Automatic casting method and system for lead handle

Abstract

The present invention discloses a method for automatic casting of a lead handle, comprising: conveying the preheated mold mechanism to the tightening mechanism along the extension direction of the casting line by an automatic conveying device; placing the heat-treated copper bar into the mold mechanism and closing the mold mechanism by a first robot, and then tightening the mold mechanism by the tightening mechanism; pouring molten lead into the mold mechanism tightened by the mold top structure by a soup feeding device, so that the molten lead wraps the copper bar; conveying the mold mechanism poured with molten lead to the second robot by an automatic conveying device, opening the mold mechanism by the second robot and taking out the lead handle formed by the copper bar wrapped by molten lead after cooling. The method of the present invention has a reasonable casting process flow and a high degree of automation, and can realize the automatic online casting of the lead handle and the automatic connection of the lead handle between different processes, thereby improving production efficiency and reducing the labor intensity of workers. In addition, the present invention also provides a system for the above method.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to an automatic casting method for a lead handle and a system thereof. Background Art

[0002] At present, the manufacturing process of lead handles in China is as follows: the smelting furnace first melts the solid lead into liquid; then, the liquid lead is manually poured into the mold with a spoon for casting. During the casting, the mold needs to be tightened manually to prevent leakage; after the casting is completed, the mold is opened manually to lift the molded lead handle out of the mold, and then it is manually carried to the platform. In this way, the different processes required for casting the lead handle to molding have to be completed manually, which not only has low work efficiency, but also has high labor intensity for workers, causing personal insecurity for operators in the thermal field. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide a method and system for automatically casting a lead handle.

[0004] To achieve the above-mentioned purpose of the present invention, on the one hand, the present invention provides an automatic casting system for a lead handle, which includes: a ring-shaped casting line; a casting and forming device arranged on the casting line, comprising a plurality of mold mechanisms arranged at intervals along the extension direction of the casting line and a tightening mechanism for tightening the mold mechanism passing thereunder; an automatic conveying device arranged below the casting line for conveying the plurality of mold mechanisms forward along the extension direction of the casting line; a soup feeding device arranged beside the casting line for pouring molten lead into the mold mechanism in which a copper bar has been placed; a first robot arranged near the casting line for taking the copper bar and closing the mold mechanism and a second robot for opening the mold mechanism and taking out the lead handle formed in the mold mechanism; wherein the molten lead poured into the mold mechanism by the soup feeding device wraps the copper bar, and when the molten lead cools, a lead handle with the copper bar wrapped inside is formed.

[0005] Furthermore, it also includes a mold preheating device arranged on or near the casting line for preheating the mold mechanism.

[0006] Furthermore, it also includes a copper bar preheating device arranged beside the casting line for heating the copper bars to be placed in the mold mechanism.

[0007] The casting line has a pair of guide rails arranged side by side along its extension direction, and the mold mechanism has a mold trolley installed above the pair of guide rails and moving along the pair of guide rails.

[0008] Furthermore, the mold mechanism also includes a support plate installed on the mold trolley and a casting mold installed on the support plate, and the casting mold includes: a first mold and a second mold hinged to each other; a first handle arranged on the first mold and a second handle arranged on the second mold; a mold opening pin arranged on the first mold, which is convenient for the first robot and the second robot to grasp to close or open the first mold and the second mold; a copper bar limit block arranged at the top of the first mold or the second mold; wherein the copper bar limit block is located at the top of the first mold cavity of the first mold or the top of the second mold cavity of the second mold.

[0009] Wherein, support pins for supporting and clamping the copper strip are respectively arranged in the mold cavities of the first mold and the second mold.

[0010] Wherein, the first robot and the second robot both have a gripping and mold opening mechanism, which includes: a robot gripper installed on the robot body and a mold opening hook arranged on one side of the robot gripper for closing or opening the casting mold.

[0011] Wherein, the tightening mechanism includes: a tightening bracket fixedly installed on the casting line; a lifting cylinder installed on the tightening bracket, and its piston rod is inclined and extended relative to the horizontal plane; a lifting guide rail arranged on the tightening bracket and parallel to the axial direction of the piston rod of the lifting cylinder; a C-shaped frame fixedly connected to the piston rod of the lifting cylinder and slidably connected to the lifting guide rail; a pair of clamping cylinders respectively installed on both sides of the open end of the C-shaped frame; wherein, after the casting mold is closed, the piston rods of the pair of clamping cylinders are relatively extended and respectively tightened on the relative outer sides of the casting mold.

[0012] Wherein, cylinder push heads are respectively arranged at the ends of the piston rods of the pair of clamping cylinders.

[0013] Among them, the guide rail is an I-shaped guide rail in cross section, and the automatic conveying device includes: a main beam arranged between the pair of guide rails and extending in a direction parallel to the guide rails; a walking roller assembly arranged at the bottom of the main beam, having multiple pairs of walking rollers that travel along the lower rails of the pair of guide rails; a driving mechanism arranged below the main beam and used to push the main beam forward or backward along the extension direction of the casting line; and a toggle assembly installed on the main beam and used to toggle the mold mechanism forward when the main beam moves forward.

