A expansion machine for exhaust pipe orifice

Abstract

The present invention relates to the technical field of pipe expansion processing, and in particular to an expansion machine for an exhaust pipe orifice, comprising a frame, a positioning frame and a positioning seat fixedly connected to the upper end of the frame, a clamping mechanism arranged on the surface of the positioning frame, a first hydraulic cylinder fixedly connected to the front end of the positioning seat, a connecting column fixedly connected to the output end of the first hydraulic cylinder, a expanding mold fixedly connected to the rear end of the connecting column, a main flow channel and a branch flow channel provided in the expanding mold, a groove and an inclined groove provided on the circumferential surface of the expanding mold, a lubricating liquid is transported to the main flow channel by a lubricating mechanism, and then the lubricating liquid enters the branch flow channel and the groove in sequence, as the expanding mold moves backward, the expanded part of the exhaust pipe body is completely contacted with the lubricating liquid, and at the same time, the lubricating liquid continuously enters the inclined groove and fills between the exhaust pipe body and the expansion mold, which has a good lubrication effect on the exhaust pipe body, improves the fluency of the exhaust pipe body expansion processing, and improves the processing quality of the exhaust pipe body expansion.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe expansion processing, and more particularly to an expansion machine for an exhaust pipe orifice. Background Art

[0002] The exhaust pipe is part of the engine's exhaust system, which mainly includes the exhaust manifold, exhaust pipe and muffler. The three-way catalytic converter, which is generally used to control engine pollutant emissions, is also installed in the exhaust system. The exhaust pipe generally includes the front exhaust pipe and the rear exhaust pipe. In the production of pipe fittings such as automobile exhaust pipes, the pipe ends need to be expanded. The pipe fittings are usually hollow thin metal tubes.

[0003] The shortcomings of the existing technology: before expanding the exhaust pipe, it is necessary to manually spray the lubricant on the expansion mold, and then perform the expansion process. Each time the expansion operation is performed, the lubricant must be sprayed on the expansion mold repeatedly, which is labor-intensive and affects the processing efficiency of the exhaust pipe expansion. It is also difficult to evenly apply the lubricant to the expansion mold. When expanding the exhaust pipe, the inner wall of the exhaust pipe body cannot be fully exposed to the lubricant, and the lubrication effect of the exhaust pipe expansion is poor. For this reason, we propose an expansion machine for the exhaust pipe orifice. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an expansion machine for an exhaust pipe orifice to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: an expansion machine for an exhaust pipe orifice, comprising a frame, a positioning frame and a positioning seat fixedly connected to the upper end of the frame, a clamping mechanism provided on the surface of the positioning frame, an exhaust pipe body clamped and fixed in the clamping mechanism, a first hydraulic cylinder fixedly connected to the front end of the positioning seat, a sliding connection between the output end of the first hydraulic cylinder and the positioning seat, a connecting column fixedly connected to the output end of the first hydraulic cylinder, a guide block fixedly connected to the circumferential surface of the connecting column, a plurality of first guide rods fixedly connected between the positioning seat and the positioning frame, a sliding connection between the guide block and the first guide rod The rear end of the connecting column is fixedly connected to an expansion mold, and the expansion mold is slidably connected to the exhaust pipe body. A lubrication mechanism is provided in the expansion mold, and the lubrication mechanism includes a main channel and a branch channel opened in the expansion mold, and the main channel and the branch channel are connected. A groove and an oblique groove are opened on the circumferential surface of the expansion mold, and the branch channel is connected to the groove, and the groove is connected to the oblique groove. The lower end of the frame is fixedly connected to a suspension bracket, and a liquid supply mechanism is provided on the suspension bracket. A support seat is fixedly connected between the frame and the positioning bracket, and a demoulding mechanism is provided on the surface of the support seat;

[0006] Preferably, the clamping mechanism includes a second hydraulic cylinder fixedly connected to the upper end of the positioning frame, the output end of the second hydraulic cylinder is slidably connected to the positioning frame, the output end of the second hydraulic cylinder is fixedly connected to a dynamic clamping block, the upper end of the dynamic clamping block is fixedly connected to a plurality of second guide rods, the second guide rods are slidably connected to the positioning frame, the upper end of the frame is fixedly connected to a fixed clamping block, and the exhaust pipe body is located inside the fixed clamping block and the dynamic clamping block.

[0007] Preferably, a pushing mechanism is provided at the rear end of the fixed clamping block, and the pushing mechanism includes a connecting plate fixedly connected to the rear end of the fixed clamping block, a cylinder is fixedly connected to the rear end of the connecting plate, the cylinder output end is slidingly connected to the connecting plate, a pushing block is fixedly connected to the cylinder output end, and the pushing block is fitted with the rear end of the exhaust pipe body.

