CN217647631U - Self-positioning chamfering device for pin production - Google Patents

Abstract

The utility model discloses a self-positioning chamfering device for pin production, which comprises a frame, a chamfering mechanism, a feeding mechanism, a centering and positioning mechanism and a pressing mechanism; the chamfering mechanism and the centering and positioning mechanism are both provided with two. The device can realize the functions of automatic positioning, pressing, chamfering and discharging of a plurality of pin raw materials, ensure accurate processing and improve the processing efficiency; the two groups of lower positioning seats are arranged, feeding can be carried out alternately, the corresponding middle positioning mechanism is used for centering and positioning the pins during feeding, then the feeding mechanism works, the support plate and the lower positioning seats are driven by the second linear sliding table to move, so that the lower positioning seats loaded with pin raw materials move to the position under the material pressing mechanism, the support plate and the upper positioning seats are driven by the third power push rod of the material pressing mechanism to descend, and the pin raw materials on the lower positioning seats are compressed by the upper positioning seats, so that the position of the pin raw materials is fixed; and then, the two chamfering mechanisms work synchronously, and chamfering is carried out on the two ends of the pin raw material by the chamfering tool, so that the automatic chamfering function is realized.

Description

Self-positioning chamfering device for pin production

Technical Field

The utility model relates to a pin production facility technical field, especially a pin production is with self-align chamfer device.

Background

The pin is generally used for coupling, locking or positioning of the assembly, and can also be used as a part of the safety device. The cylindrical pin is fixed in the hole by interference for fixing parts, transmitting power or serving as a positioning piece. The cylindrical pins comprise common cylindrical pins, internal thread cylindrical pins, perforated pins, elastic cylindrical pins and the like. In the production process of the common cylindrical pin, two ends of the pin are chamfered through chamfering equipment.

The patent with publication number CN207709881U discloses an automatic pin chamfering machine, which includes: the base, first supporting roller, second supporting roller, drive wheel, chamfer sword. When the device is used, cut raw materials slide between the second supporting roller and the driving wheel through the feeding trough, the first movable supporting arm and the second movable supporting arm do contraction motion, the raw materials slide into the first supporting roller, the second supporting roller and the driving wheel, the first movable supporting arm and the second movable supporting arm do extension motion, and the raw materials are extruded between the first supporting roller, the second supporting roller, the first roller, the second roller and the driving friction wheel of the driving wheel; the driving friction wheel is driven by a motor to rotate, the driving friction wheel drives the raw materials to rotate, and the raw materials are chamfered by the chamfering cutter; after the chamfering is finished, the first movable supporting arm and the second movable supporting arm do contraction movement, the raw materials slide onto the charging chute, and the processing is finished.

In the chamfering machine, the pin is driven to a position between the first support roller and the second support roller and between the first roller, the second roller and the driving friction wheel of the driving wheel by the first movable support arm and the second movable support arm, and the pin cannot accurately move to a preset position due to the lack of a positioning mechanism and is chamfered by the chamfering tool, so that the position of the pin is easy to deviate, and the accurate processing is influenced; and the chamfering machine can only process one pin at a time, the time consumption for processing the pins in a large batch is long, and the processing efficiency needs to be improved.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a self-positioning chamfering device for pin production, which addresses the above technical problems.

In order to realize above-mentioned purpose, the utility model provides a pin production is with self-align chamfer device, include:

a frame;

the chamfering mechanism comprises a first linear sliding table, a chamfering support, a rotary power source, a transmission mechanism and a plurality of chamfering tools, wherein the two chamfering mechanisms are arranged oppositely;

the feeding mechanism comprises a second linear sliding table, a support plate and two groups of lower positioning seats, the second linear sliding table is fixedly connected with the rack, the support plate is arranged on a sliding seat of the second linear sliding table, the lower positioning seats are arranged on the support plate and used for placing pin raw materials, the number of the lower positioning seats in each group is the same as that of chamfering cutters of each chamfering mechanism, and the second linear sliding table is used for driving the support plate to make reciprocating linear motion so as to enable the two groups of lower positioning seats to alternately move to a gap between the two chamfering mechanisms;

