A multi-workpiece synchronous machining device and a machining method

Abstract

The application discloses a kind of multi-workpiece synchronous processing device and processing method, wherein processing device includes with the multi-station seat of rotary chuck connection, the multi-station seat is provided with several processing stations, workpiece fixing assembly is provided on the processing station, workpiece fixing assembly connects processing piece, each processing station is arranged along the rotation axis direction of rotary chuck, the axis of processing piece is perpendicular to the rotation axis of rotary chuck.The application provides a kind of multi-workpiece synchronous processing device, can switch the end face and side of processing piece by the self rotation of rotary chuck after once clamping of rotary chuck, avoids the step of multi-process processing.

Description

Technical Field

[0001] This invention relates to the field of machining lathe technology, and in particular to a multi-workpiece synchronous machining device and machining method. Background Technology

[0002] For example, publication number "CN213701805U" discloses "a lathe for machining bushings," including a base, a three-jaw chuck, a cutting tool, and a motor. The base is equipped with a collection mechanism for collecting chips generated during turning. The collection mechanism includes a connecting pipe on the base, a chip removal pipe connected to the connecting pipe at its lower end and extending out of one side of the base, a pushing component at the other end of the chip removal pipe for pushing out chips from the chip removal pipe, two protective covers rotatably connected to the connecting pipe and located on both sides of the bushing, through holes at both ends of the protective covers for the bushing and cutting tool to enter the cavity of the protective covers, and a locking component on the protective covers for locking the two protective covers together. However, in practical applications, when directly clamping the workpiece with the chuck, the position and orientation of the chuck need to be changed as a whole and multiple positioning adjustments are required when machining the end face and two sides of the workpiece, necessitating multiple machining operations. Summary of the Invention

[0003] In view of the problem mentioned in the background art that the end face and side face of the workpiece need to be repositioned and adjusted, the present invention provides a multi-workpiece synchronous processing device, which can switch the end face and side face of the workpiece by rotating the rotary chuck itself after clamping once, thus avoiding the need for multiple processing steps.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A multi-workpiece synchronous processing device includes a multi-station base connected to a rotary chuck, the multi-station base being provided with a plurality of processing stations, each processing station being provided with a workpiece fixing assembly, the workpiece fixing assembly being connected to a workpiece, each processing station being arranged along the rotation axis of the rotary chuck, and the axis of the workpiece being perpendicular to the rotation axis of the rotary chuck.

[0006] The workpiece fixing assembly includes a positioning seat, a screw connected to the positioning seat, the screw including a fixed end that can pass through the workpiece, a quick-release pad connected to the fixed end, and a locking nut connected to the screw on the side of the quick-release pad away from the positioning seat.

[0007] The quick-release pad is provided with a quick-release notch.

[0008] The quick-release pad includes stacked rigid discs and elastic plastic discs, with the elastic plastic discs abutting against the workpiece.

[0009] The processing station is provided with a placement groove, and the positioning seat is engaged in the placement groove.

[0010] The multi-station seat includes a clamping rod at one end and a central hole. The rotating chuck clamps the clamping rod, and the central hole abuts against the tip of the tailstock.

[0011] The multi-station base is threadedly connected to a tensioning rotating rod on the side away from the machining station. A tensioning cone is provided on the side of the tensioning rotating rod close to the machining station. The workpiece fixing assembly includes a positioning seat. Several tensioning sliders that engage with the machining parts are slidably connected to the positioning seat. Each tensioning slider includes a tensioning inclined surface that abuts against the tensioning cone. A compression spring is provided between the tensioning slider and the fixed outer plate.

[0012] The tensioning slider includes a tensioning block and a sliding block. The positioning seat is provided with a limiting groove. The sliding block is slidably connected in the limiting groove. An clearance groove is provided above the limiting groove to accommodate the sliding of the tensioning block. The width of the sliding block is greater than the width of the clearance groove.

[0013] A processing method includes the following steps: S1. Install the multi-station seat on the rotary chuck and fix it with the tailstock pin; S2. Install the workpiece fixing components at each processing station; S3. Connect the machined part to the workpiece fixing assembly; S4. Machining the end face features of the workpiece; after machining, rotating the chuck 90° to machine one side feature; after machining, rotating the chuck 180° to machine the other side feature.

[0014] In step S3, the workpiece is placed on the positioning seat and initially engaged with the tensioning slider; by rotating the tensioning rod, the tensioning cone abuts against the tensioning slope and pushes the tensioning slider to radially displace and squeeze the workpiece.

