Curved surface machining lathe for positioning pin shaft

Abstract

The invention discloses a curved surface machining lathe for a positioning pin shaft, and relates to the technical field of machining. A curved surface machining lathe for a positioning pin shaft comprises a base mechanism and a machining assembly, the machining assembly comprises a re-carving mechanism, the re-carving mechanism comprises a housing, an inductor is fixedly embedded in the upper inner wall of the housing, an adjusting rail is fixedly embedded in the inner wall of the side face of the housing, a clamping strip is slidably inserted in the adjusting rail, and a lantern ring is arranged in the housing; the side edge of the lantern ring is fixedly connected with a ring rod in sliding insertion connection with a clamping strip, the lower end face of the housing is fixedly connected with a base, electric rails are fixedly connected to the inner walls of the two side faces of the base in an embedded mode respectively, insertion blocks are inserted into the electric rails in a sliding mode, and a cutter body assembly is inserted into the lower side of the recarving mechanism and comprises a cutter shaft mechanism which comprises a cutter shaft. According to the curved surface machining lathe for the positioning pin shaft, machining of various eccentric positioning pin shafts can be completed, and the diversity and comprehensiveness of machining are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and particularly to a lathe for machining the curved surface of a positioning pin shaft. Background Art

[0002] A positioning pin shaft is a component widely used in the mechanical field. Its main function is to achieve precise positioning and connection between components, ensure the relative position accuracy of each component during assembly and operation, and thus ensure the normal operation of the entire mechanical system. The positioning pin shaft is generally cylindrical, and some positioning pin shafts may be designed with special structures at the end or middle, such as curved surfaces, conical surfaces, and curved surfaces with special curves, etc., for easy installation, fixation, or cooperation with other parts.

[0003] The patent with the publication number CN208772464U discloses a device for machining the curved surface of an eccentric dumbbell pin. The device for machining the curved surface of the eccentric dumbbell pin of the present invention includes a dumbbell pin fixing device, a three-jaw chuck, a lathe center, and a turning tool. The dumbbell pin fixing device includes a positioning sleeve, a sleeve, and two adjusting bolts. The inner holes of the positioning sleeve and the sleeve are eccentrically arranged. The positioning sleeve and the sleeve are respectively sleeved and connected to both ends of the dumbbell pin. The positioning sleeve and the adjusting bolts fix both ends of the dumbbell pin. Since the center of the outer diameter of the positioning sleeve, the center of the outer diameter of the sleeve, and the center line of the first pin part are on the same axis, when the three-jaw chuck drives the positioning sleeve to rotate, the rotation axis of the three-jaw chuck is the rotation center of the first pin part. In this way, the first pin part can only rotate around the axis, so that it can be stably machined by the turning tool, saving auxiliary time such as clamping and alignment, and improving the machining accuracy. At the same time, the pre-drilling center hole process for forging the eccentric dumbbell pin is reduced, saving costs and improving efficiency.

[0004] In the above technical solution, the curved surface of the eccentric positioning pin shaft can be machined, but it can only be machined for the eccentric positioning pin shaft. When there is a non-eccentric positioning pin shaft with a curved surface with a special curve, its machining conditions are limited. Therefore, there is an urgent need for a lathe for machining the curved surface of a positioning pin shaft to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a lathe for machining the curved surface of a positioning pin shaft to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A lathe for machining the curved surface of a positioning pin shaft, including a base mechanism and a machining component;

[0007] The base mechanism includes a base. A fixing component for fixing the positioning pin shaft is arranged on the upper surface of the base, and a moving component is mounted on the fixing component;

[0008] The processing component is movably installed on the moving component. The processing component includes a replication mechanism, which includes a housing. An inductor is fixedly embedded in the upper inner wall of the housing. An adjustment rail is fixedly embedded in the side inner wall of the housing, and a clamping strip is slidably inserted into the adjustment rail.

[0009] A collar is arranged in the housing, and a ring rod for slidably inserting the clamping strip is fixedly connected to the side of the collar.

