Welding device and method for pump valve casting

Abstract

The invention discloses a welding device and method for a pump valve casting, and particularly relates to the technical field of welding. The welding device comprises a workbench, a support is arranged in the middle of the workbench, a movable welding assembly is arranged in the support, a guide rail is arranged on the workbench, and an electric sliding table is slidably arranged in the guide rail; and the electric sliding table is connected with a moving seat. By arranging the electric sliding table, the moving seat, the clamping plate, the contact plate, the electric heating plate and the extrusion plate, in the process that the electric sliding table controls the moving seat to move, the extrusion plate extrudes the contact plate and the clamping plate, the clamping plate automatically clamps and positions a part, the electric heating plate preheats the part before welding, heat preservation treatment is conducted on the part after welding, and the welding quality is improved. The large temperature difference condition in the part welding process is avoided, welding stress and cracks are reduced to a certain degree, it is guaranteed that the part is kept stable in the welding process, and the welding feeding and discharging process of the part is simple and convenient.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and more particularly to a welding device and method for pump valve castings. Background Art

[0002] Pump and valve castings require welding operations during the processing process. The existing welding is mostly done directly with a welding machine. There is a large temperature difference between the casting before and during welding, and the rapid cooling after welding will cause large welding stress in the weld of the casting, and even cracks. If it is directly removed manually after welding, it may be scratched or burned by the rough part of the weld. Therefore, a welding device and method for pump and valve castings are needed to solve the above problems. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a welding device and method for pump valve castings. The technical problem to be solved by the present invention is: in the casting welding operation, there is a large temperature difference between the welding process and before and after welding, which may cause more welding stress and cracks, and the welding slag and oxide scale at the weld after welding are not beautiful enough, and may even scratch the hands.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding device for pump valve castings, comprising a workbench, a bracket is provided in the middle position of the workbench, a movable welding assembly is provided in the bracket, a guide rail is provided on the workbench, an electric slide is provided for sliding in the guide rail, a movable seat is connected to the electric slide, both sides of the movable seat are penetrated by movable limit assemblies, an electric heating plate is provided on the movable seat, a fixing rod is connected to the workbench, an extrusion plate is connected to the top of the fixing rod, a sliding groove is provided on the side of the extrusion plate, and a guide groove is provided on the extrusion plate. A sliding connection device is slidably provided in the sliding groove, and the other end of the sliding connection device is connected to a moving frame, and a transmission device is connected to the moving frame. A tooth plate is provided on the side of the transmission device, and an intermediate rod is connected to the side of the tooth plate close to the bracket, and the other end of the intermediate rod is connected to the bracket. A rotating grinding component is penetrated through the transmission device, and the rotating grinding component is penetrated through the moving frame. Two limiting devices located in the transmission device are penetrated through the rotating grinding component, and a connecting groove is opened under the moving frame, and a movable contact device located in the guide groove is slidably provided in the connecting groove.

[0005] As a further solution of the present invention: a support leg is connected under the workbench, the guide groove consists of a straight section and an inclined section, both ends of the extrusion plate are inclined, and a push plate is connected to the position of the movable seat corresponding to the movable contact device.

[0006] As a further solution of the present invention: the movable limiting assembly includes a contact plate, the position of the contact plate corresponds to the position of the extrusion plate, and the side of the contact plate close to the movable seat is connected to a cross bar, which penetrates and is slidably arranged on the side of the movable seat.

[0007] As a further solution of the present invention: one end of the cross bar located inside the moving seat is connected to a splint, the outer sleeve of the cross bar is provided with a first elastic component, one end of the first elastic component is connected to the contact plate, the other end of the first elastic component is connected to the moving seat, and the splint is slidably arranged in the moving seat.

[0008] As a further solution of the present invention: the sliding connection device includes a sliding block, the sliding block is arranged in a sliding groove, the sliding block is set to a rectangle, the side of the sliding block located in the sliding groove is connected to a second elastic component, the other end of the second elastic component is connected to the inner wall of the sliding groove, the side of the sliding block is connected to a first connecting rod, the other end of the first connecting rod is connected to the movable frame, and the first connecting rod is located at the lower side of the tooth plate.

[0009] As a further solution of the present invention: the transmission device includes a first transmission wheel and a second transmission wheel, the second transmission wheel is provided with a limiting groove, the limiting device is arranged in the limiting groove, the first transmission wheel and the second transmission wheel are externally connected by a belt, the second transmission wheel is arranged outside the rotating grinding assembly, the axial position under the first transmission wheel is connected to a rotating shaft, the rotating shaft outer sleeve is provided with a first bearing arranged on the movable frame, and the rotating shaft is provided with a gear meshing with a toothed plate outside.

