Fixing clamp for auxiliary frame machining

Abstract

The utility model is applicable to the field of machining fixture equipment, and provides a fixing fixture for auxiliary frame machining, which comprises a fixture side plate, and two side movable limiting units, two side positioning units, two bottom pressing units and two bottom positioning units are arranged on the fixture side plate in bilateral symmetry. The side movable limiting unit is close to the auxiliary frame from the side face of the auxiliary frame by driving a movable limiting block and has the two functions of limiting a side structural column of the auxiliary frame and detecting whether the position of the structural column meets the design requirement or not, and the side positioning unit is matched with the movable limiting block from the back of a workshop to achieve limiting. The bottom pressing unit is matched with the bottom positioning unit to press the lower portion of the auxiliary frame, meanwhile, a workpiece back supporting block is arranged on the back of the machining position of the auxiliary frame so as to prevent the situation that the positions deform due to stress in the machining process, and a workpiece pre-installation positioning shaft is arranged to be used for rapid positioning when the automobile auxiliary frame is installed.

Description

Technical Field

[0001] The utility model is applicable to the field of machining fixture equipment and provides a fixing fixture for machining a sub-frame. Background Art

[0002] As an important part of the automobile frame, the automobile subframe is generally made of steel through stamping, welding, machine tool processing and other steps. Since the subframe needs to remain in a fixed state during processing to facilitate equipment processing, the subframe is generally fixed to a special fixture first, and then local processing such as punching and cutting is performed. However, since machine tools and other equipment will exert great pressure on the subframe body when processing the subframe, the subframe is easily deformed or misaligned during the processing of general fixtures. A fixed fixture with more precise positioning and more sufficient limit support is needed to improve the processing efficiency and quality of the subframe. Utility Model Content

[0003] To this end, the utility model provides a fixing fixture for processing a sub-frame, which realizes stable limiting of the sub-frame through a plurality of symmetrically arranged fixture units, wherein the bottom clamping unit and the bottom positioning unit realize the clamping of the bottom of the sub-frame, while the side movable limiting unit and the side positioning unit simultaneously have two functions of limiting the side structural column of the sub-frame and detecting whether the position of the structural column meets the design requirements. At the same time, a workpiece back support block is arranged at the back of the processing position of the sub-frame to prevent these positions from being subjected to stress and deformation during the processing process.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixing fixture for subframe processing, including a fixture side plate, on which two side movable limit units, two side positioning units, two bottom clamping units and two bottom positioning units are symmetrically arranged; the side movable limit units include side limit bases, movable limit blocks and limit block driving devices, the movable limit blocks are slidably connected to the side limit bases, the limit block driving devices are drivingly connected to the movable limit blocks, the side positioning units include side support sleeves, the side support sleeves are arranged facing the direction of the movable limit blocks, the bottom clamping units include bottom clamping blocks and clamping block driving devices, the bottom positioning units include bottom positioning shafts, and the bottom clamping blocks are provided with bottom positioning holes matched with the bottom positioning shafts; the fixture side plates are fixedly provided with a plurality of workpiece back support blocks and a plurality of workpiece pre-installed positioning shafts.

[0005] Furthermore, the side plate of the clamp is also fixedly provided with a pre-compression unit, and the aforementioned pre-compression unit includes a pre-compression driving device, a back pre-compression block and a front pre-compression block. The aforementioned pre-compression driving device and the back pre-compression block are fixedly provided on the side plate of the clamp, the aforementioned pre-compression driving device is drivingly connected to the front pre-compression block, and the aforementioned front pre-compression block is arranged facing the direction of the back pre-compression block.

[0006] Furthermore, the side movable limit unit also includes a proximity switch assembly electrically connected to the limit block driving device, the proximity switch assembly includes a detection rod and two proximity switch sensors, the detection rod is fixedly connected to the movable limit block, the two proximity switch sensors are fixedly connected to the side limit base, and the detection rod can be detected by the two proximity switch sensors respectively during the movement of the movable limit block.

