A cold heading machine for special-shaped pipe fittings

Abstract

The present invention discloses a cold heading machine for special-shaped pipe fittings, which relates to the technical field of cold heading, and aims to solve the technical problem that the pipe fittings are operated through an adapted feeding and conveying device, and the disassembly operation is cumbersome and the adjustment efficiency is low. The cold heading machine includes a main body; a crankshaft drive assembly is rotatably arranged at one end of the main body of the cold heading machine; and a cam block is arranged on one side of the crankshaft drive assembly; and a connecting rod mechanism is arranged on the side of the main body of the cold heading machine relative to the cam block. The present invention adjusts the adaptive pipe clamping and conveying adjustment mechanism to change the two clamping and conveying cavities distributed up and down, cooperates with the crankshaft drive assembly and the connecting rod mechanism with the assistance of a ratchet mechanism to perform cold heading conveying operations on special-shaped pipe fittings including those with conventional cross-sections of circular, polygonal, elliptical, etc., thereby improving the operating efficiency of the cold heading machine main body in adapting to the production of parts of different shapes and realizing the multifunctional operation requirements.

Description

Technical Field

[0001] The invention relates to the technical field of cold heading, and more particularly to a cold heading machine for special-shaped pipe fittings. Background Art

[0002] Cold heading machine is a special equipment mainly used for batch production of nuts, bolts and other fasteners. The pipe material is fed through roller transmission, and the feeding, cutting, ball pressing, angle pressing, punching and several processes are completed by one machine. The cold heading stations are arranged horizontally, with the characteristics of accurate positioning, stable operation and convenient maintenance. It is suitable for manufacturers to mass produce rivets, bolts and other fasteners. The working process of cold heading machines on the market is that the pipe material is fed through roller transmission, and the feeding, cutting, ball pressing, angle pressing, punching and several processes are completed by one machine. The cold heading stations are arranged horizontally, with the characteristics of accurate positioning, stable operation and convenient maintenance. It is suitable for manufacturers to mass produce rivets, bolts and other fasteners.

[0003] With the development of science and technology, the external shapes of fasteners such as nuts and bolts are also different. The preparation of pipe materials that are adapted to the main shape can effectively control the stable forming of fasteners such as nuts and bolts and the control of raw materials. The existing pipe materials are operated through adapted feeding and conveying equipment, and the disassembly operation is cumbersome and the adjustment efficiency is low. Therefore, it is particularly important to propose a special-shaped pipe cold heading machine that is easy to efficiently adapt to the structure to carry out feeding operations of pipe materials of different shapes. In view of this, we propose a special-shaped pipe cold heading machine. Summary of the invention

[0004] The purpose of the present invention is to provide a cold heading machine for special-shaped pipe fittings, so as to solve the technical problem that the pipe fitting materials are operated through an adapted feeding and conveying device, and the disassembly operation is complicated and the adjustment efficiency is low.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a cold heading machine for special-shaped pipe fittings, comprising a cold heading machine body; a crankshaft drive assembly is rotatably arranged at one end of the cold heading machine body; and a cam block is arranged on one side of the crankshaft drive assembly; a connecting rod mechanism is arranged on the side of the cold heading machine body opposite to the cam block; a mounting seat is arranged at the feeding end of the cold heading machine body; at least two laterally arranged opposing fixed clamping and conveying mechanisms are arranged on the mounting seat; a ratchet mechanism meshingly connected to the input end of the opposing fixed clamping and conveying mechanism is rotatably arranged at the bottom of the mounting seat; the opposing fixed clamping and conveying mechanism consists of two conveying units distributed up and down; an adaptive pipe clamping and adjusting mechanism is arranged at the output end of the conveying unit; wherein, the gap between the two adaptive pipe clamping and adjusting mechanisms distributed up and down constitutes a clamping and conveying cavity, and, the clamping and conveying cavity; and, a stress reduction mechanism is arranged at the input end of the clamping and conveying cavity.

