A press machine

Abstract

The application relates to the technical field of industrial robots, and particularly discloses a press-fitting machine which comprises a mechanical arm body and a seat ring cooling assembly, a press-fitting assembly is fixedly installed on the wrist part of the mechanical arm body, the press-fitting assembly comprises a first reciprocating thrust output piece with a fixed end and a moving end, the fixed end of the first reciprocating thrust output piece is detachably connected with the wrist part of the mechanical arm body, a first press head is installed on the moving end of the first reciprocating thrust output piece, a clamp is installed on the first reciprocating thrust output piece or the wrist part of the mechanical arm body, the seat ring cooling assembly comprises a heat preservation container provided with an opening and a base, one end of a supporting rod is rotationally connected with the base, a limiting frame parallel to the supporting rod is fixedly arranged on the base, a first spiral blade and a second spiral blade are fixedly arranged on the supporting rod and connected together at the end parts, and the second spiral blade is located between the first spiral blade and the base. The press-fitting machine guarantees the working efficiency of the press-fitting machine and improves the quality of seat ring press-fitting.

Description

Technical Field

[0001] This invention relates to the field of industrial robot technology, specifically a press-fitting machine. Background Technology

[0002] The cylinder head is an important component of the engine, and the press-fitting of the cylinder head seat ring is a key process in cylinder head machining, which directly affects engine performance. In the current technology, vertical press-fitting machines driven by servo electric cylinders are mostly used to press-fit the cylinder head seat ring. They have advantages such as low cost, compact structure, high repeatability and positioning accuracy, and real-time pressure data acquisition. However, when the interference fit of the cylinder head seat ring approaches the upper limit of the tolerance, press-fitting force overload is prone to occur, which can lead to cracks, chipping, scratches on the mating surfaces, and plastic deformation of the cylinder head seat ring. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a press-fitting machine that ensures the working efficiency of the press-fitting machine and improves the quality of seat ring press-fitting.

[0004] The technical solution adopted by this invention to solve its technical problem includes: On one hand, a press fitting machine is provided, including a robotic arm body and a seat ring cooling assembly. The wrist of the robotic arm body is fixedly mounted with a press fitting assembly. The press fitting assembly includes a first reciprocating thrust output member having a fixed end and a movable end. The fixed end of the first reciprocating thrust output member is detachably connected to the wrist of the robotic arm body. A first pressure head is mounted on the movable end of the first reciprocating thrust output member. A clamp is mounted on the first reciprocating thrust output member or on the wrist of the robotic arm body.

[0005] The seat ring cooling assembly includes an insulated container with an opening and a base. The base and one end of a support rod are rotatably connected. A limiting frame parallel to the support rod is fixed on the base. A first spiral blade and a second spiral blade connected at their ends are fixed on the support rod. The second spiral blade is located between the first spiral blade and the base.

[0006] The ratio of the pitch of the second helical blade to the pitch of the first helical blade is 1:5-100.

[0007] The base is placed on the bottom side of the inner cavity of the insulated container, which contains dry ice or liquid nitrogen.

[0008] As a preferred embodiment of the present invention, the clamp includes a support frame, a ring frame, and a mounting seat installed on the first reciprocating thrust output component or on the wrist of the robotic arm body. The ring frame is fixed to the mounting seat by the support frame, and at least two sets of clamping components are installed on the ring frame.

[0009] A guide seat is installed between the first pressure head and the moving end of the first reciprocating thrust output component, and a moving component that can slide along the moving direction of the moving end of the first reciprocating thrust output component is installed on the guide seat.

[0010] The clamping member includes a gripper with one end rotatably connected to the ring frame, and the middle part of the gripper and the moving part are rotatably connected to the connecting member respectively.

[0011] The first pressure head moves through the space between the three sets of clamping members.

[0012] As a preferred embodiment of the present invention, the ring frame has three clamping components, and a triangular prism is fixed on the support rod away from the base.

[0013] As a preferred embodiment of the present invention, the limiting frame is an arc-shaped plate arranged parallel to the support rod or two guide rods arranged parallel to the support rod.

[0014] As a preferred embodiment of the present invention, the first pressure head includes a pressure block, a fixing block and a ball, the ball is connected to one end of the connector, the fixing block is provided with a through hole and the pressure block is provided with an arc groove.