[0015] The beneficial effects of this invention are as follows: (1) The end face and side position of the workpiece can be changed by rotating the chuck alone, avoiding the tedious process of multiple positioning and ensuring uniform machining accuracy; (2) It can process multiple workpieces simultaneously, thereby improving processing efficiency and reducing the number of positioning steps. (3) It can adapt to the workpiece of the machining and fix the limit to ensure the uniform positioning accuracy of the machining. Attached Figure Description

[0016] Figure 1 This is an isometric view of the present invention.

[0017] Figure 2 This is an installation diagram of the present invention.

[0018] Figure 3 This is the first isometric view of the multi-station base in this invention.

[0019] Figure 4 This is the second isometric view of the multi-station base in this invention.

[0020] Figure 5 This is an isometric view of the quick-release pad in this invention.

[0021] Figure 6 This is the first sectional view of Embodiment 2.

[0022] Figure 7 This is the second sectional view of Embodiment 2.

[0023] Figure 8 yes Figure 6 A magnified view of a portion of point A in the middle.

[0024] In the picture: 1. Rotary chuck; 2. Tailstock tip; 3. Multi-station base, 31. Machining station, 32. Mounting slot, 33. Clamping rod, 34. Center hole; 4. Workpiece fixing assembly, 41. Positioning seat, 42. Screw, 43. Fixing end, 44. Quick release pad, 45. Locking nut, 46. Quick release notch, 47. Hard disc, 48. Flexible plastic disc; 5 machined parts; 6 tensioning lever, 61 tensioning cone; 71 Tensioning slider, 72 Tensioning inclined plane, 73 Compression spring, 74 Tensioning block, 75 Sliding block, 76 Limiting groove, 77 Clearance groove. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1:

[0027] like Figure 1 , Figure 2As shown, a multi-workpiece synchronous processing device includes a multi-station base 3 connected to a rotary chuck 1. The multi-station base 3 is provided with a plurality of processing stations 31. The processing stations 31 are provided with workpiece fixing components 4. The workpiece fixing components 4 are connected to the processing parts 5. Each processing station 31 is arranged along the rotation axis of the rotary chuck 1. The axis of the processing parts 5 is perpendicular to the rotation axis of the rotary chuck 1. In this embodiment, the rotary chuck 1 can be connected to a multi-station base 3, which is provided with multiple machining stations 31. The specific number of machining stations 31 can be adjusted according to actual usage requirements. This embodiment uses four machining stations 31 as an example. Each machining station 31 is located on the same surface of the multi-station base 3. The workpiece 5 in this embodiment has a cylindrical structure. A workpiece fixing component 4 is provided on the machining station 31, which can be fixedly connected to the workpiece 5. The workpiece fixing component 4 is connected to the machining station 31, and there is a fixed connection between the workpiece fixing component 4 and the machining station 31, so that the workpiece 5 can be fixed on the machining station 31. After the workpiece 5 is fixed on the machining station 31, its axial direction is perpendicular to that of the rotary chuck 1. This embodiment eliminates the prior art's arrangement where the workpiece 5 and the rotary chuck 1's axis coincide. This allows the multi-station base 3 to rotate around the axis of the rotary chuck 1 during rotation, causing the axis of the workpiece 5 to rotate. During this rotation, the end face and two sides of the workpiece 5 cyclically switch positions. This allows the workpiece 5 to switch positions by rotating the rotary chuck 1 without changing its installation and positioning, avoiding repeated disassembly and improving processing efficiency and positioning accuracy. Furthermore, by setting multiple workpieces 5 on the multi-station base 3, all workpieces 5 on the multi-station base 3 can be processed after a single rotation, further improving processing efficiency and ensuring consistent positioning accuracy for each workpiece 5.

