CN110640627B

CN110640627B - Workpiece clamp for metallographic specimen grinding and polishing machine

Info

Publication number: CN110640627B
Application number: CN201910891900.2A
Authority: CN
Inventors: 李洋; 白敏丽; 吕继组; 张永飞
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2021-04-20
Anticipated expiration: 2039-09-20
Also published as: CN110640627A

Abstract

The invention discloses a workpiece clamp for a metallographic specimen grinding and polishing machine, which comprises a base, an L-shaped clamping arm, a base top cover, a sliding caliper, a caliper top cover, a pressing sheet base and a sliding pressing sheet. The base is fixed on a beam between the polishing disc and the polishing disc of the metallographic polishing machine through countersunk head threaded holes on two sides. The L-shaped clamping arm is arranged on the base, and the top cover at the upper end is used for fixing the L-shaped clamping arm. The part of the L-shaped clamping arm connected with the base is provided with a ratchet device, and under the action of the ratchet device, the clamping arm can only rotate anticlockwise, so that the polishing disc and the polishing disc can share one clamping device through the reverse rotation of the clamping arm. The test piece is fixed in the horizontal direction through the clamping arm, the sliding calipers on the L-shaped clamping arm are adjusted to fix the test pieces with different sizes, and meanwhile, the longitudinal movement of the test piece is restrained through the tabletting device fixed at the end part of the L-shaped clamping arm. The invention greatly improves the efficiency of grinding and polishing the test piece and reduces the potential safety hazard in the process of grinding the test piece.

Description

Workpiece clamp for metallographic specimen grinding and polishing machine

Technical Field

The invention relates to clamping equipment, in particular to a workpiece clamp for a metallographic specimen grinding and polishing machine.

Background

The metallographic grinding and polishing machine is metallographic sample preparation equipment, and can be used for grinding and polishing the surface of a metal sample, so that the specific appearance of the metal metallographic phase can be observed and analyzed conveniently. When a metallographic grinding and polishing machine is operated to prepare a sample, an operator generally needs to hold the sample with hands to be close to the grinding and polishing machine for grinding and polishing, the operation is very inconvenient, certain potential safety hazards exist, and the grinding and polishing efficiency is low.

Disclosure of Invention

In order to overcome the defects of the prior art, the clamping equipment for the metallographic grinding and polishing machine is provided, the problem that the position of a sample is controlled by hands all the time is solved, the situation that the surface flatness is poor due to uneven force application of the hands is avoided, and the grinding quality and efficiency are improved to a great extent.

The technical scheme of the invention is as follows:

a workpiece clamp for a metallographic specimen grinding and polishing machine comprises a base, an L-shaped clamping arm, a base top cover, a sliding caliper, a caliper top cover, a pressing piece base and a sliding pressing piece;

the base is fixed at the middle position of the two turnplates of the polishing and burnishing machine through a fastening screw, a threaded hole is formed in the top end of the base and used for being connected with a base top cover, and the longitudinal movement of the L-shaped clamping arm is restrained under the action of the base top cover;

the end part of the long arm of the L-shaped clamping arm is provided with an internal gear structure, the internal gear structure is meshed with the boss structure on the base to form a ratchet wheel structure, and the L-shaped clamping arm is prevented from longitudinally moving by the top cover of the base; the L-shaped clamping arm can only rotate around the meshing point along the rotation direction (namely anticlockwise) opposite to the rotating disc, and the polishing disc share one clamping device through the anticlockwise rotation of the L-shaped clamping arm; due to the limiting effect of the ratchet wheel structure, the L-shaped clamping arm cannot rotate clockwise, so that the tangential friction force applied to the sample in the polishing process is resisted;

the sliding caliper can slide along the long arm of the L-shaped clamping arm, the position of the sliding caliper is adjusted according to the size of the sample, and the sliding caliper is fixed through a caliper top cover on the upper portion of the sliding caliper and a fastening screw;

the pressing sheet base is fixed at the folding point of the L-shaped clamping arm and is provided with a longitudinal connecting rod, and the sliding pressing sheet is sleeved on the longitudinal connecting rod and can rotate and move up and down around the longitudinal connecting rod so as to adapt to the position and the height of a workpiece.

Different types of sliding pressing sheets are selected according to the size of the processed sample, so that the sliding pressing sheets are pressed on the middle position of the upper surface of the sample.

The invention has the beneficial effects that: the workpiece clamp for the metallographic specimen grinding and polishing machine is fixed on the grinding and polishing machine, so that samples with different sizes can be conveniently selected for grinding and polishing, an operator does not need to hold the samples with hands, and the operation safety is guaranteed. The rotary clamping arm can be sequentially used for two links of grinding and polishing. The cost is reduced while the utilization rate of the equipment is improved. The polishing and polishing machine can continuously polish and polish the surface by adjusting the pressing sheet, loosen the fastening screw in the middle of the sliding caliper after a period of time, and conveniently take out a workpiece to observe the surface, so that the operation of an operator is easier, and the sample polishing and polishing efficiency is greatly improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the base structure of the present invention.

FIG. 3 is a schematic view of the structure of the L-shaped clamp arm of the present invention.