[0015] The fixing block is installed on the pressure block, and the perforation and arc groove form a sphere receiving groove, and the outer side of the sphere and the inner wall of the sphere receiving groove slide against each other.

[0016] As a preferred embodiment of the present invention, it further includes a pressure plate with a central opening, the connector passing through the opening of the pressure plate, and an elastic element provided between the pressure plate and the fixing block.

[0017] As a preferred embodiment of the present invention, a pressure sensor is installed between the moving end of the first reciprocating thrust output component and the first pressure head.

[0018] On the other hand, a press fitting machine is also provided, including a seat ring cooling assembly, a support platform and a bottom seat. A second reciprocating thrust output component is mounted on the bottom seat via the support platform. A second pressure head is mounted on the moving end of the second reciprocating thrust output component. A seat ring displacement platform is also mounted on the bottom seat.

[0019] The seat ring cooling assembly includes an insulated container with an opening and a base. The base and one end of a support rod are rotatably connected. A limiting frame parallel to the support rod is fixed on the base. A first spiral blade and a second spiral blade connected at their ends are fixed on the support rod. The second spiral blade is located between the first spiral blade and the base.

[0020] The ratio of the pitch of the second helical blade to the pitch of the first helical blade is 1:5-100.

[0021] The base is placed on the bottom side of the inner cavity of the insulated container, which contains dry ice or liquid nitrogen.

[0022] As a preferred embodiment of the present invention, it further includes a robotic arm body, wherein a pressing assembly is fixedly installed on the wrist of the robotic arm body, the pressing assembly includes a first reciprocating thrust output component having a fixed end and a movable end, the fixed end of the first reciprocating thrust output component is detachably connected to the wrist of the robotic arm body, a movable component is fixedly installed on the movable end of the first reciprocating thrust output component, and a clamp is installed on the first reciprocating thrust output component or on the wrist of the robotic arm body.

[0023] The clamp includes a support frame, a ring frame, and a mounting base installed on the first reciprocating thrust output component or on the wrist of the robotic arm body. The ring frame is fixed to the mounting base by the support frame, and at least two sets of clamping components are installed on the ring frame.

[0024] The clamping member includes a gripper with one end rotatably connected to the ring frame, and the middle part of the gripper and the moving part are rotatably connected to the connecting member respectively.

[0025] As a preferred embodiment of the present invention, the number of clamping components on the ring frame is three sets, a triangular prism is fixed on the support rod away from the base, and the limiting frame is an arc-shaped plate arranged parallel to the support rod or two guide rods arranged parallel to the support rod.

[0026] Compared with the prior art, the beneficial effects of the present invention are: 1. The press-fitting machine of the present invention utilizes the different pitches of the first and second helical blades to sequentially remove the seat rings from the cold source. The seat rings are placed on the seat ring holes of the cylinder head, and the first pressure head on the first reciprocating thrust output component presses the seat rings into the seat ring holes of the cylinder head, thus ensuring the working efficiency of the press-fitting machine and improving the quality of seat ring pressing.

[0027] 2. In the press-fitting machine of the present invention, the first reciprocating thrust output component serves as both the power source for press-fitting the seat ring and the power source for picking up and placing the seat ring, thereby reducing the weight of the end of the robotic arm body, improving the positioning accuracy, enhancing the working performance of the robotic arm body, and reducing the dwell time of the seat ring on the cylinder head seat ring hole before press-fitting, thus reducing the resistance of pressing the seat ring into the cylinder head seat ring hole and ensuring the press-fitting effect of the seat ring.