[0010] The lower end surface of the housing is fixedly connected to a base, and electric rails are respectively fixedly embedded in the inner walls of the two side surfaces of the base. An insertion block is slidably inserted into the electric rails.

[0011] A tool body component is inserted below the replication mechanism. The tool body component includes a tool shaft mechanism, which includes a tool shaft fixedly inserted into the collar. The upper end of the tool shaft is fixedly connected to a sensing head for sensing the inductor. A tool groove is opened at the lower end of the tool shaft, and a tool head component is installed in the tool groove.

[0012] As a preferred technical solution of the present invention, the fixing component includes a revolving component and a supporting component.

[0013] The revolving component includes an annular rail fixedly connected to the base. A first slider is slidably inserted into the annular rail. A first motor is fixedly embedded on the first slider. The output end of the first motor extends out of the annular rail and is fixedly connected to a fixing seat for gripping and positioning one end of a positioning pin.

[0014] The supporting component includes a panel fixedly connected to the base. A first hydraulic telescopic column is fixedly connected to the surface of the panel. The output end of the first hydraulic telescopic column is fixedly connected to a conical abutting column, and the abutting column is opposite to the fixing seat at the upper part of the central position.

[0015] The moving component includes a cross beam rail. Brackets are respectively fixedly connected to both ends of the cross beam rail. One bracket is fixedly mounted on the annular rail, and the other bracket is fixedly mounted on the panel.

[0016] As a preferred technical solution of the present invention, a tool pad for protecting the tool head component is fixedly connected to the upper inner wall of the tool groove.

[0017] The tool head component includes a first rotating shaft penetrating through the tool groove. A tool head and a recognition head adapted to be inserted into the tool groove are fixedly connected to the first rotating shaft. The tool head and the recognition head are centrosymmetric. A cross-shaped locking hole is opened through the end of the first rotating shaft extending out of the tool shaft.

[0018] A second rotating shaft is inserted into the upper part of the tool shaft. The end of the second rotating shaft extends out of the tool shaft and is fixedly butted with a third motor installed on the tool shaft. A chain movably embedded in the tool shaft is jointly sleeved on the ends of the second rotating shaft and the first rotating shaft.

[0019] A pneumatic pump is fixedly embedded in the middle of the tool shaft. On both sides of the pneumatic pump, air pipes extending out of the tool shaft are respectively and fixedly communicated. The end heads of the air pipes are communicated with cylinders fixedly connected to the tool shaft, and the output ends of the cylinders are adaptively inserted into lock holes.

[0020] As a preferred technical solution of the present invention, a tool sleeve mechanism is arranged outside the tool shaft mechanism. The tool sleeve mechanism includes a tool sleeve sleeving the tool shaft, and a column is fixedly connected between the tool sleeve and the tool shaft;

[0021] Vertical grooves for slidably inserting plug blocks are respectively formed through both side wall surfaces of the tool sleeve, and springs fitting the plug blocks are fixedly connected in the vertical grooves.

[0022] As a preferred technical solution of the present invention, a positioning mechanism is arranged above the replication mechanism. The positioning mechanism includes a second hydraulic telescopic column. The fixed end of the second hydraulic telescopic column is fixedly connected with a second slider slidably inserted into a cross beam rail. The output end of the second hydraulic telescopic column is fixedly connected with a second motor. The output end of the second motor is fixedly connected with a connecting plate, and the connecting plate is fixedly connected with a housing.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] (1) A lathe for machining the curved surface of a positioning pin. By using a sensor to identify and record the movement of the tool shaft, the side curved surface of the mold is replicated, and then the positions of the tool head and the recognition head are switched. While the tool body assembly slides along the base, the replicated data drives the tool body assembly to move up and down along the adjusting rail through the sliding of the clamping strip, so as to realize the replication machining of the mold on the workpiece to be machined. By replicating the curved surface of the mold first, various complex curved surface machinings of the positioning pin are realized, and the quality of the machined curved surface is improved.

