Multi-procedure composite machine tool for machining valve rod workpiece

Abstract

The invention relates to the technical field of valve rod machining equipment, and discloses a multi-procedure composite machine tool for valve rod workpiece machining, which comprises a main body structure, a transposition structure and a pair of clamping structures, the transposition structure is fixedly arranged on the main body structure, and the transposition structure moves back and forth and left and right through the main body structure; and the pair of clamping structures are symmetrically arranged on the transposition structure correspondingly, the pair of clamping structures can fix the valve rod correspondingly, and the valve rod can rotate on the clamping structures. The double-end alternate machining device has the beneficial effects that efficient double-end alternate machining is achieved, the production efficiency is improved, accurate positioning and transmission are achieved, the machining precision is guaranteed, fixed clamping and linkage adjustment are achieved, and the machining quality is improved; and automatic integrated control is achieved, the labor intensity of workers is reduced, and the device is suitable for machining valve rods of different diameters and different shapes and high in applicability.

Description

Technical Field

[0001] The invention relates to the technical field of valve stem processing equipment, in particular to a multi-process composite machine tool for processing a valve stem workpiece. Background Art

[0002] In the field of valve stem processing equipment technology, traditional valve stem processing machines usually adopt a single-head processing method, which requires manual flipping of the valve stem or replacement of processing equipment, resulting in low production efficiency and difficulty in ensuring positioning accuracy. Single-head processing requires multiple clamping, and the process connection takes a long time, which cannot meet the needs of mass production; manual or mechanical replacement structures are complex and prone to cumulative errors, affecting the coaxiality and dimensional accuracy of the valve stem processing at both ends; traditional clamping structures mostly use single-point or two-point clamping, and the valve stem is prone to offset during the rotation process, resulting in surface processing quality defects. Summary of the Invention

[0003] In view of the defects of the prior art, the present invention provides a multi-process composite machine tool for valve stem workpiece processing, which solves the technical problems of single-head processing, multiple clamping and low efficiency.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-process composite machine tool for valve stem workpiece processing, comprising a main body structure, a transposition structure and a pair of clamping structures, wherein the transposition structure is fixedly arranged on the main body structure, and the transposition structure moves forward and backward and left and right through the main body structure, and the pair of clamping structures are symmetrically arranged on the transposition structure, and the pair of clamping structures can respectively fix the valve stem, and the valve stem can rotate on the clamping structure.

[0005] Preferably, the main structure includes a base, a feed slide, a controller, a drilling machine and a milling machine; the feed slide is a cross-shaped slide, the feed slide is fixedly arranged in the middle of the upper wall of the base, the controller is fixedly arranged on the upper wall of the base and is located on the right side of the feed slide, the drilling machine is fixedly arranged on the upper wall of the right end of the base and is located behind the controller, and the milling machine is fixedly arranged at the left end of the base and corresponds to the drilling machine.

[0006] Preferably, the transposition structure is fixedly arranged on the feed slide rail, and the transposition structure can be opposite to the drilling machine through the feed slide rail.

[0007] Preferably, the transposition structure includes a chassis, a first motor, a transposition seat, a sub-control slide rail, a transmission seat, three transmission gears, a second motor and a pair of rotating frames; the chassis is fixedly arranged on the feed slide rail, the first motor is fixedly arranged in the chassis and the first motor driving end moves through the upper wall of the chassis, the transposition seat is fixedly arranged on the first motor driving end, and the transposition seat is located above the feed slide rail, the sub-control slide rail is fixedly arranged on the upper wall of the transposition seat and is located in the middle of the front end, one end of the transmission seat is fixedly arranged on the sub-control slide rail, and the transmission seat moves left and right, and the other end of the transmission seat The end is mountain-shaped, and three of the ends are concave. The three transmission gears are respectively movably embedded in the other end of the transmission base, and the three transmission gears are relatively meshed in series. One of the transmission gears is located between the other two transmission gears and is lower than the other two transmission gears. The second motor is fixedly set on the transmission base, and the second motor driving end is connected to one of the transmission gears. A pair of rotating frames are respectively symmetrically arranged on the upper walls of the left and right ends of the transposition seat and located on the rear side of the sub-control slide rail. The rotating frames respectively correspond to the transmission gears, and the middle part of the other end of the rotating frame is embedded with bearings.

