Multi-station piston milling pneumatic tool

Abstract

The utility model relates to a multi-station piston milling pneumatic tool, which comprises at least one fixing mechanism, the fixing mechanism comprises a base and a vertical plate, the vertical plate is fixedly arranged on the base, a positioning block is fixedly arranged on the vertical plate, a positioning groove is arranged on the front side of the positioning block, a positioning pin is arranged on the vertical plate in a penetrating manner, and the positioning groove is arranged on the front side of the positioning block. The positioning pin is driven by a positioning air cylinder to move, and a supporting assembly and a clamping assembly are arranged on the vertical plate. In the workpiece fixing process, upward thrust is generated on the workpiece through the supporting block, so that the inner wall of the groove in the workpiece abuts against the positioning pin, vertical positioning of the workpiece is achieved, the workpiece is clamped through the positioning block and the clamping block, positioning and fixing in the horizontal direction are achieved, and the machining precision of the workpiece is improved; and the workpieces are adsorbed through the adsorption holes, so that the workpieces are prevented from deviating during machining, and the machining precision of the workpieces is further improved.

Description

Technical Field

[0001] The utility model relates to a multi-station piston milling pneumatic tooling, belonging to the technical field of milling. Background Art

[0002] The piston is a reciprocating component in the cylinder block of a car engine. Its shape is related to the selected combustion chamber form. For example, the shape, position and size of a diesel engine piston must be adapted to the mixture formation and combustion requirements of the diesel engine. 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, and during the milling process, the piston needs to be clamped by a clamping device.

[0003] The Chinese utility model patent with publication number CN220278997U discloses a pneumatic three-jaw clamping mechanism, which belongs to the technical field of lathe clamps. The utility model comprises a mounting base, three clamping jaws and a rotating disk. The three clamping jaws are distributed in a triangle shape. The clamping jaws are fixedly connected to a connecting seat. A slide rail that is slidably connected to the connecting seat in a one-to-one correspondence is fixedly connected to the mounting base, and one end of the three slide rails converges at a clamping center point; the rotating disk is rotatably connected to the mounting base, and the rotating disk is arranged at the clamping center point position, and a connecting rod is rotatably connected between the rotating disk and each connecting seat; a cylinder is fixedly connected to the mounting base through a cylinder frame, and a connecting piece is fixedly connected to the cylinder piston rod, and the connecting piece is fixedly connected to one of the connecting seats; the utility model adopts the pneumatic connecting rod principle for clamping, the clamping jaw moves quickly, can quickly clamp and fix the workpiece, has high efficiency in clamping the workpiece, and improves the production efficiency of the product. However, in the prior art, the workpiece cannot be positioned in the vertical direction, which seriously affects the machining accuracy of the parts.

[0004] Therefore, there is a need for a multi-station piston milling pneumatic tooling to improve machining accuracy. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, a multi-station piston milling pneumatic tooling is provided to improve the processing accuracy.

[0006] The technical solution adopted by the utility model to solve the above problems is: a multi-station piston milling pneumatic tooling, comprising at least one fixing mechanism, the fixing mechanism comprising a base and a vertical plate, the vertical plate is fixedly arranged on the base, a positioning block is fixedly arranged on the vertical plate, a positioning groove is arranged on the front side of the positioning block, a positioning pin is penetrated on the vertical plate, the positioning pin is driven to move by a positioning cylinder, and a supporting assembly and a clamping assembly are arranged on the vertical plate;

[0007] The clamping assembly comprises a clamping rod, which is arranged on the front side of the positioning block, and one end of the clamping rod is driven by the clamping cylinder to move forward and backward, and a recess is arranged on the rear side of the other end of the clamping rod, and a clamping block is arranged in the recess, and a moving rod is fixedly arranged on the rear side of the clamping block, and the moving rod is slidably connected with the clamping rod forward and backward, and a moving rod is fixedly arranged on the rear side of the clamping block, and the moving rod is parallel to the front and rear direction, and the moving rod passes through the clamping rod, and the moving rod is elastically connected to the clamping rod, and a connecting seat is fixedly arranged on the vertical plate, and the connecting seat is hinged with the clamping rod through a connecting rod, and the connecting seat and the connecting rod are both located between the clamping block and the clamping cylinder, and an adsorption hole is arranged on the rear side of the clamping block, and a pressure regulating assembly is arranged on the clamping block, and the pressure regulating assembly controls the air pressure in the adsorption hole through the movement of the positioning pin;

