CN113275844B

CN113275844B - Manufacturing process of lower arm to be bent and auxiliary tool thereof

Info

Publication number: CN113275844B
Application number: CN202110644736.2A
Authority: CN
Inventors: 王小锋; 章代红; 张勇; 厉晓明
Original assignee: Shenzhen Koncoil Technology Co ltd
Current assignee: Shenzhen Koncoil Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-05-31
Anticipated expiration: 2041-06-09
Also published as: CN113275844A

Abstract

The application relates to a manufacturing process of a bent lower arm and an auxiliary tool thereof, which comprises the following steps: blanking the metal plate according to the processing specification; bending the reinforcing ribs and the shell and integrally assembling and welding the reinforcing ribs and the shell; bending the supporting plate, the wire protecting plate and the end cover, and sequentially assembling and welding the supporting plate, the wire protecting plate and the end cover with the shell integrally to form a shell; polishing the welding joints; correcting the overall size of the outer shell; processing concentric holes on the end cover; placing the shell into an auxiliary tool, installing and positioning the shaft sleeve, and integrally welding the shaft sleeve and the end cover to form a lower arm; electroplating an anticorrosive layer on the surface of the lower arm and spraying a protective layer; calibrating the whole size of the lower arm, cleaning the surface and packaging. The staff hinders the welding completion back in proper order with the shell body, in packing into auxiliary fixtures with the shell body, two axle sleeves are gone into in the installation to fix two axle sleeve location on auxiliary fixtures, weld axle sleeve and end cover again, prevent effectively that the end cover warp and cause the axle sleeve circumstances of deflecting in welding process, this application has the effect that has improved the machining precision of underarm.

Description

Manufacturing process of lower arm to be bent and auxiliary tool thereof

Technical Field

The application relates to the field of machining, in particular to a manufacturing process of a bent lower arm and an auxiliary tool of the manufacturing process.

Background

An X-ray diagnostic device is a medical scientific research instrument used in the fields of basic medicine and clinical medicine, and a camera on the X-ray diagnostic device is generally arranged on a base of a device main body through a rotatable arm.

The common mechanical arm comprises a shell body and shaft sleeves, wherein the shaft sleeves are used for being hinged to the two ends of the shell body, and the shell body is composed of a shell, a supporting plate, a wire protecting plate, reinforcing ribs and end covers connected to the two ends of the shell. The shell is bent and formed into a U shape with an opening at one side, and the reinforcing ribs, the supporting plate and the wire protecting plate are sequentially overlapped and installed in the opening of the shell. After the outer shell needs to transversely penetrate through the outer shell on the end covers at two ends to be punched, the shaft sleeve transversely penetrates into a hole drilled in the end cover, and then the shaft sleeve and the outer shell are welded and fixed. The outer shell of the arm is manufactured by machining, each part is manufactured step by step after blanking, drilling and bending, and each part is welded into a whole. The housing needs to rotate around the axis of the shaft sleeve, so that the concentricity between every two holes for the shaft sleeves to pass through on the housing and the parallelism of the axes of the two shaft sleeves need to be very accurate.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the shell body is with the axle sleeve welding in-process, and the shell body takes place to warp easily when high fever for the depth of parallelism between the axle sleeve at shell body both ends changes easily, and the machining precision is not high.

Disclosure of Invention

In order to improve the processing installation of axle sleeve on the arm, this application provides a manufacturing process of underarm of bending and auxiliary fixtures thereof.

In a first aspect, the application provides a manufacturing process of a lower arm to be bent, which adopts the following technical scheme:

a manufacturing process of a bent lower arm comprises the following steps:

s1, blanking the metal plate according to the processing specification;

s2, bending the reinforcing ribs and the shell, and integrally assembling and welding the reinforcing ribs and the shell;

s3, bending the support plate, the wire protection plate and the end cover, and sequentially assembling and welding the support plate, the wire protection plate, the end cover and the shell into a shell body;

s4, polishing the welded joints to be flat and smooth;

s5, calibrating the overall size of the outer shell, and correcting the lofting error of the lower arm and the distortion error in the welding process;

s6, processing concentric holes on the end covers;

s7, placing the outer shell into an auxiliary tool, installing and positioning the shaft sleeve, and then integrally welding the shaft sleeve and the end cover to form a lower arm;

s8, electroplating an anticorrosive layer on the surface of the lower arm;

s9, spraying a protective layer on the surface of the lower arm;

and S10, calibrating the overall size of the lower arm, cleaning the surface, and packaging according to the packaging operation requirement.