[0014] Among them, the shifting assembly includes: a pair of bearings installed on both sides of the main beam; a rotating shaft supported by a pair of bearings at both ends; a pair of shift forks fixedly connected to the two ends of the rotating shaft; and a blocking rod installed on one side of the main beam and extending in the horizontal direction for blocking the shift fork.

[0015] In addition, the present invention also provides a method for manufacturing a lead handle using the above-mentioned lead handle automatic casting system, comprising:

[0016] The preheated mold mechanism is transported to the copper bar placement station a located adjacent to the clamping mechanism along the extension direction of the casting line by an automatic transport device;

[0017] The first robot puts the heated copper strip into the mold mechanism and closes the mold mechanism, and then tightens the mold mechanism through the tightening mechanism;

[0018] The lead liquid is poured into the mold mechanism which has been tightened by the mold tightening mechanism through the pouring device, so that the lead liquid wraps the copper strip;

[0019] The mold structure poured with molten lead is transported to the second robot by an automatic transport device, and the second robot is used to open the mold structure and take out the lead handle formed by the copper strip wrapped by the molten lead after cooling.

[0020] The preheating of the mold mechanism is performed by using a mold preheating device to preheat the mold mechanism.

[0021] Wherein, after the mold mechanism is preheated, the method further includes the step of heating the copper bar by a copper bar preheating device.

[0022] Compared with the prior art, the lead handle automatic casting system and method of the embodiment of the present invention has the following advantages:

[0023] The automatic casting system for the lead handle of this embodiment has a simple structure, a reasonable casting process flow, and a high degree of automation. It can realize the automatic online casting of the lead handle and the automatic connection of the lead handle between different working steps, thereby improving production efficiency and reducing the labor intensity of workers.

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 2 is a schematic diagram of the structure of the automatic casting system for lead handles according to an embodiment of the present invention;

[0026] Figure 2 It is a partial front view of the lead handle automatic casting system according to an embodiment of the present invention;

[0027] Figure 3 is a perspective view of a casting and forming device according to an embodiment of the present invention arranged on a casting line;

[0028] Figure 4 is a perspective view of a mold mechanism according to an embodiment of the present invention arranged on a casting line;

[0029] Figure 5 is a perspective view of an automatic conveying device according to an embodiment of the present invention (the driving cylinder is not shown);

[0030] Figure 6 It is a partially enlarged schematic diagram of the automatic conveying device according to an embodiment of the present invention;

[0031] Figure 7 is a perspective view of a mold mechanism of an embodiment of the present invention from a first viewing angle;

[0032] Figure 8 is a perspective view of the mold mechanism of an embodiment of the present invention from a second viewing angle;

[0033] Fig. 9 is a schematic diagram of a mold mechanism according to an embodiment of the present invention from a third viewing angle;

[0034] Fig.10 is a perspective view of a casting mold without copper bars placed therein in an embodiment of the present invention;

[0035] Fig.11 is a perspective view of placing copper bars in a casting mold according to an embodiment of the present invention;

[0036] Fig.12 is a perspective view of a gripping and mold opening mechanism of a robot according to an embodiment of the present invention;

[0037] Fig.13 is a perspective view of a copper bar limit block according to an embodiment of the present invention;

[0038] Fig.14 is a perspective view of a tightening mechanism according to an embodiment of the present invention;

[0039] Fig.15 Schematic diagram of a clamping mechanism for clamping a mold according to an embodiment of the present invention;

[0040] Fig.16 It is a schematic diagram of pouring lead liquid into a mold mechanism by a soup feeding device according to an embodiment of the present invention;

[0041] Fig.17 is a perspective view of a copper strip preheating device according to an embodiment of the present invention;

[0042] Fig.18 Schematic diagram of a copper bar preheating device according to an embodiment of the present invention in which a copper bar is placed (with the upper cover and side panels removed);

[0043] Fig.19 2 is a schematic structural diagram of a casting mold with a mold support plate according to an embodiment of the present invention;

[0044] Fig. 20 2 is a schematic diagram of the structure of a copper bar stacking platform according to an embodiment of the present invention;

[0045] Fig.21 It is a structural schematic diagram of a lead handle stacking platform according to an embodiment of the present invention;

[0046] Fig. 22It is a flow chart of the automatic casting method of the lead handle according to the embodiment of the present invention. DETAILED DESCRIPTION