[0007] Furthermore, the side positioning unit also includes a positioning shaft driving cylinder, the side support sleeve sliding sleeve is provided with a side positioning shaft, the positioning shaft driving cylinder is drivingly connected to the side positioning shaft, and the movable limit block is provided with a side positioning hole adapted to the side positioning shaft.

[0008] Furthermore, the side positioning unit also includes a reset elastic member, one end of which is fixedly connected to the side positioning shaft, and the other end of which is fixedly connected to the telescopic portion of the positioning shaft driving cylinder.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. In the solution of the utility model, the movable limit blocks of the two side positioning units are moved from the side of the sub-frame to be assembled with the side structural columns of the sub-frame, and at the same time, the side support sleeves of the side positioning units are cooperated to complete the limitation of the side structural columns of the sub-frame. This way of entering from the side can make the installation space of the sub-frame larger, and the sub-frame can be installed on the fixture more quickly;

[0011] 2. By passing the side locating shaft through the hole at the corresponding position of the sub-frame, it can be detected whether the hole meets the preset size, and then it can be judged whether the sub-frame is deformed. At the same time, the side locating shaft is connected with a reset elastic part, so that when the hole position of the sub-frame does not meet the requirements, the side locating shaft will not bend and deform due to collision with other positions of the sub-frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a fixing fixture for processing a sub-frame mentioned in the utility model;

[0013] Figure 2 for Figure 1 A front view of a fixing fixture for machining a subframe;

[0014] Figure 3 It is a schematic structural diagram of a fixing fixture for processing a sub-frame mentioned in the utility model after being assembled with a sub-frame of an automobile;

[0015] Figure 4 It is a structural schematic diagram of the side movable limiting unit mentioned in the utility model;

[0016] Figure 5 It is a structural schematic diagram of the side positioning unit mentioned in the utility model;

[0017] Figure 6 It is a structural schematic diagram of the bottom pressing unit and the bottom positioning unit mentioned in the utility model;

[0018] Figure 7 It is a structural schematic diagram of the pre-compression unit mentioned in the utility model.