[0008] Preferably, the liquid supply mechanism includes a liquid pump and a liquid storage tank fixedly connected to the upper end of the suspension frame, the liquid storage tank is used to store lubricating liquid, the output end of the liquid pump and the liquid storage tank are connected by an input pipe, a connecting flow channel is opened in the connecting column, the connecting flow channel is connected to the main flow channel, a connecting head is fixedly connected in the connecting column, the connecting head is connected to the connecting flow channel, and the output end of the liquid pump and the connecting head are connected by an output pipe.

[0009] Preferably, the demolding mechanism includes a plurality of third guide rods fixedly connected between the support seats, the circumferential surface of the third guide rods is slidably connected to a pair of mutually cooperating supply dies, the surface of the support seat is fixedly connected to a third hydraulic cylinder, the output end of the third hydraulic cylinder is slidably connected to the support seat, the output end of the third hydraulic cylinder is fixedly connected to a connecting seat, the connecting seat and the supply die are fixedly connected, a sealing gasket is fixedly connected to the inner wall of the supply die, the sealing gasket is in contact with the circumferential surface of the exhaust pipe body, a vacuum groove and a pressure supply hole are provided on the surface of the supply die, the pressure supply hole is connected to the vacuum groove, the exhaust pipe body is located in the vacuum groove, and a pressure supply mechanism is provided at the upper end of the suspension bracket.

[0010] Preferably, the pressure supply mechanism includes a negative pressure pump fixedly connected to the upper end of the suspension bracket, the output end of the negative pressure pump is fixedly connected to a three-way pipe, the end of the three-way pipe away from the negative pressure pump is fixedly connected to a connecting hose, the end of the connecting hose away from the three-way pipe is fixedly connected to a diversion pipe, the circumferential surface of the diversion pipe is fixedly connected to a negative pressure pipe, the negative pressure pipe is fixedly connected to the pressure supply mold, a mounting port is fixedly connected in the pressure supply hole, and the negative pressure pipe and the mounting port are connected via a mounting head.

[0011] Preferably, a quick-release mechanism is provided on the surface of the connecting column, and the quick-release mechanism includes a pair of guide columns fixedly connected at the rear end of the connecting column, a pair of guide holes are provided in the expansion mold, and the guide columns are located in the guide holes, and a sliding groove is provided in the connecting column and the guide column, and a slider is slidably connected in the sliding groove, and a spring is fixedly connected between the slider and the sliding groove, and a push rod is fixedly connected to the surface of the slider, and the push rod is slidably connected to the connecting column, and the rear end of the slider is conical, and a telescopic groove is provided in the guide column, and a positioning block is slidably connected in the telescopic groove, and the positioning block and the push rod are slidably connected, and a tension spring is fixedly connected between the positioning blocks, and a positioning groove is provided in the expansion mold, and the positioning block is located in the positioning groove.

[0012] Preferably, a mounting groove is provided on the rear end surface of the connecting column, a sealing ring is fixedly connected in the mounting groove, and the sealing ring is located between the connecting column and the expansion mold.

[0013] Technical effects and advantages of the present invention:

[0014] 1. The present invention allows lubricating liquid to enter the main flow channel, then into the branch flow channel through the main flow channel. The lubricating liquid then flows through the branch flow channel into the groove, filling the groove with lubricating liquid. As the expansion die moves backward, the inner wall of the expanded portion of the exhaust pipe body is completely exposed to the lubricating liquid. Simultaneously, the lubricating liquid continuously enters the chute through the groove, ensuring that lubricating liquid is always present between the exhaust pipe body and the expansion die as the expansion die moves backward. This reduces the friction that increases as the contact surface between the exhaust pipe body and the expansion die rises, effectively lubricating the exhaust pipe body, improving the smoothness of the expansion process, and enhancing the processing quality of the exhaust pipe body expansion.

[0015] 2. This invention creates a negative pressure in the vacuum chamber within the supply die. This negative pressure causes the expanded portion of the exhaust pipe body to spread outward, reducing the tightness of contact between the inner surface of the expanded portion of the exhaust pipe body and the outer surface of the expansion die. This allows the expansion die to be separated from the exhaust pipe body more smoothly. Furthermore, during demolding, the negative pressure allows the exhaust pipe body to be attached to the inner wall of the supply die. This allows the exhaust pipe body to be positioned for external shape during demolding, preventing deformation of the exhaust pipe body during demolding and improving the product qualification rate of the exhaust pipe body expansion operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 Schematic diagram of the clamping mechanism of the present invention.

[0018] Figure 3 It is a schematic diagram of a partial cross-section and splitting in the present invention.

[0019] Figure 4 Schematic diagram of the liquid supply mechanism of the present invention.

