A production process for a solenoid valve body

Abstract

The present invention discloses a production process for a solenoid valve body, comprising the following steps: S1: bar cutting - cutting a long bar according to the required size of the bar; S2: surface cleaning - surface grinding and rust removal of the cut bar by a milling machine; S3: electric furnace heating - heating the bar in stages by two groups of heating coils connected to the electric furnace, wherein a feeding device is used to add multiple bars into the heating coils one by one; S4: upsetting pretreatment - upsetting the bar with an air hammer with a falling part mass of 750 kg to change the shape of the round bar; S5: die forging forming - forming the bar by using a die; S6: machine tool processing - cutting and drilling the formed valve body by using a numerical control machine tool.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valve body manufacturing, and particularly relates to a production process of a solenoid valve body. Background Art

[0002] A solenoid valve is an industrial device controlled by electricity. It is a basic automation component for controlling fluids, belonging to an actuator, and is not limited to hydraulic and pneumatic applications. It is used in industrial control systems to adjust parameters such as the direction, flow rate, speed, and others of the medium. Solenoid valves can cooperate with different circuits to achieve the expected control, and both the control accuracy and flexibility can be guaranteed. There are many types of solenoid valves, and different solenoid valves play roles in different positions of the control system. The most commonly used ones are check valves, safety valves, direction control valves, speed regulating valves, etc.; among them, a solenoid valve mainly consists of a valve body, a valve cover, and fittings.

[0003] Currently, a Chinese patent with the publication number CN110538951 and the publication date of March 16, 2021, discloses a valve body forging process, which includes the following steps:

[0004] S1, band saw blanking: First, check and confirm the quantity and external dimensions of the round bar stock for processing. Use a horizontal band saw for blanking. The maximum cross-sectional width and height range of the horizontal band saw is 400*350mm. Then, adjust the material support frame to the same height as the workbench to improve the accuracy of the blanking size;

[0005] S2, surface cleaning: First, use a milling machine to grind and remove rust on the surface of the above-mentioned cut round bar stock for the first surface treatment to remove the rust on its surface. Then, pickle the round bar stock for the second surface treatment to remove the remaining oxide scale on its surface;

[0006] S3, electric furnace heating: Use a box-type electric furnace with a rated temperature of 1300°C to heat the round bar stock in stages. The specific steps are as follows: First, preheat in a medium-temperature electric furnace until it reaches 860°C - 930°C, then keep it warm for 55 - 65 minutes. Then, heat it in a high-temperature electric furnace to 1170°C - 1190°C, and finally keep it warm for 18 - 22 minutes;

[0007] S4, upsetting pretreatment: Use an air hammer with a falling part mass of 750 kg to upset the above-mentioned round bar stock to change its shape;

[0008] S5, final forging and forming: Adopt a die forging method. The die is preheated according to regulations. The die preheating temperature is 200°C - 400°C. Before forging, clean the die cavity and evenly spray lubricant in time;

[0009] S6, inspection and trimming: Perform trimming and finishing on the formed valve body.

[0010] During the process of the electric furnace heating the round bar stock in stages, two groups of heating coils are connected outside the electric furnace, and the two groups of heating coils are butted together. After passing through the two groups of heating coils, each round bar stock can be heated to the required temperature. When multiple round bar stocks are fed, operators often need to add them into the heating coils one by one. At this time, the process of feeding the round bar stocks is time-consuming and laborious, and the operators are also prone to being scalded when approaching the high-temperature heating coils. Summary of the Invention

[0011] The purpose of the present invention is to provide a production process for a solenoid valve body, which is beneficial to facilitating the feeding of multiple bar stocks one by one during the heating stage of the electric furnace.

[0012] The above technical purpose of the present invention is achieved through the following technical solutions:

[0013] A production process for a solenoid valve body includes the following steps:

[0014] S1: Bar stock cutting - cutting the long bar stock according to the required size of the bar stock;

[0015] S2: Surface cleaning - surface grinding and rust removal of the cut bar stock by a milling machine;

[0016] S3: Electric furnace heating - heating the bar stock in stages by two groups of heating coils connected to the electric furnace, wherein a feeding device is used to add multiple bar stocks into the heating coils one by one. This feeding device includes a support plate arranged on the outer wall of the electric furnace and supporting the lower side of the heating coils, a guide tube arranged on the support plate and passing through the two groups of heating coils, a blanking plate arranged at one end of the support plate for the bar stock heated in the guide tube to fall, a bin arranged at the end of the support plate far from the blanking plate for stacking multiple bar stocks with heating rods up and down, a blanking plate arranged under the bin for the bar stock to roll down, and a pushing component arranged on the support plate for pushing the multiple bar stocks rolling down in the blanking plate into the guide tube one by one;

[0017] S4: Upsetting pretreatment - upsetting the bar stock with an air hammer with a falling part mass of 750 kg to change the shape of the round bar stock;

[0018] S5: Die forging forming - forming the bar stock with a die;

[0019] S6: Machine tool processing - cutting and drilling the formed valve body with a numerically controlled machine tool.