Through adopting above-mentioned technical scheme, the staff hinders the casing in proper order and welds the completion back, the whole size of calibration shell body, ensure that shell body size is correct, pack the casing into auxiliary fixtures again in, two axle sleeves are gone into in the installation, and fix a position two axle sleeves on auxiliary fixtures, weld axle sleeve and end cover again, prevent effectively that the end cover warp in welding process and cause the axle sleeve to deflect the condition, the axis depth of parallelism of both ends axle sleeve on having improved the underarm, it is smooth and easy to make the underarm rotate, the machining precision of underarm has been improved.

The utility model provides a manufacturing of underarm is with auxiliary fixtures bends, adopts following technical scheme:

the utility model provides a underarm manufacturing of bending uses auxiliary fixtures, includes spacing box, the inside cavity of spacing box, set up the opening that supplies the shell body to put into on the spacing box, the opening orientation of spacing box is parallel with the opening orientation of shell body, set up on the lateral wall of spacing box and correspond and supply the perforation that the axle sleeve penetrated with the end cover punchhole, the both sides lateral wall that runs through spacing box is perforated, be provided with the positioner who is used for the location axle sleeve on the spacing box.

Through adopting the above technical scheme, when the staff uses auxiliary fixtures to carry out spacing fixed to two axle sleeves on the shell body, put into spacing box with the shell body, and manual regulation shell body position, the punchhole that makes both ends end cover on the shell body aligns the perforation on the spacing box, penetrate the axle sleeve in to the perforation again, make the axle sleeve coaxial insert in the punchhole on the end cover, reuse positioner with axle sleeve fixed connection on spacing box, can keep the depth of parallelism between two axle sleeves at staff's welding end cover and axle sleeve, improve axle sleeve installation accuracy.

Optionally, the positioning device comprises an insertion rod, the outer diameter of the insertion rod is consistent with the inner diameter of the shaft sleeve, the length of the insertion rod is larger than the depth of the through hole in the limiting box, a pull rod is fixedly connected to one end of the insertion rod, and one end of the pull rod, which is close to the insertion rod, is used for being abutted to the outer wall of the limiting box.

Through adopting above-mentioned technical scheme, when the staff fixes a position the axle sleeve on the external shell body, put into spacing box with the shell body, insert the inserted bar from the perforation on the shell body again, make the inserted bar peg graft in the axle sleeve to make the pull rod butt on the outer wall of spacing box, thereby fix the axle sleeve on spacing box, improve the accuracy when the axle sleeve welds.

Optionally, a step is further disposed between the insertion rod and the pull rod, the outer diameter of the step is larger than that of the insertion rod, the outer diameter of the step is not larger than the diameter of the through hole, and the thickness of the step is consistent with the depth of the through hole.

Through adopting above-mentioned technical scheme, in inserting the axle sleeve with the inserted bar to when making the pull rod butt on the outer wall of spacing box, make simultaneously the step joint between inserted bar and the pull rod in the perforation on spacing box, ensure to push into spacing box with the axle sleeve from the perforation department on the spacing box, and can effectively restrict the inserted bar and move about in perforating, further improve the spacing fixed action of inserted bar to the axle sleeve, improve axle sleeve installation accuracy.

Optionally, a first movable hole is formed in the side wall of the limiting cassette tape with a through hole, a first butt plate is installed in the first movable hole in a sliding mode along the axial direction of the shaft sleeve, the first butt plate is symmetrically arranged on two sides of the limiting cassette, the first butt plate is used for butting against the side wall of the outer shell, and a driving device used for driving the first butt plates on the two sides to move in a reverse direction is arranged on the limiting cassette.

