A high-precision welding apparatus for welding a gear

Abstract

The application discloses a high-precision welding device for welding gears, comprising a base, a welding unit arranged on one side of the base, a magnetic turntable horizontally arranged on the top surface of the base, and a clamping piece arranged on the top surface of the magnetic turntable; the gear body comprises a wheel core, a gear ring and a spoke arranged between the wheel core and the gear ring, and welding seams are arranged between the spoke and the gear ring and the wheel core; the welding seams are filled with positioning pieces, and the maximum distance between the positioning pieces and the top surface of the magnetic turntable is smaller than the maximum distance between the spoke and the top surface of the magnetic turntable. The wheel core, the gear ring and the spoke are adsorbed by the magnetic adsorption piece, so that the gear body is fixed, and the stability of the gear fixing is improved; the wheel core, the gear ring and the spoke are positioned by the clamping piece, so that the positioning precision and stability of the gear body are improved, and the quality of the gear product is improved; the welding seams of the gear body are filled with the positioning pieces, so that the positioning precision and stability between the wheel core, the gear ring and the spoke are further improved, and the quality of the gear product is further improved.

Description

Technical Field

[0001] This invention belongs to the field of gear processing technology, and in particular relates to a high-precision welding equipment for welding gears. Background Technology

[0002] Welded gears have advantages such as low material cost and light weight, and are an inevitable trend in gear development. At present, many manufacturing industries have introduced and researched this technology and achieved good results, making welded gears applicable to the large gear manufacturing industry.

[0003] Existing welded gears typically consist of a core, spokes, and a gear ring. During the welding process, if precise positioning between the core, spokes, and gear ring cannot be achieved, misalignment between the gear ring and core in the final gear will occur. This misalignment causes the gear ring to run out of rotation, increasing the impact force between gears, accelerating tooth surface wear, generating noise and vibration, and reducing transmission accuracy and gear life. Therefore, it is necessary to improve the welding equipment in the existing technology. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a welding equipment for gears, which improves the positioning accuracy between the gear core, spokes and gear ring, and improves the quality of the finished gear.

[0005] To achieve the above objectives, the specific technical solution of the welding gear welding equipment of the present invention is as follows: A gear welding device includes a high-precision welding device for welding gears, comprising a base, a welding unit disposed on one side of the base, a magnetic turntable horizontally disposed on the top surface of the base, and a clamping member disposed on the top surface of the magnetic turntable. Both the magnetic turntable and the clamping member are used to fix the gear body. The gear body includes a gear core, a gear ring, and spokes disposed between the two. Each spoke has a weld seam between itself and the gear ring and the gear core. The weld seam is filled with a positioning member. The maximum distance between the positioning member and the top surface of the magnetic turntable is less than the maximum distance between the spokes and the top surface of the magnetic turntable.

[0006] Preferably, in order to achieve clamping and positioning of the gear ring and the wheel core, as well as supporting and positioning of the wheel spokes 102, the clamping member includes a wheel core positioning ring and a gear ring positioning ring concentrically arranged on the top surface of the magnetic turntable. The top surface of the wheel core positioning ring and the gear ring positioning ring is provided with an annular wheel spoke support plate. The wheel core positioning ring and the gear ring positioning ring are each circumferentially spaced with at least three guide holes. The guide holes extend axially along the gear ring positioning ring, and the guide holes are slidably fitted with abutment blocks along their extension direction. The magnetic turntable, the gear ring positioning ring, the wheel core positioning ring, and the wheel spoke support plate enclose a sealed inner cavity for accommodating the thrust unit. Each abutment block is drively connected to the thrust unit.

[0007] Preferably, in order to facilitate the support of spokes of different thicknesses, the spoke support plate is detachably connected to the magnetic turntable, and there are multiple spoke support plates, which are stacked sequentially along the axial direction of the gear ring positioning ring.

[0008] Preferably, in order to improve the stability and accuracy of the positioning between the spokes, the gear ring, and the wheel core, the positioning element includes a filling sand layer.

[0009] Preferably, in order to improve the stability of the positioning between the spokes, the gear ring, and the wheel core, a magnetic layer is provided on the side of the filling sand layer away from the magnetic turntable, and a surface sand layer is provided on the side of the magnetic layer away from the magnetic turntable.

