Processing die and pipe processing apparatus

Abstract

The application discloses a machining die and a pipe machining device, which comprises a main body part and a cutter head part. In the radial direction parallel to the main body part, the cutter head part is at least partially protruded from the main body part. The bottom of the cutter head part is provided with a first arc edge and a second arc edge. The bottom of the cutter head part is provided with a first edge and a second edge. The first edge is connected with the first arc edge and the second arc edge. The second edge is connected with the first arc edge and the second arc edge. The center line of the main body part has a projection center point P at the bottom of the cutter head part. The maximum distance between the center point P and the first arc edge is defined as a first distance R. A circle O is made with the center point P as the center and the first distance R as the radius. The first edge and the second edge fall within the range of the circle O. The application has simple structure and low machining cost.

Description

Technical Field

[0001] This invention relates to the field of machining, and more specifically to a processing equipment for molds and pipe fittings. Background Technology

[0002] In some systems with multiple pipelines, welding between main and branch pipelines is necessary due to the different main and branch lines. A flange is machined into the middle wall of one pipeline for welding and fixing to another. This flanged structure requires drilling with a cutting tool, then switching to a flanging tool to create the flange. This equipment needs a rotating base with two stations at the machine head. The drill bit and flanging tool are rotatably connected to the rotating base. When drilling is needed, the drill bit is rotated and the machine head is lowered to drill into the pipe. Then, the drill bit is pulled up, and the flanging tool is switched to and inserted into the hole. Finally, the flanging tool is rotated and the machine head is raised, flanging the edge of the hole to form the flange.

[0003] Because this type of equipment requires drill bits and drilling tools, the structure of the machine head is relatively complex, and there are many processing steps involved. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and low-cost processing mold and pipe fitting processing equipment.

[0005] To achieve the above objectives, the following technical solution is adopted:

[0006] A machining mold includes a main body and a cutting head. In a radial direction parallel to the main body, the cutting head at least partially protrudes from the main body. The cutting head has at least a first arcuate portion and a second arcuate portion. The first arcuate portion has a first arcuate edge at the bottom of the cutting head, and the second arcuate portion has a second arcuate edge at the bottom of the cutting head. The bottom of the cutting head has a first edge and a second edge, the first edge connecting the first arcuate edge and the second arcuate edge, and the second edge connecting the first arcuate edge and the second arcuate edge.

[0007] The center line of the main body has a projection center point P at the bottom of the cutter head. The maximum distance between the first arc edge and the center point P and the maximum distance between the second arc edge and the center point P are equal. The maximum distance between the center point P and the first arc edge is defined as the first distance R. A circle O is drawn with the center point P as the center and the first distance R as the radius. The first edge and the second edge fall within the range of circle O.

[0008] The blade head has a third arc portion, the third arc portion has a first connecting portion and a second connecting portion, the first connecting portion is connected to the main body portion, the second connecting portion is connected to the first arc portion, the length direction of the main body portion is defined as the height direction H, and along the height direction H, the first connecting portion is higher than the second connecting portion.

[0009] To achieve the above objectives, the following technical solutions are also adopted:

[0010] A pipe fitting processing device includes a base and a processing head, wherein the base is fixed with a pipe fitting fixing mechanism, characterized in that: the processing head includes a driving component and a processing mold, the processing mold and the driving component are fixed, and the driving component can drive the processing mold to lift and / or rotate; the processing mold is as described in the above technical solution.

[0011] The aforementioned processing mold has a main body and a cutting head. The cutting head has a first arc and a second arc. The bottom of the cutting head has a first arc edge and a second arc edge. The maximum distance between the first arc edge and the center point P and the maximum distance between the second arc edge and the center point P are equal. The maximum distance between the center point P and the first arc edge is defined as a first distance R. A circle O is drawn with the center point P as the center and the first distance R as the radius. The first edge and the second edge fall within the range of circle O. Thus, when the processing mold is used for punching, it can form a punch with the same shape as the bottom of the cutting head. Due to the special shape of the punch, the third arc of the cutting head can be used to roll the periphery of the punch to form a flange during the rotation of the processing mold. The processing mold has a simple structure and low manufacturing cost.