[0020] By adopting the above technical solutions, after bar stock cutting - surface cleaning - electric furnace heating - upsetting pretreatment - die forging forming - machine tool processing, the solenoid valve body can be obtained;

[0021] During the electric furnace heating process, two sets of electric heating coils are required to heat the bar stock in stages. At this time, multiple bar stocks are stacked vertically in the bin, and the bar stocks can roll down along the blanking plate in the bin. Subsequently, the pushing component can be used to push the rolled bar stocks into the guide tube one by one. After the bar stock moves into the guide tube, it can be located inside the heating coil. When the heating coil is full, the pushing of the pushing component can be stopped. After the bar stock is heated for the rated time, the pushing component is used to push the feed again. Subsequently, the newly entered bar stock in the guide tube can push the bar stock that has been heated out of the guide tube from the other end of the guide tube. At this time, the heated bar stock can fall along the blanking plate and then proceed to the next process; compared with adding bar stocks one by one manually in the prior art, it can save a lot of labor, and the operator does not need to approach the high-temperature heating coil, so the situation of being scalded will not occur.

[0022] The further setting of the present invention is: the blanking plate is in a "U" shape and the cross-sectional width is equal to the length of the bar stock. The blanking plate is inclined downward and the extending direction is perpendicular to the extending direction of the guide tube. The pushing component includes a connecting table connected to the end of the support plate away from the blanking plate, a first column arranged on the connecting table and close to the lower end side of the blanking plate, a swinging material taking table with a V-shaped cross-section and hinged to the upper end of the first column at the lower side, a semi-circular extension tube arranged at the end of the guide tube for the end of the swinging material taking table to swing and abut against, a baffle plate arranged at one end of the swinging material taking table and on the side away from the blanking plate, a connecting arm arranged above the baffle plate, a blocking rod arranged at the upper end of the connecting arm and extending vertically downward for blocking the second-to-last bar stock at the lowermost end of the blanking plate, and a driving member arranged on the connecting table for driving the swinging material taking table to swing back and forth to send the bar stock into the semi-circular extension tube; when the end of the swinging material taking table abuts inside the semi-circular extension tube, the side of the swinging material taking table away from the semi-circular extension tube blocks the lowermost bar stock at the lowermost end of the blanking plate, and at the same time, the lower end of the blocking rod is located above the position between the second-to-last bar stock and the lowermost bar stock.

[0023] By adopting the above technical solution, the driving member drives the end of the swinging material taking table close to the blanking plate to swing downward. At this time, the blocking rod moves downward to block the second-to-last bar stock, and the lowermost bar stock falls into the swinging material taking table during the downward swing of the swinging material taking table, thus completing the process of taking a bar stock on the swinging material taking table.

[0024] Subsequently, the swinging material taking table swings in the reverse direction, so that the end of the swinging material taking table away from the blanking plate swings downward and abuts inside the semi-circular extension tube. At this time, the bar stock in the swinging material taking table slides down along the inclined swinging material taking table and then enters the semi-circular extension tube.

[0025] When feeding without using the swinging material taking table, the driving member is used to keep the end of the swinging material taking table in contact with the inner part of the semi-circular extension pipe. At this time, the side of the swinging material taking table away from the semi-circular extension pipe blocks the last but one bar at the lowermost end of the blanking plate, and at the same time, the lower end of the blocking rod is located above the position between the second last bar and the last but one bar.

[0026] A further setting of the present invention is that: the driving member includes a guide plate arranged on the side of the swinging material taking table away from the blanking plate, a connecting spring with its upper end connected to the end of the guide plate away from the blanking plate and its lower end connected to the connecting table, a second upright column arranged on the connecting table, a servo motor arranged at the upper end of the second upright column, a driving shaft arranged on the output shaft of the servo motor, a first push rod with one end connected to the driving shaft and the other end for abutting against the guide plate, a second push rod with one end connected to the driving shaft and used for pushing the bar into the semi-circular extension pipe, a first strip-shaped hole opened on the lower side of the swinging material taking table for the second push rod to pass through, and a second strip-shaped hole opened on the lower side of the semi-circular extension pipe for the second push rod to pass through.

