Opening expanding machine for exhaust pipe orifice

Abstract

The invention relates to the technical field of pipeline opening expanding machining, in particular to an exhaust pipe opening expanding machine which comprises a rack, a positioning frame and a positioning seat are fixedly connected to the upper end of the rack, a clamping mechanism is arranged on the surface of the positioning frame, a first hydraulic cylinder is fixedly connected to the front end of the positioning seat, and a connecting column is fixedly connected to the output end of the first hydraulic cylinder. The rear end of the connecting column is fixedly connected with an opening expanding die, a main runner and a branch runner are formed in the opening expanding die, a groove and an inclined groove are formed in the circumferential face of the opening expanding die, lubricating liquid is conveyed into the main runner through the lubricating mechanism, then the lubricating liquid sequentially enters the branch runner and the groove, and in the backward moving process of the opening expanding die, the lubricating liquid flows into the groove. According to the exhaust pipe body expanding device, the lubricating liquid is arranged in the inclined groove, so that the expanded part of the exhaust pipe body is in complete contact with the lubricating liquid, meanwhile, the lubricating liquid continuously enters the inclined groove and is filled between the exhaust pipe body and the expanding mold, a good lubricating effect on the exhaust pipe body is achieved, the smoothness of the exhaust pipe body during expanding machining is improved, and the machining quality of the exhaust pipe body during expanding machining is improved.

Description

Technical Field

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

[0002] The exhaust pipe is a part of the engine exhaust system. The exhaust system mainly includes the exhaust manifold, exhaust pipe and muffler. Generally, the three-way catalytic converter for controlling the emission of engine pollutants 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 of the pipe fittings need to be expanded. The pipe fittings are usually hollow thin metal tubes.

[0003] The shortcomings of the existing technology are as follows: 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 completely 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 are fixedly connected to the upper end of the frame, a clamping mechanism is arranged on the surface of the positioning frame, an exhaust pipe body is clamped and fixed in the clamping mechanism, a first hydraulic cylinder is fixedly connected to the front end of the positioning seat, a sliding connection is made between the output end of the first hydraulic cylinder and the positioning seat, a connecting column is fixedly connected to the output end of the first hydraulic cylinder, a guide block is fixedly connected to the circumferential surface of the connecting column, a plurality of first guide rods are fixedly connected between the positioning seat and the positioning frame, and a sliding connection is made between the guide block and the first guide rod The rear end of the connecting column is fixedly connected to an expansion mold, the expansion mold is slidably connected to the exhaust pipe body, a lubrication mechanism is arranged in the expansion mold, the lubrication mechanism includes a main flow channel and a branch flow channel opened in the expansion mold, the main flow channel and the branch flow channel are connected, a groove and an oblique groove are opened on the circumferential surface of the expansion mold, the branch flow channel is connected to the groove, the groove is connected to the oblique groove, the lower end of the frame is fixedly connected to a suspension frame, the suspension frame is provided with a liquid supply mechanism, a support seat is fixedly connected between the frame and the positioning frame, and a demoulding mechanism is arranged on the surface of the support seat; 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 movable clamping block, the upper end of the movable 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 movable clamping block.

[0006] 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 fits with the rear end of the exhaust pipe body.

[0007] 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 is connected to the liquid storage tank via an input pipe, a connecting channel is opened in the connecting column, the connecting channel is connected to the main channel, a connecting head is fixedly connected in the connecting column, the connecting head is connected to the connecting channel, and the output end of the liquid pump and the connecting head are connected via an output pipe.

[0008] 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 with a pair of mutually cooperating supply and pressure dies, the surface of the support seat is fixedly connected with a third hydraulic cylinder, the output end of the third hydraulic cylinder is slidably connected with the support seat, the output end of the third hydraulic cylinder is fixedly connected with a connecting seat, the connecting seat and the supply and pressure die are fixedly connected, a sealing gasket is fixedly connected to the inner wall of the supply and pressure 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 and pressure die, the pressure supply hole is connected with 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 frame.