[0008] Preferably, the clamping structure includes a main gear, a pair of shaft rings, three pillars, three limit nuts, an adjusting gear, a third motor, a driving gear, three clamping seats and three toggle shafts; the main gear is movably embedded in the other end of one of the rotating frames, a clamping hole is provided in the middle of the main gear, and moving grooves arranged in a clockwise direction are equidistantly provided on the outside of the clamping hole, a pair of shaft rings are symmetrically provided on the left and right side walls of the main gear, and the shaft rings are fixedly sleeved in the bearings of the rotating frame, one end of the three pillars is respectively screwed to the left side wall of the main gear, and the pillars are equidistantly arranged, and the pillars are all convex, the three limit nuts are respectively detachable and screwed on the other end of the pillars, the middle of the adjusting gear is provided with the same clamping hole as the main gear, and the adjusting gear The middle part is provided with toggle grooves corresponding to the moving grooves at equal intervals. The middle part of the adjusting gear is provided with three arc-shaped rotation grooves at equal intervals, and the rotation grooves are movably mounted on the other end of the pillar. The adjusting gear is movably arranged on the three pillars, and the adjusting gear is limited by a limit nut. The third motor is fixed on the side wall of the main gear and is located outside the adjusting gear. The driving gear is fixed on the driving end of the third motor, and the driving gear is meshed with the adjusting gear. The three clamps are relatively fitted between the adjusting gear and the main gear, and the clamps correspond to the moving grooves respectively. The three clamps are arranged clockwise, and the three toggle shafts are fixed through the middle part of the clamps respectively, and the two ends of the toggle shafts are movably inserted in the moving groove and the toggle groove respectively.

[0009] Preferably, the clamping seat is rotated by adjusting the gear, and the staggered fitting movement is driven by the toggle slot and the moving slot to limit the toggle shaft.

[0010] Preferably, the driving gear is located between the inner wall of the collar and the adjusting gear, so that the adjusting gear can rotate on the pillar.

[0011] Preferably, the main gear can be engaged with the transmission gear, which can enable the two clamping structures to be used alternately and conform to the rotation processing of the valve stem.

[0012] Preferably, the three clamping seats move at equal distances and form an equilateral triangle between the clamping seats.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. A pair of clamping structures are symmetrically arranged on the transposition structure. The first motor drives the transposition seat to rotate, which can realize the automatic alternation of the two clamping structures. Combined with the front, back, left and right movement of the cross-shaped feed slide, the two ends of the valve stem can be respectively aligned with the drilling machine and milling machine for processing, without manual flipping, thereby improving processing efficiency.

[0014] 2. The cross-shaped feed slide realizes the multi-dimensional precise movement of the transposition structure, and cooperates with the transmission of the transmission seat and the transmission gear to ensure the position accuracy of the valve stem during processing; the linkage design of the main gear and the transmission gear enables the valve stem to maintain stable rotation during the rotation process, such as thread turning.

[0015] 3. The clamping structure adopts three clamping seats distributed in an equilateral triangle. By adjusting the rotation of the gear, the toggle shaft is driven to move in conjunction with the movable groove and the toggle groove, so that the clamping seats are equidistantly and staggered to form a clamping structure with even force at three points. It can adapt to the stable clamping of valve stems of different diameters and avoid valve stem deviation during processing.

[0016] 4. The controller integrates the control of the feed slide, transposition structure and clamping structure to realize the automation of the entire process from clamping, transposition to processing, reducing human intervention; the design of the double clamping structure working alternately can load and unload materials at one end while processing at the other end, realizing continuous production, reducing workers' labor intensity, and reducing errors caused by human operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly structure of the present invention; Figure 2 This is a schematic diagram of the main structure assembly structure of the present invention; Figure 3 This is a schematic diagram of the enlarged structure of the assembly of the transposition structure and the clamping structure of the present invention; Figure 4 This is a schematic diagram of the disassembled and enlarged structure of the clamping structure of the present invention; Figure 5 This is a schematic diagram of the enlarged structure of the clamping structure assembly of the present invention; Figure 6This is a schematic diagram of the appearance of the clamping structure of the present invention; Figure 7 It is a schematic diagram of the enlarged structure of the assembly of the clamping structure and the rotating frame of the present invention.