[0010] Preferably, in order to achieve tight clamping of the filling sand layer and improve the stability of the positioning between the spokes, the gear ring, and the wheel core, the magnetic layer is made of magnetic sand, and the particle size of the magnetic layer particles is larger than that of the filling sand layer particles.

[0011] Preferably, in order to improve the ease of welding between the spokes, the gear ring, and the wheel core, a flip seat is provided on the top surface of the base. One side of the flip seat is a flip edge, and the flip seat can rotate back and forth around the flip edge. The magnetic turntable is rotatably disposed on the side of the flip seat away from the base, and the magnetic turntable is parallel to the flip seat.

[0012] Preferably, in order to weld different sides of the gear body and improve the ease of welding, two flip seats are symmetrically arranged, the flip side is the side of the two flip seats that are close to each other, and a magnetic turntable is provided on the side of the two flip seats that are away from the base.

[0013] Preferably, in order to facilitate rotating the flip seat 4 to a horizontal state, thereby improving the convenience of placing the spokes, wheel core and gear ring on the magnetic turntable, the top surface of the base is provided with a notch, and the flip seat can be placed over the opening of the notch.

[0014] Preferably, in order to achieve automated welding of the gear body and improve the working efficiency of the welding equipment, the welding unit includes a slide rail extending along a direction perpendicular to the flipping edge, the slide rail being horizontally disposed on the side of the base, a movable seat being slidably disposed on the slide rail, and a welding robotic arm being disposed on the movable seat.

[0015] The high-precision welding equipment for welding gears of the present invention has the following advantages: It fixes the gear body by magnetically attracting the gear core, gear ring, and spokes, thus improving the stability of gear fixation; it positions the gear core, gear ring, and spokes by clamping components, improving the accuracy and stability of gear body positioning and enhancing the quality of the finished gear; and it fills the weld seam of the gear body with positioning components, further improving the accuracy and stability of positioning between the gear core, gear ring, and spokes, and further enhancing the quality of the finished gear. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the welding equipment of the present invention; Figure 2 This is a schematic diagram of the connection structure between the welding equipment and the gear body of the present invention; Figure 3 This is a schematic diagram of the notch structure of the present invention; Figure 4 This is a schematic diagram of the connection structure between the magnetic turntable and the clamping member of the present invention; Figure 5 This is a schematic diagram of the gear body of the present invention; Figure 6 This is a schematic diagram of the internal structure of the clamping member of the present invention; Figure 7 This is a schematic diagram of the guide hole structure of the present invention; Figure 8 This is a schematic diagram of the connection structure between the wheel core and the gear ring and the clamping member of the present invention; Figure 9 This is a schematic diagram of the filling structure of the positioning element of the present invention; Figure 10 for Figure 9 Enlarged view of part A; The markings in the diagram are as follows: 1. Gear body; 2. Welding unit; 3. Base; 4. Tilting seat; 5. Magnetic turntable; 6. Clamping component; 101. Wheel core; 102. Wheel spoke; 103. Gear ring; 201. Slide rail; 202. Moving seat; 203. Welding robotic arm; 301. Notch; 401. First hydraulic cylinder; 501. Gear reduction motor; 502. Support shaft; 601. Wheel spoke support plate; 602. Gear ring positioning ring; 603. Abutment block; 604. Wheel core positioning ring; 605. Guide hole; 606. Bolt; 607. Threaded sleeve; 608. Second hydraulic cylinder; 701. Filling sand layer; 702. Magnetic layer; 703. Surface sand layer. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0018] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the welding equipment and are only for the purpose of describing the present invention and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] The structure of existing welded gears is typically as follows: Figure 5 As shown, in its production process, the wheel core 101, wheel assembly 102, and gear ring 103 can be manufactured separately. Then, the wheel core 101 and gear ring 103 are welded and fixed to the spokes 102 to obtain the finished gear. However, during the production process, if the mutual positioning between the wheel core 101, gear ring 103, and spokes 102 is not accurate, it will cause the gear ring 103 of the final finished gear to be misaligned with the wheel core 101, causing the gear ring 103 to run when the gear rotates. This not only increases the failure rate of the equipment but also reduces its service life. Furthermore, if the positioning stability of the wheel core 101, wheel assembly 102, and gear ring 103 is insufficient after positioning, it will cause relative displacement between the wheel core 101, wheel assembly 102, and gear ring 103 during the subsequent welding process, ultimately leading to the problem of misalignment between the gear ring 103 and wheel core 101 in the finished gear.