[0020] Figure 5 Schematic diagram of the demoulding mechanism in the present invention.

[0021] Figure 6 It is a schematic diagram of the present invention when the pressure die is opened.

[0022] Figure 7 It is a schematic diagram of a cross-section of the die in the present invention.

[0023] Figure 8 Schematic diagram of the disassembly of the expansion mold in the present invention.

[0024] Figure 9 Schematic diagram of the quick release mechanism of the present invention.

[0025] Figure 10 It is a schematic diagram of a cross-section of the expansion die in the present invention.

[0026] The accompanying drawings are marked as follows: 1. frame; 2. positioning frame; 3. positioning seat; 301. first hydraulic cylinder; 302. connecting column; 303. guide block; 304. first guide rod; 4. clamping mechanism; 401. second hydraulic cylinder; 402. dynamic clamping block; 403. second guide rod; 404. fixed clamping block; 5. pushing mechanism; 501. connecting plate; 502. cylinder; 503. pushing block; 6. exhaust pipe body; 7. expansion mold; 8. lubrication mechanism; 801. main channel; 802. branch channel; 803. groove; 804. chute; 9. hanging frame; 10. liquid supply mechanism; 1001. liquid pump; 1002. liquid storage tank; 1003. input pipe; 1004. connecting channel; 1005. connector; 1006. output pipe; 11. support Seat; 12. Demolding mechanism; 1201. Third guide rod; 1202. Pressure supply die; 1203. Third hydraulic cylinder; 1204. Connecting seat; 1205. Sealing gasket; 1206. Vacuum groove; 1207. Pressure supply hole; 13. Pressure supply mechanism; 1301. Negative pressure pump; 1302. Tee pipe; 1303. Connecting hose; 1304. Diverter pipe; 1305. Negative pressure pipe; 1306. Mounting port; 1307. Mounting head; 14. Quick release mechanism; 1401. Guide column; 1402. Guide hole; 1403. Slide groove; 1404. Slider; 1405. Spring; 1406. Push rod; 1407. Telescopic groove; 1408. Positioning block; 1409. Tension spring; 1410. Positioning groove; 15. Mounting groove; 1501. Sealing ring. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be described clearly and completely below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The expansion machine for the exhaust pipe orifice involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] The present invention provides an expansion machine for an exhaust pipe orifice, comprising a frame 1, a positioning frame 2 and a positioning seat 3 fixedly connected to the upper end of the frame 1, a clamping mechanism 4 provided on the surface of the positioning frame 2, an exhaust pipe body 6 clamped and fixed in the clamping mechanism 4, a first hydraulic cylinder 301 fixedly connected to the front end of the positioning seat 3, a sliding connection between the output end of the first hydraulic cylinder 301 and the positioning seat 3, a connecting column 302 fixedly connected to the output end of the first hydraulic cylinder 301, a guide block 303 fixedly connected to the circumferential surface of the connecting column 302, a plurality of first guide rods 304 fixedly connected between the positioning seat 3 and the positioning frame 2, a sliding connection between the guide block 303 and the first guide rod 304, and a rear end of the connecting column 302. A swelling mold 7 is fixedly connected, and the swelling mold 7 is slidably connected to the exhaust pipe body 6. A lubricating mechanism 8 is provided in the swelling mold 7. The lubricating mechanism 8 includes a main channel 801 and a branch channel 802 opened in the swelling mold 7. The main channel 801 and the branch channel 802 are connected. A groove 803 and an inclined groove 804 are opened on the circumferential surface of the swelling mold 7. The branch channel 802 is connected to the groove 803, and the groove 803 is connected to the inclined groove 804. The lower end of the frame 1 is fixedly connected to the suspension frame 9, and the suspension frame 9 is provided with a liquid supply mechanism 10. A support seat 11 is fixedly connected between the frame 1 and the positioning frame 2. A demoulding mechanism 12 is provided on the surface of the support seat 11. When working, Place the exhaust pipe body 6 in the clamping mechanism 4, and then adjust the exhaust pipe body 6 to a suitable position. Then, by controlling the operation of the clamping mechanism 4, the exhaust pipe body 6 is positioned. Then, by controlling the operation of the first hydraulic cylinder 301, the first hydraulic cylinder 301 will drive the connecting column 302 to move backward, and the connecting column 302 will drive the expansion mold 7 to move backward. Then, the expansion mold 7 will be inserted into the pipe mouth of the exhaust pipe body 6, and then the pipe mouth of the exhaust pipe body 6 will be continuously expanded. At this time, by controlling the operation of the liquid supply mechanism 10, the lubricating liquid is transported to the main flow channel 801 opened in the expansion mold 7, and then enters the branch channel 802 through the main flow channel 801. , and then the lubricating liquid flows into the groove 803 through the branch channel 802. At this time, the groove 803 will be filled with the lubricating liquid. As the expansion mold 7 moves backward, the inner wall of the expanded part of the exhaust pipe body 6 can be completely in contact with the lubricating liquid. At the same time, the lubricating liquid will continue to enter the inclined groove 804 through the groove 803, so that in the process of the expansion mold 7 moving backward, there is always lubricating liquid between the exhaust pipe body 6 and the expansion mold 7, which has a good lubricating effect on the exhaust pipe body 6, reduces the friction between the exhaust pipe body 6 and the expansion mold 7, improves the smoothness of the exhaust pipe body 6 during the expansion processing, and improves the processing quality of the exhaust pipe body 6 expansion.

