Hot spinning machining equipment and process for thin-wall pipe end socket

Abstract

The invention relates to the technical field of hot spinning machining of thin-wall pipe fitting end sockets, in particular to hot spinning machining equipment and technology for thin-wall pipe fitting end sockets. The hot spinning machining equipment for the thin-wall pipe fitting end socket comprises a rotary clamping mechanism and a spinning tool, the rotary clamping mechanism is used for fixing a thin-wall pipe fitting and then driving the thin-wall pipe fitting to rotate, the rotating axis of the thin-wall pipe fitting is parallel to the axial direction of the thin-wall pipe fitting, and the hot spinning machining equipment for the thin-wall pipe fitting end socket further comprises the spinning tool which is used for being attached to the side wall of the thin-wall pipe fitting end socket. The tool adjusting piece drives the spinning tool to rotate along the spinning tool so as to change the included angle between the spinning tool and the thin-wall pipe fitting, and the rotary clamping mechanism slides in a reciprocating mode in the axial direction of the thin-wall pipe fitting to be close to or away from the spinning tool. The spinning tool has the following effects that in the spinning process, the spinning tool is kept in the state of being attached to the side wall of the thin-wall pipe end socket, an elliptical arc is machined, the machining precision is improved, and the finished product quality of the thin-wall pipe end socket is improved.

Description

Technical Field

[0001] The present application relates to the technical field of hot spinning processing of thin-walled pipe heads, and in particular to a hot spinning processing device and process for thin-walled pipe heads. Background Art

[0002] Hot spinning processing equipment for thin-walled pipe heads is widely used in aviation, aerospace, automobile manufacturing and other fields, and is one of the important equipment to improve product performance and reliability. With the continuous development of modern manufacturing, the molding quality requirements for thin-walled pipe heads are becoming increasingly stringent, especially for pipes working in high-pressure and high-temperature environments, the strength and sealing of the head part are particularly critical. In order to meet this demand, hot spinning processing technology has gradually become one of the mainstream processing methods, and high-quality head molding can be achieved by precisely controlling the movement of the spinning tool.

[0003] Hot spinning technology means that before the spinning process, a certain length of the tube mouth area is preheated to a certain temperature, and then the head is processed using the spinning equipment.

[0004] At present, the end face of conventional spinning tools is relatively wide, which will cause interference when used to process elliptical thin-walled pipe heads. There is a certain gap between the spinning tool and the thin-walled pipe head, resulting in the processed arc being a straight line, affecting the processing accuracy and further affecting the finished product quality of the thin-walled pipe head. Summary of the invention

[0005] In order to improve the processing accuracy and enhance the finished product quality of thin-walled pipe heads, the present application provides a hot spinning processing device for thin-walled pipe heads.

[0006] The present application provides a hot spinning processing equipment for a thin-walled pipe head, which adopts the following technical scheme: it includes a rotating clamping mechanism, which is used to fix the thin-walled pipe and drive the thin-walled pipe to rotate, and the rotation axis of the thin-walled pipe is parallel to the axial direction of the thin-walled pipe, and also includes a spinning tool, the axial direction of the spinning tool is perpendicular to the axial direction of the thin-walled pipe, the spinning tool rotates along the axial direction of the spinning tool, and the spinning tool is used to fit the side wall of the thin-walled pipe head; it also includes a tool adjustment part, the tool adjustment part drives the spinning tool to rotate along the spinning tool to change the angle between the spinning tool and the thin-walled pipe, and the spinning tool is adjusted to rotate in a direction parallel to the radial direction of the spinning tool; the rotating clamping mechanism slides back and forth along the axial direction of the thin-walled pipe to approach or move away from the spinning tool.

[0007] By adopting the above technical solution, the tool adjustment member changes the angle between the spinning tool and the thin-walled pipe fitting, and the rotating clamping mechanism changes the distance between the spinning tool and the thin-walled pipe fitting, so that the spinning tool remains in contact with the side wall of the thin-walled pipe fitting head during the spinning process, an elliptical arc is processed, the processing accuracy is improved, and the finished product quality of the thin-walled pipe fitting head is improved.

[0008] Preferably, it also includes a detection piece, which is used to detect whether the processing accuracy of the thin-walled pipe after spinning is qualified, the rotating clamping mechanism and the detection piece are located on the same straight line and the rotating clamping mechanism and the detection piece are arranged at an interval, and the rotating clamping mechanism slides back and forth along the axial direction of the thin-walled pipe to approach or move away from the detection piece.

[0009] By adopting the above technical solution, the detection part detects whether the thin-walled pipe fitting heads formed by spinning are qualified, and distinguishes qualified products from unqualified products, and discards unqualified products, thereby improving the qualified rate of the finished products of the thin-walled pipe fitting heads, that is, improving the finished product quality of the thin-walled pipe fitting heads.

