CN216540688U

CN216540688U - Automatic trimming device for switch tie bolt production

Info

Publication number: CN216540688U
Application number: CN202220028696.9U
Authority: CN
Inventors: 魏宠建
Original assignee: Handan Jiacheng Railway Equipment Co ltd
Current assignee: Handan Jiacheng Railway Equipment Co ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-05-17
Anticipated expiration: 2032-01-07

Abstract

The utility model discloses an automatic trimming device for producing switch tie bolts, which comprises a rack, wherein a workbench and a stamping mechanism are arranged on the rack, the stamping mechanism is positioned above the workbench, a trimming position is arranged under the stamping mechanism, the automatic trimming device also comprises a feeding mechanism and a positioning mechanism, and the feeding mechanism comprises an arc-shaped trough, a rotating shaft, a material stirring rack and a rotary driving mechanism. Workers can place the switch tie bolts into the arc-shaped material groove at the flaring position far away from the trimming position, the rotary driving mechanism drives the rotating shaft to rotate intermittently, so that the switch tie bolts are pushed to the trimming position one by the material shifting frame, punching is carried out by the punching mechanism, burrs are cut off, and the punching head is not pressed in hand because the material loading position is far away from the punching head, so that safety accidents are avoided; the positioning mechanism can automatically position the switch tie bolt without manual positioning before stamping, so that the feeding speed is increased, and the processing efficiency is improved; the brush can sweep out the arc silo with the deckle edge of steel excision, avoids the interior jam of arc silo, realizes automatic clearance function.

Description

Automatic trimming device for switch tie bolt production

Technical Field

The utility model relates to the technical field of bolt production and processing, in particular to an automatic trimming device for switch tie bolt production.

Background

The switch tie bolt is after forging the shaping, and the cap body position at the bolt end has the deckle edge that leaves when forging, consequently need wash away the deckle edge of this cap body, and traditional method is that the manual work is held and is waited to cut the bolt and put in the below of drift, with bolt end card income bolt locating hole in, the deckle edge is taken at bolt locating hole periphery, and when the drift pushed down the switch tie bolt, the deckle edge of the all sides of the cap body can be cut off. However, the above-mentioned way of punching burrs is highly demanding for the operator, especially the hand-eye coordination is always in harmony, and the spirit is kept concentrated during the operation, whether the side punch is pressed to the hand easily causes safety accidents, and the punching and trimming operation is performed by manually inserting the bolt end of the switch tie into the bolt positioning hole, which is accurate, and the required time is either longer or shorter depending on the skill and fatigue, so the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an automatic trimming device for producing a switch tie bolt, which addresses the above-mentioned problems.

In order to achieve the aim, the utility model provides an automatic trimming device for producing a switch tie bolt, which comprises a frame, a workbench, a stamping mechanism and a feeding mechanism, wherein the workbench and the stamping mechanism are arranged on the frame, the stamping mechanism is positioned above the workbench, a trimming position is arranged right below the stamping mechanism, feed mechanism includes the arc silo, the apparatus further comprises a rotating shaft, dial work or material rest and rotary driving mechanism, the arc silo is fixed on the workstation and the opening up, the arc silo constitutes jointly with the workstation and is equipped with the bolt locating hole that link up the workstation with trouble sleeper bolt end adaptation and sliding fit's pay-off passageway, arc silo bottom just is located edging position department, the pivot is rotated and is installed in the frame, dial work or material rest fixed mounting in the pivot, rotary driving mechanism is connected with the pivot transmission, rotary driving mechanism drive pivot intermittent type rotates, the messenger dials the trouble sleeper bolt that the work or material rest promoted in the arc silo and moves to the bolt locating hole one by one.

Preferably, still include with deburring position department switch tie bolt matched with positioning mechanism, positioning mechanism is including the left socle that is located bolt locating hole one side, upper left layer setting element, left lower floor's setting element, and be located the right branch frame of bolt locating hole opposite side, upper right layer setting element, right lower floor's setting element, upper left layer setting element, left lower floor's setting element, upper right layer setting element, right lower floor's setting element all is equipped with the pole portion complex inclined plane that is used for with the switch tie bolt, upper left layer setting element, upper right layer setting element, right lower floor's setting element all is through first elastic component and right leg joint, left lower floor's setting element passes through second elastic component and left leg joint.

