning bead; 51, first clamping spring; 52, third guide hole; 53, second wedge block; 54 , second clamping spring; 55, second pressure block; 56, push plate; 57, second roller; 58, limit plate; 59, positioning column; 61, pin shaft; 62, third return spring; 63, third roller; 64, material opening; 65, bayonet; 66, die opening; 67, limit groove; 71, feeding base; 72, guide groove; 73, trigger block; 74, fourth roller; 75, third pressure block; 76, fourth return spring; 77, check block; 78, check spring; 79, check slope; 81, push block; 82, retaining ring groove; 83, spring piece; 84, locking spring; 85, fifth return spring. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] like Figure 1 to Figure 14As shown, the cold forging forming equipment includes a machine body 11, a hydraulic cylinder 12, a raw material feeding mechanism, a cutting mechanism, a feeding and unloading mechanism and a forging forming mechanism. The cylinder body of the hydraulic cylinder 12 is fixed on the machine body 11, and a linkage plate 13 is fixedly provided on the push rod of the hydraulic cylinder 12. The raw material feeding mechanism includes a feeding guide hole 21 for inserting strip raw materials, and the cutting mechanism includes a unloading trough 22 arranged longitudinally and perpendicular to the feeding guide hole 21. A cutting head 23 inserted in the unloading trough 22 is fixedly provided on the linkage plate 13. The invention comprises a rotating wheel 24 rotatably connected to the machine body 11, a plurality of positioning holes 25 are evenly arranged on the rotating wheel 24 in the circumferential direction, and the positioning holes 25 can be located directly below the material discharge chute 22, a first pressing block 26 is fixedly arranged on the linkage plate 13, a first guide hole 27 is horizontally opened on the machine body 11, a first slider 28 is slidably connected in the first guide hole 27, a first roller 31 cooperating with the side of the first pressing block 26 is rotatably connected to the first slider 28, and a first return spring 3 is arranged between the first slider 28 and the first guide hole 27. 2, a second guide hole 33 is longitudinally formed on the first slider 28, a first wedge block 34 is slidably connected in the second guide hole 33, a second return spring 35 is connected between the first wedge block 34 and the second guide hole 33, the guide slope of the first wedge block 34 faces the first guide hole 27, and the first wedge block 34 is located on the side of the vertical plane where the axis of the rotating wheel 24 is located close to the first guide hole 27; when the first pressure block 26 moves downward, it can drive the first slider 28 to move in the direction of the first guide hole 27, and the first slider 28 moves to When moving in the direction away from the first guide hole 27, the first wedge block 34 can rotate with the toggle wheel 24 at a certain angle; a carrier plate 36 is provided on the fuselage 11, and the rotation of the wheel 24 can make the blank in the positioning opening 25 fall onto the carrier plate 36; the pier pressing forming mechanism includes a die opening 66 located on the carrier plate 36 and a pier pressing column 37 fixedly arranged on the linkage plate 13, and the pier pressing column 37 can punch the blank located in the die opening 66 when the linkage plate 13 moves downward; the lower end of the cutting head 23 has a covering opening adapted to the outer wall surface of the strip raw material.

[0028] Two alignment rods 41 are fixedly provided on the fuselage 11 and are respectively located on both sides of the rotating wheel 24. Alignment openings 42 corresponding to the positioning openings 25 are respectively provided on the two side surfaces of the rotating wheel 24. A mounting hole 43 is provided on one end of the alignment rod 41 facing the rotating wheel 24. A positioning bead 44 is slidably connected in the mounting hole 43, and a first clamping spring 51 is connected between the positioning bead 44 and the bottom of the mounting hole 43.

[0029] There is a third guide hole 52 opened on the fuselage 11 below the first slider 28, and a second wedge block 53 is longitudinally slidably connected in the third guide hole 52. The guiding inclined surface of the second wedge block 53 faces the side away from the first guide hole 27. The first slider 28 can abut against the end surface of the second wedge block 53, and a second clamping spring 54 in a compressed state is connected between the second wedge block 53 and the third guide hole 52.