[0006] The present invention adjusts the adaptive pipe clamping and conveying adjustment mechanism to change the two clamping and conveying cavities distributed up and down, cooperates with the crankshaft drive assembly and the connecting rod mechanism with the assistance of the ratchet mechanism to perform cold heading and conveying operations on different shaped pipe fittings including conventional cross-sections of circles, polygons, ellipses, etc., thereby improving the operating efficiency of the cold heading machine main body in adapting to the production of parts of different shapes and realizing the requirements of multi-functional operation.

[0007] Preferably, the connecting rod mechanism comprises a connecting arm A rotatably arranged on the side of the cold heading machine body; the input end of the connecting arm A contacts the cam block; and the output end of the connecting arm A is hingedly provided with an extended connecting arm.

[0008] Preferably, the ratchet mechanism includes a double-gear shaft rotatably arranged at the bottom of the mounting base; a driving connecting arm is sleeved on the middle end of the double-gear shaft; the driving connecting arm is hingedly connected to the extension connecting arm; and a ratchet block is rotatably provided on the driving connecting arm, wherein the ratchet block is connected to the ratchet at the input end of the double-gear shaft.

[0009] Preferably, the two opposing fixed clamp conveying mechanisms are meshedly connected through the output ends of the double-gear shaft to form a transmission structure for driving the conveying unit, and the two conveying units distributed up and down are meshedly connected, wherein the conveying unit is a single gear shaft structure.

[0010] Preferably, the adaptive pipe clamping and adjusting mechanism includes a connecting seat installed to the output end of the conveying unit, and a plurality of rotating seats are arranged on the connecting seat in a circular shape with equal intervals, wherein two adjacent rotating seats are connected by an annular slide rail; wherein an annular multi-stage gear ring is rotatably arranged on the annular slide rail, and a plurality of meshing convex teeth are arranged at the end of the annular multi-stage gear ring; and a meshing tooth groove for driving the annular multi-stage gear ring to rotate is arranged on the outer wall of the annular multi-stage gear ring; wherein a conveying holding block is rotatably arranged on the rotating seat, and a plurality of notches matching the shape of the special-shaped pipe fitting are arranged on the surface of the conveying holding block, wherein a plurality of spiral extrusion grooves are arranged on the inner wall of the conveying holding block, and the extrusion grooves are extrusion-matched with the meshing convex teeth.

[0011] Preferably, the stress reduction mechanism includes a fixed rotating slitting seat fixed on the mounting seat; a retaining seat is rotatably arranged inside the fixed rotating slitting seat, and a plurality of long grooves are arranged in a circular shape with equal intervals on the retaining seat; a plurality of slitting heads are arranged in a circular shape with equal intervals on the surface of the fixed rotating slitting seat, and a limiting guide protrusion that slides with the long groove is arranged on the slitting head relative to the long groove.

[0012] Preferably, the stress reduction mechanism also includes a double-toothed ring rotatably arranged on the fixed rotating cutting seat, and a driving motor fixed on the mounting seat is arranged on the side of the double-toothed ring, and a driving gear meshingly connected to the double-toothed ring is arranged at the output end of the driving motor.

[0013] Preferably, the slitting cutter head is provided with driving teeth on the side relatively close to the double tooth ring, and the slitting cutter head is in an arc-shaped structure on the side relatively close to the axis of the fixed rotating slitting seat, and the slitting cutter head is provided with extrusion slitting teeth with a cross-section that is small on the outside and large on the inside on the side relatively close to the axis of the fixed rotating slitting seat, wherein the end of the extrusion slitting tooth is provided with a bevel surface.