[0010] As a further solution of the present invention: the rotating grinding assembly includes a threaded barrel, the threaded barrel is arranged in the transmission device, the threaded barrel is threadedly connected to a screw rod, the two ends of the screw rod are respectively connected to a grinding disc and a rotating seat, the limiting device is arranged on the rotating seat, the outer sleeve of the threaded barrel is provided with a second bearing, and the second bearing is penetrated and arranged on the movable seat.

[0011] As a further solution of the present invention: the limiting device includes a guide sleeve, the guide sleeve is penetrated by the rotating grinding assembly, a limiting rod is slidably provided in the guide sleeve, the limiting rod is located in the transmission device, a third elastic component is provided outside the limiting rod, and the other end of the third elastic component is connected to the guide sleeve.

[0012] As a further solution of the present invention: the movable contact device includes a guide connecting block slidably arranged in a connecting groove, a baffle is connected under the guide connecting block, the position of the baffle corresponds to the position of the push plate, and a second connecting rod is connected to the side of the baffle, and the second connecting rod is slidably arranged in the guide groove.

[0013] A method for using a welding device for a pump valve casting, the method comprising the following steps:

[0014] First, put the parts to be welded on the movable seat, and preheat the parts with the electric heating plate. Then, pull the limit rod upward to separate from the limit slot. Then, control the rotation of the rotating seat and the screw according to the size of the parts. While the screw rotates, control the grinding disc to move downward to the corresponding height. Then, release the limit rod. The third elastic component controls the limit rod to move downward into the limit slot. Then, control the electric slide to control the movement of the movable seat. At this time, the contact plate is squeezed and moved by the squeezing plate. The cross bar and the clamping plate move to complete the clamping and positioning of the parts. When the parts move to the position corresponding to the movable welding assembly, the electric slide stops working. At this time, the movable welding assembly performs welding on the parts.

[0015] When welding is completed, the electric slide continues to work, and when the push plate contacts the baffle, the baffle and the movable frame are pushed, and the moving gear is blocked by the toothed plate at the same time, so that the gear controls the rotation of the first transmission wheel, and the first transmission wheel controls the rotation of the second transmission wheel, the threaded barrel screw and the grinding disk through the belt. At this time, the grinding disk grinds the surface of the welded component. When the second connecting rod moves to the inclined section of the guide groove, the second connecting rod and the baffle are pulled and separated from the push plate, and then the second elastic component controls the sliding block and the movable frame to reset, and the contact plate is separated from the extrusion plate, and the first elastic component controls the movement of the cross bar and the clamping plate, and the clamping plate releases the clamping limit on the component.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention is provided with an electric slide, a moving seat, a clamping plate, a contact plate, an electric heating plate, and an extrusion plate. When the electric slide controls the moving seat to move, the extrusion plate squeezes the contact plate and the clamping plate, so that the clamping plate automatically clamps and positions the components. The electric heating plate preheats the components before welding, and performs heat preservation treatment on the components after welding, so as to avoid a large temperature difference during the welding process of the components, reduce welding stress and cracks to a certain extent, and ensure that the components remain stable during the welding process. The welding loading and unloading process of the components is simple and convenient.

[0018] 2. The present invention sets a push plate, a baffle, a gear, a toothed plate, a grinding disc, a second connecting rod, a first connecting rod and a second elastic component. During the movement of the movable seat, the push plate controls the movement of the baffle to control the movement of the movable frame along with the component. The toothed plate controls the rotation of the movable gear to control the rotation of the grinding disc. The grinding disc grinds the weld position on the surface of the component after welding. At the same time, the rotation process of the screw rod can control the height change of the grinding disc. It has better flexibility and can automatically complete the processing of the weld during the unloading process after the component is welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the mobile seat of the present invention;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the extruded plate of the present invention;

[0022] Figure 4 It is a schematic diagram of a partial three-dimensional structure of an extruded plate of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the mobile frame of the present invention when viewed from above;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the sliding connection device of the present invention;

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the transmission device of the present invention;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the second transmission wheel of the present invention;

[0027] Fig. 9 It is a three-dimensional structural schematic diagram of the limiting device of the present invention;

[0028] Fig.10 It is a three-dimensional structural schematic diagram of the movable contact device of the present invention;