[0025] (2) A lathe for machining the curved surface of a positioning pin. The positioning rotating rings of the tool head and the recognition head ensure the complete consistency of the positioning of the tool head and the recognition head, thereby ensuring the consistency of the replication path and improving the machining uniformity.

[0026] (3) A lathe for machining the curved surface of a positioning pin. Through the setting of the tool pads in the tool grooves, when replicating the mold, the recognition head contacts the mold, and at this time the tool head is protected by the tool pads. When machining the positioning pin, the tool head contacts the positioning pin, and at this time the recognition head is protected by the tool pads, thus effectively protecting the tool head assembly and prolonging its service life.

[0027] (4) A lathe for machining the curved surface of a positioning pin shaft, which arranges the easily damaged device, the third motor, away from the tool head assembly, and buries the air pump in the tool shaft for protection, so that it is away from the machining risk during the machining process, and at the same time is protected by the tool shaft and the tool sleeve mechanism, thereby reducing the damage rate and lowering its maintenance cost.

[0028] (5) A lathe for machining the curved surface of a positioning pin shaft, which senses and identifies the Y-axis data of the tool shaft when determining the X-axis data through a sensor, and then can perform a one-to-one replication during machining. By increasing the number of positioning points of the X-axis data and the Y-axis data, the actual machining accuracy can be changed, so as to realize the switching between rough machining and finish machining and improve the adaptability of the machining range.

[0029] (6) A lathe for machining the curved surface of a positioning pin shaft, which drives the replication mechanism to rotate 180 degrees by a second motor, so that machining on the other side can be carried out immediately. At this time, the replication time is shortened by half during the replication process, and the machining efficiency can be improved for the positioning pin shaft with a symmetric shape.

[0030] (7) A lathe for machining the curved surface of a positioning pin shaft. For the eccentric positioning pin shaft, the X-axis data can be determined in advance by the position of the tool body assembly in the replication mechanism. For the Y-axis data, by rotating the mold one week driven by the rotation of the first motor and replicating the Y-axis data of one week of the mold, the machining of various eccentric positioning pin shafts can be completed, improving the diversity and comprehensiveness of machining.

[0031] (8) A lathe for machining the curved surface of a positioning pin shaft, which machined the positioning pin shaft clamped by the central fixing seat through the setting of the revolving component, and the positioning pin shaft can be installed and disassembled at other positions, improving the convenience and safety of loading and unloading, increasing the speed of loading and unloading, and thus improving the overall machining efficiency. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the present invention;

[0033] Figure 2 is a schematic diagram of the base mechanism of the present invention;

[0034] Figure 3 is a schematic diagram of the moving component of the present invention;

[0035] Figure 4 is a schematic diagram of the revolving component of the present invention;

[0036] Figure 5 is a schematic diagram of the supporting component of the present invention;

[0037] Figure 6 is a schematic diagram of the machining component of the present invention;

[0038] Figure 7Schematic diagram of the positioning mechanism of the present invention;

[0039] Figure 8 Schematic diagram of the connection of the replication mechanism of the present invention;

[0040] Figure 9 Bottom view schematic diagram of the replication mechanism of the present invention;

[0041] Figure 10 Schematic diagram of the tool body assembly of the present invention;

[0042] Figure 11 Schematic diagram of the tool sheath mechanism of the present invention;

[0043] Figure 12 Schematic diagram of the tool shaft mechanism of the present invention;

[0044] Figure 13 Internal schematic diagram of the tool shaft mechanism of the present invention.