[0010] Preferably, the detection component includes a detection sleeve and a flowmeter, the detection sleeve is suitable for thin-walled pipe fittings after spinning processing, the detection sleeve is used to be mounted on the thin-walled pipe fittings, a detection cavity is opened on the wall of the detection sleeve, the detection cavity is filled with detection liquid, the end of the detection cavity away from the rotating clamping mechanism is connected to a discharge pipe, when the thin-walled pipe fitting is inserted into the detection sleeve, the detection liquid in the detection cavity is emptied, the flowmeter is connected to the discharge pipe, the flowmeter is used to monitor the flow of the detection liquid discharged from the discharge pipe, and the flowmeter is electrically connected to a controller.

[0011] By adopting the above technical scheme, the detection liquid in the detection cavity is gradually emptied during the process of inserting the thin-walled pipe fitting after spinning into the detection sleeve. The flow meter monitors the flow rate of the detection liquid discharged from the detection cavity, and the processing accuracy of the thin-walled pipe fitting is judged according to the flow rate of the detection liquid. If the amount of discharged detection liquid is less than the liquid capacity in the emptying cavity, it means that the thin-walled pipe fitting head is over-processed and needs to be discarded; if the thin-walled pipe fitting head is not processed in place, it cannot be fully inserted into the detection sleeve.

[0012] Preferably, the detection cavity is opened along the circumference of the detection sleeve, the detection cavity passes through the inner wall of the detection sleeve and the detection cavity passes through the detection sleeve axially, a rubber layer for sealing the detection cavity is provided on the detection sleeve, and the discharge pipe passes through the rubber layer and is connected to the detection cavity.

[0013] By adopting the above technical solution, the detection cavity is composed of the outer wall of the detection sleeve and the rubber layer, and the thin-walled pipe after spinning is inserted into the detection sleeve to apply pressure to the rubber layer, so that the detection liquid in the detection cavity flows out from the discharge pipe.

[0014] Preferably, one end of the detection chamber away from the rotating clamping mechanism is connected to a return pipe, and one end of the return pipe away from the detection sleeve is connected to a water tank. The water tank is connected to a pump, and the pump is used to pump the detection liquid in the water tank into the return pipe. The discharge pipe is also connected to a first one-way valve, and the first one-way valve controls the detection liquid in the detection chamber to be discharged from the detection chamber toward the discharge pipe. The return pipe is connected to a second one-way valve, and the second one-way valve controls the detection liquid in the return pipe to flow from the water tank to the detection chamber.

[0015] By adopting the above technical scheme, during the detection process, the first one-way valve is opened and the second one-way valve is closed, and the detection liquid in the detection chamber can only flow from the discharge pipe to the water tank; when the detection is completed, the first one-way valve is closed and the second one-way valve is opened, and the pump draws the detection liquid in the water tank back into the detection chamber, which not only realizes the recycling of the detection liquid, but also in the process of the detection liquid returning to the detection chamber, the thin-walled pipe fitting is pushed out of the detection sleeve, and if it is qualified, it is discharged, and if it is unqualified, it is discarded.

[0016] Preferably, the rotating clamping mechanism includes a clamping sleeve and a sleeve adjusting piece, the clamping sleeve and the thin-walled pipe fitting are coaxially arranged and the clamping sleeve is used to be sleeved on the thin-walled pipe fitting, the sleeve adjusting piece is used to drive the clamping sleeve to slide axially along the clamping sleeve towards or away from the detection piece, at least two clamping blocks are provided on the clamping sleeve, a plurality of the clamping blocks are arranged at equal angles along the circumference of the clamping sleeve in the clamping sleeve, the clamping blocks are connected to the inner wall of the clamping sleeve in a radially positionable reciprocating sliding manner along the clamping sleeve, and the side wall of the clamping block away from the inner wall of the clamping sleeve is used to contact the outer wall of the thin-walled pipe fitting.

[0017] By adopting the above technical solution, after the thin-walled tube is pushed out of the detection sleeve by the detection liquid that flows back into the detection chamber, the clamping sleeve approaches until it is sleeved on the thin-walled tube, and after the clamping block contacts the outer wall of the thin-walled tube, the clamping sleeve slides in the direction away from the detection sleeve to pull the thin-walled tube out of the detection sleeve.

[0018] Preferably, it also includes a spray mechanism, which is used to spray coolant toward the thin-walled pipe after the spinning process, and the spray mechanism is arranged between the detection member and the rotating clamping mechanism along the axial direction of the thin-walled pipe.

[0019] By adopting the above technical solution, the spray mechanism is arranged between the detection part and the rotating clamping mechanism, which not only cools the head of the thin-walled pipe fitting after hot spinning, reduces the influence of high temperature on the rubber layer in the detection sleeve, and improves the service life of the rubber layer; the coolant covers the outer wall of the thin-walled pipe fitting, reduces the friction between the outer wall of the thin-walled pipe fitting and the rubber layer, and reduces the wear on the rubber layer and the thin-walled pipe fitting.

[0020] Preferably, the spray mechanism includes a coolant tank and at least two spray heads, the coolant tank is used to supply coolant to the spray heads, the spray heads are directed toward the thin-walled pipe fittings after spinning, the two spray heads are respectively located above and below the thin-walled pipe fittings, the spray heads are rotatably arranged, the rotation axis of the spray heads is parallel to the axial direction of the spinning tool, and the two spray heads rotate in opposite directions.