[0019] In the figure: 1. clamp side plate, 2. side movable limit unit, 201. side limit base, 202. movable limit block, 203. detection rod, 204. proximity switch sensor, 205. limit block driving device, 3. side positioning unit, 301. side support sleeve, 302. side positioning shaft, 303. positioning shaft driving cylinder, 4. bottom clamping unit, 401. clamping block driving device, 402. bottom clamping block, 5. bottom positioning unit, 6. workpiece back support block, 7. workpiece pre-installation positioning shaft, 8. pre-clamping unit, 801. pre-clamping driving device, 802. front pre-clamping block, 803. back pre-clamping block, 9. automobile subframe. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] For example, see the attached Figure 1 ~Attached Figure 7The utility model provides a fixing fixture for processing a sub-frame, comprising a fixture side plate 1, on which are symmetrically arranged two side movable limiting units 2, two side positioning units 3, two bottom clamping units 4 and two bottom positioning units 5, and each limiting and positioning unit arranged on the opposite side can more stably fix the two sides of the automobile sub-frame 9 to be processed; the side movable limiting unit 2 comprises a side limiting base 201, a movable limiting block 202 and a limiting block driving device 205, the movable limiting block 202 is slidably connected to the side limiting base 201, and the limiting block driving device 205 is drivingly connected to the movable limiting block 202, and the movable limiting block 202 can be driven by the limiting block driving device 205 from the side of the automobile sub-frame 9 to the specified position of the automobile sub-frame 9. The movable limit block 202 is provided with a positioning groove adapted to the specified position structure of the automobile subframe 9. After the movable limit block 202 is fitted with the automobile subframe 9, the positioning groove can clamp the specified position of the automobile subframe 9. The limit block driving device 205 is electrically connected to a proximity switch assembly, and the proximity switch assembly includes a detection rod 203 and two proximity switch sensors 204. The detection rod 203 is fixedly connected to the movable limit block 202, and the two proximity switch sensors 204 are fixedly connected to the side limit base 201. The detection rod 203 can be detected by the two proximity switch sensors 204 during the movement of the movable limit block 202, so that the stroke of the movable limit block 202 can be controlled, which is convenient for the adjustment of the fixture. The side positioning unit 3 includes a side support The support sleeve 301, the side support sleeve 301 is arranged facing the movable limit block 202, and is used for supporting and limiting the side and back of the automobile subframe 9, and is used in conjunction with the movable limit block 202; the bottom clamping unit 4 includes a bottom clamping block 402 and a clamping block driving device 401, the bottom positioning unit 5 includes a bottom positioning shaft, and the bottom clamping block 402 is provided with a bottom positioning hole adapted to the bottom positioning shaft. The bottom clamping block 402 is driven by the clamping block driving device 401, and the automobile subframe 9 at this location will be pressed between the bottom clamping block 402 and the bottom positioning shaft; at the same time, the fixture side plate 1 is also fixedly provided with several workpiece back support blocks 6, several workpiece pre-installed positioning shafts 7 and a pre-clamping unit 8, and the workpiece back support block 6 is used for The back of the frame 9 at the processing position plays a supporting role to prevent stress deformation at the processing position. The workpiece pre-installation positioning shaft 7 is used for rapid positioning when the automobile subframe 9 is installed. The pre-pressing unit 8 includes a pre-pressing drive device 801, a back pre-pressing block 803 and a front pre-pressing block 802. The pre-pressing drive device 801 and the back pre-pressing block 803 are fixedly arranged on the fixture side plate 1. The pre-pressing drive device 801 is driven and connected to the front pre-pressing block 802. The front pre-pressing block 802 is arranged facing the direction of the back pre-pressing block 803. The pre-pressing drive device 801 drives the front pre-pressing block 802, so that the specified position of the automobile subframe 9 can be pressed between the front pre-pressing block 802 and the back pre-pressing block 803.

[0022] In a further solution, the side positioning unit 3 also includes a positioning shaft driving cylinder 303 and a reset elastic member. The aforementioned side support sleeve 301 is slidingly sleeved with a side positioning shaft 302. The aforementioned positioning shaft driving cylinder 303 is drivingly connected to the side positioning shaft 302. One end of the reset elastic member is fixedly connected to the side positioning shaft 302, and the other end is fixedly connected to the telescopic part of the positioning shaft driving cylinder 303. When the machine is not powered on and ventilated, the reset elastic member can make the side positioning shaft 302 retract into the side support sleeve 301, so as to protect the side positioning shaft 302. The movable limit block 202 is provided with a side positioning hole adapted to the side positioning shaft 302.

[0023] The working principle of this embodiment is as follows:

