A welding fixture for sheet metal parts of handrail vertical support

Abstract

This invention relates to a welding fixture for sheet metal handrail vertical supports, comprising a fixture base with a left clamping part and a right clamping part arranged opposite to each other on the base. The left clamping part is used to clamp and position the sheet metal parts of the first and second left handrail vertical supports, and the right clamping part is used to clamp and position the sheet metal parts of the first and second right handrail vertical supports. The above-mentioned solution provided by this invention can effectively clamp and position the sheet metal parts of the first, second, first, and second left and right handrail vertical supports, meeting the clamping requirements of automated welding and improving welding efficiency and welding quality.

Description

Technical Field

[0001] This invention relates to the field of automotive seat manufacturing, specifically to a welding fixture for a sheet metal armrest vertical support. Background Technology

[0002] The frame of a car seat includes the left armrest frame assembly and the right armrest frame assembly, located on the left and right sides. The left and right armrest vertical supports are important components of the left and right armrest frame assemblies. The structures of the left and right armrest vertical supports are as follows: Figure 1 As shown, the left handrail vertical support is welded from sheet metal parts of the first and second left handrail vertical supports, and the right handrail vertical support is welded from sheet metal parts of the first and second right handrail vertical supports. Traditionally, the production of the left and right handrail vertical supports relies mainly on manual operation on a welding table, which suffers from high labor intensity and difficulty in guaranteeing product quality. Automated welding technology can effectively solve these problems, but it requires ensuring reliable clamping of the sheet metal parts to ensure reliable welding of the parts to be welded. Summary of the Invention

[0003] The purpose of this invention is to provide a welding fixture for the sheet metal parts of the handrail vertical support, which can solve the above problems and reliably clamp and fix the sheet metal parts that make up the left and right handrail vertical supports, thus ensuring the needs of automated welding.

[0004] The specific technical solution adopted in this invention is as follows.

[0005] A welding fixture for sheet metal parts of handrail vertical supports, characterized in that: it includes a fixture base, on which a left clamping part and a right clamping part are arranged opposite to each other. The left clamping part is used to clamp and position the sheet metal parts of the first and second left handrail vertical supports, and the right clamping part is used to clamp and position the sheet metal parts of the first and second right handrail vertical supports.

[0006] A further solution is as follows: the sheet metal parts of the left first handrail vertical support and the left second handrail vertical support are channel-shaped sheet metal parts. The width of the slot of the left first handrail vertical support is smaller than the width of the slot of the left second handrail vertical support. The groove wall of the left first handrail vertical support is located inside the groove wall of the left first handrail vertical support and overlaps with it. The two ends of the left first handrail vertical support and the left second handrail vertical support are respectively referred to as the left end and the left end. The left clamping part includes a left clamping unit and a left clamping unit. The left clamping unit is used to clamp and position the left end of the left first handrail vertical support and the left second handrail vertical support. The left clamping unit is used to clamp and position the left end of the left first handrail vertical support and the left second handrail vertical support.

[0007] The slot of the left first handrail vertical support sheet metal part is arranged downward, and the slot of the left second handrail vertical support sheet metal part is arranged upward. There is a gap A in the middle of the inner groove wall of the left first handrail vertical support sheet metal part, and there is a hole A in the middle of the outer groove wall of the left first handrail vertical support sheet metal part. The gap A and the hole A are arranged correspondingly. The left clamping part also includes a left third clamping unit. The left third clamping unit is arranged corresponding to the left hole to clamp and position the middle of the left first handrail vertical support sheet metal part and the left second handrail vertical support sheet metal part.

[0008] The left handrail vertical support sheet metal part has an A11 hole at the bottom of the groove at the left end, and the left handrail vertical support sheet metal part has an A12 hole at the bottom of the groove at the left end. The left clamping unit includes an A1 support block fixedly installed on the clamp and an A1 clamping block movably installed. The A1 support block supports the bottom of the groove at the left end of the left handrail vertical support sheet metal part. The A1 support block is provided with vertically arranged A1 positioning pins. The A1 positioning pins are used to insert into the A11 hole and the A12 hole. The A1 clamping block is used to clamp the bottom of the groove at the left end of the left handrail vertical support sheet metal part. The middle part of the A1 clamping block is provided with an A1 gap for accommodating the upper end of the A1 positioning pin.