[0014] Preferably, the driving motor drives the driving gear so that the double-toothed ring rotates and drives a plurality of slitting and cutting heads to perform rotational motion to extrude and deform the cold-headed tube, causing stress changes in the processing section and the connecting section of the cold-headed tube, thereby reducing irregular deformation of the processing section of the cold-headed tube due to torsional stress during the fixed-angle transportation of the cold-headed tube; and, the slitting and cutting heads are arranged based on the bevel surface, so that after the plurality of slitting and cutting heads slitting and extruding the cold-headed tube, the processing section and the connecting section of the cold-headed tube are connected, forming a retaining structure for maintaining continuous transportation of the cold-headed tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention adjusts the adaptive pipe clamping and conveying adjustment mechanism to change the two clamping and conveying cavities distributed up and down, cooperates with the crankshaft drive assembly and the connecting rod mechanism with the assistance of the ratchet mechanism to perform cold heading and conveying operations on different shaped pipe fittings including conventional cross-sections of circles, polygons, ellipses, etc., thereby improving the operating efficiency of the cold heading machine body in adapting to the production of parts of different shapes and realizing the requirements of multi-functional operation.

[0017] 2. The cam block of the present invention is rotated to squeeze the end of the connecting arm A to form a rotational offset operation, so that the output end of the connecting arm A pushes the extended connecting arm to synchronously output power to synchronize the opposite fixed clamp conveying mechanism, effectively reducing the cost of power equipment for the opposite fixed clamp conveying mechanism and improving synchronization during operation.

[0018] 3. The present invention inputs power through the connecting rod mechanism, causing the driving connecting arm to perform rotational adjustment, and causes the ratchet block to produce unengaged rotational adjustment through the driving connecting arm. After the connecting rod mechanism resets, the driving connecting arm is caused to rotate relatively in the opposite direction. The ratchet block is engaged with the double-gear shaft so that the double-gear shaft rotates synchronously, providing unidirectional power input for the opposite fixed clamp conveying mechanism.

[0019] 4. The present invention causes the conveying units to rotate in opposite directions through the meshing connection of the conveying units distributed up and down, so that the adaptive pipe clamping and adjusting mechanism arranged at the end of the conveying unit rotates to continuously feed different special-shaped pipe fittings.

[0020] 5. The present invention makes the annular multi-stage gear ring perform rotational adjustment by engaging the meshing tooth grooves of the annular multi-stage gear ring with an external tool, and cooperates with the meshing convex teeth on the annular multi-stage gear ring to perform an extrusion operation on the spiral extrusion groove, so that the conveying and holding block on the rotating seat is rotated and adjusted to make the grooves of different shapes relatively close to each other, forming different clamping and conveying cavities to hold and convey pipes of different shapes and special shapes, and perform plug-in operation with the adapter mold base during the cold forging process.

[0021] 6. The present invention uses a driving motor to input power so that the driving gear drives the double gear ring to rotate, and the rotating driving gear synchronously drives the slitting cutter head to rotate, and cooperates with the long groove and the limiting guide protrusion to slide, so that the slitting cutter head maintains a stable unfolded or folded rotational movement, and the folded and closed slitting cutter head is used to extrude the pipe fittings, resulting in changes in stress between the processing section and the connecting section of the cold-headed pipe fittings, effectively avoiding twisting of the pipe fittings during conventional winding, and generating twisting stress during the holding conveying process of the adaptive pipe clamping and adjusting mechanism, causing deformation of the pipe fittings due to excessive stress, resulting in defects in the preparation process or the prepared parts.

[0022] 7. The present invention performs an annular extrusion operation on the pipe fittings based on a plurality of annularly distributed slitting cutter heads. The extrusion operation causes excessive deformation of the extrusion portion of the pipe fitting compared to conventional bidirectional extrusion, which makes it easy for the pipe fitting to be inserted into the mold because its deformation portion is larger than the hole groove of the mold, resulting in motion interference and deviation of the pipe fitting insertion; and the beveled surface setting at the end of the slitting cutter head allows the slitting cutter head to fully rotate and deflect to form extrusion work while the driving motor maintains high torque power transmission, and the processing section and connecting section of the cold-headed pipe fitting are partially connected, which is convenient for continuous transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure from another viewing angle of the present invention;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0026] Figure 4 It is a schematic diagram of the split three-dimensional structure of the adaptable pipe clamping and adjusting mechanism of the present invention;

[0027] Figure 5 It is a schematic diagram of the split three-dimensional structure of the stress reduction mechanism of the present invention;

[0028] Figure 6 It is a front view structural schematic diagram of the stress reduction mechanism of the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the slitting cutter head of the present invention.