[0021] By adopting the above technical solution, when it is necessary to spray and cool the thin-walled pipe head, the two spray heads rotate closer to each other. After spraying, the two spray heads rotate away from each other to make way for the sliding of the rotating clamping mechanism.

[0022] The application also discloses a hot spinning process for a thin-walled pipe end cap.

[0023] A hot spinning process for thin-walled pipe end caps is realized by using the above-mentioned hot spinning process equipment for thin-walled pipe end caps. The following steps are involved: S1, installing the spinning tool; S2. Clamp the cold thin-walled pipe fitting on the rotating clamping mechanism, and reserve a positioning length of 300 mm from the mouth of the thin-walled pipe fitting to the rotating clamping mechanism; S3, use the closing machine to assist the heating gun to heat the mouth of the thin-walled pipe fitting, and the heating temperature is controlled at 1000℃; S4, starting spinning from 100 mm away from the mouth of the thin-walled pipe fitting, the spinning tool is attached to the side wall of the thin-walled pipe fitting head, and the spinning tool and the thin-walled pipe fitting are rotated to perform spinning processing; S5. Use a lathe to carve an inner hole with a center diameter of 70 mm at the mouth of the thin-walled pipe fitting and polish the outer surface.

[0024] By adopting the above technical solution, the spinning process is started from 100 mm away from the mouth of the thin-walled pipe fitting, which reduces the probability of wrinkling and instability of the thin-walled pipe fitting during hot spinning.

[0025] Preferably, step S4 comprises: S41, after 6 passes, it is stretched forward into a cone; S42, the finished product is obtained by 7 passes of reverse extrusion.

[0026] By adopting the above technical solution and using the hot spinning and reverse extrusion molding methods, the probability of thin-walled pipes being easily cracked during the spinning process is reduced.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. Keep the spinning tool in close contact with the side wall of the thin-walled pipe head during the spinning process to produce an elliptical arc, improve the processing accuracy, and improve the quality of the finished product of the thin-walled pipe head; 2. The spinning process starts from 100mm away from the mouth of the thin-walled pipe fitting, which reduces the probability of wrinkling and instability of the thin-walled pipe fitting during hot spinning; 3. The use of hot spinning and reverse extrusion molding methods reduces the probability of cracking of thin-walled pipes during spinning processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a hot spinning processing equipment for a thin-walled pipe head in the present application; Figure 2 It is a schematic diagram of the overall structure of a hot spinning processing equipment for a thin-walled pipe head in the present application from another perspective; Figure 3 It is a schematic diagram of the related structures and connection relationship of a spinning tool and a tool adjustment member in a hot spinning processing equipment for a thin-walled pipe end cap in the present application; Figure 4 It is a cross-sectional schematic diagram of a spinning tool and a thin-walled pipe-related structure and their positional relationship in a hot spinning processing equipment for a thin-walled pipe head in the present application; Figure 5 It is a cross-sectional schematic diagram of a detection sleeve in a hot spinning processing equipment for a thin-walled pipe head in the present application; Figure 6 It is a cross-sectional schematic diagram of a rotary clamping mechanism in a hot spinning processing equipment for a thin-walled pipe end cap in the present application; Figure 7 It is a schematic diagram of the process steps of a hot spinning process for a thin-walled pipe end cap in the present application; Figure 8 This is a schematic diagram of step S41 in a hot spinning process for a thin-walled pipe end cap in the present application; Fig. 9 It is a schematic diagram of step S42 in a hot spinning process for a thin-walled pipe end cap in the present application; Description of the accompanying drawings: 1, thin-walled pipe fitting; 110, spinning tool; 111, spinning wheel; 112, spinning tool seat; 113, spinning motor; 114, dust cover; 115, avoidance opening; 120, tool adjustment member; 121, adjustment seat; 122, adjustment slide; 123, adjustment motor; 124, rotating arm; 125, adjustment screw; 130, rotating clamping mechanism; 131, clamping sleeve; 132, sleeve adjustment member; 133, clamping base; 134, clamping base; 135, clamping block; 136, clamping cylinder; 137, clamping cylinder; 138, clamping cylinder; 139, clamping cylinder; 140, clamping cylinder; 141, clamping cylinder; 142, clamping cylinder; 143, clamping cylinder; 144, clamping cylinder; 145, clamping block; 146, clamping cylinder; 147, clamping cylinder; 148, clamping cylinder; 149, clamping cylinder; 150, clamping cylinder; 151, clamping cylinder; 152, clamping cylinder; 153, clamping cylinder; 154, clamping cylinder; 155, clamping block; 156, clamping cylinder; 157, clamping cylinder; 158, clamping cylinder; 159, clamping cylinder; 160, clamping cylinder; 161, clamping cylinder; 162, clamping cylinder; 163, clamping cylinder; 164, clamping cylinder; 165, clamping cylinder; 166, clamping cylinder; 167, clamping cylinder; 168, clamping cylinder; 169, clamping cylinder; 170, clamping cylinder; 171, clamping cylinder; 172, clamping cylinder 7. Embedded groove; 140. Detection piece; 141. Detection sleeve; 142. Flow meter; 143. Detection chamber; 144. Rubber layer; 145. Discharge pipe; 146. Reflux pipe; 147. Water tank; 148. Pump; 151. First non-return valve; 152. Second non-return valve; 160. Push cylinder; 161. Drive motor; 162. Output gear; 163. Transmission gear; 170. Discharge conveyor belt; 180. Spraying mechanism; 181. Coolant tank; 182. Spray head; 183. Spray head motor; 184. Meshing gear. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] The application discloses a hot spinning processing device for a thin-walled pipe end cap, which is used to improve the processing accuracy and the quality of the finished product of the thin-walled pipe end cap.