[0028] 3. In the press fitting machine of the present invention, when there is a positional misalignment between the press block and the seat ring, the press block contacts the seat ring first, and the press block rotates against the ball to make the end face of the press block and the end face of the seat ring fit together, so that the seat ring is subjected to uniform force and avoids deformation of the seat ring or scratches on the outer side of the seat ring. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an embodiment of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A; Figure 3 for Figure 1 A schematic diagram of the press-fit assembly structure; Figure 4 for Figure 1 A partial cross-sectional view of the first pressure head; Figure 5 This is a partial cross-sectional view of the seat ring cooling assembly of the present invention; Figure 6 This is a schematic diagram of another embodiment of the present invention; Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0030] In the diagram: 1. Robotic arm body; 2. Seat ring cooling assembly; 201. Triangular prism; 202. Support rod; 203. First helical blade; 204. Second helical blade; 205. Limiting frame; 211. Insulated container; 221. Base; 3. Press assembly; 301. First reciprocating thrust output component; 302. First pressure head; 3021. Connector; 3022. Pressure plate; 3023. Elastic component; 3024. Fixing block; 3025. Ball; 3026. Pressure block; 303. Mounting seat; 304. Pressure sensor; 305. Guide seat; 311. Support frame; 312. Moving component; 313. Ring frame; 314. Connector; 315. Gripper; 4. Support platform; 5. Second reciprocating thrust output component; 6. Second pressure head; 7. Seat ring displacement platform; 8. Bottom seat. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1: Please see Figures 1-5This embodiment discloses a press fitting machine, including a robotic arm body 1 and a seat ring cooling assembly 2. The robotic arm body 1 includes a wrist and a base. The base of the robotic arm body 1 is mounted on an external support surface. A press fitting assembly 3 is fixedly installed on the wrist of the robotic arm body 1. The press fitting assembly 3 includes a first reciprocating thrust output component 301 with a fixed end and a movable end. The fixed end of the first reciprocating thrust output component 301 is connected to the wrist of the robotic arm body 1 by a flange or a buckle. A first pressure head 302 is installed on the movable end of the first reciprocating thrust output component 301. A clamp is installed on the first reciprocating thrust output component 301 or on the wrist of the robotic arm body 1.

[0033] The seat ring cooling assembly 2 includes an insulated container 211 with an opening and a base 221. The base 221 and one end of the support rod 202 are connected by a bearing or a rotating pin sleeve. A limiting frame 205 parallel to the support rod 202 is fixed on the base 221. A first helical blade 203 and a second helical blade 204 are fixed on the support rod 202. The second helical blade 204 is located between the first helical blade 203 and the base 221. The bottom end of the first helical blade 203 and the top end of the second helical blade 204 are connected.

[0034] The ratio of the pitch of the second helical blade 204 to the pitch of the first helical blade 203 is 1:5-100.

[0035] The base 221 is placed on the bottom side of the inner cavity of the insulated container 211, and a cold source is placed inside the insulated container 211, which is either crushed dry ice or liquid nitrogen.

[0036] Preferably, the robotic arm body 1 is a programmable robotic arm body with at least three motion axes, which is common in the prior art. The controller inside the robotic arm body 1 enables the wrist and gripper of the robotic arm body 1 to perform material picking and unloading actions at accurate positions according to a preset trajectory. The sensing module and controller inside the robotic arm body 1 realize the automation of the entire operation process through signal interaction. Its working method and circuit structure are well known technologies and will not be described in detail here.

[0037] The working process and principle of this embodiment are as follows: The operator adds a cold source into the insulated container 211. The second spiral blade 204 is located in the cold source. The external feeding device places the seat ring between the support rod 202 and the limiting frame 205 in sequence. The support rod 202 and the limiting frame 205 both abut against the outer circumference of the seat ring, so that the seat ring can only move along the length of the support rod 202. Rotating the support rod 202, the first spiral blade 203 and the second spiral blade 204 on the support rod 202 cause the seat ring to enter the cold source. The distance between two adjacent seat rings in the cold source is an integer multiple of the pitch of the second spiral blade 204. The cold source lowers the temperature of the seat ring, and the outer diameter of the seat ring becomes smaller.

[0038] Rotating the support rod 202 causes the first helical blade 203 and the second helical blade 204 on the support rod 202 to move one of the seat rings in the cold source away from the cold source and to the opening of the insulation container 211. The clamp on the robotic arm body 1 moves the seat ring at the opening of the insulation container 211 to the cylinder head seat ring hole. Then, the first pressure head 302 on the first reciprocating thrust output component 301 presses the seat ring into the cylinder head seat ring hole. The seat ring temperature rises, causing the outer diameter of the seat ring to recover. The seat ring and the cylinder head seat ring hole form a firm and high-precision interference fit.

[0039] In this embodiment, the seat ring is pre-placed in a cold source, and the seat ring in the cold source is taken out sequentially by utilizing the different pitches of the first spiral blade 203 and the second spiral blade 204, which ensures the working efficiency of this press-fitting machine and improves the quality of seat ring pressing.