[0018] In the figure: 1. main structure, 11. base, 12. feed slide, 13. controller, 14. drilling machine, 15. milling machine, 2. transposition structure, 21. chassis, 22. first motor, 23. transposition seat, 24. sub-control slide, 25. transmission seat, 26. transmission gear, 27. second motor, 28. rotating frame, 3. clamping structure, 31. main gear, 32. shaft ring, 33. support, 34. limit nut, 35. adjusting gear, 36. third motor, 37. driving gear, 38. clamping seat, 39. toggle shaft, 4. moving slot, 5. toggle slot, 6. rotating slot. DETAILED DESCRIPTION

[0019] The following is a combination of the embodiments of the present invention Figure 1-Figure 7 For further details:.

[0020] Embodiment: The present invention provides a technical solution: a multi-process composite machine tool for valve stem workpiece processing, comprising a main structure 1, a transposition structure 2 and a pair of clamping structures 3, the transposition structure 2 is fixedly arranged on the main structure 1, the transposition structure 2 moves forward and backward and left and right through the main structure 1, a pair of clamping structures 3 are symmetrically arranged on the transposition structure 2, the pair of clamping structures 3 can respectively fix the valve stem, and the valve stem can rotate on the clamping structure 3.

[0021] As a preferred embodiment, further, the main structure 1 includes a base 11, a feed slide 12, a controller 13, a drilling machine 14 and a milling machine 15; the base 11 is L-shaped, the feed slide 12 is a cross-shaped slide, the feed slide 12 is fixedly arranged in the middle of the upper wall of the base 11, the controller 13 is fixedly arranged on the upper wall of the base 11 and is located on the right side of the feed slide 12, the drilling machine 14 is fixedly arranged on the upper wall of the right end of the base 11 and is located behind the controller 13, and the milling machine 15 is fixedly arranged at the left end of the base 11 and corresponds to the drilling machine 14; the transposition structure 2 is driven to move left and right and forward and backward by the feed slide 12, one end of the valve stem is processed by the drilling machine 14, and the other end of the valve stem is processed by the milling machine 15.

[0022] More specifically, when one end of the valve stem needs to be processed, the controller 13 drives the feed slide 12 in the horizontal and vertical directions, driving the transposition structure 2 to move along the cross-shaped slide, so that the clamping structure 3 is precisely aligned in front of the processing end of the drilling machine 14 or the milling machine 15. Taking the different processes at both ends of the valve stem as an example, the drilling machine 14 can perform the drilling process, and the milling machine 15 can perform the outer circle turning process, thereby realizing continuous and different process processing of double-end processes.

[0023] As a preferred solution, further, the transposition structure 2 is fixedly arranged on the feed slide 12, and the transposition structure 2 can be opposite to the drilling machine 14 through the feed slide 12.

[0024] As a preferred solution, further, the transposition structure 2 includes a chassis 21, a first motor 22, a transposition seat 23, a sub-control slide 24, a transmission seat 25, three transmission gears 26, a second motor 27 and a pair of rotating frames 28; the chassis 21 is fixedly arranged on the feed slide 12, the first motor 22 is fixedly arranged in the chassis 21 and the driving end of the first motor 22 movably passes through the upper wall of the chassis 21, the transposition seat 23 is fixedly arranged on the driving end of the first motor 22, and the transposition seat 23 is located above the feed slide 12, the sub-control slide 24 is fixedly arranged on the upper wall of the transposition seat 23 and is located in the middle of the front end, one end of the transmission seat 25 is fixedly arranged on the sub-control slide 24, and the transmission seat 25 moves left and right, the other end of the transmission seat 25 is mountain-shaped, and three of the ends are concave, and the three transmission gears 26 are movably embedded in Inside the other end of the transmission seat 25, three transmission gears 26 are relatively meshed in series, one of the transmission gears 26 is located between the other two transmission gears 26 and is lower than the other two transmission gears 26. The second motor 27 is fixedly set on the transmission seat 25, and the driving end of the second motor 27 is connected to one of the transmission gears 26. A pair of rotating frames 28 are symmetrically arranged on the upper walls of the left and right ends of the transposition seat 23 and are located on the rear side of the sub-control slide rail 24. The rotating frames 28 correspond to the transmission gears 26 respectively, and the middle part of the other end of the rotating frames 28 is embedded with bearings; the transposition seat 23 is driven to rotate by the first motor 22 to realize the alternation of the rotating frames 28 on the transposition seat 23, and the transmission seat 25 is driven to move by the sub-control slide rail 24, so that the transmission gear 26 can be meshed with the main gear 31 in the clamping structure 3 in the rotating frame 28.