Preferably, the upper left layer setting element is located directly over the lower left layer setting element, and the upper right layer setting element is located directly over the lower right layer setting element, and upper left layer setting element sets up along dialling the charging stand rotation plane symmetry with left lower layer setting element, and upper right layer setting element sets up along dialling the charging stand rotation plane symmetry with right lower layer setting element, and upper left layer setting element sets up along bolt locating hole axis symmetry with upper right layer setting element, and left lower layer setting element sets up along bolt locating hole axis symmetry with right lower layer setting element.

Preferably, the first elastic assembly comprises a first pressure spring, a first guide rod and a first guide sleeve, one end of the bolt positioning hole axis, away from the upper left layer positioning piece, the upper right layer positioning piece and the lower right layer positioning piece, is fixedly provided with the first pressure spring and two first guide rods, the first pressure spring is sleeved on the first guide rod, the other end of the first pressure spring is connected with a right support, the right support is fixedly provided with the first guide sleeve corresponding to the first guide rod, and the first guide rod is slidably connected with the first guide sleeve.

Preferably, the second elastic assembly comprises a second pressure spring, a second guide rod and a second guide sleeve, the second pressure spring and the two second guide rods are fixed at one end, away from the axis of the bolt positioning hole, of the left lower layer positioning piece, the other end of the second pressure spring is connected with the left support, the second guide sleeve corresponding to the second guide rod is fixed on the left support, and the second guide rod is connected with the second guide sleeve in a sliding mode.

Preferably, the punching mechanism comprises a punch matched with the bolt rod part, and the punch is not overlapped with the right bracket in projection on a vertical surface.

Preferably, the feeding end of the arc-shaped trough is provided with a flaring, the size width of the flaring is larger than the width of the end of the switch tie bolt, and a waste discharge notch is formed in the workbench and at the discharging end of the arc-shaped trough.

Preferably, the rotary driving mechanism comprises a stepping motor mounted on the frame, a first bevel gear is mounted at the output end of the stepping motor, and a second bevel gear in meshed connection with the first bevel gear is mounted on the rotating shaft.

Preferably, a reinforcing ring seat is fixed at the bottom of the workbench and outside the bolt positioning hole, and the reinforcing ring seat is fixedly connected with the support.

Preferably, the material shifting frame comprises a plurality of shifting plates which are circumferentially distributed on the outer side of the rotating shaft; the poking plate is fixed with a brush which is in contact fit with the workbench.

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

1. the switch tie bolts are placed in the arc-shaped material groove at the flaring position far away from the trimming position, the rotary driving mechanism drives the rotating shaft to rotate intermittently by a preset angle, so that the material shifting frame pushes the switch tie bolts to move, the switch tie bolts are pushed to the trimming position one by one, the punching mechanism performs punching to cut burrs, and the feeding position is far away from the punch, so that the punch cannot be pressed in hand, and safety accidents are avoided;

2. the positioning mechanism can automatically position the switch tie bolt, so that the switch tie bolt is accurately clamped into the bolt positioning hole, positioning before stamping is not needed manually, and only loading is needed manually, so that the loading speed is increased, and the processing efficiency is improved;

3. after punching press mechanism punching press at every turn is ended, rotary driving mechanism drive is dialled the work or material rest and is rotated certain angle, and the board of dialling of deburring position department drives the deckle edge that the brush was amputated the steel and sweeps out the arc silo, falls into the breach of wasting discharge, realizes automatic clearance function, avoids blocking up in the arc silo, is convenient for last the deburring.

