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CN-117021030-B - Front auxiliary frame bushing press-fitting device and press-fitting process

CN117021030BCN 117021030 BCN117021030 BCN 117021030BCN-117021030-B

Abstract

The invention discloses a front auxiliary frame bushing press-fitting device and a press-fitting process, and relates to the field of front auxiliary frame assemblies of automobiles, wherein the front auxiliary frame bushing press-fitting device comprises a workbench, a plurality of auxiliary positioning blocks are fixed on the workbench and used for supporting a front auxiliary frame, and servo press fixing seats are arranged on the workbench between the auxiliary positioning blocks and used for installing a servo press; the servo press fixing seat between the servo press and the product stop block is provided with a sliding connecting seat, a pressure head of the servo press exposes the servo press fixing seat and pushes the sliding connecting seat along the axial direction, so that a lining pressure head fixedly arranged on the sliding connecting seat compresses the lining and the sleeve. The invention solves the problem that the force and the speed are uncontrollable in the press fitting process, ensures the coaxiality of press fitting and improves the quality of press fitting products.

Inventors

  • WANG YUELIU
  • HE LEI
  • LU LIQIN
  • LI TIANYIN
  • ZHANG HUOLIANG
  • WANG JIANYING

Assignees

  • 浙江万向系统有限公司
  • 万向集团公司

Dates

Publication Date
20260505
Application Date
20230728

Claims (9)

  1. 1. A front auxiliary frame bushing press-fitting device is characterized by comprising a workbench (1), wherein a plurality of auxiliary positioning blocks (2) are fixed on the workbench (1) and used for supporting a front auxiliary frame (14), a servo press fixing seat (5) is arranged on the workbench (1) between the auxiliary positioning blocks (2) and used for installing a servo press (4), a product stop block (9) is arranged on one side, away from the servo press (4), of the servo press fixing seat (5), an error-proofing guide head (8) is penetrated on the product stop block (9) in a relatively sliding manner, the error-proofing guide head (8) driven by a positioning cylinder (13) is used for being inserted into a sleeve (15) of the front auxiliary frame (14) to realize positioning, the error-proofing guide head (8) is also used for coaxially sleeving a sleeve (16), a sliding connecting seat (6) is arranged on the servo press fixing seat (5) between the servo press (4) and the product stop block (9), and a pressing head of the servo press (4) is exposed out of the servo press fixing seat (5) and used for pushing the sliding connecting seat (6) along the axial direction so that the pressing head (7) fixedly arranged on the sliding connecting seat (6) tightly presses the sleeve (16) and the sleeve (15); and a positioning rod (18) is arranged on one side, facing the sliding connecting seat (6), of the error-proof guide head (8) and is used for being inserted into a central hole (21) of the bushing (16) so as to realize the coaxial positioning of the bushing (16) and the error-proof guide head (8).
  2. 2. The front auxiliary frame bushing press-fitting device according to claim 1, wherein the servo press fixing seat (5) is provided with a linear guide rail (3) along the axial direction of the servo press (4), and the sliding connecting seat (6) is slidably arranged on the linear guide rail (3) through a sliding block.
  3. 3. The front auxiliary frame bushing press-fitting device of claim 1, wherein a positioning bracket (12) is arranged on one side of the product stop block (9) away from the sliding connecting seat (6) and used for installing a positioning air cylinder (13), a connecting block (10) is fixedly arranged on one side of the error-proof guide head (8) away from the sliding connecting seat (6), and a piston rod of the positioning air cylinder (13) is connected through the connecting block (10) to drive the error-proof guide head (8).
  4. 4. The front auxiliary frame bushing press-fitting device according to claim 3, wherein the connecting block (10) is provided with a guide rod (11), and the guide rod (11) is slidably mounted on the positioning bracket (12) to guide the error-proof guide head (8).
  5. 5. The front auxiliary frame bushing press-fitting device according to claim 1, wherein the error-proofing guide head (8) is further provided with an error-proofing protrusion (19) on one side facing the sliding connecting seat (6) for being matched with a notch (17) on the bushing (16) to realize error-proofing positioning.
  6. 6. The front subframe lining press-fitting device according to claim 1, wherein a conical surface (20) is arranged on the side, facing the sliding connection seat (6), of the error-proofing guide head (8), and the conical surface (20) is used for guiding the error-proofing guide head (8) into the sleeve (15).
  7. 7. A front subframe bushing press-fitting process, adopting the front subframe bushing press-fitting device as recited in any one of claims 1 to 6, characterized by comprising the steps of: firstly, placing a front auxiliary frame (14) on an auxiliary positioning block (2) to enable the front auxiliary frame (14) to be initially positioned; starting a positioning cylinder (13) to drive an error-proof guide head (8) so that the error-proof guide head (8) is inserted into a sleeve (15) to precisely position a front auxiliary frame (14); Step three, sleeving a bushing (16) on a positioning rod (18) of the error-proof guide head (8) penetrating through the sleeve (15) by an operator to realize coaxial positioning of the sleeve (15) and the bushing (16); Starting a servo press (4), pushing a sliding connecting seat (6) by a pressure head of the servo press (4), driving a bushing pressure head (7) to press a bushing (16) into a sleeve (15), measuring force and displacement data in the pressing process in real time by the servo press (4), drawing a pressing data graph, and outputting the pressing data graph to a control end; and fifthly, after the pressing is in place, the positioning cylinder (13) and the servo press (4) automatically retract, and the control end compares the press-fit data graph obtained in the fourth step with preset parameters to judge the qualification and finish the press-fit.
  8. 8. The pressing process for the front auxiliary frame bushing according to claim 7, wherein in the third step, when the bushing (16) is installed, the notch (17) of the bushing (16) is aligned with the error-proof bulge (19) of the error-proof guide head (8), so as to realize error-proof positioning.
  9. 9. The press-fitting process for the front subframe lining according to claim 7 or 8, wherein in the fifth step, if the press-fitting data graph meets the preset parameter requirement, the control end sends a green light signal, the operator takes down the front subframe (14) which is qualified in press-fitting and places the front subframe in the subsequent flow line, and if the press-fitting data graph does not meet the preset parameter requirement, the control end sends a red light signal, and the operator takes down the front subframe (14) which is unqualified in press-fitting and places the front subframe in the flow line of unqualified products.