the centering and positioning mechanisms are arranged on two sides of the chamfering mechanism and comprise a first power push rod, a second power push rod, a first push plate, a second push plate and a pushing column, the first power push rod and the second power push rod are oppositely arranged and are installed on the rack, the first push plate is installed at the output end of the first power push rod, a plurality of pushing columns are fixed on the first push plate, the number of the pushing columns is the same as that of a group of lower positioning seats, the second push plate is installed at the output end of the second power push rod, the pushing column is used for being matched with the second push plate to be in contact with pin raw materials on the lower positioning seats to position the pushing columns, and the pushing columns are also used for being in contact and matched with the chamfered pin raw materials on the lower positioning seats to push the chamfered pins out of the lower positioning seats;

the pressing mechanism is located right above a gap between the two chamfering mechanisms and comprises a third power push rod, a pressing plate and an upper positioning seat, the third power push rod is fixedly connected with the rack, the pressing plate is installed at the output end of the third power push rod, a plurality of upper positioning seats are fixed at the lower end of the pressing plate, the number of the upper positioning seats is the same as that of each group of lower positioning seats, and the upper positioning seats are matched with a group of lower positioning seats between the two chamfering mechanisms to compress pin raw materials on the lower positioning seats.

Further, drive mechanism includes driving shaft and a plurality of first transmission shaft, be equipped with the secondary drive axle between two adjacent first transmission shafts, the driving shaft, first transmission shaft and secondary drive axle are all rotated and are installed on the chamfer support, the driving shaft is connected with the transmission of rotary power source, install first drive pulley and second drive pulley on the driving shaft, install first driven pulley on the first transmission shaft, install the second driven pulley on the second transmission shaft, first drive pulley is connected with the transmission of first driven pulley through first driving belt, the second drive pulley passes through the transmission of second driving belt and is connected with the transmission of second driven pulley, all install the chamfer sword on first transmission shaft and the secondary drive axle.

Furthermore, the lower positioning seat and the upper positioning seat are both provided with a V-shaped groove, the opening of the V-shaped groove of the lower positioning seat faces upwards, and the opening of the V-shaped groove of the upper positioning seat faces downwards.

Furthermore, the pressing mechanism further comprises a guide sleeve and a guide rod, the guide sleeve is fixedly installed on the rack, the guide rod is slidably installed in the guide sleeve, and the lower end of the guide rod is fixedly connected with the pressing plate.

Furthermore, the chamfering tools of the chamfering mechanism are arranged in five equidistant intervals.

Furthermore, the maximum distance between the second push plate and the lower positioning seat is greater than the length of the pin raw material.

Compared with the prior art, the technical scheme has the following beneficial effects:

1. the device can realize automatic positioning of pin raw materials, ensures accurate processing, can alternately carry out feeding by arranging two groups of lower positioning seats, a corresponding middle positioning mechanism carries out centering positioning on the pins during feeding, then the feeding mechanism works, the support plate and the lower positioning seats are driven by the second linear sliding table to move, so that the lower positioning seats carrying the pin raw materials move to the position under the material pressing mechanism, the support plate and the upper positioning seats are driven by the third power push rod to descend, the upper positioning seats are matched with the lower positioning seats under the upper positioning seats, the pin raw materials on the lower positioning seats are compressed, and the position fixing of the pin raw materials is realized; the two chamfering mechanisms work synchronously, and chamfering tools chamfer two ends of the pin raw material to realize an automatic chamfering function; finally, the feeding mechanism drives the lower positioning seat to reset, a first power push rod of the corresponding centering and positioning mechanism works, and the processed pin is pushed out of the lower positioning seat by a pushing column, so that the automatic discharging function is realized;

2. this device sets up a plurality of chamfer swoves, and the pin raw materials that correspond chamfer sword quantity can be placed to every group lower positioning seat, can carry out chamfer processing to a plurality of pin raw materials, improves machining efficiency.