[0040] In this embodiment, the clamp holds the support rod 202, and the robotic arm body 1 drives the support rod 202 to rotate forward or backward through the clamp, so that the seat ring between the support rod 202 and the limiting frame 205 moves upward or downward.

[0041] Furthermore, the external feeding equipment is a vibrating feeding plate or a feeding robot. After the seat ring is removed from the cold source, dry compressed air is used to blow away the frost layer on the surface of the seat ring to avoid residual moisture between the seat ring and the cylinder head seat ring hole.

[0042] Furthermore, a support rod circumferential annular plate extends from the top of the first helical blade 203, which ensures that the seat ring is accurately positioned in the ready-to-be-removed state.

[0043] Example 2: like Figures 1-3 As shown, this embodiment discloses a press fitting machine, whose structure is roughly the same as that of Embodiment 1. The difference is that the clamp in this embodiment includes a support frame 311, a ring frame 313, and a mounting seat 303 installed on the first reciprocating thrust output component 301 or on the wrist of the robotic arm body 1. The ring frame 313 is fixed to the mounting seat 303 by the support frame 311, and not less than two sets of clamping components are installed on the ring frame 313.

[0044] A pressure sensor 304 and a guide seat 305 are installed between the moving end of the first reciprocating thrust output component 301 and the first pressure head 302. A moving component 312 that can slide along the moving direction of the moving end of the first reciprocating thrust output component 301 is installed on the guide seat 305.

[0045] The clamping member 315 has one end connected to the ring frame 313 via a hinge, pin, or hinge seat, and the middle part of the clamping member 315 and the moving member 312 are respectively connected to the connecting member 314 via a hinge, pin, or hinge seat.

[0046] The first pressure head 302 moves through the space between the three sets of clamping components.

[0047] Furthermore, the first reciprocating thrust output component 301 is a servo electric cylinder or a hydraulic cylinder, and the first reciprocating thrust output component 301 is electrically connected to an external programmable controller.

[0048] Furthermore, the pressure sensor 304 is a commonly used electronic component in the prior art, and its working method and circuit structure are well-known technologies, so they will not be described in detail here.

[0049] The working process and principle of this embodiment are as follows: Seat ring picking: The wrist of the robotic arm body 1 moves to the preset picking position, the moving end of the first reciprocating thrust output component 301 moves downward, the first reciprocating thrust output component 301 retracts, the first pressure head 302 moves towards the fixed end of the first reciprocating thrust output component 301, the first pressure head 302 drives the gripper 315 to rotate inward through the moving component 312 and the connecting component 314, and no less than two grippers 315 clamp the seat ring.

[0050] Material release from the cylinder head seat: The wrist of the robotic arm body 1 moves to the preset material release position, the seat is located above the cylinder head seat hole, the first reciprocating thrust output component 301 extends, the first pressure head 302 moves away from the fixed end of the first reciprocating thrust output component 301, the squeezing force of the first pressure head 302 on the moving component 312 disappears, the moving component 312 moves downward under the action of gravity, the moving component 312 drives the gripper 315 to rotate outward through the connecting component 314, and the seat is placed on the cylinder head seat hole.

[0051] Seat ring pressing: After the seat ring is placed on the cylinder head seat ring hole, the first reciprocating thrust output component 301 continues to extend, and the first press head 302 presses down on the seat ring so that the seat ring is pressed into the cylinder head seat ring hole.

[0052] The first reciprocating thrust output component 301 of this press-fitting machine serves as both the power source for press-fitting the seat ring and the power source for picking up and placing the seat ring. This reduces the weight at the end of the robotic arm body 1, improves positioning accuracy, enhances the working performance of the robotic arm body 1, and reduces the dwell time of the seat ring on the cylinder head seat ring hole before press-fitting, thereby reducing the resistance of pressing the seat ring into the cylinder head seat ring hole and ensuring the press-fitting effect of the seat ring.

[0053] Furthermore, the guide seat 305 is a sliding guide rod, and the moving part 312 is a slider that can slide on the sliding guide rod.

[0054] Furthermore, the robotic arm body 1 is equipped with an image recognition module commonly used in the prior art, which enables auxiliary positioning of the seat ring, auxiliary positioning of the cylinder head seat ring hole, detection of pressing quality, and determination of the presence or absence of the seat ring.