FIG. 4 is a schematic view of the base structure of the sliding caliper of the present invention.

Fig. 5 is a schematic view of the structure of the upper cover of the sliding caliper of the present invention.

Figure 6 is a schematic view of the base structure of the sheeting of the present invention.

Fig. 7 is a schematic view of the structure of the slide fastener of the present invention.

In the figure: 1, a base; a 2L-shaped clamping arm; 3, a base top cover; 4, sliding calipers; 5 a caliper top cover; 6, pressing a sheet base; 7 sliding the tablet.

Detailed Description

In order to more clearly illustrate the objects and technical solutions of the present invention, the present invention is further explained below with reference to the accompanying drawings and specific examples. It should be understood that the specific embodiments described herein are illustrative of the present embodiments only and are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or through an intermediate medium, or both elements may be interconnected. The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art

Referring to fig. 1, an embodiment of the present invention provides a work fixture for a metallographic specimen polishing machine, including a base 1, an L-shaped clamping arm 2, a base top cover 3, a sliding caliper 4, a caliper top cover 5, a tablet base 6, and a sliding tablet 7.

As shown in figure 2, the structure is a base of the whole set of clamping equipment, countersunk head screw holes are formed in two ends of the base, and the base is fastened between the polishing disc and the polishing disc through bolts, so that two rotary discs can share the same clamping equipment. A notch is arranged on the first layer of boss on the base 1 and used for installing a spring plate required by the ratchet structure. The screw thread at the uppermost part of the base is connected with the base top cover 3 for fixing the L-shaped clamping arm 2 fitted over the base 1 such that the L-shaped clamping arm 2 cannot move longitudinally.

As shown in fig. 3, the L-shaped clamping arm 2 has an internal gear structure at the left end, and is connected with the base 1 to form a ratchet structure, so that the L-shaped clamping arm 2 can only rotate counterclockwise. Because both turntables are rotated clockwise, the tangential friction to which the sample is subjected during polishing is resisted. Since the clamping device can be rotated clockwise, the two turntables share one clamping device.

Shown in fig. 4 is a sliding caliper 4, which is connected to a caliper top cover 5 (shown in fig. 5) that can slide over the L-shaped clamping arm 2. Therefore, an appropriate clamping position can be selected according to the size of the sample to be processed, and the position of the slide caliper 4 is fixed by a fastening bolt located in the middle of the caliper top cover 5.

Fig. 6 shows a tablet base 6, fig. 7 shows a sliding tablet 7, which together form a tablet device. The lower end of the pressing sheet base 6 is provided with threads and is fixed by being connected with a threaded hole at the end part of the L-shaped clamping arm 2, and the sliding pressing sheet 7 and a longitudinal sliding rod of the pressing sheet base 6 are in interference fit, so that an additional fixing device is not needed. The sliding tablet 7 can rotate and move up and down around the longitudinal link to accommodate the workpiece position and height. Different types of sliding tablets are selected according to the size of the processed sample, so that the tablets are pressed on the middle position of the upper surface of the sample.

The above examples are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.

Claims

1. A workpiece clamp for a metallographic specimen grinding and polishing machine is characterized by comprising a base (1), an L-shaped clamping arm (2), a base top cover (3), a sliding caliper (4), a caliper top cover (5), a pressing sheet base (6) and a sliding pressing sheet (7);

the base (1) is fixed at the middle position of two turnplates of the polishing and burnishing machine through a fastening screw, a threaded hole is formed in the top end of the base and used for being connected with a base top cover (3), and the longitudinal movement of the L-shaped clamping arm (2) is restrained under the action of the base top cover (3);

the end part of the long arm of the L-shaped clamping arm (2) is provided with an internal gear structure, the internal gear structure is meshed with a boss structure on the base (1) to form a ratchet structure, and the L-shaped clamping arm (2) is prevented from longitudinally moving through a base top cover (3); the L-shaped clamping arm (2) can only rotate around the meshing point in the direction opposite to the rotating direction of the rotating disc, and the polishing disc share one clamping device through the anticlockwise rotation of the L-shaped clamping arm (2); due to the limiting effect of the ratchet wheel structure, the L-shaped clamping arm (2) cannot rotate clockwise, so that the tangential friction force applied to the sample in the polishing process is resisted;

the sliding caliper (4) can slide along the long arm of the L-shaped clamping arm (2), the position of the sliding caliper (4) is adjusted according to the size of a sample, and the sliding caliper is fixed through a caliper top cover (5) on the upper portion of the sliding caliper (4) and a fastening screw;

the pressing sheet base (6) is fixed at the folding point of the L-shaped clamping arm (2), the pressing sheet base (6) is provided with a longitudinal connecting rod, and the sliding pressing sheet (7) is sleeved on the longitudinal connecting rod and can rotate and move up and down around the longitudinal connecting rod to adapt to the position and height of a workpiece.

2. The workholding fixture for a metallographic specimen grinding and polishing machine according to claim 1, characterized in that different types of sliding preforms (7) are selected depending on the size of the specimen to be processed, so as to ensure that the sliding preforms (7) are pressed against the middle of the upper surface of the specimen.