Straight welding seam grinding machine

Abstract

The utility model discloses a straight welding seam grinding machine which comprises a machine base, a workpiece clamp, a grinding device and an alignment device. The workpiece clamp comprises a lower explorator, a left pressing plate, a right pressing plate and a clamping driving mechanism, the left pressing plate and the right pressing plate are arranged on the left side and the right side of the lower explorator respectively, a workpiece welding seam exposure area extending in the front-back direction is formed between the left pressing plate and the right pressing plate, and the clamping driving mechanism is used for driving the left pressing plate and the right pressing plate to act so as to clamp and loosen a workpiece. The grinding device comprises a grinding assembly and a front-back driver, the grinding assembly is provided with a grinding part, the front-back driver is used for driving the grinding assembly to move front and back, and the grinding part can move on the upper side of the workpiece weld joint exposed area. The alignment device is configured to project an alignment line which extends in the front-back direction and is aligned with the position where the polishing part polishes the workpiece to the workpiece weld joint exposed area. The straight welding seam grinding machine can be better aligned with a straight welding seam of a workpiece, and the grinding quality can be improved.

Description

Technical Field

[0001] The utility model relates to grinding equipment, in particular to a straight weld grinding machine. Background Art

[0002] Some thin shell components, such as tube shells, have straight welds that need to be smoothed, typically using a grinder. Since straight welds are long, misalignment can lead to poor grinding quality and increased wear on the non-ground areas of the workpiece. Existing grinders for straight welds rely solely on simple pointers for alignment, resulting in poor alignment and limited polishing quality. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a straight weld seam grinder that can better align the straight weld seam of a workpiece, thereby improving the grinding quality.

[0004] According to the straight weld grinder of the embodiment of the present utility model, it includes: a machine base; a workpiece clamp, which is arranged on the machine base, and the workpiece clamp includes a lower mold, a left pressure plate, a right pressure plate and a clamping drive mechanism, the left pressure plate and the right pressure plate are respectively arranged on the left and right sides of the lower mold, and a workpiece clamping position is formed between the left pressure plate and the upper left end of the lower mold, and between the right pressure plate and the upper right end of the lower mold, respectively, and a workpiece weld exposed area extending in the front-to-back direction is formed between the left pressure plate and the right pressure plate. The clamping drive mechanism is used to drive the left pressure plate and the right pressure plate to clamp and release the workpiece; the grinding device is arranged on the machine base, and the grinding device includes a grinding assembly and front and rear drivers. The grinding assembly is provided with a grinding part, and the front and rear drivers are used to drive the grinding assembly to move forward and backward, and the grinding part can move on the upper side of the exposed area of the workpiece weld; the alignment device is configured to project an alignment line extending in the front-to-back direction to the exposed area of the workpiece weld and aligned with the position of the grinding part grinding the workpiece.

[0005] According to an embodiment of the present invention, a straight weld seam grinding machine has at least the following beneficial effects: an alignment line is projected onto the exposed weld seam area of a workpiece between the left and right pressure plates by an alignment device, the portion of the workpiece having the straight weld seam is pressed against the lower backing plate, the position of the workpiece is adjusted so that the straight weld seam and the alignment line are aligned, and a clamping drive mechanism drives the left and right pressure plates to move and clamp the two sides of the straight weld seam with the lower backing plate, thereby securing the workpiece. The straight weld seam of the workpiece is exposed through the exposed weld seam area of the workpiece, and the straight weld seam of the workpiece is aligned with the position of the grinding unit for grinding the workpiece. When grinding the workpiece, the grinding assembly is driven forward and backward by the front and rear drives, and the grinding assembly grinds the straight weld seam of the workpiece in a front-to-back direction through the grinding unit. The straight weld grinding machine of the present invention utilizes a clamping structure of the lower backing plate, the left and right pressure plates, and uses an alignment line projected onto the exposed weld seam area of the workpiece to align the straight weld seam, resulting in good alignment and stable clamping, which is conducive to improving the grinding quality.

[0006] According to some embodiments of the present invention, the alignment device is a light emitter, which is connected to the grinding assembly and is located above the position where the grinding part grinds the workpiece.

[0007] According to some embodiments of the present invention, the position of the alignment device relative to the grinding assembly is adjustable.