Description

Front auxiliary frame bushing press-fitting device and press-fitting process Technical Field The invention relates to the field of automobile front auxiliary frame assemblies, in particular to a front auxiliary frame bushing press-fitting device and a press-fitting process. Background The front auxiliary frame bushing plays a role in preventing vibration and impact load and buffering chassis impact in the front auxiliary frame of the automobile. Meanwhile, the auxiliary effect on the comfort and noise control of the automobile is also achieved, and therefore the quality of the front auxiliary frame of the automobile is directly affected by the requirement on the dimensional accuracy of the press-fit of the bushing. At present, domestic manufacturers press the bushings by a hard hydraulic hard extrusion method, the press-mounting speed is generally high, no force or displacement monitoring exists, the placement of the bushings is also manual, and the concentricity is not high. Thus, the following drawbacks exist: 1. The hydraulic pressing-in speed is uncontrollable, so that the inside of the bushing is easily damaged, and the service life of the bushing is influenced; 2. because the pressing-in process has no force and displacement monitoring function, the damage inside the bushing cannot be monitored; 3. The bush is mostly placed by hand, can't accomplish concentricity, often can cause the bush side cut damage. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a front auxiliary frame bushing press-fitting device and a press-fitting process, which solve the problem that the force and the speed are uncontrollable in the press-fitting process, ensure the press-fitting coaxiality and improve the quality of press-fitting products. The front auxiliary frame bushing press-mounting device comprises a workbench, a plurality of auxiliary positioning blocks are fixed on the workbench and used for supporting a front auxiliary frame, a servo press fixing seat is arranged on the workbench between the auxiliary positioning blocks and used for mounting a servo press, a product stop block is arranged on one side, away from the servo press, of the servo press fixing seat, an error-proof guide head is arranged on the product stop block in a penetrating manner in a relatively sliding manner, the error-proof guide head driven by a positioning cylinder is used for being inserted into a sleeve of the front auxiliary frame to realize positioning, the error-proof guide head is also used for coaxially sleeving a bushing, a sliding connecting seat is arranged on the servo press fixing seat between the servo press and the product stop block in a relatively sliding manner, and a pressure head of the servo press exposes out of the servo press fixing seat and is used for pushing the sliding connecting seat in the axial direction, so that a bushing press head fixedly arranged on the sliding connecting seat compresses the bushing with the sleeve. As a further technical scheme, the servo press fixing seat is provided with a linear guide rail along the axial direction of the servo press, and the sliding connecting seat is slidably arranged on the linear guide rail through a sliding block. As a further technical scheme, one side of product dog deviates from the sliding connection seat and sets up the locating support for install the location cylinder, mistake proofing direction head deviates from the sliding connection seat one side fixedly and is equipped with the connecting block, and the piston rod of location cylinder passes through the connecting block and connects the drive mistake proofing direction head. As a further technical scheme, set up the guide bar on the connecting block, guide bar slidable mounting is on the locating support, leads mistake proofing direction head. As a further technical scheme, the positioning rod is arranged on one side, facing the sliding connecting seat, of the error-proof guide head and is used for being inserted into the central hole of the bushing, so that the bushing and the error-proof guide head are coaxially positioned. As a further technical scheme, the error-proof guide head is further provided with an error-proof bulge on one side facing the sliding connecting seat, and the error-proof bulge is used for being matched with a notch on the bushing to realize error-proof positioning. As a further technical scheme, the error-proof guide head is provided with a conical surface towards one side of the sliding connecting seat, and the conical surface is used for guiding the error-proof guide head into the sleeve. The front auxiliary frame bushing press-fitting technology adopts the front auxiliary frame bushing press-fitting device and comprises the following steps: Placing a front auxiliary frame on an auxiliary positioning block to enable the front auxiliary frame to be initially positioned; starting a positioning cylinder to drive an error-proof guide he