A multi-station piston milling process

Abstract

The application relates to a multi-station piston milling process, which comprises the following steps: S1, feeding; S1.1, placing a workpiece on a positioning block to realize horizontal positioning through a positioning groove on the positioning block; S1.2, inserting a positioning pin into a groove of the workpiece to realize circumferential positioning through cooperation between the positioning pin and the groove; in the process of fixing the workpiece, an upward thrust is generated on the workpiece through a supporting block, so that the inner wall of the groove on the workpiece abuts against the positioning pin, vertical positioning of the workpiece is realized, and the workpiece is clamped by the positioning block and the clamping block, horizontal positioning and fixing are realized, the machining precision of the workpiece is improved, in addition, the workpiece is adsorbed through an adsorption hole during workpiece machining, deviation of the workpiece during machining is avoided, the machining precision of the workpiece is further improved, and finally, the workpiece is adsorbed through the adsorption hole on the clamping block after workpiece machining, the workpiece is moved out of the positioning groove along with the clamping block, and the workpiece unloading is facilitated.

Description

Technical Field

[0001] This invention relates to a multi-station piston milling process, belonging to the field of milling technology. Background Technology

[0002] Pistons are reciprocating components in the cylinder block of automobile engines. Their shape is related to the type of combustion chamber used. For example, the shape, position, and size of diesel engine pistons must be adapted to the requirements of mixture formation and combustion in diesel engines. Therefore, the top of the piston is often provided with various pits and protrusions. The top of the piston is generally milled during the manufacturing process. During the milling process, the piston needs to be clamped by a clamping device.

[0003] Chinese utility model patent CN220278997U discloses a pneumatic three-jaw clamping mechanism, belonging to the field of lathe fixture technology. This utility model includes a mounting base plate, three jaws, and a rotating disk. The three jaws are arranged in a triangular pattern and are fixedly connected to connecting seats. The mounting base plate has slide rails that are slidably connected to each connecting seat, with one end of each slide rail converging at the clamping center point. The rotating disk is rotatably connected to the mounting base plate and positioned at the clamping center point. Connecting rods are rotatably connected between the rotating disk and each connecting seat. A cylinder is fixedly connected to the mounting base plate via a cylinder frame, and a connecting member is fixedly connected to the cylinder piston rod, with the connecting member fixedly connected to one of the connecting seats. This utility model uses a pneumatic linkage principle for clamping, allowing for fast jaw movement and rapid clamping of the workpiece, resulting in high clamping efficiency and improved production efficiency. However, in existing technologies, vertical workpiece positioning is not possible, severely affecting the machining accuracy of the parts.

[0004] Therefore, a multi-station piston milling process is needed to improve machining accuracy. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a multi-station piston milling process to overcome the shortcomings of the prior art and improve machining accuracy.

[0006] The technical solution adopted by the present invention to solve the above problems is: a multi-station piston milling process, comprising the following steps:

[0007] S1. Loading materials;

[0008] S1.1 Place the workpiece on the positioning block and achieve horizontal positioning through the positioning groove on the positioning block;

[0009] S1.2 The locating pin is inserted into the groove of the workpiece, and the circumferential positioning of the workpiece is achieved through the cooperation between the locating pin and the groove.

[0010] S1.3. The workpiece is positioned vertically by applying an upward thrust to the workpiece through the support components.

[0011] S1.4. The workpiece is clamped and fixed by the clamping assembly;

[0012] S1.41. The clamping rod is driven to rotate by the clamping cylinder, and the clamping rod drives the clamping block to rotate. When the clamping block comes into contact with the workpiece and clamps the workpiece, the workpiece blocks the adsorption hole.

[0013] S1.42. As the clamping rod continues to rotate, the drive support assembly stops applying an upward thrust to the workpiece;

[0014] S1.5. The positioning pin is moved by the positioning cylinder, so that the positioning pin moves out of the groove and makes room for the workpiece to be processed.

[0015] S1.6 By moving the positioning pin, the pressure regulating component reduces the air pressure inside the adsorption hole, causing the adsorption hole to adsorb the workpiece and improving the workpiece's fixing stability.

[0016] S2, Milling;

[0017] S3, unloading.