[0012] The aforementioned pipe fitting processing equipment can achieve the purpose of punching and drawing holes using the aforementioned processing molds. It has a simple structure and low manufacturing cost. Attached Figure Description

[0013] Figure 1 This is a partial schematic diagram of a pipe fitting processing equipment according to the present invention;

[0014] Figure 2 for Figure 1 A partial schematic diagram of another view of the pipe fitting processing equipment shown;

[0015] Figure 3 for Figure 1 A partial schematic diagram of the fixing mechanism for the central tube fitting;

[0016] Figure 4 for Figure 1 A side view of the central tube fixing mechanism;

[0017] Figure 5 for Figure 1Top view of the fixing mechanism for the central tube fitting;

[0018] Figure 6 for Figure 1 A schematic diagram showing the connection between the drive component and the machining mold;

[0019] Figure 7 This is a side view of a processing mold according to the present invention;

[0020] Figure 8 for Figure 7 A bottom view of the machining mold shown;

[0021] Figure 9 for Figure 7 A top view of the machining mold shown;

[0022] Figure 10 for Figure 7 A side view of the machining mold shown;

[0023] Figure 11 for Figure 7 The diagram shown illustrates the processing steps of the machining mold on the pipe fitting to be processed.

[0024] Figure 12 This is a bottom view schematic diagram of another processing mold according to the present invention;

[0025] Figure 13 This is a bottom view schematic diagram of another processing mold of the present invention;

[0026] Figure 14 This is a bottom view schematic diagram of another processing mold according to the present invention;

[0027] Figure 15 This is a top view schematic diagram of another processing mold according to the present invention.

[0028] 10 Pipe fitting processing equipment, 11 Base, 12 Pipe fitting fixing mechanism, 13 Processing head, 131 Drive component, 132 Processing mold, 133 Servo motor, 134 Rotary motor;

[0029] 1321 Main body, 1322 Cutting head, 1323 First arc, 1324 Edge, 1325 Second arc, 1326 Third arc, 1326a First connecting part, 1326b Second connecting part, 1327 Fourth arc;

[0030] 15 First arc edge, 16 Second arc edge, 17 Screw, 18a First edge, 18b Second edge

[0031] 121 First gripper fixing mechanism, 122 Second gripper fixing mechanism, 123 Third gripper fixing mechanism, 124 Core rod, 125 First groove, 126 Second groove, 127 Third groove, 128 Fourth groove, 13 First hole, 14 Second hole;

[0032] 20 pipe fittings to be processed Detailed Implementation

[0033] Reference Figures 1-5 , Figures 1-5 A schematic diagram of a pipe fitting processing device 10 is shown. The device includes a base 11, on which a pipe fitting fixing mechanism 12 and a processing head 13 are fixed. The processing head 13 includes a drive component 131 and a processing mold 132. The processing mold 132 is fixed to the drive component 131 and is liftable and rotatable. Figure 1 The servo motor 133, which moves in the Y direction, and the rotary motor 134, which has rotational motion, provide the machining mold 132 with up-and-down motion and / or rotational motion in the Y direction.

[0034] The pipe fitting fixing mechanism 12 includes a first gripper fixing mechanism 121 and a second gripper fixing mechanism 122. The first gripper fixing mechanism 121 and the second gripper fixing mechanism 122 have movements perpendicular to the lifting direction of the processing mold 132. Figure 1 As shown in the diagram, the first gripper fixing mechanism 121 and the second gripper fixing mechanism 122 have movements perpendicular to the inside and outside of the paper. The first gripper fixing mechanism 121 and the second gripper fixing mechanism 122 are arranged opposite to each other. When clamping the tube to be processed 20, the first gripper fixing mechanism 121 and the second gripper fixing mechanism 122 move towards each other. When releasing the tube to be processed 20, the first gripper fixing mechanism 121 and the second gripper fixing mechanism 122 move away from each other.

[0035] The pipe fixing mechanism 12 also includes a third clamping clamp fixing mechanism 123, which is used to fix the pipe to be processed 20. The third clamping clamp fixing mechanism 123 clamps and fixes the pipe to be processed 20. The first clamping clamp fixing mechanism 121, the second clamping clamp fixing mechanism 122, and the third clamping clamp fixing mechanism 123 can firmly fix the pipe to be processed 20, preventing it from shifting during processing and affecting the accuracy of punching.

[0036] The first gripper fixing mechanism 121 has a first groove 125, and the second gripper fixing mechanism 122 has a second groove 126. The first groove 125 and the second groove 126 cooperate to form a circular through hole, which is defined as the first hole 13. The first hole 13 penetrates the first gripper fixing mechanism and the second gripper fixing mechanism.

[0037] The first gripper fixing mechanism 121 has a third groove 127 extending from its upper surface and communicating with the first groove 125. The second gripper fixing mechanism 122 has a fourth groove 128 extending from its upper surface and communicating with the second groove 126. The third groove 127 and the fourth groove 128 cooperate to form a hole, which is defined as the second hole 14. The processing mold 132 can move up and down in the second hole 14 formed by the cooperation of the third groove 127 and the fourth groove 128, that is, move in the Y direction. On the one hand, the first gripper fixing mechanism 121 and the second gripper fixing mechanism 122 provide fixation for one end of the tube 20 to be processed. On the other hand, the third groove 127 and the fourth groove 128 are provided on the upper part of the first gripper fixing mechanism 121 and the second gripper fixing mechanism 122 for the insertion of the processing mold 132, which facilitates the accurate positioning and accurate processing of the processing mold 132.