[0009] The left-hand handrail vertical support sheet metal part has an A21 hole at the bottom of the groove at the second left end, and an A22 hole at the bottom of the groove at the second left end. The left-hand clamping unit includes an A2 support block fixedly installed on the clamp and an A2 clamping block movably installed. The A2 support block supports the bottom of the groove at the second left end of the left-hand handrail vertical support sheet metal part. The A2 support block is provided with vertically arranged A2 positioning pins. The A2 positioning pins are used to insert into the A21 hole and the A22 hole. The A2 clamping block is used to clamp the bottom of the groove at the second left end of the left-hand handrail vertical support sheet metal part. The middle part of the A2 clamping block is provided with an A2 gap for accommodating the upper end of the A2 positioning pin.

[0010] The A1 positioning block is installed at one end of the A1 clamping arm. The middle part of the A1 clamping arm is hinged to the A1 mounting bracket set on the fixture base. The other end of the A1 clamping arm is hinged to the A11 driving component set on the fixture base. The A11 driving component is a vertically arranged cylinder or electric cylinder.

[0011] The A2 positioning block is installed at one end of the A2 clamping arm. The middle part of the A2 clamping arm is hinged to the A2 mounting bracket set on the fixture base. The other end of the A2 clamping arm is hinged to the A21 driving component set on the fixture base. The A21 driving component is a vertically arranged cylinder or electric cylinder.

[0012] The left ends of the sheet metal parts of the first and second left handrail vertical supports are enclosed to form the A1 cavity. The left clamping unit also includes an A1 adjustment component for penetrating into the A1 cavity. The A1 adjustment component is used to limit the size of the gap d11, which is the gap between the bottom of the groove at the left end of the first left handrail vertical support sheet metal part and the bottom of the groove at the left end of the second left handrail vertical support sheet metal part. The A1 adjustment component includes an A11 adjustment plate and an A12 adjustment plate arranged opposite to each other. The upper plate of the A11 adjustment plate is provided with an A11 boss for supporting the end of the left end of the first left handrail vertical support sheet metal part. The lower plate of the A12 adjustment plate is provided with an A12 boss for supporting the end of the left end of the second left handrail vertical support sheet metal part. The A1 adjustment component is installed movably along the depth direction of the A1 cavity.

[0013] The left two ends of the sheet metal parts of the first and second left handrail vertical supports form the A2 cavity. The second left clamping unit also includes an A2 adjustment component for penetrating the A2 cavity. The A2 adjustment component is used to limit the size of the gap d12, which is the distance between the bottom of the groove at the left two ends of the first and second left handrail vertical supports. The A2 adjustment component includes an A21 adjustment plate and an A22 adjustment plate arranged opposite to each other. The upper plate of the A21 adjustment plate is provided with an A21 boss for supporting the ends of the left two left handrail vertical supports. The lower plate of the A22 adjustment plate is provided with an A22 boss for supporting the ends of the left two left handrail vertical supports. The A2 adjustment component is installed movably along the depth direction of the A2 cavity.

[0014] The fixture base is equipped with an A12 drive unit, which is a horizontally arranged cylinder or electric cylinder. The A12 drive unit is equipped with an A12 mounting bracket, and the A1 adjustment component is mounted on the A12 mounting bracket.

[0015] The fixture base is equipped with an A22 drive unit, which is a horizontally arranged pneumatic or electric cylinder. The A22 drive unit is equipped with an A22 mounting bracket, and the A2 adjustment component is mounted on the A22 mounting bracket.

[0016] The left three-clamp unit includes horizontally arranged A pins. The A pins are inserted from the A gap and positioned with the A hole. The length direction of the A pins is consistent with the A direction and is installed in a movable manner along the A direction. The A direction is the direction from the A gap to the A hole.

[0017] The fixture base is equipped with an A3 drive unit, which is a horizontally arranged cylinder or electric cylinder. The A3 drive unit is equipped with an A3 mounting bracket, and the A pin is installed on the A3 mounting bracket. The A3 drive unit is located on the lower side of the sheet metal part of the left second handrail vertical bracket.