[0028] like Figure 2As shown, the workpiece fixing assembly 4 includes a positioning seat 41, a screw 42 connected to the positioning seat 41, and a fixing end 43 that can pass through the workpiece 5. A quick-release pad 44 is connected to the fixing end 43, and a locking nut 45 located on the side of the quick-release pad 44 away from the positioning seat 41 is connected to the screw 42. The workpiece fixing assembly 4 includes a positioning seat 41, which is connected to the processing station 31. In this embodiment, the positioning seat 41 has a disc-shaped structure with a through hole. The processing station 31 has a screw hole. After the positioning seat 41 is connected to the processing station 31, the through hole and the screw hole are connected by bolts to fix the positioning seat 41 to the processing station 31. In this embodiment, the processing station 31 has a circular groove structure. The circular groove structure can engage with the disc structure of the positioning seat 41, thereby forming a limiting constraint on the positioning seat 41, improving the connection convenience of the positioning seat 41, and ensuring the structural stability of the positioning seat 41. The positioning seat 41 is provided with a disc-shaped protrusion structure. In this embodiment, the processing position is a cylindrical structure. The disc-shaped protrusion structure can engage and connect with the cylindrical processing part 5, thereby ensuring the initial positioning of the processing part 5 and limiting the radial direction of the processing part 5 to improve the structural stability of the processing part 5. A screw 42 is connected to the positioning plate. Both ends of the screw 42 are threaded. A screw hole is located at the center of the positioning plate. One end of the screw 42 can be threaded into the screw hole at the center of the positioning plate. The other end of the screw 42 is a fixed end 43. The screw 42 passes through the workpiece 5, so that the fixed end 43 is exposed above the workpiece 5. A locking nut 45 is connected to the fixed end. A quick-release pad 44 is also connected to the screw 42. The quick-release pad 44 is located above the workpiece 5 and below the locking nut 45. The quick-release pad 44 is fastened by the locking nut and abuts against the workpiece 5. The quick-release pad 44 cooperates with the positioning plate to limit the axis of the workpiece 5 and fix the workpiece 5 on the corresponding processing station 31, ensuring the connection stability of the workpiece 5.

[0029] like Figure 2 , Figure 5As shown, the quick-release pad 44 is provided with a quick-release notch 46. A quick-release notch 46 is provided on the quick-release pad 44. The quick-release notch 46 is a through groove on the quick-release pad 44, extending from the center point of the quick-release pad 44 to the edge. This allows the quick-release pad 44 to be directly removed from the screw 42 in the radial direction when only the locking nut 45 is loosened without complete removal, thus achieving a quick disassembly effect. Furthermore, the size of the locking nut 45 is set to be smaller than the through hole size of the workpiece 5. This allows the workpiece 5 to be directly removed along the axis of the screw 42 after the quick-release pad 44 is detached from the screw 42 without completely removing the locking nut 45, thus achieving a quick replacement of the workpiece 5. After replacing and installing the new workpiece 5, the quick-release pad 44 can be placed directly between the workpiece 5 and the locking nut 45, and then the locking nut 45 can be tightened. The quick-release pad 44 secures and limits the workpiece 5, improving the smoothness and work efficiency during use.

[0030] like Figure 5 As shown, the quick-release gasket includes a stacked rigid disc 47 and a flexible plastic disc 48, with the flexible plastic disc 48 abutting against the workpiece 5. The quick-release gasket has a two-layer structure, consisting of a rigid disc 47 and a flexible plastic disc 48. The rigid disc 47 is made of a harder material, while the flexible plastic disc 48 is made of a hard plastic material with certain elasticity. This allows for effective clamping of the workpiece 5 while avoiding damage to it, while the rigid disc 47 effectively transmits the clamping force of the locking nut.

[0031] like Figure 3 As shown, a mounting groove 32 is provided on the processing station 31, and the positioning seat 41 is engaged in the mounting groove 32. The shape of the mounting groove 32 on the processing station 31 is adapted to the outer diameter shape of the positioning seat 41, so that the positioning seat 41 can be engaged in the mounting groove. The mounting groove 32 can form a preliminary positioning constraint on the positioning seat 41, thereby ensuring the accurate placement of the positioning seat 41 and improving the assembly efficiency.

[0032] like Figure 2 , Figure 4 As shown, the multi-station base 3 includes a clamping rod 33 and a central hole 34 disposed at its ends. A rotating chuck 1 clamps the clamping rod 33, and the central hole 34 abuts against the tailstock tip 2. The clamping rod 33 and the central hole 34 are respectively disposed at both ends of the multi-station base 3. The clamping rod 33 is connected to the rotating chuck 1, and the central hole 34 abuts against the tailstock tip 2, thereby achieving fixed and limiting constraints on both ends of the multi-station base 3 and ensuring the fixed stability of the multi-station base 3.