[0008] According to some embodiments of the present invention, the alignment device is connected to the grinding assembly via a flexible strip.

[0009] According to some embodiments of the present invention, the grinding assembly includes a component seat, an up and down movable seat, an up and down drive, a main motor, a driving wheel and a driven wheel. The component seat is movably arranged on the machine base front and back, the front and back drives are used to drive the component seat to move back and forth, the up and down movable seat is movably arranged on the component seat up and down, the up and down drive is arranged between the component seat and the up and down movable seat and is used to drive the up and down movable seat to move up and down, the main motor is arranged on the up and down movable seat, the driving wheel is connected to the output shaft of the main motor, the driven wheel is arranged on the up and down movable seat, the grinding part is a sanding belt, and the sanding belt is tensioned on the driving wheel and the driven wheel.

[0010] According to some embodiments of the present invention, the up and down movable seat is provided with a tensioning driver for driving the driven wheel to move in a direction away from and close to the driving wheel.

[0011] According to some embodiments of the present invention, the front and rear drivers include a servo motor and a linkage mechanism, and the output shaft of the servo motor drives the grinding assembly to move forward and backward through the linkage mechanism.

[0012] According to some embodiments of the present invention, the grinding assembly includes a component seat, which is movably arranged on the machine base forward and backward, and the front and rear drives are used to drive the component seat to move forward and backward. The component seat includes a base and an upper and lower adjustment seat, and the grinding part is connected to the upper and lower adjustment seats. A compensation drive is provided between the base and the upper and lower adjustment seats for adjusting the upper and lower positions of the upper and lower adjustment seats relative to the base.

[0013] According to some embodiments of the present invention, the clamping drive mechanism includes a left lever, a right lever, a left-side driver and a right-side driver, the left lever and the right lever are respectively arranged on the left and right sides of the lower mold and arranged along the left and right directions, the position between the left and right ends of the left lever and the right lever is hinged to the machine base, the left-side driver is arranged on the machine base and connected to the left end of the left lever, the left-side driver is used to drive the left end of the left lever to move up and down, the left pressure plate is connected to the right end of the left lever, the right-side driver is arranged on the machine base and connected to the right end of the right lever, the right-side driver is used to drive the right end of the right lever to move up and down, and the right pressure plate is connected to the left end of the right lever.

[0014] According to some embodiments of the present invention, the left and right positions of the left pressure plate and the right pressure plate are adjustable respectively.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 A three-dimensional schematic diagram of an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A magnified schematic diagram of point A;

[0019] Figure 3 This is a three-dimensional schematic diagram of a grinding device according to an embodiment of the present utility model;

[0020] Figure 4 It is a schematic diagram of the local structure of an embodiment of the present utility model.

[0021] Reference numerals:

[0022] Machine base 100;

[0023] Workpiece fixture 200, lower backing die 210, left pressure plate 220, right pressure plate 230, clamping drive mechanism 240, left lever 241, right lever 242, left driver 243, right driver 244;

[0024] Grinding device 300, grinding assembly 310, front and rear drivers 320, assembly base 311, vertical movable base 312, vertical driver 313, main motor 314, driving wheel 315, driven wheel 316, tensioning driver 317, servo motor 321, base 3111, vertical adjustment base 3112, compensation driver 318;

[0025] Alignment device 400 , flexible strip 410 . DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figures 1 to 4The straight weld grinding machine includes: a machine base 100, a workpiece fixture 200, a grinding device 300 and an alignment device 400. The workpiece fixture 200 is arranged on the machine base 100, and the workpiece fixture 200 includes a lower backing mold 210, a left pressure plate 220, a right pressure plate 230 and a clamping drive mechanism 240. The left pressure plate 220 and the right pressure plate 230 are respectively arranged on the left and right sides of the lower backing mold 210. Workpiece clamping positions are formed between the left pressure plate 220 and the upper left end of the lower backing mold 210, and between the right pressure plate 230 and the upper right end of the lower backing mold 210. A workpiece weld exposure area extending in the front-to-back direction is formed between the left pressure plate 220 and the right pressure plate 230. The clamping drive mechanism 240 is used to drive the left pressure plate 220 and the right pressure plate 230 to clamp and release the workpiece. The grinding device 300 is mounted on the machine base 100 and includes a grinding assembly 310 and a front and rear actuator 320. The grinding assembly 310 includes a grinding unit, and the front and rear actuator 320 is used to drive the grinding assembly 310 to move forward and backward. The grinding unit can move above the exposed weld area of the workpiece. The alignment device 400 is configured to project an alignment line extending in the front-to-back direction onto the exposed weld area of the workpiece, aligned with the position of the grinding unit grinding the workpiece.