[0045] In the figure: 1. Base mechanism; 101. Base; 102. Ring rail; 103. First slider; 104. First motor; 105. Fixed seat; 106. Panel; 107. First hydraulic telescopic column; 108. Contact column; 109. Cross beam rail; 110. Bracket; 2. Positioning mechanism; 201. Second hydraulic telescopic column; 202. Second slider; 203. Second motor; 204. Connecting plate; 3. Replication mechanism; 301. Housing; 302. Inductor; 303. Adjusting rail; 304. Clip; 305. Collar; 306. Ring rod; 307. Base; 308. Electric rail; 309. Insert block; 4. Tool shaft mechanism; 401. Tool shaft; 402. Induction head; 403. Tool groove; 404. Tool pad; 405. First rotating shaft; 406. Tool bit; 407. Identification head; 408. Lock hole; 409. Second rotating shaft; 410. Third motor; 411. Chain; 412. Air pump; 413. Air pipe; 414. Cylinder; 5. Tool sheath mechanism; 501. Tool sheath; 502. Column; 503. Vertical groove; 504. Spring. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Embodiment: Please refer to Figure 1 , Figure 2 , Figure 6 , Figure 8 , Figure 9 , Figure 10 ,Figure 12 , a surface machining lathe for positioning pin shaft, comprising a base mechanism 1 and a machining component;

[0048] The base mechanism 1 comprises a base 101, the upper surface of the base 101 is provided with a fixing component for fixing a positioning pin shaft, and a moving component is mounted on the fixing component;

[0049] The processing assembly is movably mounted on the moving assembly, and the processing assembly includes a replicating mechanism 3, and the replicating mechanism 3 includes a cover 301, and a sensor 302 is fixedly embedded in the upper inner wall of the cover 301, and an adjustment rail 303 is fixedly embedded in the side inner wall of the cover 301, and a clamping strip 304 is slidably inserted in the adjustment rail 303, and the clamping strip 304 can only slide up and down along the adjustment rail 303;

[0050] A collar 305 is provided in the housing 301, and a ring rod 306 of the sliding plug-in clamp 304 is fixedly connected to the side of the collar 305;

[0051] The lower end surface of the housing 301 is fixedly connected with a base 307, and the inner walls of the two side surfaces of the base 307 are respectively fixedly embedded with electric rails 308, and an insert block 309 is slidably inserted in the electric rail 308;

[0052] A knife body assembly is inserted at the lower side of the replicating mechanism 3, and the knife body assembly includes a knife shaft mechanism 4. The knife shaft mechanism 4 includes a knife shaft 401 with a fixed plug-in ring 305. The upper end of the knife shaft 401 is fixedly connected with a sensing head 402 for sensing the sensor 302. The lower end of the knife shaft 401 is provided with a knife groove 403, and a knife head assembly is installed in the knife groove 403.

[0053] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 , the fixed component includes a swivel component and a support component;

[0054] The swivel assembly includes a ring rail 102 fixedly connected to a base 101, a first slider 103 is slidably inserted in the ring rail 102, a first motor 104 is fixedly embedded on the first slider 103, an output end of the first motor 104 extends out of the ring rail 102 and is fixedly connected to a fixed seat 105 for clamping one end of a positioning pin; the ring rail 102 is slidably inserted with a plurality of fixed seats 105 through the first slider 103, the fixed seat 105 at the center position clamps the positioning pin for processing, and the fixed seats 105 at other positions are used for installing or removing the positioning pin;

[0055] The support assembly includes a panel 106 fixedly connected to the base 101, a first hydraulic telescopic column 107 is fixedly connected to the surface of the panel 106, a conical abutment column 108 is fixedly connected to the output end of the first hydraulic telescopic column 107, and the abutment column 108 is directly opposite to the fixed seat 105 at the upper center position.

[0056] The moving component includes a cross beam rail 109. At both ends of the cross beam rail 109, brackets 110 are fixedly connected respectively. One bracket 110 is fixedly mounted on the ring rail 102, and the other bracket 110 is fixedly mounted on the panel 106.

[0057] Please refer to Figure 12 、 Figure 13 , on the upper inner wall of the tool groove 403, a tool pad 404 for protecting the tool head component is fixedly connected;

[0058] The tool head component includes a first rotating shaft 405 penetrating through the tool groove 403. On the first rotating shaft 405, a tool head 406 and an identification head 407 adapted to be inserted into the tool groove 403 are fixedly connected. The tool head 406 and the identification head 407 are centrosymmetric. The end of the first rotating shaft 405 extends out of the tool shaft 401 and is provided with a cross-shaped locking hole 408.