Through adopting above-mentioned technical scheme, after the spacing box was put into to the shell body, the staff ordered about the first butt board of spacing box both sides through operation drive arrangement and was close to in step, made two first butt board centre gripping in the both sides of shell body to when the shell body was the offset in the protection box, promote the shell body and put in the middle in the protection box, carry out axle sleeve installation and weldment work again, can effectively improve the installation accuracy of underarm.

Optionally, the driving device comprises a bidirectional screw and a threaded sleeve, the first abutting plate is fixedly connected with the threaded sleeve, the threaded sleeve is in threaded connection with the bidirectional screw, and a rotating assembly used for rotating the bidirectional screw is arranged on the limiting box.

Through adopting above-mentioned technical scheme, the staff passes through the rotatory two-way screw rod of runner assembly, and two-way screw rod rotates the in-process, through with the transmission of the screw sleeve screw thread on the first butt board, orders about two first butt boards and be close to in step to with the shell body centre gripping between two parties in spacing box, convenient operation.

Optionally, the rotating assembly comprises a second abutting plate, a rack, a gear and a first elastic piece, a second movable hole is formed in the bottom wall of the limiting box, the second abutting plate is slidably mounted in the limiting box along the opening of the limiting box, the first elastic piece is arranged on the limiting box, the first elastic piece is used for driving the second abutting plate to move towards the opening of the limiting box, the gear is fixedly connected with the two-way screw rod in a coaxial mode, the rack is fixedly connected to the second abutting plate, and the axis of the two-way screw rod perpendicular to the rack is arranged on one side of the gear and meshed with the gear.

Through adopting above-mentioned technical scheme, when the staff put into spacing box with the shell body in, the second butt board contact in shell body and the spacing box to promote the second butt board and overcome first elastic component elasticity and remove to spacing box bottom portion, the second butt board removes the in-process, through gear engagement transmission on rack and the two-way screw rod on the second butt board, thereby drive two first butt boards on the spacing box and be close to and the centre gripping shell body in step, make shell body convenient operation placed in the middle.

Optionally, a limiting assembly for limiting the movement of the second abutting plate when the second abutting plate is located in the second movable hole and flush with the inner bottom wall of the limiting box is arranged on the limiting box.

Through adopting above-mentioned technical scheme, when the second butt board removed to the inner diapire parallel and level with spacing box, two first butt board centre gripping shells body placed in the middle in spacing box to after first butt board with the shell body centre gripping placed in the middle, through spacing subassembly to the spacing fixed of second butt board, can prevent effectively that second butt board from going up the bullet reset under first elastic component spring action, improve the location accuracy to the casing.

Optionally, the limiting assembly comprises a clamping block and a second elastic part, the clamping block is horizontally connected to the bottom wall of the limiting box in a sliding mode, a positioning block is fixedly arranged on the bottom wall of the second abutting plate, a clamping groove for inserting the clamping block is formed in the side wall of the positioning block, the clamping block is close to the end face of the positioning block and close to the edge of the limiting box, the clamping block is arranged as a guide face, and the second elastic part is arranged on the limiting box and used for driving the clamping block to be close to the positioning block.

Through adopting above-mentioned technical scheme, in second butt board to spacing boxed section removal in-process, the locating piece earlier with fixture block on the spigot surface sliding contact to promote the fixture block to overcome second elastic component elasticity and remove, when second butt board remove to the inner diapire parallel and level with spacing box, draw-in groove on the locating piece aligns the fixture block, under second elastic component elasticity, promote the fixture block to remove and the joint goes into the draw-in groove on the locating piece, thereby to the spacing fixed of second butt board, the operation is convenient fast.

Optionally, the first abutting plate is connected with the threaded sleeve through a connecting rod, the connecting rod includes a horizontal rod parallel to the sliding direction of the first abutting plate, and the length of the horizontal rod along the sliding direction of the first abutting plate is adjustable.