[0031] The alignment line is projected onto the exposed weld seam area of the workpiece between the left and right pressure plates 220 and 230 by the alignment device 400. The portion of the workpiece with the straight weld seam is pressed against the lower support mold 210. The position of the workpiece is adjusted so that the straight weld seam and the alignment line are aligned. The left and right pressure plates 220 and 230 are driven by the clamping drive mechanism 240 to clamp the two sides of the straight weld seam with the lower support mold 210, thereby fixing the workpiece. The straight weld seam of the workpiece is exposed through the exposed weld seam area of the workpiece. At this time, the straight weld seam of the workpiece is aligned with the position of the grinding unit for grinding the workpiece. When grinding the workpiece, the front and rear drivers 320 drive the grinding assembly 310 to move forward and backward. The grinding assembly 310 grinds the straight weld seam of the workpiece in the front and rear directions through the grinding unit. The straight weld grinder of the embodiment of the present invention adopts a clamping structure of a lower support mold 210, a left pressure plate 220 and a right pressure plate 230, and cooperates with an alignment line projected toward the exposed area of the workpiece weld to align the straight weld, which has a good alignment effect and a stable clamping, and is conducive to improving the grinding quality.

[0032] In an embodiment, the alignment device 400 is a light emitter. The alignment device 400 is connected to the grinding assembly 310 and is located above the grinding section where the workpiece is ground. The alignment device 400 uses a light emitter, which is easily accessible and forms a clear and visible alignment line using light. Furthermore, the light emitter is connected to the grinding assembly 310 and is located above the grinding section where the workpiece is ground, making it convenient to simultaneously observe whether the alignment line is aligned with the straight weld and the grinding section. In an embodiment, the light emitter can be a straight line emitter or a crosshair emitter, and the specific selection can be based on actual conditions.

[0033] It is conceivable that the alignment device 400 is not limited to a light emitter and can be, for example, a projection lamp capable of projecting a linear shadow. In addition, the alignment device 400 is not limited to being connected to the polishing assembly 310 and can be positioned appropriately according to actual conditions by those skilled in the art.

[0034] In an embodiment, the position of the alignment device 400 relative to the polishing assembly 310 is adjustable, thereby facilitating actual adjustments and ensuring the alignment of the alignment line and the polishing portion. Specifically, the alignment device 400 is connected to the polishing assembly 310 via a flexible strip 410. The flexible strip 410 can be bent at will, thereby facilitating adjustments. It is conceivable that, in some embodiments, the alignment device 400 can also achieve the position adjustment of the alignment device 400 relative to the polishing assembly 310 through other structures. For example, the alignment device 400 is provided on the polishing assembly 310 through a connecting frame, and the connecting frame is provided with some screw adjustment mechanisms or threaded adjustment mechanisms to achieve the position adjustment of the alignment device 400. It is understandable that in this field, there are many implementation methods for achieving the adjustable position of components, and those skilled in the art can configure according to actual conditions.

[0035] In the embodiment, the grinding assembly 310 includes an assembly base 311, an up and down movable base 312, an up and down driver 313, a main motor 314, a driving wheel 315 and a driven wheel 316. The assembly base 311 is movably arranged on the machine base 100, the front and back drivers 320 are used to drive the assembly base 311 to move forward and backward, the up and down movable base 312 is movably arranged on the assembly base 311, the up and down driver 313 is arranged between the assembly base 311 and the up and down movable base 312 and is used to drive the up and down movable base 312 to move up and down, the main motor 314 is arranged on the up and down movable base 312, the driving wheel 315 is connected to the output shaft of the main motor 314, the driven wheel 316 is arranged on the up and down movable base 312, and the grinding part is a sanding belt, which is tensioned on the driving wheel 315 and the driven wheel 316. During grinding, the main motor 314 drives the driving wheel 315 to rotate, thereby driving the sanding belt to circulate and achieve grinding. The upper and lower movable base 312 can be driven downward by the upper and lower drivers 313 , so that the sanding belt can be pressed against the workpiece to ensure the grinding pressure.