[0018] The structures of the left clamping part and the right clamping part are identical.

[0019] The above-mentioned solution provided by the present invention can effectively clamp and position the sheet metal parts of the left first handrail vertical support, the left second handrail vertical support, the right first handrail vertical support, and the right second handrail vertical support, thereby meeting the clamping requirements of automated welding and improving welding efficiency and welding quality. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the left and right handrail vertical supports.

[0021] Figure 2 This is a schematic diagram of the structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure for clamping the left handrail vertical support and the right handrail vertical support of the present invention.

[0023] Figure 4 for Figure 2 A schematic diagram of the structure after removing clamping blocks A1, A2, B1, and B2.

[0024] The correspondence between the reference numerals and components in the attached drawings is as follows: 01-Sheet metal part of the first left handrail vertical bracket, 02-Sheet metal part of the second left handrail vertical bracket, 03-Sheet metal part of the first right handrail vertical bracket, 04-Sheet metal part of the second right handrail vertical bracket, 10-Clamp base, 11-A1 clamping block, 12-A2 clamping block, 13-B1 clamping block, 14-B2 clamping block, 15-A pin, 16-B pin, 21-A11 driving component, 22-A12 driving component, 23-A2 1. Drive component, 24-A22 drive component, 25-A3 drive component, 26-B11 drive component, 27-B12 drive component, 28-B21 drive component, 29-B22 drive component, 30-B3 drive component, 31-A1 adjustment assembly, 32-A2 adjustment assembly, 33-B1 adjustment assembly, 34-B2 adjustment assembly, 41-A1 positioning pin, 42-A2 positioning pin, 43-B1 positioning pin, 44-B2 positioning pin. Detailed Implementation

[0025] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0026] like Figure 1 , 2As shown, a welding fixture for a handrail vertical support sheet metal part includes a fixture base 10. The fixture base 10 is provided with a left clamping part and a right clamping part arranged opposite to each other on the left and right. The left clamping part is used to clamp and position the left first handrail vertical support sheet metal part 01 and the left second handrail vertical support sheet metal part 02, and the right clamping part is used to clamp and position the right first handrail vertical support sheet metal part 03 and the right second handrail vertical support sheet metal part 04. A further proposed solution is as follows: The left first handrail vertical support sheet metal part 01 and the left second handrail vertical support sheet metal part 02 are channel-shaped sheet metal parts. The width of the channel opening of the left first handrail vertical support sheet metal part 01 is smaller than the width of the channel opening of the left second handrail vertical support sheet metal part 02. The channel wall at the opening of the left first handrail vertical support sheet metal part 01 is located inside the channel wall at the opening of the left second handrail vertical support sheet metal part 02 and overlaps with it. The two ends of the left first handrail vertical support sheet metal part 01 and the left second handrail vertical support sheet metal part 02 are respectively marked... The left clamping part consists of a left-first end (the end for connecting with the square steel of the handrail horizontal support) and a left-second end (the end for connecting with the sheet metal of the slide rail support). The left clamping part includes a left-first clamping unit and a left-second clamping unit. The left-first clamping unit is used to clamp and position the left ends of the left-first handrail vertical support sheet metal 01 and the left-second handrail vertical support sheet metal 02. The left-second clamping unit is used to clamp and position the left ends of the left-first handrail vertical support sheet metal 01 and the left-second handrail vertical support sheet metal 02. The slot of the left first handrail vertical support sheet metal part 01 is arranged downwards, while the slot of the left second handrail vertical support sheet metal part 02 is arranged upwards. A gap A is provided in the middle of the inner groove wall of the left first handrail vertical support sheet metal part 01, and a hole A is provided in the middle of the outer groove wall of the left first handrail vertical support sheet metal part 01. The gap A and the hole A are arranged correspondingly. The left clamping part also includes a left third clamping unit, which is arranged corresponding to the left hole to clamp and position the middle parts of the left first handrail vertical support sheet metal part 01 and the left second handrail vertical support sheet metal part 02. Through the above-mentioned positioning units, the sheet metal parts can be effectively clamped and positioned.