[0038] The first and second grooves are semi-circular, and the first hole is used to accommodate the pipe fitting to be processed. The third groove 127 and the fourth groove 128 can be semi-circular, square, or other shapes. The second hole 14 formed by the third groove 127 and the fourth groove 128 is smaller than the outer shape of the cutting head 1322 of the processing mold 132, so that the processing mold 132 can extend into the second hole 14 formed by the third groove 127 and the fourth groove 128 to process the pipe fitting 20.

[0039] The drive unit of the servo motor 133 is fixed to the rotary motor 134. The rotating shaft of the rotary motor 134 is fixed to the processing mold 132. The processing mold 132 moves up and down under the action of the servo motor 133 and rotates under the action of the rotating shaft of the motor. The pipe processing equipment 10 has a punching process and a hole-drawing process. In the punching process, the processing mold 132 moves downward to punch holes in the pipe to be processed by the pipe processing equipment 10. In the hole-drawing process, the processing mold 132 rotates upward.

[0040] In this embodiment, the fixing of the processing mold 132 and the drive component 131 includes a detachable connection method, such as fixing with nuts or locking with limiting pins. (See reference...) Figure 6 The processing mold 132 and the drive component 131 can be fixed by screws 17. By fixing the processing mold 132 with screws at at least two locations, the position of the processing mold 132 is locked. Since the processing mold 132 is a consumable and is prone to breakage during processing, the detachable connection method facilitates subsequent maintenance and replacement. In addition, the processing mold 132 has a simple structure and low replacement cost.

[0041] The pipe fitting fixing mechanism 12 also includes a mandrel 124, which is located inside the third gripper fixing mechanism 123. The mandrel 124 is located in the first hole formed by the first groove 125 and the second groove 126, and the mandrel 124 can move in the first hole. The mandrel 124 can be used as a support for the pipe fitting processing equipment 10 during the punching process.

[0042] In the punching process, at least a portion of the mandrel 124 is located below the processing die 132, and the mandrel 124 extends below the second hole 14. When the processing die 132 moves downward to the second hole 14 and punches the pipe fitting 20 to be processed, the mandrel 124 is fitted inside the pipe fitting 20. In the drawing process, the processing die 132 moves upward, the mandrel 124 moves away from below the processing die 132, the processing die 132 extends downward into the second hole 14 and enters the punched hole of the pipe fitting 20, and rotates upward. That is, the mandrel has a first working position and a second working position. In the punching process, the mandrel is in the first working position, and at least a portion of the mandrel is located below the second hole. In the drawing process, the mandrel is in the second working position, the mandrel moves towards the third gripper fixing mechanism, and the mandrel moves away from below the processing die.

[0043] The pipe fitting processing equipment 10 can be used to process various metal pipes. In use, the pipe fitting 20 to be processed is first placed on the mandrel 124. The first clamping mechanism 121 and the second clamping mechanism 122 abut against each other, so that the pipe fitting 20 to be processed is located in the circular through hole formed by the first groove 125 and the second groove 126. Above the pipe fitting 20 to be processed, the third groove 127 and the fourth groove 128 cooperate to form the second hole 14. The processing mold 132 moves downward and enters the second hole 14. The processing mold 132 punches a hole in the pipe fitting 20 to be processed. Then the processing mold 132 moves upward, the mandrel 124 leaves the position corresponding to the second hole, the processing mold 132 moves downward and enters the punched hole in the pipe fitting 20 to be processed, and rotates and rises, so that the peripheral wall of the punched hole in the pipe fitting 20 to be processed forms an upward flange. The mandrel 124 helps the processing die 132 to provide good support when punching the pipe, reduces the deformation of the pipe 20 under punching, maintains the appearance and integrity of the pipe 20, and helps to form the punch.

[0044] Reference Figures 7-10 , Figures 7-10This illustration shows a specific embodiment of a machining mold 132. The machining mold 132 includes an integrally formed main body 1321 and a cutting head 1322. In a radial direction T parallel to the main body 1321, at least a portion of the cutting head 1322 protrudes from the main body 1321. The cutting head 1322 has at least a first arcuate portion 1323 and a second arcuate portion 1325. In the radial direction T parallel to the main body 1321, the first arcuate portion 1323 and the second arcuate portion 1325 protrude relative to the main body 1321. 23 and the second arc portion 1325 have a first arc edge 15 and a second arc edge 16 at the bottom of the cutter head 1322. The cutter head 1322 has an edge portion 1324. The edge portion 1324 has a first edge 18a and a second edge 18b at the bottom of the cutter head. The first edge 18a connects the first arc edge 15 and the second arc edge 16. The second edge 18b connects the first arc edge 15 and the second arc edge 16. The distance between the first arc edge 15 and the second arc edge 16 is greater than the distance between the first edge 18a and the second edge 18b.

