CN104075660B - Working table used for fixing magnetic conductive workpiece and optimeter thereof - Google Patents

Abstract

The invention discloses a workbench and an optical meter for fixing a magnetically permeable workpiece. The purpose is to solve the problem that the workpiece is controlled by a manual control method during the measurement process, and it is difficult to stabilize the control of the motion process of the measured workpiece. When measuring with an optical meter, the measurement accuracy cannot reach the measurement accuracy of the instrument design, and the measurement personnel cannot accurately read the measurement point data and other problems. The device includes a fixed base, a controllable magnetic device and a positioning device. The workbench for fixing magnetically permeable workpieces of the present invention can fix the magnetically permeable workpieces, so that the workpieces to be measured are kept relatively still with the working surface during the process of moving and measuring, and the measured workpieces can be realized by cooperating with the movement mechanism. Slow, smooth movement of parts. The invention also provides an optical meter based on a workbench for fixing a magnetically permeable workpiece, which has high measurement accuracy and is easy to operate. Through the improvement of the invention, the optical meter can reach the design measurement precision, and the measurement result is accurate, stable and reliable.

Description

A workbench for fixing a magnetically permeable workpiece and its optical meter

technical field

The invention relates to the field of machinery, especially the field of measuring instruments, in particular to a workbench for fixing a magnetically permeable workpiece and an optical meter thereof.

Background technique

In recent years, with the rapid development of modern manufacturing industry, higher requirements have been put forward for the measurement accuracy and measurement efficiency of measuring instruments. Optical meter is an optical-mechanical instrument with high accuracy and a high-precision contact measuring instrument. It has been widely used in enterprise quality inspection departments and university laboratories.

At present, most optical meters use contact measurement. In the measurement process of the optical meter, the measurement process of the measured part is mainly completed by manual control. The graduation value of a common optical meter: 1μm, the variation of the indication value: 0.1μm, the reading range: ±100μm, it is difficult to stably control the movement process of the measured part by manual control. During the measurement process, manually controlling the part will cause the following problems:

1) Manual control is difficult to ensure that the measured part is always in close contact with the workbench during the entire measurement process, the obtained measurement results are far from the true value of the part, and the measurement accuracy cannot reach the measurement accuracy of the instrument design;

2) During the measurement process, it is necessary to control the part by hand, so that the part is in contact with the measuring cap on the workbench, so as to measure the part, but the movement of the hand to the measured part cannot be stably controlled, resulting in the display window of the optical meter The data in the center fluctuates greatly, and the measurement personnel cannot accurately read the measurement point data, and even because the hand controls the part is not stable, there are multiple maximum points;

3) Due to the manual control method, the measurement process is difficult to control, and the resulting data instability and other phenomena bring repeated and unnecessary operations to the measurement process, which reduces the measurement efficiency and greatly affects the convenience of instrument operation during measurement. sex.

In view of this, the applicant wishes to provide a new workbench for fixing a magnetically permeable workpiece and an optical meter using the same, so as to solve the aforementioned problems.

Contents of the invention

The purpose of the present invention is to: during the measurement process of the workpiece, the manual control method controls the part, and the stability control of the motion process of the measured workpiece is relatively difficult. When the optical meter is used for measurement, the measurement accuracy cannot reach the measurement accuracy of the instrument design. , measurement personnel can not accurately read the measurement point data, there are many repeated operations, low measurement efficiency, poor convenience problems, provide a workbench and its optical meter for fixing a magnetic workpiece. The workbench of the present invention can fix the magnetically permeable workpiece through the mutual cooperation between the components, so that the workpiece to be measured is always kept relatively still with the working surface during the process of moving and measuring. , can realize the smooth and slow running of the measured parts, so as to meet the needs of optical meters and other instruments. At the same time, the present invention also provides an optical meter based on a workbench for fixing a magnetically permeable workpiece. The optical meter can not only stabilize the window data display of the measured data points, improve the accuracy of the measured data, but also facilitate the observation and recording of the experimental data. Improve instrument operability. The invention has high measurement precision, can meet the design requirements of the optical meter, has good repeatability, stable, accurate and reliable measurement results, and has good application prospects.

