CN111817462A - A self-riveting rotor and a rotor pressure riveting die - Google Patents

Abstract

The invention provides a large-rotation skew round buckle self-riveting rotor and a rotor press-riveting die, which belong to the technical field of motor rotor manufacturing, and comprise a body formed by overlapping a plurality of rotor punching sheets, wherein the center of each rotor punching sheet is provided with a shaft hole, the periphery of each rotor punching sheet is provided with a wire groove, each rotor punching sheet is circumferentially and uniformly distributed with a plurality of buckling points by taking the shaft hole as the center, each buckling point comprises a positioning groove and a positioning bulge, the positioning grooves and the positioning bulges are vertically and cylindrically arranged and respectively positioned on the upper side and the lower side of the rotor punching sheet, the positioning bulges of the latter rotor punching sheet are correspondingly embedded with the positioning grooves of the former rotor punching sheet one by one, and the central axis of each positioning groove is horizontally offset by a preset distance relative to the central axis. The invention has the advantages of strong drawing force and high yield.

Description

A self-riveting rotor and a rotor pressure riveting die

technical field

The invention belongs to the technical field of motor rotor manufacturing, and relates to a self-riveting rotor and a rotor pressure riveting die with a large-turn twist-oblique round buckle.

Background technique

The rotor of the motor is subjected to the time-varying magnetic flux, and eddy currents are induced in it, resulting in energy loss. To reduce eddy current losses, the rotor is usually composed of a number of thin rotor laminations, or stacks, that are stacked together in a well-known "skew" relationship.

For example, Chinese Patent Application No. 95117706.0, discloses a method and apparatus for setting a skew angle, including a skew pin used to help determine the orientation of an apparatus having a central axis for stacking motor rotors Laminates. The skew pin is movable in at least one predetermined angular orientation relative to the axis of the central shaft. The tool includes: a first member shaped to be positioned in a generally spatially expanded relationship with a concentric axis and having at least one location thereon corresponding to a predetermined rotor lamination stack height; and a second member positioned in a predetermined relationship on the on the first member at a position corresponding to a predetermined stacking height of the rotor laminations. The skew pin may be located on a scale corresponding to one or more locations on the second member to orient the skew pin at a corresponding angular orientation relative to the central axis.

However, this method and device can only be applied to the small-angle skew of the rotor punching piece, which leads to the problem of uneven distribution of rotor mass. To solve this problem, the applicant previously provided a large-turn skew self-riveting rotor. The publication number is CN204349609U, which includes a body formed by superimposing multiple rotor punching sheets, a shaft hole is opened at the axis of the rotor punching sheet, and four positioning bumps are evenly distributed around the shaft hole on the rotor punching sheet. The positioning bumps are symmetrical along the radial center of the rotor punching piece, and an extension hole is opened at one end of each positioning bump.

However, in this rotor structure, in order to achieve a skewed guiding effect when the buckle point is self-riveting, the buckle point is designed to have a long waist shape and an extension hole is opened, resulting in insufficient pulling force when the buckle point and the buckle point are riveted. , The rotor punching pieces are easy to separate, and the product yield is low. In addition, the structure of this buckle point is relatively complex, and the concentricity between the long waist-shaped buckle point and the rotor punching piece is high, which will also affect the yield and production efficiency of the product. In addition, in some rotor products, due to factors such as size, such a long waist-shaped buckle point cannot be used for the rotor punching piece.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above-mentioned problems in the existing technology, and propose a self-riveting rotor and a rotor pressure riveting die with strong pulling force and high yield rate.

The purpose of the present invention can be achieved through the following technical solutions: a self-riveting rotor with a large-turn skewed round buckle, comprising a body formed by stacking a plurality of rotor punching pieces, each rotor punching piece is provided with a shaft hole in the center, and each rotor punching piece is provided with a shaft hole. There are wire grooves on the periphery of each rotor punching piece, and the rotor punching piece is evenly distributed with a plurality of buckle points in the circumferential direction with the shaft hole as the center. Each buckle point includes a positioning groove and a positioning protrusion. The positioning groove and positioning protrusion are vertical They are arranged in a directional cylindrical shape and are located on the upper and lower sides of the rotor punching piece, respectively. The positioning protrusion of the latter rotor punching piece is fitted with the positioning groove of the previous rotor punching piece in one-to-one correspondence, and the central axis of each positioning groove is relative to the The central axis of the corresponding positioning protrusion is horizontally offset by a preset distance.