[0030] Description of the numbers in the figure:

[0031] 1. Cold heading machine body; 2. Crankshaft drive assembly; 3. Connecting rod mechanism; 4. Mounting seat; 5. Opposite fixed clamping and conveying mechanism; 6. Ratchet mechanism; 7. Conveying unit; 8. Adaptive pipe clamping and conveying adjustment mechanism; 9. Stress reduction mechanism;

[0032] 201, cam block;

[0033] 301, connecting arm A; 302, extending connecting arm;

[0034] 601, double gear shaft; 602, driving connecting arm; 603, ratchet block;

[0035] 801, connecting seat; 8011, rotating seat; 8012, annular slide rail; 802, annular multi-stage gear ring; 8021, meshing convex teeth; 8022, meshing tooth grooves; 803, conveying and holding block; 8031, missing groove; 8032, extrusion groove;

[0036] 901, fixed rotating slitting seat; 902, holding seat; 9021, long groove; 903, slitting cutter head; 9031, limiting guide protrusion; 9032, driving tooth; 9033, extruding slitting tooth; 9034, beveled surface; 904, double gear ring; 905, driving motor; 9051, driving gear. DETAILED DESCRIPTION

[0037] like Figures 1 to 7As shown, the present invention relates to a special-shaped pipe cold heading machine, comprising a cold heading machine body 1; a crankshaft drive assembly 2 is rotatably provided at one end of the cold heading machine body 1; and a cam block 201 is provided on one side of the crankshaft drive assembly 2; a connecting rod mechanism 3 is provided on the side of the cold heading machine body 1 opposite to the cam block 201; a mounting seat 4 is provided at the feeding end of the cold heading machine body 1; at least two laterally arranged opposite fixed clamping conveying mechanisms 5 are provided on the mounting seat 4; a ratchet mechanism 6 meshingly connected to the input end of the opposite fixed clamping conveying mechanism 5 is rotatably provided at the bottom of the mounting seat 4; the opposite fixed clamping conveying mechanism 5 consists of two conveying units 7 distributed up and down; an adaptive pipe clamping and adjusting mechanism 8 is provided at the output end of the conveying unit 7; wherein, the gap between the two adaptive pipe clamping and adjusting mechanisms 8 distributed up and down constitutes a clamping and conveying cavity; and, a stress reduction mechanism 9 is provided at the input end of the clamping and conveying cavity. The present invention adjusts the adaptive pipe clamping and adjusting mechanism 8 to change the two clamping and conveying cavities distributed up and down, cooperates with the crankshaft drive assembly 2 and the connecting rod mechanism 3 with the assistance of the ratchet mechanism 6 to perform cold heading and conveying operations on different shaped pipe fittings including conventional cross-sections of circles, polygons, ellipses, etc., thereby improving the operating efficiency of the cold heading machine body 1 in adapting to the production of parts of different shapes and realizing the requirements of multi-functional operation.

[0038] In the embodiment of the present invention, the connecting rod mechanism 3 includes a connecting arm A301 rotatably arranged on the side of the cold heading machine body 1; the input end of the connecting arm A301 contacts the cam block 201; and the output end of the connecting arm A301 is hingedly provided with an extended connecting arm 302. The cam block 201 of the present invention is rotatably arranged to squeeze the end of the connecting arm A301 to form a rotational offset operation, so that the output end of the connecting arm A301 pushes the extended connecting arm 302 to synchronously output power, so as to synchronously link the opposite fixed clamp conveying mechanism 5, effectively reducing the cost of the power equipment required for the opposite fixed clamp conveying mechanism 5, and improving the synchronization during the operation.

