A spinning tool

Abstract

A spinning tool, including an upper connecting plate for connecting with the upper connecting seat of the spinning machine, a lower connecting plate for connecting with the lower connecting seat of the spinning machine, and a spinning wheel; the upper connecting plate is connected to the upper core mold; the lower core mold is connected to the lower connecting plate; the ejector is installed at the outer molding surface of the lower core mold; the ejector plate 1 and the ejector plate 2 are arranged in a cross shape, connected at the middle intersection, and connected to the connecting block at the lower end; both ends of the ejector plate 1 and the ejector plate 2 are connected with ejector rods; a clearance hole is provided in the middle of the lower connecting plate so that the ejector plate 1 and the ejector plate 2 can be raised and lowered in the clearance hole along with the ejection mechanism of the spinning machine; the lower core mold is provided with a through hole for the upper end of the ejector rod to pass through so as to push the ejector to feed upward when withdrawing the material. The upper and lower core mold working surfaces are provided with an inclination to facilitate the picking and placing of processed products; the ejector facilitates the rapid switching of different products; the utility model is arranged on the spinning machine for forming a water jacket casing blank, and no waste is produced during the forming process, thereby improving the material utilization rate.

Description

Technical Field

[0001] The utility model relates to a spinning tool. Background Art

[0002] The water jacket casing blank is machined in the post-process to become the finished water jacket casing, which is a component of the automobile motor. The water jacket casing is a cylindrical part with a small diameter at the upper end, a large diameter at the lower end, and a wall thickness of 5mm-10mm. When in use, the water jacket casing is installed inside the motor, and the stator core assembly is in the water jacket casing. The two end surfaces of the water jacket casing are respectively connected and fixed to the front cover and the rear cover. The coolant is passed into the water jacket casing through the cooling system to cool the motor. The water jacket casing is used to pass the coolant to cool down the motor so as to ensure that the temperature of the motor is not too high, thereby protecting the safety of the entire motor, extending the service life of the motor, and reducing the burning failure of the motor caused by overheating.

[0003] In the production and processing of water jacket casing, the traditional process is usually to cast a cylindrical water jacket casing blank, then machine all the surface contours, and then process the mounting holes through the machining center to make the finished product. First of all, casting itself is an industry with high energy consumption and high pollution, which is contrary to the environmental protection concept advocated by the country in recent years. Secondly, the material utilization rate of the casting blank is usually very low in the product, usually below 30%, and when machining the surface contour, due to the large casting allowance, a large amount of waste needs to be turned, resulting in a large amount of wear on the turning tool, and the processing cycle is too slow, which is not conducive to assembly line production. Finally, the casting raw materials themselves have defects such as pores, shrinkage, and micro cracks, which greatly reduce the service life of the product, resulting in frequent replacement in the after-sales market, which is a great waste of manpower, material resources, and financial resources. Summary of the invention

[0004] The utility model aims to provide a spinning tool, which is arranged on a spinning machine and is used for forming a water jacket casing blank.