[0027] Further options include: Figure 3 , 4As shown, the left end of the left handrail vertical support sheet metal part 01 has an A11 hole at the bottom of its groove, and the left end of the left second handrail vertical support sheet metal part 02 has an A12 hole at the bottom of its groove. The left clamping unit includes an A1 support block fixedly mounted on the clamp and an A1 clamping block 11 movably mounted on the clamp. The A1 support block supports the bottom of the left end groove of the left second handrail vertical support sheet metal part 02. The A1 support block has vertically arranged A1 positioning pins 41, which are used to insert into the A11 and A12 holes. The A1 clamping block 11 is used to clamp the bottom of the left end groove of the left first handrail vertical support sheet metal part 01. The middle of the A1 clamping block 11 has an A1 gap for accommodating the upper end of the A1 positioning pin 41. The left handrail vertical support sheet metal part 01 has an A21 hole at the bottom of the groove at the left two ends, and the left handrail vertical support sheet metal part 02 has an A22 hole at the bottom of the groove at the left two ends. The left two clamping unit includes an A2 support block fixedly installed on the clamp and an A2 clamping block 12 movably installed. The A2 support block supports the bottom of the groove at the left two ends of the left handrail vertical support sheet metal part 02. The A2 support block is provided with vertically arranged A2 positioning pins 42, which are used to insert into the A21 hole and the A22 hole. The A2 clamping block 12 is used to clamp the bottom of the groove at the left two ends of the left handrail vertical support sheet metal part 01. The middle part of the A2 clamping block 12 is provided with an A2 gap for accommodating the upper end of the A2 positioning pin 42. The A1 positioning block is installed at one end of the A1 clamping arm. The middle part of the A1 clamping arm is hinged to the A1 mounting bracket provided on the clamp base 10. The other end of the A1 clamping arm is hinged to the A11 driving member 21 provided on the clamp base 10. The A11 driving member 21 is a vertically arranged cylinder or electric cylinder. The A2 positioning block is installed at one end of the A2 clamping arm. The middle part of the A2 clamping arm is hinged to the A2 mounting bracket provided on the clamp base 10. The other end of the A2 clamping arm is hinged to the A21 driving member 23 provided on the clamp base 10. The A21 driving member 23 is a vertically arranged cylinder or electric cylinder.The left ends of the left first handrail vertical support sheet metal part 01 and the left second handrail vertical support sheet metal part 02 are enclosed to form the A1 cavity. The left clamping unit also includes an A1 adjustment component 31 for penetrating into the A1 cavity. The A1 adjustment component 31 is used to limit the size of the gap d11. The gap d11 is the distance between the bottom of the groove at the left end of the left first handrail vertical support sheet metal part 01 and the bottom of the groove at the left end of the left second handrail vertical support sheet metal part 02. The A1 adjustment component 31 includes an A11 adjustment plate and an A12 adjustment plate arranged opposite to each other. The upper plate surface of the A11 adjustment plate is provided with an A11 boss for supporting the end of the left first handrail vertical support sheet metal part 01. The lower plate surface of the A12 adjustment plate is provided with an A12 boss for supporting the end of the left second handrail vertical support sheet metal part 02. The A1 adjustment component 31 is movably installed along the depth direction of the A1 cavity. The left two ends of the left first handrail vertical support sheet metal part 01 and the left second handrail vertical support sheet metal part 02 enclose each other to form the A2 cavity. The left second clamping unit also includes an A2 adjustment component 32 for penetrating into the A2 cavity. The A2 adjustment component 32 is used to limit the size of the gap d12. The gap d12 is the distance between the bottom of the groove at the left two ends of the left first handrail vertical support sheet metal part 01 and the bottom of the groove at the left two ends of the left second handrail vertical support sheet metal part 02. The A2 adjustment component 32 includes an A21 adjustment plate and an A22 adjustment plate arranged opposite to each other. The upper plate surface of the A21 adjustment plate is provided with an A21 boss for supporting the ends of the left two ends of the left first handrail vertical support sheet metal part 01. The lower plate surface of the A22 adjustment plate is provided with an A22 boss for supporting the ends of the left two ends of the left second handrail vertical support sheet metal part 02. The A2 adjustment component 32 is movably installed along the depth direction of the A2 cavity. The fixture base 10 is equipped with an A12 driving component 22, which is a horizontally arranged cylinder or electric cylinder. An A12 mounting bracket is mounted on the A12 driving component 22, and an A1 adjustment component 31 is mounted on the A12 mounting bracket. The fixture base 10 is also equipped with an A22 driving component 24, which is a horizontally arranged cylinder or electric cylinder. An A22 mounting bracket is mounted on the A22 driving component 24, and an A2 adjustment component 32 is mounted on the A22 mounting bracket. The left third clamping unit includes a horizontally arranged A pin 15. The A pin 15 is inserted into the A hole from the A-gap for assembly and positioning. The length direction of the A pin 15 is consistent with the A-direction and it is installed movably along the A-direction, which is the direction from the A-gap to the A-hole. The fixture base 10 is provided with an A3 drive component 25, which is a horizontally arranged cylinder or electric cylinder. The A3 drive component 25 is provided with an A3 mounting bracket, and the A pin 15 is installed on the A3 mounting bracket. The A3 drive component 25 is located on the lower side of the sheet metal part 02 of the left second handrail vertical bracket.