[0059] The upper part of the tool shaft 401 is inserted with a second rotating shaft 409. The end of the second rotating shaft 409 extends out of the tool shaft 401 and is fixedly docked with a third motor 410 mounted on the tool shaft 401. The ends of the second rotating shaft 409 and the first rotating shaft 405 are jointly sleeved with a chain 411 movably embedded in the tool shaft 401;

[0060] In the middle of the tool shaft 401, an air pump 412 is fixedly embedded. On both sides of the air pump 412, air pipes 413 extending out of the tool shaft 401 are fixedly communicated respectively. The ends of the air pipes 413 are communicated with a cylinder 414 fixedly connected to the tool shaft 401. The output end of the cylinder 414 is adapted to be inserted into the locking hole 408, and the cylinder 414 locks the tool head component by inserting into the locking hole 408.

[0061] Please refer to Figure 9 、 Figure 10 、 Figure 11 , outside the tool shaft mechanism 4, a tool sleeve mechanism 5 is provided. The tool sleeve mechanism 5 includes a tool sleeve 501 sleeving the tool shaft 401. Between the tool sleeve 501 and the tool shaft 401, a column 502 is fixedly connected;

[0062] Vertical grooves 503 for slidably inserting the insertion blocks 309 are respectively penetrated through the two side wall surfaces of the tool sleeve 501. In the vertical grooves 503, springs 504 fitting the insertion blocks 309 are fixedly connected; Initially, the insertion blocks 309 are at the upper part of the vertical grooves 503, and the springs 504 are in a natural state.

[0063] Please refer to Figure 6 、 Figure 7, a positioning mechanism 2 is arranged on the upper side of the replication mechanism 3. The positioning mechanism 2 includes a second hydraulic telescopic column 201. The fixed end of the second hydraulic telescopic column 201 is fixedly connected to a second slider 202 of a sliding plug-in cross beam rail 109. The output end of the second hydraulic telescopic column 201 is fixedly connected to a second motor 203. The output end of the second motor 203 is fixedly connected to a connecting plate 204. The connecting plate 204 is fixedly connected to a housing 301. The connecting plate 204 is directly opposite to the tip position of the cutter head 406 in the working state.

[0064] The working principle of the present invention is as follows:

[0065] Before processing the positioning pin shaft, the pre-made mold is clamped by the fixing seat 105 and sent to the central position through the ring rail 102. The first hydraulic telescopic column 107 is extended to abut against the mold through the abutting column 108. The second hydraulic telescopic column 201 is started to extend so that the recognition head 407 contacts the surface of the mold. Then, the second hydraulic telescopic column 201 is further extended to lower the replication mechanism 3. When the insertion block 309 slides to the middle of the vertical groove 503, it stops. Then, the insertion block 309 slides along the electric rail 308 to drive the cutter shaft mechanism 4 to slide on the surface of the mold. The movement of the cutter shaft 401 is recognized and recorded by the inductor 302, so as to replicate the side curved surface of the mold. Then, the positions of the cutter head 406 and the recognition head 407 are switched. While the cutter body assembly slides along the base 307, the replicated data drives the cutter body assembly to move up and down along the adjustment rail 303 through the clamping strip 304, so as to realize the replication processing of the mold on the workpiece to be processed. By replicating the curved surface of the mold first, various complex curved surface processing of the positioning pin shaft can be realized, and the quality of the processed curved surface can be improved.

[0066] After the recognition head 407 completes the replication of the mold, the air pump 412 drives the cylinder 414 to contract, the third motor 410 drives the second rotating shaft 409 to rotate, and then the first rotating shaft 405 is driven to rotate 180 degrees through the chain 411, so as to switch the cutter head 406. Then, the output end of the cylinder 414 is inserted into the first rotating shaft 405 to limit the cutter head assembly. The positioning rotating rings of the cutter head 406 and the recognition head 407 ensure the complete consistency of the positioning of the cutter head 406 and the recognition head 407, and then ensure the consistency of the replication path and improve the processing uniformity.