[0005] The technical scheme of the utility model is as follows: a spinning tool is arranged on a spinning machine for forming a water jacket casing blank; the spinning tool comprises an upper connecting plate connected to an upper connecting seat of the spinning machine, an upper core mold, a lower core mold, an ejector, an ejector rod, a lower connecting plate connected to a lower connecting seat of the spinning machine, an ejector plate 1, an ejector plate 2, a connecting block, and a spinning wheel; the upper connecting plate is connected to the upper core mold; the lower core mold is connected to the lower connecting plate; the ejector is installed on the outer side of the lower core mold to form a molding surface The ejector plates 1 and 2 are arranged crosswise, connected at the middle intersection, and connected to the connection block at the lower end; both ends of the ejector plates 1 and 2 are connected with ejector rods; the middle of the lower connecting plate is hollowed out in four cross-shaped positions to form clearance holes so that the ejector plates 1 and 2 can be raised and lowered in the clearance holes along with the ejection mechanism of the spinning machine to complete the material withdrawal; the lower core mold is provided with a through hole for the upper end of the ejector rod to pass through to push the ejector to feed upward during material withdrawal. The inner hole of the upper connecting seat and the upper end stop of the upper connecting plate have a clearance fit to ensure that the center of the upper connecting plate and the upper connecting seat coincide, and the clearance between the two is between 0.01mm-0.05mm. The lower end stop of the upper connecting plate and the upper end stop of the upper core mold have a clearance fit to ensure that the center of the upper connecting plate and the upper core mold coincide, and the clearance between the two is between 0.01mm-0.05mm. The upper stop of the lower connecting seat and the lower stop of the lower connecting plate have clearances that match, ensuring that the centers of the lower connecting plate and the lower connecting seat coincide with each other, and the clearance between the two is between 0.01mm and 0.05mm. The upper stop of the lower connecting plate and the lower stop of the lower core mold have clearances that match, ensuring that the centers of the lower connecting plate and the lower core mold coincide with each other, and the clearance between the two is between 0.01mm and 0.05mm. The ejector and the lower core mold have clearances that match, and the clearance between them is between 0.01mm and 0.05mm. The included angle between the ejector plate 1 and the ejector plate 2 is 90°±0.25°. The rotary wheel is mounted on the rotary wheel seat of the spinning machine. Driven by the hydraulic service system of the side cylinder of the spinning machine, the rotary wheel can realize radial feeding and retraction, vertical feeding and retraction, and complete the entire spinning process. The rotary wheel profile is composed of an upper blade back, a forming arc, a forming surface, a material limiting arc, a material limiting profile, a transition arc, and a lower blade back, wherein the angle between the upper blade back and the horizontal plane is 40°±0.1°, the radius of the forming arc is 2.5±0.1mm, the angle between the forming surface and the horizontal plane is 45°±0.05°, the radius of the material limiting arc is 1±0.1mm, the angle between the material limiting profile and the horizontal plane is 45°±0.1°, the radius of the transition arc is 4±0.1mm, and the angle between the lower blade back and the horizontal plane is 40°±0.1°. The working surface of the lower core mold has an inclination, the starting point of the inclination is at the half position of the working surface, the inclination is 0.25°±0.05°, and a smooth transition is made with an arc at the connection between the inclination and the upper end surface. The working surface of the upper core mold has an inclination, the starting point of the inclination is at the half of the working surface, the inclination is 3°±0.25°, and a circular arc is used for smooth transition at the connection between the inclination and the lower end surface.

[0006] Compared with the prior art, the spinning tool provided by the utility model is arranged on the spinning machine for forming the water jacket casing blank, and has the following advantages: 1: it is convenient for the forming of raw materials; 2: no waste is produced during the forming process of the water jacket casing blank, and the material utilization rate is increased by more than 50%; 3: the setting of the inclination on the upper and lower core mold working surfaces is convenient for the picking and placing of processed products; 4: the modular design of the ejector is convenient for the rapid switching of different products; 5. Compared with casting machine, spinning molding has low energy consumption, zero pollution, and fast processing rhythm, and the processing rhythm can be accelerated by more than 90%. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of preparing seamless steel pipe;

[0008] Figure 2 This is a schematic diagram of a seamless steel pipe for transition after the pre-turning port;

[0009] Figure 3 This is a schematic diagram of the raw material after spinning after turning the inner diameter;

[0010] Figure 4 It is a structural schematic diagram of a water jacket casing blank product;

[0011] Figure 5 It is a schematic diagram of the spinning tooling;

[0012] Figure 6 This is an enlarged view of the upper part of the spinning tooling;

[0013] Figure 7 This is an enlarged view of the lower half of the spinning tooling;

[0014] Figure 8 This is an enlarged view of the spinning wheel part of the spinning tooling;

[0015] Fig. 9 It is a schematic diagram of the spinning structure;

[0016] Fig.10 It is a schematic diagram of the rotary wheel profile;

[0017] Fig.11 1. It is a top view schematic diagram of the assembly of the lower connecting plate, the first ejector plate and the second ejector plate;

[0018] Fig.12 1. It is a schematic diagram of the structure of the lower core mold;

[0019] Fig.13 It is a schematic diagram of the structure of the upper core mold.