[0045] The blade head 1322 has a third arc portion 1326 and a fourth arc portion 1327. The third arc portion 1326 is defined to have a first connecting portion 1326a and a second connecting portion 1326b. The fourth arc portion 1327 has a third connecting portion 1327a and a fourth connecting portion 1327b. The length direction of the main body 1321 is defined as the height direction H. The blade head 1322 is defined as low. Along the height direction H, the first connecting portion 1326a is higher than the second connecting portion 1326b. The first connecting portion 1326a is connected to the main body 1321. The second connecting portion 1326b is connected to the first arc portion 1323. The third connecting portion 1327a is connected to the main body 1321. The fourth connecting portion 1327b is connected to the second arc portion 1325.

[0046] The length direction of the main body 1321 is defined as the height direction H. Along the height direction H, a portion of the first connecting portion 1326a is higher than the second connecting portion 1326b. The center extension line of the main body is defined to pass through the blade head. In the radial direction parallel to the main body 1321, the distance between the second connecting portion 1326b and the center extension line C of the main body 1321 is greater than the distance between the first connecting portion 1326a and the center extension line C of the main body. The distance between the fourth connecting portion 1327b and the center extension line C of the main body is greater than the distance between the third connecting portion 1327a and the center extension line of the main body 1321.

[0047] The center line of the main body 1321 has a projection center point P at the bottom of the cutter head 1322. The maximum distance between the center point P and the first arc edge 15 is defined as the first distance R. A circle O is drawn with the center point P as the center and the first distance R as the radius. The first edge 18a and the second edge 18b fall within the range of the circle O.

[0048] The distance between the first arc edge 15 and the second arc edge 16 is defined as the second distance D1. The length direction L of the cutting head 1322 is defined as the extension direction of the second distance D1. The width direction of the cutting head 1322 is defined as the width direction W. The distance of the cutting head 1322 in the width direction W is defined as the third distance D2. The second distance D1 is greater than the third distance D2. The distance between the first arc edge 15 and the second arc edge 16 refers to the maximum distance between them. The distance of the cutting head 1322 in the width direction W is the maximum distance of the cutting head 1322 in the width direction W. The length of the main body 1321 in the length direction L is less than the second distance D1 of the cutting head 1322.

[0049] Because the second distance D1 in the length direction L of the cutting head 1322 of the processing die 132 is greater than the third distance D2 in the width direction W, when the processing die 132 is punched into the pipe, a punch hole that matches the shape of the cutting head 1322 will be formed. The outer peripheral wall of the cutting head 1322 has a third arc portion 1326 and a fourth arc portion 1327. In the height direction H, the third arc portion 1326 integrally connects the first arc portion 1323 and the main body portion 1321, and the fourth arc portion 1327 integrally connects the second arc portion and the main body portion 1321. The third arc portion 1326 and the fourth arc portion 1327 can be used to flange the wall of the punch hole formed on the pipe. Due to the difference in the second distance D1 and the third distance D2 of the outer dimensions of the cutting head 1322 of the processing die 132, when the processing die 132 enters the punching hole and rotates upward to form the flange, the third arc portion 1326 and the fourth arc portion 1327 can pull out the wall corresponding to the punching hole to form the flange. This results in a higher flange, making it easier to weld the flanged pipe fitting to other pipe fittings in the future. The processing die 132 has a simple structure, is easy to manufacture, and has low cost.

[0050] The processing die 132 has a unique structure, enabling simultaneous punching and drawing. During the punching and drawing process, the processing die 132 is simple to operate. Through control settings, when punching is required, the processing die 132 moves up and down; when drawing is required, the processing die 132 rotates and rises. The structure of the processing die 132 has a first arc portion 1323 and a second arc portion 1325. During the drawing process, the first arc portion 1323 and the second arc portion 1325 are more conducive to compressing the wall corresponding to the punched hole, forming a higher flange.