[0018] 2. The multi-station piston milling process according to claim 1, characterized in that: step S3 includes the following steps:

[0019] S3.1 The clamping cylinder drives the clamping rod to rotate in the opposite direction, and the reverse rotation of the clamping rod drives the clamping block to rotate in the opposite direction.

[0020] S3.2 During the reverse rotation of the clamping block, the workpiece is attracted by the suction hole, causing the clamping block to move the workpiece out of the groove of the positioning block.

[0021] S3.3 Manually remove the workpiece from the clamping block. The pressure regulating component will automatically reset, and the air pressure in the adsorption hole will return to atmospheric pressure.

[0022] A multi-station piston milling pneumatic fixture includes at least one fixing mechanism. The fixing mechanism includes a base and a vertical plate. The vertical plate is fixedly mounted on the base. A positioning block is fixedly mounted on the vertical plate. A positioning groove is provided on the front side of the positioning block. A positioning pin is passed through the vertical plate. The positioning pin is driven to move by a positioning cylinder. A support assembly and a clamping assembly are provided on the vertical plate.

[0023] The clamping assembly includes a clamping rod disposed on the front side of the positioning block. One end of the clamping rod is driven to move back and forth by a clamping cylinder. The rear side of the other end of the clamping rod is provided with an indentation, in which a clamping block is disposed. A moving rod is fixedly disposed on the rear side of the clamping block. The moving rod is slidably connected to the clamping rod. A moving rod is fixedly disposed on the rear side of the clamping block. The moving rod is parallel to the front-back direction and passes through the clamping rod. A first spring is sleeved on the moving rod. The first spring is located on the front side of the clamping rod. One end of the first spring is connected to the clamping rod, and the other end of the first spring is connected to the front end of the moving rod. A connecting seat is fixedly disposed on the vertical plate. The connecting seat is hinged to the clamping rod through a connecting rod. The connecting seat and the connecting rod are both located between the clamping block and the clamping cylinder. An adsorption hole is provided on the rear side of the clamping block. A pressure regulating assembly is provided on the clamping block. The pressure regulating assembly controls the air pressure in the adsorption hole by moving the positioning pin.

[0024] The support assembly is located below the positioning block. The support assembly includes a support block, a lifting rod, a second spring, a support plate, and rollers. The lifting rod is vertically oriented, the support block is fixedly mounted on the top of the lifting rod, and the support plate is fixedly mounted on the vertical plate. The lifting rod passes through the support plate. The second spring is sleeved on the lifting rod and is located below the support plate. One end of the second spring is connected to the bottom end of the lifting rod, and the other end of the second spring is connected to the support plate. The support block is shaped like a frustum of a cone, with its smaller diameter end facing upwards. The rollers are fixedly mounted on the clamping rod.

[0025] Preferably, the rear side of the clamping block is an arc surface.

[0026] Preferably, the pressure regulating assembly includes a blind hole located at the top of the clamping block. A connecting tube is inserted into the blind hole, and the top end of the connecting tube is sealed. The connecting tube is located in front of the positioning pin, and a pressure regulating tube is located in front of the connecting tube. The cavity inside the pressure regulating tube, the cavity inside the connecting tube, the cavity inside the blind hole, and the cavity inside the adsorption hole form a pressure regulating air passage. A magnetic disk is installed inside the connecting tube. The magnetic disk slides and is sealed to the pressure regulating tube. The magnetic disk is connected to the inner wall of the pressure regulating tube via a third spring.

[0027] Preferably, a connecting ring is fixedly installed inside the pressure regulating tube. The connecting ring is located behind the magnetic disk, and the third spring is located between the connecting ring and the magnetic disk. The two ends of the third spring are respectively connected to the connecting ring and the magnetic disk.

[0028] Preferably, the front end of the pressure regulating tube is fixedly mounted on the limiting block.

[0029] Preferably, the locating pin is made of iron.

[0030] Preferably, the positioning groove is V-shaped.

[0031] Preferably, there are seven fixing mechanisms, which are distributed from left to right.