[0008] The support assembly is located below the positioning block, and the support assembly includes a support block, a lifting rod, a second spring, a support plate and a roller. The lifting rod is vertically arranged, the support block is fixedly arranged on the top end of the lifting rod, the support plate is fixedly arranged on the vertical plate, the lifting rod passes through the support plate, the second spring is sleeved on the lifting rod, the second spring is located below the support plate, one end of the second spring is connected to the bottom end of the lifting rod, the other end of the second spring is connected to the support plate, and the roller is fixedly arranged on the clamping rod.

[0009] Preferably, the rear side of the clamping block is a curved surface.

[0010] Preferably, the pressure regulating assembly includes a blind hole, which is arranged at the top of the clamping block, a connecting tube is inserted into the blind hole, the top end of the connecting tube is sealed, the connecting tube is located in front of the positioning pin, a pressure regulating tube is arranged on the front side of the connecting tube, the cavity in the pressure regulating tube, the cavity in the connecting tube, the cavity in the blind hole and the cavity in the adsorption hole form a pressure regulating airway, a magnetic disk is arranged in the connecting tube, the magnetic disk is slidably and sealingly connected to the pressure regulating tube, and the magnetic disk is connected to the inner wall of the pressure regulating tube through a third spring.

[0011] Preferably, a connecting ring is fixedly provided inside the voltage regulating tube, the connecting ring is located at the rear side of the magnetic disk, the third spring is located between the connecting ring and the magnetic disk, and both ends of the third spring are respectively connected to the connecting ring and the magnetic disk.

[0012] Preferably, the front end of the voltage regulating tube is fixedly arranged on a limit block.

[0013] Preferably, the positioning pin is made of iron.

[0014] Preferably, the positioning groove is V-shaped.

[0015] Preferably, seven fixing mechanisms are provided, and the seven fixing mechanisms are distributed from left to right.

[0016] Preferably, the support block is in the shape of a truncated cone, and the small diameter end of the support block is arranged to rise.

[0017] Preferably, a first spring is sleeved on the moving rod, the first spring is located at 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.

[0018] Compared with the prior art, the advantages of the utility model are:

[0019] The utility model discloses a multi-station piston milling pneumatic tooling. In the process of fixing the workpiece, an upward thrust is generated on the workpiece by a support block, so that the inner wall of the groove on the workpiece abuts against the positioning pin, thereby realizing the vertical positioning of the workpiece, and the positioning and fixing of the workpiece in the horizontal direction are realized by clamping the workpiece by the positioning block and the clamping block, thereby improving the processing accuracy of the workpiece. In addition, when the workpiece is processed, the workpiece is adsorbed through the adsorption holes to avoid the workpiece from being offset during processing, thereby further improving the processing accuracy of the workpiece. Secondly, after the workpiece is processed, the workpiece is adsorbed through the adsorption holes on the clamping block, so that the workpiece is moved out of the positioning groove along with the clamping block, thereby facilitating the unloading of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of a multi-station piston milling pneumatic tooling of the utility model;

[0021] Figure 2 is a three-dimensional diagram of the fixing mechanism;

[0022] Figure 3 It is the front view of the fixing mechanism;

[0023] Figure 4 It is the left side view of the fixing mechanism;

[0024] Figure 5 is a top view of the fixing mechanism;

[0025] Figure 6 is a three-dimensional diagram of a positioning pin;

[0026] Figure 7 A three-dimensional diagram of the positioning block;

[0027] Figure 8 A three-dimensional image of the workpiece;

[0028] Fig. 9 is a three-dimensional diagram of a clamping assembly;

[0029] Fig.10 It is the left side view of the clamping assembly;

[0030] Fig.11 A three-dimensional diagram of an adsorption component;

[0031] Fig.12 A cross-sectional view of the adsorption assembly.