[0027] By adopting the above technical solution, after the servo motor drives the driving shaft to rotate, since one end of the first push rod on the driving shaft is connected to the driving shaft and the other end abuts against the guide plate, and at the same time, the upper end of the connecting spring is connected to the end of the guide plate away from the blanking plate and the lower end is connected to the connecting table, the swinging material taking table can be driven to swing back and forth through the cooperation of the first push rod and the connecting spring;

[0028] When the end of the swinging material taking table abuts against the inner part of the semi-circular extension pipe and the bar slides to the end of the semi-circular extension pipe, due to the blocking effect of the bar originally existing on the semi-circular extension pipe, the bar sliding on the swinging material taking table is often located between the swinging material taking table and the semi-circular extension pipe. At this time, the servo motor is used to continue driving the driving shaft to rotate, the first push rod continues to rotate downward around the driving shaft, and the second push rod can rotate upward. By using the first strip-shaped hole opened on the lower side of the swinging material taking table and the second strip-shaped hole opened on the lower side of the semi-circular extension pipe, after the second push rod rotates upward, it can enter the first strip-shaped hole and the second strip-shaped hole, and then the second push rod can push the bar on the swinging material taking table into the semi-circular extension pipe, and the bar originally existing in the semi-circular extension pipe can be pushed towards the guide pipe;

[0029] As the servo motor continues to drive the driving shaft to rotate, after the second push rod completes the action of pushing the bar, it can rotate downward, and at this time, the first push rod can rotate upward, so as to drive the swinging material taking table to swing again through the first push rod to complete the material taking action; finally, the feeding of the bars in the guide pipe one by one can be completed.

[0030] A further setting of the present invention is that: the second push rod includes a straight rod with one end connected to the driving shaft and an arc-shaped rod with one end connected to the end of the straight rod away from the driving shaft and used for abutting against the end face of the bar, and the straight rod is parallel to the first push rod.

[0031] By adopting the above technical solution, the arc-shaped rod on the second push rod can be used to facilitate smooth and stable pushing of the bar material.

[0032] The present invention is further configured as follows: a guide wheel is rotatably connected to one end of the first push rod away from the driving shaft.

[0033] By adopting the above technical solution, the first push rod is conducive to the guide wheel to contact with the guide plate, thereby facilitating the swinging material picking table to swing smoothly and stably through the guide wheel.

[0034] The present invention is further configured as follows: the length of the guide tube is equal to the sum of the lengths of the two groups of heating coils, and the length of the two groups of guide tubes is equal to the sum of the lengths of ten rods.

[0035] By adopting the above technical solution, the ten rods in the heating coil can be completely immersed in the package of the heating coil, which can facilitate heating the entire rod in the heating coil and avoid half of the rod being in the heating coil and the other half being outside the heating coil, which can ultimately facilitate stable and balanced heating of multiple rods.

[0036] The present invention is further configured as follows: a support platform connected to the lower side of the semicircular extension tube is provided on the support plate, a swinging docking sleeve is provided between the semicircular extension tube and the guide tube, the swinging docking sleeve is in contact with the support platform and a rod is embedded therein, and a swinging part is provided on the support plate for driving the swinging docking sleeve to swing and then drive the rod therein away from the heating coil.

[0037] By adopting the above technical solution, since the bar material near the end of the heating coil does not enter the heating coil, but is also subjected to greater heat because it is close to the heating coil, the bar material near the end of the heating coil will be rapidly heated after entering the heating coil, thereby causing the bar material to be overheated, which will eventually be detrimental to the precise heating of the bar material and affect the subsequent upsetting of the bar material.

[0038] At this time, the swinging part is used to drive the swinging docking sleeve to swing toward the side away from the heating coil, thereby driving the rods in the swinging docking sleeve away from the heating coil; until the previous batch of rods in the heating coil has completed heating, it is necessary to use the swinging part to drive the swinging docking sleeve to swing in the opposite direction, so that the swinging docking sleeve can dock with the guide tube and the semicircular extension tube, and the rods in the semicircular extension tube can push the rods in the swinging docking sleeve into the guide tube, thereby completing the feeding of the next batch of rods.

[0039] A further setting of the present invention is that: the swinging member includes a swinging shaft rotatably connected to the support plate and located on one side of the support table, a swinging motor arranged on the support plate and whose output shaft is connected to the swinging shaft, two connecting rods arranged on the swinging shaft and connected to the swinging docking sleeve, and a limiting member for limiting the bar stock in the swinging docking sleeve is further arranged between the two connecting rods on both sides.