[0051] This pipe fitting processing equipment 10 innovatively designs the structure and process of the processing mold 132, enabling the entire equipment to simultaneously perform punching and drawing with only one processing mold 132. This solves the technical problem of complex structures and cumbersome manufacturing processes associated with multiple processing heads in current pipe fitting processing equipment. Previously, drawing mechanisms typically used a single drill bit for drilling, which produced numerous burrs. When drawing was needed, the machine head was rotated to switch to a drawing head, which was then inserted into the drilled hole. Because the size of the drawing head was equal to or slightly smaller than the size of the drilled hole, the resulting flange was relatively small. This short flange structure made subsequent welding to other pipes prone to leakage, affecting the connection. Furthermore, the drilled hole had many burrs, requiring further burr removal, increasing the number of processing steps. To achieve a larger flange formed by drilling, some drilling devices have additional drilling pins extending from the drill bit. This structure allows for simultaneous drilling and drilling. When drilling is required, the drill bit rotates downwards, forming a circular hole in the pipe. When drilling is needed, two drilling pins extend outwards from the drill bit. As the drill bit rotates upwards, the two drilling pins protrude from the circular hole, causing the wall corresponding to the circular hole to form a downward flange. This drilling device can create a large flange, but the structure of the drilling bit with drilling pins results in a high cost due to the design and control of the drilling pins. Many such drill bits utilize imported technology and are very expensive.

[0052] The 132 machining mold structure was changed from drilling to punching, which also reduced the burr problem during the machining process.

[0053] Along the height direction H, the first arc portion 1323 and the second arc portion 1325 have a certain height. This facilitates the compression and drawing of the wall portion corresponding to the punch during the drawing process.

[0054] The third arc portion 1326 and the fourth arc portion 1327 are both smooth arc surfaces. The third arc portion 1326 connects the first arc portion 1323 and the main body portion 1321 in an arc shape, and the fourth arc portion 1327 connects the second arc portion 1325 and the main body portion 1321. During the rotational ascent, the first arc portion 1323 and the second arc portion 1325 compress the peripheral wall corresponding to the punch hole, while the third arc portion 1326 and the fourth arc portion 1327 pull the peripheral wall corresponding to the punch hole. Because the machining die 132 has a small stroke during rotational ascent, the simultaneous pulling action of these two parts is more conducive to forming a complete and high flange on the peripheral wall corresponding to the punch hole, resulting in a neater edge. During the pulling ascent, the third arc portion 1326 rotates and rises to pull the wall corresponding to the punch hole of the fitting. The arc shape facilitates the pulling process, resulting in a smoother flange and a more aesthetically pleasing appearance.

[0055] The distance of the main body 1321 in the width direction W is defined as the fourth distance D3, where the fourth distance D3 ≤ the third distance D2. The distance of the main body 1321 in the length direction L is less than the second distance D1, and the distance of the main body 1321 in the width direction W is less than the third distance D2. The structure of the main body 1321 is smaller than that of the cutting head 1322, so that when the main body 1321 extends into the punch hole, it does not affect the drawing and flanging formation. The main body 1321 can be square, cylindrical, elliptical, or a structure with different sizes at both ends, such as a variable-diameter cylinder. The main body 1321 can also have other structural forms.

[0056] In this text, the centerline of the main body 1321 does not refer to the central axis of the main body 1321 in a narrow sense. When the main body 1321 has a centrally symmetrical structure, such as a cylindrical shape, the center of the cylinder can be considered the centerline of the main body 1321. When the main body 1321 has an asymmetrical structure, the center of the main body 1321 refers to the center of the rotation shaft of the rotating motor 134. The radial direction of the main body is perpendicular to the centerline of the main body. When its center is the center of the rotation shaft of the rotating motor, the radial direction of the main body is perpendicular to the center of the rotation shaft.

[0057] The second distance D1 is the maximum distance between the first arc side 15 and the second arc side 16.

[0058] Reference Figure 8 The bottom of the cutter head is elliptical. The dashed circle in the figure is the projection position of the main body on the cutter head. To more clearly define the positions of the first edge and the second edge, two auxiliary lines Z and Z' are drawn. The auxiliary lines Z and Z' are drawn with P as the center and the extension line of the first distance R from P to the first arc edge as the direction. The first arc edge 15 and the second arc edge 16 are located on the side of Z and Z' away from P, and the first edge 18a and the second edge 18b are located between Z and Z'.

[0059] In this embodiment, the second distance D1 is defined as the major axis of the ellipse, and the third distance D2 is defined as the minor axis of the ellipse; the length of the main body 1321 in the direction of the minor axis of the ellipse is the same as that of the third distance D2.

[0060] Reference Figure 11 , Figure 11The diagram illustrates the drawing process of the processing die 132. The processing die 132 punches a hole 30 into the pipe fitting 20 to be processed. The shape of the hole 30 is consistent with the bottom shape of the processing die 132. The processing die 132 enters the hole 30 at the same position as when punching. After the processing die 132 enters the hole 30 of the pipe fitting 20 to be processed, by rotating the processing die 132, the peripheral wall of the hole is formed with a flange facing outward of the pipe fitting during the rotation and upward process. The flange has a certain height, so that the flange of the pipe fitting can be welded and fixed to other pipe fittings later.