[0055] Example 3: like Figure 2 and Figure 3 As shown, this embodiment discloses a press fitting machine, whose structure is roughly the same as that of Embodiment 2. The difference is that the number of clamping parts on the ring frame 313 in this embodiment is three, and a triangular prism 201 is fixed on the support rod 202 away from the base 221.

[0056] The working process and principle of this embodiment are as follows: Seat ring unloading: The moving end of the first reciprocating thrust output component 301 moves downward, the first reciprocating thrust output component 301 retracts, the first pressure head 302 moves towards the fixed end of the first reciprocating thrust output component 301, the first pressure head 302 drives the gripper 315 to rotate inward through the moving component 312 and the connecting component 314, the three grippers 315 clamp the triangular prism 201, and then the wrist of the robotic arm body 1 drives the support rod 202 to rotate through the pressing component 3 and the triangular prism 201. The support rod 202 rotates, and the first spiral blade 203 and the second spiral blade 204 on the support rod 202 cause one of the seat rings in the cold source to leave the cold source and move to the opening of the heat preservation container 211, realizing the sequential unloading of the seat rings.

[0057] The first reciprocating thrust output component 301 of this press machine serves as both the power source for sequential material discharge from the seat ring and the power source for material pick-up from the seat ring, thereby improving the working performance of the robotic arm body 1.

[0058] Example 4: like Figure 5 As shown, this embodiment discloses a press fitting machine, whose structure is roughly the same as that of Embodiment 1. The difference is that in this embodiment, the limiting frame 205 is an arc-shaped plate arranged parallel to the support rod 202 or two guide rods arranged parallel to the support rod 202.

[0059] The working process and principle of this embodiment are as follows: The limiting bracket 205 and the support rod 202 work together to ensure that the seat ring can only move along the length of the support rod 202, thus preventing the seat ring from falling off between the limiting bracket 205 and the support rod 202.

[0060] Example 5: like Figure 4 As shown, this embodiment discloses a press fitting machine, whose structure is roughly the same as that of Embodiment 1. The difference is that the first press head 302 in this embodiment includes a press block 3026, a fixing block 3024 and a ball 3025. The ball 3025 is connected to one end of the connector 3021. The fixing block 3024 is provided with a through hole. The press block 3026 is provided with an arc groove. The connector 3021 and the moving end of the first reciprocating thrust output component 301 are detachably connected.

[0061] The fixing block 3024 is installed on the pressure block 3026 by bolts or clips. The combination of perforation and arc groove forms a sphere receiving groove. The outer side of the sphere 3025 and the inner wall of the sphere receiving groove slide against each other.

[0062] The working process and principle of this embodiment are as follows: During the press-fitting process of the seat ring, when there is a positional misalignment between the pressure block 3026 and the seat ring, the pressure block 3026 contacts the seat ring first, and the pressure block 3026 rotates against the ball 3025, so that the end face of the pressure block 3026 and the end face of the seat ring are in contact, the seat ring is subjected to uniform force, and the seat ring is prevented from deforming or being scratched on the outside of the seat ring.

[0063] Furthermore, the robotic arm body 1 is equipped with a vision positioning component or servo fine-tuning component commonly used in the prior art to achieve the alignment of the first pressure head 302 and the cylinder head seat hole.

[0064] Example 6: like Figure 4 As shown, this embodiment discloses a press fitting machine, whose structure is roughly the same as that of embodiment five. The difference is that this embodiment also includes a pressure plate 3022 with a central opening, a connector 3021 passing through the opening of the pressure plate 3022, and an elastic element 3023 between the pressure plate 3022 and the fixing block 3024. The elastic element 3023 is a spring or an elastic rubber ring.

[0065] The working process and principle of this embodiment are as follows: During the seat ring pressing process, when there is a positional misalignment between the pressure block 3026 and the seat ring, the pressure block 3026 contacts the seat ring first, and the pressure block 3026 rotates in contact with the ball 3025. The deformation of the elastic element 3023 increases, and the end face of the pressure block 3026 fits with the end face of the seat ring, so that the seat ring is subjected to uniform force and avoids deformation of the seat ring or scratches on the outer side of the seat ring.