[0029] Furthermore, the clamping mechanism 4 includes a second hydraulic cylinder 401 fixedly connected to the upper end of the positioning frame 2, and the output end of the second hydraulic cylinder 401 is slidably connected to the positioning frame 2. The output end of the second hydraulic cylinder 401 is fixedly connected to a movable clamping block 402, and the upper end of the movable clamping block 402 is fixedly connected to a plurality of second guide rods 403, and the second guide rods 403 are slidably connected to the positioning frame 2. The upper end of the frame 1 is fixedly connected to a fixed clamping block 404, and the exhaust pipe body 6 is located in the fixed clamping block 404 and the movable clamping block 402. During operation, by placing the exhaust pipe body 6 in the fixed clamping block 404, and then adjusting the position of the exhaust pipe in the fixed clamping block 404, and then controlling the operation of the second hydraulic cylinder 401, the second hydraulic cylinder 401 will control the movable clamping block 402 to move downward, and then, in cooperation with the fixed clamping block 404, the effect of clamping and positioning the exhaust pipe body 6 can be achieved.

[0030] Furthermore, a pushing mechanism 5 is provided at the rear end of the fixed clamping block 404, and the pushing mechanism 5 includes a connecting plate 501 fixedly connected to the rear end of the fixed clamping block 404, and a cylinder 502 is fixedly connected to the rear end of the connecting plate 501, and the output end of the cylinder 502 is slidably connected to the connecting plate 501, and the output end of the cylinder 502 is fixedly connected to a pushing block 503, and the pushing block 503 fits with the rear end of the exhaust pipe body 6. During operation, when the exhaust pipe body 6 is placed in the fixed clamping block 404, by controlling the operation of the cylinder 502, the output end of the cylinder 502 will drive the pushing block 503 to move forward, and the pushing block 503 will push the exhaust pipe body 6 forward, and move the exhaust pipe body 6 to the processing point, thereby achieving the effect of automatic calibration of the processing position of the exhaust pipe body 6.

[0031] Furthermore, the liquid supply mechanism 10 includes a liquid pump 1001 and a liquid storage tank 1002 fixedly connected to the upper end of the suspension frame 9. The liquid storage tank 1002 is used to store lubricating liquid. The output end of the liquid pump 1001 is connected to the liquid storage tank 1002 through an input pipe 1003. A connecting flow channel 1004 is opened in the connecting column 302, and the connecting flow channel 1004 is connected to the main flow channel 801. A connector 1005 is fixedly connected to the connecting column 302, and the connector 1005 is connected to the connecting flow channel 1004. The liquid pump 100 The output end is connected to the connector 1005 via an output pipe 1006. When in operation, by controlling the operation of the liquid pump 1001, the liquid pump 1001 will quantitatively extract the lubricating liquid in the liquid storage tank 1002 through the input pipe 1003, and then, under the action of the output pipe 1006 and the connector 1005, the lubricating liquid is transported to the connecting flow channel 1004 opened in the connecting column 302, and then the lubricating liquid is transported to the main channel 801 through the connecting flow channel 1004, thereby achieving the effect of lubricating liquid transportation.

