Pin assembly tool and pin assembly method

Abstract

This application provides a pin assembly fixture and method. A support member below the positioning plate defines the axial position of the pin, and a lower movable magnetic component guides part of the pin into the hole and moves the remaining pin. Two locking pin plates move in opposite directions to hold the inserted pin. Two position plates move with the locking pin plates and have permission windows. Two latching tongues connected by a latch enter only when the two windows are aligned, forming an insertion before the latch opens the retraction channel, and exiting after the latch re-blocks the channel. The early retraction of the locking pin plates is limited by the window edges. The partial holding unit may employ a thin holding head, an extension, and a lateral spring, and the positioning plate may be provided with an axial clearance cavity. This fixture constrains the recovery of excess material and the release of locking pins based on the actual plate position and cross-interlocking.

Description

Technical Field

[0001] This application relates to the field of pin assembly tooling technology, and in particular to a pin assembly tooling and method that utilizes a movable magnetic component on the support side of a positioning plate for pin insertion and excess material transfer, and constrains the retrieval and unlocking sequence by the cross-interlocking relationship between the actual position of the locking pin plate and the retrieval latch; the operation of the tooling can be completed manually or by a driving mechanism. Background Technology

[0002] The ends of the air vent blades in a car air conditioner can form a support shaft by inserting pins. When the pins are small, it is inconvenient to hold each pin individually, align it with the mounting hole, and push it in. The pin tips may also injure the operator. Furthermore, in the absence of a definite pressing end reference, the insertion depth of different pins may be inconsistent.

[0003] In batch needle loading operations, the working surface may simultaneously contain pins that have entered the target hole and remaining pins that have not yet entered the hole. When cleaning the remaining pins, it is necessary to keep the positioned pins in the target hole for subsequent blade alignment and pressing. Needle loading, residual material transfer, and part removal involve different movements, therefore, it is necessary to ensure that adjacent operation stages have a permissible relationship corresponding to the actual component position.

[0004] The technical problem addressed in this application is how to ensure that the opening of the recycling channel is constrained by the actual holding positions of the two locking pin plates in the tooling of the shared magnetic moving component for magnetic pin loading and residual material recycling, and how to prevent the locking pin plates from prematurely exiting the holding position before the recycling channel is blocked again; local contact stroke compensation, structural compactness, and release control after pressing are respectively considered as further technical problems to be addressed. Summary of the Invention

[0005] This application provides a pin assembly fixture, which includes a frame, a positioning component, a magnetic moving component, a locking pin component, and a recycling interlocking component. The positioning component defines the lateral position of the ferromagnetic pin through the through pin positioning hole of the positioning plate with the assembly side facing upward, and defines the axial position of the pin through the pin supporting surface of the lower support component, so that the assembly end of the pin is exposed on the assembly side. The magnetic moving component moves a magnetic component below the support component to guide some of the pins into the hole, and moves the remaining pins that are not inserted into the hole along the waste material recycling path.

[0006] The locking pin assembly has a first locking pin plate and a second locking pin plate that move in opposite directions between a pass position and a hold position. In the pass position, the pass area of ​​the two locking pin plates allows the pin to move along the pin positioning hole. In the hold position, the hold area of ​​the two locking pin plates contacts the pin from opposite sides of the pin and restricts the pin from retracting during residual material recycling. The two locking pin plates are respectively fixedly connected to a first position plate and a second position plate having permission windows.

[0007] The recycling latch of the recycling interlock assembly forms a physical block on the only recycling channel that the magnetic moving part must pass through when entering the waste recycling area. The two latches fixedly connected to the recycling latch can only enter the window when the two locking pin plates reach the holding position and the two permission windows are aligned with the corresponding latches. If either window is not aligned, the corresponding position plate prevents the latch from releasing the physical block. The two latches enter the window before the channel opens and exit the window only after the channel is blocked again, thereby restricting the corresponding locking pin plate from leaving the holding position through the window edge during insertion.

[0008] In a further configuration, the holding area corresponding to each target hole is supported by a local holding unit that can generate elastically compensated displacement relative to the main body of the locking pin plate, so that the difference in the initial contact stroke of different hole positions is absorbed by local retraction; the local holding unit can adopt a thin holding head and a force transmission extension extending along the plate surface, and arrange the local spring outside the hole area. The supporting side of the positioning plate can also be provided with an axial relief cavity to accommodate the hole area holding part, thereby separating the hole area space from the outer peripheral drive space.

[0009] In one embodiment, two enclosed slot cams on a common switching shaft drive the locking pin and the retractable latch respectively. The retractable latch and its driven roller are connected by a bidirectional constrained transmission, rather than the latch being pushed back by a spring alone. The holding section of the locking pin drive cam covers the latch opening and closing stroke, so when the latch is blocked, it cannot continue to enter the locking pin release stage through the elastic free stroke of the latch transmission chain.

[0010] In another embodiment, the two spaced portions of the blade and the retraction stop position of the magnetic moving component control three blocking pins respectively. The three blocking pins together limit the available stroke of the release slide. After the block is released, the manual release component transmits the retraction force to the release pawl through the release slide and the one-way free stroke connector. The release of the block and the application of the release force are undertaken by different components, and the passage position is restored through a clear pull-back and reset structure after the return stroke.

[0011] The magnetic moving part and the lifting magnetic head base respectively undertake the movement within the disk surface and the adjustment movement. The rigid block that is blocked by the latch is fixed to the magnetic moving part that does not move with the magnetic head. The stop trigger key located on the lifting magnetic head base only acts on the moving part return part in the combination of the predetermined plane position and the retraction height, thereby avoiding equating a single plane return with the completion of the adjustment and retraction.

[0012] Under the condition that the pin support end remains in contact, the pin protrusion height H, the total pin length L, and the distance D from the press-fit reference surface to the pin support surface satisfy H=LD; when the mounting hole inlet plane has a directional offset e relative to the press-fit reference surface in the direction of pin protrusion at the termination position, the geometric insertion depth S, which ignores elastic deformation and does not pre-top and bottom, satisfies S=He, and S=H only exists when the inlet plane coincides with the press-fit reference surface at the termination position.

[0013] The aforementioned cross-connection relationship controls whether the retrieval channel can be opened based on the actual positions of the two locking pin plates, and during the opening period, it reversely constrains the position of the locking pin plates. Local compensation, coaxial drive, three-condition release, common reference, and axial compact arrangement can be further configured based on this relationship, without considering all additional configurations as necessary to achieve the cross-connection. Plate position permission does not individually indicate that each target hole has a pin, nor does it individually indicate that the hole-by-hole holding force or interference fit quality is acceptable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a horizontally positioned pin assembly fixture. Figure 2 Including the basic stacking relationship and the compact configuration profile with an axial clearance cavity set on the positioning plate support side; Figure 3 This is a schematic diagram showing the hole position selection to maintain the corresponding relationship of the hole groups in the current product.

[0015] Figure 4 It is a schematic diagram of the local magnetic circuit, the fixed height moving part, the lifting magnetic head seat, and the retraction and docking trigger relationship; Figure 5 This is a schematic diagram of a common benchmark and shared coding state; Figure 6 It is a schematic diagram of the passage, holding, and relative movement direction of the two locking pin plates.