[0031] refer to Figure 1 , Figure 2 and Figure 3 A hot spinning processing equipment for a thin-walled pipe head includes a rotating clamping mechanism 130, a spinning tool 110 and a tool adjusting member 120. The rotating clamping mechanism 130 is used to fix the thin-walled pipe 1 and drive it to rotate. The rotation axis of the thin-walled pipe 1 is parallel to the axial direction of the thin-walled pipe 1. The spinning tool 110 is used to fit the side wall of the head of the thin-walled pipe 1. The axial direction of the spinning tool 110 is perpendicular to the axial direction of the thin-walled pipe 1 and rotates along the axial direction of the spinning tool 110. The rotating clamping mechanism 130 slides back and forth along the axial direction of the thin-walled pipe 1 to approach or move away from the spinning tool 110.

[0032] In this embodiment, the spinning tool 110 includes a spinning wheel 111 and a spinning tool seat 112. The axis of the spinning wheel 111 is perpendicular to the axis of the thin-walled pipe fitting 1. A spinning motor 113 is arranged on the spinning tool seat 112. A first transmission rod (not shown in the figure) is embedded in the spinning tool seat 112. One end of the first transmission rod is coaxially connected to the output shaft of the spinning motor 113, and the other end of the first transmission rod is coaxially connected to the spinning wheel 111. When the spinning motor 113 works, it transmits force to the spinning wheel 111 through the transmission shaft, driving the spinning wheel 111 to rotate to spin the thin-walled pipe fitting 1.

[0033] The tool adjustment member 120 drives the spinning tool 110 to rotate along the spinning tool 110 to change the angle between the spinning tool 110 and the thin-walled pipe fitting 1. The spinning tool 110 is adjusted to rotate in a direction parallel to the radial direction of the spinning tool 110. The tool adjustment member 120 includes an adjustment seat 121, an adjustment slide seat 122 and an adjustment motor 123. The adjustment slide seat 122 is provided with a rotating arm 124. One side of the rotating arm 124 is detachably connected to the spinning tool seat 112. The other side of the rotating arm 124 is used to be coaxially connected to the output shaft of the adjustment motor 123. The adjustment motor 123 is arranged on the adjustment seat On 121, a second transmission rod (not shown in the figure) is embedded in the adjusting slide 122, one end of the second transmission rod is vertically connected to the rotating arm 124, and the second transmission rod vertically passes through the adjusting seat 121 and is coaxially connected to the output shaft of the adjusting motor 123; an adjusting screw 125 is also provided on the adjusting seat 121, the adjusting screw 125 is connected to the adjusting slide 122 and drives the adjusting slide 122 to slide reciprocally in a positionable manner in the vertical direction and is connected to the adjusting seat 121, correspondingly, a sliding groove (not shown in the figure) is penetrated along the axial direction of the second transmission rod on the adjusting seat 121 for the sliding of the second transmission rod.

[0034] refer to Figure 1 , Figure 3 and Figure 4 The conventional spinning wheel 111 has a wider end face and is suitable for processing non-elliptical heads. For heads that are elliptical with a length-to-short ratio of 2, interference will occur during processing. There is a gap between the spinning wheel 111 and the elliptical thin-walled pipe fitting 1 head, and the processed arc is a straight line rather than an ellipse; the tool adjustment member 120 changes the angle between the spinning tool 110 and the thin-walled pipe fitting 1, and at the same time, the rotating clamping mechanism 130 changes the spacing between the spinning tool 110 and the thin-walled pipe fitting 1, so that the spinning tool 110 remains in contact with the side wall of the thin-walled pipe fitting 1 head during the spinning process, and an elliptical arc is processed, an elliptical head is accurately processed, the processing accuracy is improved, and the finished product quality of the thin-walled pipe fitting 1 head is improved.