As a further improvement of the present invention, each rotor punch is provided with four buckle points, and the latter rotor punch rotates 91° to 95° relative to the previous rotor punch.

As a further improvement of the present invention, the rotor punching piece at the bottom of the body is vertically formed with a counting hole corresponding to the position of the buckle point, and the counting hole can be inserted into the positioning protrusion.

The present invention also provides a rotor pressure riveting die, which is used to manufacture the above-mentioned large-turn skewed round buckle self-riveting rotor, including a shaft hole station for punching the shaft hole of the rotor punching piece, and a shaft hole station for punching the rotor punching plate. The wire slot station of the sheet wire groove, the buckle point station for punching the rotor punching point, and the blanking station for blanking and stacking the riveting rotor punching piece, the buckle point station includes multiple sets of suitable The matching buckle point punch and buckle point concave die, the buckle point punch and buckle point concave die are respectively arranged in a cylindrical shape, and the central axis of the buckle point punch is horizontally offset with respect to the central axis of the corresponding buckle point concave die by a preset distance, and the depth of the punch punched into the rotor punch does not exceed the thickness of the rotor punch.

As a further improvement of the present invention, the blanking station includes a suitable blanking punch, a blanking die, and a torsion mechanism that drives the blanking die to rotate, and the twisting mechanism drives the blanking die to rotate by a preset angle.

As a further improvement of the present invention, the blanking punch is vertically inserted with the same number of pressing rods as the buckle points. When the rotor is blanked, the lower end of the pressing rods is embedded in the buckle points and abuts against the rotor punching pieces.

As a further improvement of the present invention, a number of ejector pins corresponding to the buckling points are inserted into the buckling point concave mold, and the buckling point punch, the buckling point concave mold and the ejector pins are enclosed to form a buckling point forming cavity.

As a further improvement of the present invention, it also includes a counting hole station arranged before the buckle point station. The counting hole station includes a counting hole punch and a counting hole concave die adapted to multiple groups, and the counting hole station is used for punching up and down. The number and position of the counting holes through the counting holes correspond to the number and positions of the buckle points, and the punching die of the counting holes can move up and down to make the counting hole station work selectively.

As a further improvement of the present invention, the shaft hole station includes a first shaft hole station and a second shaft hole station arranged before and after the wire slot station, and the diameter of the shaft hole punched by the first shaft hole station It is larger than the diameter of the shaft hole punched by the second shaft hole station.

As a further improvement of the present invention, the first shaft hole station, the counting hole station, the wire groove station, the second shaft hole station, the buckle point station, and the blanking station are arranged in sequence.

Based on the above technical solutions, the embodiments of the present invention can at least produce the following technical effects:

1. For the rotor punching piece of the present application, the positioning protrusions and positioning grooves of the buckle points are cleverly arranged into a dislocation eccentric structure, so that when the rotor punching piece is riveted up and down, the upper positioning protrusion needs to be rotated by a certain angle in the circumferential direction. It is embedded in the positioning groove below, thereby realizing the skewing of the rotor slot. At the same time, the positioning protrusion and the positioning groove form a close fit with a consistent contour, which can effectively ensure the pulling force between the rotor punches and the final product. High yield. In addition, the cylindrical buckle point of the rotor punching piece can be punched at one time, the structure is simpler, the processing precision is lower, the production efficiency and the yield rate are higher, and the applicable rotor product range is wider.

2. After the rotor punching piece is rotated at a large angle and then riveted, it can avoid the balance deflection caused by the uneven distribution of material thickness, improve the balance effect of the rotor when it rotates, and reduce the time for manual correction.

3. The rotor punching piece at the bottom of the body is provided with counting holes corresponding to the position of the buckle point, so that the rotor punching piece is no longer riveted with the rotor punching piece of the previous body, that is, the body can be automatically separated after the riveting is completed, and The buckle point of the main body is not convex, and there is no need to perform the buckle point leveling process in the later stage, and the production efficiency is higher. In addition, during the production of rotor stacking riveting, each punching of the counting hole is equivalent to completing a body of stacking riveting, which can play the role of production counting.