Through adopting above-mentioned technical scheme, when putting into the shell body of different width and carrying out axle sleeve welding operation in spacing box, through adjusting the length of connecting rod horizontal pole on the first butt board for when second butt board remove to with spacing box inner wall parallel and level, the first butt board of both sides can be accurate promotes the shell body to between two parties in the spacing box, improves auxiliary fixtures's suitability.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after the outer shell is sequentially subjected to resistance welding, a worker puts the outer shell into an auxiliary tool, installs two shaft sleeves, positions and fixes the two shaft sleeves on the auxiliary tool, and then welds the shaft sleeves and the end covers, so that the deflection of the shaft sleeves caused by the deformation of the end covers in the welding process is effectively prevented, the axis parallelism of the shaft sleeves at two ends of the lower arm is improved, the lower arm rotates smoothly, and the processing precision of the lower arm is improved;

2. after the outer shell is placed in the limiting box, a worker drives the first abutting plates on the two sides of the limiting box to synchronously approach through operating the driving device, so that the two first abutting plates are clamped on the two sides of the outer shell, when the outer shell is offset in the protecting box, the outer shell is pushed to be centered in the protecting box, then shaft sleeve installation and welding work is carried out, and the installation accuracy of the lower arm can be effectively improved;

3. when the staff put the shell body into spacing box, the second butt board contact in shell body and the spacing box to promote the second butt board and overcome first elastic component elasticity and remove to spacing box bottom, the second butt board removes the in-process, through gear engagement transmission on rack and the two-way screw rod on the second butt board, thereby drive two first butt boards on the spacing box and be close to and the centre gripping shell body in step, make shell body convenient operation placed in the middle.

Drawings

Fig. 1 is a schematic view of the entire structure of a bent lower arm.

Fig. 2 is a schematic view of the entire structure of the bent lower arm from another view.

Fig. 3 is a schematic sectional plan view in the direction a-a in fig. 1.

Fig. 4 is a schematic view of the overall structure of embodiment 1 of the present application.

Fig. 5 is a schematic diagram of an explosive structure of embodiment 1 of the present application.

Fig. 6 is a schematic diagram of an explosive structure of embodiment 2 of the present application.

Fig. 7 is a schematic view of the overall structure of the insert rod of embodiment 2 of the present application.

Fig. 8 is a partially enlarged schematic view of a portion B in fig. 6.

Fig. 9 is a partial sectional structural view of another perspective of embodiment 2 of the present application.

Fig. 10 is a partially enlarged schematic view of a portion C in fig. 9.

Fig. 11 is a partially enlarged schematic view of a portion D in fig. 9.

Description of reference numerals: 1. an outer housing; 11. a housing; 12. a support plate; 13. a wire protecting plate; 14. reinforcing ribs; 15. an end cap; 16. a shaft sleeve; 17. an eyelet; 2. a limiting box; 21. perforating; 3. inserting a rod; 31. a pull rod; 32. a step; 4. a first butt joint plate; 41. a first movable hole; 42. a connecting rod; 421. a horizontal bar; 4211. an inner rod; 4212. an outer rod; 4213. tightly abutting against the bolt; 422. a vertical rod; 43. a first connecting frame; 44. a first guide bar; 5. a drive device; 51. a bidirectional screw; 52. a threaded sleeve; 53. a rotating assembly; 531. a second butt joint plate; 5311. a second link frame; 5312. a second guide bar; 532. a rack; 533. a gear; 534. a first elastic member; 535. a second movable hole; 54. a limiting component; 541. a clamping block; 542. a second elastic member; 543. positioning blocks; 544. a clamping groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-11.

The embodiment of the application discloses a manufacturing process of a lower arm to be bent. With reference to fig. 1, 2, 3, the method comprises the following steps:

and S1, blanking the metal plate according to the processing specification.

And S2, bending the reinforcing ribs 14 and the shell 11 by using a plate bending machine, correcting the U-shaped arc of the shell 11 by using a flattening die, and integrally assembling and welding the reinforcing ribs 14 and the shell 11 by argon arc welding.

And S3, bending the support plate 12, the wire protection plate 13 and the end cover 15 by a plate bending machine, and sequentially assembling and welding the support plate 12, the wire protection plate 13 and the end cover 15 with the shell 11 into the shell body 1.

And S4, polishing the welded joints to be flat and smooth.

And S5, calibrating the overall size of the outer shell 1, and correcting the lofting error of the lower arm and the distortion error in the welding process.

And S6, machining the end cover 15 by adopting a machine, and machining the hole 17 on the end cover 15 to ensure that the hole is a concentric hole.