[0016] Figure 7 This includes the partial floating retaining structure, the fit between the thin retaining head and the lateral spring receiving area, and the relationship between the total force limiting transmission and the forced pull-back; Figure 8 It is a schematic diagram of the cross constraint of double windows and double locking tongues, as well as the structure for transferring, pushing and closing the receiving of surplus materials; Figure 9 This is a schematic diagram of three-condition release authorization, active unlocking, and one-way no-travel connection.

[0017] Figure 10 This is a schematic diagram of the coaxial closed cam groove, the reverse drive relationship, and the action stages; Figure 11 This is a schematic diagram showing the relationship between the exposed height of the pin, the offset of the inlet plane, and the axial spatial distribution. Figure 12 This is a schematic diagram of the complete operation cycle of a horizontally upright implementation with local compensation and release interlocks.

[0018] Explanation of reference numerals in the attached figures 10. Positioning plate; 11. Axial clearance cavity; 14. Pin positioning hole; 20. Support component; 21. Pin support surface; 22. Press-fit reference surface; 23. Distance support component; 30. Magnetic moving assembly; 31. Magnetic component; 32. Moving device; 33. Distance adjustment mechanism; 34. Magnetic pole shoe; 35. Magnetic yoke; 36. Magnetic shielding component; 37. Magnetic field passage window; 40. Ferromagnetic pin; 50. Blade; 51. Mounting hole; 52. Blade termination reference surface; 60. Hole position selection component; 61. Hole selection opening; 70. Locking pin assembly; 71. First locking pin plate; 72. Second locking pin plate; 73. Composite locking pin opening; 731. Circular passage area; 732. Shallow V-shaped holding area; 74. Low friction 75. Wiping isolation element; 76. Shared switching shaft; 77. Locking pin drive assembly; 78. Locking pin drive cam; 79. Retrieval latch cam; 70. Torque limiting handle; 71. Restrained driven roller; 72. First drive slider; 73. Second drive slider; 74. Synchronizing gear; 75. First rack; 76. Second rack; 77. First force limiting spring; 77. Second force limiting spring; 78. Pull-back rod; 79. Pull-back shoulder; 70. Maximum stroke stop; 71. Partial holding unit; 79. Floating holding block; 79.11. Thin holding head; 79.12. Force transmission extension; 79.2. Partial compression spring; 79.3. Guide receiving part; 79.4. Partial limiting part; 95. Axial retaining cover; 796. Lateral receiving area; 80. Residual material recovery section; 81. Transition bearing; 82. Material feeding component; 83. Material receiving box; 84. Material receiving box cover; 120. Common reference assembly; 1201. Reference beam; 121. First-step reference post; 122. Second-step reference post; 123. Blade positioning bridge; 1231. Bridge body; 1232. Blade nest; 124. Mechanical coding structure; 1241. Shared coding selection component; 131. Recovery latch; 132. Latch elastic component; 133. Latch linkage component; 134. Release interlock assembly; 1341. Release pawl; 1342. Status locking disc; 1343. First blocking pin; 1344. Second blocking pin ; 1345, Return blocking pin; 1346, Manual release component; 1347, Release slide; 1348, Release reset elastic component; 1349, One-way free travel connector; 1351, First blade positioning component; 1352, Second blade positioning component; 136, Moving component return component; 1371, First position plate; 1372, Second position plate; 1373, First permission window; 1374, Second permission window; 1375, First locking tongue; 1376, Second locking tongue; 140, Frame; 141, Limiting guide rail; 142, Unique recovery channel; 323, Magnetic moving component; 324, Hard stop block; 325, Lifting magnetic head seat; 326, Stop trigger key; 327, Stop guide seat. Detailed Implementation

[0019] The assembly side is the side where the pin is fed and the blade approaches the positioning plate, while the support side is the side where the pin support is located; in this embodiment, the assembly side faces upward. The ferromagnetic pin 40 is a uniform diameter needle-shaped pin capable of being magnetized, and its support end and assembly end are distinguished according to the current usage direction, and it is not required to have stepped ends with different diameters.

[0020] The basic fixture includes a positioning disk 10, a support 20, and a movable magnetic component 31 located below the support 20. The positioning disk 10 has a pin positioning hole 14, and the support 20 has a pin bearing surface 21. After the pin 40 enters the pin positioning hole 14 and abuts against the pin bearing surface 21, the portion of it protruding from the assembly side is used to align with the mounting hole 51 of the blade 50. The operator holds the blade instead of the pin to complete the pressing. This basic configuration is used to illustrate the relationship between the magnetic insertion hole and the height transfer, and does not presume that it has the retrieval and release interlock described later.

[0021] For mounting holes on two opposite end faces of the blade, a single upward-facing pin array is not considered capable of simultaneously entering both mounting holes at one time. In this embodiment, the target hole group for the current press-fit is the hole group corresponding to the mounting holes that are close in the same direction during the same press-fit. The ends with opposite inlet directions are assembled separately after changing the blade orientation. Other holes on the positioning plate can be selected as holes for other specifications or other cycles, and are not necessarily part of the hole group that needs to be pressed-fitted simultaneously in this instance.

[0022] like Figures 1 to 3 As shown, the tooling with locking pin and retraction interlock retains the positioning plate 10, support 20, and lower magnetic component 31 of the basic tooling. Within the stacked frame of the frame 140, a hole selection component 60, positioning plate 10, first locking pin plate 71, low-friction isolator 74, second locking pin plate 72, and support 20 are arranged from the assembly side to the support side. This order indicates the functional order of the components the pin passes through; it is not required that the entire thickness of each component be superimposed without overlap along the pin axis. The two locking pin plates are guided by an outer peripheral linear guide structure, and the pin passage area avoids contact with the fixed support structure.

[0023] The pin positioning hole 14 has a smooth guide inlet and a straight guide section that slides with the pin 40. The hole selection opening 61 of the hole selection component 60 opens the target pin positioning hole for the current operation and blocks other hole positions. The number of hole positions and relative coordinates of the target hole group for the current operation are determined by the blade mounting holes in the same pressing operation. The hole positions required for the same blade cannot be deleted or their hole spacing changed simply to accommodate the retaining mechanism. For multiple independent blade stations, the arrangement spacing between the stations can be changed or assembly cycles can be organized separately without changing the hole position correspondence within each blade.

[0024] like Figure 3As shown, the optional hole array on the positioning disk 10 is not the same as the target hole group that needs to be used simultaneously every time; the target hole group of the same blade maintains its corresponding mounting hole relationship, and the retaining hole groups of the hole position selection component 60, locking pin plates 71 and 72 are configured with the same target hole group as the blade nest block 1232. The selection component only blocks non-target hole positions for the current time, and does not reduce the number of necessary assembly holes for the same blade as a means to compress the space occupied by the mechanism.

[0025] like Figure 2 As shown in the partial cross-section, in the compact configuration, the locating disc 10 forms an axial clearance cavity 11 on the surface facing the support member 20. The straight guide section of the pin locating hole 14 is retained on the assembly side of the axial clearance cavity 11. The thin hole area holding portion of the first locking pin plate 71 is at least partially located within the axial clearance cavity 11. The second locking pin plate 72 is adjacent to the first locking pin plate 71 along the pin axial direction. The thick guide support portion, spring receiving portion and fastening portion of both are arranged on the outer periphery of the hole area. The axial retaining cover 795 is recessed into the corresponding receiving surface at the location that may be opposite to the adjacent fixing structure to avoid intrusion into the required sliding gap.