[0009] Preferably, the pressure supply mechanism includes a negative pressure pump fixedly connected to the upper end of the suspension frame, 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 shunt pipe, the circumferential surface of the shunt 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.

[0010] 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, the guide columns are located in the guide holes, and sliding grooves are provided in both the connecting column and the guide column, a slider is slidably connected in the sliding groove, a spring is fixedly connected between the slider and the sliding groove, a push rod is fixedly connected to the surface of the slider, the push rod is slidably connected to the connecting column, the rear end of the slider is conical, a telescopic groove is provided in the guide column, a positioning block is slidably connected in the telescopic groove, the positioning block and the push rod are slidably connected, a tension spring is fixedly connected between the positioning blocks, a positioning groove is provided in the expansion mold, and the positioning block is located in the positioning groove.

[0011] Preferably, a mounting groove is formed 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.

[0012] Technical effects and advantages of the present invention: 1. The present invention allows the lubricating liquid to enter the main channel, then enter the branch channel through the main channel, and then flow into the groove through the branch channel. At this time, the groove will be filled with the lubricating liquid. As the expansion die moves backward, the inner wall of the expanded part of the exhaust pipe body can be completely contacted with the lubricating liquid. At the same time, the lubricating liquid will continuously enter the inclined groove through the groove. As the expansion die moves backward, the exhaust pipe body and the expansion die are always in contact with the lubricating liquid, which can reduce the friction force increased with the increase of the contact surface between the exhaust pipe body and the expansion die, and have a good lubricating effect on the exhaust pipe body, so that the fluency of the exhaust pipe body expansion processing is improved, and the processing quality of the exhaust pipe body expansion is improved.

[0013] 2. The present invention makes the vacuum groove in the pressure supply mold in a negative pressure state. At this time, under the action of the negative pressure environment, the expanded part of the exhaust pipe body will tend to spread to the surroundings, reducing the fit between the inner surface of the expanded part of the exhaust pipe body and the outer surface of the expansion mold body, so that the expansion mold can be separated from the exhaust pipe body more comfortably. At the same time, when the expansion mold is demolded, under the action of the negative pressure environment, the exhaust pipe body can be adsorbed on the inner wall of the pressure supply mold, and the shape of the exhaust pipe body can be positioned when demolding, so as to avoid deformation of the exhaust pipe body during demolding, and improve the product qualification rate of the exhaust pipe body expansion operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the clamping mechanism in the present invention.

[0016] Figure 3It is a schematic diagram of a partial cross-section split in the present invention.

[0017] Figure 4 It is a schematic diagram of the liquid supply mechanism in the present invention.

[0018] Figure 5 It is a schematic diagram of the demoulding mechanism in the present invention.

[0019] Figure 6 It is a schematic diagram of the present invention when the pressure die is opened.

[0020] Figure 7 It is a schematic diagram for a cross-sectional view of the die in the present invention.

[0021] Figure 8 It is a schematic diagram of the disassembly of the expansion mold in the present invention.

[0022] Fig. 9 It is a schematic diagram of the quick release mechanism in the present invention.

[0023] Fig.10 It is a schematic diagram of a cross-section of the expansion mold in the present invention.

