CN224129476U - Mechanical parts grinding fixture - Google Patents

Abstract

This utility model relates to the field of fixture technology and discloses a grinding fixture for mechanical parts, including a mounting base, a first limiting block, and a clamping mechanism. The mounting base is equipped with the clamping mechanism for holding the mechanical parts. The first limiting block is slidably connected to the mounting base, and a slider is slidably connected to the first limiting block. A support rod for supporting the mechanical parts from the inside is fixedly connected to the top of the slider. Four fixing ears are symmetrically arranged on the side end face of the mounting base. A groove is formed on the mounting base at a corresponding position of the first limiting block, and the first limiting block slides within the groove. The slider can drive the support rod to move adaptively, thus it can be applied to workpieces with different inner contours. The support rod supports the workpiece from the inside, and the support rod, in conjunction with the clamping mechanism, positions the workpiece, thus preventing deformation due to excessive clamping force. This ensures the stability of the workpiece while preventing deformation, guaranteeing grinding accuracy and efficiency.

Description

Mechanical part polishing clamp

Technical Field

The utility model relates to the technical field of clamps, in particular to a mechanical part polishing clamp.

Background

The polishing jig is a device for fixing and positioning a mechanical part so as to maintain stability and accuracy thereof during polishing processing, and ensures that polishing operation can be performed according to design requirements by clamping, supporting or positioning the part, thereby improving processing efficiency and product quality.

In the prior art, a general clamp usually directly acts on the outer surface of a part to realize clamping fixation by virtue of a clamping plate, in order to ensure stable positioning of the mechanical part, higher clamping force needs to be applied, but when the hollow mechanical part is subjected to higher clamping force, the hollow part has obvious non-uniformity in material distribution due to the hollow structural characteristics, the integral rigidity of the hollow part is greatly different from that of a solid part, when higher clamping force is applied, the local area of the hollow part, especially the position with thinner wall thickness or relatively weak structure, can bear stress exceeding the strength limit of the hollow part, the phenomenon of local stress concentration is extremely easy to cause irreversible deformation of the part, such as local recess, distortion or dimensional deviation, and the like, so that the processing precision of the part is directly reduced, even the part is possibly completely scrapped, the final quality of a product is seriously affected, but if the clamping force is reduced to avoid the part deformation, the lower clamping force cannot provide enough constraint force to resist various acting forces generated in the processing process, thereby loosening the mechanical part in the polishing process is caused, the polishing position is not caused, the surface roughness is extremely difficult to control, and the problem of the polishing precision of the mechanical part cannot be accurately processed is solved.

Disclosure of utility model

In order to overcome the problem that the large clamping force can cause deformation of the mechanical parts when the hollow mechanical parts are clamped.

The mechanical part polishing clamp comprises a mounting seat, a first limiting block and a clamping mechanism, wherein the clamping mechanism for clamping the mechanical part is arranged on the mounting seat, the first limiting block is connected to the mounting seat in a sliding manner, a sliding block is connected to the first limiting block in a sliding manner, a supporting rod for supporting the mechanical part from the inside is fixedly connected to the top of the sliding block, and four fixing lugs are symmetrically arranged on the side end faces of the mounting seat.

Preferably, the mounting seat is provided with a sliding groove at a corresponding position of the first limiting block, the first limiting block slides in the sliding groove, and the height of the sliding groove is higher than that of the first limiting block.

As the preference, fixedly connected with is to the spacing first gag lever post of slider on the first stopper, and slider sliding connection is on first gag lever post, fixedly connected with spring between slider and the first stopper, and the inside rotation of mount pad is connected with the first threaded rod that drives first stopper and adjust, and first stopper threaded connection is on first threaded rod, and the outside fixedly connected with of first threaded rod first outer hexagonal rotating block, first outer hexagonal rotating block rotate and connect on the mount pad.

Preferably, the first limiting block is provided with a limiting groove at a corresponding position of the sliding block, the sliding block slides in the limiting groove, and the sliding block is enabled to move in a short distance through the sliding groove and the first limiting rod.