[0028] The above structure is simple, and the clamping of various sheet metal parts is convenient and reliable, improving clamping efficiency and reliability.

[0029] The structures of the left clamping part and the right clamping part are identical. Specifically, the right first handrail vertical support sheet metal part 03 and the right second handrail vertical support sheet metal part 04 are channel-shaped sheet metal parts. The width of the slot of the right first handrail vertical support sheet metal part 03 is smaller than the width of the slot of the right second handrail vertical support sheet metal part 04. The slot wall of the right first handrail vertical support sheet metal part 03 is located inside the slot wall of the right first handrail vertical support sheet metal part 04 and overlaps with it. The two ends of the right first handrail vertical support sheet metal part 03 and the right second handrail vertical support sheet metal part 04 are respectively referred to as the right end and the right end. The right clamping part includes a right clamping unit and a right clamping unit. The right clamping unit is used to clamp and position the right end of the right first handrail vertical support sheet metal part 03 and the right second handrail vertical support sheet metal part 04. The right clamping unit is used to clamp and position the right end of the right first handrail vertical support sheet metal part 03 and the right second handrail vertical support sheet metal part 04. The slot of the right first handrail vertical bracket sheet metal part 03 is arranged downward, and the slot of the right second handrail vertical bracket sheet metal part 04 is arranged upward. A B-shaped gap is provided in the middle of the inner groove wall of the right first handrail vertical bracket sheet metal part 03, and a B-shaped hole is provided in the middle of the outer groove wall of the right first handrail vertical bracket sheet metal part 03. The B-shaped gap and the B-shaped hole are arranged correspondingly. The right clamping part also includes a right third clamping unit. The right third clamping unit is arranged corresponding to the right hole to clamp and position the middle of the right first handrail vertical bracket sheet metal part 03 and the right second handrail vertical bracket sheet metal part 04. The right end of the vertical support sheet metal part 03 of the right handrail has a B11 hole at the bottom of the groove, and the right end of the vertical support sheet metal part 04 of the right handrail has a B12 hole at the bottom of the groove. The right clamping unit includes a B1 support block fixedly installed on the clamp and a B1 clamping block 13 movably installed. The B1 support block supports the bottom of the groove at the right end of the vertical support sheet metal part 04 of the right handrail. The B1 support block is provided with a vertically arranged B1 positioning pin 43. The B1 positioning pin 43 is used to insert into the B11 hole and the B12 hole. The B1 clamping block 13 is used to clamp the bottom of the groove at the right end of the vertical support sheet metal part 03 of the right handrail. The middle part of the B1 clamping block 13 is provided with a B1 gap for accommodating the upper end of the B1 positioning pin 43. The right handrail vertical support sheet metal part 03 has a B21 hole at the bottom of the groove at the right end, and the right handrail vertical support sheet metal part 04 has a B22 hole at the bottom of the groove at the right end. The right clamping unit includes a B2 support block fixedly installed on the clamp and a B2 clamping block 14 movably installed. The B2 support block supports the bottom of the groove at the right end of the right handrail vertical support sheet metal part 04. The B2 support block is provided with a vertically arranged B2 positioning pin 44. The B2 positioning pin 44 is used to insert into the B21 hole and the B22 hole. The B2 clamping block 14 is used to clamp the bottom of the groove at the right end of the right handrail vertical support sheet metal part 03. The middle part of the B2 clamping block 14 is provided with a B2 gap for accommodating the upper end of the B2 positioning pin 44.The B1 positioning block is installed at one end