Description of drawings

Figure 1 is a schematic diagram of the structure of the rotor punch.

Figure 2 is a schematic diagram of the structure of the rotor punching point stacking riveting.

Figure 3 is a schematic diagram of the structure of the rotor pressure riveting die.

FIG. 4 is a partial enlarged view of A in FIG. 3 .

Figure 5 is a schematic structural diagram of the punch part of the rotor pressure riveting die.

In the figure, 100, rotor punching piece; 110, shaft hole; 120, wire groove; 130, buckle point; 131, positioning groove; 132, positioning protrusion; 140, counting hole;

10. The first shaft hole station; 20, the counting hole station; 21, the counting hole punch; 22, the counting hole punch; 30, the wire slot station; 40, the second shaft hole station; 50, the buckle point station ;51, buckle point punch; 52, buckle point die; 53, ejector rod; 60, blanking station; 61, blanking punch; 62, blanking die; 63, torsion mechanism; 64, pressure rod ; 70, guide the station.

Detailed ways

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

As shown in FIG. 1 to FIG. 2 , the self-riveting rotor of this large-turn twisted round buckle includes a body formed by superimposing a plurality of rotor punching pieces 100. The center of each rotor punching piece 100 is provided with a shaft hole 110, and each rotor punching piece 100 is provided with a shaft hole 110. The circumference of the rotor punch 100 is provided with a slot 120, and the rotor punch 100 is circumferentially evenly distributed with four buckle points 130 with the shaft hole 110 as the center. The buckle points 130 include a positioning groove 131 and a positioning protrusion 132. The positioning protrusions 132 are arranged in a vertical cylindrical shape and are located on the upper and lower sides of the rotor punch 100 respectively. In combination, the central axis of each positioning groove 131 is horizontally offset by a predetermined distance with respect to the central axis of the corresponding positioning protrusion 132 .

According to the required skew angle of the slot 120 of the rotor body and the punching thickness of the positioning protrusion 132 of the buckle point 130, it can be known by conversion that the distance between the positioning groove 131 of each buckle point 130 and the central axis of the positioning protrusion 132 is The desired horizontal offset distance.

In the rotor punching piece 100 of the present application, the positioning protrusions 132 and the positioning grooves 131 of the buckle points 130 are cleverly arranged in a dislocation eccentric structure, so that when the rotor punching piece 100 is riveted up and down, the positioning convexity of the latter rotor punching piece 100 The lifter 132 needs to be rotated by a certain angle in the circumferential direction to be inserted into the positioning groove 131 of the previous rotor punch 100, thereby realizing the skew of the rotor slot 120, and at the same time, the positioning protrusion 132 and the positioning groove 131 form a tight fit with a consistent contour , which can effectively ensure the pulling force between the rotor punching pieces 100, and the yield of the final product is high. In addition, the cylindrical buckle point 130 of the rotor punching piece 100 can be punched at one time, the structure is simpler, the processing precision is lower, the production efficiency and yield are higher, and the applicable rotor product range is wider.

The rotation angle of the latter rotor die 100 relative to the former rotor die 100 is 91° to 95°. The rotor punching piece 100 is rotated at a large angle and then riveted, which can avoid balance deflection caused by uneven distribution of material thickness, improve the balance effect when the rotor rotates, and reduce the time for manual correction.

It is worth mentioning that the rotor punching piece 100 at the bottom of the main body is vertically formed with a counting hole 140 corresponding to the position of the buckle point 130 , and the counting hole 140 can be inserted into the positioning protrusion 132 . The rotor punching piece 100 at the bottom of the body is no longer riveted with the rotor punching piece 100 of the previous body, that is, the body can be automatically separated after the riveting is completed, and the buckle point 130 of the body does not protrude outwards, and there is no need to perform the buckle point 130 in the later stage. Leveling process, higher production efficiency. In addition, when the rotor is produced by stacking riveting, each punching of the counting hole 140 is equivalent to completing a body of stacking riveting, which can play the role of production counting.