[0026] The support member 20 is positioned relative to the positioning plate 10 by a spaced support member 23 located outside the pin travel space. The spaced support member 23 abuts against the mounting shoulder of the support member and the reference support of the frame. Its support dimensions define the position of the pin support surface 21 relative to the press-fit reference surface 22. This position can be changed by replacing the spaced support member or adjusting its mating dimensions with the mounting shoulder, but without increasing the total length of the pin to provide axial space for the drive spring or the outer peripheral guide seat.

[0027] by Figure 11 Taking the compact configuration shown as an example, let the effective axial thickness of the hole selection component 60 be t_s, the thickness of the positioning plate 10 from its assembly side to the unopened support side surface be t_d, the depth of the axial clearance cavity 11 be r, the effective thicknesses of the two locking pin plates in the pin passage neighborhood be t_1 and t_2 respectively, the effective thickness of the low-friction isolator 74 be t_f, and the sum of the remaining necessary clearances in the axial passage where the pin is located and the actual thickness of the cover plate extending into the passage be g. Then, the minimum required axial occupancy D_req = t_s + (t_d - r) + t_1 + t_f + t_2 + g; D, determined by the spacer support 23, satisfies D_req ≤ D = LH, and the remaining guide length t_d - r satisfies the pin guiding requirements. The outer peripheral spring and the support portion that does not intrude into the axial passage are not counted again in D_req; the portion sunk into the cavity is also not counted again beyond the thickness of the positioning plate.

[0028] like Figure 5As shown, the reference beam 1201 of the common reference assembly 120 is fixed to the frame 140. The corresponding positioning section of the first step reference column 121 restricts the position of the positioned component in the reference plane. The unloading positioning section of the second step reference column 122 restricts the rotation around the first reference column and retains error release along the line connecting the two reference columns. The positioning disk 10, the hole selection component 60 and the blade positioning bridge 123 respectively contact their own positioning sections and axial support surfaces, so that the positioning of the three types of components is not transmitted step by step through other replacement components.

[0029] The blade positioning bridge 123 includes a bridge body 1231 and a detachable blade nest block 1232. The blade nest block 1232 is used to position the blade tip for the current operation and retain the pressing and removal passage. During magnetic feeding and residual material cleaning, the blade positioning bridge 123 is removed. After the residual material is recovered and the magnetic head retracts and stops, it is directly installed on the reference beam 1201. After the positioning bridge is installed, the two blade positioning components cooperate with the corresponding transmission components on the frame through axial docking push rods. When the docking is disengaged, the frame-side blocking pins return to the blocking position by their respective elastic components, and the positioning permission is maintained without relying on the disengagement of the connection.

[0030] In the selected configuration with paired coding, the reference beam 1201 is equipped with a shared coding selection element 1241 that can move along the guide groove and is fixed to the position of specification A or specification B by a locating pin. The shared coding selection element 1241 has two coding fingers that act on the hole selection element 60 and the blade nest block 1232 respectively. The two fingers change position with the same rigid body. The mechanical coding structure 124 of the correct specification change part is a clearance groove for the corresponding fingers to pass through. The solid part of the incorrect specification change part is blocked by the fingers and cannot contact the axial support surface. To change specifications, both change parts must be removed first and then the shared coding selection element is switched. The coding is not switched by adjusting the precision reference column.

[0031] like Figure 4 As shown, the magnetic moving component 323 of the magnetic moving assembly 30 moves along two intersecting directions within the disk surface via the moving device 32. The rigid block 324 is fixed to the magnetic moving component 323 and maintains a constant height relationship with it. The lifting magnetic head base 325 is driven to rise and fall relative to the magnetic moving component 323 by the adjusting mechanism 33. The magnetic component 31, the magnetic pole shoe 34, and the magnetic yoke 35 are installed on the lifting magnetic head base 325, so that the magnetic head adjusting does not cause the rigid block 324 to rise or fall and bypass the recovery latch 131.

[0032] Magnetic component 31 and magnetic pole shoe 34 are magnetically connected via magnetic yoke 35. Magnetic shield 36 can be installed on the side and back without bridging the working output port facing the pin. In the effective magnetic field area, hole selection component 60, positioning plate 10, two locking pin plates, and support component 20 all utilize non-ferromagnetic or low-permeability areas through which the magnetic field can pass, collectively forming a magnetic field passage window 37. Frame fasteners, guide rails, local springs, and permissible structures are preferably arranged outside the working window; if this is unavoidable, their magnetic influence must be taken into account during selection and adjustment.

[0033] When the magnetic component 31 approaches the support component 20 and scans along the target hole area, the scattered pins can undergo positional changes such as sliding, rolling, flipping, or tip lifting. Among these, the pins whose ends correspond to the target hole enter the positioning hole and abut against the support surface. This embodiment does not require all pins to necessarily repel each other and be simultaneously vertical as the needle loading mechanism, nor does it require a single scan to necessarily fill the hole as the termination condition for the action. Before locking the needle, check whether there are pins in the target hole and whether their support ends are in place. If there are empty holes, oblique needles, or inconsistent heights, eliminate the abnormalities first.

[0034] The frame 140 has a predetermined planar docking position P0 and a docking guide seat 327 outside the working area. The docking trigger key 326 is fixed to the lifting head seat 325. The docking guide seat 327 has an inlet that mates with the docking trigger key 326 at the retraction height and a fixed guide wall. The driven part of the moving part return member 136 is located in the inlet, so that the docking trigger key 326 enters and presses the driven part only when the planar position enters the allowable mating range of P0 and the lifting head seat 325 is at the retraction height. When the lifting head seat is at the working height, the trigger key is offset from the driven part and is limited by the inlet, so it does not generate the same return permission.

[0035] The retraction and docking state is a defined geometric state, not a result of magnetic field strength testing. The retraction distance and docking position should be selected according to the actual magnetic components, window stacking, and pin specifications to ensure that the resistance to component removal and the disturbance to unremoved pins are within the allowable range of the selected working conditions. After the remaining material is recovered, this docking state should be established first, followed by blade pressing and unlocking of the locking pins, without following the sequence of "unlocking first and then demagnetizing".

[0036] The retaining areas of the two locking pin plates are used to contact and restrict the inserted pins, while the position plate and permitting window are used to translate the actual position of the plate body into a physical permit for the movement of the latch. They perform different functions. For configurations matching predetermined pin specifications and hole groups, the retaining area can be formed by the fixed retaining portion on the locking pin plate. When it is necessary to accommodate different hole contact travel differences, the following hole-by-hole elastic compensation configuration is used, and the hole-by-hole clamping force is the same regardless of whether the two plates are aligned, whether in a fixed or floating retaining configuration.

[0037] like Figure 6 and Figure 7As shown, in the configuration with per-hole compensation, the target hole position of each locking pin plate corresponds to a local holding unit 79. The local holding unit 79 includes a floating holding block 791, a local compression spring 792, a local limiting part 794, and an axial holding cover 795 within the guide receiving part 793. The composite locking pin opening 73 in the floating holding block 791 includes a circular passage area 731 and a continuously connected shallow V-shaped holding area 732. The axial holding cover 795 spans the holding edge of the guide receiving part 793 and avoids the pin passage space.