Drawings

Fig. 1 is a top view of an embodiment of the present invention (the swaging mechanism is not shown);

fig. 2 is a front view of an embodiment of the present invention (centering mechanism not shown);

fig. 3 is a diagram illustrating the working states of the feeding mechanism and the pressing mechanism in an embodiment of the present invention;

fig. 4 is a schematic view of a partial structure of a centering and positioning mechanism according to an embodiment of the present invention;

in the figure, 1, a frame; 2. a chamfering mechanism; 21. a first linear sliding table; 22. chamfering the bracket; 23. a source of rotational power; 24. a transmission mechanism; 241. a drive shaft; 242. a first drive shaft; 243. a second drive shaft; 244. a first drive pulley; 245. a second drive pulley; 246. a first driven pulley; 247. a second driven pulley; 248. a first drive belt; 249. a second drive belt; 25. chamfering cutter; 3. a feeding mechanism; 31. a second linear sliding table; 32. a carrier plate; 33. a lower positioning seat; 34. pin raw materials; 4. a centering and positioning mechanism; 41. a first power push rod; 42. a second power push rod; 43. a first push plate; 44. a second push plate; 45. pushing the column; 5. a material pressing mechanism; 51. a third power push rod; 52. pressing a plate; 53. an upper positioning seat; 54. a guide sleeve; 55. a guide rod.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 to 4, in an embodiment of the present invention, a self-positioning chamfering device for pin production includes: the device comprises a rack 1, a chamfering mechanism 2, a feeding mechanism 3 and a centering and positioning mechanism 4; the chamfering mechanism comprises two chamfering mechanisms 2, wherein the two chamfering mechanisms 2 are arranged oppositely and comprise five first linear sliding tables 21, a chamfering support 22, a rotary power source 23, a transmission mechanism 24 and a plurality of chamfering cutters 25, the chamfering cutters 25 arranged on the chamfering mechanisms 2 are arranged at equal intervals in the embodiment, the first linear sliding tables 21 are fixedly connected with the rack 1, the first linear sliding tables 21 are ball screw type linear sliding tables, the chamfering support 22 is installed on a sliding seat of the first linear sliding tables 21, the rotary power source 23 and the transmission mechanism 24 are installed on the chamfering support 22, the rotary power source 23 and the transmission mechanism 24 are connected with the chamfering cutters 25 in a transmission mode through the transmission mechanism 24, and the rotary power source 23 is a variable frequency motor; the two first linear sliding tables 21 work synchronously to drive the two rotary power sources 23 to move oppositely, and chamfering cutters 25 of the two chamfering mechanisms 2 are respectively contacted with the two end parts of the pin to chamfer the two ends of the pin; the feeding mechanism 3 comprises a second linear sliding table 31, a support plate 32 and lower positioning seats 33, the second linear sliding table 31 is fixedly connected with the rack 1, the second linear sliding table 31 is a ball screw type linear sliding table, the support plate 32 is installed on a sliding seat of the second linear sliding table 31, the lower positioning seats 33 are installed on the support plate 32 and used for placing pin raw materials 34, the lower positioning seats 33 are arranged into two groups, the number of each group of lower positioning seats 33 is the same as that of the chamfering tool 25 of each chamfering mechanism 2, and the second linear sliding table 31 is used for driving the support plate 32 to perform reciprocating linear motion so that the two groups of lower positioning seats 33 alternately move to a gap between the two chamfering mechanisms 2; the two centering and positioning mechanisms 4 are arranged, and the two centering and positioning mechanisms 4 are positioned on two sides of the chamfering mechanism 2; the centering and positioning mechanism 4 comprises a first power push rod 41, a second power push rod 42, a first push plate 43, a second push plate 44 and a push column 45, the first power push rod 41 and the second power push rod 42 are oppositely arranged and mounted on the rack 1, the first push plate 43 is mounted at the output end of the first power push rod 41, a plurality of push columns 45 are fixed on the first push plate 43, the number of the push columns 45 is the same as that of a group of lower positioning seats 33, the second push plate 44 is mounted at the output end of the second power push rod 42, the push columns 45 are used for being matched with the second push plate 44 to be in contact with pin raw materials 34 on the lower positioning seats 33 to position the pin raw materials, and the push columns 45 are also used for being in contact with the chamfered pin raw materials 34 on the lower positioning seats 33 to be matched to push the chamfered pins 34 out of the lower positioning seats 33; in this embodiment, the first power push rod 41 and the second power push rod 42 are air cylinders, or electric cylinders or hydraulic cylinders; the swaging mechanism 5 is located directly over the clearance between the two chamfering mechanisms 2, the swaging mechanism 5 includes a third power push rod 51, a pressing plate 52 and an upper positioning seat 53, the third power push rod 51 is fixedly connected with the frame 1, the pressing plate 52 is installed at the output end of the third power push rod 51, the lower end of the pressing plate 52 is fixed with a plurality of upper positioning seats 53, the number of the upper positioning seats 53 is the same as that of the lower positioning seats 33 of each group, and the upper positioning seats 53 are matched with a group of lower positioning seats 33 between the two chamfering mechanisms 2 to compress the pin raw materials 34 on the lower positioning seats 33. The third power push rod 51 is selected from an air cylinder, an electric cylinder or a hydraulic cylinder.