[0024] 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. moving clamp block; 403. second guide rod; 404. fixed clamp block; 5. pushing mechanism; 501. connecting plate; 502. cylinder; 503. pushing block; 6. exhaust pipe body; 7. expansion mold; 8. lubrication mechanism; 801. main flow channel; 802. branch flow channel; 803. groove; 804. inclined groove; 9. hanging frame; 10. liquid supply mechanism; 1001. liquid pump; 1002. liquid storage tank; 1003. input pipe; 1004. connecting flow channel; 1005. connector; 1006. output pipe; 11. support Seat; 12, demoulding mechanism; 1201, third guide rod; 1202, pressure supply mold; 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, three-way pipe; 1303, connecting hose; 1304, shunt pipe; 1305, negative pressure pipe; 1306, installation port; 1307, installation 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, installation groove; 1501, sealing ring. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The expansion machine for the exhaust pipe outlet involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0026] 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 are fixedly connected to the upper end of the frame 1, a clamping mechanism 4 is arranged 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, and a rear end of the connecting column 302 is fixedly connected to the positioning frame 2. A bulging mold 7 is fixedly connected, and the bulging mold 7 is slidably connected to the exhaust pipe body 6. A lubricating mechanism 8 is arranged in the bulging mold 7. The lubricating mechanism 8 includes a main flow channel 801 and a branch flow channel 802 opened in the bulging mold 7. The main flow channel 801 and the branch flow channel 802 are connected. A groove 803 and an inclined groove 804 are opened on the circumferential surface of the bulging mold 7. The branch flow 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 a hanging frame 9, and a liquid supply mechanism 10 is arranged on the hanging frame 9. A support seat 11 is fixedly connected between the frame 1 and the positioning frame 2, and a demoulding mechanism 12 is arranged on the surface of the support seat 11. When working, through The exhaust pipe body 6 is placed in the clamping mechanism 4, and then the exhaust pipe body 6 is adjusted to a suitable position. The exhaust pipe body 6 is positioned by controlling the clamping mechanism 4 to operate. Then, the first hydraulic cylinder 301 is controlled to operate, and the first hydraulic cylinder 301 drives the connecting column 302 to move backward. The connecting column 302 drives the expansion mold 7 to move backward. Then, the expansion mold 7 is inserted into the pipe mouth of the exhaust pipe body 6, and then the pipe mouth of the exhaust pipe body 6 is continuously expanded. At this time, the lubricating liquid is transported to the main flow channel 801 opened in the expansion mold 7 by controlling the operation of the liquid supply mechanism 10, and then enters the branch flow channel 802 through the main flow channel 801. 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 in contact 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.

[0027] Furthermore, the clamping mechanism 4 includes 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, and the upper end of the frame 1 is fixedly connected to a fixed clamping block 404, the exhaust pipe body 6 is located in the fixed clamping block 404 and the movable clamping block 402. When working, 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.

[0028] 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, a cylinder 502 is fixedly connected to the rear end of the connecting plate 501, and an output end of the cylinder 502 is slidably connected to the connecting plate 501, and a pushing block 503 is fixedly connected to the output end of the cylinder 502, 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 automatically calibrating the processing position of the exhaust pipe body 6.

[0029] 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 channel 1004 is opened in the connecting column 302, and the connecting channel 1004 is connected to the main channel 801, and a connector 1005 is fixedly connected in the connecting column 302, and the connector 1005 is connected to the connecting channel 1004. The output end is connected to the connector 1005 through the output pipe 1006. When working, 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 the lubricating liquid is transported to the connecting flow channel 1004 opened in the connecting column 302 through the action of the output pipe 1006 and the connector 1005, and then the lubricating liquid is transported to the main flow channel 801 through the connecting flow channel 1004, thereby achieving the effect of lubricating liquid transportation.

[0030] Furthermore, the demoulding mechanism 12 includes a plurality of third guide rods 1201 fixedly connected between the support seats 11, a pair of mutually matching supply and compression molds 1202 are slidably connected on the circumferential surface 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, a connecting seat 1204 is fixedly connected to the output end of the third hydraulic cylinder 1203, the connecting seat 1204 is fixedly connected to the supply and compression mold 1202, and the inner wall of the supply and compression mold 1202 is fixedly connected. A sealing gasket 1205 is connected, and the sealing gasket 1205 is in contact with the circumferential surface 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 mold 1202. The pressure supply hole 1207 is connected with 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 frame 9. When working, after the expansion processing of the exhaust pipe body 6 is completed, the third hydraulic cylinder 1203 is controlled to operate. Under the action of the connecting seat 1204, the output end of the third hydraulic cylinder 1203 will move to The inner side 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, making it easier for the expansion mold 7 to separate from the exhaust pipe main body 6. 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 supply die 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.