[0066] After the end face of the pressure block 3026 disengages from the seat ring, the elastic element 3023 resets the position of the pressure block 3026, improving the reliability of this press-fitting machine.

[0067] Example 7: like Figure 5 , Figure 6 and Figure 7 As shown, this embodiment discloses a press fitting machine. This embodiment includes a seat ring cooling assembly 2, a support platform 4 and a bottom seat 8. A second reciprocating thrust output component 5 is installed on the bottom seat 8 via the support platform 4. A second pressure head 6 is installed on the moving end of the second reciprocating thrust output component 5. A seat ring displacement platform 7 is also installed on the bottom seat 8.

[0068] The seat ring cooling assembly 2 includes an insulated container 211 with an opening and a base 221. The base 221 and one end of the support rod 202 are connected by a bearing or a rotating pin sleeve. A limiting frame 205 parallel to the support rod 202 is fixed on the base 221. A first helical blade 203 and a second helical blade 204 are fixed on the support rod 202. The second helical blade 204 is located between the first helical blade 203 and the base 221. The bottom end of the first helical blade 203 and the top end of the second helical blade 204 are connected.

[0069] The ratio of the pitch of the second helical blade 204 to the pitch of the first helical blade 203 is 1:5-100.

[0070] The base 221 is placed on the bottom side of the inner cavity of the insulated container 211, and a cold source is placed inside the insulated container 211, which is either crushed dry ice or liquid nitrogen.

[0071] The working process and principle of this embodiment are as follows: The operator adds a cold source into the insulated container 211. The second spiral blade 204 is located in the cold source. The external feeding device places the seat ring between the support rod 202 and the limiting frame 205 in sequence. The support rod 202 and the limiting frame 205 cooperate to restrict the seat ring to move only along the length of the support rod 202. When the support rod 202 is rotated, the first spiral blade 203 and the second spiral blade 204 on the support rod 202 cause the seat ring to enter the cold source. The distance between two adjacent seat rings in the cold source is an integer multiple of the pitch of the second spiral blade 204. The cold source lowers the temperature of the seat ring and reduces the outer diameter of the seat ring.

[0072] Rotating the support rod 202 causes the first helical blade 203 and the second helical blade 204 on the support rod 202 to move one of the seat rings in the cold source away from the cold source and to the opening of the insulation container 211. The external material transfer device moves the seat ring at the opening of the insulation container 211 to the cylinder head seat ring hole. Then, the second reciprocating thrust output component 5 causes the second pressure head 6 to press the seat ring into the cylinder head seat ring hole. After the seat ring is reinstalled, the temperature rises and the outer diameter of the seat ring is restored. The seat ring and the cylinder head seat ring hole form a firm and high-precision interference fit.

[0073] In this embodiment, the seat ring is pre-placed in a cold source, and the seat ring in the cold source is taken out sequentially by utilizing the different pitches of the first spiral blade 203 and the second spiral blade 204, which ensures the working efficiency of this press-fitting machine and improves the quality of seat ring pressing.

[0074] Furthermore, a support rod circumferential annular plate extends from the top of the first helical blade 203, which ensures the seat ring is accurately positioned when it is ready to be removed.

[0075] Furthermore, the seat ring displacement platform 7 includes a support platform, a lateral displacement cylinder, and a rotation drive motor. The seat ring displacement platform 7 adjusts and positions the cylinder head.

[0076] Example 8: like Figure 6 As shown, this embodiment discloses a press fitting machine, whose structure is roughly the same as that of Embodiment 7. The difference is that this embodiment also includes a robotic arm body 1. The robotic arm body 1 includes a wrist and a base. The base of the robotic arm body 1 is mounted on an external support surface. A press fitting assembly 3 is fixedly installed on the wrist of the robotic arm body 1. The press fitting assembly 3 includes a first reciprocating thrust output component 301 with a fixed end and a moving end. The fixed end of the first reciprocating thrust output component 301 is detachably connected to the wrist of the robotic arm body 1. A moving component 312 is fixedly installed on the moving end of the first reciprocating thrust output component 301. A clamp is installed on the first reciprocating thrust output component 301 or on the wrist of the robotic arm body 1.