[0047] like Figure 1 As shown, it is a structural schematic diagram of the automatic casting system of the lead handle provided in an embodiment of the present invention. As can be seen from the figure, the automatic casting system of the lead handle in this embodiment includes: a ring-shaped casting line 2; a casting and forming device arranged on the casting line, having a plurality of mold mechanisms 4 arranged at intervals along the extension direction of the casting line 2 and a tightening mechanism 5 for tightening the mold mechanism 4 passing thereunder; an automatic conveying device 3 arranged below the casting line 2 for conveying the plurality of mold mechanisms 4 forward along the extension direction of the casting line 2; a soup feeding device 8 arranged beside the casting line 2 for pouring molten lead into the mold mechanism 4 in which the copper bar 16 is placed; a first robot 10 arranged near the casting line 2 for taking the copper bar 16 and closing the mold mechanism 4, and a second robot 7 for opening the mold mechanism 4 and taking out the lead handle formed in the mold mechanism 4; wherein, the molten lead poured into the mold mechanism 4 by the soup feeding device 8 wraps the copper bar 16, and when the molten lead is cooled, a lead handle with the copper bar 16 wrapped inside is formed. In addition, it also includes a mold preheating device arranged on or near the casting line 2 for preheating the mold mechanism 4, a copper bar preheating device 11 arranged next to the casting line 2 for heating the copper bars 16 to be placed in the mold mechanism 4, a copper bar stacking platform 12 for placing the copper bars 16, a lead handle stacking platform 14 for storing lead handles, a lead melting furnace 9 for melting molten lead and an electric control cabinet 13, a main control cabinet 1, etc.

[0048] Specifically, Figure 1 As shown, the casting line 2 of this embodiment is ring-shaped, and has a pair of guide rails 21 supported by the casting platform and extending in parallel. The ends of each guide rail are connected to form a closed long ring, so that the mold mechanism 4 of the casting forming device can be circulated on the casting line.

[0049] Seen from the direction of the length extension of the casting line 2, a copper bar preheating device 11, a first robot 10, a lead melting furnace 9, a lead feeding device 8, and a second robot 7 are sequentially arranged beside the casting line 2, and a copper bar stacking platform 12 is arranged near the first robot 10, and a lead handle stacking platform 14 is arranged near the second robot 7. In addition, a mold preheating device (not shown in the figure) is also included, and the mold preheating device can adopt a U-shaped electric heating tube in the prior art.

[0050] In addition to the above-mentioned devices, the present embodiment sequentially arranges a copper bar placing station a, a lead handle casting station b and a lead handle removing station c on the casting line (such as Figure 2As shown in the figure, the copper bar after heating treatment is placed in the mold mechanism 4 of the casting and forming device at the copper bar placing station a, the lead liquid is poured into the mold mechanism 4 in which the copper bar is placed at the lead handle casting station b, and the formed lead handle in the mold mechanism 4 transferred thereto is taken out at the lead handle taking-out station c. When arranging the various devices, the jacking mechanism 5 of the casting and forming device is arranged at the lead handle casting station b, and the first robot 10 is arranged near the copper bar placing station a and the lead handle casting station b, and the second robot 7 is arranged near the lead handle taking-out station c.

[0051] The guide rail 21 of this embodiment is an I-shaped guide rail (such as Fig.15 As shown), a plurality of mold mechanisms 4 are sequentially arranged above a pair of guide rails 21. The plurality of mold mechanisms 4 are cyclically driven along the casting line under the action of the automatic conveying device 3, and successively pass through the above-mentioned three stations to complete the automatic casting production of the lead handle.

[0052] like Figure 3 , Figure 4 , Figure 7-Figure 11 As shown, the mold mechanism 4 of this embodiment includes: a mold trolley 41 installed above a pair of guide rails 21, and multiple pairs of rollers (two pairs are shown in the figure) that can travel along the upper rails of the pair of guide rails 21 are installed on both sides of the bottom thereof. Correspondingly, a running groove for the rollers to travel can be set on the upper rails of the guide rails 21; a support plate 42 installed on the mold trolley 41; and a casting mold 43 installed on the support plate 42. When designed, the support plate 42 includes an inclined plate installed obliquely and a vertical support column for supporting the inclined plate. The inclined plate and the support column can be fixed to the upper surface of the mold trolley 41 respectively, or the two can be fixedly assembled and then fixed to the upper surface of the mold trolley 41 by bolts. The casting mold 43 is fixed to the inclined plate by bolts. Preferably, the inclination angle of the inclined plate relative to the vertical plane is about 75 degrees.

[0053] Among them, Fig.10 , Fig.11As shown, the casting mold 43 of this embodiment includes: a first mold 431 and a second mold 436 whose sides are hinged to each other through a chain, and the back side of the second mold 436 is placed on the outer surface of the inclined plate; a first handle 433 arranged on the first mold 431 and a second handle 437 arranged on the second mold 436; a mold opening pin 432 arranged on the first mold 431, which is convenient for the first robot 10 and the second robot 7 to grab and close or open the first mold 431 and the second mold 436; and a copper bar stopper 430 arranged at the top of the first mold 431 or the second mold 436. The copper bar stopper 430 is located at the top of the first mold cavity 435 of the first mold 431 or the top of the second mold cavity 439 of the second mold 436, and the shapes of the first mold cavity 435 and the second mold cavity 439 are determined according to the shapes of the lead handles to be cast.