[0032] Furthermore, the demoulding mechanism 12 includes a plurality of third guide rods 1201 fixedly connected between the support seats 11, the circumferential surface of the third guide rods 1201 is slidably connected to a pair of mutually cooperating supply molds 1202, the surface of the support seat 11 is fixedly connected to a third hydraulic cylinder 1203, the output end of the third hydraulic cylinder 1203 is slidably connected to the support seat 11, the output end of the third hydraulic cylinder 1203 is fixedly connected to a connecting seat 1204, the connecting seat 1204 is fixedly connected to the supply mold 1202, and the inner wall of the supply mold 1202 is fixed. A sealing gasket 1205 is connected, and the sealing gasket 1205 is in contact with the circumference of the exhaust pipe body 6. A vacuum groove 1206 and a pressure supply hole 1207 are provided on the surface of the pressure supply die 1202. The pressure supply hole 1207 is connected to the vacuum groove 1206. The exhaust pipe body 6 is located in the vacuum groove 1206. A pressure supply mechanism 13 is provided on the upper end of the suspension bracket 9. When working, after the expansion processing of the exhaust pipe body 6 is completed, the operation of the third hydraulic cylinder 1203 is controlled. The output end of the third hydraulic cylinder 1203 will move to the exhaust pipe body 6 through the action of the connecting seat 1204. The inner side simultaneously pushes the two pressure supply dies 1202 to move, so that the pressure supply dies 1202 on the left and right sides merge to wrap the expanded part of the exhaust pipe body 6. At the same time, under the action of the sealing gasket 1205, the sealing ring 1501 fits with the surface of the exhaust pipe body 6, so that the vacuum groove 1206 of the wrapped part of the exhaust pipe body 6 can be in a vacuum state. Then the pressure supply mechanism 13 is controlled to operate to extract the air in the vacuum groove 1206, so that the vacuum groove 1206 is in a negative pressure state. At this time, under the action of the negative pressure environment, the exhaust pipe The expanded part of the main body 6 will tend to spread to the surroundings, reducing the tightness of the inner surface of the expanded part of the exhaust pipe main body 6 and the outer surface of the expansion mold 7, so that the expansion mold 7 can be separated from the exhaust pipe main body 6 more smoothly. At the same time, when the expansion mold 7 is demoulded, the exhaust pipe main body 6 can be adsorbed on the inner wall of the pressure supply mold 1202 under the action of the negative pressure environment, and the shape of the exhaust pipe main body 6 can be positioned when demoulding, thereby avoiding deformation of the exhaust pipe main body 6 during demoulding and improving the product qualification rate of the exhaust pipe main body 6 expansion operation.

[0033] Furthermore, the pressure supply mechanism 13 includes a negative pressure pump 1301 fixedly connected to the upper end of the suspension frame 9, the output end of the negative pressure pump 1301 is fixedly connected to a three-way pipe 1302, the end of the three-way pipe 1302 away from the negative pressure pump 1301 is fixedly connected to a connecting hose 1303, the end of the connecting hose 1303 away from the three-way pipe 1302 is fixedly connected to a shunt pipe 1304, the circumferential surface of the shunt pipe 1304 is fixedly connected to a negative pressure pipe 1305, the negative pressure pipe 1305 is fixedly connected to the pressure supply mold 1202, and the pressure supply hole 1207 is fixedly connected to the pressure supply mold 1202. There is a fixed connection with a mounting port 1306, and the negative pressure tube 1305 is connected to the mounting port 1306 through a mounting head 1307. When working, by controlling the operation of the negative pressure pump 1301, the negative pressure pump 1301 extracts the gas in the vacuum tank 1206 after the pressure supply mold 1202 is merged through the action of the three-way tube 1302, the connecting hose 1303, the diversion tube 1304, the negative pressure tube 1305, the mounting head 1307, the mounting port 1306 and the pressure supply hole 1207, thereby achieving a negative pressure state in the vacuum tank 1206.

[0034] Furthermore, a quick release mechanism 14 is provided on the surface of the connecting column 302. The quick release mechanism 14 includes a pair of guide columns 1401 fixedly connected to the rear end of the connecting column 302. A pair of guide holes 1402 are provided in the expansion mold 7. The guide columns 1401 are located in the guide holes 1402. A slide groove 1403 is provided in both the connecting column 302 and the guide column 1401. A slider 1404 is slidably connected in the slide groove 1403. A spring 1405 is fixedly connected between the slider 1404 and the slide groove 1403. A push rod 1406 is fixedly connected to the surface of the slider 1404. The push rod 1 406 is slidably connected with the connecting column 302, the rear end of the slider 1404 is tapered, a telescopic slot 1407 is provided in the guide column 1401, a positioning block 1408 is slidably connected in the telescopic slot 1407, the positioning block 1408 is slidably connected with the push rod 1406, a tension spring 1409 is fixedly connected between the positioning blocks 1408, a positioning slot 1410 is provided in the expansion mold 7, the positioning block 1408 is located in the positioning slot 1410, when working, by pushing the push rod 1406 forward, the push rod 1406 will drive the slider 1404 to move forward, because the slider 1 The rear end of 404 is tapered. After the slider 1404 moves forward, the tension spring 1409 will pull the upper and lower positioning blocks 1408 under the action of the tension spring 1409, so that the positioning blocks 1408 are moved out of the positioning groove 1410. At this time, the expansion mold 7 can be pushed backward, and the expansion mold 7 can be disassembled, which is convenient for maintenance and replacement of the expansion mold 7. When the expansion mold 7 needs to be reinstalled, the push rod 1406 is pushed forward first to drive the slider 1404 to move forward, so that the positioning blocks 1408 are retracted into the telescopic groove 1407, and then the expansion mold 7 is reinstalled. 7 is inserted into the guide column 1401. Under the action of the guide column 1401, the stability of the expansion mold 7 can be improved when it is fixed. Then, after the expansion mold 7 moves to the top of the guide column 1401, the positioning block 1408 will correspond to the position of the positioning groove 1410. At the same time, under the action of the spring 1405, the spring 1405 will push the slider 1404 to move backward. The slider 1404 moves backward and pushes the positioning block 1408 to the upper and lower sides, so that the positioning block 1408 is inserted into the positioning groove 1410, thereby achieving the effect of installing the expansion mold 7.