[0039] In the embodiment of the present invention, the ratchet mechanism 6 includes a double gear shaft 601 rotatably arranged at the bottom of the mounting seat 4; a driving connecting arm 602 is sleeved on the middle end of the double gear shaft 601; the driving connecting arm 602 is hingedly connected to the extension connecting arm 302; and a ratchet block 603 is rotatably arranged on the driving connecting arm 602, wherein the ratchet block 603 is ratchet-connected with the input end of the double gear shaft 601. The present invention inputs power through the connecting rod mechanism 3, causing the driving connecting arm 602 to perform rotation adjustment, and causes the ratchet block 603 to produce unengaged rotation adjustment through the driving connecting arm 602, causing the driving connecting arm 602 to rotate relatively in the opposite direction after the reset movement of the connecting rod mechanism 3, and the ratchet block 603 is engaged with the double gear shaft 601 so that the double gear shaft 601 rotates synchronously, providing a unidirectional power input for the opposite fixed clamp conveying mechanism 5.

[0040] In the embodiment of the present invention, the two opposite fixed clamping conveying mechanisms 5 are meshed and connected through the output ends of the double gear shaft 601 to form a transmission structure for driving the conveying unit 7, and the two conveying units 7 distributed up and down are meshed and connected, wherein the conveying unit 7 is a single gear shaft structure. The present invention causes the conveying units 7 to rotate in opposite directions through the meshing connection of the conveying units 7 distributed up and down, so that the adaptive pipe clamping and adjusting mechanism 8 arranged at the end of the conveying unit 7 rotates, so as to continuously feed different special-shaped pipe fittings.

[0041] In an embodiment of the present invention, the adaptive pipe clamping and adjusting mechanism 8 includes a connecting seat 801 installed to the output end of the conveying unit 7, and a plurality of rotating seats 8011 are arranged in an annular shape at equal intervals on the connecting seat 801, wherein two adjacent rotating seats 8011 are connected by an annular slide rail 8012; wherein an annular multi-stage gear ring 802 is rotatably arranged on the annular slide rail 8012, and a plurality of meshing convex teeth 8021 are arranged at the end of the annular multi-stage gear ring 802; and a meshing tooth groove 8022 for driving the annular multi-stage gear ring 802 to rotate is arranged on the outer wall of the annular multi-stage gear ring 802; wherein a conveying holding block 803 is rotatably arranged on the rotating seat 8011, and a plurality of notches 8031 ​​adapted to the shape of the special-shaped pipe fitting are arranged on the surface of the conveying holding block 803, wherein a plurality of spiral extrusion grooves 8032 are arranged on the inner wall of the conveying holding block 803, and the extrusion grooves 8032 are extrusion-matched with the meshing convex teeth 8021. The present invention enables the annular multi-stage gear ring 802 to be rotationally adjusted by engaging the meshing tooth groove 8022 of the annular multi-stage gear ring 802 with an external tool, and cooperates with the meshing convex teeth 8021 on the annular multi-stage gear ring 802 to extrude the spiral extrusion groove 8032, so that the conveying and holding block 803 on the rotating seat 8011 is rotationally adjusted to make the grooves 8031 ​​of different shapes relatively close to each other, forming different clamping and conveying cavities to hold and convey pipes of different shapes and special shapes, and perform plug-in operation with the adapter mold base during the cold heading process.

[0042] In an embodiment of the present invention, the stress reduction mechanism 9 includes a fixed rotating slitting seat 901 fixed on the mounting seat 4; and, a retaining seat 902 is rotatably arranged inside the fixed rotating slitting seat 901, and a plurality of long grooves 9021 are provided on the retaining seat 902 in a circular shape with equal intervals; a plurality of slitting heads 903 are provided on the surface of the fixed rotating slitting seat 901 in a circular shape with equal intervals, and a limiting guide protrusion 9031 that slides with the long groove 9021 is provided at a position of the slitting head 903 relative to the long groove 9021.