[0024] As attached Figure 3As shown, firstly, the automobile subframe 9 is moved to the fixture manually or by a robot. At this time, the automobile subframe 9 can be quickly positioned and adjusted to the predetermined position by assembling the designated hole position on the automobile subframe 9 with the pre-installed positioning shaft 7 of the workpiece. Then, the automobile subframe 9 is manually clamped by manual pressing. Then, each driving device of the fixture is started. The pre-pressing unit 8 drives the front pre-pressing block 802 through the pre-pressing driving device 801. The front pre-pressing block 802 cooperates with the back pre-pressing block 803 to clamp the designated position of the automobile subframe 9. The movable limit block 202 of the side movable limit unit 2 approaches the automobile subframe 9 from the side under the drive of the limit block driving device 205, and finally Finally, the specified front position of the automobile subframe 9 is limited by structures such as limit grooves, and then the side positioning shaft 302 passes through the back of the automobile subframe 9 and finally cooperates with the movable limit block 202 to lock the structure of the automobile subframe 9 at this location, while the lower part of the automobile subframe 9 is pressed by the bottom clamping block 402 on the front of the automobile subframe 9 and the bottom positioning shaft on the back. Through the cooperation of the above-mentioned mechanisms, the automobile subframe 9 can be stably limited on the fixture, and then the specified position of the automobile subframe 9 can be mechanically processed. During the processing, the back of the processing surface of the automobile subframe 9 is provided with a workpiece back support block 6, which can play a supporting role and prevent stress deformation at the processing position. First, the automobile subframe is moved to the fixture manually or by a robot. At this time, the automobile subframe can be quickly positioned and adjusted to the predetermined position by assembling the designated hole position on the automobile subframe with the pre-installed positioning shaft of the workpiece. Then, the automobile subframe is manually clamped by manual pressing. Then, each driving device of the fixture is started. The pre-pressing unit drives the front pre-pressing block through the pre-pressing driving device. The front pre-pressing block cooperates with the back pre-pressing block to clamp the designated position of the automobile subframe. The active limit block of the side active limit unit approaches the automobile subframe from the side under the drive of the limit block driving device, and finally passes through the limit groove. The structures limit the designated front position of the automobile subframe, and then the side positioning shaft passes through the back of the automobile subframe and finally cooperates with the movable limiting block to lock the structure of the automobile subframe at this location, while the lower part of the automobile subframe is pressed by the bottom clamping block on the front of the automobile subframe and the bottom positioning shaft on the back. Through the cooperation of the above-mentioned mechanisms, the automobile subframe can be stably limited on the fixture, and then the designated position of the automobile subframe can be mechanically processed. During the processing, a workpiece back support block is provided on the back of the processing surface of the automobile subframe to play a supporting role and prevent stress deformation at the processing position.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", "head, tail" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0026] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the above technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A fixing fixture for processing a sub-frame, comprising a fixture side plate, characterized in that: The side panels of the fixture are symmetrically provided with side movable limit units, side positioning units, two bottom clamping units and two bottom positioning units; the side movable limit units include side limit bases, movable limit blocks and limit block driving devices, the movable limit blocks are slidably connected to the side limit bases, the limit block driving devices are drivingly connected to the movable limit blocks, the side positioning units include side support sleeves, the side support sleeves are arranged facing the direction of the movable limit blocks, the bottom clamping units include bottom clamping blocks and clamping block driving devices, the bottom positioning units include bottom positioning shafts, the bottom clamping blocks are provided with bottom positioning holes matched with the bottom positioning shafts; the side panels of the fixture are fixedly provided with several workpiece back support blocks and several workpiece pre-installed positioning shafts.

2. A fixing fixture for processing a sub-frame according to claim 1, characterized in that: The clamp side plate is also fixedly provided with a pre-compression unit, and the aforementioned pre-compression unit includes a pre-compression driving device, a back pre-compression block and a front pre-compression block. The aforementioned pre-compression driving device and the back pre-compression block are fixedly provided on the clamp side plate, the aforementioned pre-compression driving device is drivingly connected to the front pre-compression block, and the aforementioned front pre-compression block is arranged facing the direction of the back pre-compression block.

3. The fixing fixture for processing a sub-frame according to claim 1, characterized in that: The side movable limit unit also includes a proximity switch assembly electrically connected to the limit block driving device, the proximity switch assembly includes a detection rod and two proximity switch sensors, the detection rod is fixedly connected to the movable limit block, the two proximity switch sensors are fixedly connected to the side limit base, and the detection rod can be detected by the two proximity switch sensors respectively during the movement of the movable limit block.

4. A fixing fixture for processing a sub-frame according to claim 1, characterized in that: The side positioning unit also includes a positioning shaft driving cylinder, the side support sleeve sliding sleeve is provided with a side positioning shaft, the positioning shaft driving cylinder is drivingly connected to the side positioning shaft, and the movable limit block is provided with a side positioning hole adapted to the side positioning shaft.

5. A fixing fixture for processing a sub-frame according to claim 4, characterized in that: The side positioning unit also includes a reset elastic member, one end of which is fixedly connected to the side positioning shaft, and the other end of which is fixedly connected to the telescopic part of the positioning shaft driving cylinder.

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