Drawings

FIG. 1 is a schematic diagram of an embodiment;

FIG. 2 is a top view of FIG. 1 (the punch mechanism not shown);

FIG. 3 is a schematic structural view of an arc-shaped trough;

in the figure, 1, a frame; 2. a work table; 21. a waste discharge gap; 3. a stamping mechanism; 31. a punch; 4. trimming the edge; 5. a feeding mechanism; 51. an arc-shaped trough; 511. flaring; 52. a rotating shaft; 53. a material stirring frame; 531. dialing a plate; 54. a rotation driving mechanism; 541. a stepping motor; 542. a first bevel gear; 543. a second bevel gear; 55. a feed channel; 56. bolt positioning holes; 57. a brush; 6. a switch tie bolt; 7. a positioning mechanism; 71. a left bracket; 72. a left upper layer positioning piece; 73. a left lower layer positioning member; 74. a right bracket; 75. a right upper layer positioning piece; 76. a right lower layer positioning member; 77. a first elastic member; 771. a first spring; 772. a first guide bar; 773. a first guide sleeve; 78. a second elastic member; 781. a second pressure spring; 782. a second guide bar; 783. a second guide sleeve; 8. a reinforcement ring seat.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Please refer to fig. 1: the embodiment of the application provides an automatic trimming device for producing a switch tie bolt, which comprises a rack 1, wherein a workbench 2 and a stamping mechanism 3 are installed on the rack 1, the stamping mechanism 3 is positioned above the workbench 2, the stamping mechanism 3 is the stamping mechanism 3 in the prior art, and the bolt is pressed down for trimming through the up-and-down movement of a punch 31; trimming position 4 is arranged under stamping mechanism 3, still include feed mechanism 5, feed mechanism 5 includes arc silo 51, pivot 52, dials magazine 53 and rotary driving mechanism 54, arc silo 51 is fixed on workstation 2 and the opening up, arc silo 51 constitutes with workstation 2 jointly and has just sliding fit's pay-off passageway 55 with the adaptation of trouble sleeper bolt 6 end, arc silo 51 bottom and be located trimming position 4 department is equipped with bolt locating hole 56 that link up workstation 2, pivot 52 rotates and installs in frame 1, the centre of a circle of arc silo 51 is located pivot 52 axis, dial magazine 53 fixed mounting on pivot 52, rotary driving mechanism 54 is connected with pivot 52 transmission, rotary driving mechanism 54 drives pivot 52 intermittent type and rotates, make group magazine 53 promote trouble sleeper bolt 6 in arc silo 51 to move to bolt locating hole 56 one by one.

Specifically, the rotary driving mechanism 54 drives the rotating shaft 52 to intermittently rotate by a preset angle, so that the material shifting frame 53 pushes the switch tie bolt 6 to move, the switch tie bolt 6 is manually placed in the arc-shaped trough 51, the end of the switch tie bolt 6 is positioned at the inner side of the arc-shaped trough 51 and cannot be separated, the rod part of the switch tie bolt 6 extends upwards from the opening of the arc-shaped trough 51, and the material shifting frame 53 pushes the rod part of the switch tie bolt 6 to slide in the arc-shaped trough 51; the rotary driving mechanism 54 pushes one switch tie bolt 6 to the trimming position 4 every time the rotary driving mechanism works, the end of the switch tie bolt 6 is clamped into the bolt positioning hole 56, the edge to be cut off is lapped on the workbench 2, the punching mechanism 3 punches once, the switch tie bolt 6 is pressed downwards, the rough edge on the periphery side of the cap body at the end of the switch tie bolt 6 is cut off, the trimmed switch tie bolt 6 falls down from the bolt positioning hole 56, and a collecting device can be arranged below the bolt positioning hole 56, so that the trimmed switch tie bolt 6 can be collected conveniently.