[0029] In the figure: 1, workbench; 2, bracket; 3, movable welding assembly; 4, support leg; 5, guide rail; 6, electric slide; 7, moving seat; 8, electric heating plate; 9, moving limit assembly; 91, contact plate; 92, cross bar; 93, clamping plate; 94, first elastic assembly; 10, push plate; 11, extrusion plate; 12, fixed rod; 13, sliding groove; 14, guide groove; 15, sliding connection device; 151, sliding block; 152, second elastic assembly; 153, first connecting rod; 16, moving frame; 17, transmission device; 171, first transmission wheel; 1 72. second transmission wheel; 173. belt; 174. rotating shaft; 175. gear; 176. first bearing; 177. limiting groove; 18. tooth plate; 19. intermediate rod; 20. rotating grinding assembly; 201. threaded cylinder; 202. screw rod; 203. grinding disc; 204. rotating seat; 205. second bearing; 21. limiting device; 211. guide sleeve; 212. limiting rod; 213. third elastic assembly; 22. connecting groove; 23. movable contact device; 231. guide connecting block; 232. baffle; 233. second connecting rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-10 As shown, the present invention provides a welding device for pump valve castings, including a workbench 1, a bracket 2 is provided at the middle position of the workbench 1, a movable welding assembly 3 is provided in the bracket 2, a guide rail 5 is provided on the workbench 1, an electric slide 6 is slidably provided in the guide rail 5, a moving seat 7 is connected to the electric slide 6, both sides of the moving seat 7 are penetrated with a moving limit assembly 9, an electric heating plate 8 is provided on the moving seat 7, a fixing rod 12 is connected to the workbench 1, a top end of the fixing rod 12 is connected to an extrusion plate 11, a sliding groove 13 is provided on the side of the extrusion plate 11, a guide groove 14 is provided on the extrusion plate 11, and a sliding connection is slidably provided in the sliding groove 13 Device 15, the other end of the sliding connection device 15 is connected to a moving frame 16, the moving frame 16 is connected to a transmission device 17, a tooth plate 18 is provided on the side of the transmission device 17, the tooth plate 18 is connected to an intermediate rod 19 on the side close to the bracket 2, the other end of the intermediate rod 19 is connected to the bracket 2, a rotating grinding assembly 20 is penetrated on the transmission device 17, the rotating grinding assembly 20 is penetrated on the moving frame 16, two limiting devices 21 located in the transmission device 17 are penetrated on the rotating grinding assembly 20, a connecting groove 22 is opened under the moving frame 16, and a movable contact device 23 located in the guide groove 14 is slidably provided in the connecting groove 22.

[0032] The movable welding assembly 3 can be used to perform horizontal movements to achieve the welding operation of the components; the electric slide 6 and the guide rail 5 are used to control the horizontal movement of the movable seat 7, which is convenient for the loading and unloading process of the component welding process;

[0033] The workbench 1 is connected to a supporting leg 4 , the guide groove 14 is composed of a straight section and an inclined section, the two ends of the extrusion plate 11 are inclined, and the position of the movable seat 7 corresponding to the movable contact device 23 is connected to a push plate 10 .

[0034] The movable limiting assembly 9 includes a contact plate 91 , the position of the contact plate 91 corresponds to the position of the extrusion plate 11 , and a cross bar 92 is connected to one side of the contact plate 91 close to the movable seat 7 , and the cross bar 92 penetrates and is slidably arranged on the side of the movable seat 7 .

[0035] The contact plate 91 and the extrusion plate 11 cooperate with each other, and the contact plate 91 is pushed by the extrusion plate 11 to move during the movement, so as to realize the horizontal movement of the control crossbar 92 and the clamping plate 93;

[0036] One end of the cross bar 92 located inside the moving seat 7 is connected to a clamping plate 93, and a first elastic component 94 is provided on the outer sleeve of the cross bar 92. One end of the first elastic component 94 is connected to the contact plate 91, and the other end of the first elastic component 94 is connected to the moving seat 7. The clamping plate 93 is slidably arranged in the moving seat 7.

[0037] The clamping plate 93 is used to clamp and position the component, and the first elastic component 94 can be used to control the clamping plate 93 to reset after the extrusion plate 11 is separated from the contact plate 91, thereby releasing the clamping limit of the component;

[0038] The sliding connection device 15 includes a sliding block 151, which is arranged in the sliding groove 13. The sliding block 151 is set to a rectangle. The side of the sliding block 151 located in the sliding groove 13 is connected to a second elastic component 152, and the other end of the second elastic component 152 is connected to the inner wall of the sliding groove 13. The side of the sliding block 151 is connected to a first connecting rod 153, and the other end of the first connecting rod 153 is connected to the movable frame 16. The first connecting rod 153 is located at the lower side of the tooth plate 18.