[0020] To address the above problems, a high-precision welding device for welding gears is proposed, such as... Figures 1-4As shown, the gear body includes a base 3, a welding unit 2 on one side of the base 3, a magnetic turntable 5 horizontally arranged on the top surface of the base 3, and a clamping member 6 on the top surface of the magnetic turntable 5. Both the magnetic turntable 5 and the clamping member 6 are used to fix the gear body 1. The gear body 1 includes a wheel core 101, a gear ring 103, and a wheel spoke 102 arranged between the two. There are welds between the wheel spoke 102 and the gear ring 103 and the wheel core 101. The welds are filled with positioning members. The maximum distance between the positioning members and the top surface of the magnetic turntable 5 is less than the maximum distance between the wheel spoke 102 and the top surface of the magnetic turntable 5.

[0021] When using the aforementioned welding equipment, firstly, the wheel core 101 and gear ring 103 are placed on the top surface of the magnetic turntable 5. The clamping member 6 is positioned between the wheel core 101 and gear ring 103. The clamping member provides clamping force radially towards the wheel core 101 and gear ring 103 respectively, thereby positioning and fixing the wheel core 101 and gear ring 103. Then, the spoke 102 is placed between the wheel core 101 and gear ring 103. The clamping member 6 supports the spoke 102 to a lower height, thus positioning the spoke 102. This completes the positioning and initial fixing of the spoke 102, wheel core 101, and gear ring 103, effectively ensuring the quality of the finished gear after welding. The process of fixing the spoke 102 and wheel core 103 is then completed. Before welding spokes 102, hub 101, and gear ring 103, a malleable positioning element is filled into the weld seam between them and the positioning element is pressed down. This allows the positioning element to further position the relative positions between spokes 102, hub 101, and gear ring 103, and improves the stability of the positioning. The magnetic turntable 5 is equipped with an electromagnet. After the clamping element 6 and the positioning element are fixed, the magnetic turntable 5 is activated to attract spokes 102, hub 101, and gear ring 103, further reinforcing the three components. The combination of these three positioning and reinforcement methods greatly improves the stability of fixing spokes 102, hub 101, and gear ring 103, as well as the accuracy of positioning the relative positions between the three components, thereby improving the quality of the final gear product.

[0022] Compared with existing welding equipment, this welding equipment can fill the weld seam with a plastic positioning element, making it suitable for filling weld seams with smaller gaps. It is also easier to reinforce the weld seam and improve the stability and convenience of positioning the spokes 102, the core 101, and the gear ring 103.

[0023] Further improvements include, for example Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the clamping component 6 includes a wheel core positioning ring 604 and a gear ring positioning ring 602 concentrically arranged on the top surface of the magnetic turntable 5. The top surfaces of the wheel core positioning ring 604 and the gear ring positioning ring 602 are provided with annular spoke support plates 601. The wheel core positioning ring 604 and the gear ring positioning ring 602 are each circumferentially spaced with at least three guide holes 605. The guide holes 605 extend axially along the gear ring positioning ring 602. The guide holes 605 are slidably fitted with abutment blocks 603 along their extension direction. The magnetic turntable 5, the gear ring positioning ring 602, the wheel core positioning ring 604 and the spoke support plate 601 enclose a sealed inner cavity for accommodating the thrust unit. Each abutment block 603 is drivenly connected to the thrust unit.

[0024] In the aforementioned welding equipment, the thrust unit consists of multiple second hydraulic cylinders 608. The number of second hydraulic cylinders 608 is equal to and corresponds one-to-one with the number of abutment blocks 603. The second hydraulic cylinders 608 are arranged radially along the gear ring positioning ring 602 and are used to push each abutment block 603 to move inside the guide hole 605. In use, the gear ring 103 is placed outside the gear ring positioning ring 602, and the wheel core 101 is placed inside the wheel core positioning ring 604. By controlling the synchronous extension and retraction of each second hydraulic cylinder 608, each abutment block 603 moves synchronously. Among them, three abutment blocks 603 connected to the gear ring positioning ring 602 abut against the inner side of the gear ring 103, which can be used for... The position of the gear ring 103 is adjusted and fixed to achieve positioning of the gear ring 103. The other three abutment blocks 603, which are connected to the wheel core positioning ring 604, abut against the outer side of the wheel core 101, thereby adjusting and fixing the position of the wheel core 101. The guide hole 605 can limit and guide the abutment block 603, improve the stability of the abutment block 603, and thus improve the stability of fixing the gear ring 103 and the wheel core 101. The spoke 102 is placed on the spoke support plate 601, which supports the spoke 102, and finally achieves positioning between the wheel core 101, spoke 102 and gear ring 103.