[0032] in:

[0033] Fixing mechanism 1, workpiece 2, groove 3;

[0034] Base 11, vertical plate 12, positioning block 13, positioning groove 14, positioning pin 15, positioning cylinder 16, supporting assembly 17, clamping assembly 18, pressure regulating assembly 19;

[0035] Support block 171, lifting rod 172, second spring 173, support plate 174, roller 175;

[0036] Clamping rod 181, clamping cylinder 182, clamping block 183, moving rod 184, first spring 185, connecting seat 186, connecting rod 187, adsorption hole 188;

[0037] Blind hole 191 , connecting pipe 192 , pressure regulating pipe 193 , magnetic disk 194 , third spring 195 , connecting ring 196 , and limiting block 197 . DETAILED DESCRIPTION

[0038] like Figure 1-12 As shown, a multi-station piston milling pneumatic tooling in this embodiment includes seven fixing mechanisms 1, which are distributed from left to right. The fixing mechanism 1 includes a base 11 and a vertical plate 12. The vertical plate 12 is fixedly arranged on the top of the base 11. A positioning block 13 is fixedly arranged on the front side of the vertical plate 12. A positioning groove 14 is arranged 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 is arranged vertically. The top of the workpiece 2 A groove 3 is provided, and a positioning pin 15 is pierced on the vertical plate 12. The positioning pin 15 is parallel to the front-rear direction, and the positioning pin 15 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 a positioning cylinder 16. The cylinder body of the positioning cylinder 16 is fixedly provided on the vertical plate 12. A supporting assembly 17 and a clamping assembly 18 are provided on the vertical plate 12. The supporting assembly 17 is used to apply an upward thrust to the workpiece 2, and the clamping assembly 18 is used to clamp the workpiece 2.

[0039] The clamping assembly 18 includes a clamping rod 181 and a clamping cylinder 182. The clamping rod 181 is vertically arranged on the front side of the positioning block 13. The cylinder body of the clamping cylinder 182 is fixedly arranged 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 arranged in the concave. The rear side of the clamping block 183 is an arc surface, and the arc surface matches the workpiece 2. A moving rod 184 is fixedly arranged on the rear side of the clamping block 183. The moving rod 184 is parallel to the front and rear directions. The moving rod 184 passes through the clamping rod 181. The moving rod 184 is sleeved with a A spring 185, wherein the first spring 185 is located at the front side 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, and 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 at the rear side of the clamping block 183, and a pressure regulating assembly 19 is provided on the clamping block 183. The pressure regulating assembly 19 controls the air pressure in the adsorption hole 188 by moving the positioning pin 15;

[0040] The support assembly 17 is located below the positioning block 13, and 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 end 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 shape of the support block 171 is a truncated cone, and the small diameter end of the support block 171 is arranged upward, and the roller 175 is fixedly arranged on the clamping rod 181;

[0041] The pressure regulating assembly 19 includes a blind hole 191, which is arranged at the top of the clamping block 183, a connecting pipe 192 is inserted into the blind hole 191, the top of the connecting pipe 192 is sealed, the connecting pipe 192 is located at the front side of the positioning pin 15, a pressure regulating pipe 193 is arranged at the front side of the connecting pipe 192, the inner cavity of the pressure regulating pipe 193, the inner cavity of the connecting pipe 192, the inner cavity of the blind hole 191 and the inner cavity of the adsorption hole 188 form a pressure regulating airway, a magnetic disk 194 is arranged in the connecting pipe 192, the magnetic disk 194 is slidably and sealedly connected to the pressure regulating pipe 193, and the magnetic disk 194 is connected to the inner wall of the pressure regulating pipe 193 through a third spring 195;

[0042] A connecting ring 196 is fixedly disposed in the voltage regulating tube 193, and the connecting ring 196 is located at the rear side of the magnetic disk 194. The third spring 195 is located between the connecting ring 196 and the magnetic disk 194, and the two ends of the third spring 195 are respectively connected to the connecting ring 196 and the magnetic disk 194;

[0043] The front end of the voltage regulating tube 193 is fixedly arranged at a limit block 197, and the function of the limit block 197 is to prevent the magnetic disk 194 from moving out of the voltage regulating tube 193;

[0044] The positioning pin 15 is made of iron;

[0045] Working principle:

[0046] Before loading, the clamping rod 181 is driven by the clamping cylinder 182 to move the bottom end of the clamping rod 181 backwards, and because the clamping rod 181 is hinged to the clamping seat through the connecting rod 187, the top end of the clamping rod 181 rotates forwards to open the clamping rod 181. During the rotation of the clamping rod 181, the roller 175 is driven to rotate synchronously to separate the roller 175 from the support block 171. At this time, a gap is set between the side of the clamping block 183 close to the moving rod 184 and the clamping rod 181.