[0040] By adopting the above technical solution, the swinging motor drives the swinging shaft to rotate, and the connecting rod on the swinging shaft can drive the swinging docking sleeve to rotate. At the same time, the limiting member is used to limit the bar stock in the swinging docking sleeve to prevent the bar stock from shifting in the swinging docking sleeve during the swinging process.

[0041] A further setting of the present invention is that: the limiting member includes a fixing plate arranged between the two connecting rods on both sides, a through hole opened on the fixing plate, a telescopic shaft passing through the through hole, an opening opened on the swinging docking sleeve, a limiting ball arranged at one end of the telescopic shaft and abutting against the outer wall of the bar stock after passing through the opening, and a limiting spring sleeved on the telescopic shaft and connected to the fixing plate at one end and the limiting ball at the other end.

[0042] By adopting the above technical solution, under the action of the elastic restoring force of the limiting spring, the limiting ball can be driven to pass through the opening on the swinging docking sleeve and abut against the outer wall of the bar stock, so as to realize the limitation of the bar stock in the swinging docking sleeve. Description of the Drawings

[0043] Figure 1 is the process flow chart of the present invention;

[0044] Figure 2 is the structural schematic diagram of the connection relationship between the electric furnace, the heating coil and the feeding device in the present invention;

[0045] Figure 3 is the structural schematic diagram of the connection relationship between the heating coil and the feeding device in the present invention;

[0046] Figure 4 is the enlarged structural view of the pushing component in the present invention. At this time, the end of the swinging material taking table abuts against the inside of the semi-circular extension pipe, the side of the swinging material taking table blocks the last but one bar stock at the lowest end of the blanking plate, and at the same time, the lower end of the blocking rod is located above the position between the second last bar stock and the last but one bar stock;

[0047] Figure 5 is the structural plan view of the pushing component in the present invention. At this time, after the first push rod rotates upward, it drives the end of the swinging material taking table close to the blanking plate to swing downward. After the blocking rod moves downward, it blocks the second last bar stock, and the last but one bar stock falls into the swinging material taking table during the downward swing of the swinging material taking table; the rotation direction of the driving shaft is indicated by an arrow;

[0048] Figure 6 It is an enlarged view of the lower side position structure of the swing material taking table and the semi-circular extension pipe in the present invention;

[0049] Figure 7 It is a partial enlarged view of the connection relationship among the support plate, the guide pipe, the semi-circular extension pipe, the swing docking sleeve and the swing member in the present invention;

[0050] Figure 8 It is a partial enlarged view of the connection relationship between the swing docking sleeve and the limiting member in the present invention.

[0051] Reference signs: 1, electric furnace; 11, heating coil; 2, feeding device; 21, support plate; 211, support table; 22, guide pipe; 23, blanking plate; 24, bin; 25, blanking plate; 26, pushing assembly; 261, connecting table; 262, first column; 263, swing material taking table; 264, semi-circular extension pipe; 265, baffle plate; 266, connecting arm; 267, blocking rod; 268, driving member; 2681, guide plate; 2682, connecting spring; 2683, second column; 2684, servo motor; 2685, driving shaft; 2686, first push rod; 26861, guide wheel; 2687, second push rod; 26871, straight rod; 26872, arc rod; 2688, first strip hole; 2689, second strip hole; 3, swing docking sleeve; 4, swing member; 41, swing shaft; 42, swing motor; 43, connecting rod; 5, limiting member; 51, fixing plate; 52, through hole; 53, telescopic shaft; 54, opening; 55, limiting ball; 56, limiting spring; 6, bar stock. Embodiment

[0052] The present invention will be further described in detail below with reference to the accompanying drawings.

[0053] A production process of a solenoid valve body, referring to Figure 1 , the production process of the solenoid valve body includes the following steps:

[0054] S1: Bar stock cutting - cutting the long bar stock according to the required size of the bar stock to cut off the short bar stock for subsequent processing;

[0055] S2: Surface cleaning - grinding and rust removing the surface of the cut bar stock by a milling machine;

[0056] S3: Electric furnace heating - heating the bar stock in stages by two groups of heating coils 11 connected to the electric furnace 1 (referring to Figure 2 );

[0057] S4: Upsetting pretreatment - upsetting the bar stock with an air hammer with a falling part mass of 750 kg to change the shape of the round bar stock;

[0058] S5: Die forging - forming the bar stock using a die;

[0059] S6: Machine tool processing - cutting and drilling the formed valve body using a numerically controlled machine tool.