In order to achieve the above object, the present invention adopts the following technical solutions:

A workbench for fixing a magnetically permeable workpiece, comprising a fixed base, a controllable magnetic device capable of generating magnetism and eliminating magnetism, and a positioning device arranged on the controllable magnetic device for fixing a magnetically permeable workpiece, the positioning device It includes a horizontal baffle and a vertical baffle connected to the horizontal baffle, the fixed base is made of non-magnetic conductive material, the positioning device is made of magnetic conductive material, and the controllable magnetic device is set on On the fixed base, the upper end surface of the controllable magnetic device is a working surface, and the horizontal blocking piece is arranged on the working surface.

The magnetic field lines generated by the opening of the controllable magnetic device pass through the positioning device, so that the magnetic workpiece and the positioning device are close together.

The horizontal blocking piece and the vertical blocking piece are integrally formed, and the horizontal blocking piece and the vertical blocking piece are perpendicular to each other.

The positioning device is L-shaped.

A movable or fixed connection is adopted between the horizontal blocking piece and the controllable magnetic device.

The controllable magnetic device is a permanent magnet controllable magnetic device or an electronic controllable magnetic device.

The controllable magnetic device is one of a magnetic watch base, a permanent magnetic sucker, and an electromagnet.

The fixed base is made of aluminum alloy or stainless steel non-magnetic material, and the positioning device is made of silicon steel sheet.

It also includes a sliding mechanism capable of moving the controllable magnetic device relative to the fixed base.

The sliding mechanism includes a sliding guide rail arranged on the fixed base and a groove arranged on the lower end surface of the controllable magnetic device, and the sliding guide rail is matched with the groove;

Or the sliding mechanism includes a groove arranged on the fixed base, and a sliding guide rail arranged on the lower end surface of the controllable magnetic device and matched with the groove.

The sliding guide rail is one of a linear slide rail, a dovetail groove guide rail, and a T-shaped groove guide rail.

The sliding guide rail is a dovetail groove guide rail, and a reed is arranged between the dovetail groove guide rail and the groove.

It also includes a motion control mechanism, which is a screw drive mechanism or a rack and pinion drive mechanism.

The motion control mechanism is a linear motion control mechanism.

The screw transmission mechanism is one of a threaded screw transmission mechanism, a T-shaped screw transmission mechanism, and a ball screw transmission mechanism.

The screw transmission mechanism is a threaded screw transmission mechanism, and the threaded screw transmission mechanism includes a threaded screw, a nut matched with the threaded screw, a support frame, and a driver, and the support frame is arranged on a fixed base. On the seat, the threaded screw is arranged on the support frame, the driving part is connected with the threaded screw and can drive the threaded screw to rotate relative to the support frame, the nut is connected with the controllable magnetic device to form a thread pair, and through the thread The secondary energy drives the controllable magnetic device to move relative to the fixed base.

The driving part is a cylindrical driving handwheel or an L-shaped driving handwheel.

The optical meter using the aforementioned workbench includes a workbench and a leveling cone arranged on the lower end surface of the fixed base, and the workbench is arranged on the base of the optical meter through the leveling cone;

Or include a workbench, a horizontal movement mechanism, and a leveling cone. The fixed base in the workbench is arranged on the horizontal movement mechanism and the fixed base can move relative to the horizontal movement mechanism. on the optical meter base.

It also includes a leveling mechanism, through which the working surface can be kept level. The leveling mechanism can be a screw.

On the basis of long-term practice, the applicant has conducted in-depth research and found that when the existing manual measurement of the workpiece, the standard gauge block is first placed on the workbench of the optical meter, after the optical meter is calibrated, and then manually The workpiece is placed on the position of the standard gauge block, and the measured part is measured. Since most of the measured parts are cylindrical, polygonal, etc., the parallel state between the axis of the measured part and the working surface is easily damaged during the measurement process, and the window range of the optical meter is only ±0.1mm, so a slight movement can Make the workpiece deviate from the measurement range, resulting in the problem that the data cannot be read; and during the measurement process, it is usually necessary to control the workpiece with the hand, and the slight deviation of the hand will also cause the aforementioned problems, and the hand cannot maintain absolute balance. In the process of repeated measurement, multiple maximum values may appear; therefore, the fixation of the workpiece is the key to solve the aforementioned problems. In this regard, the applicant provides a workbench for fixing a magnetically permeable workpiece (hereinafter referred to as the workbench).