[0025] Further improvements include, for example Figure 4 , Figure 6 , Figure 7 and Figure 8As shown, the spoke support plate 601 is detachably connected to the magnetic turntable 5. Multiple spoke support plates 601 are stacked sequentially along the axial direction of the gear ring positioning ring 602. The assembly and disassembly of the spoke support plates 601 facilitates the maintenance of the second hydraulic cylinder 608, improving the ease of equipment repair. A threaded sleeve 607 is provided on the top surface of the magnetic turntable 5 along the axial direction of the gear ring positioning ring 602. Stepped holes are provided on the spoke support plates 601, and bolts 606 are used to fix the spoke support plates 601 to the threaded sleeve 607, enabling the disassembly of the spoke support plates 601. Simultaneously, by installing different numbers of spoke support plates 601, the height at which the spokes 102 are supported can be adjusted, thereby adjusting the position of the spokes 102 between the wheel core 101 and the gear ring 103, facilitating the installation of spokes 102 of different thicknesses.

[0026] Further improvements include, for example Figure 9 and Figure 10 As shown, the positioning element includes a filling sand layer 701. The filler sand layer 701 is a type of molding sand filler sand. This filler sand has a certain degree of fluidity and plasticity, making it easy to fill the weld seam with small gaps. By filling the weld seam, the positioning between the wheel core 101 and the gear ring 103 and the spokes 102 is achieved, improving the stability of the connection between the wheel core 101, gear ring 103, and spokes 102. After the weld seam on one side of the gear is completed, during the process of flipping the gear to the other side, the filler sand layer 701 reinforces the weld seam, reducing the probability of cracking on the welded side due to the gear's gravity during the flipping process. It also reduces the probability of misalignment between the wheel core 101, gear ring 103, and spokes 102, ensuring the relative positions of the wheel core 101, gear ring 103, and spokes 102 remain stable, thus improving the quality of the finished gear. Furthermore, by filling different amounts of molding sand at different locations in the weld seam, the gap width of the weld seam can be adjusted, thereby adjusting the coaxiality between the spokes 102, gear ring 103, and wheel core 101, further improving the quality of the finished gear.

[0027] The above welding equipment is used as follows: a filler sand layer 701 is filled into the weld seam, then one side of the gear body 1 is welded. After that, the gear body 1 is flipped to the other side, the filler sand layer 701 inside the weld seam is removed, and then the other side of the gear body 1 is welded, thus completing the welding of both sides of the gear body 1. When welding the first side, the filler sand layer 701 plays a role in fixing and positioning. When flipping the gear body 1, the filler sand layer 701 plays a role in supporting and limiting the position, preventing the gear core 101, gear ring 103 and spoke 102 from misaligning when flipping the gear body 1, and ultimately ensuring the quality of the finished gear.

[0028] Further improvements include, for example Figure 9 and Figure 10As shown, a magnetic layer 702 is provided on the side of the filling sand layer 701 away from the magnetic turntable 5, and a surface sand layer 703 is provided on the side of the magnetic layer 702 away from the magnetic turntable 5; the magnetic layer 702 is made of magnetic sand, and the particle size of the magnetic layer 702 particles is larger than the particle size of the filling sand layer 701 particles. When the weld seam of the gear body 1 is small, the filling sand layer 701 inside the weld seam is difficult to compact with tools. Therefore, a magnetic layer 702 is provided on the surface of the filling sand layer 701. Under the action of the magnetic force of the magnetic turntable 5, the magnetic layer 702 can generate extrusion force on the filling sand layer 701, thereby compacting the filling sand layer 701 inside the weld seam. This allows the filling sand layer 701 to provide effective support for the weld seam, improving the positioning and reinforcement effect of the wheel core 101, gear ring 103, and spoke 102. When the gear body 1 is flipped to the other side for welding after welding on one side, the magnetic layer 702 is attracted by the magnetic turntable 5. It also improves the ease of cleaning the magnetic layer 702 inside the weld. At the same time, the force exerted by the magnetic layer 702 on the filling sand layer 702 can loosen the filling sand layer 702 and remove some of it, thus improving the ease of cleaning the filling sand layer 702 and ultimately improving the ease of use of the welding equipment. The surface sand layer 703 set on the side of the magnetic layer 702 away from the magnetic turntable 5 is also a type of molding sand. Its quality is higher than that of the filling sand layer 701. Covering the surface of the magnetic layer 702 with it can protect the magnetic layer 702 and prevent it from being damaged during welding, so as to realize the recycling and reuse of the magnetic layer 702 and reduce production costs.