As shown in FIG. 3 to FIG. 5 , the present invention also provides a rotor pressure riveting die, which is used to manufacture the above-mentioned self-riveting rotor with a large turn skewed round buckle, including a shaft hole 110 for punching the rotor punching piece 100 The shaft hole station, the wire groove station 30 for punching the rotor punching piece 100 wire groove 120, the buckle point station 50 for punching the rotor punching piece 100 buckle point 130, for blanking and stacking the riveting rotor The blanking station 60 of the punching sheet 100, the punching station of the buckle point 130 includes four sets of matching buckle point punches 51 and buckle point concave moulds 52. The buckle point punches 51 and the buckle point punches 52 are respectively in It is cylindrically arranged, and the central axis of the buckle point punch 51 is horizontally offset by a preset distance relative to the central axis of the corresponding buckle point female die 52, and the depth of the buckle point punch 51 punched into the rotor punch 100 does not exceed the rotor punch 100 thickness.

The blanking station 60 includes a suitable blanking punch 61 , a blanking die 62 , and a torsion mechanism 63 that drives the blanking die 62 to rotate. The twisting mechanism 63 drives the blanking die 62 to rotate by a preset angle. The blanking die 62 is provided with a locking ring whose inner diameter is slightly smaller than the outer diameter of the rotor punch 100. When the rotor punch 100 is riveted, the locking ring and the rotor punch 100 have an interference fit to provide an upward supporting force to ensure the rotor. The punching sheets 100 are attached up and down.

The plate material is punched through the shaft hole station and the wire groove station 30 to form the shaft hole 110 and wire groove 120 of the rotor punching piece 100, and then four cylindrical buckle points 130 are formed by punching at the buckle point station 50. The central axes of the punch 51 and the buckling die 52 are horizontally misaligned, so that the central axes of the positioning grooves 131 of the cylindrical buckle 130 and the positioning protrusions 132 are also horizontally misaligned. The blanking punch 61 is punched to form a disc-shaped rotor punch 100, and the rotor punch 100 is pressed into the blanking die 62, and then the blanking die 62 drives the rotor punch 100 according to the skew requirement of the wire groove 120. Rotate 91° to 95°, so that the central axis of the rotor punch 100 on the top of the blanking die 62 is always coaxial with the central axis of the positioning protrusion 132 of the rotor punch 100 to be punched, so that the rotor punch 100 The riveting is stacked up and down, and after the riveting is completed, the wire groove 120 of the rotor is naturally skewed.

For the structure and working principle of the blanking station 60, refer to CN108746322A - Rotor Piece Manufacturing Method and Mould, and details are not repeated here.

The buckle point punch 51 and the buckle point concave die 52 of the rotor pressure riveting die are not conventional upper and lower coaxial concave-convex matching structures, but are cleverly set as a dislocation structure, and then the cylindrical buckle point 130 is punched into the required dislocation In order to realize the natural skew of the wire grooves 120 after the rotor punching pieces 100 are stacked and riveted, the design is ingenious and the production efficiency is high. Moreover, the depth of the punched rotor punch 100 of the buckle point punch 51 does not exceed the thickness of the rotor punch 100, which can ensure that the shape and size of the buckle point 130 meet the requirements, and the buckle point punch 51 and buckle point female die 52 will not occur. put one's oar in.

The blanking punch 61 is vertically inserted with four pressing rods 64 corresponding to the buckle points 130 . That is to say, during blanking, the blanking punch 61 is completely abutted with the upper surface of the rotor punching piece 100, and the buckle point 130 is not easily deformed during the blanking process, so as to ensure the pulling force of the rotor.

Similarly, four push rods 53 corresponding to the buckle points 130 are inserted into the buckle point concave mold 52, and the buckle point punch 51, the buckle point concave mold 52 and the push rod 53 are enclosed to form the buckle point 130 molding. cavity. By setting the ejector rod 53 to control the punching thickness of the positioning protrusion 132 of the buckle point 130 , the consistency of the shape and size of the buckle point 130 is ensured.

In this application, it also includes a counting hole station 20 arranged before the buckle point station 50. The counting hole station 20 includes a counting hole punch 21 and a counting hole punch 22 that are adapted to four groups. The counting hole station 20 is used for punching. The counting holes 140 penetrate up and down. The number and position of the counting holes 140 correspond to the number and position of the buckle points 130 . The counting hole punch 21 can move up and down so that the counting hole station 20 can selectively work.