[0030] Two first hanging arms are fixedly arranged on the linkage plate 13, and a pin shaft 61 is rotatably connected to the first hanging arms, and a second pressure block 55 is rotatably connected to the pin shaft 61 through a torsion spring. Two pushing plates 56 corresponding to the two hanging arms are arranged on the fuselage 11, and a second roller 57 is rotatably connected to one end of the pushing plate 56 close to the second pressure block 55. A plurality of limiting plates 58 located below the pushing plate 56 are fixedly arranged on the pushing plate 56, and a plurality of trajectory control components corresponding to the limiting plates 58 are arranged on the fuselage 11. The trajectory control component includes two positioning columns 59 respectively located on the inner and outer sides of the limiting plates 58, and there is a spacing between the axis of one of the positioning columns 59 and the axis of the other positioning column 59 on the same trajectory control component, and the end of the positioning column 59 close to the limiting plate 58 is rotatably connected to the third roller 63, and the end of the positioning column 59 away from the limiting plate 58 is connected to a third return spring 62 against the fuselage 11. The downward movement can push the second roller 57 and the push plate 56 connected to the second roller 57 to move horizontally. When the push plate 56 moves horizontally, the limit plate 58 on the push plate 56 can sequentially abut against the two third rollers 63 on the inner and outer sides of the push plate 56; when the limit plate 58 abuts against the third roller 63 located on the outer side of the limit plate 58, the inner ends of the two push plates 56 approach each other; when the limit plate 58 abuts against the third roller 63 located on the inner side of the limit plate 58, the two push plates 56 are close to each other. The push plates 56 are separated from each other; the inner sides of the two push plates 56 are respectively provided with a plurality of semicircular notches; the two corresponding notches on the two push plates 56 can form a material opening 64 for enclosing the blank when the two push plates 56 are close to each other; a bayonet 65 with an arc angle between 100 and 120° is also provided on one end of the two push plates 56 away from the discharge direction; a return spring is provided between the push plate 56 and the fuselage 11 to enable the push plate 56 to approach the second pressure block 55.

[0031] A plurality of rectangular positioning blocks are fixedly provided on the body 11 , and the push plate 56 has limiting grooves 67 corresponding to the positioning blocks one by one.

[0032] The raw material feeding mechanism includes a feeding base 71, two guide grooves 72 respectively arranged on both sides of the feeder base and two trigger blocks 73 respectively slidably connected in the two guide grooves 72, one end of the trigger block 73 close to the feeding direction is rotatably connected with a fourth roller 74, an extension arm located below the linkage plate 13 is fixedly arranged on the linkage plate 13, and a third pressure block 75 is rotatably connected to the extension arm, and the third pressure block 75 can move downward to push the trigger block 73 to translate in the guide groove 72, and a fourth reset spring 76 is connected between the position of the third pressure block 75 deviating from the rotation center and the extension arm to drive the third pressure block 75 to reset; a feeding hole is provided in the feeder base, and a plurality of rollers 74 are evenly arranged circumferentially at one end of the feeding hole away from the feeding direction. A dry check block 77, the inner end of which is hinged on the feeding base 71, a check spring 78 in a stretched state is connected between the outer end of the check block 77 and the wall of the feeding hole, the inner end of the check block 77 has a check slope 79, the distance from the end of the check slope 79 close to the feeding direction to the hinge point is greater than the distance from the other end of the check slope 79 to the hinge point, the other end of the trigger block 73 is fixedly provided with a push block 81 slidably connected to the feeding hole, the inner wall of the feeding hole is provided with a retaining spring groove 82, an annular spring piece 83 is clamped in the retaining spring groove 82, the middle part of the spring piece 83 protrudes toward one end of the push block 81, and a locking spring 84 is connected between the spring piece 83 and the push block 81.

[0033] Furthermore, a fifth return spring 85 is connected between the pushing block 81 and the inner wall of the feeding hole at one end of the feeding hole close to the feeding direction.

[0034] The working process of this cold heading forming equipment is as follows:

[0035] Pushing of raw materials: insert the linear or strip raw materials through the feeding hole and into the feeding guide hole 21, start the hydraulic cylinder 12, move the linkage plate 13 downward, the third pressure block 75 moves downward to push the fourth roller 74, the trigger block 73 moves in the feeding direction, the pushing block 81 squeezes the middle part of the spring piece 83, so that the inner hole space of the spring piece 83 is reduced, and the inner wall of the inner hole of the spring piece 83 is pressed on the outer wall of the raw material, the spring piece 83 and the pushing block 81 continue to move in the feeding direction, so that the raw material is pushed in the feeding direction until the end of the raw material abuts against the wall of the feeding chute 22. In this process, the check block 77 is not squeezed by the pushing block 81, and the check spring 78 provides a pulling force to the outer end of the check block 77. The check slope 79 swings to the vicinity of the raw material at a position closer to the hinge point of the check block 77, that is, it does not contact the raw material, and the raw material can be smoothly pushed in the feeding direction; during the resetting process of the hydraulic cylinder 12, the third pressure block 75 does not cause a large resistance to the fourth roller 74. Under the action of the fifth resetting spring 85, the pushing block 81 returns to its original position, and the pressure on the middle part of the spring piece 83 is weakened, and the raw material and the inner hole of the spring piece 83 are out of contact, so that the pushing block 81 does not drive the raw material to move synchronously during the return process. Furthermore, the check block 77 is "straightened" under the action of the pushing block 81, so that the part of the check block 77 farther than the hinge point is close to the raw material, that is, it contacts the raw material, preventing the raw material and the pushing block 81 from moving synchronously.