[0029] Further improvements include, for example Figures 1-3 As shown, a flip seat 4 is provided on the top surface of the base 3. One side of the flip seat 4 is a flip edge, and the flip seat 4 can rotate back and forth around the flip edge. A magnetic turntable 5 is rotatably disposed on the side of the flip seat 4 away from the base 3, and the magnetic turntable 5 is parallel to the flip seat 4. The flip edge of the flip seat 4 is hinged to the base, allowing the flip seat 4 to rotate around the flip edge. A first hydraulic cylinder 401 is hinged between the flip seat 4 and the base 3. The first hydraulic cylinder 401 drives the flip seat 4 to rotate back and forth between the horizontal and vertical directions, realizing the angle adjustment of the flip seat 4. This facilitates the adjustment of the welding angle of the welding unit 2, improving the convenience and welding quality of the welding equipment. A support shaft 502 is provided on one side of the magnetic turntable 5. The support shaft 502 is connected to the flip seat 4 through a bearing. A reduction motor 501 is fixedly connected to the flip seat 4. The reduction motor 501 drives the magnetic turntable 5 to rotate, allowing the magnetic turntable 5 to rotate around its own center, thereby driving the gear body 1 to rotate. This facilitates welding at different positions of the weld and improves welding efficiency.

[0030] A further improvement is that two symmetrical rotating seats 4 are arranged, with the rotating edges being the adjacent sides of the two rotating seats 4. Magnetic turntables 5 are provided on the sides of both rotating seats 4 facing away from the base 3. Both rotating seats 4 are equipped with magnetic turntables 5, and clamping elements 6 are provided on both magnetic turntables 5. After welding one side of the gear body 1 is completed, the first rotating seat 4 is rotated to a vertical position, placing the gear body 1 in a vertical position. Then, the second rotating seat 4 is also rotated to a vertical position. At this time, the two clamping elements 6 can clamp and fix the gear body 1 from both sides. After the magnetic turntables 5 and clamping elements 6 on the second rotating seat 4 have positioned and reinforced the gear body 1, the clamping elements 6 on the first rotating seat 4 are released, and the gear body 1 is fixed. On the second flipping seat 4, the second flipping seat 4 rotates from a vertical state to a horizontal state, realizing the flipping of the gear body 1, so that the weld seam on the other side of the gear body can be welded; when the second flipping seat 4 rotates to the horizontal state, the gear body 1 moves away from the first flipping seat 4. At this time, the magnetic suction turntable 5 of the first flipping seat maintains the magnetic force, so that the magnetic suction layer 702 and part of the filling sand layer 701 inside the weld seam can be sucked out, realizing the recycling of the magnetic suction layer 702, and at the same time facilitating the subsequent cleaning of the magnetic suction layer 702, the filling sand layer 701 and the surface sand layer 703.

[0031] Compared with existing welding equipment, this welding equipment ensures that the gear body 1 is always fixed by the clamping part 6, the magnetic turntable 5 and the positioning part during the flipping process. This prevents the weld on the already welded side from cracking when the gear body 1 is flipped, and also prevents relative displacement between the wheel core 101, the wheel spoke 102 and the gear ring 103 during the flipping process, thereby ensuring the quality of the finished welded gear.

[0032] Further improvements include, for example Figure 3 As shown, a notch 301 is provided on the top surface of the base 3, and the flipping seat 4 can be placed over the opening of the notch 301. The notch is designed to accommodate the geared motor 501 and the first hydraulic cylinder 401, so that the flipping seat 4 can be flipped to a horizontal state, which facilitates fixing the raw materials of the gear 101, spoke 102 and gear ring 103 to the flipping seat 4.