[0039] The sliding block 151 cooperates with the sliding groove 13 to enable the movable frame 16 to move linearly in the horizontal direction. The second elastic component 152 is used to control the movable frame 16 and the sliding block 151 to automatically reset when the movable frame 16 is not hindered by the outside.

[0040] The transmission device 17 includes a first transmission wheel 171 and a second transmission wheel 172. The second transmission wheel 172 is provided with a limiting groove 177. The limiting device 21 is arranged in the limiting groove 177. The first transmission wheel 171 and the second transmission wheel 172 are externally connected by a belt 173. The second transmission wheel 172 is arranged outside the rotating grinding assembly 20. The axis position under the first transmission wheel 171 is connected to a rotating shaft 174. The rotating shaft 174 is outer-mounted with a first bearing 176 arranged on the movable frame 16, and the rotating shaft 174 is externally provided with a gear 175 meshing with the toothed plate 18.

[0041] The gear 175 and the toothed plate 18 are used. When the gear 175 moves with the moving frame 16, the toothed plate 18 will prevent the gear 175 from rotating, so that the rotation of the gear 175 and the first transmission wheel 171 is automatically controlled. The first bearing 176 is used to limit the rotation of the rotating shaft 174 and the gear 175, so that the gear 175 can rotate stably. The first transmission wheel 171, the belt 173 and the second transmission wheel 172 are used. The first transmission wheel 171 can control the second transmission wheel 172 to rotate through the belt 173;

[0042] The rotating grinding assembly 20 includes a threaded barrel 201, which is arranged in the transmission device 17. The threaded barrel 201 is threadedly connected to a screw rod 202. The two ends of the screw rod 202 are respectively connected to a grinding disc 203 and a rotating seat 204. The limiting device 21 is arranged on the rotating seat 204. The outer sleeve of the threaded barrel 201 is provided with a second bearing 205, and the second bearing 205 is penetrated and arranged on the movable seat 7.

[0043] The second bearing 205 is used to limit and support the threaded barrel 201, so as to ensure that the threaded barrel 201 and the second transmission wheel 172 can rotate smoothly. The threaded barrel 201 and the screw rod 202 are matched, and when the screw rod 202 rotates, the grinding disc 203 can be controlled to move in the vertical direction, so as to perform grinding operations on components of different heights.

[0044] The limiting device 21 includes a guide sleeve 211, which is arranged on the rotating grinding assembly 20. A limiting rod 212 is slidably arranged in the guide sleeve 211. The limiting rod 212 is located in the transmission device 17. A third elastic component 213 is arranged on the outer sleeve of the limiting rod 212. The other end of the third elastic component 213 is connected to the guide sleeve 211.

[0045] A guide sleeve 211 is used to limit and guide the limit rod 212 to ensure that the limit rod 212 can slide stably in the vertical direction. The limit rod 212 and the limit groove 177 are used to limit the rotating seat 204 to prevent the screw rod 202 from rotating randomly and ensure that the second transmission wheel 172 can control the threaded cylinder 201, the screw rod 202 and the grinding disc 203 to rotate synchronously. The third elastic component 213 applies a downward force to the limit rod 212 to ensure stable contact between the limit rod 212 and the limit groove 177.

[0046] The movable contact device 23 includes a guide connection block 231 slidably arranged in the connection groove 22, a baffle 232 is connected under the guide connection block 231, the position of the baffle 232 corresponds to the position of the push plate 10, and a second connecting rod 233 is connected to the side of the baffle 232, and the second connecting rod 233 is slidably arranged in the guide groove 14.

[0047] A second connecting rod 233 and a guide groove 14 are used, and the guide groove 14 guides the movable second connecting rod 233, so that the baffle 232 can be smoothly controlled to separate from the push plate 10, so that the movable seat 7 can pass over the movable frame 16 conveniently. A guiding connecting block 231 and a connecting groove 22 are used, and the connecting groove 22 guides the guiding connecting block 231, so that the guiding connecting block 231 and the second connecting rod 233 can perform stable movements relative to the movable frame 16.

