CN216912143U

CN216912143U - Device for improving processing precision of test bar through one-time clamping

Info

Publication number: CN216912143U
Application number: CN202123322898.9U
Authority: CN
Inventors: 谢君; 王道红; 侯桂臣; 周亦胄
Original assignee: Jiangsu Jinyan New Material Technology Co ltd
Current assignee: Jiangsu Jinyan New Material Technology Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-07-08
Anticipated expiration: 2031-12-27

Abstract

The utility model relates to the field of processing of alloy circumferential test bars used in mechanical property tests, in particular to a device for improving the processing precision of the test bars through one-time clamping. The three movable clamping jaws are movably arranged in a rectangular mounting groove which is uniformly distributed on one side surface of the chuck body along the radial direction, one ends of the three movable clamping jaws correspond to the central hole of the chuck body, round bars are respectively welded at the corresponding ends of the three movable clamping jaws, and an inner hole is formed between each round bar and the corresponding end of the clamped test bar; the test bar is the coaxial body structure of dumbbell section and benchmark section, and the benchmark section is located the one end of dumbbell section, and the test bar centre bore is seted up to the other end of dumbbell section, and the benchmark section is corresponding with the hole that round bar one end formed and inserts the assembly, and it is coaxial with the dumbbell section that the top is located the other end of dumbbell section, and top one end is corresponding with the test bar centre bore and inserts the assembly. The utility model can optimize the processing technology of the test bar and improve the processing precision and the production efficiency of the alloy test bar.

Description

Device for improving processing precision of test bar through one-time clamping

The technical field is as follows:

the utility model relates to the field of processing of alloy circumferential test bars used in mechanical property tests, in particular to a device for improving the processing precision of the test bars through one-time clamping.

Background art:

the mechanical property test of the material is a test means for judging whether a material meets the mechanical technical requirements, and whether the material is subjected to a tensile test or a durability test, a material sample needs to be processed into a shape and a size which meet the test requirements. Therefore, the machining of test bars meeting the technical requirements is a prerequisite for meeting the correctness of the test results of the mechanical test. The nickel-based high-temperature alloy belongs to a typical metal material which is difficult to machine, the machining performance is poor, and the abrasion to a machining cutter is large in the machining process. The main processing process of the high-temperature alloy test bar is finished on a lathe, the traditional processing mode is that when the test bar is processed, two cylindrical surfaces and a central hole of a blank of the test bar are respectively used as positioning references for processing, and the clamping mode needs to clamp the test bar twice, so that the technical requirements on the coaxiality of the test bar and the like are difficult to guarantee. Therefore, it is necessary to improve the original processing technology to improve the processing precision and the processing efficiency of the test bar.

The utility model has the following contents:

the utility model mainly aims to provide a device for improving the processing precision of a test bar by one-time clamping, optimize the processing technology of a high-temperature alloy test bar, and eliminate the influence of repeated positioning of blank materials on the processing precision of the test bar in the processing process by one-time clamping of the processed test bar so as to improve the processing precision of the high-temperature alloy test bar.

The technical scheme of the utility model is as follows:

the utility model provides a device for improve test bar machining precision through a clamping, the device includes chuck body, movable jack catch, test bar, top, and concrete structure is as follows:

the three movable clamping jaws are movably arranged in a rectangular mounting groove which is uniformly distributed on one side surface of the chuck body along the radial direction, one ends of the three movable clamping jaws correspond to the central hole of the chuck body, round bars are respectively welded at the corresponding ends of the three movable clamping jaws, and an inner hole is formed between each round bar and the corresponding end of the clamped test bar; the test bar is the coaxial body structure of dumbbell section and benchmark section, and the benchmark section is located the one end of dumbbell section, and the test bar centre bore is seted up to the other end of dumbbell section, and the benchmark section is corresponding with the hole that round bar one end formed and inserts the assembly, and it is coaxial with the dumbbell section that the top is located the other end of dumbbell section, and top one end is corresponding with the test bar centre bore and inserts the assembly.

The device for improving the processing precision of the test rod through one-time clamping is characterized in that a mounting groove of a chuck body is communicated with an inner cavity of the chuck body, a small bevel gear and a large bevel gear transmission mechanism which are meshed with each other are arranged in the inner cavity of the chuck body, one side of the large bevel gear is a bevel gear surface, three small bevel gears are uniformly distributed on one side of the bevel gear surface, each small bevel gear is arranged on a rotating shaft, one end of each rotating shaft penetrates through a rotating shaft hole in the side surface of the chuck body, and the other side of the large bevel gear is a trapezoidal thread surface; the bottom surface of the movable clamping jaw is a trapezoidal thread section, and the trapezoidal thread section corresponds to and is meshed with the trapezoidal thread surface.