of the B1 clamping arm. The middle part of the B1 clamping arm is hinged to the B1 mounting bracket provided on the fixture base 10. The other end of the B1 clamping arm is hinged to the B11 driving member 26 provided on the fixture base 10. The B11 driving member 26 is a vertically arranged cylinder or electric cylinder. The B2 positioning block is installed at one end of the B2 clamping arm. The middle part of the B2 clamping arm is hinged to the B2 mounting bracket provided on the fixture base 10. The other end of the B2 clamping arm is hinged to the B21 driving member 28 provided on the fixture base 10. The B21 driving member 28 is a vertically arranged cylinder or electric cylinder. The right ends of the right first handrail vertical support sheet metal part 03 and the right second handrail vertical support sheet metal part 04 enclose to form a B1 cavity. The right clamping unit also includes a B1 adjustment component 33 for extending into the B1 cavity. The B1 adjustment component 33 is used to limit the size of the gap d21. The gap d21 is the distance between the bottom of the groove at the right end of the right first handrail vertical support sheet metal part 03 and the bottom of the groove at the right end of the right second handrail vertical support sheet metal part 04. The B1 adjustment component 33 includes a B11 adjustment plate and a B12 adjustment plate arranged opposite to each other. The upper plate surface of the B11 adjustment plate is provided with a B11 boss for supporting the end of the right first handrail vertical support sheet metal part 03. The lower plate surface of the B12 adjustment plate is provided with a B12 boss for supporting the end of the right second handrail vertical support sheet metal part 04. The B1 adjustment component 33 is movably installed along the depth direction of the B1 cavity. The right ends of the right first handrail vertical support sheet metal part 03 and the right second handrail vertical support sheet metal part 04 enclose each other to form a cavity B2. The right second clamping unit also includes a B2 adjustment component 34 for extending into the cavity B2. The B2 adjustment component 34 is used to limit the size of the gap d22, which is the distance between the bottom of the groove at the right second end of the right first handrail vertical support sheet metal part 03 and the bottom of the groove at the right second end of the right second handrail vertical support sheet metal part 04. The B2 adjustment component 34 includes an upper and lower B21 adjustment plate and a B22 adjustment plate arranged opposite to each other. The upper plate of the B21 adjustment plate is provided with a B21 boss for supporting the ends of the right second handrail vertical support sheet metal part 03. The lower plate of the B22 adjustment plate is provided with a B22 boss for supporting the ends of the right second handrail vertical support sheet metal part 04. The B2 adjustment component 34 is movably installed along the depth direction of the cavity B2. The fixture base 10 is provided with a B12 drive component 27, which is a horizontally arranged cylinder or electric cylinder. A B12 mounting bracket is provided on the B12 drive component 27, and a B1 adjustment component 33 is mounted on the B12 mounting bracket. The fixture base 10 is provided with a B22 drive component 29, which is a horizontally arranged cylinder or electric cylinder. A B22 mounting bracket is provided on the B22 drive component 29, and a B2 adjustment component 34 is mounted on the B22 mounting bracket.The right third clamping unit includes a horizontally arranged B pin 16. The B pin 16 is inserted into the B hole through the B gap for assembly and positioning. The length direction of the B pin 16 is consistent with the B direction and is installed movably along the B direction, which is the direction from the B gap to the B hole. A B3 driving component 30 is provided on the clamp base 10. The B3 driving component 30 is a horizontally arranged cylinder or electric cylinder. A B3 mounting bracket is provided on the B3 driving component 30. The B pin 16 is mounted on the B3 mounting bracket. The B3 driving component 30 is located on the lower side of the right second handrail vertical bracket sheet metal part 04.