[0020] In the figure, 1. Prepared seamless steel pipe; 2. Seamless steel pipe for transition; 3. Raw material for spinning; 4. Water jacket housing blank; 11. Upper connecting seat of the spinning machine; 12. Upper connecting plate; 121. Upper end stopper of the upper connecting plate; 122. Lower end stopper of the upper connecting plate; 13. Upper core mold; 131. Upper end stopper of the upper core mold; 14. Lower core mold; 141. Lower end stopper of the lower core mold; 15. Ejector; 15 1. Positioning groove; 16. Ejector rod; 161. Threaded head; 17. Lower connecting plate; 171. Stopper at the lower end of the lower connecting plate; 172. Stopper at the upper end of the lower connecting plate; 173. Clearance hole; 18. Ejector plate 1; 19. Ejector plate 2; 20. Connecting block; 21. Lower connecting seat of the spinning machine; 211. Stopper at the upper end of the lower connecting seat; 22. Ejector mechanism; 23. Rotary wheel; 24. Rotary wheel seat. DETAILED DESCRIPTION

[0021] The spinning tool provided by the utility model includes an upper connecting plate 12, an upper core mold 13, a lower core mold 14, an ejector 15, a ejector rod 16, a lower connecting plate 17, an ejector plate 1 18, an ejector plate 2 19, a connecting block 20, and a spinning wheel 23. Figure 5-Figure 8 shown.

[0022] The connecting plate 12 on the spinning tool is fixed together with the upper connecting seat 11 of the spinning machine by bolts. The inner hole of the upper connecting seat 11 and the upper end stop 121 of the upper connecting plate are matched with each other to ensure that the center of the upper connecting plate 12 coincides with the center of the upper connecting seat. The matching clearance between the two is between 0.01mm-0.05mm.

[0023] The upper connecting plate 12 of the spinning tool is connected to the upper core mold 13, and the clearance between the lower end stop 122 of the upper connecting plate and the upper end stop 131 of the upper core mold is used to ensure that the centers of the upper connecting plate 12 and the upper core mold 13 coincide with each other, and the clearance between the two is between 0.01mm and 0.05mm.

[0024] The lower connecting plate 17 of the spinning tool is fixed together with the lower connecting seat 21 of the spinning machine by bolts. The clearance between the upper end stop 211 of the lower connecting seat 21 and the lower end stop 171 of the lower connecting plate 17 is matched to ensure that the center of the lower connecting plate 17 coincides with the lower connecting seat. The clearance between the two is between 0.01mm-0.05mm.

[0025] The lower connecting plate 17 of the spinning tool is fixed together with the lower core mold 14 by bolts, and the lower connecting plate 17 and the lower core mold 14 are ensured to coincide in center through the clearance between the upper stop 172 of the lower connecting plate and the lower stop 141 of the lower core mold, and the clearance between the two is between 0.01mm-0.05mm.

[0026] The ejector plates 18 and 19 of the spinning tooling are arranged in a cross shape with an angle of 90°±0.25°. The middle intersection is connected by bolts, and the two are connected to the connecting block 20 at the lower end. Both ends of the ejector plates 18 and 19 are provided with threaded holes, and the lower end of the ejector rod 16 is provided with a threaded head 161. The threaded head 161 is tightened and assembled with the threaded holes provided at both ends of the ejector plates 18 and 19. The middle part of the lower connecting plate 17 is hollowed out at four cross-shaped positions to form clearance holes 173, so that the ejector plates 18 and 19 can move up and down in the clearance holes with the ejection mechanism 22 of the spinning machine, thereby completing the material return.

[0027] The ejector 15 of the spinning tooling is installed on the outside of the lower core mold 14, and the clearance between the two is matched, and the matching clearance is between 0.01mm-0.05mm. After the spinning process is completed, the ejector mechanism 22 of the spinning machine feeds upward, drives the connecting block 20 to feed upward, drives the ejector plate 1 18 and the ejector plate 2 19 to feed upward, drives the ejector rod 16 to feed upward, thereby driving the ejector 15 to feed upward, and the processed water jacket casing blank 4 is completed.