In summary, during operation, firstly, the pin raw material 34 to be chamfered is placed on the group of lower positioning seats 33 away from the gap of the chamfering mechanism 2, and if the group of lower positioning seats 33 is located on the left side of the chamfering mechanism 2, the corresponding centering and positioning mechanism 4 on the left side operates to center and position the pin raw material 34; specifically, the first power push rod 41 and the second power push rod 42 of the left centering and positioning mechanism 4 work synchronously, the first power push rod 41 drives the first push plate 43 and the push column 45 to approach the pin, the second power push rod 42 drives the second push plate 44 to approach the pin raw material 34, finally the push column 45 and the second push plate 44 are respectively contacted with two ends of the pin raw material 34, the position of the pin raw material 34 is determined, the positioning of the pin raw material 34 is realized, and the subsequent chamfering processing of the pin raw material 34 is facilitated;

then, the first power push rod 41 and the second power push rod 42 of the middle positioning mechanism on the left side contract synchronously to drive the first push plate 43, the push column 45 and the second push plate 44 to reset;

then, the feeding mechanism 3 works, the second linear sliding table 31 drives the carrier plate 32 and the lower positioning seat 33 to move rightwards, so that the lower positioning seat 33 loaded with the pin raw material 34 moves to the gap between the two chamfering mechanisms 2;

then the swaging mechanism 5 works, the third power push rod 51 drives the pressing plate 52 and the upper positioning seat 53 to descend, and the upper positioning seat 53 is matched with the lower positioning seat 33 right below the upper positioning seat 53 to tightly press the pin on the lower positioning seat 33;

then the two chamfering mechanisms 2 work synchronously, specifically, the two first linear sliding tables 21 work synchronously to drive the two rotary power sources 23 to move oppositely, the rotary power sources 23 drive the chamfering tools 25 to rotate, the chamfering tools 25 of the two chamfering mechanisms 2 are respectively contacted with the two end parts of the pin raw material 34, and chamfering is carried out on the two ends of the pin raw material 34;

during chamfering, a next pin raw material 34 to be machined is placed on the right group of empty lower positioning seats 33, the operation of the right centering and positioning mechanism 4 is the same as the operation principle of the left centering and positioning mechanism 4, and the pin raw material 34 is positioned by the ejector pin 45 and the second push plate 44 of the right centering and positioning mechanism 4 respectively to realize positioning of the pin raw material 34;

after chamfering is finished, the third power push rod 51 drives the press plate 52 and the upper positioning seat 53 to ascend and reset, and the pin raw material 34 on the lower positioning seat 33 is not pressed; then, the feeding mechanism 3 works, the second linear sliding table 31 drives the carrier plate 32 and the lower positioning seat 33 to move leftwards, so that the processed pin raw material 34 moves to the left side of the chamfering mechanism 2, the lower positioning seat 33 loaded with the pin raw material 34 to be processed moves to the gap between the two chamfering mechanisms 2, and chamfering operation of the next batch is performed;

the processed pin raw materials 34 on the left side of the chamfering mechanism 2 are moved to perform unloading operation, the first power push rod 41 of the centering and positioning mechanism 4 on the left side works, the second power push rod 42 does not move, the telescopic end of the first power push rod 41 extends out to drive the first push plate 43 and the ejector pin 45 to approach the processed pin raw materials 34, and the ejector pin 45 pushes the processed pin raw materials 34 out of the lower positioning seat 33 to achieve automatic unloading.