[0060] Refer to Figure 2 , Figure 3 , in the electric furnace heating stage, a feeding device 2 is arranged on one side of the electric furnace 1. The feeding device 2 is used to add multiple bar stocks 6 into the heating coil 11 one by one. The feeding device 2 includes a support plate 21, a guide tube 22, a blanking plate 23, a bin 24, a blanking plate 25, and a pushing assembly 26. The support plate 21 is fixed to the outer wall of the electric furnace 1 by bolts and supports the lower sides of two groups of heating coils 11. The lower side of the guide tube 22 is fixed to the support plate 21 by bolts and passes through two groups of heating coils 11. The length of the guide tube 22 is equal to the sum of the lengths of the two groups of heating coils 11. The sum of the lengths of the two groups of guide tubes 22 is equal to the sum of the lengths of ten bar stocks 6. At the same time, the blanking plate 23 is fixed to one end of the support plate 21 by bolts, and the blanking plate 23 can be used for the bar stock 6 that has been heated in the guide tube 22 to fall. The bin 24 is located at one end of the support plate 21 away from the blanking plate 23, and multiple heated bar stocks 6 are stacked and stored in the bin 24. The blanking plate 25 is integrally arranged on the lower side of the bin 24. The upper end of the blanking plate 25 is connected to the discharge port on the lower side of the bin 24, and the lower end extends obliquely downward. The blanking plate 25 can be used for the bar stock 6 in the bin 24 to roll down. The cross-sections of both the blanking plate 25 and the blanking plate 23 are in a "U" shape. At the same time, the cross-sectional width of the blanking plate 25 is equal to the length of the bar stock 6, and the extending direction of the blanking plate 25 is perpendicular to the extending direction of the guide tube 22.

[0061] Refer to Figure 2 , Figure 4, the pushing component 26 is arranged on the support plate 21 and is used to push the multiple bar materials 6 rolling down in the blanking plate 25 into the guiding tube 22 one by one. This kind of pushing component 26 includes a connecting platform 261, a first upright post 262, a swinging material taking platform 263, a semi-circular extension tube 264, a material blocking plate 265, a connecting arm 266, a blocking rod 267, and a driving part 268. Among them, the connecting platform 261 is welded to one end of the support plate 21 away from the blanking plate 23, and the lower side of the connecting platform 261 is supported on the ground on one side of the electric furnace 1 through a support column, while the material bin 24 is fixed above one side of the connecting platform 261 by bolts. At the same time, the lower end of the first upright post 262 is welded to the connecting platform 261 and is located on one side close to the lower end of the blanking plate 25, and the lower side of the swinging material taking platform 263 is hinged to the upper end of the first upright post 262 and its cross section is V-shaped, and the end of the swinging material taking platform 263 close to the blanking plate 25 is closed. Among them, the semi-circular extension tube 264 is arranged at the end position of the guiding tube 22, and when the swinging material taking platform 263 swings, its end can abut against the inside of the semi-circular extension tube 264. Among them, the material blocking plate 265 is L-shaped, and the material blocking plate 265 is integrally arranged at the end of the swinging material taking platform 263 close to the blanking plate 25, and the material blocking plate 265 is located at the side position of the swinging material taking platform 263 away from the blanking plate 25.

[0062] Refer to Figure 2 , Figure 4 , Figure 5 , the lower end of the connecting arm 266 is integrally arranged on the upper side of the material blocking plate 265, and the connecting arm 266 is L-shaped, while the upper end of the blocking rod 267 is welded to the upper end of the connecting arm 266. Among them, the blocking rod 267 extends vertically downward. When the swinging material taking platform 263 swings, the second-to-last bar material 6 at the lowermost end of the blanking plate 25 can be blocked through the blocking rod 267. When the end of the swinging material taking platform 263 abuts against the inside of the semi-circular extension tube 264, the side of the end of the swinging material taking platform 263 away from the semi-circular extension tube 264 blocks the last bar material 6 at the lowermost end of the blanking plate 25, and at the same time, the lower end of the blocking rod 267 is located above the position between the second-to-last bar material 6 and the last bar material 6.