[0035] refer to Figure 1 and Figure 2The rotating clamping mechanism 130 includes a clamping sleeve 131 and a sleeve adjusting member 132. The clamping sleeve 131 and the thin-walled pipe 1 are coaxially arranged and the clamping sleeve 131 is used to be sleeved on the thin-walled pipe 1. The sleeve adjusting member 132 is used to drive the clamping sleeve 131 to slide axially along the clamping sleeve 131 to approach or move away from the spinning tool 110. At least two clamping blocks 135 are arranged on the clamping sleeve 131. The plurality of clamping blocks 135 are arranged in the clamping sleeve 131 at equal angles along the circumferential direction of the clamping sleeve 131. The clamping blocks 135 are reciprocatingly slidably connected to the inner wall of the clamping sleeve 131 in a radially positionable manner along the clamping sleeve 131. The clamping blocks 135 are far away from the inner wall of the clamping sleeve 131. The side wall away from the inner wall of the clamping sleeve 131 is used to abut against the outer wall of the thin-walled pipe 1. In the present embodiment, a total of five clamping blocks 135 are provided, and a clamping cylinder 136 is penetrated radially along the clamping sleeve 131. A total of five clamping cylinders 136 are penetrated, and the five clamping cylinders 136 correspond to the five clamping blocks 135 one by one. The five clamping cylinders 136 are penetrated on the wall of the clamping sleeve 131 at equal angles along the circumference of the clamping sleeve 131. The piston rod of the clamping cylinder 136 is vertically connected to the clamping block 135. The clamping cylinder 136 drives the clamping block 135 to slide back and forth in a positionable manner along the radial direction of the clamping sleeve 131.

[0036] In addition, reference Figure 1 and Figure 5 The present embodiment further includes a detection member 140 for detecting whether the machining accuracy of the thin-walled pipe fitting 1 after the spinning process is qualified. The detection member 140 includes a detection sleeve 141 and a flow meter 142. The detection sleeve 141 is adapted to the thin-walled pipe fitting 1 after the spinning process and is used to be sleeved on the thin-walled pipe fitting 1. A detection cavity 143 is opened on the wall of the detection sleeve 141. The detection cavity 143 is filled with a detection liquid. The detection cavity 143 is opened along the circumference of the detection sleeve 141. The detection cavity 143 passes through the inner wall of the detection sleeve 141 and the detection cavity 143 passes through the detection sleeve 141 axially. A rubber layer 144 for sealing the detection cavity 143 is provided on the detection sleeve 141, that is, the detection cavity 143 is composed of the outer wall of the detection sleeve 141 and the rubber layer 144.

[0037] Furthermore, the detection member 140 and the rotating clamping mechanism 130 are located on the same straight line and the rotating clamping mechanism 130 and the detection member 140 are arranged at intervals. The rotating clamping mechanism 130 also includes a clamping base 133 and a clamping base 134. The clamping base 133 is arranged on the clamping base 134. In the present embodiment, the sleeve adjusting member 132 is a linear motor. The length direction of the linear motor is arranged along the axial direction of the thin-walled pipe 1. The sleeve adjusting member 132 is arranged on the clamping base 134. The clamping base 133 is arranged on the sleeve adjusting member 132. A side wall of the clamping base 133 close to the detection member 140 is provided with an embedding groove 137 for embedding the clamping sleeve 131.

[0038] refer to Figure 1 , Figure 2 and Figure 5 The end of the detection chamber 143 away from the rotating clamping mechanism 130 is connected to a discharge pipe 145 and a return pipe 146. The discharge pipe 145 and the return pipe 146 are both connected to the detection chamber 143 through the rubber layer 144. The return pipe 146 is connected to a water tank 147 at one end away from the detection sleeve 141. The water tank 147 is connected to a pump 148. The pump 148 is used to pump the detection liquid in the water tank 147 into the return pipe 146. The discharge pipe 145 is connected to a first one-way valve 151. The first one-way valve 151 controls the detection. The detection liquid in the detection cavity 143 is discharged from the detection cavity 143 toward the discharge pipe 145. The reflux pipe 146 is connected to a second one-way valve 152. The second one-way valve 152 controls the detection liquid in the reflux pipe 146 to flow from the water tank 147 to the detection cavity 143. In addition, the flow meter 142 is connected to the discharge pipe 145 to monitor the flow of the detection liquid discharged from the discharge pipe 145. The flow meter 142 is electrically connected to a controller. The controller determines whether the processing accuracy of the thin-walled pipe 1 is qualified according to the signal of the flow meter 142.

[0039] The thin-walled pipe fitting 1 after spinning is inserted into the detection sleeve 141, and the rubber layer 144 is compressed. During the insertion into the detection sleeve 141, the detection liquid in the detection chamber 143 is gradually emptied. During the detection process, the first one-way valve 151 is opened and the second one-way valve 152 is closed. The detection liquid in the detection chamber 143 can only flow from the discharge pipe 145 to the water tank 147. The flow meter 142 monitors the flow rate of the detection liquid discharged from the detection chamber 143. The processing accuracy of the thin-walled pipe fitting 1 is judged according to the flow rate of the detection liquid. If the amount of the discharged detection liquid is small, the detection liquid in the detection chamber 143 is discharged. The liquid capacity in the emptying cavity indicates that the end cap of the thin-walled pipe fitting 1 is over-processed and needs to be discarded; if the end cap of the thin-walled pipe fitting 1 is not processed in place, it cannot be fully inserted into the detection sleeve 141; when the detection is completed, the first one-way valve 151 is closed, the second one-way valve 152 is opened, and the pump 148 draws the detection liquid in the water tank 147 back into the detection cavity 143, which not only realizes the recycling of the detection liquid, but also in the process of the detection liquid returning to the detection cavity 143, the thin-walled pipe fitting 1 is pushed out of the detection sleeve 141, and if it is qualified, it is discharged, and if it is unqualified, it is discarded.