[0038] The shallow V-shape of the first locking pin plate 71 narrows to the far left end from the circular passage area. When the first locking pin plate 71 moves to the right, the pin axis moves to the left into the narrowing area relative to the first locking pin plate 71 and its floating retaining block 791. The structure of the second locking pin plate 72 and its floating retaining block is mirrored with the former. When the second locking pin plate 72 moves to the left, the pin moves to the right into another retaining area relative to the second locking pin plate 72. Figure 6 Used to express the direction of motion Figure 7 The local floating structure further adapts to the difference in contact stroke between the holes.

[0039] Taking the first locking pin plate 71 as an example, a partial compression spring 792 is disposed on the side where the floating retaining block 791 retracts relative to the pin's reaction force, and pushes the floating retaining block 791 to the unloaded reset position defined by the partial limiting part 794; after the floating retaining block 791 contacts the pin, the locking pin plate body continues to move to the right, the floating retaining block 791 retracts to the left relative to the body and compresses the partial compression spring 792, and the other floating retaining blocks that have not yet been contacted continue to move with the plate body. The spring direction, retraction direction and limiting direction mentioned above are mirrored in the second locking pin plate 72.

[0040] The reset position of each local holding unit enables the circular passage area 731 to communicate with the corresponding pin positioning hole 14 when the plate is in the passage position. The guide receiving part 793 restricts the rotation of the floating holding block, and the local limiting part 794 limits its no-load reset position and maximum compensation stroke. The local spring and axial holding cover can be detachably installed. The hole area of ​​the floating holding block and the spring receiving part can be located in the same local receiving part, or a separate structure extending along the plate surface as described later can be adopted.

[0041] exist Figure 7In the compact configuration, the floating retaining block 791 has a thin retaining head 7911 and a force-transmitting extension 7912 integrally formed with or rigidly positioned connected thereto. The thin retaining head 7911 forms a circular passage area 731 and a shallow V-shaped retaining area 732. The force-transmitting extension 7912 extends outward from the hole area to the lateral receiving area 796 along the movement direction of the corresponding locking pin plate. A partial compression spring 792 is disposed in the lateral receiving area 796 and is compressed by the relative linear retraction of the force-transmitting extension 7912 when the thin retaining head 7911 is subjected to the reaction force of the pin. This allows for independent compensation per hole without arranging a complete spring sleeve between adjacent holes.

[0042] The guide receiving portion 793 is provided with guide contact portions spaced back and forth along the force transmission extension portion 7912 to restrict the rotation of the extension portion relative to the plate body. The axial holding cover 795 crosses over the outside of the guide contact portion to avoid the movement envelope of the pin and the extension portion. Each force transmission extension portion is led to the outside of the hole area in its corresponding plate layer with a non-intersecting channel. The positions of each local spring can be staggered along the length of the channel. The extension direction and the position of the compression spring in the two locking pin plates are mirror images of each other.

[0043] right Figure 7 The adjacent retaining heads arranged perpendicular to the direction of movement of the extension are shown. Let their center distance be p, the maximum width of the retaining head in this direction be w, the guide clearance on each side be c, and the width of the plate connection reserved between two adjacent guide channels be b. Then p ≥ w + 2c + b. Alternating clearance spaces are also reserved along the direction of movement for the plate body stroke and the local compensation stroke. This relationship limits the hole area to the thin retaining head, guide clearance, and connection, excluding the spring outline that has already moved to the lateral receiving area. For non-parallel hole arrays, the condition is that the complete motion envelopes of each retaining head and extension do not interfere with each other, rather than extending the parallel hole array relationship to allow for the arrangement of any hole array.

[0044] Let c_i be the plate displacement corresponding to the contact pin of the i-th local holding unit starting from its no-load reset state, q_H be the displacement corresponding to the plate body holding position, and the effective elastic compensation interval be [u_min,i, u_max,i]. Then, each target hole satisfies u_min,i ≤ q_H - c_i ≤ u_max,i. By changing the reset stop or spring preset position of each unit, the interval [c_i + u_min,i, c_i + u_max,i] has a common intersection, and q_H is selected within this intersection. The adjustment does not change the number or relative position of the blade mounting holes, nor does it replace local compensation matching with increasing the total driving force.

[0045] The first driving slider 761 and the second driving slider 762 transmit the total driving force to the two locking pin plates through the first force limiting spring 771 and the second force limiting spring 772 respectively. The maximum stroke stop 78 limits the overall holding end point of the plate body. The remaining compression of the total force limiting spring is used to absorb the driving stroke after the plate body is in place. It cannot replace the local spring 792, nor can it be used as proof that the holding force of each hole is equal or that each hole has a pin.

[0046] Each locking pin plate is fixedly connected to a pull-back rod 773. The pull-back rod 773 passes through the corresponding drive slider and has an end seat in front of the drive slider to bear the corresponding total force limiting spring. A pull-back shoulder 774 is located on the return side of the drive slider. When the drive slider moves forward, it compresses the total force limiting spring located between itself and the end seat, pulling the locking pin plate. When the drive slider returns, it first unloads the spring, and then, after eliminating the predetermined interval, it abuts against the pull-back shoulder 774, thereby pulling the plate body back to the passing position via the pull-back rod 773. At the end of the return stroke, the floating holding blocks return to the unloaded reset position under the action of their respective local springs.

[0047] A low-friction isolator 74 and necessary axial clearance are maintained between the two working surfaces of the plates, and the straight guide section of the pin positioning hole 14 undertakes lateral guidance; the action of the two plates on opposite sides is not described as completely eliminating bending, and the axial working surface spacing, local contact profile and holding force should simultaneously limit the bending moment, indentation and removal friction on the pin.

[0048] like Figure 8 As shown, the first position plate 1371 and the second position plate 1372 move with the first locking pin plate 71 and the second locking pin plate 72 through an integrally formed or fixed connection with a positioning key. The first permission window 1373 and the second permission window 1374 are formed on the two position plates respectively. The first latch 1375 and the second latch 1376 are fixed to the same rigid connecting frame of the retraction latch 131. The two latches move with the retraction latch 131 along the opening direction and cooperate with the corresponding permission window at different axial levels.

[0049] When the two locking pin plates have not yet reached their respective holding positions, at least one permission window is misaligned with the corresponding bolt, and the end of the bolt will abut against the position plate solid area, so the retractable latch 131 cannot complete the stroke of exiting the unique retractable channel 142; when the two plate bodies reach the position defined by the maximum stroke stop 78 and both permission windows are aligned with the bolt, the two bolts enter their respective windows, and then the bolt blocking part exits from the passage envelope of the magnetic moving member 323 and the rigid stop 324.

[0050] The above relationship is described using the unlatching displacement b of the retracting bolt. Let the displacement corresponding to the latch bolt starting to form an insertion amount sufficient to restrict the retraction of the plate main body be b_E, and the displacement at which the bolt blocking portion just completely avoids the passage envelope of the moving member be b_C. The structure is configured such that b_E < b_C, and a positive overlapping interval is reserved after accounting for fitting clearances. During the latching return stroke, the two latch bolts exit the corresponding windows only after the bolt re-enters the passage envelope, so that the lock pin plate cannot retract to the passage position in advance while the retraction channel is still fully open.