[0025] More specifically, when it is necessary to switch the processing position of the clamping structure 3, the controller 13 starts the first motor 22 and drives the position change seat 23 to rotate 180 degrees, so that the rotating frames 28 and the clamping structures 3 on the left and right sides are alternately replaced, realizing the alternation of loading and unloading, and ensuring the continuity of processing. The sub-control slide rail 24 drives the transmission seat 25 to move horizontally, and the transmission gears 26 are respectively engaged with the main gear 31, so that only one of the clamping structures 3 can be controlled to rotate, ensuring that the clamping structure 3 that is not being processed can be driven alone for loading and unloading. The transmission gears 26 on both sides are driven to rotate through the intermediate transmission gear 26, and then the main gear 31 engaged with it is driven to rotate, so that the valve stem in the clamping structure 3 can rotate at a uniform speed, and cooperate with the drilling machine 14 and the milling machine 15 to complete the processing.

[0026] As a preferred solution, further, the clamping structure 3 includes a main gear 31, a pair of shaft rings 32, three pillars 33, three limit nuts 34, an adjusting gear 35, a third motor 36, a driving gear 37, three clamping seats 38 and three toggle shafts 39; the main gear 31 is movably embedded in the other end of one of the rotating frames 28, a clamping hole is opened in the middle of the main gear 31, and the outer side of the clamping hole is equidistantly provided with moving grooves 4 arranged in a clockwise direction, a pair of shaft rings 32 are symmetrically arranged on the left and right side walls of the main gear 31, and The collars 32 are fixedly mounted in the bearings of the rotating frame 28, and one end of the three pillars 33 is respectively screwed to the left side wall of the main gear 31, and the pillars 33 are arranged equidistantly. The pillars 33 are all convex, and the three limit nuts 34 are detachably screwed to the other end of the pillars 33. The middle of the adjusting gear 35 is provided with the same clamping hole as the main gear 31, and the middle of the adjusting gear 35 is equidistantly provided with a toggle slot 5 corresponding to the moving slot 4. The middle of the adjusting gear 35 is equidistantly provided with three arc-shaped rotation slots 6, and the rotation slots 6 are respectively movable sleeves. At the other end of the pillar 33, the adjusting gear 35 is movably arranged on the three pillars 33, and the adjusting gear 35 is limited by the limit nut 34. The third motor 36 is fixedly arranged on the side wall of the main gear 31 and is located outside the adjusting gear 35. The driving gear 37 is fixedly arranged on the driving end of the third motor 36, and the driving gear 37 is engaged with the adjusting gear 35. The three clamping seats 38 are relatively fitted between the adjusting gear 35 and the main gear 31, and the clamping seats 38 respectively correspond to the moving slots 4. The three clamping seats 38 are arranged along Arranged clockwise, the three toggle shafts 39 are fixed and pass through the middle of the clamp seat 38, and the two ends of the toggle shaft 39 are movably inserted in the movable groove 4 and the toggle groove 5 respectively; the main gear 31 is engaged with the transmission gear 26, and the shaft ring 32 is rotated on the rotating frame 28 to drive the valve stem clamped by the clamp seat 38 to rotate, and the third motor 36 is driven to drive the adjusting gear 35 to rotate on the pillar 33, and the movable groove 4 and the toggle groove 5 are used to apply force to the toggle shaft 39, so that the clamp seat 38 is caused to slide relatively close to clamp.

[0027] More specifically, the valve stem passes through the clamping hole of the main gear 31 and the adjusting gear 35, driving the third motor 36 to start, and rotates with the help of the driving gear 37 to engage with the adjusting gear 35. The adjusting gear 35 can be rotated to a certain angle by the driving gear 37 with the help of the support 33. The toggle groove 5 thereon applies force to the clamp seat 38 through the toggle shaft 39, and the toggle shaft 39 slides with the help of the limiting movable groove 4, driving the three clamp seats 38 to move centripetally along the movable groove 4 until the valve stem is clamped; the main gear 31 rotates on the bearing of the rotating frame 28 through the shaft ring 32, driving the valve stem to rotate synchronously, and cooperating with the drilling machine 14 and the milling machine 15 to complete the processing.

[0028] As a preferred solution, further, the clamping seat 38 is rotated by adjusting the gear 35, and the staggered fitting movement is driven by the limiting of the toggle slot 5 and the moving slot 4 on the toggle shaft 39, which is used to design synchronous linkage requirements.