[0040] refer to Figure 1 , Figure 6In order to achieve the effect of pushing the thin-walled pipe 1 out of the detection sleeve 141, the clamping base 133 is provided with a pushing cylinder 160 along the axial direction of the thin-walled pipe 1. The pushing cylinder 160 is embedded in the clamping base 133. The piston rod of the pushing cylinder 160 passes through the bottom of the embedding groove 137 to be connected with the clamping sleeve 131. Specifically, a driving motor 161 is also embedded in the clamping base 133. An output gear 162 is coaxially connected to the output shaft of the driving motor 161. The output gear 162 is embedded in the clamping base 133. A transmission gear 163 is also embedded in the clamping base 133. The transmission gear 163 and the output gear 162 is meshed and connected, and the push cylinder 160 is inserted into the transmission gear 163, and the drive motor 161 works to drive the clamping sleeve 131 to drive the thin-walled pipe fitting 1 to rotate and perform spinning processing; when the thin-walled pipe fitting 1 is pushed into the detection sleeve 141, the push cylinder 160 works to push the thin-walled pipe fitting 1 from the clamping sleeve 131 into the detection sleeve 141; when the thin-walled pipe fitting 1 is pushed out from the detection sleeve 141, the clamping sleeve 131 approaches the detection sleeve 141 until it is sleeved on the thin-walled pipe fitting 1, and after the clamping block 135 contacts the outer wall of the thin-walled pipe fitting 1, the push cylinder 160 works to pull the thin-walled pipe fitting 1 out of the detection sleeve 141.

[0041] Furthermore, a discharge conveyor belt 170 is arranged between the inspection sleeve 141 and the spinning clamping mechanism. The length direction of the discharge conveyor belt 170 is perpendicular to the axial direction of the thin-walled pipe fitting 1. The cylinder 160 is pushed to pull the thin-walled pipe fitting 1 out of the inspection sleeve 141 and place it on the discharge conveyor belt 170. The discharge conveyor belt 170 can rotate forward or reverse, so that the inspected thin-walled pipe fittings 1 can be discharged from both ends of the discharge conveyor belt 170, one end is for discharging unqualified products, and the other end is for discharging qualified products.

[0042] In addition, reference Figure 1 and Figure 2 The present embodiment further includes a spray mechanism 180, which is used to spray coolant toward the thin-walled tube 1 after the spinning process to reduce the temperature of the thin-walled tube 1. The spray mechanism 180 is axially arranged between the detection member 140 and the rotating clamping mechanism 130 along the thin-walled tube 1. The spray mechanism 180 includes a coolant tank 181 and at least two spray heads 182. The coolant tank 181 is used to supply coolant to the spray heads 182. The spray heads 182 face the thin-walled tube 1 after the spinning process. The two spray heads 182 are respectively located above and below the thin-walled tube 1. The spray heads 182 can use atomizing nozzles to achieve uniform coolant spraying.

[0043] The spray mechanism 180 is arranged between the detection member 140 and the rotating clamping mechanism 130, which not only cools the head of the thin-walled pipe fitting 1 after hot spinning, reduces the influence of high temperature on the rubber layer 144 in the detection sleeve 141, and increases the service life of the rubber layer 144; the coolant covers the outer wall of the thin-walled pipe fitting 1, reduces the friction between the outer wall of the thin-walled pipe fitting 1 and the rubber layer 144, and reduces the wear on the rubber layer 144 and the thin-walled pipe fitting 1.

[0044] Furthermore, the spray head 182 is rotatably arranged, and the rotation axis of the spray head 182 is parallel to the axial direction of the spinning tool 110. The two spray heads 182 rotate in opposite directions. In this embodiment, a dust cover 114 is provided on the spinning tool 110, and the dust cover 114 covers the spinning tool 110 and the tool adjustment member 120. The coolant tank 181 is arranged on one side of the dust cover 114, and the two spray heads 182 are arranged on one side wall of the dust cover 114. The dust cover 114 is provided with a spray The head motor 183 drives the two spray heads 182 to rotate simultaneously through two meshing gears 184 connected in meshing relationship. The two spray heads 182 rotate in opposite directions. When the thin-walled pipe 1 needs to be cooled by spraying, the two spray heads 182 rotate toward each other. After spraying, the two spray heads 182 rotate away from each other to make way for the sliding of the rotating clamping mechanism 130. Similarly, the dust cover 114 is penetrated with an avoidance opening 115 for the rotating clamping mechanism 130 to pass through.