[0032] Compared with the prior art, the advantages of the present invention are as follows:

[0033] This invention discloses a multi-station piston milling process. During the workpiece fixing process, the support block generates an upward thrust on the workpiece, causing the inner wall of the groove on the workpiece to abut against the positioning pin, thus achieving vertical positioning of the workpiece. The positioning block and clamping block clamp the workpiece, achieving horizontal positioning and fixing, thereby improving the machining accuracy of the workpiece. In addition, during workpiece machining, the workpiece is also adsorbed through the suction hole to prevent workpiece displacement during machining, further improving the machining accuracy of the workpiece. After the workpiece is machined, the workpiece is adsorbed through the suction hole on the clamping block, allowing the workpiece to move out of the positioning groove along with the clamping block, facilitating the unloading of the workpiece. Attached Figure Description

[0034] Figure 1 This is a perspective view of a multi-station piston milling pneumatic tooling according to the present invention;

[0035] Figure 2 A three-dimensional view of the fixed mechanism;

[0036] Figure 3 This is the front view of the fixed mechanism;

[0037] Figure 4 Left view of the fixed mechanism;

[0038] Figure 5 This is a top view of the fixed mechanism;

[0039] Figure 6 A 3D view of the locating pin;

[0040] Figure 7 A 3D view of the positioning block;

[0041] Figure 8 A 3D view of the workpiece;

[0042] Figure 9 A 3D view of the clamping components;

[0043] Figure 10 The left view of the clamping component;

[0044] Figure 11 This is a 3D view of the adsorption component;

[0045] Figure 12 This is a cross-sectional view of the adsorption component.

[0046] in:

[0047] Fixing mechanism 1, workpiece 2, groove 3;

[0048] 11. Base, 12. Vertical plate, 13. Positioning block, 14. Positioning groove, 15. Positioning pin, 16. Positioning cylinder, 17. Support assembly, 18. Clamping assembly, 19. Pressure regulating assembly.

[0049] Support block 171, lifting rod 172, second spring 173, support plate 174, roller 175;

[0050] Clamping rod 181, clamping cylinder 182, clamping block 183, moving rod 184, first spring 185, connecting seat 186, connecting rod 187, suction hole 188;

[0051] Blind hole 191, connecting pipe 192, pressure regulating pipe 193, magnetic disk 194, third spring 195, connecting ring 196, limit block 197. Detailed Implementation

[0052] like Figure 1-12 As shown, a multi-station piston milling process in this embodiment includes the following steps:

[0053] S1. Loading materials;

[0054] S1.1 Place the workpiece 2 on the positioning block 13 and achieve horizontal positioning through the positioning groove 14 on the positioning block 13;

[0055] S1.2, The positioning pin 15 is inserted into the groove 3 of the workpiece 2, and the circumferential positioning of the workpiece 2 is achieved through the cooperation between the positioning pin 15 and the groove 3.

[0056] S1.3. The support assembly 17 applies an upward thrust to the workpiece 2 to achieve the vertical positioning of the workpiece 2.

[0057] S1.4 The workpiece 2 is clamped and fixed by the clamping assembly 18;

[0058] S1.41. The clamping cylinder 182 drives the clamping rod 181 to rotate, and the clamping rod 181 drives the clamping block 183 to rotate. When the clamping block 183 abuts against the workpiece 2 and clamps the workpiece 2, the workpiece 2 blocks the adsorption hole 188.

[0059] S1.42. As the clamping rod 181 continues to rotate, the drive support assembly 17 stops applying an upward thrust to the workpiece 2.

[0060] S1.5. The positioning cylinder 16 drives the positioning pin 15 to move, so that the positioning pin 15 moves out of the groove 3, making room for the workpiece 2 to be processed.

[0061] S1.6 By moving the positioning pin 15, the pressure regulating component 19 reduces the air pressure inside the adsorption hole 188, so that the adsorption hole 188 adsorbs the workpiece 2 and improves the fixation stability of the workpiece 2.

[0062] S2, Milling;

[0063] S3, unloading;

[0064] S3.1 The clamping cylinder 182 drives the clamping rod 181 to rotate in the opposite direction, and the reverse rotation of the clamping rod 181 drives the clamping block 183 to rotate in the opposite direction.

[0065] S3.2 During the reverse rotation of the clamping block 183, the workpiece 2 is attracted by the adsorption hole 188, causing the clamping block 183 to move the workpiece 2 out of the groove 3 of the positioning block 13.

[0066] S3.3 Manually remove workpiece 2 from clamping block 183. Pressure regulating component 19 automatically resets, and air pressure in adsorption hole 188 returns to atmospheric pressure.