[0036] In an embodiment, the up-and-down movable base 312 can be slidably disposed on the base 100 via a matching structure of a slide block or a guide rod sleeve, thereby achieving an up-and-down movable arrangement. The up-and-down driver 313 can specifically be a cylinder, or an electric push rod, etc. In an embodiment, the main motor 314 is fixed to the up-and-down movable base 312, and the driving wheel 315 is fixed to the output shaft of the main motor 314, thereby driving the driving wheel 315 to rotate. Of course, the output shaft of the main motor 314 can also be connected to the driving wheel 315 via a gear set, a belt drive, etc.

[0037] It is conceivable that in some embodiments, the grinding assembly 310 is not limited to the above-mentioned structure to achieve grinding. For example, the grinding part uses a grinding wheel for grinding, or the grinding part uses a grinding block that reciprocates back and forth for grinding, etc. The specific configuration can be made according to actual conditions.

[0038] In this embodiment, the driven wheel 316 and the driving wheel 315 are arranged sequentially from top to bottom, and the alignment line of the alignment device 400 is specifically aligned with a vertical plane passing through the axis of the driving wheel 315, thereby aligning with the position of the workpiece being polished by the belt. Of course, if the polishing unit adopts a grinding wheel or a grinding block structure, the alignment line is aligned with the circumference of the workpiece being polished by the grinding wheel, or with the polishing surface of the grinding block.

[0039] In an embodiment, the up and down movable seat 312 is provided with a tensioning driver 317 for driving the driven wheel 316 to move in a direction away from and close to the driving wheel 315. Through the tensioning driver 317, the driven wheel 316 can be driven away from the driving wheel 315, thereby achieving the tensioning of the sanding belt. When the driven wheel 316 is driven close to the driving wheel 315, the sanding belt can be loosened, thereby facilitating the replacement of the sanding belt. In an embodiment, the tensioning driver 317 is specifically a cylinder, which is fixed to the up and down movable seat 312, and the end of the piston rod of the cylinder is rotatably connected to the driven wheel 316, thereby driving the driven wheel 316 to move to adjust the tension of the sanding belt. Of course, it is conceivable that the tensioning driver 317 is not limited to using a cylinder, for example, it can also be a structure such as an electric push rod.

[0040] In an embodiment, the front and rear drive 320 includes a servo motor 321 and a linkage mechanism. The output shaft of the servo motor 321 drives the grinding assembly 310 to move forward and backward through the linkage mechanism. In an embodiment, the linkage mechanism is a screw mechanism. Of course, the linkage mechanism can also be other mechanisms that can convert rotational motion into linear motion, such as a gear rack mechanism. Driving the grinding assembly 310 to move forward and backward by the servo motor 321 provides strong controllability and good grinding quality. Of course, it is conceivable that in some embodiments, the front and rear drive 320 is not limited to the above-mentioned structure. For example, a cylinder, a linear motor, etc. can be used. The specific configuration can be based on actual conditions.

[0041] In an embodiment, the assembly seat 311 includes a base 3111 and a vertical adjustment seat 3112. The grinding unit is connected to the vertical adjustment seat 3112. A compensation driver 318 is provided between the base 3111 and the vertical adjustment seat 3112 for adjusting the vertical position of the vertical adjustment seat 3112 relative to the base 3111. With the above structure, when the grinding unit adopts a structure of some polishing wheels or grinding wheels, when the grinding unit is worn, the compensation driver 318 can adjust the vertical position of the vertical adjustment seat 3112 to compensate for the wear of the grinding unit, thereby effectively ensuring the grinding effect. In an embodiment, the grinding unit is specifically connected to the vertical adjustment seat 3112 via a main motor 314 and a vertical movable seat 312.

[0042] In an embodiment, the base 3111 and the upper and lower adjustment base 3112 can cooperate with each other through a matching structure of a slide block or a guide rod sleeve, thereby allowing relative vertical movement. In an embodiment, the compensation driver 318 can adopt a combination of a motor and a screw mechanism, where the motor drives the screw to rotate, and the screw nut drives the upper and lower adjustment base 3112 to move up and down relative to the base 3111. Of course, the compensation driver 318 is not limited to the above structure and can also be implemented by, for example, a motor and a gear rack structure or a linear motor.