[0063] Refer to Figure 4 , Figure 5 , Figure 6, the driving member 268 is arranged on the connecting table 261 and is used to drive the swinging material taking table 263 to swing back and forth to send the bar 6 into the semi-circular extension pipe 264; this driving member 268 includes a guide plate 2681, a connecting spring 2682, a second upright post 2683, a servo motor 2684, a driving shaft 2685, a first push rod 2686, a second push rod 2687, a first strip-shaped hole 2688, and a second strip-shaped hole 2689. The guide plate 2681 is welded to the side of the swinging material taking table 263 away from the blanking plate 25, and the extending direction of the guide plate 2681 is parallel to the extending direction of the swinging material taking table 263. At the same time, the upper end of the connecting spring 2682 is welded to one end of the guide plate 2681 away from the blanking plate 25, and the lower end is welded to the connecting table 261, and the connecting spring 2682 is in a stretched state; the lower end of the second upright post 2683 is welded to the connecting table 261, and the servo motor 2684 is fixed to the upper end of the second upright post 2683 by bolts. At the same time, the driving shaft 2685 is welded to the output shaft of the servo motor 2684, and the extending direction of the driving shaft 2685 is perpendicular to the extending direction of the swinging material taking table 263; one end of the first push rod 2686 is welded to the driving shaft 2685, and at the same time, the end of the first push rod 2686 away from the driving shaft 2685 is rotatably connected to a guide wheel 26861 for abutting against the guide plate 2681; one end of the second push rod 2687 is also welded to the driving shaft 2685. The first strip-shaped hole 2688 is opened on the lower side of the swinging material taking table 263 for the second push rod 2687 to pass through, and the second strip-shaped hole 2689 is opened on the lower side of the semi-circular extension pipe 264 for the second push rod 2687 to pass through, and the first strip-shaped hole 2688 and the second strip-shaped hole 2689 are communicated; at the same time, the second push rod 2687 includes a straight rod 26871 and an arc rod 26872. One end of the straight rod 26871 is welded to the driving shaft 2685. One end of the arc rod 26872 is integrally connected to the end of the straight rod 26871 away from the driving shaft 2685. The arc rod 26872 is arc-shaped and is used to pass through the first strip-shaped hole 2688 and the second strip-shaped hole 2689 and then abut against the end face of the bar 6. At this time, the second push rod 2687 can be used to push the bar 6 into the semi-circular extension pipe 264.

[0064] Refer to Figure 2 , Figure 7, a support platform 211 is also welded on the support plate 21. The lower side of the semi-circular extension pipe 264 is welded on the upper side of the support platform 211, and the extension direction of the support platform 211 is parallel to the extension direction of the semi-circular extension pipe 264. A swing docking sleeve 3 is arranged between the semi-circular extension pipe 264 and the guide pipe 22. The swing docking sleeve 3 abuts against the support platform 211 and a bar stock 6 is inserted therein. At the same time, a swing member 4 is arranged on the support plate 21 for driving the swing docking sleeve 3 to swing and then driving the bar stock 6 therein away from the heating coil 11. The swing member 4 includes a swing shaft 41, a swing motor 42 and two connecting rods 43. The swing shaft 41 is rotatably connected to the support plate 21 through a bearing seat and is located on one side of the support platform 211. The swing motor 42 is fixed to the support plate 21 by bolts and the output shaft is connected to the end of the swing shaft 41. Two connecting rods 43 are welded between the swing shaft 41 and the swing docking sleeve 3.

[0065] Refer to Figure 7 , Figure 8 , a limiting member 5 for limiting the bar stock 6 in the swing docking sleeve 3 is also arranged between the two connecting rods 43. The limiting member 5 includes a fixing plate 51, a through hole 52, a telescopic shaft 53, an opening 54, a limiting ball 55 and a limiting spring 56. The fixing plate 51 is welded between the two connecting rods 43. The through hole 52 is opened in the middle of the fixing plate 51. The telescopic shaft 53 passes through the through hole 52. The opening 54 is opened on the swing docking sleeve 3. The limiting ball 55 is welded to one end of the telescopic shaft 53 and abuts against the outer wall of the bar stock 6 after passing through the opening 54. The limiting spring 56 is sleeved on the telescopic shaft 53. One end of the limiting spring 56 is connected to the fixing plate 51 and the other end is connected to the limiting ball 55. The limiting ball 55 is pushed towards the opening 54 by the limiting spring 56.

[0066] Principle: During the heating process of the electric furnace 1, two groups of electric heating coils are required to heat the bar stock 6 in stages. At this time, multiple bar stocks 6 are stacked and stored in the material bin 24, and the bar stocks 6 can roll down along the blanking plate 25 in the material bin 24. Among them, after the servo motor 2684 drives the drive shaft 2685 to rotate, since one end of the first push rod 2686 on the drive shaft 2685 is connected to the drive shaft 2685 and the other end abuts against the guide plate 2681, and at the same time, the upper end of the connecting spring 2682 is connected to the end of the guide plate 2681 away from the blanking plate 25 and the lower end is connected to the connecting platform 261, the swing material taking table 263 can be driven to swing back and forth through the cooperation of the first push rod 2686 and the connecting spring 2682.