[0067] A multi-station piston milling pneumatic fixture includes seven fixing mechanisms 1, distributed from left to right. Each fixing mechanism 1 includes a base 11 and a vertical plate 12. The vertical plate 12 is fixedly mounted on the top of the base 11. A positioning block 13 is fixedly mounted on the front side of the vertical plate 12. A positioning groove 14 is provided on the front side of the positioning block 13. The positioning groove 14 is V-shaped and is used to place a workpiece 2. The workpiece 2 is cylindrical and vertically positioned. A recess is provided on the top of the workpiece 2. The groove 3 has a positioning pin 15 passing through the vertical plate 12. The positioning pin 15 is parallel to the front-back direction and is inserted into the groove 3. The positioning pin 15 abuts against the bottom of the groove 3. The positioning pin 15 is driven to move axially by the positioning cylinder 16. The cylinder body of the positioning cylinder 16 is fixedly mounted on the vertical plate 12. The vertical plate 12 is provided with a support assembly 17 and a clamping assembly 18. The support assembly 17 is used to apply an upward pushing force to the workpiece 2, and the clamping assembly 18 is used to clamp the workpiece 2.

[0068] The clamping assembly 18 includes a clamping rod 181 and a clamping cylinder 182. The clamping rod 181 is vertically positioned on the front side of the positioning block 13. The cylinder body of the clamping cylinder 182 is fixedly mounted on the vertical plate 12. The piston end of the clamping cylinder 182 is hinged to the bottom end of the clamping rod 181. The rear side of the top end of the clamping rod 181 is concave, and a clamping block 183 is disposed within the concave area. The rear side of the clamping block 183 is an arc surface that matches the workpiece 2. A moving rod 184 is fixedly mounted on the rear side of the clamping block 183. The moving rod 184 is parallel to the front-rear direction and passes through the clamping rod 181. A first... A spring 185 is located in front of the clamping rod 181. One end of the spring 185 is connected to the clamping rod 181, and the other end of the spring 185 is connected to the front end of the moving rod 184. A connecting seat 186 is fixedly provided on the vertical plate 12. The connecting seat 186 is hinged to the clamping rod 181 through a connecting rod 187. The connecting seat 186 and the connecting rod 187 are both located between the clamping block 183 and the clamping cylinder 182. An adsorption hole 188 is provided on the rear side of the clamping block 183. A pressure regulating component 19 is provided on the clamping block 183. The pressure regulating component 19 controls the air pressure in the adsorption hole 188 by moving the positioning pin 15.

[0069] The support assembly 17 is located below the positioning block 13. The support assembly 17 includes a support block 171, a lifting rod 172, a second spring 173, a support plate 174, and a roller 175. The lifting rod 172 is vertically arranged. The support block 171 is fixedly arranged at the top of the lifting rod 172. The support plate 174 is fixedly arranged on the vertical plate 12. The lifting rod 172 passes through the support plate 174. The second spring 173 is sleeved on the lifting rod 172 and is located below the support plate 174. One end of the second spring 173 is connected to the bottom end of the lifting rod 172, and the other end of the second spring 173 is connected to the support plate 174. The support block 171 is shaped like a frustum, with its smaller diameter end facing upwards. The roller 175 is fixedly arranged on the clamping rod 181.

[0070] The pressure regulating assembly 19 includes a blind hole 191, which is located on the top of the clamping block 183. A connecting tube 192 is inserted into the blind hole 191, and the top end of the connecting tube 192 is sealed. The connecting tube 192 is located in front of the positioning pin 15. A pressure regulating tube 193 is located in front of the connecting tube 192. The cavity inside the pressure regulating tube 193, the cavity inside the connecting tube 192, the cavity inside the blind hole 191, and the cavity inside the adsorption hole 188 form a pressure regulating air passage. A magnetic disk 194 is located inside the connecting tube 192. The magnetic disk 194 is slidably and sealingly connected to the pressure regulating tube 193. The magnetic disk 194 is connected to the inner wall of the pressure regulating tube 193 through a third spring 195.

[0071] A connecting ring 196 is fixedly installed inside the pressure regulating tube 193. The connecting ring 196 is located behind the magnetic disk 194. The third spring 195 is located between the connecting ring 196 and the magnetic disk 194. The two ends of the third spring 195 are respectively connected to the connecting ring 196 and the magnetic disk 194.