[0051] The alignment of the permission window indicates that the plate main body has actually entered the defined position interval, rather than directly measuring the contact force of the floating retaining block. The plate displacement backlash allowed by the window width and the latch bolt thickness shall be less than the allowable remaining preload stroke of the most unfavorable local retaining unit, and the lower limit relationship of local compensation shall continue to be satisfied after entering the window. Empty holes, local spring breakage or jamming of local retaining blocks still need to be excluded via pin assembly inspection and component inspection, and it is not claimed that all such faults have been detected simply by the alignment of the window.

[0052] The two limit guide rails 141 and the fixed enclosures on their inlet side form the only retraction channel 142 for the magnetic moving member 323 to enter the scrap recovery area from the working area, and the guide rail inlet is located outside the distance adjustment range of the lifting magnetic head seat 325. The bolt 131 takes the hard stop block 324 at a fixed height as the blocking object. The guide rails and the enclosures jointly prevent the magnetic moving member from bypassing the bolt from the lateral direction or the height direction, and the said only retraction channel does not mean that the material can only pass through the same physical orifice.

[0053] As Figure 10 shown, the lock pin driving cam 751, the retracting bolt cam 752 and the state locking disc 1342 are mounted on the common switching shaft 75. The common switching shaft 75 rotates reciprocally between the passage indexing position and the retaining indexing position, and receives input from the torque-limiting handle 753 with a torque-limiting structure. Both cams are provided with closed cam grooves for accommodating the constrained driven rollers 754, so as to transmit motion to the corresponding driven members in the forward stroke and the return stroke respectively.

[0054] The driven member of the lock pin driving cam 751 drives the first driving slider 761. The first rack 765 of the first driving slider 761 meshes with the synchronizing gear 764, and the second rack 766 of the second driving slider 762 meshes with the other side of the synchronizing gear 764, so that the two driving sliders move in opposite directions with equal strokes. The final local contact difference between the two plates is accommodated by the local retaining units 79 and their respective total force-limiting springs, rather than being resolved by disengaging the racks from the gear.

[0055] The driven roller 754 of the latch cam 752 is connected to the latch 131 via the guide driven rod and the latch linkage 133. The connecting pin and the guide structure transmit motion in both the opening and closing directions. The latch elastic element 132 only provides auxiliary bias to the blocking position. The latch linkage 133 is not equipped with a compression spring that can continue to swallow the subsequent opening and closing cam stroke when the latch is blocked. The installation gap is included in the phase margin and the insertion overlap range check.

[0056] The common switching axis passes sequentially through the locking pin advance section, the interval section where the locking pin is held and the latch is still closed, the latch opening section, and the holding indexing section in the forward direction; and sequentially through the latch closing section, the interval section where the latch is closed and the locking pin is still held, and the locking pin pull-back section in the return direction. Figure 10 The normalized phase expression is given. The specific cam angle, groove width, roller diameter, pressure angle and contact strength are determined by the mechanism dimensions. The curve shown in the figure is not used as the machining cam profile.

[0057] When one of the two plates is not in position and the latch is blocked, the forward movement of the latch is prevented by the position plate, and the bidirectional connection prevents the common switching shaft from exceeding the corresponding latch opening stroke. When the latch return stroke is blocked, the closing cam groove and the bidirectional connection stop the common switching shaft in the lock pin holding section. The torque limiter handle setting should be higher than the torque required for normal operation and lower than the damage threshold of the position plate, latch, latch linkage, rollers, and supports. This embodiment does not include overload damage or connector breakage in the conclusion of unconditional mechanical error prevention.

[0058] like Figure 8 As shown in the unloading section, the residual material recovery section 80 includes a transition support 81, a material feeding member 82, a receiving box 83, and a receiving box cover 84. The transition support 81 is formed of a non-ferromagnetic material and extends continuously from the pin bearing surface of the hole selection member 60 to the unloading edge outside the effective target hole group. The outer perimeter of the disc forms a notch at this location that connects with the transition support, without requiring the pin to cross the raised frame without a transition.

[0059] After both plates are held and the recovery latch 131 is open, the magnetic moving part 323 moves along the single recovery channel 142, causing the local magnetic action area to bring the remaining pins to the end of the transition support 81; the lifting magnetic head seat 325 then retracts to the yielding height, and the operator pushes the material-pushing part 82 along the outer guide groove of the end to push the remaining pins past the unloading edge into the receiving box 83. The sweeping range of the material-pushing part 82 does not extend to the target hole area where the already inserted pins are located.

[0060] After the material transfer is completed, check that there are no loose pins remaining in the transition support 81 and the target area that could interfere with the pressing process. Close the receiving box cover 84, and then return the magnetic moving part 323 to the docking position with the magnetic head retracted. The closed box cover prevents the recovered pins from returning to the working area along the original transition surface. This implementation method explicitly uses manual assistance for material transfer and box sealing, and does not describe moving the material to the recycling area or reducing the magnetic effect itself as automatically and completely removing the remaining material.

[0061] like Figure 9 As shown, the state locking disc 1342 has a locking notch at the corresponding holding index position. The release pawl 1341 enters the locking notch through its biased elastic element and engages with the anti-rotation shoulder surface of the notch in the return direction to prevent the common switching shaft 75 from starting the return without permission. The side of the state locking disc facing the holding index position has an inlet ramp, which allows the release pawl to be partially lifted before falling into the notch before reaching the locking notch.

[0062] The release slide 1347 moves along the frame guide and is provided with blocking parts that respectively cooperate with the first blocking pin 1343, the second blocking pin 1344, and the return blocking pin 1345. The three blocking pins are respectively moved to the blocking position by the elastic member and are respectively retracted by the first blade positioning member 1351, the second blade positioning member 1352, and the moving member return member 136 via the push rod and the steering rocker arm. When any blocking pin is not retracted, its physical contact restricts the release slide 1347 from completing the release stroke.

[0063] The first blade positioning member 1351 and the second blade positioning member 1352 are installed on the blade positioning bridge 123, corresponding to the two interval detection positions at the end of the blade, and are pushed when the blade reaches the press-fit termination position along the nest block defined path; the third condition is established by the stop trigger key 326 pushing the moving member return member 136 at a combination position of a predetermined plane position and a predetermined retraction height, and is no longer established solely by the plane position of the needle loading start point.

[0064] The manual release component 1346, serving as the release input, is a lever mounted on the frame via a fulcrum. Its output drives the release slide 1347 through a pin joint. The release slide 1347 engages with the transmission part of the release pawl 1341 via a one-way free-travel connector 1349. The movement in the manual release direction first eliminates the connection gap, and then the shoulder abuts against the release pawl to apply force, causing it to disengage from the locking notch. The disengagement of the three blocking pins provides permission for movement, and the manual release component provides the force to complete the disengagement. Together, they complete the active release.