[0043] In an embodiment of the present invention, the stress reduction mechanism 9 also includes a double-toothed ring 904 rotatably arranged on a fixed rotating cutting seat 901, and a driving motor 905 fixed on the mounting seat 4 is arranged on the side of the double-toothed ring 904, and a driving gear 9051 meshingly connected to the double-toothed ring 904 is arranged at the output end of the driving motor 905. The present invention uses a driving motor 905 to input power so that the driving gear 9051 drives the double gear ring 904 to rotate, and the rotating driving gear 9051 synchronously drives the slitting cutter head 903 to rotate, and cooperates with the long groove 9021 and the limiting guide protrusion 9031 to slide, so that the slitting cutter head 903 maintains a stable unfolding or folding rotational movement, and the folded and closed slitting cutter head 903 is used to extrude the pipe fittings, resulting in changes in stress between the processing section and the connecting section of the cold heading pipe fittings, effectively avoiding twisting of the pipe fittings during conventional winding, and generating twisting stress during the holding conveying process of the adaptive pipe clamping and adjusting mechanism 8, causing deformation of the pipe fittings due to excessive stress, resulting in defects in the preparation process or the prepared parts.

[0044] In an embodiment of the present invention, a driving tooth 9032 is provided on the side of the slitting head 903 relatively close to the double tooth ring 904, and the slitting head 903 is in an arc-shaped structure on the side relatively close to the axis of the fixed rotating slitting seat 901, and an extrusion slitting tooth 9033 with a cross-section that is small on the outside and large on the inside is provided on the side of the slitting head 903 relatively close to the axis of the fixed rotating slitting seat 901, wherein a bevel surface 9034 is provided on the end of the extrusion slitting tooth 9033.

[0045] In an embodiment of the present invention, a driving motor 905 drives a driving gear 9051 to rotate the double-toothed ring 904 to drive a plurality of slitting cutter heads 903 to perform a rotational motion to extrude and deform the cold-headed pipe fittings, thereby causing stress changes in the processing section and the connecting section of the cold-headed pipe fittings, thereby reducing irregular deformation of the processing section of the cold-headed pipe fittings due to torsional stress during the fixed-angle transportation of the cold-headed pipe fittings; and, the slitting cutter heads 903 are arranged based on the bevel surface 9034, so that after the plurality of slitting cutter heads 903 slitting and extruding the cold-headed pipe fittings, the processing section and the connecting section of the cold-headed pipe fittings are connected, thereby forming a holding structure for maintaining continuous transportation of the cold-headed pipe fittings. The present invention performs an annular extrusion operation on the pipe fitting based on a plurality of annularly distributed slitting cutter heads 903. The extrusion operation causes excessive deformation of the extruded portion of the pipe fitting compared to conventional bidirectional extrusion, which makes it easy for the pipe fitting to be inserted into the mold because its deformed portion is larger than the hole groove of the mold, resulting in motion interference and pipe insertion deviation. In addition, the beveled surface 9034 at the end of the slitting cutter head 903 is set, so that the slitting cutter head 903 can fully rotate and deflect to form an extrusion operation while the driving motor 905 maintains high torque power transmission, and the processing section and the connecting section of the cold-headed pipe fitting are partially connected, which is convenient for continuous transportation.

[0046] Working principle: This embodiment provides a cold heading machine for special-shaped pipe fittings. The following are the steps for use:

[0047] S100, pretreatment: Place the coiling device wrapped with the pipe fittings at the feeding end of the cold heading machine:

[0048] S200, adjustment process: the annular multi-stage gear ring 802 is rotated and adjusted by engaging the meshing tooth groove 8022 of the annular multi-stage gear ring 802 with an external tool, and the meshing convex teeth 8021 on the annular multi-stage gear ring 802 are used to extrude the spiral extrusion groove 8032, so that the conveying holding block 803 on the rotating seat 8011 is rotated and adjusted so that the grooves 8031 ​​of the required shape are relatively close to form different pinching and conveying cavities;