[0067] When taking materials with the swinging material taking table 263, driven by the servo motor 2684, after rotating upward through the first push rod 2686, the end of the swinging material taking table 263 close to the blanking plate 25 swings downward. At this time, the blocking rod 267 moves downward to block the penultimate blank 6, and the last blank 6 falls into the swinging material taking table 263 during the downward swing of the swinging material taking table 263, thus completing the process of taking a blank 6 on the swinging material taking table 263.

[0068] When the material taking is completed and the blank 6 needs to be pushed into the semi-circular extension pipe 264, at this time, as the servo motor 2684 continues to drive the first push rod 2686 to rotate, the swinging material taking table 263 can be driven to swing in the reverse direction through the cooperation of the first push rod 2686 and the connecting spring 2682; when the end of the swinging material taking table 263 abuts against the inside of the semi-circular extension pipe 264 and the blank 6 slides to the end of the semi-circular extension pipe 264, due to the blocking effect of the blank 6 originally existing on the semi-circular extension pipe 264, the blank 6 sliding on the swinging material taking table 263 is often located between the swinging material taking table 263 and the semi-circular extension pipe 264. At this time, the servo motor 2684 is used to continue driving the drive shaft 2685 to rotate, the first push rod 2686 continues to rotate downward around the drive shaft 2685, and the second push rod 2687 can rotate upward. By using the first strip-shaped hole 2688 opened on the lower side of the swinging material taking table 263 and the second strip-shaped hole 2689 opened on the lower side of the semi-circular extension pipe 264, after the second push rod 2687 rotates upward, it can enter the first strip-shaped hole 2688 and the second strip-shaped hole 2689. Subsequently, the arc-shaped rod 26872 of the second push rod 2687 can push the blank 6 on the swinging material taking table 263 into the semi-circular extension pipe 264, and the blank 6 originally existing in the semi-circular extension pipe 264 can be pushed toward the guide pipe 22.

[0069] As the servo motor 2684 continues to drive the drive shaft 2685 to rotate, after the second push rod 2687 completes the action of pushing the blank 6, it can rotate downward. At this time, the first push rod 2686 can rotate upward, so as to drive the swinging material taking table 263 to swing again through the first push rod 2686 and complete the material taking action; finally, the feeding of the blanks 6 in the guide pipe 22 one by one can be completed.

[0070] When there is no need to feed materials with the swinging material taking table 263, the elastic restoring force of the connecting spring 2682 is used to keep the end of the swinging material taking table 263 in contact with the inside of the semi-circular extension pipe 264. At this time, the side of the swinging material taking table 263 far from the semi-circular extension pipe 264 blocks the last blank 6 at the lowermost end of the blanking plate 25, and at the same time, the lower end of the blocking rod 267 is located above the position between the penultimate blank 6 and the last blank 6.