The workbench of the present invention includes a fixed base, a controllable magnetic device, and a positioning device; wherein, the positioning device is arranged on the controllable magnetic device, which includes a horizontal block and a vertical block connected to the horizontal block for fixing Magnetically conductive workpiece; the fixed base is made of non-magnetically conductive material, the positioning device is made of magnetically conductive material, the controllable magnetic device is set on the fixed base, the upper end surface of the controllable magnetic device is the working surface, and the horizontal block The sheet is set on the work surface. The controllable magnetic device can generate magnetism and demagnetization, and then exhibit diamagnetism and paramagnetism. In the present invention, the controllable magnetic device is located between the fixed base and the positioning device, the fixed base is made of a non-magnetic material, and the positioning device is made of a magnetic material, thereby forming a non-magnetic layer from bottom to top , The controllable magnetic layer, the magnetic layer is similar to the "sandwich" structure, and the positioning device includes a horizontal block and a vertical block; usually, the controllable magnetic device is in the closed state, there is no magnetic force on the working surface, and the guide The magnetic workpiece can be easily loaded and unloaded from the working surface. When the controllable magnetic device is in the open state, the controllable magnetic device exhibits magnetic force to the outside. At this time, the non-magnetic layer cannot transmit the magnetic field, and the magnetic force line passes through the positioning device, and the positioning device plays a role in collecting The action of the magnetic field lines produces the strongest magnetic force on the positioning device, thereby firmly adsorbing the measured part to the positioning device. In the present invention, the positioning device includes a horizontal baffle and a vertical baffle, which can position the measured part and prevent the deflection of the measured workpiece. The most important thing is to play an adsorption role, so that the measured part can be tightly adsorbed on the positioning device. Due to the strong adsorption force of the positioning device to the measured part, even during the movement of the device, the measured part can still be well fixed on the working surface of the controllable magnetic device, and slight movement is difficult to occur.

During the experiment, after the applicant removed the fixed base, he directly fixed the controllable magnetic device on the base of the optical meter, and the base of the optical meter is made of a magnetically permeable material. After testing, in this state, the position of the positioning device The magnetic force is the weakest, and the measured part cannot be effectively fixed on the working surface. When the measured part is in contact with the measuring cap, the measured part moves frequently, which is similar to the measurement result of the manual method. At the same time, the applicant used a fixed base, a controllable magnetic device, and did not use a positioning device to conduct tests. The experiment found that: when the controllable magnetic device is in the open state, the part under test will automatically rotate on the working surface, and at a certain A position is stationary, which makes the measured part in a non-measurement position. At the same time, without a positioning device, when measuring a cylindrical workpiece, the cylindrical measured part may even rotate continuously on the working surface. Only when the cylindrical shape is just at the N pole or S pole of the controllable magnetic device, It can remain static. When the positioning device is made of non-magnetic materials, it cannot serve the purpose of gathering magnetic force lines. When it is used to measure parts, the position of the measured parts is still uncertain, and the measurement results are meaningless. It can be seen that the "sandwich structure" composed of the fixed base, the controllable magnetic device and the positioning device, and the materials of the fixed base and the positioning device in the present invention are the necessary parts to realize the present invention, and it is through the mutual cooperation between each part , finally realized the purpose of the invention of the present application. If the fit in the present invention is violated, multiple maxima would occur and such measurements would be meaningless.

The controllable magnetic device in the present invention is a device that can generate and lose magnetism, and can be one of a magnetic watch base, a permanent magnet sucker, and an electromagnet. Take the magnetic watch stand as an example, the outer shell is two pieces of magnetic conductors separated by a non-magnetic copper plate in the middle, and there is a rotatable magnet inside, which is N and S poles along the diameter direction. When the magnet rotates to the middle position, the magnetic force lines respectively form an open circuit in the two magnetizers, and the workpiece can be easily taken away at this time; after rotating 90 degrees, the NS poles are respectively facing the two magnetizers, and at this time from the N pole to the magnetizer to From the guide rail to another magnetizer to the S pole, the magnetic field lines are closed, which can firmly adsorb the workpiece on the working surface.