[0028] The rotating wheel 23 is mounted on the rotating wheel seat 24. Driven by the hydraulic service system of the side cylinder of the spinning machine, the rotating wheel can realize radial feeding and retraction, and can also realize vertical feeding and retraction to complete the entire spinning process.

[0029] Fig. 9 , Fig.10 In the figure, the rotary wheel 23 is formed by a curve rotation consisting of an upper blade back 231, a forming arc 232, a forming surface 233, a material limiting arc 234, a material limiting profile 235, a transition arc 236, and a lower blade back 237 connected in sequence, wherein the angle between the upper blade back 231 and the horizontal plane is 40°±0.1°, the forming arc 232 is R2.5±0.1, the angle between the forming surface 233 and the horizontal plane is 45°±0.05°, the material limiting arc 234 is R1±0.1, the angle between the material limiting profile 235 and the horizontal plane is 45°±0.1°, the transition arc 236 is R4±0.1, the angle between the lower blade back 237 and the horizontal plane is 40°±0.1°, and the roughness of the entire profile is Ra0.8.

[0030] Fig.12 In the figure, the working surface of the lower core mold 14 of the spinning tooling has a slope, and the starting point of the slope is at the half of the working surface. The slope is 0.25°±0.05°, and a smooth transition is made with an arc of R1±0.25 (radius 1±0.25mm) at the connection between the slope and the upper end surface. The role of the slope is to facilitate the easy removal of the processed water jacket casing blank 4 and the removal of the water jacket casing blank 4. Fig.13In the process, the working surface of the upper core mold 13 of the spinning tool has an inclination, and the starting point of the inclination is at the half position of the working surface. The inclination is 3°±0.25°. The arc of R1±0.25 (radius 1±0.25mm) is used for smooth transition at the connection between the inclination and the lower end surface. The role of the inclination is to play a guiding role during mold closing to avoid interference between the upper core mold 13 and the spinning raw material 3, and to facilitate the return after the spinning machine is completed. The upper core mold 13 is easily separated from the processed water jacket housing blank 4 to avoid the two sticking together. Use a spinning machine to spin the spinning raw material into a water jacket housing blank. The main cylinder pressure required by the spinning machine is 13MPa, the side cylinder pressure is 13MPa, the main cylinder fast feed speed is 40mm / s-50mm / s, the working feed speed is 5mm / s-10mm / s, the spinning wheel 23 fast feed speed is 40mm / s-50mm / s, and the working feed speed is 2mm / s-2.5mm / s.

[0031] First, place the connecting block 20 on the ejection mechanism 22, then put the ejection plate 1 18 and the ejection plate 2 19 into the clearance hole of the lower connecting plate 17, and fix the connecting block 20, the ejection plate 1 18 and the ejection plate 2 19 together with bolts, and then tighten and fix the threaded heads 161 of the four ejection rods 16 on the ejection plate 18 and the ejection plate 2 19 respectively, and then fix the lower connecting plate 17 on the lower connecting seat 21 of the spinning machine with bolts, and then fix the lower core mold 14 on the lower connecting plate 17 with bolts, at this time, the four holes on the lower core mold 14 are aligned with the four ejection rods 16, and then the ejector 15 is placed on the molding surface of the lower core mold 14, and the entire lower half is installed;

[0032] Then install the upper part, first fix the upper connecting plate 12 to the upper connecting seat 11 of the spinning machine with bolts, and then fix the upper core mold 13 to the upper connecting plate 12 with bolts, and then the entire upper part is also installed;