[0048] A method for using a welding device for pump valve castings, the method comprising the following steps:

[0049] First, the parts to be welded are placed on the movable seat 7, and the electric heating plate 8 is operated to preheat the parts. Then, the limiting rod 212 is pulled upward to separate from the limiting groove 177. Then, the rotating seat 204 and the screw rod 202 are controlled to rotate according to the size of the parts. While the screw rod 202 rotates, the grinding disc 203 is controlled to move downward to the corresponding height. Then, the limiting rod 212 is released, and the third elastic component 213 controls the limiting rod 212 to move downward into the limiting groove 177. Then, the electric slide 6 is controlled to operate and control the movable seat 7 to move. At this time, the contact plate 91 is squeezed and moved by the squeezing plate 11, and the cross bar 92 and the clamping plate 93 move to complete the clamping and positioning of the parts. When the parts move to the position corresponding to the movable welding assembly 3, the electric slide 6 stops working. At this time, the movable welding assembly 3 performs welding processing on the parts.

[0050] When welding is completed, the electric slide 6 continues to work, and when the push plate 10 contacts the baffle 232, the baffle 232 and the movable frame 16 are pushed, and the moving gear 175 is blocked by the tooth plate 18, so that the gear 175 controls the first transmission wheel 171 to rotate, and the first transmission wheel 171 controls the second transmission wheel 172, the threaded barrel 201, the screw 202 and the grinding disk 203 to rotate through the belt 173. At this time, the grinding disk 203 grinds the surface of the welded component. When the second connecting rod 233 moves to the inclined section of the guide groove 14, the second connecting rod 233 and the baffle 232 are pulled and separated from the push plate 10, and then the second elastic component 152 controls the sliding block 151 and the movable frame 16 to reset, and the contact plate 91 is separated from the extrusion plate 11, and the first elastic component 94 controls the cross bar 92 and the clamping plate 93 to move, and the clamping plate 93 releases the clamping limit on the component.

[0051] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

Claims

1. A welding device for pump and valve castings, comprising a workbench (1), characterized in that: A bracket (2) is provided in the middle of the workbench (1), a movable welding assembly (3) is provided in the bracket (2), a guide rail (5) is provided on the workbench (1), an electric slide (6) is slidably provided in the guide rail (5), a movable seat (7) is connected to the electric slide (6), both sides of the movable seat (7) are penetrated by movable limit assemblies (9), an electric heating plate (8) is provided on the movable seat (7), a fixed rod (12) is connected to the workbench (1), the top end of the fixed rod (12) is connected to an extrusion plate (11), a sliding groove (13) is provided on the side of the extrusion plate (11), a guide groove (14) is provided on the extrusion plate (11), a sliding connection device (15) is slidably provided in the sliding groove (13), and the sliding connection device The other end of the frame (15) is connected to a movable frame (16), the movable frame (16) is connected to a transmission device (17), a tooth plate (18) is provided on the side of the transmission device (17), a side of the tooth plate (18) close to the bracket (2) is connected to an intermediate rod (19), the other end of the intermediate rod (19) is connected to the bracket (2), a rotary grinding assembly (20) is provided through the transmission device (17), the rotary grinding assembly (20) is provided through the movable frame (16), two limit devices (21) located in the transmission device (17) are provided through the rotary grinding assembly (20), a connecting groove (22) is provided below the movable frame (16), a movable contact device (23) located in the guide groove (14) is slidably provided in the connecting groove (22).

2. A welding device for pump and valve castings according to claim 1, characterized in that: A support leg (4) is connected below the workbench (1); the guide groove (14) is composed of a straight section and an inclined section; both ends of the extrusion plate (11) are inclined; and a push plate (10) is connected to a position on the movable seat (7) corresponding to the movable contact device (23).

3. A welding device for pump and valve castings according to claim 1, characterized in that: The movable limiting assembly (9) comprises a contact plate (91), the position of the contact plate (91) corresponds to the position of the extrusion plate (11), and a side of the contact plate (91) close to the movable seat (7) is connected to a cross bar (92), and the cross bar (92) penetrates and is slidably arranged on the side of the movable seat (7).

4. A welding device for pump and valve castings according to claim 3, characterized in that: One end of the cross bar (92) located inside the movable seat (7) is connected to a clamping plate (93), and a first elastic component (94) is provided on the outer sleeve of the cross bar (92). One end of the first elastic component (94) is connected to the contact plate (91), and the other end of the first elastic component (94) is connected to the movable seat (7). The clamping plate (93) is slidably arranged in the movable seat (7).