[0067] Through the setting of the cutter pad 404 in the cutter groove 403, when replicating the mold, the recognition head 407 contacts the mold. At this time, the cutter head 406 is protected by the cutter pad 404. When processing the positioning pin shaft, the cutter head 406 contacts the positioning pin shaft. At this time, the recognition head 407 is protected by the cutter pad 404, so as to effectively protect the cutter head assembly and extend its service life.

[0068] The third motor 410, a vulnerable device, is arranged away from the cutter head assembly, and the air pump 412 is buried in the cutter shaft 401 for protection, thereby keeping it away from processing risks during the processing and being protected by the cutter shaft 401 and the cutter sleeve mechanism 5, thereby reducing the damage rate and its maintenance cost.

[0069] In the process of replicating the mold through the identification head 407, the plug block 309 slides along the electric rail 308 to record the X-axis data, and the sensor 302 senses and identifies the Y-axis data of the tool axis 401 when the X-axis data is set. Subsequently, one-to-one replication can be performed during processing. By increasing the number of positioning points for the X-axis data and the Y-axis data, the actual processing accuracy can be changed, thereby realizing the switching between rough processing and fine processing and improving the adaptability of the processing range.

[0070] When the positioning pin shaft to be processed has a symmetrical structure, the center point of the mold can be identified by the abutment of the abutment column 108 against the mold, and then the positioning mechanism 2 is driven by the sliding along the crossbeam rail 109 to position the tool body assembly to the center point of the mold for unilateral replication. In the actual processing process, after the unilateral processing of the positioning pin shaft is completed, the second motor 203 drives the replication mechanism 3 to rotate one hundred and eighty degrees, so that the other side can be processed immediately. At this time, the replication time is shortened by half during the replication process, and the processing efficiency of the positioning pin shaft with a symmetrical shape can be improved.

[0071] For eccentric locating pins, the X-axis data can be determined in advance through the position of the tool body assembly in the replicating mechanism 3. For the Y-axis data, the mold is driven to rotate one circle by the rotation of the first motor 104, and the Y-axis data of the mold for one circle is replicated. This can complete the processing of various eccentric locating pins, thereby improving the diversity and comprehensiveness of the processing.

[0072] By setting up a swivel assembly, the positioning pin clamped by the central fixing seat 105 can be processed, and the positioning pins can be installed and removed at other positions, thereby improving the convenience and safety of loading and unloading, increasing the speed of loading and unloading, and thus improving the overall processing efficiency.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lathe for processing curved surfaces of positioning pins, comprising a base mechanism (1) and a processing assembly; The base mechanism (1) includes a base (101), and a fixing component for fixing a positioning pin shaft is arranged on the upper surface of the base (101), and is characterized in that: A moving component is mounted on the fixed component; The processing assembly is movably mounted on the moving assembly, the processing assembly comprises a replicating mechanism (3), the replicating mechanism (3) comprises a cover shell (301), a sensor (302) is fixedly embedded in the upper inner wall of the cover shell (301), an adjustment rail (303) is fixedly embedded in the side inner wall of the cover shell (301), and a clamping strip (304) is slidably inserted in the adjustment rail (303); A collar (305) is provided inside the cover shell (301), and a ring rod (306) of a sliding plug-in clamp (304) is fixedly connected to the side of the collar (305); The lower end surface of the cover shell (301) is fixedly connected to a base (307), the inner walls of the two side surfaces of the base (307) are respectively fixedly embedded with electric rails (308), and an insert block (309) is slidably inserted in the electric rail (308); A knife body assembly is inserted at the lower side of the replicating mechanism (3), and the knife body assembly includes a knife shaft mechanism (4), and the knife shaft mechanism (4) includes a knife shaft (401) fixed with a plug-in ring (305), and a sensing head (402) for sensing a sensor (302) is fixedly connected to the upper end of the knife shaft (401), and a knife groove (403) is formed at the lower end of the knife shaft (401), and a knife head assembly is installed in the knife groove (403).