The horizontal blocking piece and the vertical blocking piece are integrally formed, and the horizontal blocking piece and the vertical blocking piece are perpendicular to each other. The fixed base is made of aluminum alloy or stainless steel non-magnetic material, and the positioning device is made of silicon steel sheet. The positioning device can be made of L-shaped silicon steel sheet. The horizontal block and the controllable magnetic device adopt movable or fixed connections. In this embodiment, even if the fixing device is placed on the working surface, it can also play a role in positioning the measured parts. Screws are used to fix the positioning device on the controllable On the magnetic control device, the positioning device can always be kept at the same position, so that the measurement results have the characteristics of good repeatability and accurate measurement results. Preferably, the horizontal blocking piece is located on the center line from the N-level to the S-pole of the controllable magnetic device on the working surface.

The controllable magnetic device is a permanent magnet type controllable magnetic device or an electric control type controllable magnetic device. The controllable magnetic device is one of a magnetic watch base, a permanent magnet sucker, and an electromagnet. It also includes a sliding mechanism capable of moving the controllable magnetic device relative to the fixed base. The sliding mechanism includes a sliding guide rail arranged on the fixed base, a groove arranged on the lower end surface of the controllable magnetic device, and the sliding guide rail cooperates with the groove; or the sliding mechanism includes a groove arranged on the fixed base, arranged on a The sliding guide rail on the lower end surface of the magnetic control device and matched with the groove. Through the cooperation of the two, the controllable magnetic device can be moved relative to the fixed base. The sliding guide rail is a kind of linear slide rail, dovetail groove guide rail, and T-shaped groove guide rail. One of them, the sliding guide rail is a dovetail groove guide rail, and a reed is arranged between the dovetail groove guide rail and the groove. The structure of the dovetail guide rail is simple, and it can ensure the stability of the present invention, and the reeds between the two can adjust the fit gap to make the present invention run more smoothly.

It also includes a motion control mechanism, which is a screw drive mechanism or a rack and pinion drive mechanism. The motion control mechanism is a linear motion control mechanism. The screw transmission mechanism is one of a threaded screw transmission mechanism, a T-shaped screw transmission mechanism, and a ball screw transmission mechanism. The motion control mechanism enables the controllable magnetic device to move relative to the fixed base. One example is as follows: the screw transmission mechanism is a screw screw transmission mechanism, and the screw screw transmission mechanism includes a screw screw, a nut matched with the screw screw, a support frame, and a driving member. The support frame is arranged on the fixed base, the threaded lead screw is arranged on the support frame, the driving part is connected with the threaded lead screw and the driving part can drive the threaded lead screw to rotate relative to the support frame, the nut is connected with the controllable magnetic device, and through the threaded screw The cooperation of the bar and the nut drives the controllable magnetic device to move relative to the fixed base. The driving part is a cylindrical driving handwheel or an L-shaped driving handwheel.

At the same time, the present invention also uses the above-mentioned workbench on the optical meter, which includes a workbench, a leveling cone arranged on the lower end surface of the fixed base, and the workbench is arranged on the optical meter base through the leveling cone; or includes Worktable, horizontal moving mechanism, leveling cone, the fixed base in the working table is set on the horizontal moving mechanism and the fixed base can move relative to the horizontal moving mechanism, and the horizontal moving mechanism is set on the base of the optical meter through the leveling cone . The leveling mechanism in the present invention can adjust the vertical state of the working surface and the optical measuring head.

Taking the optical gauge of the present invention for fixing the workbench of magnetically permeable workpiece as an example, its working process is as follows. Before measuring, use the standard gauge block to "zero-adjust". When measuring, turn on the controllable magnetic device to make it generate magnetism, the measured part is adsorbed to the working surface of the controllable magnetic device, and is close to the positioning device, and the motion control mechanism is adjusted to make the measured part and the controllable magnetic device The device slowly passes through the measuring cap, reads the fretting difference of the tested part from the window, and calculates the actual size of the tested part. The movement of the worktable composed of the controllable magnetic device and the fixed base replaces the movement of the tested parts, and the motion control mechanism replaces the manual control. Through the cooperation of various parts, the magnetically conductive tested parts are tightly adsorbed to the surface of the workbench. It avoids direct control of the measurement parts by humans, converts large human errors into small system errors caused by mechanical structures, and improves measurement accuracy, accuracy and repeatability of measurement results. Through the motion control mechanism, slow and stable control is realized to meet the requirements for data stability. The design of this scheme improves the operability of the instrument, that is, non-professional measurement personnel can also complete the measurement and achieve measurement accuracy.