[0049] S300, driving process: by rotating the crankshaft drive assembly 2 so that the cam block 201 rotates synchronously, the end of the connecting arm A301 is squeezed to form a rotational offset operation, so that the output end of the connecting arm A301 pushes the extended connecting arm 302 to synchronously output power, so that the driving connecting arm 602 is rotated and adjusted, and the ratchet block 603 is caused to produce a non-engaged rotation adjustment by driving the connecting arm 602, and after the connecting rod mechanism 3 resets, the driving connecting arm 602 is caused to rotate in the opposite direction, and the ratchet block 603 is engaged with the double-gear shaft 601 so that the double-gear shaft 601 rotates synchronously, and a one-way power input is made for the conveying unit 7. At this time, the two conveying units 7 distributed above and below drive the driving adaptive pipe clamping and adjusting mechanism 8 to rotate in opposite directions, so that the pipe fittings are intermittently fed;

[0050] S400, deformation processing: during the intermittent feeding process, the driving motor 905 drives the driving gear 9051 to rotate the double-toothed ring 904 and drive the plurality of slitting heads 903 to perform a rotational motion to extrude and deform the cold-headed pipe fittings. Based on the plurality of slitting heads 903 distributed in an annular shape, an annular extrusion operation is performed on the pipe fittings. This extrusion operation causes excessive deformation of the pipe fittings at the extrusion point compared to conventional bidirectional extrusion, which causes the pipe fittings to be inserted into the mold easily due to the deformation point being larger than the hole groove of the mold, resulting in motion interference and deviation of the pipe fittings during insertion; and in conjunction with the beveled surface 9034 at the end of the slitting head 903, the slitting head 903 can fully rotate and deviate to form an extrusion operation while the driving motor 905 maintains a high-torque power transmission process, and the processing section and the connecting section of the cold-headed pipe fittings are partially connected, which is convenient for continuous transportation.

[0051] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A cold heading machine for special-shaped pipe fittings, characterized in that: It comprises a cold heading machine body (1); a crankshaft drive assembly (2) is rotatably arranged at one end of the cold heading machine body (1); and a cam block (201) is arranged on one side of the crankshaft drive assembly (2); and a connecting rod mechanism (3) is arranged on the side of the cold heading machine body (1) opposite to the cam block (201); The cold heading machine body (1) is provided with a mounting seat (4) at the feeding end; the mounting seat (4) is provided with at least two transversely arranged opposite fixed clamping conveying mechanisms (5); the mounting seat (4) is rotatably provided with a ratchet mechanism (6) meshingly connected with the input end of the opposite fixed clamping conveying mechanism (5); The opposite fixed clamping conveying mechanism (5) comprises two conveying units (7) distributed vertically; an adaptable pipe clamping and conveying adjustment mechanism (8) is provided at the output end of the conveying unit (7); The gap between the two upper and lower distributed adaptable pipe clamping and adjusting mechanisms (8) constitutes a clamping and conveying cavity, and the clamping and conveying cavity; and the input end of the clamping and conveying cavity is provided with a stress reduction mechanism (9); The stress reduction mechanism (9) comprises a fixed rotating slitting seat (901) fixed on the mounting seat (4), and a double toothed ring (904) rotatably arranged on the fixed rotating slitting seat (901); a plurality of slitting cutter heads (903) are arranged in a ring shape at equal intervals on the surface of the fixed rotating slitting seat (901); the double toothed ring (904) rotates to drive the plurality of slitting cutter heads (903) to perform a rotational motion to perform an extrusion deformation operation on the cold-headed pipe fitting, thereby causing stress changes in the processing section and the connection section of the cold-headed pipe fitting, thereby reducing irregular deformation of the processing section of the cold-headed pipe fitting due to torsional stress during the fixed-angle transportation of the cold-headed pipe fitting.

2. A cold heading machine for special-shaped pipe fittings according to claim 1, characterized in that: The connecting rod mechanism (3) comprises a connecting arm A (301) rotatably arranged on the side of the cold heading machine body (1); an input end of the connecting arm A (301) contacts the cam block (201); Furthermore, an extension connecting arm (302) is hingedly provided at the output end of the connecting arm A (301).