[0033] Example 2:

[0034] like Figure 6 , Figure 7 , Figure 8 As shown, a multi-workpiece synchronous processing device includes a multi-station base 3 connected to a rotary chuck 1. The multi-station base 3 has several processing stations 31, and each processing station 31 has a workpiece fixing assembly 4 connected to a workpiece 5. Each processing station 31 is arranged along the rotation axis of the rotary chuck 1, and the axis of the workpiece 5 is perpendicular to the rotation axis of the rotary chuck 1. The workpiece fixing assembly 4 includes a positioning seat 41, on which a screw 42 is connected. The screw 42 includes a fixed end 43 that can pass through the workpiece 5, and a quick-release pad 44 is connected to the fixed end 43. A locking nut 45 is connected to the screw 42 on the side of the quick-release pad 44 away from the positioning seat 41. The quick-release pad 44 has a quick-release notch 46. The quick-release pad includes stacked hard disks 47 and elastic plastic disks 48, with the elastic plastic disks 48 abutting against the workpiece 5. A mounting groove 32 is provided on the machining station 31, and a positioning seat 41 is engaged in the mounting groove 32. The multi-station seat 3 includes a clamping rod 33 and a center hole 34 at the end. The rotating chuck 1 clamps the clamping rod 33, and the center hole 34 abuts against the tailstock tip 2. A tensioning rotating rod 6 is threadedly connected to the side of the multi-station seat 3 away from the machining station 31. A tensioning cone 61 is provided on the side of the tensioning rotating rod 6 near the machining station 31. The workpiece fixing assembly 4 includes a positioning seat 41. Several tensioning sliders 71 that engage with the workpiece 5 are slidably connected to the positioning seat 41. The tensioning sliders 71 include a tensioning inclined surface 72 that abuts against the tensioning cone 61. A compression spring 73 is provided between the tensioning sliders 71 and the fixed outer plate.

[0035] Due to differences in production processes and the existence of processing errors, the inner walls of the processed parts 5 will have certain differences. Although they can all be engaged and connected with the positioning seat 41, it is impossible to achieve a uniform tightness of each processed part 5 or to ensure that each processed part 5 can obtain a high degree of tightness constraint. Therefore, if the inner wall processing errors between each processed part 5 have not been corrected, the positioning of each processed part 5 will be incorrect, which will affect the processing of the outer wall end face and side.

[0036] To address the aforementioned issues, this embodiment includes a tensioning rod 6 at one end of the multi-station base 3. The tensioning rod 6 is rotatably connected to the multi-station base 3 and is threaded, allowing the tensioning rod 6 to rotate and cause the tensioning cone 61 to rise and fall. The end of the tensioning rod 6 furthest from the tensioning cone 61 is located on the side of the multi-station base 3 furthest from the machining station 31. Specifically, when the machining station 31 is facing upwards, the tensioning rod 6 is located at the bottom of the machining station 31. The tensioning cone 61 has an inclined conical surface, while the positioning seat 41... The upper sliding connection is a tensioning slider 71, which is arranged in a ring, so that when the tensioning slider 71 expands outward, it can generate a relatively uniform extrusion force on the inner wall of the workpiece 5. A tensioning inclined surface 72 is provided on the tensioning slider 71, which fits against the tensioning cone 61. Therefore, in order to ensure that the tensioning cone 61 can fit evenly against all the tensioning inclined surfaces 72, a gap is set between each tensioning slider 71 of the positioning plate, leaving the central area empty so that the tensioning cone 61 can pass through. By positioning the tensioning rod 6 on the other side of the multi-station seat 3, after the workpiece 5 is placed on the positioning seat 41, the tensioning rod 6 can be rotated on the opposite side to drive the tensioning slider 71 to come close to the inner wall of the workpiece 5. The tightness of the fit between the tensioning slider 71 and the workpiece 5 can be controlled by controlling the torque of the tensioning rod 6, thereby ensuring the uniform fastening of each workpiece 5 on the positioning seat 41. Furthermore, since the tensioning rod 6 is positioned on the opposite side of the multi-station seat 3, the situation where the positioning of the workpiece 5 interferes with the tensioning slider 71 due to the workpiece 5 being installed first can be avoided. A compression spring 73 is provided between the tensioning slider 71 and the limiting groove 76. When disassembling the workpiece 5, the tensioning rod 6 is rotated in the opposite direction, causing the tensioning cone 61 to move away from the tensioning inclined surface 72. Driven by the compression spring 73, the tensioning slider 71 can be reset towards the center, thereby separating the tensioning slider 71 from the inner wall of the workpiece 5 and preventing the workpiece 5 from getting stuck when it is removed from the positioning seat 41.