[0061] Reference Figure 12 and Figure 13 As another implementation method, Figures 12-13 A schematic diagram of the processing mold 132 is shown. The processing mold 132 includes an integrally formed main body 1321 and a cutting head 1322. The outer peripheral wall of the cutting head 1322 has a first arc portion 1323, a second arc portion 1325, and an edge portion 1324. The center extension line of the main body 1321 has a projection center point P at the bottom of the cutting head. The maximum distance between the first arc edge 15 and the center point P is equal to the maximum distance between the second arc edge 16 and the center point P. The maximum distance between the center point P and the first arc edge 15 is defined as the first distance R. A circle O is drawn with the center point P as the center and the first distance R as the radius. The first edge 18a and the second edge 18b fall within the range of the circle O.

[0062] The distance between the first arc edge 15 and the second arc edge 16 is defined as the second distance D1. The length direction L of the cutting head 1322 is defined as the extension direction of the second distance D1. The width direction of the cutting head 1322 is defined as the width direction W. The distance of the cutting head 1322 in the width direction W is defined as the third distance D2. The second distance D1 is greater than the third distance D2. The distance between the first arc edge 15 and the second arc edge 16 refers to the maximum distance between them. The distance of the cutting head 1322 in the width direction W is the maximum distance of the cutting head 1322 in the width direction W. The length of the main body 1321 in the length direction L is less than the second distance D1 of the cutting head 1322.

[0063] The blade head 1322 has a third arc portion 1326 and a fourth arc portion 1327. The third arc portion 1326 connects the first arc portion 1323 and the main body portion 1321. The fourth arc portion 1327 connects the second arc portion and the main body portion 1321. The third arc portion 1326 has a first connecting portion 1326a and a second connecting portion 1326b. The length direction of the main body portion 1321 is defined as the height direction H. The blade head 1322 is defined as low. Along the height direction H, the first connecting portion 1326a is higher than the second connecting portion 1326b. The first connecting portion 1326a is connected to the main body portion 1321, and the second connecting portion 1326b is connected to the first arc portion 1323.

[0064] The third arc portion 1326 and the fourth arc portion 1327 are in the form of smooth arc surfaces. The fourth arc portion 1327 connects the second arc portion 1325 and the main body portion 1321. During the rotation and upward movement, the first arc portion 1323 and the second arc portion 1325 extrude the peripheral wall corresponding to the punch hole, while the third arc portion 1326 and the fourth arc portion 1327 pull the peripheral wall corresponding to the punch hole. Since the processing mold 132 has a small stroke during rotation and upward movement, the simultaneous pulling action through these two parts is more conducive to forming a complete and high flange on the peripheral wall corresponding to the punch hole, and the edge of the flange is more neatly processed.

[0065] Reference Figure 13 , Figure 13 To Figure 12 The diagram shows a bottom view of the machining mold 132. A first arcuate portion 1323 has a first arcuate edge 15 at the bottom of the cutting head, and a second arcuate portion 1325 has a second arcuate edge 16 at the bottom of the cutting head. A second distance D1 is the maximum distance between the first arcuate edge 15 and the second arcuate edge 16. The bottom of the cutting head also includes a first edge 18a and a second edge 18b. In this embodiment, the first edge 18a and the second edge 18b can be straight lines. The first arcuate edge 15 connects one end of the first edge 18a and the second edge 18b, and the second arcuate edge 16 connects the other end of the first edge 18a and the second edge 18b. A third distance D2 is the maximum distance between the first edge and the second edge.

[0066] In this embodiment, since the sum of the lengths of the first arc edge 15 and the second arc edge 16 is much smaller than the circumference of the cutter head 1322, it is advantageous for the processing die 132 to draw the peripheral wall corresponding to the punch hole to form a higher flange.

[0067] As another implementation method, refer to Figure 14 , Figure 14 The bottom view of the machining mold 132 shows a first arcuate portion 1323 with a first arcuate edge 15 at the bottom of the cutting head, and a second arcuate portion 1325 with a second arcuate edge 16 at the bottom of the cutting head. The second distance D1 is the maximum distance between the first arcuate edge 15 and the second arcuate edge 16. The bottom of the cutting head also includes a first edge 18a and a second edge 18b. In this embodiment, the first edge 18a is not a straight line and can be composed of multiple line segments or arcs. The second edge 18b is also not a straight line and can be composed of multiple line segments or arcs. In this embodiment, the first edge includes three line segments, the second edge includes three line segments, the first arcuate edge 15 connects one end of the first edge and the second edge, and the second arcuate edge 16 connects the other end of the first edge and the second edge. The third distance D2 is the maximum distance between the first edge and the second edge.