[0043] In an embodiment, the base 3111 is provided with a left-right adjustment mechanism for adjusting the left-right position of the upper and lower adjustment seats 3112, thereby further increasing the adjustability of the device and improving practical use. In an embodiment, the base 3111 may include an upper seat and a base, and the upper seat and the base can move left and right relative to each other. The upper and lower adjustment seats 3112 are provided on the upper seat, and the left-right adjustment mechanism can adopt some manual screw mechanisms or screw adjustment structures to achieve the relative left-right position adjustment of the upper seat and the base. It is conceivable that in this field, there are many other implementation methods for achieving the adjustment of the position of a component along a predetermined direction, and those skilled in the art can configure according to actual conditions.

[0044] In the embodiment, the clamping drive mechanism 240 includes a left lever 241, a right lever 242, a left driver 243 and a right driver 244. The left lever 241 and the right lever 242 are respectively arranged on the left and right sides of the lower mold 210 and are arranged along the left and right directions. The position between the left and right ends of the left lever 241 and the right lever 242 is hinged to the machine base 100. The left driver 243 is arranged on the machine base 100 and connected to the left end of the left lever 241. The left driver 243 is used to drive the left end of the left lever 241 up and down. The left pressure plate 220 is connected to the right end of the left lever 241. The right driver 244 is arranged on the machine base 100 and connected to the right end of the right lever 242. The right driver 244 is used to drive the right end of the right lever 242 up and down. The right pressure plate 230 is connected to the left end of the right lever 242. When the left actuator 243 and the right actuator 244 respectively drive the left end of the left lever 241 and the right end of the right lever 242 up and down, they can drive the left pressure plate 220 and the right pressure plate 230 to press down and lift up, thereby clamping and releasing the workpiece. With the above structure, the lever-type structure has sufficient clamping force and the workpiece is firmly fixed.

[0045] In this embodiment, the left and right actuators 243 and 244 are pneumatic cylinders, the cylinder bodies of which are hingedly connected to the base 100, and the piston rods of the cylinders are hingedly connected to the ends of the corresponding levers, thereby driving the ends of the corresponding levers to move up and down. Of course, it is conceivable that the left and right actuators 243 and 244 can also adopt structures such as electric push rods, and the specific configuration can be based on actual conditions.

[0046] Of course, it is conceivable that in other embodiments, the clamping drive mechanism 240 is not limited to the above-mentioned structure. For example, two upper and lower drivers 313, such as cylinders, electric push rods, etc., are used to respectively drive the left pressure plate 220 and the right pressure plate 230 up and down to achieve clamping and loosening of the workpiece.

[0047] In an embodiment, the left and right positions of the left pressure plate 220 and the right pressure plate 230 are adjustable, respectively, so that they can be easily adjusted according to the size of the workpiece, and have strong adaptability. In an embodiment, the left pressure plate 220 and the right pressure plate 230 are provided with strip holes extending left and right, and screws are passed through the strip holes. The screws fix the left pressure plate 220 and the right pressure plate 230 to the left lever 241 and the right lever 242 respectively. When the left and right positions of the left pressure plate 220 and the right pressure plate 230 need to be adjusted, the screws are loosened for adjustment, and the screws are retightened after adjustment. Of course, it is conceivable that the left and right pressure plates 220 and 230 are not limited to the above-mentioned structure to achieve left and right position adjustment. For example, by setting a plurality of gear holes arranged left and right on the lever, the pressure plates can be installed through different gear holes respectively, thereby also achieving left and right adjustment.

[0048] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A straight weld grinding machine, characterized in that: include: Machine base (100); A workpiece clamp (200) is arranged on the machine base (100), and the workpiece clamp (200) includes a lower mold (210), a left pressure plate (220), a right pressure plate (230) and a clamping drive mechanism (240). The left pressure plate (220) and the right pressure plate (230) are respectively arranged on the left and right sides of the lower mold (210). A workpiece clamping position is formed between the left pressure plate (220) and the upper left end of the lower mold (210), and between the right pressure plate (230) and the upper right end of the lower mold (210). A workpiece weld exposed area extending in a front-to-back direction is formed between the left pressure plate (220) and the right pressure plate (230). The clamping drive mechanism (240) is used to drive the left pressure plate (220) and the right pressure plate (230) to clamp and release the workpiece. A grinding device (300) is provided on the machine base (100), the grinding device (300) comprising a grinding assembly (310) and a front and rear drive (320), the grinding assembly (310) being provided with a grinding portion, the front and rear drive (320) being used to drive the grinding assembly (310) to move forward and backward, and the grinding portion being able to move above the exposed area of the workpiece weld; An alignment device (400) is configured to project an alignment line extending in a front-to-back direction to the exposed weld area of the workpiece and aligned with a position where the grinding part grinds the workpiece.