[0065] The one-way free-travel connector 1349 includes an elongated hole that allows partial movement of the pawl drive pin relative to the release slide and a shoulder surface that abuts only in the active release direction, so that when the locking disc lifts the pawl in the forward-facing guide ramp, the release slide, which is restricted by the blocking pin, does not need to move synchronously; the elongated hole does not form a force transmission path that bypasses the three blocking pins during active return release. The release reset elastic element 1348 causes the release slide to move toward its blocking reset position, and the pawl itself biases the elastic element to move toward the locking disc.

[0066] When the three permitted states are established, the operator operates the manual release mechanism 1346, keeping the blade in the terminated position, and rotates the common switching shaft 75 in the return direction, so that the locking notch passes the pawl before releasing the manual release mechanism. The unlocked contour of the state locking disc engages with the one-way free-travel connector, allowing the release slide to reset while the pawl moves with the disc edge. The latch closes first, and the locking pin plate is then pulled back to the pass position. The blade is removed only after the common switching shaft reaches the pass indexing position, and the blade's departure allows the two blade blocking pins to re-enter the blocking part of the release slide.

[0067] Before starting the next cycle, check that the manual release mechanism, release slide, and pawl bias structure have been reset, and that the return stop pin has resumed its blocking function when the magnetic head is moved out of the docking position. This embodiment specifies the above operation and inspection sequence, but does not extend it to a safety certification for complete misoperation caused by continuously pulling the release handle, removing the stop pin, or intentionally damaging the connector. The two blade inspection points cannot replace the hole-by-hole needle inspection or the quality inspection of the interference fit.

[0068] like Figure 11 As shown, the press-fit reference surface 22 is formed by the hole position selection member 60 or a support surface with a fixed axial relationship to it, and the supporting end of the pin 40 is kept against the pin supporting surface 21; with the press-fit reference surface 22 as the axial zero position, the direction of the exposed pin is the positive direction, the pin supporting surface 21 is located at -D, and the pin assembly end is located at H=LD.

[0069] When the blade termination reference surface 52 of the blade 50 reaches the press-fit termination position, the directional offset of the inlet plane of the mounting hole 51 along the positive direction is e. Then the geometric depth of the pin entering the mounting hole from the inlet plane is S=He. This relationship is based on the condition that the pin support end has not left the support surface, the pin has not abutted the bottom of the mounting hole or the internal stop in advance, and elastic deformation is ignored. The blind hole must also have an axial allowance that allows press-fitting to the termination position.

[0070] In a configuration where the inlet plane and the press-fit reference plane 22 coincide at the termination position, e=0, therefore S=H; an exemplary design specification uses H=S=3.2 mm and D=L-3.2 mm, with two pairings of the nominal pin diameter and the outer diameter of the positioning plate being 1.2 mm and 250 mm, and 1.5 mm and 200 mm, respectively. The above single-point specifications do not limit the total pin length tolerance, hole clearance, plate thickness, target hole spacing, spring stiffness, or interference fit.

[0071] After the mounting hole and pin form an interference fit suitable for part removal, the magnetic head has retracted and stopped, and both plates have returned to the passable position, the blade 50 is moved away from the positioning plate 10. The blade carries the pin 40 out of the positioning hole 14 through its mounting hole 51. Before removing the part, check that the locking pin plate has actually resumed passage; do not replace this check with unloading by the force-limiting spring. If the part removal resistance is abnormal, stop and check for non-returning retaining blocks, bent pins, or residual magnetic force, rather than forcibly removing the part by continuing to increase manual force.

[0072] like Figure 12 As shown, at the start of the cycle, the common switching shaft 75 is in the pass indexing position, the two locking pin plates and each floating holding block are reset, the retraction latch 131 is in the blocking position, the blade positioning bridge 123 is removed, and the release slide 1347 is in the blocking reset position; after confirming that the current hole position selector, locking pin plate hole group and blade nest block are matched, the pin is supplied to the assembly side, and the local magnetic action area is driven to scan the target hole group.

[0073] After completing the inspection of the presence and support of the target hole pins, the common switching shaft 75 is rotated in the forward direction. The two locking pin plates establish a holding position through local elastic compensation and reach the plate body holding position. The two permission windows are aligned with the corresponding locking tongues, and the latch continues to open. The magnetic moving part 323 transfers the remaining material to the end of the transition bearing part 81 through the controlled channel, completes the magnetic head retraction, active material feeding and material receiving box closing, and then returns to the predetermined retraction and docking state.

[0074] Install the blade positioning bridge 123 and press it onto the end of the blade to make the two blade positioning parts in place. When the third stopping condition is met, actively operate the release part; keep the blade in the termination position, rotate the common switching shaft 75 during the return stroke, the latch first physically closes, the locking tongue then exits the permission window, and the two locking pin plates return to the passage position via the pull rod 773 and the pull shoulder 774. Finally, remove the blade carrying the pin and restore the release block.

[0075] When a single locking pin plate fails to reach its designated position, the position plate and the corresponding locking tongue blocking channel open; when the latch return is obstructed, the closed cam groove and bidirectional latch connection prevent the switching shaft from entering the locking pin pull-back section; when a single blade fails to reach its designated position or the magnetic head fails to stop at the specified plane position and clearance height, the corresponding blocking pin limits the active release stroke. These results are all based on the premise of complete connection, effective guidance, and input torque not exceeding the structural bearing capacity. They do not replace checks for localized jamming, spring damage, voids, and insufficient interference.

[0076] This embodiment specifically describes the horizontal upright arrangement. The actual positional constraints between the two position plates, the two latches, and the retractable latch can be matched with different locking pin drive forms. The local compensation, coaxial closed slot drive, three-condition release, direct common reference, and fixed height structure can be adopted respectively when their corresponding connection and movement conditions are preserved and do not conflict with each other. This article does not unconditionally extend the horizontal upright cycle to inverted pin suction or vertical feeding, nor does it replace the assembly quality judgment of each pin with position permission.

Claims

1. A pin assembly fixture for assembling ferromagnetic pins into mounting holes on blades, characterized in that, include: A frame and positioning assembly, the positioning assembly including a positioning disk with the assembly side facing upward and a support member located below the positioning disk, the positioning disk having a plurality of through pin positioning holes, the support member having a pin support surface opposite to the pin positioning holes, so that a ferromagnetic pin entering the pin positioning hole abuts against the pin support surface and has an assembly end exposed on the assembly side. A magnetic moving assembly includes a magnetic component located below the support, a magnetic moving component carrying the magnetic component, and a moving device. The moving device is configured to drive the magnetic moving component to move the magnetic action area formed by the magnetic component relative to the positioning disk, so as to guide a portion of the ferromagnetic pins into the pin positioning hole and move the remaining ferromagnetic pins that are not inserted into the hole to the waste material recycling area along the waste material recycling path. The locking pin assembly includes a first locking pin plate, a second locking pin plate, and a locking pin drive assembly, wherein the locking pin drive assembly is configured to drive the two locking pin plates to move between a pass position that allows the ferromagnetic pin to enter the pin positioning hole and a holding position that restricts the ferromagnetic pin that has entered the target pin positioning hole from exiting. as well as The recycling interlock assembly includes a recycling latch, a first position plate and a second position plate respectively fixedly connected to the two locking pin plates and respectively having permission windows, and a first latch and a second latch fixedly connected to the recycling latch. The recycling latch is movable between a blocking state that forms a physical block on the movement of the magnetic moving member toward the waste material recycling area and an open state that releases the physical block. When the two locking pin plates reach the holding position, the two permission windows form an alignment relationship with the corresponding locking tongue, allowing the retractable latch to move to the open state. If either permission window is not aligned, the corresponding position plate restricts the retractable latch from moving to the open state by blocking the corresponding locking tongue. Furthermore, during the period when the retractable latch releases the physical obstruction, the two locking tongues and the corresponding permission windows remain engaged to restrict the corresponding locking pin plate from leaving the holding position.