[0047] When loading, the workpiece 2 is manually placed vertically in the positioning groove 14 and abutted 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, so that the second spring 173 is deformed. After the workpiece 2 is released, the lifting rod 172 drives the support block 171 to move upward through the elastic action of the second spring 173, that is, the support block 171 generates an upward thrust on the workpiece 2, so that the bottom of the groove 3 abuts against the positioning pin 15, so that the workpiece 2 is positioned in the up and down directions.

[0048] Subsequently, the bottom end of the clamping rod 181 is driven forward by the clamping cylinder 182, that is, the top end of the clamping rod 181 moves backward, and during the backward movement of the top end of the clamping rod 181, the clamping block 183 is preferentially abutted against the workpiece 2. As the clamping rod 181 continues to rotate, the gap between the side of the clamping block 183 close to the moving rod 184 and the clamping rod 181 is reduced, that is, the moving rod 184 and the clamping rod 181 move relative to each other, and the first spring 185 is deformed. Through the elastic action of the first spring 185, the moving rod 184 drives the clamping The tightening block 183 applies a backward thrust to the workpiece 2. As the clamping rod 181 continues to rotate again, the roller 175 abuts against the outer peripheral wall of the support block 171, and the roller 175 pushes the support block 171 to move downward, so that the support block 171 is separated from the workpiece 2, that is, the support block 171 stops applying an upward thrust to the workpiece 2, so as to avoid the workpiece 2 being biased upward when the positioning pin 15 is separated from the workpiece 2. When the support block 171 is separated from the workpiece 2, the clamping force generated by the clamping block 183 on the workpiece 2 is used to clamp the workpiece 2, that is, the workpiece 2 remains stationary.

[0049] When the clamping rod 181 rotates, the side of the clamping block 183 close to the moving rod 184 abuts against the clamping rod 181, and the clamping rod 181 stops rotating. According to calculation, at this time, the workpiece 2 blocks the adsorption hole 188, that is, during the rotation of the clamping rod 181, the following actions are performed in sequence:

[0050] A gap is reduced between the side of the clamping block 183 close to the moving rod 184 and the clamping rod 181, the roller 175 pushes the support block 171 to separate from the workpiece 2, the side of the clamping block 183 close to the moving rod 184 abuts against the clamping rod 181 and makes the workpiece 2 block the adsorption hole 188;

[0051] In addition, when the top end of the clamping rod 181 rotates backward, 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 in the voltage regulating tube 193 toward the connecting tube 192, and the third spring 195 is deformed.

[0052] Next, the positioning pin 15 is driven to move by the positioning cylinder 16, so that the positioning pin 15 moves out of the groove 3, leaving the position where the workpiece 2 needs 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 smaller than the elastic force of the third spring 195 at this time, that is, the magnetic disk 194 is moved away from the connecting pipe 192 by the third spring 195, that is, the air pressure in the adsorption hole 188 is reduced, so that the adsorption hole 188 adsorbs the workpiece 2, thereby improving the fixing stability of the workpiece 2;

[0053] Afterwards, the workpiece 2 is milled;

[0054] After the milling process 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, and 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 block 183 and the clamping block 183 is reset. The adsorption effect of the adsorption hole 188 on the workpiece 2 causes the clamping block 183 to drive the workpiece 2 to move out of the groove 3 of the positioning block 13, and the workpiece 2 is manually removed from the clamping block 183. The air pressure in the adsorption hole 188 is restored to atmospheric pressure, and the magnetic disk 194 moves in the pressure regulating tube 193, and the relative position between the magnetic disk 194 and the connecting tube 192 is reset.

[0055] To sum up, in the process of fixing the workpiece 2, an upward thrust is generated on the workpiece 2 through the support block 171, so that the inner wall of the groove 3 on the workpiece 2 abuts against the positioning pin 15, thereby realizing the vertical positioning of the workpiece 2, and the workpiece 2 is clamped by the positioning block 13 and the clamping block 183 to realize horizontal positioning and fixation, thereby improving the processing accuracy of the workpiece 2. In addition, when the workpiece 2 is processed, the workpiece 2 is adsorbed through the adsorption hole 188 to avoid the workpiece 2 from being offset during processing, thereby further improving the processing accuracy of the workpiece 2. Secondly, after the workpiece 2 is processed, the workpiece 2 is adsorbed through the adsorption hole 188 on the clamping block 183, so that the workpiece 2 moves out of the positioning groove 14 along with the clamping block 183, thereby facilitating the unloading of the workpiece 2.