In one embodiment, to facilitate accurate positioning of the switch tie bolt 6 at the trim location 4, so that the end of the switch tie bolt 6 is accurately clamped into the bolt positioning hole 56, preferably, the trimming device also comprises a positioning mechanism 7 matched with the switch tie bolt 6 at the trimming position 4, the positioning mechanism 7 comprises a left bracket 71, a left upper positioning piece 72 and a left lower positioning piece 73 which are positioned at one side of the bolt positioning hole 56, and a right bracket 74, a right upper positioning piece 75 and a right lower positioning piece 76 which are positioned at the other side of the bolt positioning hole 56, wherein the left upper positioning piece 72, the left lower positioning piece 73, the right upper positioning piece 75 and the right lower positioning piece 76 are respectively provided with an inclined surface which is used for being matched with the rod part of the switch tie bolt 6, the left upper positioning piece 72, the right upper positioning piece 75 and the right lower positioning piece 76 are respectively connected with the right bracket 74 through a first elastic component 77, and the left lower positioning piece 73 is connected with the left bracket 71 through a second elastic component 78. The left upper layer positioning piece 72 is located right above the left lower layer positioning piece 73, the right upper layer positioning piece 75 is located right above the right lower layer positioning piece 76, the left upper layer positioning piece 72 and the left lower layer positioning piece 73 are symmetrically arranged along the rotating surface of the material shifting frame 53, the right upper layer positioning piece 75 and the right lower layer positioning piece 76 are symmetrically arranged along the rotating surface of the material shifting frame 53, the left upper layer positioning piece 72 and the right upper layer positioning piece 75 are symmetrically arranged along the axis of the bolt positioning hole 56, and the left lower layer positioning piece 73 and the right lower layer positioning piece 76 are symmetrically arranged along the axis of the bolt positioning hole 56. The first elastic component 77 comprises a first pressure spring 771, a first guide rod 772 and a first guide sleeve 773, one end of the upper left layer positioning piece 72, the upper right layer positioning piece 75 and one end of the lower right layer positioning piece 76, which are far away from the axis of the bolt positioning hole 56, are both fixed with a first pressure spring 771 and two first guide rods 772, the first pressure spring 771 is sleeved on the first guide rod 772, the other end of the first pressure spring 771 is connected with a right bracket 74, the right bracket 74 is fixed with a first guide sleeve 773 corresponding to the first guide rod 772, and the first guide rod 772 is in sliding connection with the first guide sleeve 773. The second elastic assembly 78 comprises a second pressure spring 781, a second guide rod 782 and a second guide sleeve 783, the second pressure spring 781 and the two second guide rods 782 are fixed to one end, away from the axis of the bolt positioning hole 56, of the left lower layer positioning piece 73, the other end of the second pressure spring 781 is connected with the left support 71, the second guide sleeve 783 corresponding to the second guide rod 782 is fixed on the left support 71, and the second guide rod 782 is in sliding connection with the second guide sleeve 783.

Specifically, when the kick-off frame 53 pushes the switch tie bolt 6 to move to the trimming position 4, the rod portion of the switch tie bolt 6 is in pressing contact with the inclined surfaces of the left upper positioning member 72, the left lower positioning member 73, the right upper positioning member 75, and the right lower positioning member 76, under the guiding action of each inclined surface, the switch tie bolt 6 gradually approaches and enters the bolt positioning hole 56, and at the same time, the first pressure spring 771 and the second pressure spring 781 are compressed, so that under the guiding action of the first guide rod 772 and the first guide sleeve 773, and the guiding action of the second guide rod 782 and the second guide sleeve 783, the left upper positioning member 72, the left lower positioning member 73, the right upper positioning member 75, and the right lower positioning member 76 move laterally and stably, thereby guiding the switch tie bolt 6 into the bolt positioning hole 56; moreover, because the corresponding positioning parts are arranged on the upper and lower sides of the material shifting frame 53, the material shifting frame 53 can push the switch tie bolt 6 to move stably, so that the switch tie bolt 6 is prevented from inclining and failing to enter the bolt positioning hole 56 accurately.

In one embodiment, in order to avoid interference with the right bracket 74 when the stamping mechanism 3 stamps the switch tie bolt 6, it is preferable that the stamping mechanism 3 includes a punch 31 matched with the bolt rod part, and the projection of the punch 31 and the right bracket 74 on the vertical plane is not overlapped. The right bracket 74 is provided with a multi-section bending structure, which is convenient for connecting and supporting the left upper layer positioning piece 72 and can avoid contacting with the punch 31.