[0036] Raw material shearing: The hydraulic cylinder 12 acts to move the linkage plate 13 downward, and the cutting head 23 moves downward, so that the raw material is cut at the position of the feeding guide hole 21, and the cut blank falls into the upward positioning opening 25 on the rotating wheel 24.

[0037] Rotation of the rotating wheel 24: the linkage plate 13 moves downward, the first pressure block 26 acts on the first roller 31, so that the first slider 28 moves in the discharge direction, and the first wedge block 34 is compressed and breaks away from the contact with the rotating wheel 24. At this time, it is in the cutting stage. After the cutting is completed, the first slider 28 is reset, and the first wedge block 34 extends out and acts on the rotating wheel 24, so that the rotating wheel 24 is forced to rotate at the eccentric position; the second wedge block 53 can limit the first slider 28 to prevent it from leaving the corresponding sliding track, and when the first slider 28 is inserted, it can smoothly enter the first guide hole 27 by compressing the second wedge block 53.

[0038] In order to ensure that the rotating wheel 24 rotates only an angle that equally divides the positioning opening 25 each time, a positioning bead 44 is provided. The positioning bead 44 can be partially inserted into the alignment opening 42 on the rotating wheel 24 to make the rotation angle of the rotating wheel 24 accurate.

[0039] During the pushing process of the raw material, the second pressing block 55 moves downward to act on the second roller 57. When the second pressing block 55 does not act on the second roller 57, the pushing plate 56 is reset. In a cycle of the pushing plate 56 moving from forward to backward, the pushing plate 56 moves in the discharging direction. After moving a certain distance, the limiting plate 58 passes through the third roller 63 on the positioning column 59 located on the inner side thereof and the third roller 63 on the positioning column 59 located on the outer side of the limiting plate 58 in turn, so that the two symmetrically distributed pushing plates 56 perform the movement of "first closing and moving forward, then gradually opening and moving forward, then gradually closing and moving backward, and finally closing". In the process of moving forward, the blank on the carrier plate 36 is As it moves in the discharge direction and gradually opens, the blank is continued to be pushed and the limit on the blank is gradually released until the limit on the blank is completely released, and then it is gradually closed and moved backward. Before it is completely closed, the next blank is wrapped. At this time, the blank is wrapped by two clamps with an arc angle of 100 to 120 degrees, which are respectively arranged on the two push plates 56. The backward movement of the push plate 56 is achieved by the pulling force of the return spring. This process is repeated repeatedly, and the blank can be first placed in the semi-enclosed limit portion formed by the two bayonet holes 65, and then pushed into the material port 64 formed by the two notches, and then sent to the die port 66 below the pier pressure column 37, and finally pushed away from the carrier plate 36 to unload the material.

[0040] Pressing process: When the linkage plate 13 moves downward, the pressing column 37 also moves downward to press the blank located in the die opening 66.

[0041] Although the travel of the linkage plate 13 itself is not long, each action still has a sequence, which is: raw material pushing, raw material shearing into blanks, piercing blanks, blank pushing, and rotation of the runner 24. The runner 24 is connected to the fuselage 11 through a one-way bearing.