[0072] The front end of the voltage regulating tube 193 is fixedly installed in the limiting block 197. The function of the limiting block 197 is to prevent the magnetic disk 194 from moving out of the voltage regulating tube 193.

[0073] The positioning pin 15 is made of iron;

[0074] Working principle:

[0075] Before loading, the clamping rod 181 is driven by the clamping cylinder 182 to move the bottom end of the clamping rod 181 backward. Since the clamping rod 181 is hinged to the clamping seat through the connecting rod 187, the top end of the clamping rod 181 rotates forward to open the clamping rod 181. During the rotation of the clamping rod 181, the roller 175 is driven to rotate synchronously, so that the roller 175 is separated from the support block 171. At this time, a gap is provided between the side of the clamping block 183 near the moving rod 184 and the clamping rod 181.

[0076] During loading, the workpiece 2 is manually placed vertically in the positioning groove 14 and abuts against the inner wall of the positioning groove 14, and the positioning pin 15 is inserted into the groove 3. At the same time, the bottom of the workpiece 2 abuts against the top of the support block 171, and the support block 171 drives the lifting rod 172 to descend, thereby deforming the second spring 173. After the workpiece 2 is released, the elastic action of the second spring 173 causes the lifting rod 172 to drive the support block 171 to move upward. That is, the support block 171 generates an upward pushing force on the workpiece 2, so that the bottom of the groove 3 abuts against the positioning pin 15. In this way, the vertical positioning of the workpiece 2 is achieved.

[0077] Subsequently, the clamping cylinder 182 drives the bottom end of the clamping rod 181 to move forward, that is, the top end of the clamping rod 181 moves backward. During the backward movement of the top end of the clamping rod 181, the clamping block 183 preferentially abuts against the workpiece 2. As the clamping rod 181 continues to rotate, the gap between the side of the clamping block 183 near the moving rod 184 and the clamping rod 181 decreases, that is, relative movement occurs between the moving rod 184 and the clamping rod 181, causing the first spring 185 to deform. Through the elastic action of the first spring 185, the moving rod 184 drives the clamping block 181 to move backward. The clamping block 183 applies a backward pushing force to the workpiece 2. As the clamping rod 181 continues to rotate, the roller 175 abuts against the outer peripheral wall of the support block 171, and the roller 175 pushes the support block 171 downward, causing the support block 171 to separate from the workpiece 2. That is, the support block 171 stops applying an upward pushing force to the workpiece 2, so as to avoid the workpiece 2 being subjected to an upward displacement when the positioning pin 15 separates from the workpiece 2. When the support block 171 separates from the workpiece 2, the clamping force generated by the clamping block 183 clamps the workpiece 2, that is, the workpiece 2 remains stationary.

[0078] When the clamping rod 181 rotates, causing the side of the clamping block 183 closest to the moving rod 184 to abut against the clamping rod 181, the clamping rod 181 stops rotating. Calculations show that at this point, the workpiece 2 blocks the suction hole 188. Therefore, during the rotation of the clamping rod 181, the following actions are performed sequentially:

[0079] The clamping block 183 has a reduced gap between the side of the moving rod 184 and the clamping rod 181, the roller 175 pushes the support block 171 to separate from the workpiece 2, and the side of the clamping block 183 near the moving rod 184 abuts against the clamping rod 181 and blocks the adsorption hole 188 with the workpiece 2.

[0080] In addition, during the rearward rotation of the top of the clamping rod 181, the distance between the magnetic disk 194 and the positioning pin 15 decreases, that is, the attraction between the magnetic disk 194 and the positioning pin 15 increases. When the attraction between the magnetic disk 194 and the positioning pin 15 is greater than the elastic effect of the third spring 195, the magnetic disk 194 moves towards the connecting pipe 192 in the pressure regulating pipe 193, and causes the third spring 195 to deform.