[0035] Furthermore, a mounting groove 15 is provided on the rear end face of the connecting column 302, and a sealing ring 1501 is fixedly connected in the mounting groove 15. The sealing ring 1501 is located between the connecting column 302 and the expansion mold 7. During operation, the sealing ring 1501 fixedly connected in the mounting groove 15 can fill the gap between the connecting column 302 and the expansion mold 7 after the expansion mold 7 is installed, thereby improving the sealing between the connecting channel 1004 and the main channel 801, and avoiding leakage at the connection between the connecting channel 1004 and the main channel 801 during the transportation of the lubricating liquid.

[0036] The working principle of the present invention is as follows: by placing the exhaust pipe body 6 in the fixed clamping block 404, by controlling the operation of the air cylinder 502, the output end of the cylinder 502 will drive the pushing block 503 to move forward, and the pushing block 503 will push the exhaust pipe body 6 forward, and the exhaust pipe body 6 will be moved to the processing point. Then, by controlling the operation of the second hydraulic cylinder 401, the second hydraulic cylinder 401 will control the movable clamping block 402 to move downward, and then, in cooperation with the fixed clamping block 404, the exhaust pipe body 6 is clamped and positioned. At this time, by controlling the operation of the first hydraulic cylinder 301, the first hydraulic cylinder 301 will drive the connecting column 302 to move backward, and the connecting column 302 will drive the expanding die 7 to move backward, and then the expanding die 7 will be inserted into the pipe mouth of the exhaust pipe body 6, and then the pipe mouth of the exhaust pipe body 6 will be continuously expanded. At the same time, by controlling the operation of the liquid supply mechanism 10, the liquid pump 1001 will quantitatively extract the lubricating liquid in the liquid storage tank 1002 through the input pipe 1003, Then, under the action of the output pipe 1006 and the connector 1005, the lubricating liquid is transported to the connecting flow channel 1004 opened in the connecting column 302, and then the lubricating liquid is transported to the main channel 801 through the connecting flow channel 1004, and then enters the branch flow channel 802 through the main channel 801, and then the lubricating liquid flows into the groove 803 through the branch flow channel 802. At this time, the groove 803 will be filled with the lubricating liquid, and as the expansion mold 7 moves backward, the inner wall of the expanded part of the exhaust pipe body 6 can be completely contacted with the lubricating liquid, and at the same time, the lubricating liquid will continue to enter the inclined groove 804 through the groove 803, so that in the process of the expansion mold 7 moving backward, there is always lubricating liquid between the exhaust pipe body 6 and the expansion mold 7, which has a good lubricating effect on the exhaust pipe body 6, reduces the friction between the exhaust pipe body 6 and the expansion mold 7, improves the smoothness of the expansion processing of the exhaust pipe body 6, and improves the processing quality of the expansion of the exhaust pipe body 6;

[0037] After the expansion processing of the exhaust pipe body 6 is completed, the third hydraulic cylinder 1203 is controlled to operate. At this time, the output end of the third hydraulic cylinder 1203 will push the two pressure supply dies 1202 inward at the same time under the action of the connecting seat 1204, so that the pressure supply dies 1202 on the left and right sides are merged to wrap the expansion part of the exhaust pipe body 6. At the same time, under the action of the sealing gasket 1205, the sealing ring 1501 fits with the surface of the exhaust pipe body 6, so that the vacuum groove 1206 of the wrapped part of the exhaust pipe body 6 can be in a vacuum state. Then the pressure supply mechanism 13 is controlled to operate. At this time, the negative pressure pump 1301 is connected to the three-way pipe 1302, the connecting hose 1303, the shunt pipe 1304, the negative pressure pipe 1305, the mounting head 1307, the mounting port 1306 and the pressure supply mechanism 13. Under the action of the pressure hole 1207, the gas in the vacuum groove 1206 after the supply and pressure mold 1202 is merged is extracted, so that the vacuum groove 1206 is in a negative pressure state. At this time, under the action of the negative pressure environment, the expanded part of the exhaust pipe body 6 will tend to spread to the surrounding area, reducing the tightness of the inner surface of the expanded part of the exhaust pipe body 6 and the outer surface of the expansion mold 7 body, so that the expansion mold 7 is more comfortable when it is separated from the exhaust pipe body 6. At the same time, when the expansion mold 7 is demolded, the exhaust pipe body 6 can be adsorbed on the inner wall of the supply and pressure mold 1202 under the action of the negative pressure environment, and the shape of the exhaust pipe body 6 can be positioned when demolding, thereby avoiding deformation of the exhaust pipe body 6 during demolding, and improving the product qualification rate of the exhaust pipe body 6 expansion operation;