[0045] The implementation principle of the hot spinning processing equipment for thin-walled pipe heads in the embodiment of the present application is as follows: during the spinning process, the spinning tool 110 keeps in contact with the side wall of the thin-walled pipe head 1 to process an elliptical arc, accurately process an elliptical head, improve the processing accuracy, and improve the finished product quality of the thin-walled pipe head 1; the thin-walled pipe 1 after spinning is inserted into the detection sleeve 141, and the rubber layer 144 is compressed. During the insertion into the detection sleeve 141, the detection liquid in the detection cavity 143 is gradually emptied, and the flow meter 142 monitors the flow rate of the detection liquid discharged from the detection cavity 143. The processing accuracy of the thin-walled pipe 1 is judged according to the flow rate of the detection liquid. If the amount of detection liquid discharged is less than the liquid capacity in the emptied cavity, it is said that It is clear that the end cap of the thin-walled pipe fitting 1 is over-processed and needs to be discarded; if the end cap of the thin-walled pipe fitting 1 is not processed in place, it cannot be fully inserted into the detection sleeve 141 and also needs to be discarded; when the detection is completed, the pump 148 draws the detection liquid in the water tank 147 back into the detection chamber 143, and the thin-walled pipe fitting 1 is pushed out from the detection sleeve 141, and the clamping sleeve 131 is close to the detection sleeve 141 until it is sleeved on the thin-walled pipe fitting 1. After the clamping block 135 contacts the outer wall of the thin-walled pipe fitting 1, the cylinder 160 is pushed to work and pull the thin-walled pipe fitting 1 out of the detection sleeve 141 and onto the discharge conveyor belt 170, so that the tested thin-walled pipe fitting 1 can be discharged from both ends of the discharge conveyor belt 170, one end of which is for discharging unqualified products and the other end is for discharging qualified products.

[0046] refer to Figure 7 , Figure 8 and Fig. 9 A hot spinning process for a thin-walled pipe end cap is implemented by using the hot spinning process equipment for a thin-walled pipe end cap, and includes the following steps: S1, installing the spinning tool 110; S2. Clamp the cold thin-walled pipe 1 on the rotating clamping mechanism 130, and reserve a positioning length of 300 mm from the mouth of the thin-walled pipe 1 to the rotating clamping mechanism 130; S3, using the closing machine to assist the heating gun to heat the mouth of the thin-walled pipe fitting 1, and the heating temperature is controlled at 1000°C; S4, starting spinning from 100 mm away from the mouth of the thin-walled pipe fitting 1, the spinning tool 110 is attached to the side wall of the end cap of the thin-walled pipe fitting 1, and the spinning tool 110 and the thin-walled pipe fitting 1 are rotated to perform spinning processing; S5. Use a lathe to carve an inner hole of Φ70mm at the end of the thin-walled pipe fitting 1 and polish the outer surface.

[0047] The spinning process is started from 100 mm away from the mouth of the thin-walled pipe 1, which reduces the probability of the thin-walled pipe 1 being prone to wrinkling and instability during hot spinning.

[0048] Wherein, step S4 comprises: S41, after 6 passes, it is stretched forward into a cone; S42, the finished product is obtained by 7 passes of reverse extrusion.

[0049] The hot spinning and reverse extrusion molding methods reduce the probability of cracking of the thin-walled pipe 1 during the spinning process.

[0050] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hot spinning processing device for a thin-walled pipe end cap, comprising a rotating clamping mechanism (130), wherein the rotating clamping mechanism (130) is used to fix a thin-walled pipe (1) and drive the thin-walled pipe (1) to rotate, wherein the rotation axis of the thin-walled pipe (1) is parallel to the axial direction of the thin-walled pipe (1), and further comprising a spinning tool (110), wherein the axial direction of the spinning tool (110) is perpendicular to the axial direction of the thin-walled pipe (1), and the spinning tool (110) rotates along the axial direction of the spinning tool (110), characterized in that: The spinning tool (110) is used to fit the side wall of the end cap of the thin-walled pipe (1); it also includes a tool adjustment member (120), the tool adjustment member (120) drives the spinning tool (110) to rotate along the spinning tool (110) to change the angle between the spinning tool (110) and the thin-walled pipe (1), and the spinning tool (110) is adjusted to rotate in a direction parallel to the radial direction of the spinning tool (110); the rotary clamping mechanism (130) slides back and forth along the axial direction of the thin-walled pipe (1) to approach or move away from the spinning tool (110).

2. The hot spinning processing equipment for thin-walled pipe heads according to claim 1, characterized in that: It also comprises a detection member (140), the detection member (140) being used to detect whether the processing accuracy of the thin-walled pipe (1) after the spinning process is qualified, the rotating clamping mechanism (130) and the detection member (140) being located on the same straight line and the rotating clamping mechanism (130) and the detection member (140) being arranged at a distance, and the rotating clamping mechanism (130) slidingly reciprocatingly along the axial direction of the thin-walled pipe (1) approaches or moves away from the detection member (140).