Preferably, the clamping mechanism comprises a second threaded rod, the second threaded rod is rotationally connected to the mounting seat, a second outer hexagonal rotating block is fixedly connected to the outer side of the second threaded rod, a second limiting block is rotationally connected to the mounting seat, a plug rod is inserted onto the second limiting block, a clamping block for clamping mechanical parts is fixedly connected to the inner side of the plug rod, a positioning plate is fixedly connected onto the plug rod, a rotating shaft is rotationally connected onto the second limiting block, a second limiting rod is fixedly connected onto the rotating shaft, a bolt is slidingly connected onto the second limiting rod, the bolt is in contact with the positioning plate, and the bolt is in threaded connection onto the second limiting block.

Preferably, the installation seat is provided with a sliding groove at the corresponding position of the second limiting block, the second limiting block slides in the sliding groove, the second limiting block is provided with an adaptive clamping groove at the corresponding position of the inserted link, and the inserted link is clamped in the clamping groove.

Preferably, the positioning plate is provided with a groove, the bolt penetrates through the groove, the second limiting block is provided with a movable groove at the corresponding position of the second limiting rod, and the width of the movable groove is larger than the diameter of the second limiting rod.

The utility model has the beneficial effects that:

1. The support rod can be driven to adaptively move through the sliding block, so that the support rod can be applied to workpieces with different inner contours, the workpieces are supported from the inner parts of the workpieces through the support rod, the support rod is matched with the clamping mechanism to position the workpieces, deformation caused by overlarge clamping force of the clamping mechanism can be avoided, the workpiece deformation can be avoided while the stability of the workpieces is ensured, and the polishing precision and the polishing efficiency are ensured.

2. The replaceable clamping blocks can be suitable for workpieces of different sizes, the contact area between the replaceable clamping blocks and the workpieces can be guaranteed, so that enough friction and clamping force are provided, the stability of the workpieces is guaranteed, the workpieces can be replaced quickly, and the use is more convenient.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic cross-sectional view of a first stopper according to the present utility model;

FIG. 3 is a schematic view of a part of the clamping mechanism according to the present utility model;

FIG. 4 is a schematic cross-sectional view of a clamping mechanism according to the present utility model;

fig. 5 is an exploded view of the clamping mechanism of the present utility model.

The reference numerals are 1, a mounting seat, 21, a first limiting block, 22, a sliding block, 23, a supporting rod, 24, a first limiting rod, 25, a spring, 26, a first threaded rod, 27, a first outer hexagonal rotating block, 31, a second threaded rod, 32, a second outer hexagonal rotating block, 33, a second limiting block, 34, an inserting rod, 35, a clamping block, 36, a positioning plate, 37, a rotating shaft, 38, a second limiting rod, 39, a bolt and 4, and a fixing lug.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

Referring to fig. 1-5, the utility model provides an embodiment of a mechanical part polishing fixture, which comprises a mounting seat 1, and further comprises a first limiting block 21 and a clamping mechanism, wherein the mounting seat 1 is provided with the clamping mechanism for clamping the mechanical part, the first limiting block 21 is slidably connected to the mounting seat 1, a sliding block 22 is slidably connected to the first limiting block 21, the top of the sliding block 22 is fixedly connected with a supporting rod 23 for supporting the mechanical part from inside, four fixing lugs 4 are symmetrically arranged on the side end surface of the mounting seat 1, the mechanical part is placed on the top of the mounting seat 1, a plurality of supporting rods 23 are selected according to the internal contour of the mechanical part, the sliding block 22 is driven by the first limiting block 21, the supporting rods 23 are driven by the sliding block 22 to tighten from the inside of the mechanical part, a workpiece is supported, the supporting rods 23 can perform proper displacement according to the internal contour of the mechanical part, then the clamping mechanism clamps the external surface, the forces of the supporting rods 23 and the clamping mechanism are mutually offset, so that the deformation of the workpiece is avoided, and the position of the mounting seat 1 can be fixed through the fixing lugs 4.