S7, referring to FIGS. 3 and 4, the outer shell 1 is placed in the limiting box 2 in the auxiliary tool, the shaft sleeve 16 is installed, the shaft head and the limiting box 2 are fixedly connected through the inserted rod 3, and the shaft sleeve 16 and the end cover 15 are integrally welded to form the lower arm.

S8, electroplating an anticorrosive layer on the surface of the lower arm, wherein the anticorrosive layer can be environment-friendly colored zinc or can be directly galvanized.

And S9, spraying a protective layer on the surface of the lower arm, wherein the plastic spraying treatment is adopted in the embodiment.

The embodiment of the application discloses manufacturing of underarm of bending uses auxiliary fixtures.

Example 1

Referring to fig. 3 and 4, the auxiliary tool comprises a limiting box 2 and a positioning device for positioning the position of the shaft sleeve 16, the limiting box 2 is hollow, one side of the limiting box 2 is open, and the side, with the opening, of the limiting box 2 faces upwards when the auxiliary tool is used. The opening of spacing box 2 is used for putting into shell body 1, and the opening of shell 11 "U" shape on shell body 1 is placed towards the interior diapire of spacing box 2. The length direction of spacing box 2 is unanimous with shell body 1's length direction, spacing box 2 is on a parallel with on self length direction's the both sides outer wall all sets up the intercommunication and goes into spacing box 2 inside perforation 21 along self width direction, in this embodiment, two perforation 21 have been seted up on the lateral wall of spacing box 2 unilateral, two perforation 21 correspond with the punchhole 17 position on two end cover 15 on the shell body 1 respectively, and two liang of perforation 21 two liang of correspondences and coaxial of spacing box 2 both sides. The diameter of the bore 21 corresponds to the diameter of the sleeve 16.

Referring to fig. 4 and 5, in the present embodiment, the positioning device includes the insert rod 3. The diameter of the inserted rod 3 is consistent with the inner diameter of the shaft sleeve 16, and the length of the inserted rod 3 is larger than the wall thickness of the side wall of the limiting box 2 with the through hole 21. One end of the inserting rod 3 is also coaxially connected with a pull rod 31, and the diameter of the pull rod 31 is larger than that of the through hole 21 on the limiting box 2. After the outer shell 1 is placed in the limiting box 2, the shaft sleeves 16 are inserted into the two through holes 21 on one side of the limiting box 2, so that the shaft sleeves 16 simultaneously penetrate through the two holes on one side of the outer shell 1, and then the inserting rods 3 are respectively used for penetrating through the through holes 21 and being inserted into the shaft sleeves 16 on the outer shell 1 at the four through holes 21, so that the pull rod 31 abuts against the outer side of the limiting box 2, and the position of the shaft sleeves 16 on the limiting box 2 is fixed.

The implementation principle of the embodiment 1 is as follows: when the staff uses auxiliary fixtures to carry out spacing fixed to two axle sleeves 16 on the shell body 1, put into spacing box 2 with shell body 1 to manually adjust shell body 1 position, make the punchhole 17 of both ends end cover 15 on the shell body 1 align the perforation 21 on the spacing box 2. Then, the sleeve 16 is inserted into the through hole 21, the sleeve 16 is coaxially inserted into the hole 17 of the end cap 15, the insertion rod 3 is inserted from the through hole 21 of the outer housing 1, the insertion rod 3 is inserted into the sleeve 16, and the pull rod 31 abuts against the outer wall of the limit box 2, so that the sleeve 16 is fixed on the limit box 2. Therefore, parallelism between the two shaft sleeves 16 can be kept between the end cover 15 and the shaft sleeve 16 by welding of the working personnel, and the installation accuracy of the shaft sleeve 16 is improved.

Example 2

Referring to fig. 6, embodiment 2 differs from embodiment 1 in that: the difference of the structure of the inserted bar 3 and the limiting box 2 are provided with a centering mechanism for driving the outer shell 1 to be centered in the limiting box 2.