In one embodiment, in order to facilitate the insertion of the end of the switch tie bolt 6 into the arc-shaped trough 51, it is preferable that a flared opening 511 is provided at the feeding end of the arc-shaped trough 51, and the size width of the flared opening 511 is larger than the width of the end of the switch tie bolt 6. Therefore, the end of the switch tie bolt 6 can be conveniently placed into the arc-shaped trough 51 through the flaring 511 by manual work, and feeding is carried out. Every punching press once, artifical limit with the switch sleeper bolt 6 of treating the deburring put into flaring 511 department to push arc silo 51 in, because the drift 31 is kept away from to the material loading position, consequently drift 31 can not be pressed in one's hands, avoids causing the incident, and need not the manual work and carry out the location before the punching press, only need carry on the material loading can, can improve machining efficiency.

In one embodiment, in order to facilitate the discharging of the burrs, it is preferable that the work table 2 has a waste discharge notch 21 at the discharging end of the arc-shaped trough 51. The burrs cut off from the bolt positioning holes 56 in the arc-shaped trough 51 can be discharged from the waste discharge gap 21. A waste collecting device is arranged below the waste discharge gap 21, so that waste can be collected conveniently.

In one embodiment, in order to drive the rotating shaft 52 to rotate, it is preferable that the rotation driving mechanism 54 includes a stepping motor 541 mounted on the frame 1, a first bevel gear 542 is mounted at an output end of the stepping motor 541, and a second bevel gear 543 engaged with the first bevel gear 542 is mounted on the rotating shaft 52. The stepping motor 541 can output a preset angular displacement according to a preset program, and drive the second bevel gear 543 and the rotating shaft 52 to rotate in sequence through the first bevel gear 542.

In one embodiment, in order to improve the supporting strength of the trimming position 4 and avoid damage to the workbench 2 caused by excessive pressure of the trimming position 4, it is preferable that a reinforcing ring seat 8 is fixed at the bottom of the workbench 2 and outside the bolt positioning hole 56, and the reinforcing ring seat 8 is fixedly connected with the bracket. Through setting up the beaded finish seat 8, can strengthen the support to bolt locating hole 56 periphery, improve support strength.

In one embodiment, in order to clean the burrs cut off from the bolt positioning holes 56 to form the arc-shaped trough 51, preferably, the material stirring frame 53 comprises a plurality of stirring plates 531 circumferentially distributed on the outer side of the rotating shaft 52; a brush 57 is fixed on the shifting plate 531, and the brush 57 is in contact fit with the workbench 2. After each punching of the punching mechanism 3 is finished, the rotary driving mechanism 54 drives the material stirring frame 53 to rotate for a certain angle, the stirring plate 531 at the trimming position 4 drives the brush 57 to sweep the burrs cut off by the steel out of the arc-shaped material groove 51, and the next stirring plate 531 pushes the next switch sleeper bolt 6 to move to the trimming position 4 and enter the bolt positioning hole 56, so that the trimming operation is circularly carried out.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

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," "secured," and the like are to be construed broadly and can, 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. 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

1. An automatic trimming device for producing a switch tie bolt comprises a frame, wherein a workbench and a stamping mechanism are arranged on the frame, the stamping mechanism is positioned above the workbench, a trimming position is arranged right below the stamping mechanism, its characterized in that still includes feed mechanism, feed mechanism includes the arc silo, the pivot, dial work or material rest and rotary drive mechanism, the arc silo is fixed on the workstation and the opening up, the arc silo constitutes jointly with the workstation and just sliding fit's pay-off passageway with trouble sleeper bolt end adaptation, arc silo bottom just is located edging position department and is equipped with the bolt locating hole that link up the workstation, the pivot is rotated and is installed in the frame, dial work or material rest fixed mounting in the pivot, rotary drive mechanism is connected with the pivot transmission, rotary drive mechanism drive pivot intermittent type rotates, make and dial the trouble sleeper bolt that the work or material rest promoted in the arc silo and remove to the bolt locating hole one by one.