3. The hot spinning processing equipment for thin-walled pipe heads according to claim 2, characterized in that: The detection member (140) comprises a detection sleeve (141) and a flow meter (142); the detection sleeve (141) is adapted to be mounted on the thin-walled pipe (1) after a spinning process; the detection sleeve (141) is used to be mounted on the thin-walled pipe (1); a detection cavity (143) is provided on the wall of the detection sleeve (141); the detection cavity (143) is filled with a detection liquid; one end of the detection cavity (143) away from the rotating clamping mechanism (130) is connected to a discharge pipe (145); when the thin-walled pipe (1) is inserted into the detection sleeve (141), the detection liquid in the detection cavity (143) is emptied; the flow meter (142) is connected to the discharge pipe (145); the flow meter (142) is used to monitor the flow rate of the detection liquid discharged from the discharge pipe (145); and the flow meter (142) is electrically connected to a controller.

4. The hot spinning processing equipment for thin-walled pipe heads according to claim 3 is characterized in that: The detection cavity (143) is opened along the circumference of the detection sleeve (141); the detection cavity (143) penetrates the inner wall of the detection sleeve (141); and the detection cavity (143) penetrates the detection sleeve (141) axially along the detection sleeve (141); a rubber layer (144) for sealing the detection cavity (143) is provided on the detection sleeve (141); and the discharge pipe (145) passes through the rubber layer (144) and is connected to the detection cavity (143).

5. The hot spinning processing equipment for thin-walled pipe heads according to claim 4, characterized in that: One end of the detection chamber (143) away from the rotating clamping mechanism (130) is connected to a return pipe (146), and one end of the return pipe (146) away from the detection sleeve (141) is connected to a water tank (147). The water tank (147) is connected to a pump (148), and the pump (148) is used to pump the detection liquid in the water tank (147) into the return pipe (146). The discharge pipe (145) is also connected to a first one-way valve (151), and the first one-way valve (151) controls the detection liquid in the detection chamber (143) to be discharged from the detection chamber (143) toward the discharge pipe (145). The return pipe (146) is connected to a second one-way valve (152), and the second one-way valve (152) controls the detection liquid in the return pipe (146) to flow from the water tank (147) into the detection chamber (143).

6. The hot spinning processing equipment for thin-walled pipe heads according to claim 2, characterized in that: The rotary clamping mechanism (130) comprises a clamping sleeve (131) and a sleeve adjusting member (132); the clamping sleeve (131) and the thin-walled pipe (1) are coaxially arranged and the clamping sleeve (131) is used to be sleeved on the thin-walled pipe (1); the sleeve adjusting member (132) is used to drive the clamping sleeve (131) to slide along the axial direction of the clamping sleeve (131) to approach or move away from the detection member (140); and a There are at least two clamping blocks (135), and a plurality of the clamping blocks (135) are arranged in the clamping sleeve (131) at equal angles along the circumference of the clamping sleeve (131). The clamping blocks (135) are connected to the inner wall of the clamping sleeve (131) in a reciprocating sliding manner along the radial direction of the clamping sleeve (131) and can be positioned. The side wall of the clamping block (135) away from the inner wall of the clamping sleeve (131) is used to abut against the outer wall of the thin-walled pipe (1).

7. The hot spinning processing equipment for thin-walled pipe heads according to claim 2, characterized in that: It also comprises a spray mechanism (180), the spray mechanism (180) being used to spray cooling liquid onto the thin-walled pipe (1) after the spinning process, the spray mechanism (180) being arranged between the detection member (140) and the rotating clamping mechanism (130) along the axial direction of the thin-walled pipe (1).

8. The hot spinning processing equipment for thin-walled pipe heads according to claim 7, characterized in that: The spray mechanism (180) comprises a coolant tank (181) and at least two spray heads (182); the coolant tank (181) is used to supply coolant to the spray heads (182); the spray heads (182) face the thin-walled pipe (1) after the spinning process; the two spray heads (182) are respectively located above and below the thin-walled pipe (1); the spray heads (182) are rotatably arranged; the rotation axis of the spray heads (182) is parallel to the axial direction of the spinning tool (110); and the two spray heads (182) rotate in opposite directions.

9. A hot spinning process for a thin-walled pipe end cap, implemented by using a hot spinning process for a thin-walled pipe end cap according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, installing the spinning tool (110); S2, clamping the cold thin-walled pipe (1) on the rotating clamping mechanism (130), and leaving a positioning length of 300 mm from the mouth of the thin-walled pipe (1) to the rotating clamping mechanism (130); S3, using a closing machine to assist a heating gun to heat the mouth of the thin-walled pipe (1), and controlling the heating temperature at 1000° C.; S4, starting spinning from 100 mm away from the mouth of the thin-walled pipe (1), the spinning tool (110) is attached to the side wall of the end cap of the thin-walled pipe (1), and the spinning tool (110) and the thin-walled pipe (1) are rotated to perform the spinning process; S5. Use a lathe to carve an inner hole with a center diameter of 70 mm at the mouth of the thin-walled pipe (1), and polish the outer surface.

10. The hot spinning process for thin-walled pipe heads according to claim 9, characterized in that: The step S4 comprises: S41, after 6 passes, it is stretched forward into a cone; S42, the finished product is obtained by 7 passes of reverse extrusion.

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