[0029] As a preferred solution, further, in order to realize the rotation of the adjusting gear 35 on the pillar 33, the driving gear 37 is located between the inner wall of the collar 32 and the adjusting gear 35 for design position requirements.

[0030] As a preferred solution, further, in order to alternately use the two clamping structures 3 and to match the rotation processing of the valve stem, the main gear 31 can be engaged with the transmission gear 26 to design alternate control.

[0031] As a preferred solution, further, in order to be able to apply force stably, the three clamping seats 38 move at equal distances, and the clamping seats 38 form an equilateral triangle for designing multi-fit clamping.

[0032] Working principle: Step 1: The equipment is stably supported by the base 11 in the main structure 1, and the processing steps of the drilling machine 14 and the milling machine 15 are set according to the processing requirements; Step 2: Insert the processed valve stem through the main gear 31 in the clamping structure 3 and the clamping hole in the middle of the adjusting gear 35. Then, drive the third motor 36 with the help of the controller 13. The third motor 36 drives the driving gear 37 to rotate. The driving gear 37 is engaged with the adjusting gear 35. The adjusting gear 35 is subjected to the force of the limiting nut 34 and is located on the pillar 33 with the help of the arc-shaped rotation groove 6 to limit the rotation to a certain angle. Step 3: The rotation of the adjustment gear 35 causes the corresponding toggle slot 5 to be misaligned with the movable slot 4, and then the toggle slot 5 applies force to the toggle shaft 39, driving the clamping seat 38 to slide within the movable slot 4, thereby achieving alternating movement of the three clamping seats 38 and achieving three-point clamping and fixing of the valve stem; Step 4: Then drive the first motor 22 in the chassis 21 of the transposition structure 2 to drive the transposition seat 23 to rotate, so that one end of the transposition seat 23 is located between the drilling machine 14 and the second clamping machine body. At this time, the other clamping structure 3 is in the reverse position, and the valve stem can be clamped again. Step 5: After the valve stem on one end of the transposition seat 23 is moved to face the drilling machine 14 and the milling machine 15 by driving the feed slide 12, the valve stem can be driven by the feed structure to move relative to one process for calibration, and then to the other processing process for calibration, so that the two ends of the valve stem can be processed in two processes respectively without disassembly and multiple clamping; Step 6. During the valve stem processing, the sub-control slide rail 24 can be driven to move the transmission gear 26 on one side of the transmission seat 25 toward the clamping structure 3 being processed, so that the transmission gear 26 on one side is engaged with the main gear 31 in the clamping structure 3, and then the second motor 27 is driven to drive the transmission gear 26 in the middle, and then drive the transmission gears 26 on both sides respectively, and then drive the main gear 31 to rotate on the rotating frame 28 with the help of the shaft ring 32, so as to realize the rotation and fitting processing after the valve stem is clamped.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or replacements made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A multi-process composite machine tool for valve stem workpiece processing, characterized in that: The invention comprises a main structure (1), a transposition structure (2) and a pair of clamping structures (3), wherein the transposition structure (2) is fixedly arranged on the main structure (1), the transposition structure (2) moves forward and backward and left and right through the main structure (1), and the pair of clamping structures (3) are symmetrically arranged on the transposition structure (2), the pair of clamping structures (3) can respectively fix the valve stem, and the valve stem can rotate on the clamping structure (3).

2. A multi-process composite machine tool for valve stem workpiece processing according to claim 1, characterized in that: The main structure (1) includes a base (11), a feed slide (12), a controller (13), a drilling machine (14) and a milling machine (15); The feed slide rail (12) is a cross-shaped slide rail, and the feed slide rail (12) is fixedly arranged on the middle part of the upper wall of the base (11). The controller (13) is fixedly arranged on the upper wall of the base (11) and is located on the right side of the feed slide rail (12). The drilling machine (14) is fixedly arranged on the upper wall of the right end of the base (11) and is located behind the controller (13). The milling machine (15) is fixedly arranged on the left end of the base (11) and corresponds to the drilling machine (14).

3. A multi-process composite machine tool for valve stem workpiece processing according to claim 2, characterized in that: The transposition structure (2) is fixedly arranged on the feed slide rail (12), and the transposition structure (2) can be opposite to the drilling machine (14) through the feed slide rail (12).