[0031] 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, one end of the three-way pipe 1302 away from the negative pressure pump 1301 is fixedly connected to a connecting hose 1303, one 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. A mounting port 1306 is fixedly connected, and the negative pressure tube 1305 is connected to the mounting port 1306 via 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 mold 1202 is combined through the three-way tube 1302, the connecting hose 1303, the shunt 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.

[0032] Furthermore, a quick release mechanism 14 is provided on the surface of the connecting column 302, and 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, and 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, and the push rod 1 406 is slidably connected with the connecting column 302, the rear end of the slider 1404 is conical, 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, and 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. The rear end of 404 is conical. 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 the 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 block 1408 retracts 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 stability of fixing the expansion mold 7 can be improved. 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.

[0033] 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. When working, 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 delivery of the lubricating fluid.

[0034] The working principle of the present invention is as follows: by placing the exhaust pipe body 6 in the fixed clamp block 404, by controlling the operation of the air cylinder 502, the output end of the cylinder 502 will drive the push block 503 to move forward, and the push block 503 will push the exhaust pipe body 6 forward, and the exhaust pipe body 6 will be moved to the processing point, and then by controlling the operation of the second hydraulic cylinder 401, the second hydraulic cylinder 401 will control the movable clamp block 402 to move downward, and then in cooperation with the fixed clamp block 404, the effect of clamping and positioning the exhaust pipe body 6 is completed. 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 expansion mold 7 to move backward, and 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 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, the lubricating liquid is transported to the connecting flow channel 1004 opened in the connecting column 302 through the output pipe 1006 and the connector 1005, and then the lubricating liquid is transported to the main flow channel 801 through the connecting flow channel 1004, and then enters the branch flow channel 802 through the main flow channel 801, and then the lubricating liquid flows into the groove 803 through the branch flow channel 802, and then 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, the exhaust pipe body 6 and the expansion mold 7 are always in contact with the lubricating liquid, 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, and improves the fluency of the exhaust pipe body 6 during the expansion processing, thereby improving the processing quality of the expansion of the exhaust pipe body 6; After the expansion processing of the exhaust pipe body 6 is completed, the third hydraulic cylinder 1203 is controlled to operate. The output end of the third hydraulic cylinder 1203, through the action of the connecting seat 1204, will simultaneously push the two supply and pressure dies 1202 to move inward, so that the supply and pressure 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 through 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 supply Under the action of the pressure hole 1207, the gas in the vacuum groove 1206 after the supply and pressure mold 1202 is combined 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 diffuse to the surroundings, 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, so as to avoid deformation of the exhaust pipe body 6 during demolding, and improve the product qualification rate of the exhaust pipe body 6 expansion operation; 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 to move the positioning blocks 1408 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 the 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 block 1408 retracts 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 expansion mold 7 is then ensured. 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 will move backward to push 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, through the sealing ring 1501 fixedly connected in the mounting groove 15, after the expansion mold 7 is installed, it can fill the gap between the connecting column 302 and the expansion mold 7, improve the sealing between the connecting channel 1004 and the main channel 801, and avoid leakage at the connection between the connecting channel 1004 and the main channel 801 during the delivery of the lubricating fluid.

[0035] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; 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 protection scope 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) opened 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 opened 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).

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 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).

5. The expansion machine for an exhaust pipe orifice according to claim 1, characterized in that: 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 a pressure supply mechanism (13) is provided at the upper end of the suspension frame (9).

6. The expansion machine for the exhaust pipe orifice according to claim 5, characterized in that: 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).

7. 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).

8. The expansion machine for the exhaust pipe opening according to claim 7, 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).

Images