Referring to fig. 1-2, in this embodiment, a sliding groove is formed in a corresponding position of a first limiting block 21 in a mounting seat 1, the first limiting block 21 slides in the sliding groove, the height of the sliding groove is higher than that of the first limiting block 21, the first limiting block 21 is guided and limited by the sliding groove, the first limiting block 21 slides linearly under the driving of the first threaded rod 26, the clamping caused by tilting is avoided, the first limiting block 21 lower than the sliding groove cannot affect the placement of a mechanical part, a first limiting rod 24 limiting a sliding block 22 is fixedly connected to the first limiting block 21, the sliding block 22 is slidably connected to the first limiting rod 24, a spring 25 is fixedly connected between the sliding block 22 and the first limiting block 21, a first threaded rod 26 for driving the first limiting block 21 to adjust is rotatably connected to the inside of the mounting seat 1, a first threaded rod 26 is fixedly connected with a first outer hexagonal rotating block 27, the first outer hexagonal rotating block 27 is rotatably connected to the mounting seat 1, the sliding block 22 and a supporting rod 23 can be automatically reset by the spring 25, the sliding block 22 can be automatically reset by the sliding block 23, and can be applied to the corresponding position of the sliding block 22, and can not move along the sliding groove 22, and can be applied to the sliding groove 22, and can not be adapted to the sliding groove 22, and can be applied to the sliding groove 22.

Referring to fig. 1 and 3-5, in this embodiment, the clamping mechanism includes a second threaded rod 31, the second threaded rod 31 is rotatably connected to the mounting base 1, a second external hexagonal rotating block 32 is fixedly connected to the outer side of the second threaded rod 31, the second external hexagonal rotating block 32 is rotatably connected to the mounting base 1, a second limiting block 33 is screwed to the second external hexagonal rotating block 32, an insert rod 34 is inserted into the second limiting block 33, a clamping block 35 for clamping a mechanical part is fixedly connected to the inner side of the insert rod 34, a positioning plate 36 is fixedly connected to the insert rod 34, a rotating shaft 37 is rotatably connected to the second limiting block 33, a second limiting rod 38 is fixedly connected to the rotating shaft 37, a bolt 39 is slidably connected to the second limiting rod 38, the bolt 39 contacts with the positioning plate 36, the bolt 39 is screwed to the second limiting block 33, a workpiece can be clamped by the clamping block 35, and the detachable clamping blocks 35 are used for selecting the clamping blocks 35 suitable for corresponding workpieces, so that the clamping stability is ensured, the clamping blocks are replaced conveniently through the inserting rods 34, the mounting seat 1 is provided with a sliding groove at the corresponding position of the second limiting block 33, the second limiting block 33 slides in the sliding groove, the second limiting block 33 is provided with an adaptive clamping groove at the corresponding position of the inserting rods 34, the inserting rods 34 are clamped in the clamping grooves, the inserting rods 34 are initially positioned through the clamping grooves, then the positioning plates 36 and the bolts 39 are matched for secondary positioning, the fixing is more stable, the workpiece can be ensured to be clamped, the positioning plates 36 are provided with grooves, the bolts 39 penetrate through the grooves, the second limiting block 33 is provided with movable grooves at the corresponding positions of the second limiting rods 38, the width of the movable grooves is larger than the diameter of the second limiting rods 38, the second limiting rods 38 can be provided with enough movable spaces through the movable grooves, the second stop lever 38 can drive the bolt 39 to turn over, so that the disassembly of the insert lever 34 is not affected.

During operation, the connecting piece can pass through the position of fixed lug 4 fixed mounting seat 1, then place the work piece on the surface of mount pad 1, select a plurality of bracing piece 23 according to the interior profile of work piece, unnecessary bracing piece 23 is movable to the outside, avoid influencing the placing of work piece, the cover is outside a plurality of bracing piece 23 when placing the work piece, then twist corresponding first outer hexagonal turning block 27 and drive first threaded rod 26, first threaded rod 26 drives first stopper 21, first stopper 21 drives slider 22, slider 22 drives bracing piece 23, rise tightly from the inside of work piece through bracing piece 23, bracing piece 23 receives the extrusion and can slide in the outside of first gag lever post 24, simultaneously compress spring 25, spring 25 is used for slider 22 automatic re-setting, can make bracing piece 23 take place the short distance displacement, make bracing piece 23 adapt to different work pieces, after rising tightly the work piece, twist second outer hexagonal turning block 32 drives second threaded rod 31, second threaded rod 31 drives second stopper 33, second stopper 33 drives inserted bar 34, inserted bar 34 drives grip block 35, carry out grip block 35 through grip block 35 to work piece, rotate 39 and follow second rotation block 39 and make second stopper 39 rotate out, tip-out the position bolt 38, then, tip-up bolt 38 is changed to limit bolt 38, thereby take out the position-up bolt 38.