[0081] Next, the positioning cylinder 16 drives the positioning pin 15 to move, causing the positioning pin 15 to move out of the groove 3, making room for the workpiece 2 to be processed. At this time, the distance between the magnetic disk 194 and the positioning pin 15 increases. Through calculation, the attraction between the magnetic disk 194 and the positioning pin 15 is less than the elastic force of the third spring 195. That is, the third spring 195 causes the magnetic disk 194 to move away from the connecting pipe 192, which reduces the air pressure in the adsorption hole 188, allowing the adsorption hole 188 to adsorb the workpiece 2 and improve the stability of the workpiece 2.

[0082] Next, milling is performed on workpiece 2;

[0083] After milling is completed, the bottom end of the clamping rod 181 is driven to rotate backward by the clamping cylinder 182, that is, the top end of the clamping rod 181 rotates forward. The clamping block 183 moves relative to the clamping rod 181 through the elastic action of the first spring 185, and the relative position between the clamping blocks 183 is reset. The workpiece 2 is attracted by the adsorption hole 188, and the clamping block 183 moves the workpiece 2 out of the groove 3 of the positioning block 13. The workpiece 2 is manually removed from the clamping block 183, the air pressure in the adsorption hole 188 is restored to atmospheric pressure, the magnetic disk 194 moves in the pressure regulating pipe 193, and the relative position between the magnetic disk 194 and the connecting pipe 192 is reset.

[0084] In summary, during the process of fixing workpiece 2, the support block 171 generates an upward pushing force on workpiece 2, causing the inner wall of the groove 3 on workpiece 2 to abut against the positioning pin 15, thereby achieving vertical positioning of workpiece 2. The positioning block 13 and clamping block 183 clamp workpiece 2, thereby achieving horizontal positioning and fixing, which improves the machining accuracy of workpiece 2. In addition, during the machining of workpiece 2, the suction hole 188 is used to attract workpiece 2, preventing workpiece 2 from shifting during machining, which further improves the machining accuracy of workpiece 2. Furthermore, after the workpiece 2 is machined, the suction hole 188 on the clamping block 183 attracts workpiece 2, allowing workpiece 2 to move out of the positioning groove 14 along with the clamping block 183, which facilitates the unloading of workpiece 2.

[0085] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.

Claims

1. A multi-station piston milling process, characterized in that: The operation is carried out using a multi-station piston milling pneumatic fixture. The multi-station piston milling pneumatic fixture includes at least one fixing mechanism (1). The fixing mechanism (1) includes a base (11) and a vertical plate (12). The vertical plate (12) is fixedly mounted on the base (11). A positioning block (13) is fixedly mounted on the vertical plate (12). A positioning groove (14) is provided on the front side of the positioning block (13). A positioning pin (15) is passed through the vertical plate (12). The positioning pin (15) is driven to move by a positioning cylinder (16). A support assembly (17) and a clamping assembly (18) are provided on the vertical plate (12). The clamping assembly (18) includes a clamping rod (181), which is disposed on the front side of the positioning block (13). One end of the clamping rod (181) is driven to move back and forth by a clamping cylinder (182). The rear side of the other end of the clamping rod (181) is provided with an indentation, and a clamping block (183) is disposed in the indentation. A moving rod (184) is fixedly disposed on the rear side of the clamping block (183). The moving rod (184) is slidably connected to the clamping rod (181) back and forth. The moving rod (184) is parallel to the front and rear direction and passes through the clamping rod (181). A first spring (185) is sleeved on the moving rod (184). The first spring (185) is located in front of the clamping rod (181). One end of the first spring (185) is connected to the clamping rod (181), and the other end of the first spring (185) is connected to the front end of the moving rod (184). A connecting seat (186) is fixedly provided on the vertical plate (12). The connecting seat (186) is hinged to the clamping rod (181) through the connecting rod (187). The connecting seat (186) and the connecting rod (187) are both located between the clamping block (183) and the clamping cylinder (182). An adsorption hole (188) is provided on the rear side of the clamping block (183). A pressure regulating component (19) is provided on the clamping block (183). The pressure regulating component (19) controls the air pressure in the adsorption hole (188) by moving the positioning pin (15). The support assembly (17) is located below the positioning block (13). The support assembly (17) includes a support block (171), a lifting rod (172), a second spring (173), a support plate (174), and a roller (175). The lifting rod (172) is vertically arranged. The support block (171) is fixedly arranged at the top of the lifting rod (172). The support plate (174) is fixedly arranged on the vertical plate (12). The lifting rod (172) passes through the support plate (174). The second spring (173) is sleeved on the lifting rod (172). The second spring (173) is located below the support plate (174). One end of the second spring (173) is connected to the bottom end of the lifting rod (172), and the other end of the second spring (173) is connected to the support plate (174). The support block (171) is shaped like a frustum. The small diameter end of the support block (171) is arranged upward. The roller (175) is fixedly mounted on the clamping rod (181). The pressure regulating assembly (19) includes a blind hole (191) located on the top of the clamping block (183). A connecting tube (192) is inserted into the blind hole (191), and the top end of the connecting tube (192) is sealed. The connecting tube (192) is located in front of the positioning pin (15). A pressure regulating tube (193) is provided in front of the connecting tube (192). The cavity inside the pressure regulating tube (193), the cavity inside the connecting tube (192), the cavity inside the blind hole (191), and the cavity inside the adsorption hole (188) form a pressure regulating air passage. A magnetic disk (194) is provided inside the connecting tube (192). The magnetic disk (194) is slidably and sealedly connected to the pressure regulating tube (193). The magnetic disk (194) is connected to the inner wall of the pressure regulating tube (193) through a third spring (195). Specifically, the steps include the following: S1. Loading materials; S1.1 Place the workpiece (2) on the positioning block (13) and achieve horizontal positioning through the positioning groove (14) on the positioning block (13); S1.2, The positioning pin (15) is inserted into the groove (3) of the workpiece (2), and the circumferential positioning of the workpiece (2) is achieved through the cooperation between the positioning pin (15) and the groove (3); S1.