[0030] In specific operation, A11 drive component 21 and B11 drive component 26 are placed on the outside of the left handrail vertical support and the right handrail vertical support, respectively; A21 drive component 23 and B21 drive component 28 are placed between the left handrail vertical support and the right handrail vertical support; A12 drive component 22 and B12 drive component 27 are placed on the outside of the left end of the left handrail vertical support and the right end of the right handrail vertical support, respectively; and A22 drive component 24 and B22 drive component 29 are placed on the outside of the left two ends of the left handrail vertical support and the right two ends of the right handrail vertical support, respectively.

[0031] During clamping, first arrange the sheet metal parts 02 and 04 of the left second handrail vertical bracket, and position them using positioning pins 41 (A1), 42 (A2), 43 (B1), and 44 (B2). Then place the sheet metal parts 01 and 03 of the left first handrail vertical bracket, and adjust the clamping units (right first, right second, right third, left first, left second, and left third) to clamp them, thus achieving reliable and rapid clamping of the sheet metal parts 01, 03, 02, and 04 of the left second handrail vertical bracket. Then, the welding robot next to the fixture is started to reliably and quickly weld between the sheet metal parts 01 and 03 of the left handrail vertical bracket and the sheet metal parts 03 of the right handrail vertical bracket according to the preset welding program. After the welding is completed, the right clamping unit, the right second clamping unit, the right third clamping unit, the left clamping unit, the left second clamping unit, and the left third clamping unit are opened, and the welded left handrail vertical bracket and the right handrail vertical bracket can be removed.

[0032] The above-mentioned solution provided by the present invention can effectively clamp and position the sheet metal parts 01, 02, 03, and 04 of the left first handrail vertical support, thereby meeting the clamping requirements of automated welding and improving welding efficiency and welding quality.