[0068] In this embodiment, since the lengths of the first arc edge 15 and the second arc edge 16 are much smaller than the circumference of the cutter head 1322, it is advantageous for the processing die 132 to draw the peripheral wall corresponding to the punch hole to form a higher flange.

[0069] As another implementation method, refer to Figure 15 The outer peripheral wall of the cutting head 1322 of the processing mold 132 has a first arc portion 1323 and a second arc portion 1325. The bottom of the cutting head has a first edge and a second edge. The first arc portion 1323 and the second arc portion 1325 are symmetrically arranged, and the first edge and the second edge are irregular shapes.

[0070] It should be understood that the cutting head 1322 of the machining mold 132 can also have various other shapes.

[0071] Pipe fitting processing equipment 10 can be used for hole processing of metal pipe fittings. Specific processing methods include:

[0072] The pipe to be processed is clamped by moving the first clamping jaw fixing mechanism 121 and the second clamping jaw fixing mechanism 122 relative to each other to clamp the pipe to be processed 20; the pipe to be processed 20 can be an aluminum pipe, a copper pipe or other metal pipe.

[0073] The processing mold 132 moves downward to punch holes in the pipe fitting 20 to be processed. The processing mold 132 includes an integrally formed main body 1321 and a cutting head 1322. During punching, the cutting head 1322 enters the pipe fitting 20 to be processed. The outer peripheral wall of the cutting head 1322 has a first arc portion 1323 and an edge portion 1324 integrally connected to the first arc portion 1323. In a cross section perpendicular to the lifting direction of the processing mold, there is a maximum distance between the first arc portion 1323 and the center line of the main body 1321. This maximum distance is defined as the first distance R. A circle O is drawn with the center of the center line of the main body 1321 and the first distance R as the radius. The edge portion 1324 falls within the range of the circle O. The distance between most of the edge portion 1324 and the center line of the main body 1321 is less than the first distance R. The processing mold rotates and rises, forming a flange on the peripheral wall corresponding to the punching hole in the pipe fitting.

[0074] The cutting head 1322 has a third arc portion 1326, which connects the first arc portion 1323 and the main body portion 1321. The third arc portion 1326 has a first connecting portion 1326a and a second connecting portion 1326b. The length direction of the main body portion 1321 is defined as the height direction H, and the cutting head 1322 is defined as the lower part. Along the height direction H, the first connecting portion 1326a is higher than the second connecting portion 1326b. The first connecting portion 1326a is connected to the main body portion 1321, and the second connecting portion 1326b is connected to the first arc portion 1323. The processing mold 132 rotates and rises to form a flange on the punched peripheral wall of the tube to be processed 20.

[0075] The pipe fitting processing method includes a punching process and a drawing process. In the punching process, the processing die 132 moves downward to punch a hole in the pipe fitting to be processed, and the cutting head 1322 enters the punched hole of the pipe fitting to be processed. In the drawing process, the cutting head 1322 rotates and rises inside the punched hole of the pipe fitting to be processed, and the first arc of the cutting head 1322 presses against the peripheral wall corresponding to the punched hole of the pipe fitting to be processed. The radial position of the processing die 132 during punching is the same as the radial position before rotation. Considering that if the processing die is not circular or cylindrical, its radial position is difficult to determine, therefore, for ease of explanation, the following explanation is given in this article: the radial position of the processing die is assumed based on the rotation direction of the processing die. Before rotating upward, the processing die 132 maintains its radial position unchanged, or the radial position of the processing die 132 during punching is the same as the radial position of the processing die 132 when it is inserted into the punch, so that before drawing, the shape of the punch is the same as the shape of the cutting head 1322 of the processing die 132, so that the first arc portion 1323 can squeeze and draw the wall portion corresponding to the punch during the drawing process to form a flange.

[0076] In actual operation, before the first and second clamping mechanisms clamp the pipe to be processed, the pipe to be processed 20 is first placed on the mandrel 124 and the pipe to be processed 20 is fixed by the third clamping mechanism 123.

[0077] When the processing die 132 moves downward to punch a hole in the pipe to be processed, at least a portion of the mandrel 124 is located below the direction of movement of the processing die; at least a portion of the mandrel 124 is also located below the second hole. The processing die 132 moves downward to punch a hole in the pipe to be processed 20, forming a punch in the pipe to be processed 20.

[0078] The processing mold 132 moves upward, and the mandrel 124 moves away from the corresponding lower position of the processing mold 132 along the axial direction of the tube 20 to be processed.