[0056] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A multi-station piston milling pneumatic tooling, characterized by: The fixing mechanism (1) comprises at least one fixing mechanism (1), wherein the fixing mechanism (1) comprises a base (11) and a vertical plate (12), wherein the vertical plate (12) is fixedly arranged on the base (11), a positioning block (13) is fixedly arranged on the vertical plate (12), a positioning groove (14) is arranged on the front side of the positioning block (13), a positioning pin (15) is passed through the vertical plate (12), and the positioning pin (15) is driven to move by a positioning cylinder (16), and a supporting assembly (17) and a clamping assembly (18) are arranged on the vertical plate (12); The clamping assembly (18) comprises a clamping rod (181), wherein the clamping rod (181) is arranged on the front side of the positioning block (13), one end of the clamping rod (181) is driven to move forward and backward by a clamping cylinder (182), the rear side of the other end of the clamping rod (181) is provided with a recess, a clamping block (183) is arranged in the recess, a moving rod (184) is fixedly arranged on the rear side of the clamping block (183), the moving rod (184) is connected to the clamping rod (181) in a forward and backward sliding manner, the moving rod (184) is parallel to the forward and backward direction, and the moving rod (184) passes through the clamping rod (181) ), the moving rod (184) is elastically connected to the clamping rod (181), 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), a suction hole (188) is provided on the rear side of the clamping block (183), a pressure regulating assembly (19) is provided on the clamping block (183), and the pressure regulating assembly (19) controls the air pressure in the suction hole (188) by moving the positioning pin (15); The support assembly (17) is located below the positioning block (13). The support assembly (17) comprises 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 arranged vertically. The support block (171) is fixedly arranged at the top end 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). The other end of the second spring (173) is connected to the support plate (174). The roller (175) is fixedly arranged on the clamping rod (181).

2. The multi-station piston milling pneumatic tooling according to claim 1, characterized in that: The rear side of the clamping block (183) is a curved surface.

3. The multi-station piston milling pneumatic tooling according to claim 1, characterized in that: The pressure regulating assembly (19) comprises a blind hole (191), wherein the blind hole (191) is arranged at the top of the clamping block (183), a connecting tube (192) is inserted into the blind hole (191), 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 arranged in front of the connecting tube (192), the inner cavity of the pressure regulating tube (193), the inner cavity of the connecting tube (192), the inner cavity of the blind hole (191) and the inner cavity of the adsorption hole (188) form a pressure regulating airway, a magnetic disk (194) is arranged in the connecting tube (192), the magnetic disk (194) is slidably and sealingly connected to the pressure regulating tube (193), and the magnetic disk (194) is connected to the inner wall of the pressure regulating tube (193) via a third spring (195).

4. The multi-station piston milling pneumatic tooling according to claim 3 is characterized by: A connecting ring (196) is fixedly arranged inside the voltage regulating tube (193); the connecting ring (196) is located at the rear side of the magnetic disk (194); the third spring (195) is located between the connecting ring (196) and the magnetic disk (194); and two ends of the third spring (195) are respectively connected to the connecting ring (196) and the magnetic disk (194).

5. The multi-station piston milling pneumatic tooling according to claim 3 is characterized by: The front end of the pressure regulating tube (193) is fixedly arranged on a limiting block (197).

6. The multi-station piston milling pneumatic tooling according to claim 3, characterized in that: The positioning pin (15) is made of iron.

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

8. The multi-station piston milling pneumatic tooling according to claim 1, characterized in that: Seven fixing mechanisms (1) are provided, and the seven fixing mechanisms (1) are distributed from left to right.

9. The multi-station piston milling pneumatic tooling according to claim 1, characterized in that: The support block (171) is in the shape of a truncated cone, and the small diameter end of the support block (171) is arranged to rise.

10. The multi-station piston milling pneumatic tooling according to claim 1, characterized in that: A first spring (185) is sleeved on the moving rod (184). The first spring (185) is located at the front side 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).

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