[0038] Finally, in the subsequent maintenance of the expansion mold 7, by pushing the push rod 1406 forward, the push rod 1406 will drive the slider 1404 to move forward. Since the rear end of the slider 1404 is tapered, after the slider 1404 moves forward, under the action of the tension spring 1409, the tension spring 1409 will pull the upper and lower positioning blocks 1408, so that the positioning blocks 1408 are moved out of the positioning groove 1410. At this time, the expansion mold 7 can be pushed backward, and the expansion mold 7 can be disassembled, which is convenient for maintenance and replacement of the expansion mold 7. When the expansion mold 7 needs to be reinstalled, the push rod 1406 is first pushed forward to drive the slider 1404 to move forward, so that the positioning blocks 1408 are retracted into the telescopic groove 1407, and then the expansion mold 7 is inserted into the guide column 1401. Under the action of the guide column 1401, the fixed expansion can be improved. The stability of the mold 7 is maintained, and then after the expansion mold 7 moves to the top of the guide column 1401, the positioning block 1408 will correspond to the position of the positioning groove 1410, and at the same time, under the action of the spring 1405, the spring 1405 will push the slider 1404 to move backward, and the slider 1404 moves backward and pushes the positioning block 1408 on the upper and lower sides, so that the positioning block 1408 is inserted into the positioning groove 1410, thereby achieving the effect of installing the expansion mold 7. At the same time, the sealing ring 1501 fixedly connected in the mounting groove 15 can fill the gap between the connecting column 302 and the expansion mold 7 after the expansion mold 7 is installed, thereby improving the sealing between the connecting channel 1004 and the main channel 801, and avoiding leakage at the connection between the connecting channel 1004 and the main channel 801 during the lubricating fluid transportation.

[0039] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0040] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0041] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An expansion machine for an exhaust pipe orifice, comprising a frame (1), characterized in that: The upper end of the frame (1) is fixedly connected to a positioning frame (2) and a positioning seat (3); a clamping mechanism (4) is provided on the surface of the positioning frame (2); an exhaust pipe body (6) is clamped and fixed in the clamping mechanism (4); a first hydraulic cylinder (301) is fixedly connected to the front end of the positioning seat (3); an output end of the first hydraulic cylinder (301) is slidably connected to the positioning seat (3); a connecting column (302) is fixedly connected to the output end of the first hydraulic cylinder (301); a guide block (303) is fixedly connected to the circumferential surface of the connecting column (302); a plurality of first guide rods (304) are fixedly connected between the positioning seat (3) and the positioning frame (2); the guide block (303) is slidably connected to the first guide rod (304); a bulging die (7) is fixedly connected to the rear end of the connecting column (302); The expansion mold (7) is slidably connected to the exhaust pipe body (6); a lubricating mechanism (8) is provided in the expansion mold (7); the lubricating mechanism (8) comprises a main flow channel (801) and a branch flow channel (802) provided in the expansion mold (7); the main flow channel (801) and the branch flow channel (802) are connected; a groove (803) and an inclined groove (804) are provided on the circumferential surface of the expansion mold (7); the branch flow channel (802) is connected to the groove (803); the groove (803) is connected to the inclined groove (804); a hanging frame (9) is fixedly connected to the lower end of the frame (1); a liquid supply mechanism (10) is provided on the hanging frame (9); a support seat (11) is fixedly connected between the frame (1) and the positioning frame (2); a demoulding mechanism (12) is provided on the surface of the support seat (11); The liquid supply mechanism (10) comprises a liquid pump (1001) and a liquid storage tank (1002) fixedly connected to the upper end of the suspension frame (9); the liquid storage tank (1002) is used to store lubricating liquid; the output end of the liquid pump (1001) is connected to the liquid storage tank (1002) via an input pipe (1003); a connecting flow channel (1004) is provided in the connecting column (302); the connecting flow channel (1004) is communicated with the main flow channel (801); a connector (1005) is fixedly connected in the connecting column (302); the connector (1005) is communicated with the connecting flow channel (1004); and the output end of the liquid pump (1001) is connected to the connector (1005) via an output pipe (1006); The demoulding mechanism (12) comprises a plurality of third guide rods (1201) fixedly connected between the support seats (11); a pair of mutually matching pressure supply dies (1202) are slidably connected to the circumferential surfaces of the third guide rods (1201); a third hydraulic cylinder (1203) is fixedly connected to the surface of the support seat (11); an output end of the third hydraulic cylinder (1203) is slidably connected to the support seat (11); an output end of the third hydraulic cylinder (1203) is fixedly connected to a connecting seat (1204); and the connecting seat (12 04) is fixedly connected to the pressure supply mold (1202), the inner wall of the pressure supply mold (1202) is fixedly connected with a sealing gasket (1205), the sealing gasket (1205) is in contact with the circumferential surface of the exhaust pipe body (6), the surface of the pressure supply mold (1202) is provided with a vacuum groove (1206) and a pressure supply hole (1207), the pressure supply hole (1207) is connected with the vacuum groove (1206), the exhaust pipe body (6) is located in the vacuum groove (1206), and the upper end of the suspension frame (9) is provided with a pressure supply mechanism (13); The pressure supply mechanism (13) comprises a negative pressure pump (1301) fixedly connected to the upper end of the suspension frame (9); the output end of the negative pressure pump (1301) is fixedly connected to a three-way pipe (1302); the end of the three-way pipe (1302) away from the negative pressure pump (1301) is fixedly connected to a connecting hose (1303); the end of the connecting hose (1303) away from the three-way pipe (1302) is fixedly connected to a shunt pipe (1304); the circumferential surface of the shunt pipe (1304) is fixedly connected to a negative pressure pipe (1305); the negative pressure pipe (1305) is fixedly connected to the pressure supply die (1202); a mounting port (1306) is fixedly connected inside the pressure supply hole (1207); and the negative pressure pipe (1305) and the mounting port (1306) are connected via a mounting head (1307).