3. A cold heading machine for special-shaped pipe fittings according to claim 2, characterized in that: The ratchet mechanism (6) comprises a double gear shaft (601) rotatably arranged at the bottom of the mounting seat (4); a driving connecting arm (602) is sleeved on the middle end of the double gear shaft (601); the driving connecting arm (602) is hingedly connected to the extension connecting arm (302); Furthermore, a ratchet block (603) is rotatably provided on the driving connection arm (602), wherein the ratchet block (603) is connected to the ratchet at the input end of the double gear shaft (601).

4. A cold heading machine for special-shaped pipes according to claim 3, characterized in that: The two opposing fixed clamp conveying mechanisms (5) are meshedly connected via the output ends of the double gear shaft (601) to form a transmission structure for driving the conveying unit (7), and the two conveying units (7) distributed up and down are meshedly connected, wherein the conveying unit (7) is a single gear shaft structure.

5. A cold heading machine for special-shaped pipes according to claim 4, characterized in that: The adaptable pipe clamping and adjusting mechanism (8) comprises a connecting seat (801) mounted on the output end of the conveying unit (7), and a plurality of rotating seats (8011) are arranged in a circular shape at equal intervals on the connecting seat (801), wherein two adjacent rotating seats (8011) are connected via an annular slide rail (8012); Wherein, an annular multi-stage gear ring (802) is rotatably arranged on the annular slide rail (8012), and a plurality of meshing convex teeth (8021) are arranged at the end of the annular multi-stage gear ring (802); Furthermore, the outer wall of the annular multi-stage gear ring (802) is provided with meshing tooth grooves (8022) for driving the annular multi-stage gear ring (802) to rotate; A conveying and holding block (803) is rotatably arranged on the rotating seat (8011), and a surface of the conveying and holding block (803) is provided with a plurality of notches (8031) adapted to the shape of the special-shaped pipe fitting, wherein a plurality of spiral extrusion grooves (8032) are provided on the inner wall of the conveying and holding block (803), and the extrusion grooves (8032) are extrusion-matched with the meshing convex teeth (8021).

6. A cold heading machine for special-shaped pipes according to claim 5, characterized in that: A retaining seat (902) is rotatably arranged inside the fixed rotating cutting seat (901), and a plurality of long grooves (9021) are formed in a circular shape and at equal intervals on the retaining seat (902); The slitting cutter head (903) is provided with a limiting guide protrusion (9031) that slidably cooperates with the long groove (9021) at a position relative to the long groove (9021).

7. A cold heading machine for special-shaped pipes according to claim 6, characterized in that: A driving motor (905) fixed on the mounting seat (4) is arranged on the side of the double-toothed ring (904), and a driving gear (9051) meshingly connected with the double-toothed ring (904) is arranged at the output end of the driving motor (905).

8. A special-shaped pipe cold heading machine according to claim 7, characterized in that: The slitting cutter head (903) is provided with a driving tooth (9032) on the side relatively close to the double tooth ring (904), and the slitting cutter head (903) is in an arc-shaped structure on the side relatively close to the axis of the fixed rotating slitting seat (901), and the slitting cutter head (903) is provided with an extrusion slitting tooth (9033) with a cross section that is small on the outside and large on the inside on the side relatively close to the axis of the fixed rotating slitting seat (901), wherein the end of the extrusion slitting tooth (9033) is provided with a beveled surface (9034).

9. A special-shaped pipe cold heading machine according to claim 8, characterized in that: The driving motor (905) drives the driving gear (9051) to cause the double gear ring (904) to rotate; Furthermore, the slitting cutter head (903) is arranged based on the beveled surface (9034), so that after the slitting cutter heads (903) slit and extrude the cold-forged pipe fittings, the processing section and the connecting section of the cold-forged pipe fittings are connected, thereby forming a holding structure for maintaining continuous transportation of the cold-forged pipe fittings.

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