[0037] The tensioning slider 71 includes a tensioning block 74 and a sliding block 75. A limiting groove 76 is provided on the positioning seat 41. The sliding block 75 is slidably connected in the limiting groove 76. An avoidance groove 77 is provided above the limiting groove 76 to accommodate the sliding of the tensioning block 74. The width of the sliding block 75 is greater than the width of the avoidance groove 77. The tensioning block 74 of the tensioning slider 71 is configured with an arc-shaped structure on the side near the inner wall of the workpiece 5. Preferably, a hard plastic of elastic material is provided on the arc surface, so that it can better fit the inner wall of the workpiece 5 and can adaptively fit and compress, avoiding the inability to achieve surface fit due to diameter difference. The sliding block 75 is slidably connected in the limiting slide groove 76, wherein the limiting slide groove 76 has an inverted T-shaped structure and an avoidance groove 77 is provided on the limiting slide groove 76. The avoidance groove 77 is located at the top position of the limiting slide groove 76. The width of the avoidance groove 77 is smaller than the width of the limiting slide groove 76. The avoidance groove 77 can pass through the tensioning block but cannot pass through the sliding block 75, thereby forming a limiting constraint on the sliding block 75 and preventing the sliding block 75 from detaching from the limiting slide groove 76.

[0038] Example 3:

[0039] This embodiment discloses a processing method, including the following steps: S1. Install the multi-station seat 3 on the rotary chuck 1 and fix it with the tailstock pin 2; S2. Install the workpiece fixing assembly 4 on each processing station 31; S3. Connect the machined part 5 to the workpiece fixing assembly 4; S4. Machining the end face features of workpiece 5; after machining, rotating chuck 1 rotates 90° to machine one side feature; after machining, rotating chuck 1 rotates 180° to machine the other side feature. In this embodiment, each workpiece 5 is fixed on the multi-station base 3. Since the axis of the workpiece 5 is perpendicular to the rotation axis of the rotary chuck 1, the workpiece 5 can be rotated during the rotation of the rotary chuck 1, thereby changing the orientation of the end face and side face of the workpiece 5. By rotating 90°, it switches between the end face and one side face, and by rotating 180°, it switches between the two sides face. Thus, after the rotary chuck 1 is clamped on one side, the workpiece 5 can be changed by rotating the rotary chuck 1 alone. The multi-workpiece synchronous processing device in this embodiment includes a multi-station base 3 connected to the rotary chuck 1. The multi-station base 3 is provided with a plurality of processing stations 31. The processing stations 31 are provided with workpiece fixing components 4. The workpiece fixing components 4 are connected to the workpiece 5. Each processing station 31 is arranged along the rotation axis of the rotary chuck 1, and the axis of the workpiece 5 is perpendicular to the rotation axis of the rotary chuck 1. The workpiece fixing assembly 4 includes a positioning seat 41, a screw 42 connected to the positioning seat 41, the screw 42 including a fixed end 43 that can pass through the workpiece 5, a quick-release pad 44 connected to the fixed end 43, and a locking nut 45 connected to the screw 42 on the side of the quick-release pad 44 away from the positioning seat 41. The quick-release pad 44 is provided with a quick-release notch 46. The quick-release pad includes a stacked hard disk 47 and an elastic plastic disk 48, the elastic plastic disk 48 abutting against the workpiece 5. The machining station 31 is provided with a mounting groove 32, and the positioning seat 41 is engaged in the mounting groove 32. The multi-station seat 3 includes a clamping rod 33 and a center hole 34 provided at the end, the rotating chuck 1 clamps the clamping rod 33, and the center hole 34 abuts against the tailstock tip 2.

[0040] Example 4:

[0041] This embodiment discloses a processing method, including the following steps: S1. Install the multi-station seat 3 on the rotary chuck 1 and fix it with the tailstock pin 2; S2. Install the workpiece fixing assembly 4 on each processing station 31; S3. Connect the workpiece 5 to the workpiece fixing assembly 4; place the workpiece 5 on the positioning seat 41 and initially engage it with the tensioning slider 71; rotate the tensioning rod 6 to make the tensioning cone 61 abut against the tensioning inclined surface 72 and push the tensioning slider 71 to radially displace and squeeze the workpiece 5; S4. The end face features of the workpiece 5 are processed; after processing, the rotary chuck 1 rotates 90° to process one side feature; after processing, the rotary chuck 1 rotates 180° to process the other side feature. In this embodiment, each workpiece 5 is fixed on the multi-station base 3. Since the axis of the workpiece 5 is perpendicular to the rotation axis of the rotary chuck 1, the workpiece 5 can be rotated during the rotation of the rotary chuck 1, thereby changing the orientation of the end face and side. By rotating 90°, the workpiece 5 switches between the end face and one side, and by rotating 180°, it switches between the two sides. Thus, after clamping on one side of the rotary chuck 1, the orientation of the workpiece 5 can be changed only by rotating the rotary chuck 1, reducing processing steps and processes, and ensuring positioning accuracy. After the workpiece 5 is placed on the positioning seat 41, the rotation of the tensioning rod 6 can bring the tensioning slider 71 close to the inner wall of the workpiece 5, ensuring that each workpiece 5 on the multi-station base 3 can obtain a similar constraint positioning effect.