The device for improving the processing precision of the test bar through one-time clamping has the advantages that the trapezoidal thread surface is of a plane thread or plane spiral line type structure, the cross section of the thread or spiral line is trapezoidal, and the trapezoidal thread section is of a section of the plane thread or plane spiral line type structure.

The device for improving the processing precision of the test bars through one-time clamping is characterized in that two opposite side surfaces of each mounting groove are respectively provided with a slide rail, the two slide rails of each mounting groove are arranged in parallel relatively, two sides of each movable clamping jaw corresponding to the mounting groove are respectively provided with a slide groove, and the slide grooves are in one-to-one correspondence with the slide rails and are in sliding fit.

By means of the technical scheme, the utility model at least has the following advantages and beneficial effects:

1. after the test bar processing device is used, the processing work which can be finished only by two times of clamping can be finished by one time of clamping, so that the workload of an operator is reduced, the processing efficiency of the test bars in batch production is effectively improved, the positioning error caused by secondary clamping can be avoided, and the processing precision of the test bars is greatly improved.

2. The utility model can simultaneously improve the processing precision and the processing efficiency of the test bar, and can realize the processing tasks of all the surfaces of the alloy test bar by clamping once, thereby improving the processing precision of the test bar. Meanwhile, the requirement of processing efficiency during test bar batch production is considered, and the axial and radial positioning requirements of the test bars are met during clamp design. When an operator clamps the test bar, the test bar can be quickly positioned and clamped, so that the processing precision of the test bar is guaranteed, and the processing efficiency of the test bar is improved.

Description of the drawings:

to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art are briefly described as follows:

FIG. 1 is an assembly view of the device of the present invention and a test bar.

FIG. 2 is a sectional view showing the assembly of the test stick with the device of the present invention.

Fig. 3 is an assembly view of the modified movable jaw and chuck body.

Fig. 4 is a movement principle diagram of the modified movable jaw.

Fig. 5 is a schematic view of the modified movable jaw.

FIG. 6 is a schematic view of a blank of a test bar with positioning references.

In the figure, 1 chuck body, 2 movable claws, 3 test bars, 4 tops, 5 round bars, 6 reference sections, 7 test bar center holes, 8 sliding grooves, 9 trapezoidal thread sections, 10 sliding rails, 11 rotating shaft holes, 12 rotating shafts, 13 small bevel gears, 14 large bevel gears, 15 trapezoidal thread surfaces, 16 bevel gear surfaces, 17 chuck body inner cavities, 18 inner holes, 19 dumbbell sections, 20 mounting grooves and 21 chuck body center holes.

Detailed Description

The utility model is further explained in detail below with reference to the drawings and examples:

as shown in fig. 1-6, the device for improving the processing precision of the test bar by one-time clamping mainly comprises a chuck body 1, a movable jaw 2, a test bar 3 and a tip 4, and has the following specific structure:

the three movable clamping jaws 2 are movably arranged in a cuboid mounting groove 20 which is uniformly distributed on one side surface of the chuck body 1 along the radial direction, one ends of the three movable clamping jaws 2 correspond to a center hole 21 of the chuck body 1, round bars 5 are respectively welded at the corresponding ends of the three movable clamping jaws 2, and an inner hole 18 is formed between each round bar 5 and the corresponding end of the clamped test bar 3; the test bar 3 is the coaxial body structure of dumbbell section 19 and benchmark section 6, and benchmark section 6 is located the one end of dumbbell section 19, and test bar centre bore 7 is seted up to the other end of dumbbell section 19, and benchmark section 6 corresponds and the plug-in assembly with the hole 18 that 5 one end of pole formed, and top 4 is located the other end of dumbbell section 19 and coaxial with dumbbell section 19, and top 4's one end corresponds and the plug-in assembly with test bar centre bore 7.