2. A curved surface processing lathe for a positioning pin shaft according to claim 1, characterized in that: The fixing assembly includes a swivel assembly and a support assembly; The swivel assembly comprises a ring rail (102) fixedly connected to a base (101), a first slider (103) is slidably inserted in the ring rail (102), a first motor (104) is fixedly embedded on the first slider (103), an output end of the first motor (104) extends out of the ring rail (102) and is fixedly connected to a fixed seat (105) for clamping one end of a positioning pin shaft; The support assembly comprises a panel (106) fixedly connected to a base (101); a first hydraulic telescopic column (107) is fixedly connected to the surface of the panel (106); a conical abutment column (108) is fixedly connected to the output end of the first hydraulic telescopic column (107); and the abutment column (108) is directly opposite to the fixed seat (105) at the upper middle position.

3. A surface machining lathe for a positioning pin shaft according to claim 2, characterized in that: The moving assembly comprises a crossbeam rail (109), and brackets (110) are respectively fixedly connected at both ends of the crossbeam rail (109), one of the brackets (110) is fixedly connected to the ring rail (102), and the other bracket (110) is fixedly connected to the panel (106).

4. A surface machining lathe for a positioning pin shaft according to claim 1, characterized in that: A knife pad (404) for protecting the knife head assembly is fixedly connected to the upper inner wall of the knife groove (403); The cutter head assembly comprises a first rotating shaft (405) passing through the cutter groove (403); a cutter head (406) and an identification head (407) adapted to be plugged into the cutter groove (403) are fixedly connected to the first rotating shaft (405); the cutter head (406) and the identification head (407) are centrally symmetrical; an end of the first rotating shaft (405) extends out of the cutter shaft (401) and is provided with a cross-shaped locking hole (408) passing through the first rotating shaft (405).

5. A surface machining lathe for a positioning pin shaft according to claim 4, characterized in that: The upper part of the tool shaft (401) is inserted with a second rotating shaft (409). The end of the second rotating shaft (409) extends out of the tool shaft (401) and is fixedly butted with a third motor (410) installed on the tool shaft (401). The ends of the second rotating shaft (409) and the first rotating shaft (405) are jointly sleeved with a chain (411) movably embedded in the tool shaft (401). The middle part of the tool shaft (401) is fixedly embedded with an air pump (412). The two sides of the air pump (412) are respectively fixedly communicated with air pipes (413) extending out of the tool shaft (401). The ends of the air pipes (413) are communicated with a cylinder (414) fixedly connected to the tool shaft (401). The output end of the cylinder (414) is adaptively inserted into the lock hole (408).

6. A curved surface processing lathe for a positioning pin shaft according to claim 1, characterized in that: A tool sleeve mechanism (5) is arranged outside the tool shaft mechanism (4). The tool sleeve mechanism (5) includes a tool sleeve (501) sleeved on the tool shaft (401). A column (502) is fixedly connected between the tool sleeve (501) and the tool shaft (401). Vertical grooves (503) for slidably inserting the plug blocks (309) are respectively formed through the two side wall surfaces of the tool sleeve (501). Springs (504) fitting the plug blocks (309) are fixedly connected in the vertical grooves (503).

7. A surface machining lathe for a positioning pin shaft according to claim 3, characterized in that: A positioning mechanism (2) is arranged above the replication mechanism (3). The positioning mechanism (2) includes a second hydraulic telescopic column (201). The fixed end of the second hydraulic telescopic column (201) is fixedly connected with a second slider (202) slidably inserted into the cross beam rail (109). The output end of the second hydraulic telescopic column (201) is fixedly connected with a second motor (203). The output end of the second motor (203) is fixedly connected with a connecting plate (204). The connecting plate (204) is fixedly connected with the housing (301).

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