2. The straight weld grinding machine according to claim 1, characterized in that: The alignment device (400) is a light emitter, and the alignment device (400) is connected to the grinding assembly (310) and is located above the position where the grinding part grinds the workpiece.

3. The straight weld grinding machine according to claim 1 or 2, characterized in that: The position of the alignment device (400) relative to the grinding assembly (310) is adjustable.

4. The straight weld grinding machine according to claim 1 or 2, characterized in that: The alignment device (400) is connected to the grinding assembly (310) via a flexible strip (410).

5. The straight weld grinding machine according to claim 1, characterized in that: The grinding assembly (310) includes an assembly seat (311), an up-and-down movable seat (312), an up-and-down driver (313), a main motor (314), a driving wheel (315) and a driven wheel (316), wherein the assembly seat (311) is movably arranged on the machine base (100) in a forward and backward manner, and the front and rear drivers (320) are used to drive the assembly seat (311) to move forward and backward, and the up-and-down movable seat (312) is movably arranged on the assembly seat (311) in a forward and backward manner, and the up-and-down driver (320) is ... 13) is arranged between the component seat (311) and the up-and-down movable seat (312) and is used to drive the up-and-down movable seat (312) to move up and down, the main motor (314) is arranged on the up-and-down movable seat (312), the driving wheel (315) is connected to the output shaft of the main motor (314), the driven wheel (316) is arranged on the up-and-down movable seat (312), the grinding part is a sanding belt, and the sanding belt is tensioned on the driving wheel (315) and the driven wheel (316).

6. The straight weld grinding machine according to claim 5, characterized in that: The up-and-down moving seat (312) is provided with a tensioning driver (317) for driving the driven wheel (316) to move in a direction away from and toward the driving wheel (315).

7. The straight weld grinding machine according to claim 1, characterized in that: The front and rear drive (320) comprises a servo motor (321) and a linkage mechanism, and the output shaft of the servo motor (321) drives the grinding assembly (310) to move forward and backward through the linkage mechanism.

8. The straight weld grinding machine according to claim 1, characterized in that: The grinding assembly (310) includes an assembly seat (311), the assembly seat (311) is movably arranged on the machine base (100) in a forward and backward manner, the front and rear drive (320) is used to drive the assembly seat (311) to move forward and backward, the assembly seat (311) includes a base (3111) and an upper and lower adjustment seat (3112), the grinding part is connected to the upper and lower adjustment seat (3112), and a compensation drive (318) is provided between the base (3111) and the upper and lower adjustment seat (3112) for adjusting the upper and lower positions of the upper and lower adjustment seat (3112) relative to the base (3111).

9. The straight weld grinding machine according to claim 1, characterized in that: The clamping drive mechanism (240) includes a left lever (241), a right lever (242), a left driver (243) and a right driver (244). The left lever (241) and the right lever (242) are respectively arranged on the left and right sides of the lower backing mold (210) and arranged along the left and right directions. The position between the left and right ends of the left lever (241) and the right lever (242) is hinged to the machine base (100). The left driver (243) is arranged on the machine base (100) and is connected to the machine base (100). The left end of the left lever (241) is connected, the left driver (243) is used to drive the left end of the left lever (241) to move up and down, the left pressure plate (220) is connected to the right end of the left lever (241), the right driver (244) is set on the machine base (100) and connected to the right end of the right lever (242), the right driver (244) is used to drive the right end of the right lever (242) to move up and down, and the right pressure plate (230) is connected to the left end of the right lever (242).

10. The straight weld grinding machine according to claim 1 or 9, characterized in that: The left and right positions of the left pressure plate (220) and the right pressure plate (230) are adjustable respectively.

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