2. The pin assembly fixture according to claim 1, characterized in that, The two locking pin plates each have a passage area and a holding area corresponding to a target pin positioning hole among the plurality of pin positioning holes. The locking pin drive assembly is configured to drive the two locking pin plates to move in opposite directions between the passage position and the holding position. In the passage position, the passage area allows the ferromagnetic pin to move along the pin positioning hole. In the holding position, the two holding areas contact the ferromagnetic pin from opposite sides to restrict the ferromagnetic pin from exiting the pin positioning hole during residual material recycling.

3. The pin assembly fixture according to claim 1 or 2, characterized in that, The frame defines a recycling channel through which the magnetic moving part passes when it enters the waste recycling area from the working area. The recycling latch can extend into or exit the recycling channel. After the two locking pin plates reach the holding position, the two locking tongues enter the corresponding two permission windows before the recycling latch releases its physical obstruction of the magnetic moving part, and exit the corresponding two permission windows after the recycling latch re-establishes the physical obstruction. During the insertion of the two locking tongues into the two permission windows, the locking pin plates are restricted from leaving the holding position by cooperating with the edges of the permission windows.

4. The pin assembly fixture according to claim 2, characterized in that, Each of the locking pin plates is provided with a local holding unit corresponding to a plurality of target pin positioning holes. Each local holding unit carries the corresponding passage area and the holding area, and can generate elastic compensation displacement relative to the main body of the corresponding locking pin plate along the moving direction of the locking pin plate, so that the local holding unit that first contacts the ferromagnetic pin retracts relative to the continuing moving plate body, while other local holding units continue to approach the corresponding ferromagnetic pin. The local holding unit includes a floating holding block linearly guided by a guide receiving portion, a local compression spring disposed between the floating holding block and the plate body, a local limiting portion and an axial holding cover. The floating holding block includes a thin holding head having the passage area and the holding area, and a force transmission extension extending from the thin holding head along the direction of the elastic compensation displacement. The force transmission extension extends to a lateral receiving area outside the hole area where the target pin positioning hole is located. The local compression spring is received in the lateral receiving area and applies a reset bias force to the thin holding head through the force transmission extension.

5. The pin assembly fixture according to claim 4, characterized in that, The passage area is a circular passage area with a diameter larger than that of the ferromagnetic pin. The holding area is a shallow V-shaped holding area that communicates with the circular passage area and gradually narrows in the direction from the circular passage area toward its distal end. The shallow V-shaped holding areas of the two locking pin plates are mirror images of the axis of the ferromagnetic pin, so that the movement of each locking pin plate toward the holding position causes the ferromagnetic pin to move relative to the locking pin plate toward the distal end of the corresponding holding area. A low-friction isolation member is provided between the two locking pin plates.

6. The pin assembly fixture according to claim 4, characterized in that, The locking pin drive assembly includes a first drive slider, a second drive slider, and a first force-limiting spring and a second force-limiting spring that transmit the total driving force between the corresponding drive slider and the corresponding locking pin plate, respectively. Each locking pin plate is fixedly connected to a pull-back rod. The pull-back rod passes through the corresponding drive slider and has a pull-back shoulder that is spaced apart from the drive slider, so that the corresponding drive slider drives the locking pin plate through the corresponding force-limiting spring during the forward stroke, and unloads the corresponding force-limiting spring and eliminates the gap during the return stroke, and drives the locking pin plate back to the passage position through the pull-back shoulder; the frame is provided with a maximum stroke stop that limits the overall position of each locking pin plate.

7. The pin assembly fixture according to claim 1, characterized in that, The locking pin drive assembly includes a common switching shaft and a locking pin drive cam disposed on the common switching shaft. The retraction interlock assembly also includes a retraction latch cam disposed on the common switching shaft. The two cams respectively have closed cam grooves that constrain the forward and return strokes of the corresponding driven rollers. The retraction latch is connected to the driven rollers of the retraction latch cam via a latch linkage to form a bidirectional transmission connection. The holding section of the locking pin drive cam covers the opening stroke and closing return stroke of the retraction latch, so that after the retraction latch restores the physical obstruction, the two locking pin plates enter the stroke to return to the passage position.

8. The pin assembly fixture according to claim 7, characterized in that, The common switching shaft accepts manual input via a torque limiting handle. The latch linkage does not have an elastic free stroke between its driven roller and the retractable latch to overcome the latch opening or closing block. The locking pin drive assembly also includes a first drive slider and a second drive slider. The two drive sliders have a first rack and a second rack that mesh with the same synchronous gear. The two racks are located on opposite sides of the synchronous gear to convert the output of the locking pin drive cam into the opposite motion of the two drive sliders.

9. The pin assembly fixture according to claim 7, characterized in that, It also includes a release interlock assembly, which includes a state locking disc connected to the common switching shaft, a release pawl that can enter the locking notch of the state locking disc to prevent the common switching shaft from returning from the indexing position, a release slide connected to the release pawl, a release input that provides a release force to the release slide, and a first blocking pin, a second blocking pin, and a return blocking pin that respectively limit the release stroke of the release slide. The first blocking pin and the second blocking pin are controlled by a first blade positioning member and a second blade positioning member driven by two spaced portions of the blade, respectively. The return blocking pin is controlled by a moving member return member that indicates that the magnetic moving component is in a predetermined retraction stop state, and all three blocking pins avoid the release stroke of the release slide only when both blade positioning members and the moving member return member are in position.

10. The pin assembly fixture according to claim 9, characterized in that, The release input is a manual release component. The release interlock assembly also includes a release reset elastic element that causes the release slide to move toward the blocking reset position. The release slide is connected to the release pawl via a one-way free-travel connector. When the release slide moves in the release direction, the one-way free-travel connector abuts against the transmission part of the release pawl to transmit the force to exit the locking notch. When the state locking disc drives the release pawl past the guide ramp in the positive direction, it allows the release pawl to move relative to the release slide that is held in the reset position. The locking notch has an anti-rotation shoulder surface that cooperates with the release pawl in the return direction.

11. The pin assembly fixture according to claim 9, characterized in that, The magnetic moving component moves along the inward direction of the positioning disk. The magnetic component is mounted on a lifting magnetic head seat that moves relative to the magnetic moving component in the adjustment direction. The magnetic moving component has a rigid stop block that maintains a fixed height relationship with it and is blocked by the retraction latch. The lifting magnetic head seat is provided with a stop trigger key. The frame is provided with a stop guide seat and the moving component return component at a predetermined plane stop position. The stop trigger key only enters the trigger position in the stop guide seat when the magnetic moving component enters the predetermined plane stop position and the lifting magnetic head seat is at a predetermined retraction height, so as to drive the moving component return component.