[0054] like Fig.11 As shown, the copper bar stopper 430 of this embodiment is located at the top of the second mold cavity 439 of the second mold 436. When designing, the copper bar stopper 430 is used as follows: Fig.13 The structure shown is as follows: one side thereof is fixedly mounted in the second mold cavity 439 of the second mold 436 and is located at the top of the second mold cavity 439, and the other side 9 thereof (i.e., the side facing the first mold) is provided with a groove, and the groove runs through the thickness of the copper bar stopper 430, so that the copper bar can pass through the groove and be clamped by the copper bar stopper 430. The inside of the groove provided by the copper bar stopper 430 should have a certain distance from the inside of the second mold cavity 439, so that when the copper bar 16 is clamped by the copper bar stopper 430, lead liquid can also be cast inside the copper bar and the second mold cavity 439. Accordingly, an opening groove is provided at the position corresponding to the position of the copper bar stopper 430 in the first mold cavity 435 of the first mold 431 for inserting the copper bar stopper 430 and for pouring lead liquid when the two molds are closed, and the opening groove is connected with the first mold cavity, so that when the two molds are closed, the poured lead liquid is poured into the first mold cavity and the second mold cavity from the opening groove and wraps the copper bar. In order to prevent the copper bar placed in the second mold cavity 439 from fitting into the two mold cavities, support pins 434 for supporting and clamping the copper bar 16 are respectively arranged in the mold cavities of the first mold 431 and the second mold 436. The support pin 434 can be a pin shaft whose axis extends along the depth direction of the mold cavity.

[0055] Among them, in this embodiment, a first handle 433, a second handle 437 and a mold opening pin 432 for facilitating the opening and closing of the mold are respectively provided on the first mold and the second mold of the casting mold. The mold can be opened and closed by manually holding the first handle 433 and the second handle 437, and the mold can be opened and closed by a robot hooking the mold opening pin 432. In addition, a recess 438b is provided in the middle position of the second mold, and a protrusion 438a is provided in the middle position of the first mold, and when the first mold and the second mold are closed, the protrusion 438a can be embedded in the recess 438b. With such a structure, the robot can conveniently remove the molded lead handle from the casting mold: after opening the mold, the robot can clamp the side of the molded lead handle from the upper and lower sides of the recess of the second mold through the robot gripper of this embodiment, so that the lead handle can be removed from the mold cavity of the second mold.

[0056] In order to facilitate the use of robots to open and close the casting mold, Fig.12 As shown, the first robot 10 and the second robot 7 of this embodiment both have a grasping structure installed on the robot body, and the grasping structure includes a robot gripper 73 connected to the robot body through a connecting seat 71 and a mold opening hook 72 arranged on one side of the robot gripper 73 for closing or opening the casting mold 43, wherein the robot body can adopt a six-axis multi-purpose robot of the prior art, and the difference is that the grasping structure of the six-axis multi-purpose robot is replaced by the grasping structure with a mold opening hook of this embodiment. When in use, by rotating the grasping structure of the robot, the mold opening hook 72 can hook the mold opening pin 432 of the casting mold in the horizontal direction (the mold opening pin extends in the vertical direction), so that the robot can perform the action of opening and closing the two molds.

[0057] After the mold is opened, when the first mold is opened to a certain angle, in order to facilitate the robot's grasping structure to switch the grasping form (i.e., switch between the mold opening hook 72 and the robot gripper 73), after the first mold is opened by using the mold opening hook 72, the robot gripper 73 is used to grasp the formed lead handle. In this embodiment, a mold support plate 439a (such as a mold support plate 439b) that can be used to support the first mold after the first mold is opened can be provided on the second mold. Fig.19 As shown), during the design, the mold support plate 439a can be fixedly mounted on the back side of the second mold at one end for connecting with the first mold through a hinge. It is a long strip plate, extending a certain length from the back side of the second mold toward the direction of the first mold to support the opened first mold. The extension length of the long strip plate can be determined according to the opening angle of the first mold relative to the second mold.

[0058] The casting mold of this embodiment adopts the above-mentioned structure, and then uses a robot to open and close the mold and pick up the workpiece. Compared with the prior art that uses manual opening and closing of the mold and prying of the workpiece, which easily causes secondary damage to the workpiece, in addition to the quick and convenient opening and closing of the mold, it also avoids damage to the formed lead handle, thereby improving product quality.