2. The automatic trimming device for producing the switch tie bolt according to claim 1, further comprising a positioning mechanism matched with the switch tie bolt at the trimming position, wherein the positioning mechanism comprises a left bracket, a left upper positioning piece and a left lower positioning piece which are positioned on one side of the bolt positioning hole, and a right bracket, a right upper positioning piece and a right lower positioning piece which are positioned on the other side of the bolt positioning hole, the left upper positioning piece, the left lower positioning piece, the right upper positioning piece and the right lower positioning piece are respectively provided with an inclined plane matched with the rod part of the switch tie bolt, the left upper positioning piece, the right upper positioning piece and the right lower positioning piece are respectively connected with the right bracket through first elastic components, and the left lower positioning piece is connected with the left bracket through second elastic components.

3. The automatic trimming device for switch tie bolt production according to claim 2, wherein the upper left-layer positioning element is positioned directly above the lower left-layer positioning element, the upper right-layer positioning element is positioned directly above the lower right-layer positioning element, the upper left-layer positioning element and the lower left-layer positioning element are symmetrically arranged along the rotation plane of the material shifting frame, the upper right-layer positioning element and the lower right-layer positioning element are symmetrically arranged along the rotation plane of the material shifting frame, the upper left-layer positioning element and the upper right-layer positioning element are symmetrically arranged along the axis of the bolt positioning hole, and the lower left-layer positioning element and the lower right-layer positioning element are symmetrically arranged along the axis of the bolt positioning hole.

4. The automatic trimming device for the production of switch tie bolts according to claim 3, wherein the first elastic assembly comprises a first pressure spring, a first guide rod and a first guide sleeve, the first pressure spring and two first guide rods are fixed at one ends of the upper left layer positioning piece, the upper right layer positioning piece and the lower right layer positioning piece away from the axis of the bolt positioning hole, the first pressure spring is sleeved on the first guide rod, the other end of the first pressure spring is connected with the right support, the right support is fixed with the first guide sleeve corresponding to the first guide rod, and the first guide rod is slidably connected with the first guide sleeve.

5. The automatic trimming device for switch tie bolt production according to claim 4, wherein the second elastic assembly comprises a second pressure spring, a second guide rod and a second guide sleeve, the second pressure spring and the two second guide rods are fixed at one end, away from the bolt positioning hole axis, of the left lower layer positioning piece, the other end of the second pressure spring is connected with the left support, the second guide sleeve corresponding to the second guide rod is fixed on the left support, and the second guide rod is slidably connected with the second guide sleeve.

6. The automatic trimming device for the production of switch tie bolts according to claim 5, wherein the punching mechanism comprises a punch matched with the bolt rod part, and the punch is not overlapped with the projection of the right bracket on the vertical surface.

7. The automatic trimming device for the switch tie bolt production according to any one of claims 1 to 6, wherein a flared opening is arranged at the feeding end of the arc-shaped trough, the size width of the flared opening is larger than the width of the end of the switch tie bolt, and a waste discharge notch is arranged on the workbench and at the feeding end of the arc-shaped trough.

8. The automatic trimming device for the production of the switch tie bolt as claimed in claim 1, wherein the rotary driving mechanism comprises a stepping motor mounted on the frame, a first bevel gear is mounted at the output end of the stepping motor, and a second bevel gear meshed with the first bevel gear is mounted on the rotating shaft.

9. The automatic trimming device for the switch tie bolt production according to claim 1, wherein a reinforcing ring seat is fixed at the bottom of the workbench and outside the bolt positioning hole, and the reinforcing ring seat is fixedly connected with the bracket.

10. The automatic trimming device for the switch tie bolt production according to claim 1, wherein the material shifting frame comprises a plurality of shifting plates circumferentially distributed on the outer side of the rotating shaft; the poking plate is fixed with a brush which is in contact fit with the workbench.