[0077] The fixture includes a support frame 311, a ring frame 313, and a mounting base 303 mounted on the first reciprocating thrust output component 301 or on the wrist of the robotic arm body 1. The ring frame 313 is fixed to the mounting base 303 by the support frame 311, and at least two sets of clamping components are mounted on the ring frame 313.

[0078] The clamping component includes a jaw 315, one end of which is rotatably connected to the ring frame 313. The middle part of the jaw 315 and the moving part 312 are rotatably connected to the connecting part 314 respectively. The jaw 315 is distributed at equal angles around the axis of the ring frame 313.

[0079] The working process and principle of this embodiment are as follows: During the process of the second reciprocating thrust output component 5 pressing the seat ring into the cylinder head seat ring hole through the second pressure head 6, the clamp on the robotic arm body 1 holds the support rod 202 and then rotates the support rod 202. The first helical blade 203 and the second helical blade 204 on the support rod 202 cause one of the seat rings in the cold source to leave the cold source and move to the opening of the insulation container 211. The clamp on the robotic arm body 1 releases the support rod 202 and leaves the support rod 202. After the second pressure head 6 finishes pressing the seat ring, the clamp on the robotic arm body 1 moves the seat ring at the opening of the insulation container 211 to the cylinder head seat ring hole. The robotic arm body 1 drives the clamp to leave the movement range of the second pressure head 6. The second reciprocating thrust output component 5 causes the second pressure head 6 to press the seat ring into the cylinder head seat ring hole. After the seat ring is reinstalled, the temperature rises and the outer diameter of the seat ring is restored. The seat ring and the cylinder head seat ring hole form a firm and high-precision interference fit, improving the pressing efficiency of the seat ring.

[0080] Example 9: like Figures 5-7As shown, this embodiment discloses a press fitting machine, whose structure is roughly the same as that of embodiment eight. The difference is that the number of clamping parts on the ring frame 313 in this embodiment is three sets, a triangular prism 201 is fixed on the support rod 202 away from the base 221, and the limiting frame 205 is an arc-shaped plate arranged parallel to the support rod 202 or two guide rods arranged parallel to the support rod 202.

[0081] The working process and principle of this embodiment are as follows: Seat ring unloading: The moving end of the first reciprocating thrust output component 301 moves downward, the first reciprocating thrust output component 301 retracts, the moving component 312 moves towards the fixed end of the first reciprocating thrust output component 301, the moving component 312 drives the gripper 315 to rotate inward through the connecting component 314, the three grippers 315 clamp the triangular prism 201, and then the wrist of the robotic arm body 1 drives the support rod 202 to rotate through the pressing component 3 and the triangular prism 201. The support rod 202 rotates, and the first spiral blade 203 and the second spiral blade 204 on the support rod 202 cause one of the seat rings in the cold source to leave the cold source and move to the opening of the heat preservation container 211, realizing the sequential unloading of the seat rings.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A press-fitting machine, characterized in that: The system includes a robotic arm body (1) and a seat ring cooling assembly (2). A pressing assembly (3) is fixedly installed on the wrist of the robotic arm body (1). The pressing assembly (3) includes a first reciprocating thrust output component (301) having a fixed end and a moving end. The fixed end of the first reciprocating thrust output component (301) is detachably connected to the wrist of the robotic arm body (1). A first pressure head (302) is installed on the moving end of the first reciprocating thrust output component (301). A clamp is installed on the first reciprocating thrust output component (301) or on the wrist of the robotic arm body (1). The seat ring cooling assembly (2) includes an insulated container (211) with an opening and a base (221). The base (221) is rotatably connected to one end of a support rod (202). A limiting frame (205) parallel to the support rod (202) is fixed on the base (221). A first spiral blade (203) and a second spiral blade (204) with their ends connected together are fixed on the support rod (202). The second spiral blade (204) is located between the first spiral blade (203) and the base (221). The pitch ratio of the second helical blade (204) to the pitch of the first helical blade (203) is 1:5-100. The base (221) is placed on the bottom side of the inner cavity of the heat-insulating container (211), which contains dry ice or liquid nitrogen.