4. The multi-process compound machine tool for valve stem workpiece processing according to claim 3, characterized in that: The transposition structure (2) includes a chassis (21), a first motor (22), a transposition seat (23), a sub-control slide rail (24), a transmission seat (25), three transmission gears (26), a second motor (27) and a pair of rotating frames (28); The chassis (21) is fixedly arranged on the feed slide rail (12), the first motor (22) is fixedly arranged in the chassis (21) and the driving end of the first motor (22) moves through the upper wall of the chassis (21), the transposition seat (23) is fixedly arranged on the driving end of the first motor (22), and the transposition seat (23) is located above the feed slide rail (12), the sub-control slide rail (24) is fixedly arranged on the upper wall of the transposition seat (23) and is located in the middle of the front end, one end of the transmission seat (25) is fixedly arranged on the sub-control slide rail (24), and the transmission seat (25) moves left and right, the other end of the transmission seat (25) is mountain-shaped, and the three ends thereof are all concave, and the three transmission gears (2 6) are respectively movably embedded in the other end of the transmission seat (25), and the three transmission gears (26) are relatively meshed in series, one of the transmission gears (26) is located between the other two transmission gears (26) and is lower than the other two transmission gears (26), the second motor (27) is fixedly set on the transmission seat (25), and the driving end of the second motor (27) is connected to one of the transmission gears (26), a pair of the rotating frames (28) are symmetrically arranged on the upper walls of the left and right ends of the transposition seat (23) and located at the rear side of the sub-control slide rail (24), the rotating frames (28) respectively correspond to the transmission gears (26), and the middle part of the other end of the rotating frames (28) is embedded with a bearing.

5. The multi-process compound machine tool for valve stem workpiece processing according to claim 4, characterized in that: The clamping structure (3) includes a main gear (31), a pair of shaft rings (32), three pillars (33), three limit nuts (34), an adjustment gear (35), a third motor (36), a driving gear (37), three clamping seats (38) and three toggle shafts (39); The main gear (31) is movably embedded in the other end of one of the rotating frames (28). A clamping hole is opened in the middle of the main gear (31), and a moving groove (4) arranged in a clockwise direction is equidistantly arranged on the outside of the clamping hole. A pair of the shaft rings (32) are symmetrically arranged on the left and right side walls of the main gear (31), and the shaft rings (32) are fixedly sleeved in the bearings of the rotating frame (28). One end of the three pillars (33) is respectively screwed to the left side wall of the main gear (31), and the pillars (33) are equidistantly arranged. The pillars (33) are all convex. The three limit nuts (34) are detachably screwed on the other end of the pillars (33). The adjusting gear (35) has the same clamping hole as the main gear (31) in the middle. The adjusting gear (35) has a toggle groove (5) corresponding to the moving groove (4) equidistantly opened in the middle. The adjusting gear (35) has three arc-shaped rotating grooves equidistantly opened in the middle. The adjusting gear (35) is movably arranged on the three pillars (33), and the adjusting gear (35) is limited by the limiting nut (34). The third motor (36) is fixedly arranged on the side wall of the main gear (31) and is located outside the adjusting gear (35). The driving gear (37) is fixedly arranged on the driving end of the third motor (36), and the driving gear (37) is engaged with the adjusting gear (35). The three clamping seats (38) are relatively fitted between the adjusting gear (35) and the main gear (31), and the clamping seats (38) respectively correspond to the movable slots (4). The three clamping seats (38) are arranged in a clockwise direction. The three toggle shafts (39) are respectively fixed and penetrate the middle of the clamping seat (38), and the two ends of the toggle shaft (39) are respectively movably inserted into the movable slot (4) and the toggle slot (5).

6. The multi-process compound machine tool for valve stem workpiece processing according to claim 5, characterized in that: The clamping seat (38) is rotated by adjusting the gear (35), and the staggered fitting movement is driven by the limiting of the toggle slot (5) and the moving slot (4) on the toggle shaft (39).

7. The multi-process compound machine tool for valve stem workpiece processing according to claim 6, characterized in that: The driving gear (37) is located between the inner wall of the collar (32) and the adjusting gear (35), and is capable of enabling the adjusting gear (35) to rotate on the support (33).

8. The multi-process compound machine tool for machining valve stem workpiece according to claim 7, characterized in that: The main gear (31) can mesh with the transmission gear (26), enabling the two clamping structures (3) to be used alternately and to match the rotation processing of the valve stem.

9. The multi-process compound machine tool for valve stem workpiece processing according to claim 8, characterized in that: The three clamping seats (38) move at equal distances, and the clamping seats (38) form an equilateral triangle.

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