[0033] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, mechanisms, and operating methods not specifically described or explained in this invention, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. A welding fixture for sheet metal parts of a handrail vertical support, characterized in that: The fixture includes a base with a left clamping part and a right clamping part arranged opposite to each other. The left clamping part is used to clamp and position the sheet metal parts of the first and second left handrail vertical supports, and the right clamping part is used to clamp and position the sheet metal parts of the first and second right handrail vertical supports. The sheet metal parts of the first and second left handrail vertical supports are channel-shaped sheet metal parts. The width of the channel of the first left handrail vertical support is smaller than the width of the channel of the second left handrail vertical support. The channel wall of the first left handrail vertical support is located inside the channel wall of the second left handrail vertical support and overlaps with it. The two ends of the first and second left handrail vertical supports are respectively referred to as the first left end and the second left end. The left clamping part includes a left... The unit includes a first clamping unit and a second left clamping unit. The first left clamping unit is used to clamp and position the left end of the first and second left handrail vertical support sheet metal parts. The second left clamping unit is used to clamp and position the left ends of the first and second left handrail vertical support sheet metal parts. The slot of the first left handrail vertical support sheet metal part is arranged downward, and the slot of the second left handrail vertical support sheet metal part is arranged upward. A gap A is provided in the middle of the inner groove wall of the first left handrail vertical support sheet metal part, and an A hole is provided in the middle of the outer groove wall of the first left handrail vertical support sheet metal part. The gap A and the A hole are arranged correspondingly. The left clamping part also includes a third left clamping unit, which is arranged corresponding to the left hole to clamp and position the middle of the first and second left handrail vertical support sheet metal parts. The left handrail vertical support sheet metal part has an A11 hole at the bottom of the groove at the left end, and the left handrail vertical support sheet metal part has an A12 hole at the bottom of the groove at the left end. The left clamping unit includes an A1 support block fixedly installed on the clamp and an A1 clamping block movably installed. The A1 support block supports the bottom of the groove at the left end of the left handrail vertical support sheet metal part. The A1 support block is provided with vertically arranged A1 positioning pins. The A1 positioning pins are used to insert into the A11 hole and the A12 hole. The A1 clamping block is used to clamp the bottom of the groove at the left end of the left handrail vertical support sheet metal part. The middle part of the A1 clamping block is provided with an A1 gap for accommodating the upper end of the A1 positioning pin. The left-hand handrail vertical support sheet metal part has an A21 hole at the bottom of the groove at the second left end, and an A22 hole at the bottom of the groove at the second left end. The left-hand clamping unit includes an A2 support block fixedly installed on the clamp and an A2 clamping block movably installed. The A2 support block supports the bottom of the groove at the second left end of the left-hand handrail vertical support sheet metal part. The A2 support block is provided with vertically arranged A2 positioning pins. The A2 positioning pins are used to insert into the A21 hole and the A22 hole. The A2 clamping block is used to clamp the bottom of the groove at the second left end of the left-hand handrail vertical support sheet metal part. The middle part of the A2 clamping block is provided with an A2 gap for accommodating the upper end of the A2 positioning pin. A1 clamping block is installed at one end of A1 clamping arm. The middle part of A1 clamping arm is hinged to A1 mounting bracket on the fixture base. The other end of A1 clamping arm is hinged to A11 driving component on the fixture base. A11 driving component is a vertically arranged cylinder or electric cylinder. A2 clamping block is installed at one end of A2 clamping arm. The middle part of A2 clamping arm is hinged to A2 mounting bracket on the fixture base. The other end of A2 clamping arm is hinged to A21 driving component on the fixture base. A21 driving component is a vertically arranged cylinder or electric cylinder. The left ends of the sheet metal parts of the first and second left handrail vertical supports are enclosed to form the A1 cavity. The left clamping unit also includes an A1 adjustment component for penetrating into the A1 cavity. The A1 adjustment component is used to limit the size of the gap d11, which is the gap between the bottom of the groove at the left end of the first left handrail vertical support sheet metal part and the bottom of the groove at the left end of the second left handrail vertical support sheet metal part. The A1 adjustment component includes an A11 adjustment plate and an A12 adjustment plate arranged opposite to each other. The upper plate of the A11 adjustment plate is provided with an A11 boss for supporting the end of the left end of the first left handrail vertical support sheet metal part. The lower plate of the A12 adjustment plate is provided with an A12 boss for supporting the end of the left end of the second left handrail vertical support sheet metal part. The A1 adjustment component is installed movably along the depth direction of the A1 cavity. The left two ends of the sheet metal parts of the first and second left handrail vertical brackets enclose each other to form the A2 cavity. The second left clamping unit also includes an A2 adjustment component for penetrating into the A2 cavity. The A2 adjustment component is used to limit the size of the gap d12, which is the distance between the bottom of the groove at the left two ends of the first and second left handrail vertical brackets and the bottom of the groove at the left two ends of the second left handrail vertical brackets. The A2 adjustment component includes an A21 adjustment plate and an A22 adjustment plate arranged opposite to each other. The upper plate of the A21 adjustment plate is provided with an A21 boss for supporting the ends of the left two left handrail vertical brackets. The lower plate of the A22 adjustment plate is provided with an A22 boss for supporting the ends of the left two left handrail vertical brackets. The A2 adjustment component is installed movably along the depth direction of the A2 cavity. The fixture base is equipped with an A12 drive unit, which is a horizontally arranged pneumatic or electric cylinder. An A12 mounting bracket is mounted on the A12 drive unit, and an A1 adjustment component is mounted on the A12 mounting bracket. The fixture base is also equipped with an A22 drive unit, which is a horizontally arranged pneumatic or electric cylinder. An A22 mounting bracket is mounted on the A22 drive unit, and an A2 adjustment component is mounted on the A22 mounting bracket. The left third clamping unit includes a horizontally arranged A pin, which is inserted into the A hole from the A gap for assembly and positioning. The length direction of the A pin is consistent with the A direction and is installed along the A direction, which is the direction from the A gap to the A hole. The clamp base is equipped with an A3 drive component, which is a horizontally arranged cylinder or electric cylinder. The A3 drive component is equipped with an A3 mounting bracket, and the A pin is installed on the A3 mounting bracket. The A3 drive component is located on the lower side of the sheet metal part of the left second handrail vertical support. The structures of the left clamping part and the right clamping part are identical.

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