[0042] In this embodiment of the multi-workpiece synchronous processing device, in addition to the structure in embodiment 3, a tensioning rotating rod 6 is threadedly connected to the side of the multi-station base 3 away from the processing station 31, and a tensioning cone 61 is provided on the side of the tensioning rotating rod 6 near the processing station 31. The workpiece fixing assembly 4 includes a positioning seat 41, and a plurality of tensioning sliders 71 that engage with the processing parts 5 are slidably connected on the positioning seat 41. The tensioning sliders 71 include a tensioning inclined surface 72 that abuts against the tensioning cone 61, and a compression spring 73 is provided between the tensioning sliders 71 and the fixed outer plate.

[0043] In addition to the above embodiments, within the scope disclosed in the claims and specification of this invention, the technical features of this invention can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative effort. Therefore, these embodiments not described in detail in this invention should also be regarded as specific embodiments of this invention and within the protection scope of this invention.

Claims

1. A multi-workpiece synchronous processing device, characterized in that, The device includes a multi-station base connected to a rotary chuck, the multi-station base having a plurality of processing stations, each processing station having a workpiece fixing assembly connected to a workpiece, each processing station being arranged along the rotation axis of the rotary chuck, and the axis of the workpiece being perpendicular to the rotation axis of the rotary chuck.

2. The multi-workpiece synchronous processing device according to claim 1, characterized in that, The workpiece fixing assembly includes a positioning seat, a screw connected to the positioning seat, the screw including a fixed end that can pass through the workpiece, a quick-release pad connected to the fixed end, and a locking nut connected to the screw on the side of the quick-release pad away from the positioning seat.

3. The multi-workpiece synchronous processing device according to claim 2, characterized in that, The quick-release pad is provided with a quick-release notch.

4. The multi-workpiece synchronous processing device according to claim 2, characterized in that, The quick-release pad includes stacked rigid discs and elastic plastic discs, with the elastic plastic discs abutting against the workpiece.

5. A multi-workpiece synchronous processing device according to claim 2, characterized in that, The processing station is provided with a placement groove, and the positioning seat is engaged in the placement groove.

6. The multi-workpiece synchronous processing device according to claim 1, characterized in that, The multi-station seat includes a clamping rod at one end and a central hole. The rotating chuck clamps the clamping rod, and the central hole abuts against the tip of the tailstock.

7. A multi-workpiece synchronous processing device according to any one of claims 1-6, characterized in that, The multi-station base is threadedly connected to a tensioning rotating rod on the side away from the machining station. A tensioning cone is provided on the side of the tensioning rotating rod close to the machining station. The workpiece fixing assembly includes a positioning seat. Several tensioning sliders that engage with the machining parts are slidably connected to the positioning seat. Each tensioning slider includes a tensioning inclined surface that abuts against the tensioning cone. A compression spring is provided between the tensioning slider and the fixed outer plate.

8. A multi-workpiece synchronous processing device according to claim 7, characterized in that, The tensioning slider includes a tensioning block and a sliding block. The positioning seat is provided with a limiting groove. The sliding block is slidably connected in the limiting groove. An clearance groove is provided above the limiting groove to accommodate the sliding of the tensioning block. The width of the sliding block is greater than the width of the clearance groove.

9. A processing method using the multi-workpiece synchronous processing device according to any one of claims 1-8, characterized in that, It includes the following steps: S1. Install the multi-station seat on the rotary chuck and fix it with the tailstock pin; S2. Install the workpiece fixing components at each processing station; S3. Connect the machined part to the workpiece fixing assembly; S4. Machining the end face features of the workpiece; after machining, rotating the chuck 90° to machine one side feature; after machining, rotating the chuck 180° to machine the other side feature.

10. A processing method according to claim 9, characterized in that, In step S3, the workpiece is placed on the positioning seat and initially engaged with the tensioning slider; by rotating the tensioning rod, the tensioning cone abuts against the tensioning slope and pushes the tensioning slider to radially displace and squeeze the workpiece.

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