[0059] In this embodiment, lead liquid is poured into the two molds of the mold mechanism to obtain a molded lead handle. Before pouring the lead liquid, a tightening mechanism 5 is used to tighten the two molds of the mold mechanism 4. Figure 14-16 As shown, the clamping mechanism 5 of this embodiment includes: a clamping bracket 51 fixedly mounted on the casting line 2; a lifting cylinder 55 mounted on the clamping bracket 51, whose piston rod is inclined and extended relative to the horizontal plane (the axis of the piston rod is parallel to the inclined direction of the inclined plate); a lifting guide rail 53 arranged on the clamping bracket 51 and parallel to the axial direction of the piston rod of the lifting cylinder 55; a C-shaped frame 52 fixedly connected to the piston rod of the lifting cylinder 55 and slidably connected to the lifting guide rail 53; a pair of clamping cylinders 56 respectively mounted on both sides of the opening end of the C-shaped frame 52; wherein, after the casting mold 43 is closed, the piston rods of the pair of clamping cylinders 56 are relatively extended and respectively clamped against the opposite outer sides of the casting mold 43. In order to prevent damage to the casting mold 43, the cylinder pusher heads 54 are respectively arranged at the ends of the piston rods of the pair of clamping cylinders 56 in this embodiment, which can be made of the materials used for pusher heads in the prior art.

[0060] When the lifting cylinder 55 is working, driven by its piston rod, the C-frame 52 moves up and down along the lifting guide rail 53. When the C-frame 52 moves downward, the cylinder pushers 54 on the pair of clamping cylinders 56 on the C-frame 52 clamp the opposite sides of the first mold and the second mold of the mold-closing casting mold 43 respectively, so as to clamp the two molds to prevent the lead liquid from leaking from the mold when pouring the lead liquid. When the C-frame 52 moves upward, it can move away from the casting mold 43 that has been released by the pair of clamping cylinders 56 and the cylinder pushers 54, so that the casting mold 43 can be moved forward under the conveyance of the automatic conveying device 3, so that the next mold mechanism 4 to be poured moves to this place, that is, the lead handle casting station b.

[0061] In this embodiment, the mold trolley carries the casting mold so that the casting mold is transported forward along the extension direction of the pair of guide rails 21, and the transportation of the mold trolley on the guide rails is achieved by a pair of forks of the automatic conveying device 3 to move the mold trolley according to a certain step length. Fig.15 As shown, the automatic conveying device 3 of this embodiment is placed between a pair of guide rails 21.

[0062] Specifically, Figure 4-Figure 6As shown, the automatic conveying device 3 of this embodiment includes: a main beam 31 arranged between a pair of guide rails 21 and extending in a direction parallel to the guide rails 21; a walking roller assembly arranged at the bottom of the main beam 31, having multiple pairs of walking rollers 33 that travel along the lower rails of the pair of guide rails 21; a driving mechanism arranged below the main beam 31 and used to push the main beam 31 forward or backward along the extension direction of the casting line 2; and a toggle assembly 32 installed on the main beam 31 and used to toggle the mold mechanism 4 forward when the main beam 31 is pushed forward by the driving mechanism. Among them, the driving mechanism has a power assembly and a pushing rod 34 connected to the power assembly. The power assembly can be a cylinder, a hydraulic cylinder, or an electric transmission assembly (not shown in the figure). The axis of the pushing rod 34 is perpendicular to the length extension direction of the main beam and is fixedly installed at the bottom of the main beam. Driven by the power assembly, the main beam 31 can move forward or backward along the extension direction of the casting line 2. Figure 5 Move in the direction indicated by the arrow.

[0063] Among them, the toggle assembly 32 of this embodiment can be adopted as follows Figure 6 The structure shown includes: a pair of bearings 321 installed on both sides of the main beam 31, the bearings are seat bearings, and their seats are fixedly installed on both sides of the upper surface of the main beam 31 (the two sides refer to the two sides along the width direction of the main beam); a rotating shaft 322 with its two ends supported by a pair of bearings 321; a pair of shift forks 323 fixedly connected to the two ends of the rotating shaft 322; and a blocking rod 324 installed on one side of the main beam 31 and extending in the horizontal direction for blocking the shift fork 323.

[0064] When the main beam 31 moves forward under the drive of the driving mechanism, the shifting assembly 32 moves forward together with the main beam 31; when the top of the pair of shift forks 323 of the shifting assembly presses against the front axle 411 at the bottom of the mold trolley 41 above it, the pair of shift forks 323 will push the mold trolley 41 forward, and the pair of shift forks 323 will not break away from the contact with the front axle 411 of the mold trolley 41 under the action of the blocking rod 324. When the mold mechanism 4 pushed by the pair of shift forks 323 reaches the desired position, the main beam 31 moves backward under the drive of the driving mechanism, driving the pair of shift forks 323 to move backward. At this time, the pair of shift forks 323 break away from the front axle 411 of the mold trolley 41, and move to the rear mold mechanism under the drive of the main beam, and then push the rear mold mechanism forward when the main beam moves forward.

[0065] Among them, in this embodiment, before placing the copper bar 16 in the mold mechanism 4, the copper bar 16 needs to be heated so that when the copper bar is placed in the casting mold and molten lead is poured into the casting mold, the molten lead can wrap around the outside of the copper bar and effectively combine with the copper bar. Otherwise, when the temperature of the copper bar is low, if molten lead is poured into the casting mold, the molten lead will solidify when it contacts the copper bar and will not continue to flow downward, making the bottom of the mold cavity of the two molds empty (that is, there is no molten lead under the mold cavity), so that the lower part of the copper bar is not wrapped by the molten lead and becomes waste.