In an embodiment, the transmission mechanism 24 includes a driving shaft 241 and three first transmission shafts 242, a second transmission shaft 243 is disposed between two adjacent first transmission shafts 242, the driving shaft 241, the first transmission shaft 242, and the second transmission shaft 243 are rotatably mounted on the chamfering support 22 through bearings, the driving shaft 241 is in transmission connection with the rotary power source 23, the driving shaft 241 is mounted with a first driving pulley 244 and a second driving pulley 245, the first transmission shaft 242 is mounted with a first driven pulley 246, the second transmission shaft 243 is mounted with a second driven pulley 247, the first driving pulley 244 is in transmission connection with the first driven pulley 246 through a first transmission belt 248, the second driving pulley 245 is in transmission connection with the second driven pulley 247 through a second transmission belt 249, and the chamfering tools 25 are mounted on both the first transmission shaft 242 and the second transmission shaft 243.

Specifically, the rotary power source 23 drives the driving shaft 241 to rotate through the coupling, the first driving pulley 244 and the second driving pulley 245 rotate together with the driving shaft 241, the first driving pulley 244 drives the first driven pulley 246 and the first transmission shaft 242 to rotate through the first transmission belt 248, the second driving pulley 245 drives the second driven pulley 247 and the second transmission shaft 243 to rotate through the second transmission belt 249, and thus each chamfering tool 25 is driven to rotate.

In one embodiment, the lower positioning seat 33 and the upper positioning seat 53 are both provided with V-shaped grooves, the V-shaped groove opening of the lower positioning seat 33 faces upward, and the V-shaped groove opening of the upper positioning seat 53 faces downward. The V-shaped groove facilitates placement of the pin stock 34, increases the contact area with the pin stock 34, and limits radial movement of the pin stock 34.

In an embodiment, the pressing mechanism 5 further includes a guide sleeve 54 and a guide rod 55, the guide sleeve 54 is fixedly installed on the frame 1, the guide rod 55 is slidably installed in the guide sleeve 54, and the lower end of the guide rod 55 is fixedly connected with the pressing plate 52. The guide sleeve 54 and the guide rod 55 play a guiding role, so that the third power push rod 51 can drive the pressing plate 52 to stably and linearly lift.

In one embodiment, the maximum distance between the second push plate 44 and the lower locating seat 33 is greater than the length of the pin stock 34. Thus, when the ejector pin 45 pushes the finished pin out of the lower positioning seat 33, the second push plate 44 does not prevent the pin from falling.

In the embodiment, all the electrical components are connected with the power supply adapted to the electrical components through the conducting wires, and an appropriate controller should be selected according to actual conditions to meet the control requirements, and the specific connection and control sequence are well known in the art, and the electrical control is not described.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (6)

1. A pin production is with from location chamfer device includes:

a frame (1);

it is characterized by also comprising:

the chamfering mechanisms (2) are arranged in two opposite directions and comprise a first linear sliding table (21), a chamfering support (22), a rotary power source (23), a transmission mechanism (24) and a plurality of chamfering tools (25), the first linear sliding table (21) is fixedly connected with the rack (1), the chamfering support (22) is installed on a sliding seat of the first linear sliding table (21), the rotary power source (23) and the transmission mechanism (24) are installed on the chamfering support (22), the rotary power source (23) and the transmission mechanism (24) are connected, and the rotary power source (23) is in transmission connection with the chamfering tools (25) through the transmission mechanism (24);