Through the steps, the workpiece is supported from the inside of the workpiece through the supporting rods 23, and the supporting rods 23 are matched with the clamping mechanism to position the workpiece, so that the problem that the mechanical part deforms when the hollow mechanical part is clamped by a large clamping force is solved.

Claims (7)

1. A mechanical parts grinding fixture, including a mounting base (1), characterized in that: it further includes a first limiting block (21) and a clamping mechanism, the mounting base (1) is provided with a clamping mechanism for clamping mechanical parts, the first limiting block (21) is slidably connected to the mounting base (1), a slider (22) is slidably connected to the first limiting block (21), a support rod (23) for supporting mechanical parts from the inside is fixedly connected to the top of the slider (22), and four fixed ears (4) are symmetrically provided on the side end face of the mounting base (1). 2. The mechanical parts grinding fixture according to claim 1, characterized in that: the mounting base (1) has a sliding groove at the corresponding position of the first limiting block (21), and the first limiting block (21) slides inside the sliding groove, and the height of the sliding groove is higher than the height of the first limiting block (21). 3. The mechanical parts grinding fixture according to claim 1, characterized in that: a first limiting rod (24) for limiting the slider (22) is fixedly connected to the first limiting block (21), the slider (22) is slidably connected to the first limiting rod (24), a spring (25) is fixedly connected between the slider (22) and the first limiting block (21), a first threaded rod (26) for driving the adjustment of the first limiting block (21) is rotatably connected inside the mounting base (1), the first limiting block (21) is threadedly connected to the first threaded rod (26), a first external hexagonal rotating block (27) is fixedly connected to the outside of the first threaded rod (26), and the first external hexagonal rotating block (27) is rotatably connected to the mounting base (1). 4. The mechanical parts grinding fixture according to claim 3, characterized in that: the first limiting block (21) has a limiting groove at the corresponding position of the slider (22), and the slider (22) slides inside the limiting groove, and the slider (22) moves a short distance through the sliding groove and the first limiting rod (24). 5. The mechanical parts grinding fixture according to claim 1, characterized in that: the clamping mechanism includes a second threaded rod (31), the second threaded rod (31) is rotatably connected to the mounting base (1), a second external hexagonal rotating block (32) is fixedly connected to the outer side of the second threaded rod (31), the second external hexagonal rotating block (32) is rotatably connected to the mounting base (1), a second limiting block (33) is threadedly connected to the second external hexagonal rotating block (32), and an insert is inserted into the second limiting block (33). The rod (34) has a clamping block (35) for clamping mechanical parts fixedly connected to its inner side. A positioning plate (36) is fixedly connected to the rod (34). A rotating shaft (37) is rotatably connected to the second limiting block (33). A second limiting rod (38) is fixedly connected to the rotating shaft (37). A bolt (39) is slidably connected to the second limiting rod (38). The bolt (39) is in contact with the positioning plate (36). The bolt (39) is threadedly connected to the second limiting block (33). 6. The mechanical parts grinding fixture according to claim 5, characterized in that: the mounting base (1) has a sliding groove at the corresponding position of the second limiting block (33), and the second limiting block (33) slides inside the sliding groove; the second limiting block (33) has a matching slot at the corresponding position of the insertion rod (34), and the insertion rod (34) is engaged inside the slot. 7. The mechanical parts grinding fixture according to claim 5, characterized in that: a groove is provided on the positioning plate (36) and the bolt (39) passes through the groove, and the second limiting block (33) is provided with a movable groove at the corresponding position of the second limiting rod (38), and the width of the movable groove is greater than the diameter of the second limiting rod (38).