Under the condition that the original structural design of the optical meter remains unchanged, the optical meter in the present invention ensures that the axis of the measured part is in close contact with the working surface and remains parallel during the measurement process, so that the measurement result is close to the true value. stable features. In addition, the workbench combined with the optical meter can also be used to detect the geometric tolerance of parts such as straightness, flatness, roundness and cylindricity.

The applicant respectively adopts the original equipment (i.e., the parts are controlled manually, and then the optical meter is used for measurement), the improved equipment (i.e., the device of the present invention, through which the device cooperates with the optical meter, and then the measurement is carried out), and the three-coordinate The measuring machine measures two kinds of magnetically permeable parts (respectively recorded as magnetically permeable part 1 and magnetically permeable part 2). The comparison chart of the test effect of the first magnetic component is shown in Figure 6, and the comparison chart of the test effect of the second magnetic component is shown in Figure 7. Through comparison, it can be found that the measurement accuracy of the optical meter can be significantly improved by adopting the present invention, and the accuracy of measurement results can be improved. At the same time, the experimental results further prove that the stability of the measurement results of the optical meter of the present invention is better than that of the three-coordinate measuring machine, which shows that the present invention has significant progress.

Description of drawings

The invention will be illustrated by way of example with reference to the accompanying drawings, in which:

Fig. 1 is a schematic front view of the structure of the combination of the workbench and the optical meter base in the optical meter of the present invention.

Fig. 2 is a schematic side view of the combination mechanism of the workbench and the base of the optical meter in the optical meter of the present invention.

Fig. 3 is a schematic diagram of a sliding guide rail cooperating between the base of the workbench and the controllable magnetic device.

Figure 4 is a diagram of the original measurement scheme of the optical meter.

FIG. 5 is a partially enlarged schematic diagram of I in FIG. 4 .

Figure 6 is a comparison diagram of the test effect of the magnetic permeability part 1.

Figure 7 is a comparison diagram of the test effect of the second magnetic permeability part.

Marks in the figure: 1 is the fixed base, 2 is the controllable magnetic device, 3 is the positioning device, 4 is the horizontal block, 5 is the vertical block, 6 is the working surface, 7 is the sliding guide rail, 8 is the groove, 9 is a threaded screw, 10 is a support frame, 11 is a driving part, 12 is a leveling cone, 13 is an optical meter base, 14 is a leveling mechanism, 15 is a magnetic switch, 16 is a measured part, 17 is a measurement cap.

detailed description

All features disclosed in this specification, or steps in all methods or processes disclosed, can be combined in any way, except for mutually exclusive features or steps.

Any feature disclosed in this specification, unless specifically stated, can be replaced by other equivalent or alternative features with similar purposes, that is, each feature is only an example of a series of equivalent or similar features, unless specifically stated That's all.

Example 1

The optical meter of the invention is an important link for the optical meter to measure shaft parts such as smooth limit gauges and cylinder diameters. The present invention will be described below in conjunction with the accompanying drawings.

An optical meter includes a workbench for fixing parts to be measured, a leveling cone and a leveling mechanism, and the workbench is arranged on the base of the optical meter through the leveling cone. The leveling mechanism adopts screws, and the worktable is adjusted through the cooperation of the screws and the base of the optical meter. Among them, the workbench includes a fixed base, a controllable magnetic device, a positioning device, a sliding mechanism, a motion control mechanism, an upper support frame arranged on the fixed base, and a driving part. Vertical block, the fixed base is made of non-magnetic material, the positioning device is made of magnetic material, the controllable magnetic device is set on the fixed base, the upper end surface of the controllable magnetic device is the working surface, and the horizontal The blocking sheet is arranged on the working surface.

In this embodiment, the controllable magnetic device adopts a magnetic watch base, and by rotating the magnetic switch of the magnetic watch base, the magnetic watch base can be magnetized and demagnetized. In this embodiment, the fixed base is made of aluminum alloy, the positioning device adopts L-shaped silicon steel sheet, and the horizontal blocking piece and the vertical blocking piece are perpendicular to each other, which can be used to fix the magnetic workpiece (that is, be test parts). When the controllable magnetic device is opened, since the fixed base is made of non-magnetic material, the fixed base is a non-magnetic layer, the magnetic field lines generated by the controllable magnetic device pass through the positioning device, and the positioning device generates a strong magnetic force, so that The magnetic workpiece is held tightly against the positioning device. The horizontal baffle is located on the line from the N level to the S pole of the controllable magnetic device on the working surface, and the horizontal baffle is fixed on the controllable magnetic device by screws.