2. The press-fitting machine according to claim 1, characterized in that: The clamp includes a support frame (311), a ring frame (313), and a mounting seat (303) mounted on the first reciprocating thrust output component (301) or on the wrist of the robotic arm body (1). The ring frame (313) is fixed to the mounting seat (303) by the support frame (311), and at least two sets of clamping components are mounted on the ring frame (313). A guide seat (305) is installed between the first pressure head (302) and the moving end of the first reciprocating thrust output component (301), and a moving component (312) that can slide along the moving direction of the moving end of the first reciprocating thrust output component (301) is installed on the guide seat (305). The clamping member includes a jaw (315) that is rotatably connected to a ring frame (313) at one end, and the middle part of the jaw (315) and the moving part (312) are rotatably connected to the connecting part (314). The first pressure head (302) moves through the space between the three sets of clamping members.

3. The press-fitting machine according to claim 2, characterized in that: The ring frame (313) has three clamping parts, and a triangular prism (201) is fixed on the support rod (202) away from the base (221).

4. The press-fitting machine according to claim 1, characterized in that: The limiting frame (205) is an arc-shaped plate arranged parallel to the support rod (202) or two guide rods arranged parallel to the support rod (202).

5. The press-fitting machine according to claim 1, characterized in that: The first pressure head (302) includes a pressure block (3026), a fixing block (3024) and a ball (3025). The ball (3025) is connected to one end of the connector (3021). The fixing block (3024) is provided with a through hole, and the pressure block (3026) is provided with an arc-shaped groove. The fixing block (3024) is installed on the pressure block (3026), and the perforation and arc groove form a sphere receiving groove. The outer side of the sphere (3025) and the inner wall of the sphere receiving groove slide against each other.

6. The press-fitting machine according to claim 5, characterized in that: It also includes a pressure plate (3022) with a central opening, the connector (3021) passing through the opening of the pressure plate (3022), and an elastic element (3023) between the pressure plate (3022) and the fixing block (3024).

7. The press-fitting machine according to claim 1, characterized in that: A pressure sensor (304) is installed between the moving end of the first reciprocating thrust output component (301) and the first pressure head (302).

8. A press-fitting machine, characterized in that: It includes a seat ring cooling assembly (2), a support platform (4) and a bottom seat (8). A second reciprocating thrust output component (5) is installed on the bottom seat (8) via the support platform (4). A second pressure head (6) is installed on the moving end of the second reciprocating thrust output component (5). A seat ring displacement platform (7) is also installed on the bottom seat (8). The seat ring cooling assembly (2) includes an insulated container (211) with an opening and a base (221). The base (221) is rotatably connected to one end of a support rod (202). A limiting frame (205) parallel to the support rod (202) is fixed on the base (221). A first spiral blade (203) and a second spiral blade (204) with their ends connected together are fixed on the support rod (202). The second spiral blade (204) is located between the first spiral blade (203) and the base (221). The pitch ratio of the second helical blade (204) to the pitch of the first helical blade (203) is 1:5-100. The base (221) is placed on the bottom side of the inner cavity of the heat-insulating container (211), which contains dry ice or liquid nitrogen.

9. The press-fitting machine according to claim 8, characterized in that: It also includes a robotic arm body (1), the wrist of which is fixedly mounted with a pressing assembly (3), the pressing assembly (3) includes a first reciprocating thrust output component (301) having a fixed end and a moving end, the fixed end of the first reciprocating thrust output component (301) and the wrist of the robotic arm body (1) are detachably connected, a moving component (312) is fixedly mounted on the moving end of the first reciprocating thrust output component (301), and a clamp is mounted on the first reciprocating thrust output component (301) or on the wrist of the robotic arm body (1); The clamp includes a support frame (311), a ring frame (313), and a mounting seat (303) mounted on the first reciprocating thrust output component (301) or on the wrist of the robotic arm body (1). The ring frame (313) is fixed to the mounting seat (303) by the support frame (311), and at least two sets of clamping components are mounted on the ring frame (313). The clamping member includes a gripper (315) with one end rotatably connected to the ring frame (313), and the middle part of the gripper (315) and the moving part (312) are rotatably connected to the connecting part (314).

10. The press-fitting machine according to claim 9, characterized in that: The ring frame (313) has three sets of clamping parts. The support rod (202) is fixed with a triangular prism (201) at a position away from the base (221). The limiting frame (205) is an arc-shaped plate arranged parallel to the support rod (202) or two guide rods arranged parallel to the support rod (202).

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