When the counting hole punch 21 is lowered, the counting hole station 20 is in a working state, and the plate material is punched in the counting hole station 20 to form four counting holes 140 that penetrate up and down. The position of the counting hole 140 is exactly the same, and the buckle point station 50 is equivalent to not working.

When the counting hole punch 21 rises, the counting hole station 20 is in a non-working state, and the plate material is not punched at the buckle point station 50 , and is subsequently punched at the buckle point station 50 to form the buckle point 130 .

For the structure of controlling the up and down movement of the counting hole punch 21, please refer to CN201120372053.8 Pneumatic Device for Selective Stamping Dies, which will not be repeated here.

The rotor punching piece 100 at the bottom of the body is no longer riveted with the rotor punching piece 100 of the previous body by setting the counting hole 140, that is, the body can be automatically separated after the riveting of the body is completed, and the buckle point 130 of the body does not protrude outwards, and no need for the later stage. Then carry out the deduction point 130 leveling process, and the production efficiency is higher. In addition, when the rotor is produced by stacking riveting, each punching of the counting hole 140 is equivalent to completing a body of stacking riveting, which can play the role of production counting.

Preferably, the shaft hole station includes a first shaft hole station 10 and a second shaft hole station 40 which are arranged at the front and rear of the wire groove station 30 . Further, in the rotor pressure riveting die, the first shaft hole station 10, the counting hole station 20, the wire slot station 30, the second shaft hole station 40, the buckle point station 50, and the blanking station 60 are in sequence. set up.

Setting the first shaft hole station 10 and the counting hole station 20 before the wire slot station 30 can avoid product deformation caused by the punching process of the wire groove 120, effectively ensure the accuracy of the shaft hole 110 and the counting hole 140, and The second shaft hole station 40 is arranged after the wire groove station 30 , which can correct the deformation of the shaft hole 110 caused by the punching of the wire groove 120 .

Further, before the first shaft hole station 10 is also provided with a guide station 70, the plate material is punched in the guide station 70 to punch the guide hole, and the subsequent shaft hole station, buckle point station 50, etc. are all provided with piercing holes. The positioning pin of the guide hole is used to ensure the positioning accuracy of the sheet material during blanking.

The forming steps of the rotor body in the rotor riveting die are as follows:

S1: The plate material is conveyed step by step to the first shaft hole station 10, and the first shaft hole station 10 punches the shaft hole 110;

S2: The plate material is conveyed step by step to the counting hole station 20, and the counting hole station 20 can be selectively operated;

S3: The sheet material is conveyed to the wire groove station 30 step by step, and the wire groove station 30 punches a plurality of wire grooves 120 evenly distributed in the circumferential direction;

S4: The plate material is conveyed step by step to the second shaft hole station 40, and the second shaft hole station 40 corrects the shaft hole 110;

S5: The sheet material is transported stepwise to the buckle point station 50. The buckle point station 50 includes four sets of matching buckle point punches 51 and buckle point concave molds 52, and corresponding buckle point punches 51 and buckle point punches 52. The central axis of the buckle point is horizontally offset by a preset distance, the buckle point punch 51 and the buckle point female die 52 are respectively arranged in a cylindrical shape, and the central axis of the buckle point punch 51 is horizontally offset with respect to the central axis of the corresponding buckle point female die 52 At a preset distance, and the depth of the punching punch 51 punched into the rotor punch 100 does not exceed the thickness of the rotor punch 100 , the buckle station 50 punches four cylindrical buckles 130 , and the buckles 130 include positioning grooves 131 and the positioning protrusions 132, the positioning grooves 131 and the positioning protrusions 132 are arranged in a vertical cylindrical shape and are respectively located on the upper and lower sides of the rotor punch 100. The central axis of the positioning groove 131 of each buckle point 130 is positioned relative to the corresponding position The central axis of the protrusion 132 is horizontally offset by a predetermined distance;

S6: The sheet material is conveyed step by step to the blanking station 60. The blanking station 60 includes a suitable blanking punch 61, a blanking die 62, and a torsion mechanism 63 that drives the blanking die 62 to rotate. At position 60, the plate material is punched into a disc-shaped rotor punch 100, and the rotor punch 100 is pressed into the blanking die 62 and riveted with the previous rotor punch 100 through the buckle point 130, and the torsion mechanism 63 drives the drop The die 62 rotates 91° to 95°;