[0042] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A blank feeding and positioning mechanism on a welding piece cold heading forming device, characterized in that: The invention comprises a machine body (11), a hydraulic cylinder (12), a rotating wheel (24) and a material discharge chute (22), wherein a linkage plate (13) is fixedly arranged on a push rod of the hydraulic cylinder (12), a plurality of positioning holes (25) are evenly arranged on the rotating wheel (24) in a circumferential direction, and the positioning holes (25) can be located directly below the material discharge chute (22), a first pressing block (26) is fixedly arranged on the linkage plate (13), a first guide hole (27) is transversely opened on the machine body (11), a first slider (28) is slidably connected in the first guide hole (27), a first roller (31) cooperating with the side surface of the first pressing block (26) is rotatably connected to the first slider (28), a first return spring (32) is arranged between the first slider (28) and the first guide hole (27), a second guide hole (33) is longitudinally opened on the first slider (28), a first wedge block (34) is slidably connected in the second guide hole (33), and the first wedge block (34) and the second guide hole (33) are rotatably connected. A second return spring (35) is connected between the first wedge block (34), the guide slope of the first wedge block (34) faces the first guide hole (27), and the first wedge block (34) is located on the side of the vertical plane where the axis of the rotating wheel (24) is located close to the first guide hole (27); when the first pressure block (26) moves downward, it can drive the first slider (28) to move in the direction of the first guide hole (27); when the first slider (28) moves in the direction away from the first guide hole (27), the first wedge block (34) can The rotating wheel (24) is turned to rotate a certain angle; a carrier plate (36) is provided on the body (11), and the rotating wheel (24) can rotate to make the blank in the positioning opening (25) fall onto the carrier plate (36); the welding piece cold forging forming equipment comprises a forging forming mechanism, the forging forming mechanism comprises a die opening (66) located on the carrier plate (36) and a forging column (37) fixedly arranged on the linkage plate (13), and the forging column (37) can punch the blank in the die opening (66) when the linkage plate (13) moves downward; Two first suspension arms are fixedly arranged on the linkage plate (13), and a pin shaft (61) is rotatably connected to the first suspension arm. A second pressure block (55) is rotatably connected to the pin shaft (61) via a torsion spring. Two push plates (56) corresponding to the two suspension arms are arranged on the machine body (11), and a second roller (57) is rotatably connected to one end of the push plate (56) close to the second pressure block (55). A plurality of limit plates (58) located below the push plate (56) are fixedly arranged on the push plate (56). A plurality of trajectory control components corresponding to the limit plate (58) are arranged, the trajectory control components comprising two positioning columns (59) respectively located on the inner side and the outer side of the limit plate (58), a spacing is provided between the axis of one of the positioning columns (59) and the axis of the other positioning column (59) on the same trajectory control component, one end of the positioning column (59) close to the limit plate (58) is rotatably connected to a third roller (63), and one end of the positioning column (59) away from the limit plate (58) is connected to a third return spring (62) abutting against the fuselage (11), The second pressing block (55) moves downward to push the second roller (57) and the pushing plate (56) connected to the second roller (57) to move horizontally. When the pushing plate (56) moves horizontally, the limiting plate (58) on the pushing plate (56) can sequentially abut against two third rollers (63) on the inner and outer sides of the pushing plate (56); when the limiting plate (58) abuts against the third rollers (63) located on the outer side of the limiting plate (58), the inner ends of the two pushing plates (56) approach each other; when the limiting plate (58) abuts against the third rollers (63) located on the inner side of the limiting plate (58), the inner ends of the two pushing plates (56) approach each other. 63), the two push plates (56) are separated from each other; the inner sides of the two push plates (56) are respectively provided with a plurality of semicircular notches, and the two corresponding notches on the two push plates (56) can form a material opening (64) surrounding the blank when the two push plates (56) are close to each other; the ends of the two push plates (56) away from the discharge direction are also provided with a snap-in notch (65) with an arc angle between 100 and 120 degrees; a return spring is provided between the push plates (56) and the machine body (11) to enable the push plates (56) to approach the second pressure block (55).

2. The blank feeding and positioning mechanism on the cold heading forming equipment of the welding piece according to claim 1 is characterized in that: Two alignment rods (41) are fixedly arranged on the body (11) and are respectively located on both sides of the rotating wheel (24). Alignment openings (42) corresponding to the positioning openings (25) are respectively provided on both side surfaces of the rotating wheel (24). A mounting hole (43) is provided on one end of the alignment rod (41) facing the rotating wheel (24). A positioning bead (44) is slidably connected in the mounting hole (43). A first compression spring (51) is connected between the positioning bead (44) and the bottom of the mounting hole (43).

3. The blank feeding and positioning mechanism on the cold heading forming equipment of the welding piece according to claim 2 is characterized in that: A third guide hole (52) is provided on the body (11) below the first sliding block (28), a second wedge block (53) is longitudinally slidably connected in the third guiding hole (52), the guiding inclined surface of the second wedge block (53) faces the side away from the first guiding hole (27), the first sliding block (28) can abut against the end surface of the second wedge block (53), and a second compression spring (54) in a compressed state is connected between the second wedge block (53) and the third guiding hole (52).

4. The blank feeding and positioning mechanism on the cold heading forming equipment of the welding piece according to claim 1, 2 or 3, characterized in that: A plurality of rectangular positioning blocks are fixedly arranged on the machine body (11), and the push plate (56) has limiting grooves (67) corresponding one to one with the positioning blocks.

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