Referring to fig. 6 and 7, in this embodiment, a step 32 is further provided between the insertion rod 3 and the pull rod 31, the thickness of the step 32 should be no less than the wall thickness of the side of the limiting box 2 with the through hole 21, the major diameter of the step 32 should be greater than the inner diameter of the shaft sleeve 16 and no greater than the outer diameter of the shaft sleeve 16, and in this embodiment, the major diameter of the step 32 is consistent with the major diameter of the shaft sleeve 16 and the diameter of the through hole 21. When installing inserted bar 3, make step 32 joint go into in the perforation 21 on spacing box 2, can be when guaranteeing to push into spacing box 2 with axle sleeve 16, increase the spacing fixed action of inserted bar 3 to axle sleeve 16.

Referring to fig. 6 and 8, the centering mechanism includes two first butt joint plates 4, a first movable hole 41 is opened along the length direction of the limiting box 2 on the side wall of the limiting box 2 with the through hole 21, and the first butt joint plate 4 is connected with the limiting box 2 in a sliding manner along the opening direction of the first movable hole 41. Welded fastening has first link 43 on the outer wall of spacing box 2, and first butt joint board 4 is gone up to be had first guide bar 44 along self sliding direction welded fastening, and first guide bar 44 slides along first butt joint board 4 sliding direction and wears to establish on first link 43. All be equipped with the first butt joint board 4 of mutual symmetry on the both sides lateral wall of spacing box 2, be equipped with drive arrangement 5 on the spacing box 2 for order about two first butt joint boards 4 and be close to or keep away from in step.

In the present embodiment, the driving device 5 includes a bidirectional screw 51 and a threaded sleeve 52. The bidirectional screw 51 is installed on the bottom wall of the limiting box 2 along the width direction of the limiting box 2, and the bidirectional screw is rotatably connected with the limiting box 2. The number of the threaded sleeves 52 is two, the connecting rod 42 is welded on the first abutting plate 4, and one end, away from the first abutting plate 4, of the connecting rod 42 is welded and fixed with the threaded sleeve 52. The two threaded sleeves 52 correspond to the two first abutting plates 4, the two threaded sleeves 52 are sleeved on the two-way screw rod in a threaded manner, and the two threaded sleeves 52 are respectively positioned on the threads with opposite screwing directions on the two sides of the two-way screw rod.

In other embodiments, the driving device 5 may also be a bidirectional electric push rod, the bidirectional electric push rod is welded and fixed on the bottom wall of the limiting box 2, and push rods at two ends of the bidirectional electric push rod are respectively and fixedly connected with the two first abutting plates 4 through the connecting rod 42.

Referring to fig. 9 and 10, the limiting box 2 is provided with a rotating assembly 53 for rotating the bidirectional screw rod. In this embodiment, the rotating assembly 53 includes a second abutting plate 531, a rack 532, a gear 533, and a first elastic member 534. On the diapire of spacing box 2, correspond the position of the highest edge of shell 11 "U" shape opening on shell body 1, seted up the second activity hole 535 with the equal width of spacing box 2 inside width, second butt joint board 531 is located directly over second activity hole 535 along spacing box 2 direction of height, and the size is unanimous with second activity hole 535 size. A second connecting frame 5311 is fixedly welded on the bottom wall of the second abutting plate 531, a second guide rod 5312 is fixedly welded on the bottom wall of the second abutting plate 531 vertically, and the second guide rod 5312 penetrates through the second connecting frame 5311 in a sliding manner along the moving direction of the second abutting plate 531.

The rack 532 is vertically welded and fixed on the bottom wall of the second abutting plate 531, the gear 533 is coaxially and fixedly sleeved on the bidirectional screw 51, and the gear 533 is meshed with the rack 532. When the second contact plate 531 is lifted, the gear 533 and the bidirectional screw 51 are driven to rotate. In this embodiment, the first elastic member 534 is a first spring, one end of the first spring is welded and fixed on the second connecting frame, and the other end abuts against the bottom wall of the second abutting plate 531. The first spring is used to drive the second abutting plate 531 to rise upward.

In other embodiments, the rotating assembly 53 may also be a handle, one end of the handle is welded to the bidirectional screw 51, and the worker rotates the handle to drive the bidirectional screw 51 to rotate.