The sliding mechanism includes a sliding guide rail arranged on the fixed base, and a groove arranged on the lower end surface of the controllable magnetic device. The sliding guide rail cooperates with the groove so that the controllable magnetic device can slide relative to the fixed base. The motion control mechanism adopts a threaded lead screw transmission mechanism, which includes a threaded lead screw and a nut. The threaded lead screw cooperates with the nut, and the nut can be moved relative to the threaded lead screw by rotating the threaded lead screw. The threaded lead screw is arranged on the support frame, the driving part is connected with the threaded lead screw and the driving part can drive the threaded lead screw to rotate relative to the support frame, the nut is connected with the controllable magnetic device, and the controllable magnetic device can be driven through the cooperation of the threaded lead screw and the nut. The magnetic device moves relative to the fixed base. When in use, the threaded screw is driven by the rotating driving part, and under the cooperation of the threaded screw and the nut, the nut drives the fixed base to move, thereby realizing the movement of the measured part in the horizontal direction. In this embodiment, the driving part is an L-shaped driving hand wheel, and the sliding guide rail is a dovetail groove guide rail, and a reed is arranged between the dovetail groove guide rail and the groove, and the reed can adjust the matching gap between the sliding guide rail and the groove, so that The two can cooperate better, so as to ensure the smooth operation of the tested part.

In this embodiment, the L-shaped silicon steel sheet used in the positioning device has a high magnetic permeability, which can constrain the magnetic force lines on the upper surface of the controllable magnetic device, and tightly adsorb the measured part to the working surface through the collected magnetic force lines. When the controllable magnetic device moves along the sliding guide rail under the control of the threaded screw, the measured part moves together with the controllable magnetic device. The dovetail groove structure used for the connection between the controllable magnetic device and the fixed base is shown in Figure 3, and the sliding guide rail can also use linear slide rails, T-shaped slots and other sliding guide rails.

In conjunction with Fig. 1-3, the working process of the present invention is described as follows.

Before measuring, use a standard gauge block to complete "zero adjustment" for the height between the measuring cap and the working surface. Then install the tested part on the working surface of the controllable magnetic device, turn on the magnetic switch, the tested part is adsorbed to the working surface and tightly close to the vertical block of the positioning device. Rotate the driving part, control the controllable magnetic device and the tested part to pass through the measuring cap stably, and complete the measurement of the micro-motion difference of the tested part.

The results of multiple experiments show that when the optical meter of the present invention is used for measurement, the measurement result has good repeatability, accurate and reliable test result, and high measurement precision.

The present invention provides a new device, which can completely avoid method errors and random errors in the process of measuring shaft parts with conventional optical meters, avoid gross errors, improve measurement accuracy, improve operational performance, and ensure repeatable measurement results sex and accuracy.

Comparative experiment one

Fig. 4 is a diagram of the original measurement scheme of the optical meter, and Fig. 5 is a partially enlarged schematic diagram of I in Fig. 4 . Through the comparison of Figure 4 and Figure 5, it can be clearly seen that when the measured part is controlled manually and measured by an optical meter, it is often difficult to keep the part fixed, resulting in the situation in Figure 5. During the measurement, multiple maxima often occur.

Comparative experiment two

The workbench used in comparative experiment 2 does not include a fixed base, and the others are the same as in embodiment 1.

It has been determined that when the tested part is placed on the working surface in the second comparative experiment, the magnetic force between the tested part and the working surface is weak, and deflection will occur during the moving process. The part under test contacts the measuring cap and moves a lot, which cannot meet the measurement requirements.

Comparative experiment three

The workbench used in Comparative Experiment 3 does not include a positioning device, and the rest is the same as in Embodiment 1.

It has been determined that when the part under test is placed on the working surface in comparative experiment 3, the part under test deflects, and the resting position is different according to the size and size of the part under test. During the process of the measured part contacting the measuring cap and the movement of the fixed base, the measured part moves greatly, which cannot meet the measurement requirements.

Comparative experiment four

The positioning device in the workbench used in comparative experiment 4 is made of aluminum alloy, and the other is the same as that of embodiment 1.