[0066] The copper strip preheating device 11 for heating the copper strip 16 in this embodiment is a copper strip heating furnace, such as Fig.17 , Fig.18 As shown, the copper bar heating furnace includes a furnace body 111 and a plurality of copper bar insertion holes 112 provided on the furnace body 111, so as to insert the copper bar 16 through the copper bar insertion holes 112. A copper bar support frame 114 and a heating resistance wire 113 located below the copper bar support frame 114 are provided in the furnace body 111 and at positions corresponding to the copper bar insertion holes 112. The copper bar support frame 114 can be made of U-shaped steel or a frame with grooves, so that when the copper bar 16 is inserted into the furnace body 111 through the copper bar insertion holes 112, it is just stuck in the groove of the copper bar support frame 114. The heating resistance wire 113 can be a resistance wire in the prior art.

[0067] When the copper bar is heated, the copper bar is placed in the copper bar preheating furnace by the first robot for preheating. After the preheating is completed, the copper bar is placed in the casting mold by the first robot, and then the casting mold 43 is closed by the first robot. The casting mold is transported to the next station (i.e., the lead handle casting station b) by the automatic transportation device, and the C-shaped frame 52 of the clamping mechanism is lowered to a suitable position to clamp the first mold and the second mold of the casting mold 43 after the mold is closed by the cylinder push heads 54 on a pair of clamping cylinders 56. After the casting mold is clamped, the soup feeding device 8 injects the lead solution in the lead melting furnace 9 from the opening groove of the first mold into the mold cavity of the mold for casting. After the casting is completed, the soup feeding device 8 is withdrawn to the lead melting furnace 9 to wait for the next casting.

[0068] Among them, the soup feeding device 8 of this embodiment can adopt a soup feeding device (such as Figure 1 , Fig.16 As shown), that is, the lead liquid is scooped from the lead melting furnace 9 by a soup feeding device, and then the lead liquid is injected into the mold cavity of the mold from the opening groove of the first mold for casting; or, the soup feeding device of this embodiment can also adopt the following pouring device, such as connecting the lead melting furnace 9 with the opening groove of the first mold through a pouring pipeline (not shown in the figure), and setting a flow control valve on the pouring pipeline to control the capacity of the casting lead liquid as needed. When in use, the driving force is provided by the lead liquid pump, and the lead liquid in the lead melting furnace 9 is pumped from the opening groove of the first mold into the mold cavity of the mold for casting according to actual needs. The copper bar heating furnace of this embodiment adopts resistance wire heating to heat the copper bar inserted into the copper bar insertion hole 112, with high heating efficiency, avoiding environmental pollution, and controllable temperature and heating rhythm. However, the prior art adopts the method of natural hot gas heating, which is inefficient, pollutes the environment with smoke and dust, and the temperature is uncontrollable and cannot realize automatic series connection of the whole line.

[0069] In order to facilitate the storage and retrieval of copper bars, a copper bar stacking platform 12 (such as Fig. 20As shown in FIG. 1 , a plurality of copper bars transported from the previous process can be placed on the copper bar stacking platform 12. In order to store the copper bars in a relatively accurate position, facilitate robot grabbing, and store a plurality of copper bars, the copper bar stacking platform 12 of this embodiment is provided with a plurality of columns of support rods on its support plate, and each column of support rods includes a plurality of rows of support rods ( Fig. 20 8 columns of support rods are shown, each column of support rods includes 3 rows of support rods), and each row of support rods is provided with multiple copper bar clamping claws from top to bottom, and the positions of the multiple copper bar clamping claws on the multiple rows of support rods correspond one to one, so that the multiple copper bar clamping claws with corresponding heights on the multiple rows of support rods can clamp the copper bar at different positions together.

[0070] In this embodiment, at the copper bar placement station a, the first robot 10 completes the copper bar removal and preheating, and then the first robot 10 completes the copper bar placement in the casting mold 43 and the closing of the casting mold 43. The action is smooth, no human intervention is required, the degree of mechanization is high, and the efficiency is high. At the lead handle removal station c, after the lead handle is cast, the second robot 7 opens the casting mold 43, and uses the robot gripper to grab the lead handle in the mold cavity of the casting mold 43 and place it on the lead handle stacking platform 14. In the prior art, the placement of the copper bar and the grabbing of the molded lead handle, and the opening and closing of the mold are all done manually, the labor intensity of the operator is high, the risk of the thermal position is high, and the work efficiency is very low compared to the use of robots in this embodiment.

[0071] After the second robot 7 grabs the formed lead handle, in order to facilitate the grabbing and placement of the second robot 7, this embodiment adopts the following method: Fig.21 The lead handle stacking platform 14 shown is used to store the cast lead handles. The lead handle stacking platform 14 has a plurality of cross-arranged support frames. When storing, the formed lead handles are placed on the support frames in an orderly manner according to the positions set in the program, which is convenient for transportation and placement. Moreover, the placement position is accurate and regular, which is also conducive to the completion of subsequent automated operations at the workstations.