Referring to fig. 9 and 11, in order to fix the second abutting plate 531 at a limited position when the second abutting plate 531 is lowered to make the top wall flush with the bottom wall of the limiting box 2, a limiting component 54 for limiting the movement of the second abutting plate 531 is further provided at the bottom of the limiting box 2. In this embodiment, the position limiting assembly 54 includes a latch 541 and a second elastic member 542. A positioning block 543 is welded and fixed on the bottom wall of the second abutting plate 531, and a clamping groove 544 with the same size as the clamping block 541 is formed on the side wall of the positioning block 543. The latching block 541 is horizontally connected to the bottom wall of the position limiting box 2 in a sliding manner, and when the top wall of the second abutting plate 531 is flush with the inner bottom wall of the position limiting box 2, the latching block 541 is aligned with the latching groove 544 on the positioning block 543.

The fixture block 541 is horizontally slidably mounted on the bottom wall of the second abutting plate 531, an end face of the fixture block 541 close to the positioning block 543 and an edge close to the second abutting plate 531 are provided with guide surfaces, the second elastic element 542 adopts a second spring, one end of the second spring is welded and fixed on the bottom wall of the limiting box 2, and the other end of the second spring is welded and fixed with the end face of the fixture block 541 far from the positioning block 543. The second spring is used for pushing the fixture block 541 to approach the positioning block 543 and pushing the fixture block 541 to be clamped into the clamping slot 544 when the fixture block 541 is aligned with the clamping slot 544.

Referring to fig. 6 and 8, in order that when the second abutting plate 531 is flush with the bottom wall of the spacing box 2, the two first abutting plates 4 can just push the outer shell 1 to be centered in the spacing box 2, the connecting rod 42 on the back of the first abutting plate 4 comprises a horizontal rod 421 and a vertical rod 422, and the horizontal rod 421 is composed of an inner rod 4211 and an outer rod 4212 which are coaxially slidably arranged. One end of the vertical rod 422 is connected with the threaded sleeve 52, the other end of the vertical rod 422 is vertically and fixedly connected with the end part of the outer rod 4212 of the horizontal rod 421, the inner rod 4211 penetrates through one end of the outer rod 4212 far away from the vertical rod 422, and one end of the inner rod 4211 far away from the outer rod 4212 is fixedly welded with the first butt joint plate 4. The side wall of the outer rod 4212 is radially provided with a screw hole communicated with the inside of the outer rod 4212 along the outer rod 4212, a tightening bolt 4213 is connected in the screw hole in a threaded manner, the tightening bolt 4213 is screwed and abutted to the outer wall of the inner rod 4211, so that the inner rod 4211 and the outer rod 4212 are limited and fixed, and the distance of the first abutting plate 4 extending into the limiting box 2 is changed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The manufacturing process of the bent lower arm is characterized in that: the method comprises the following steps:

s1, blanking the metal plate according to the processing specification;

s2, bending the reinforcing ribs (14) and the shell (11), and integrally assembling and welding the reinforcing ribs (14) and the shell (11) for molding;

s3, bending the support plate (12), the wire protecting plate (13) and the end cover (15), and sequentially assembling and welding the support plate (12), the wire protecting plate (13) and the end cover (15) with the shell (11) into the shell body (1);

s4, polishing the welded joints to be flat and smooth;

s5, calibrating the overall size of the outer shell (1), and correcting the lofting error of the lower arm and the distortion error in the welding process;

s6, processing concentric holes on the end cover (15);

s7, placing the outer shell (1) into an auxiliary tool, installing and positioning the shaft sleeve (16), and then integrally welding the shaft sleeve (16) and the end cover (15) to form a lower arm;

s8, electroplating an anticorrosive layer on the surface of the lower arm;

s9, spraying a protective layer on the surface of the lower arm;

s10, calibrating the overall size of the lower arm, cleaning the surface, and packaging according to the packaging operation requirement;

wherein, auxiliary fixtures, its characterized in that: including spacing box (2), the inside cavity of spacing box (2), set up the opening that supplies shell body (1) to put into on spacing box (2), the opening orientation of spacing box (2) is parallel with the opening orientation of shell body (1), set up perforation (21) that correspond and supply axle sleeve (16) to penetrate with punchhole (17) on end cover (15) on the lateral wall of spacing box (2), perforation (21) run through the both sides lateral wall of spacing box (2), be provided with the positioner who is used for fixing a position axle sleeve (16) on spacing box (2).