3. The support component (17) applies an upward thrust to the workpiece (2) to achieve the vertical positioning of the workpiece (2); S1.4 The workpiece (2) is clamped and fixed by the clamping assembly (18); S1.

41. The clamping cylinder (182) drives the clamping rod (181) to rotate, and the clamping rod (181) drives the clamping block (183) to rotate. When the clamping block (183) abuts against the workpiece (2) and clamps the workpiece (2), the workpiece (2) blocks the adsorption hole (188). S1.42 As the clamping rod (181) continues to rotate, the drive support assembly (17) stops applying an upward thrust to the workpiece (2); S1.

5. The positioning cylinder (16) drives the positioning pin (15) to move, so that the positioning pin (15) moves out of the groove (3) and makes room for the workpiece (2) to be processed. S1.6 By moving the positioning pin (15), the pressure regulating component (19) reduces the air pressure inside the adsorption hole (188), so that the adsorption hole (188) adsorbs the workpiece (2) and improves the fixation stability of the workpiece (2). S2, Milling; S3, unloading.

2. The multi-station piston milling process according to claim 1, characterized in that: Step S3 includes the following steps: S3.1 The clamping cylinder (182) drives the clamping rod (181) to rotate in the opposite direction, and the reverse rotation of the clamping rod (181) drives the clamping block (183) to rotate in the opposite direction. S3.2 During the reverse rotation of the clamping block (183), the workpiece (2) is attracted by the adsorption hole (188), causing the clamping block (183) to move the workpiece (2) out of the groove (3) of the positioning block (13). S3.3 Manually remove the workpiece (2) from the clamping block (183), the pressure regulating component (19) automatically resets, and the air pressure in the adsorption hole (188) returns to atmospheric pressure.

3. The multi-station piston milling process according to claim 1, characterized in that: The rear side of the clamping block (183) is an arc surface.

4. The multi-station piston milling process according to claim 1, characterized in that: A connecting ring (196) is fixedly installed inside the pressure regulating tube (193). The connecting ring (196) is located on the rear side of the magnetic disk (194). The third spring (195) is located between the connecting ring (196) and the magnetic disk (194). The two ends of the third spring (195) are connected to the connecting ring (196) and the magnetic disk (194) respectively.

5. The multi-station piston milling process according to claim 1, characterized in that: The front end of the pressure regulating tube (193) is fixedly installed on the limiting block (197).

6. The multi-station piston milling process according to claim 1, characterized in that: The positioning pin (15) is made of iron.

7. The multi-station piston milling process according to claim 1, characterized in that: The positioning groove (14) is V-shaped.

8. The multi-station piston milling process according to claim 1, characterized in that: There are seven fixing mechanisms (1), which are distributed from left to right.

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