[0072] In order to facilitate the accurate control of the operation of the above-mentioned devices, the present embodiment further comprises an electric control cabinet 13 and a main control cabinet 1 which are electrically connected to the above-mentioned devices.

[0073] In addition to providing the above-mentioned lead handle automatic casting system, the present invention also provides a method for automatically casting a lead handle using the above-mentioned system, such as Fig. 22 As shown, the lead handle automatic casting method of this embodiment includes:

[0074] The preheated mold mechanism 4 is transported to the copper bar placement station a adjacent to the clamping mechanism 5 along the extension direction of the casting line 2 by the automatic transport device 3;

[0075] The first robot 10 puts the heated copper bar into the mold mechanism 4 and closes the mold mechanism 4, and then tightens the mold mechanism 4 through the tightening mechanism 5;

[0076] The lead liquid is poured into the mold mechanism 4 which has been tightened by the mold tightening mechanism 5 by means of the soup feeding device 8, so that the lead liquid wraps the copper strip;

[0077] The mold mechanism 4 poured with molten lead is transported to the second robot 7 by the automatic transport device 3. The mold mechanism 4 is opened by the second robot 7 to take out the lead handle formed by the copper strip wrapped by the molten lead after cooling.

[0078] Specifically, the method of this embodiment includes the following steps:

[0079] 1. Preheat the mold mechanism 4 by using a mold preheating device, and then place the heated mold mechanism 4 on the casting line 2;

[0080] 2. Grab a copper bar from the copper bar stacking platform 12 by the robot gripper of the first robot 10 and put it into the copper bar preheating device 11 to heat the copper bar;

[0081] 3. The mold mechanism 4 that has been heated on the casting line 2 is transported to the copper bar placement station a located adjacent to the jacking mechanism 5 by the automatic conveying device 3, and then the heated copper bar is placed into the mold mechanism 4 by the robot gripper of the first robot 10. The copper bar placed into the mold mechanism 4 is supported by the support pin 434 and limited by the copper bar limit block 430, and then the mold opening pin 432 of the first mold 431 is hooked by the mold opening hook of the first robot 10 to close the mold;

[0082] 4. The C-frame 52 of the jacking mechanism 5 is moved upward by the lifting cylinder 55 of the jacking mechanism 5 to make way for the lead handle casting station b below it, and then the mold mechanism 4 after mold closing is transported to the lead handle casting station b by the automatic conveying device 3, and then the C-frame 52 is moved downward by the lifting cylinder 55, so that the cylinder push heads of a pair of clamping cylinders 56 on the C-frame 52 can respectively clamp the mold closing casting mold 43 to prevent lead liquid from leaking during casting;

[0083] 5. A preset amount of lead liquid is mortared or pumped out from the lead melting furnace by the lead feeding device 8 and injected into the casting mold 43 so as to wrap the copper strip with the lead liquid;

[0084] 6. After the lead liquid has been poured into the casting mold 43, the pair of clamping cylinders 56 of the clamping mechanism 5 are controlled to release the clamping of the mold, and the lifting cylinder 55 is controlled to drive the C-frame 52 to move upward;

[0085] 7. Use the automatic conveying device 3 to transport the mold mechanism 4 that has been cast with molten lead and released by the clamping cylinder 56 forward to the lead handle removal station c, then use the mold opening hook of the second robot 7 to hook the mold opening pin 432 of the first mold 431 to open the first mold 431, and then use the robot gripper of the second robot 7 to take out the molded lead handle formed after the lead liquid has been cooled from the second mold 436, and put it on the lead handle stacking platform 14 so that the lead handle can be subjected to subsequent process processing.

[0086] It should be noted that while the lead liquid is poured into the casting mold 43 using the soup feeding device 8, the first robot 10 can be used to place the heated copper bars into the mold mechanism 4 that has been heated and located at the copper bar placement station a, so as to continuously produce lead handles.

[0087] The automatic casting system for the lead handle in the embodiment of the present invention has a simple structure, a reasonable casting process flow, and a high degree of automation. It can realize the automatic online casting of the lead handle and the automatic connection of the lead handle between different processes, thereby improving production efficiency and reducing the labor intensity of workers.

[0088] Although the embodiments of the present invention are described in detail above, the embodiments of the present invention are not limited thereto. Those skilled in the art may modify the embodiments of the present invention based on the principles of the embodiments of the present invention. Therefore, all modifications made in accordance with the principles of the embodiments of the present invention should be understood to fall within the protection scope of the embodiments of the present invention.