2. The expansion machine for an exhaust pipe orifice according to claim 1, characterized in that: The clamping mechanism (4) comprises a second hydraulic cylinder (401) fixedly connected to the upper end of the positioning frame (2); the output end of the second hydraulic cylinder (401) is slidably connected to the positioning frame (2); the output end of the second hydraulic cylinder (401) is fixedly connected to a movable clamping block (402); the upper end of the movable clamping block (402) is fixedly connected to a plurality of second guide rods (403); the second guide rods (403) are slidably connected to the positioning frame (2); the upper end of the frame (1) is fixedly connected to a fixed clamping block (404); and the exhaust pipe body (6) is located inside the fixed clamping block (404) and the movable clamping block (402).

3. The expansion machine for an exhaust pipe orifice according to claim 2, characterized in that: A material pushing mechanism (5) is provided at the rear end of the fixed clamp block (404), the material pushing mechanism (5) comprising a connecting plate (501) fixedly connected to the rear end of the fixed clamp block (404), a cylinder (502) fixedly connected to the rear end of the connecting plate (501), an output end of the cylinder (502) being slidably connected to the connecting plate (501), a pushing block (503) fixedly connected to the output end of the cylinder (502), and the pushing block (503) being in contact with the rear end of the exhaust pipe body (6).

4. The expansion machine for an exhaust pipe orifice according to claim 1, characterized in that: The surface of the connecting column (302) is provided with a quick release mechanism (14), and the quick release mechanism (14) includes a pair of guide columns (1401) fixedly connected to the rear end of the connecting column (302). The expansion mold (7) is provided with a pair of guide holes (1402), and the guide columns (1401) are located in the guide holes (1402). The connecting column (302) and the guide column (1401) are both provided with a slide groove (1403), and a slider (1404) is slidably connected in the slide groove (1403). A spring (1405) is fixedly connected between the slider (1404) and the slide groove (1403), and the slider (1404) is fixedly connected to the slide groove (1403). A push rod (1406) is fixedly connected to the surface of the guide post (404), the push rod (1406) is slidably connected to the connecting column (302), the rear end of the slider (1404) is conical, a telescopic groove (1407) is provided in the guide column (1401), a positioning block (1408) is slidably connected in the telescopic groove (1407), the positioning block (1408) and the push rod (1406) are slidably connected, a tension spring (1409) is fixedly connected between the positioning blocks (1408), a positioning groove (1410) is provided in the expansion mold (7), and the positioning block (1408) is located in the positioning groove (1410).

5. The expansion machine for the exhaust pipe orifice according to claim 4, characterized in that: The rear end surface of the connecting column (302) is provided with a mounting groove (15), a sealing ring (1501) is fixedly connected in the mounting groove (15), and the sealing ring (1501) is located between the connecting column (302) and the expansion die (7).

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