[0033] Start the spinning machine, reset the rotary wheel 23 back to the origin of the coordinates, reset the upper part upward and return it to the origin of the coordinates, put the spinning raw material 3 into the outside of the lower core mold 14, put the lower port of the spinning raw material 3 into the positioning groove 151 of the ejector 15 for initial positioning, start the processing button, and the main cylinder hydraulic service system of the spinning machine drives the entire upper part to feed downward until the upper part and the lower part are molded together. Then the spinning machine starts to rotate, and at the same time, the side cylinder hydraulic service system of the spinning machine drives the rotary wheel seat 2 4 and the rotary wheel 23 feed the spinning raw material 3 quickly. When it is about to touch the processed part, the side cylinder hydraulic private service system starts to convert into slow feed, and squeezes the material of the outer wall of the spinning raw material 3 downward until the entire spinning process is completed. After the rotary wheel 23 is fed downward into place, the water jacket casing blank can be obtained. After the spinning tool rotary wheel 23 is fed to the position of the thickness of the water jacket casing port, the distance between the lower end face of the rotary wheel 23 and the upper end face of the ejector 15 is 1mm±0.2mm. At this time, the rotating wheel 23 and the rotating wheel seat are driven by the side cylinder hydraulic service system to quickly retreat to the coordinate origin. At the same time, the entire upper part is also driven by the main cylinder hydraulic service system to quickly retreat to the coordinate origin. Then the ejector mechanism 22 of the spinning machine starts to feed upward, driving the connecting block 20, the ejector plate 1 18, the ejector plate 2 19, the ejector rod 16, and the ejector 15 to feed upward together. The water jacket casing blank completed by spinning is ejected by the ejector 15, and the water jacket casing blank is taken out, and the whole processing process is completed.

[0034] The utility model is used to produce a water jacket casing blank, comprising the following steps:

[0035] A. Cutting: Use a horizontal sawing machine to saw the seamless steel pipe of Q345B material into several prepared seamless steel pipes with length L, outer diameter D, and inner diameter d (such as Figure 1 As shown); L = L1 + 1.5 mm, where the length of the water jacket housing blank 4 is known to be L1; the inner diameter of the prepared seamless steel pipe 1 is d = d1-1 mm, where the inner diameter of the water jacket housing blank 4 is known to be d1; the outer diameter calculation formula of the prepared seamless steel pipe 1 is:

[0036] ;

[0037] Among them, the volume of the water jacket housing blank 4 is known to be V1, π is the pi, and d2 is the outer diameter of the upper port of the water jacket housing blank 4; B. Pre-turning the upper port: Use a CNC lathe to turn the outer circle of the upper port of the prepared seamless steel pipe 1 that does not participate in the shoveling to the outer diameter d2 of the upper port of the water jacket housing blank 4, and the turning length L2=60%L, L is the length of the prepared seamless steel pipe 1, and obtain the transition seamless steel pipe 2 (such as Figure 2 C. Turning inner diameter: Use a CNC lathe to turn the inner diameter of the transition seamless steel pipe 2 to the inner diameter d1 of the water jacket housing blank 4 to obtain the spinning raw material 3 (as shown in FIG. Figure 3As shown); D. Spinning: The spun raw material 3 processed in the above sequence is spun on a spinning machine into a product water jacket casing blank 4; during spinning, the lower port of the spun raw material 3 is placed in the positioning groove 151 of the ejector 15 for initial positioning, and the spun raw material 3 is plastically deformed in the direction of the lower port under the vertical feeding of the spinning wheel 23. When the spinning wheel 23 is vertically fed downward to the position of the thickness of the water jacket casing port, the product water jacket casing blank 4 (as shown) is obtained. Figure 4 shown);

[0038] E. Material withdrawal: The spinning machine returns upward to withdraw the material.

[0039] Before and after spinning, the material thickness deformation is 30%-35% (that is, the wall thickness of the spinning raw material 3 is thinned by 30-35%). If the deformation is too small, the material will be unstable during spinning, the material will be cut off and cannot be formed. If the deformation is too large, it will cause waste of raw materials and reduce material utilization. After a large number of simulation calculations, the above relatively balanced material thickness deformation range is obtained.

[0040] The utility model is used for producing water jacket casing blanks, can realize that no iron cutting impurities are generated in the spinning process, thus improving the material utilization rate and having an extremely fast production rhythm, providing a technical solution for the production line connection production, using seamless steel pipes as raw materials, and eliminating the casting process with high energy consumption, heavy pollution, low material utilization rate and extremely slow production rhythm under the premise of ensuring the strength of the product, providing a solution for lightweighting and reducing the cost of processing water jacket casing blanks, and improving the competitiveness of the product.