Claims

1. A lead handle automatic casting system, characterized in that: include: A casting line in the shape of a ring; A casting and forming device arranged on a casting line comprises a plurality of mold mechanisms arranged at intervals along the extending direction of the casting line and a tightening mechanism for tightening the mold mechanism passing therebelow; An automatic conveying device arranged below the casting line for conveying a plurality of mold mechanisms forward along the extending direction of the casting line; A lead feeding device arranged beside the casting line for pouring molten lead into a mold mechanism in which copper bars have been placed; A first robot disposed near the casting line for taking the copper strip and closing the mold mechanism and a second robot for opening the mold mechanism and taking out the lead handle formed in the mold mechanism; Wherein, the mold mechanism comprises a casting mold, and the casting mold comprises: a first mold and a second mold hinged to each other; a first handle arranged on the first mold and a second handle arranged on the second mold; a mold opening pin arranged on the first mold, which is convenient for the first robot and the second robot to grasp to close or open the first mold and the second mold; a copper bar limit block arranged at the top of the first mold or the second mold; the copper bar limit block is located at the top of the first mold cavity of the first mold or the top of the second mold cavity of the second mold; The clamping mechanism comprises: a clamping bracket fixedly mounted on the casting line; a lifting cylinder mounted on the clamping bracket, the piston rod of which is inclined and extended relative to the horizontal plane; a lifting guide rail arranged on the clamping bracket and parallel to the axial direction of the piston rod of the lifting cylinder; a C-shaped frame fixedly connected to the piston rod of the lifting cylinder and slidably connected to the lifting guide rail; a pair of clamping cylinders respectively mounted on both sides of the opening end of the C-shaped frame; after the casting mold is closed, the piston rods of the pair of clamping cylinders are relatively extended and respectively clamped on the opposite outer sides of the casting mold; The lead liquid poured into the mold mechanism by the lead feeding device wraps the copper strip, and when the lead liquid cools down, a lead handle with the copper strip wrapped inside is formed.

2. The lead handle automatic casting system according to claim 1, characterized in that: The casting line has a pair of guide rails arranged side by side along the extending direction thereof, and the mold mechanism has a mold trolley installed above the pair of guide rails and moving along the pair of guide rails.

3. The lead handle automatic casting system according to claim 2, characterized in that: The mold mechanism also includes a support plate installed on the mold trolley, and the casting mold is installed on the support plate.

4. The lead handle automatic casting system according to claim 3, characterized in that: Support pins for supporting and clamping the copper strip are respectively arranged in the mold cavities of the first mold and the second mold.

5. The lead handle automatic casting system according to claim 4, characterized in that: Cylinder push heads are respectively arranged at the ends of the piston rods of the pair of clamping cylinders; wherein, when the lifting cylinder is working, the C-frame moves up and down along the lifting guide rail driven by its piston rod, and when the C-frame moves downward, the cylinder push heads on the pair of clamping cylinders on the C-frame respectively clamp the opposite sides of the first mold and the second mold of the casting mold after mold closing, so as to clamp the two molds to prevent the lead liquid from leaking from the mold when pouring the lead liquid; and when the C-frame moves upward, it can move away from the casting mold that has been released by the pair of clamping cylinders and the cylinder push heads, so that the casting mold can be moved forward under the transportation of the automatic conveying device, so that the next mold mechanism to be poured can be moved there.

6. The lead handle automatic casting system according to claim 5, characterized in that: The first robot and the second robot both have a gripping and mold opening mechanism, which includes: a robot gripper installed on the robot body and a mold opening hook arranged on one side of the robot gripper for closing or opening the casting mold.

7. The lead handle automatic casting system according to claim 2, characterized in that: The guide rail is an I-shaped guide rail in cross section, and the automatic conveying device comprises: A main beam disposed between the pair of guide rails and extending in a direction parallel to the guide rails; A walking roller assembly arranged at the bottom of the main beam has a plurality of pairs of walking rollers that travel along the lower rails of the pair of guide rails; A driving mechanism disposed below the main beam and used to push the main beam forward or backward along the extension direction of the casting line; A toggling assembly is installed on the main beam and is used to toggle the mold mechanism forward when the main beam moves forward.

8. The lead handle automatic casting system according to claim 7, characterized in that: The toggle assembly comprises: A pair of bearings mounted on both sides of the main beam; A rotating shaft supported by a pair of bearings at both ends; A pair of shift forks fixedly connected to both ends of the rotating shaft; A blocking rod is installed on one side of the main beam and extends in a horizontal direction to block the shift fork.

9. A method for manufacturing a lead handle using the lead handle automatic casting system according to any one of claims 1 to 8, comprising: The preheated mold mechanism is transported to the copper bar placement station a located adjacent to the clamping mechanism along the extension direction of the casting line by an automatic transport device; The first robot puts the heated copper strip into the mold mechanism and closes the mold mechanism, and then tightens the mold mechanism through the tightening mechanism; The lead liquid is poured into the mold mechanism which has been tightened by the mold tightening mechanism through the pouring device, so that the lead liquid wraps the copper strip; The mold structure poured with molten lead is transported to the second robot by an automatic transport device so that the mold structure can be opened by the second robot and the lead handle formed by the copper strip wrapped by the molten lead after cooling inside is taken out.

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