S7: Repeat the above steps S1 to S6 N times, and in the first time, the counting hole station 20 in step S2 is working, the plate material is punched with 4 counting holes 140, and the 4 buckle punches 51 are correspondingly embedded in step S5 4 counting holes 140; from the 2nd to the Nth time, the counting hole station 20 does not work in step S2, and in step S5, there are 4 buckle points 130 punched from the plate material;

S8: The finished product after stacking riveting is sent out along the bottom of the blanking die 62.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (10)

1. The utility model provides a big gyration skew circle is buckled and is riveted rotor certainly, body that forms including a plurality of rotor punching coincide, the shaft hole has been seted up at every rotor punching's center, the wire casing is seted up to every rotor punching's periphery, and every rotor punching uses the shaft hole to have a plurality of knot points as central circumference equipartition, a serial communication port, every knot point includes positioning groove and location arch, positioning groove, the location arch all is vertical cylindrical setting and lies in rotor punching upper and lower both sides respectively, the location arch of a back rotor punching and the positioning groove one-to-one gomphosis of a preceding rotor punching, the central axis of every positioning groove is for corresponding the bellied central axis horizontal migration of location and predetermines the distance.

2. The large-rotation skew round-button self-riveting rotor as claimed in claim 1, wherein: each rotor punching sheet is provided with four buckling points, and the latter rotor punching sheet rotates 91 degrees to 95 degrees relative to the former rotor punching sheet.

3. The large-rotation skew round-button self-riveting rotor as claimed in claim 1, wherein: the counting hole is formed in the position, corresponding to the buckling point, of the rotor punching sheet at the bottom of the body in a vertical penetrating mode, and the counting hole can be used for being embedded into the positioning protrusion.

4. A rotor riveting die is characterized by being used for manufacturing the large-rotation skew round-buckle self-riveting rotor as claimed in any one of claims 1 to 3, and comprising a shaft hole station for punching a shaft hole of a rotor punching sheet, a wire slot station for punching a wire slot of the rotor punching sheet, a buckling point station for punching a buckling point of the rotor punching sheet, and a blanking station for blanking and overlapping the riveted rotor punching sheet, wherein the buckling point station comprises a buckling point male die and a buckling point female die which are matched in a plurality of groups, the buckling point male die and the buckling point female die are respectively in cylindrical arrangement, the central axis of the buckling point male die horizontally deviates for the central axis of the corresponding buckling point female die by a preset distance, and the depth of the buckling point male die punching the rotor punching sheet is not more than the thickness of the rotor.

5. The rotor riveting press die according to claim 4, wherein the blanking station comprises a blanking male die, a blanking female die and a torsion mechanism, the blanking male die and the blanking female die are matched, the torsion mechanism drives the blanking female die to rotate by a preset angle.

6. The rotor riveting die according to claim 4, wherein the blanking male die is vertically inserted with a number of pressing rods corresponding to the fastening points, and when the rotor punching sheet is blanked, the lower ends of the pressing rods are embedded into the fastening points and abut against the rotor punching sheet.

7. The rotor riveting press mold according to claim 4, wherein the buckling point female mold is internally inserted with a number of ejector rods corresponding to the buckling points, and the buckling point male mold, the buckling point female mold and the ejector rods are enclosed to form a buckling point forming cavity.

8. The rotor pressure riveting die of claim 4, further comprising a counting hole station arranged before the buckling point station, wherein the counting hole station comprises a counting hole male die and a counting hole female die which are matched with the plurality of groups, the counting hole station is used for punching counting holes which penetrate through the counting hole station from top to bottom, the number and the positions of the counting holes correspond to those of the buckling points, and the counting hole male die can move up and down to enable the counting hole station to selectively work.

9. The rotor riveting press mold according to claim 8, wherein the shaft hole stations comprise a first shaft hole station and a second shaft hole station which are arranged in front of and behind the wire casing station.

10. The rotor riveting press die of claim 9, wherein the first shaft hole station, the counting hole station, the wire groove station, the second shaft hole station, the point-fastening station and the blanking station are arranged in sequence.

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