Claims

1. A spinning tool, characterized in that: The spinning tool comprises an upper connecting plate (12) connected to an upper connecting seat (11) of the spinning machine, an upper core mold (13), a lower core mold (14), an ejector (15), an ejector rod (16), a lower connecting plate (17) connected to a lower connecting seat (21) of the spinning machine, an ejector plate 1 (18), an ejector plate 2 (19), a connecting block (20), and a spinning wheel (23); the upper connecting plate (12) is connected to the upper core mold (13); the lower core mold (14) is connected to the lower connecting plate (17); the ejector (15) is mounted on the lower core mold (1 4) at the outer forming surface; the ejector plate 1 (18) and the ejector plate 2 (19) are arranged in a cross shape, connected at the middle intersection, and connected to the connecting block (20) at the lower end; both ends of the ejector plate 1 (18) and the ejector plate 2 (19) are connected to ejector rods (16); a clearance hole (173) is provided in the middle of the lower connecting plate (17) so that the ejector plate 1 (18) and the ejector plate 2 (19) can be raised and lowered in the clearance hole along with the ejection mechanism (22) of the spinning machine; the lower core mold (14) is provided with a through hole for the upper end of the ejector rod to pass through so as to push the ejector (15) to feed upward when the material is withdrawn.

2. The spinning tool according to claim 1, characterized in that: The inner hole of the upper connecting seat (11) and the stopper (121) at the upper end of the upper connecting plate are clearance-matched to ensure that the center of the upper connecting plate (12) coincides with the center of the upper connecting seat, and the clearance between the two is between 0.01 mm and 0.05 mm.

3. The spinning tool according to claim 1, characterized in that: The stopper (122) at the lower end of the upper connecting plate and the stopper (131) at the upper end of the upper core mold are clearance-matched to ensure that the centers of the upper connecting plate (12) and the upper core mold (13) coincide with each other, and the clearance between the two is between 0.01 mm and 0.05 mm.

4. The spinning tool according to claim 1, characterized in that: The stopper (211) at the upper end of the lower connection seat and the stopper (171) at the lower end of the lower connection plate are clearance-matched to ensure that the center of the lower connection plate (17) coincides with the center of the lower connection seat, and the clearance between the two is between 0.01 mm and 0.05 mm.

5. The spinning tool according to claim 1, characterized in that: The stopper (172) at the upper end of the lower connecting plate and the stopper (141) at the lower end of the lower core mold are clearance-matched to ensure that the centers of the lower connecting plate (17) and the lower core mold (14) coincide with each other, and the clearance between the two is between 0.01 mm and 0.05 mm.

6. The spinning tool according to claim 1, characterized in that: The ejector (15) and the lower core mold (14) are clearance-matched, and the clearance is between 0.01 mm and 0.05 mm.

7. The spinning tool according to claim 1, characterized in that: The included angle between the first ejector plate (18) and the second ejector plate (19) is 90°±0.25°.

8. The spinning tool according to claim 1, characterized in that: The profile of the rotary wheel (23) is composed of an upper blade back (231), a forming arc (232), a forming surface (233), a material limiting arc (234), a material limiting profile (235), a transition arc (236), and a lower blade back (237), wherein the angle between the upper blade back (231) and a horizontal plane is 40°±0.1°, the radius of the forming arc (232) is 2.5±0.1 mm, the angle between the forming surface (233) and the horizontal plane is 45°±0.05°, the radius of the material limiting arc (234) is 1±0.1 mm, the angle between the material limiting profile (235) and the horizontal plane is 45°±0.1°, the radius of the transition arc (236) is 4±0.1 mm, and the angle between the lower blade back (237) and the horizontal plane is 40°±0.1°.

9. The spinning tool according to claim 1, characterized in that: The working surface of the lower core mold (14) has an inclination, the starting point of the inclination is at the halfway point of the working surface, the inclination is 0.25°±0.05°, and a circular arc is used for smooth transition at the connection between the inclination and the upper end surface.

10. The spinning tool according to claim 1, characterized in that: The working surface of the upper core mold (13) has an inclination, the starting point of the inclination is at the halfway point of the working surface, the inclination is 3°±0.25°, and a circular arc is used for smooth transition at the connection between the inclination and the lower end surface.

Images