the feeding mechanism (3) comprises a second linear sliding table (31), a support plate (32) and lower positioning seats (33), the second linear sliding table (31) is fixedly connected with the rack (1), the support plate (32) is installed on a sliding seat of the second linear sliding table (31), the lower positioning seats (33) are installed on the support plate (32) and used for placing pin raw materials (34), the lower positioning seats (33) are arranged into two groups, the number of each group of lower positioning seats (33) is the same as that of chamfering tools (25) of each chamfering mechanism (2), and the second linear sliding table (31) is used for driving the support plate (32) to do reciprocating linear motion so that the two groups of lower positioning seats (33) alternately move to a gap between the two chamfering mechanisms (2);

the centering and positioning mechanisms (4) are arranged in two and are positioned on two sides of the chamfering mechanism (2), each centering and positioning mechanism comprises a first power push rod (41), a second power push rod (42), a first push plate (43), a second push plate (44) and a pushing column (45), the first power push rods (41) and the second power push rods (42) are oppositely arranged and are installed on the rack (1), the first push plate (43) is installed at the output end of the first power push rod (41), a plurality of pushing columns (45) are fixed on the first push plate (43), the pushing columns (45) are the same as a group of lower positioning seats (33), the second push plate (44) is installed at the output end of the second power push rod (42), the pushing columns (45) are used for being matched with the second push plate (44) to be in contact with pin raw materials (34) on the lower positioning seats (33) to position the pushing columns, and the pushing columns (45) are also used for being in contact with the pin raw materials (34) chamfered on the lower positioning seats (33) to push out the lower positioning seats (33);

swager constructs (5), it is located two chamfer mechanisms (2) clearance departments directly over, it includes third power push rod (51), clamp plate (52) and last positioning seat (53), third power push rod (51) and frame (1) fixed connection, the output at third power push rod (51) is installed in clamp plate (52), clamp plate (52) lower extreme is fixed with a plurality of positioning seats (53) of going up, it is the same with the quantity of every group lower positioning seat (33) to go up positioning seat (53) quantity, go up positioning seat (53) and be in a set of lower positioning seat (33) cooperation between two chamfer mechanisms (2) with compress tightly pin raw materials (34) on lower positioning seat (33).

2. The self-positioning chamfering device for pin production according to claim 1, wherein the transmission mechanism (24) comprises a driving shaft (241) and a plurality of first transmission shafts (242), a second transmission shaft (243) is arranged between two adjacent first transmission shafts (242), the driving shaft (241), the first transmission shaft (242) and the second transmission shaft (243) are rotatably installed on the chamfering support (22), the driving shaft (241) is in transmission connection with the rotary power source (23), a first driving pulley (244) and a second driving pulley (245) are installed on the driving shaft (241), a first driven pulley (246) is installed on the first transmission shaft (242), a second driven pulley (247) is installed on the second transmission shaft (243), the first driving pulley (244) is in transmission connection with the first driven pulley (246) through a first transmission belt (248), the second driving pulley (245) is in transmission connection with the second driven pulley (247) through a second transmission belt (249), and chamfering cutters (25) are installed on the first transmission shaft (242) and the second transmission shaft (243).

3. The self-positioning chamfering device for pin production according to claim 1, wherein the lower positioning seat (33) and the upper positioning seat (53) are provided with V-shaped grooves, the opening of the V-shaped groove of the lower positioning seat (33) faces upwards, and the opening of the V-shaped groove of the upper positioning seat (53) faces downwards.

4. The self-positioning chamfering device for pin production according to claim 1, wherein the swaging mechanism (5) further comprises a guide sleeve (54) and a guide rod (55), the guide sleeve (54) is fixedly installed on the machine frame (1), the guide rod (55) is slidably installed in the guide sleeve (54), and the lower end of the guide rod (55) is fixedly connected with the pressing plate (52).

5. The self-positioning chamfering device for pin production according to claim 1, wherein the chamfering tools (25) of the chamfering mechanism (2) are provided in five equidistant intervals.

6. The self-positioning chamfering device for pin production according to claim 1, wherein the maximum distance between the second push plate (44) and the lower positioning seat (33) is greater than the length of the pin stock (34).

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