12. The pin assembly fixture according to claim 1, characterized in that, It also includes a common reference assembly, a hole selection component, and a detachable blade positioning bridge. The common reference assembly includes a reference beam, a first-step reference column with a cylindrical positioning section, and a second-step reference column with a unidirectional unloading positioning section. The positioning disk, the hole selection component, and the blade positioning bridge directly mate with the corresponding positioning sections and axial support portions of the two reference columns, respectively. The hole selection component opens the target pin positioning hole required for the current press fitting and blocks non-target pin positioning holes. The blade positioning bridge has a blade nest block for positioning the blade end and aligning its mounting hole with the target pin positioning hole. The hole selection component and the blade nest block are each equipped with a mechanical coding structure. The reference beam is equipped with a shared coding selection component that can switch and position between different specification positions. The shared coding selection component simultaneously limits the allowed coding of the hole selection component and the allowed coding of the blade nest block at each specification position, so that the hole selection component or the blade nest block that does not match the current specification position cannot reach the corresponding axial support portion. The mechanical coding structure does not undertake the precise position transfer between the target pin positioning hole and the mounting hole.

13. The pin assembly fixture according to claim 1, characterized in that, The magnetic moving assembly also includes a magnetic pole shoe and a magnetic yoke that are magnetically connected to the magnetic component. The positioning disk, the two locking pin plates, and the support component together form a low magnetic permeability or non-ferromagnetic magnetic field through the window within the corresponding local magnetic action area. The moving device includes a first moving mechanism and a second moving mechanism that move the magnetic pole shoe along two intersecting directions within the disk surface, and an adjustment mechanism that moves the magnetic pole shoe away from or towards the pin support surface.

14. The pin assembly fixture according to claim 1, characterized in that, The waste material recycling area is provided with a transition support that is continuously connected to the pin bearing surface on the assembly side, a receiving box located at the end of the transition support, a material pusher for pushing the remaining ferromagnetic pins transferred to the end of the transition support into the receiving box, and a receiving box cover that can close the receiving box. The working stroke of the material pusher is outside the distribution area of ​​the target pin positioning holes.

15. The pin assembly fixture according to claim 1, characterized in that, The positioning component has a press-fit reference surface, and the axial distance D between the pin support surface and the press-fit reference surface is set such that the ferromagnetic pin with a total length of L and abutting the pin support surface has an exposed height H=LD; the press-fit reference surface defines the press-fit termination position of the blade, and when the blade reaches the press-fit termination position, the inlet plane of the mounting hole coincides with the press-fit reference surface, so as to form an axial insertion depth equal to the exposed height H without the ferromagnetic pin abutting the bottom of the mounting hole or the stop structure inside the hole in advance.

16. The pin assembly fixture according to claim 15, characterized in that, The axial clearance cavity is formed on the supporting side of the positioning plate. The straight guide section of the pin positioning hole is located on the assembly side of the axial clearance cavity. At least one of the two locking pin plates has its hole area holding portion at least partially accommodated in the axial clearance cavity. The guide support portion of the two locking pin plates is disposed on the outer periphery of the hole area holding portion. The support member is positioned relative to the positioning plate by a fixed-distance support member located outside the pin passage space, so that the axial distance D between the pin support surface and the pressing reference surface satisfies the relationship between the total length L and the exposed height H while accommodating the hole area holding portions of the two locking pin plates and their working gap.

17. A pin assembly method for assembling ferromagnetic pins into mounting holes on blades, characterized in that, include: The magnetic action area formed by the magnetic element carried by the magnetic moving part and located below the support in the magnetic moving assembly is moved relative to the positioning disk with the assembly side facing upward, so that part of the ferromagnetic pin enters the target pin positioning hole of the positioning disk and abuts against the pin support surface of the support, and its assembly end is exposed on the assembly side. Drive the first locking pin plate and the second locking pin plate in opposite directions from the pass position that allows the ferromagnetic pin to move along the pin positioning hole to the holding position, so that the holding areas of the two locking pin plates contact the ferromagnetic pin from opposite sides of the inserted ferromagnetic pin to restrict its exit during residual material recycling. After the permission windows of the first position plate and the second position plate, which are respectively fixedly connected to the two locking pin plates, are aligned with the corresponding locking tongues fixedly connected to the recycling latch, the two locking tongues are first allowed to enter the two permission windows, and then the recycling latch is allowed to release the physical obstruction of the magnetic moving part from entering the residual material recycling area through the unique recycling channel. If any permission window is not aligned, the corresponding position plate blocks the corresponding locking tongue to prevent the recycling latch from releasing the physical obstruction. With the two locking tongues and two permission windows in a state of being engaged and the two locking pin plates restricted from leaving the holding position, the remaining ferromagnetic pins that have not entered the hole are moved to the residual material recycling area by the movement of the magnetic component, and the magnetic moving component is made to reach the predetermined retraction and stopping state before the locking pins are released. Align the mounting hole of the blade with the assembly end of the inserted ferromagnetic pin and press it in; and The recovery latch first re-establishes the physical block, the two latches then exit the two permission windows, the two locking pin plates return to the passage position, and the blade drives the ferromagnetic pin that has been inserted into the mounting hole to exit the positioning plate.

18. The pin assembly method according to claim 17, characterized in that, The sequence of locking pin, latch opening, latch closing, and lock pin pull-back is defined by a closed-slot locking pin drive cam and a closed-slot retraction latch cam on a shared switching shaft. The release pawl prevents the shared switching shaft from returning from the indexing position. Two blade positioning components are driven at two intervals of blades respectively. After the lifting magnetic head seat is stopped at a predetermined plane position and a predetermined retraction height, the moving component returns to its original position, causing all three blocking pins to avoid the release slide. The manual release component is operated to actively drive the release pawl out of the locking notch via the release slide. Then, the shared switching shaft is rotated in the return direction. After the shared switching shaft returns to the pass indexing position, the blade is removed and the release slide and each blocking pin are reset.

19. The pin assembly method according to claim 17, characterized in that, Before magnetic pin insertion, the hole selection component opens the target pin positioning hole required for the current pressing, and the blade positioning bridge moves away from the feeding and residual material transfer area. Before pin locking, the presence and contact status of the pins in the target pin positioning hole are checked. During pin locking, the elastic compensation displacement of the local holding unit corresponding to each target pin positioning hole relative to the pin locking plate body is used to adapt to the contact stroke difference of each hole. In the residual material recovery area, the remaining ferromagnetic pins are pushed into the receiving box by the material pusher and the receiving box cover is closed. Then, the magnetic moving component is retracted and stopped, and the blade positioning bridge is directly positioned on the common reference component shared with the positioning plate and the hole selection component.

20. The pin assembly method according to claim 17, characterized in that, The target pin positioning hole is set to correspond to the mounting hole that is close to the same pressing direction in the same pressing process, and the inlet plane of the mounting hole is made to coincide with the pressing reference surface when the blade reaches the pressing end position. Under the condition that the ferromagnetic pin abuts against the pin support surface and does not abut against the bottom of the mounting hole or the stop structure inside the hole in advance, the exposed height of the ferromagnetic pin relative to the pressing reference surface is converted into the axial insertion depth. When the mounting holes at both ends of the blade have opposite inlet directions, the blade orientation is changed and then assembled separately.

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