The mounting groove 20 of the chuck body 1 is communicated with the inner cavity 17 of the chuck body, a small bevel gear 13 and a large bevel gear 14 transmission mechanism which are mutually meshed are arranged in the inner cavity 17 of the chuck body, a bevel gear surface 16 is arranged on one side of the large bevel gear 14, three small bevel gears 13 are uniformly distributed on one side of the bevel gear surface 16, each small bevel gear 13 is mounted on a rotating shaft 12, one end of each rotating shaft 12 penetrates through a rotating shaft hole 11 on the side surface of the chuck body 1, and a trapezoidal thread surface 15 is arranged on the other side of the large bevel gear 14; two opposite side surfaces of the mounting groove 20 are respectively provided with a slide rail 10, the two slide rails 10 of each mounting groove 20 are arranged in parallel relatively, two sides of each movable clamping jaw 2 corresponding to the mounting groove 20 are respectively provided with a slide groove 8, the slide grooves 8 and the slide rails 10 are in one-to-one correspondence and are in sliding fit, and the bottom surface of each movable clamping jaw 2 is a trapezoidal thread section 9; the trapezoidal thread section 9 corresponds to the trapezoidal thread surface 15, the trapezoidal thread surface 15 is a plane thread or a plane spiral line type structure, the cross section of the thread or the spiral line is trapezoidal, the trapezoidal thread section 9 is a section of the plane thread or the plane spiral line type structure, and the trapezoidal thread section 9 is meshed with the trapezoidal thread surface 15. When the movable clamping jaw is used, the rotating shaft 12 drives the large bevel gear 14 to rotate through the small bevel gear 13, and the movable clamping jaw 2 is enabled to do reciprocating linear motion in the mounting groove 20 under the matching structure of the sliding groove 8 and the sliding rail 10.

As shown in fig. 1-6, the movable jaw 2 is modified by welding the movable jaw 2 to a round bar 5. In the previous procedure, the test rod 3 is processed to form a reference section 6 and a test rod central hole 7, and the axial size of the test rod 3 is ensured. The modified movable clamping jaws 2 are arranged on the chuck body 1, an inner hole 18 is processed at the round bar 5 of the modified movable clamping jaws 2 through an inner hole lathe tool, and the inner hole 18 formed between the round bars 5 is matched with the test bar reference section 6. The utility model can process the alloy test bar with the diameter range of 10 mm-20 mm by replacing the modified movable clamping jaws 2, and the processing technology of the test bar can be optimized by using the device, thereby improving the processing precision and the production efficiency of the alloy test bar.

After the test rod is processed by the method, the coaxiality of the middle rod body of the test rod and the central lines of the two ends of the test rod is improved from 0.03mm to 0.007mm by testing the size and the processing precision of the test rod. In addition, the roundness of the rod body is also improved from 0.02mm to 0.003 mm. Therefore, the utility model greatly improves the position tolerance and the shape tolerance precision of the processed test bar.

The result shows that the test bar processed by adopting the new clamping mode is improved to a certain extent in the aspects of dimensional tolerance, form and position tolerance and the like, and the accuracy of the subsequent mechanical property test result to be developed is powerfully guaranteed.

Claims

1. The utility model provides a device for improve test bar machining precision through a clamping, its characterized in that, the device includes chuck body, movable jack catch, test bar, top, and concrete structure is as follows:

2. The device for improving the processing precision of the test rod by one-time clamping according to claim 1, wherein the mounting groove of the chuck body is communicated with the inner cavity of the chuck body, a small bevel gear and a large bevel gear transmission mechanism which are meshed with each other are arranged in the inner cavity of the chuck body, one side of the large bevel gear is a bevel gear surface, three small bevel gears are uniformly distributed on one side of the bevel gear surface, each small bevel gear is arranged on a rotating shaft, one end of each rotating shaft is arranged in a rotating shaft hole in the side surface of the chuck body in a penetrating way, and the other side of the large bevel gear is a trapezoidal thread surface; the bottom surface of the movable clamping jaw is a trapezoidal thread section, and the trapezoidal thread section corresponds to and is meshed with the trapezoidal thread surface.

3. The device for improving the processing accuracy of the test bar by one-time clamping according to claim 2, wherein the trapezoidal thread surface is a planar thread or a planar spiral structure, the cross section of the thread or the spiral is trapezoidal, and the trapezoidal thread section is a section of the planar thread or the planar spiral structure.

4. The device for improving the processing precision of the test rods through one-time clamping according to claim 1, wherein two opposite side surfaces of the mounting groove are respectively provided with a sliding rail, the two sliding rails of each mounting groove are arranged in parallel relatively, two sides of each movable clamping jaw corresponding to the mounting groove are respectively provided with a sliding groove, and the sliding grooves are in one-to-one correspondence with the sliding rails and are in sliding fit with the sliding rails.