[0079] The processing mold 132 moves downward again and enters the punching cavity of the pipe fitting 20 to be processed;

[0080] The processing mold 132 rotates and rises, forming a flange on the peripheral wall corresponding to the punching hole of the pipe 20 to be processed.

[0081] During the downward movement of the processing die 132 and its upward movement after punching a hole in the pipe fitting 20, the processing die 132 maintains its original radial position. When the processing die 132 moves downward again, it can re-enter the already punched hole. Because the cutting head 1322 of the processing die 132 is not circular, if the processing die 132 moves too much radially during its upward movement, changing its position during punching, it will affect the smooth entry of the processing die 132 into the punched hole of the pipe fitting 20 during its subsequent downward movement. Therefore, the radial position of the processing die 132 remains unchanged during the two downward movements. When the processing die 132 enters the punched hole and rotates upward, it can pull out the non-circular punched peripheral wall, forming a flange.

[0082] In addition, during the rotation of the processing mold 132, the rotation speed of the processing mold 132 is faster than the upward speed of the processing mold 132, which helps to form a complete and consistent flange on the peripheral wall corresponding to the punching.

[0083] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. For example, the directional definitions such as "front", "back", "left", "right", "up", and "down" are used. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still combine, modify or substitute the present invention with each other. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A machining mold, comprising a main body and a cutting head, characterized in that, In a radial direction parallel to the main body, the cutting head at least partially protrudes from the main body. The cutting head has at least a first arcuate portion and a second arcuate portion. The first arcuate portion and the second arcuate portion have a first arcuate edge and a second arcuate edge at the bottom of the cutting head. The bottom of the cutting head has a first edge and a second edge. The first edge connects the first arcuate edge and the second arcuate edge, and the second edge connects the first arcuate edge and the second arcuate edge. The center line of the main body has a projection center point P at the bottom of the cutter head. The maximum distance between the first arc edge and the center point P and the maximum distance between the second arc edge and the center point P are equal. The maximum distance between the center point P and the first arc edge is defined as the first distance R. A circle O is drawn with the center point P as the center and the first distance R as the radius. The first edge and the second edge fall within the range of circle O. The blade head has a third arc portion, the third arc portion has a first connecting portion and a second connecting portion, the first connecting portion is connected to the main body portion, the second connecting portion is connected to the first arc portion, the length direction of the main body portion is defined as the height direction H, and along the height direction H, the first connecting portion is higher than the second connecting portion.

2. The processing mold according to claim 1, characterized in that, The center extension line of the main body is defined to pass through the cutter head. In the radial direction parallel to the main body, the distance between the second connecting part and the center extension line of the main body is greater than the distance between the first connecting part and the center extension line of the main body.

3. The processing mold according to claim 1, characterized in that, The first arc portion and the second arc portion are located on the outer peripheral wall of the cutter head, and extend to the bottom of the cutter head along the length direction of the main body portion; The blade head has a fourth arc portion, and the third and fourth arc portions are in the form of smooth arc surfaces; The fourth arc portion has a third connecting portion and a fourth connecting portion. The third connecting portion is connected to the main body portion, and the fourth connecting portion is connected to the second arc portion. Along the height direction H, the third connecting portion is higher than the fourth connecting portion. The center extension line of the main body portion is defined to pass through the cutter head. In the radial direction parallel to the main body portion, the distance between the fourth connecting portion and the center extension line of the main body portion is greater than the distance between the third connecting portion and the center extension line of the main body portion.

4. The processing mold according to claim 1, characterized in that, The maximum distance between the first arc and the second arc is defined as the second distance D1. The length direction L of the blade head is defined as the extension direction of the second distance D1. The width direction W of the blade head corresponds to the length direction L. The distance of the blade head in the width direction W is defined as the third distance D2. The second distance D1 is greater than the third distance D2.

5. The processing mold according to claim 4, characterized in that, The distance of the main body in the width direction W is defined as the fourth distance D3, and the fourth distance D3 ≤ the third distance D2.

6. The processing mold according to claim 4, characterized in that, The second distance D1 is the maximum distance between the first arc edge and the second arc edge; the bottom of the cutter head is elliptical, and the second distance D1 is defined as the major axis of the ellipse, and the third distance D2 is the minor axis of the ellipse; the length of the main body in the minor axis direction at the bottom of the cutter head is the same as the third distance D2.

7. The processing mold according to claim 4, characterized in that, The second distance D1 is the maximum distance between the first arc edge and the second arc edge; the first arc edge connects one end of the first edge and the second edge, and the second arc edge connects the other end of the first edge and the second edge; the third distance D2 is the maximum distance between the first edge and the second edge.

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