[0033] Further improvements include, for example Figures 1-3 As shown, the welding unit 2 includes a slide rail 201 extending perpendicular to the direction of the flipping edge. The slide rail 201 is horizontally disposed on the side of the base 3. A movable seat 202 is slidably disposed on the slide rail 201, and a welding robotic arm 203 is disposed on the movable seat 202. The movable seat 202 is provided with a drive wheel, which can move along the slide rail 201, thereby realizing the position adjustment of the welding robotic arm 203. The welding robotic arm 203 moves the welding head to automatically weld the weld seam of the gear body 1, improving the automation level of the welding equipment.

[0034] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A high-precision welding device for welding gears, characterized in that, The system includes a base (3), a welding unit (2) on one side of the base (3), a magnetic turntable (5) horizontally arranged on the top surface of the base (3), and a clamping member (6) on the top surface of the magnetic turntable (5). Both the magnetic turntable (5) and the clamping member (6) are used to fix the gear body (1). The gear body (1) includes a wheel core (101), a gear ring (103), and spokes (102) disposed between the two. The spokes (102) are connected to the gear ring (103) and the gear body (103). There are welds between the wheel cores (101), and the welds are filled with positioning elements. The maximum distance between the positioning elements and the top surface of the magnetic turntable (5) is less than the maximum distance between the spokes (102) and the top surface of the magnetic turntable (5). The positioning elements include a filling sand layer (701). A magnetic layer (702) is provided on the side of the filling sand layer (701) away from the magnetic turntable (5), and a surface sand layer (703) is provided on the side of the magnetic layer (702) away from the magnetic turntable (5).

2. The high-precision welding equipment for welding gears according to claim 1, characterized in that, The clamping member (6) includes a wheel core positioning ring (604) and a gear ring positioning ring (602) concentrically arranged on the top surface of the magnetic turntable (5). The top surfaces of the wheel core positioning ring (604) and the gear ring positioning ring (602) are provided with annular spoke support plates (601). The wheel core positioning ring (604) and the gear ring positioning ring (602) are each circumferentially spaced with at least three guide holes (605). The guide holes (605) extend axially along the gear ring positioning ring (602). The guide holes (605) are slidably fitted with abutment blocks (603) along their extension direction. The magnetic turntable (5), the gear ring positioning ring (602), the wheel core positioning ring (604), and the spoke support plate (601) enclose a sealed inner cavity for accommodating the thrust unit. Each abutment block (603) is connected to the thrust unit in a transmission manner.

3. The high-precision welding equipment for welding gears according to claim 2, characterized in that, The spoke support plate (601) is detachably connected to the magnetic turntable (5). There are multiple spoke support plates (601), and each spoke support plate (601) is stacked sequentially along the axial direction of the toothed ring positioning ring (602).

4. The high-precision welding equipment for welding gears according to claim 1, characterized in that, The magnetic layer (702) is made of magnetic sand, and the particle size of the magnetic layer (702) particles is larger than that of the filling sand layer (701) particles.

5. The high-precision welding equipment for welding gears according to any one of claims 1-4, characterized in that, The top surface of the base (3) is provided with a flip seat (4), one side of the flip seat (4) is a flip edge, the flip seat (4) can rotate back and forth around the flip edge, the magnetic turntable (5) is rotatably disposed on the side of the flip seat (4) away from the base (3), and the magnetic turntable (5) and the flip seat (4) are parallel to each other.

6. The high-precision welding equipment for welding gears according to claim 5, characterized in that, Two flip seats (4) are symmetrically arranged. The flipping edge is the side of the two flip seats (4) that are close to each other. The two flip seats (4) are provided with magnetic turntables (5) on the side facing away from the base (3).

7. The high-precision welding equipment for welding gears according to claim 6, characterized in that, The base (3) has a notch (301) on its top surface, and the flip seat (4) can cover the opening of the notch (301).

8. The high-precision welding equipment for welding gears according to claim 6, characterized in that, The welding unit (2) includes a slide rail (201) extending in a direction perpendicular to the flipped edge. The slide rail (201) is horizontally arranged on the side of the base (3). The slide rail (201) is slidably provided with a movable seat (202), and the movable seat (202) is provided with a welding robot arm (203).

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