5. A welding device for pump and valve castings according to claim 1, characterized in that: The sliding connection device (15) comprises a sliding block (151), wherein the sliding block (151) is arranged in the sliding groove (13), and the sliding block (151) is set to be rectangular. The side of the sliding block (151) located in the sliding groove (13) is connected to a second elastic component (152), and the other end of the second elastic component (152) is connected to the inner wall of the sliding groove (13). The side of the sliding block (151) is connected to a first connecting rod (153), and the other end of the first connecting rod (153) is connected to the moving frame (16). The first connecting rod (153) is located at the lower side of the tooth plate (18).

6. A welding device for pump and valve castings according to claim 1, characterized in that: The transmission device (17) comprises a first transmission wheel (171) and a second transmission wheel (172); a limiting groove (177) is provided on the second transmission wheel (172); the limiting device (21) is arranged in the limiting groove (177); the first transmission wheel (171) and the second transmission wheel (172) are externally connected by a belt (173); the second transmission wheel (172) is arranged outside the rotating grinding assembly (20); a rotating shaft (174) is connected to the axis center position under the first transmission wheel (171); a first bearing (176) arranged on the moving frame (16) is provided on the outer sleeve of the rotating shaft (174); and a gear (175) meshing with the toothed plate (18) is provided on the outside of the rotating shaft (174).

7. A welding device for pump and valve castings according to claim 1, characterized in that: The rotary grinding assembly (20) comprises a threaded barrel (201), the threaded barrel (201) is arranged in the transmission device (17), the threaded barrel (201) is internally threadedly connected to a screw rod (202), the two ends of the screw rod (202) are respectively connected to a grinding disc (203) and a rotating seat (204), the limiting device (21) is arranged on the rotating seat (204), the outer sleeve of the threaded barrel (201) is provided with a second bearing (205), and the second bearing (205) is arranged through the movable seat (7).

8. A welding device for pump and valve castings according to claim 1, characterized in that: The limiting device (21) comprises a guide sleeve (211), the guide sleeve (211) is arranged on the rotating grinding assembly (20), a limiting rod (212) is slidably arranged in the guide sleeve (211), the limiting rod (212) is located in the transmission device (17), a third elastic component (213) is arranged on the outer sleeve of the limiting rod (212), and the other end of the third elastic component (213) is connected to the guide sleeve (211).

9. A welding device for pump and valve castings according to claim 1, characterized in that: The movable contact device (23) comprises a guide connection block (231) slidably arranged in the connection groove (22), a baffle plate (232) is connected below the guide connection block (231), the position of the baffle plate (232) corresponds to the position of the push plate (10), and a second connection rod (233) is connected to the side of the baffle plate (232), and the second connection rod (233) is slidably arranged in the guide groove (14).

10. A welding device for pump and valve castings according to any one of claims 1 to 9, wherein the method for using the welding device is characterized in that: The method of use comprises the following steps: First, the component to be welded is placed on the movable seat (7), and the electric heating plate (8) is operated to preheat the component. Then, the limit rod (212) is pulled upward to separate from the limit groove (177). Then, the rotating seat (204) and the screw rod (202) are controlled to rotate according to the size of the component. While the screw rod (202) rotates, the grinding disc (203) is controlled to move downward to a corresponding height. Then, the limit rod (212) is released. The third elastic component (213) controls the limit rod (212) to move downward into the limit groove (177). Then, the electric slide (6) is controlled to operate to control the movement of the movable seat (7). At this time, the contact plate (91) is squeezed and moved by the squeezing plate (11), and the cross bar (92) and the clamping plate (93) move to complete the clamping and positioning of the component. When the component moves to the position corresponding to the movable welding component (3), the electric slide (6) stops working. At this time, the movable welding component (3) performs welding processing on the component. When welding is completed, the electric slide (6) continues to work. When the push plate (10) contacts the baffle (232), the baffle (232) and the moving frame (16) are pushed, and the moving gear (175) is blocked by the toothed plate (18), so that the gear (175) controls the first transmission wheel (171) to rotate. The first transmission wheel (171) controls the second transmission wheel (172), the threaded barrel (201), the screw rod (202) and the grinding disc (203) to rotate through the belt (173). At this time, the grinding disc (203) The surface of the welded component is ground. When the second connecting rod (233) moves to the inclined section of the guide groove (14), the second connecting rod (233) and the baffle (232) are pulled and separated from the push plate (10). Then, the second elastic component (152) controls the sliding block (151) and the movable frame (16) to reset, and the contact plate (91) is separated from the extrusion plate (11). The first elastic component (94) controls the movement of the cross bar (92) and the clamping plate (93), and the clamping plate (93) releases the clamping limit on the component.

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