2. The auxiliary tool for manufacturing the bent lower arm according to claim 1, wherein: positioner includes inserted bar (3), the external diameter of inserted bar (3) is unanimous with the internal diameter size of axle sleeve (16), the length of inserted bar (3) is greater than the degree of depth of perforating (21) on spacing box (2), the one end rigid coupling of inserted bar (3) has pull rod (31), pull rod (31) are close to the one end of inserted bar (3) and are used for with the outer wall butt of spacing box (2).

3. The auxiliary tool for manufacturing the bent lower arm according to claim 2, wherein: still be provided with step (32) between inserted bar (3) and pull rod (31), the external diameter of step (32) is greater than the external diameter of inserted bar (3), the external diameter of step (32) is not more than the diameter of perforation (21), the thickness of step (32) is unanimous with the degree of depth size of perforation (21).

4. The auxiliary tool for manufacturing the bent lower arm according to claim 1, wherein: spacing box (2) have seted up first movable hole (41) on the lateral wall of perforation (21), slide along the axial of axle sleeve (16) in first movable hole (41) and install first butt joint board (4), first butt joint board (4) symmetry sets up the both sides at spacing box (2), first butt joint board (4) are used for the butt on the lateral wall of shell body (1), be provided with drive arrangement (5) that are used for driving about the first butt joint board (4) synchronous reverse motion in both sides on spacing box (2).

5. The auxiliary tool for manufacturing the bent lower arm according to claim 4, wherein: the driving device (5) comprises a bidirectional screw (51) and a threaded sleeve (52), the first abutting plate (4) is provided with the threaded sleeve (52) and the threaded sleeve (52) which are connected with each other in a fixed mode, the threaded sleeve (52) is in threaded connection with the bidirectional screw (51), and a rotating assembly (53) used for rotating the bidirectional screw (51) is arranged on the limiting box (2).

6. The auxiliary tool for manufacturing the bent lower arm according to claim 5, wherein: the rotating assembly (53) comprises a second abutting plate (531), a rack (532), a gear (533) and a first elastic piece (534), a second movable hole (535) is formed in the bottom wall of the limiting box (2), the second abutting plate (531) is slidably mounted in the limiting box (2) along the opening of the limiting box (2), the first elastic piece (534) is arranged on the limiting box (2), the first elastic piece (534) is used for driving the second abutting plate (531) to move towards the opening of the limiting box (2), the gear (533) is coaxially and fixedly connected with the bidirectional screw (51), the rack (532) is fixedly connected onto the second abutting plate (531), and the axis of the rack (532) perpendicular to the bidirectional screw (51) is arranged on one side of the gear (533) and meshed with the gear (533).

7. The auxiliary tool for manufacturing the bent lower arm according to claim 6, wherein: and the limiting box (2) is provided with a limiting component (54) for limiting the movement of the second abutting plate (531) when the second abutting plate (531) is positioned in the second movable hole (535) and is flush with the inner bottom wall of the limiting box (2).

8. The auxiliary tool for manufacturing the bent lower arm according to claim 7, wherein: the limiting assembly (54) comprises a clamping block (541) and a second elastic piece (542), the clamping block (541) is horizontally connected to the bottom wall of the limiting box (2) in a sliding mode, a positioning block (543) is fixedly arranged on the bottom wall of the second abutting plate (531), a clamping groove (544) for inserting the clamping block (541) is formed in the side wall of the positioning block (543), the end face, close to the positioning block (543), of the clamping block (541) is arranged on the edge, close to the limiting box (2), of the clamping block to form a guide surface, and the second elastic piece (542) is arranged on the limiting box (2) and used for driving the clamping block (541) to be close to the positioning block (543).

9. The auxiliary tool for manufacturing the lower arm to be bent as claimed in any one of claims 6 to 8, wherein: the first abutting plate (4) is connected with the threaded sleeve (52) through a connecting rod (42), the connecting rod (42) comprises a horizontal rod (421) parallel to the sliding direction of the first abutting plate (4), and the length of the horizontal rod (421) along the sliding direction of the first abutting plate (4) is adjustable.