[0071] This specific embodiment is only an interpretation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art may make modifications to this embodiment that do not contribute creatively as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A production process for a solenoid valve body, comprising the following steps: S1: Bar cutting - cutting the long bar according to the required size of the bar; S2: Surface cleaning - grinding and rust removal of the cut bar by a milling machine; S3: Electric furnace heating - heating the bar in stages by two groups of heating coils (11) connected to the electric furnace (1), wherein a feeding device (2) is used to add multiple bars into the heating coils (11) one by one. The feeding device (2) includes a support plate (21) provided on the outer wall of the electric furnace (1) and supporting the lower side of the heating coils (11), a guide tube (22) provided on the support plate (21) and passing through the two groups of heating coils (11), a blanking plate (23) provided at one end of the support plate (21) for the bar heated in the guide tube (22) to fall, a storage bin (24) provided at the end of the support plate (21) away from the blanking plate (23) for stacking multiple heated bars up and down, a blanking plate (25) provided below the storage bin (24) for the bar to roll down, and a pushing component (26) provided on the support plate (21) for pushing the multiple bars rolling in the blanking plate (25) into the guide tube (22) one by one; S4: Upsetting pretreatment - upsetting the bar with an air hammer with a falling part mass of 750 kg to change the shape of the round bar; S5: Die forging forming - forming the bar with a die; S6: Machine tool processing - cutting and drilling the formed valve body with a numerical control machine tool; The blanking plate (25) is inclined downward and the extending direction is perpendicular to the extending direction of the guide tube (22). The pushing component (26) includes a connecting table (261) connected to one end of the support plate (21) away from the blanking plate (23), a first upright column (262) provided on the connecting table (261) and close to the lower end side of the blanking plate (25), a swing material taking table (263) with a V-shaped cross-section and hinged to the upper end of the first upright column (262) at the lower side, a semi-circular extension tube (264) provided at the end of the guide tube (22) for one end of the swing material taking table (263) to swing and abut against, a baffle plate (265) provided at one end of the swing material taking table (263) and located on the side away from the blanking plate (25), a connecting arm (266) provided above the baffle plate (265), a blocking rod (267) provided at the upper end of the connecting arm (266) and extending vertically downward for blocking the second last bar at the lowermost end of the blanking plate (25), and a driving member (268) provided on the connecting table (261) for driving the swing material taking table (263) to swing back and forth to send the bar into the semi-circular extension tube (264); when the end of the swing material taking table (263) abuts in the semi-circular extension tube (264), the side of the swing material taking table (263) away from the semi-circular extension tube (264) blocks the last bar at the lowermost end of the blanking plate (25), and at the same time, the lower end of the blocking rod (267) is located above the position between the second last bar and the last bar; The driving member (268) includes a guide plate (2681) disposed at the side of the end of the swinging material taking table (263) away from the blanking plate (25), a connecting spring (2682) with its upper end connected to the end of the guide plate (2681) away from the blanking plate (25) and its lower end connected to the connecting table (261), a second upright post (2683) disposed on the connecting table (261), a servo motor (2684) disposed at the upper end of the second upright post (2683), a driving shaft (2685) disposed on the output shaft of the servo motor (2684), a first push rod (2686) with one end connected to the driving shaft (2685) and the other end for abutting against the guide plate (2681), a second push rod (2687) with one end connected to the driving shaft (2685) and for pushing the bar stock into the semi-circular extension tube (264), a first elongated hole (2688) opened on the lower side of the swinging material taking table (263) for the second push rod (2687) to pass through, and a second elongated hole (2689) opened on the lower side of the semi-circular extension tube (264) for the second push rod (2687) to pass through; A support table (211) connected to the lower side of the semi-circular extension tube (264) is disposed on the support plate (21). A swinging docking sleeve (3) that abuts against the support table (211) and in which one bar stock is embedded is disposed between the semi-circular extension tube (264) and the guide tube (22). A swinging member (4) for driving the swinging docking sleeve (3) to swing and then driving the bar stock therein away from the heating coil (11) is disposed on the support plate (21); The swinging member (4) includes a swinging shaft (41) rotatably connected to the support plate (21) and located on one side of the support table (211), a swinging motor (42) disposed on the support plate (21) with its output shaft connected to the swinging shaft (41), and two connecting rods (43) disposed on the swinging shaft (41) and connected to the swinging docking sleeve (3). A limiting member (5) for limiting the bar stock in the swinging docking sleeve (3) is further disposed between the two connecting rods (43) on both sides.

2. The production process of a solenoid valve body according to claim 1, characterized in that: The blanking plate (25) is in a "U" shape and the cross-sectional width is equal to the length of the bar stock.

3. The production process of a solenoid valve body according to claim 1, characterized in that: The second push rod (2687) includes a straight rod (26871) with one end connected to the driving shaft (2685), and an arc rod (26872) with one end connected to the end of the straight rod (26871) away from the driving shaft (2685) and for abutting against the end face of the bar stock. The straight rod (26871) is parallel to the first push rod (2686).

4. The production process of a solenoid valve body according to claim 1, characterized in that: A guide wheel (26861) is rotatably connected to the end of the first push rod (2686) away from the driving shaft (2685).

5. The production process of a solenoid valve body according to claim 1, characterized in that: The length of the guide tube (22) is equal to the sum of the lengths of the two groups of heating coils (11), and the length of the two groups of guide tubes (22) is equal to the sum of the lengths of ten bar stocks.

6. The production process of a solenoid valve body according to claim 1, characterized in that: The limiting member (5) includes a fixing plate (51) disposed between the two side link rods (43), a through hole (52) formed in the fixing plate (51), a telescopic shaft (53) passing through the through hole (52), an opening (54) formed in the swinging docking sleeve (3), a limiting ball (55) disposed at one end of the telescopic shaft (53) and pressing against the outer wall of the bar stock after passing through the opening (54), and a limiting spring (56) sleeved on the telescopic shaft (53) and connected to the fixing plate (51) at one end and the limiting ball (55) at the other end.

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