The measurement results of comparative experiment 4 are similar to those of comparative experiment 3, and cannot meet the requirements of accurate measurement.

By comparing the invention, the various parts of the present invention have mutual cooperation. Once the cooperation is broken, the magnetic force will be weak, the workpiece will deflect, and multiple maximum values will appear, which will make the measurement results meaningless. The "sandwich structure" of the present invention, the materials of each part, and the baffle structure are the key to realizing the present invention. Among them, the function of the stopper is firstly to fix the position, secondly to prevent the workpiece under test from moving, and the most important thing is to collect the magnetic force lines according to the characteristics of the magnetic field going to the nearest line, and at the same time, the parts will automatically approach the positioning device. In the actual test, when the cylindrical workpiece is measured, when the cylindrical workpiece is placed on the working surface, the cylindrical workpiece will automatically move to the positioning device and tightly close to the positioning device, and it is difficult to move it by hand. The two are separated and will not deflect when the part under test is in contact with the cap. Multiple measurements have shown that the results are accurate and reliable.

The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, and any new method or process step or any new combination disclosed.

Claims (10)

1. a kind of workbench for fixing magnetic conductivity workpiece is it is characterised in that including fixed pedestal, producing magnetic and elimination The controllable magnetic device of magnetic, it is arranged on controllable magnetic device and is used for fixing the positioner of magnetic conductivity workpiece, described positioning Device includes horizontal catch, the vertical catch being connected with horizontal catch, and described controllable magnetic device is arranged on fixed pedestal, institute The upper surface stating controllable magnetic device is working face, and described horizontal catch is arranged on working face；

Described fixed pedestal, controllable magnetic device, positioner form non-magnetic layer, controlled magnetic layer, magnetic layer from bottom to top Structure；

Described fixed pedestal is prepared from by aluminium alloy or stainless steel non-permeable material, and described positioner is by silicon steel sheet system Become.

2. the workbench for fixing magnetic conductivity workpiece according to claim 1 it is characterised in that described horizontal catch with Vertically using being integrally formed between catch, and it is mutually perpendicular between horizontal catch and vertical catch.

3. the workbench for fixing magnetic conductivity workpiece according to any one of claim 1-2 is it is characterised in that described can Control magnetic devices are magneto controllable magnetic device or electric-controlled type controllable magnetic device.

4. the workbench for fixing magnetic conductivity workpiece according to claim 3 is it is characterised in that described controllable magnetic fills It is set to one of Magnetic gauge stand, permanent magnetic chuck, electromagnet.

5. the workbench for fixing magnetic conductivity workpiece according to claim 1-2,4 any one is it is characterised in that also wrap Include the slide mechanism that controllable magnetic device can be made to be relatively fixed pedestal movement.

6. the workbench for fixing magnetic conductivity workpiece according to claim 5 is it is characterised in that described slide mechanism bag Include the rail plate being arranged on fixed pedestal, be arranged on the groove of controllable magnetic device lower surface, described rail plate with recessed Groove matches；

Or described slide mechanism include being arranged on fixed pedestal groove, be arranged on controllable magnetic device lower surface and and groove The rail plate matching.

7. the workbench for fixing magnetic conductivity workpiece according to claim 3 it is characterised in that also include can make controlled Magnetic devices are relatively fixed the slide mechanism of pedestal movement.

8. the workbench for fixing magnetic conductivity workpiece according to claim 6 is it is characterised in that also include motion control Mechanism, described motion control mechanism is lead-screw drive mechanism or rack and pinion drive mechanism.

9. the workbench for fixing magnetic conductivity workpiece according to claim 8 is it is characterised in that described lead screw transmission machine Structure is threaded screw rod transmission mechanism, and described threaded screw rod transmission mechanism includes the nut that threaded screw rod is matched with threaded screw rod, Also include bracing frame, actuator, support frame as described above is arranged on fixed pedestal, described threaded screw rod is arranged on bracing frame, institute State actuator to be connected with threaded screw rod and the rotation of threaded screw rod relative support frame, described nut and controllable magnetic device phase can be driven Even constitute screw thread pair, and controllable magnetic device can be driven to be relatively fixed pedestal by screw thread pair and move.

10. adopt the optics meter of workbench described in aforementioned any one of claim 1-9 it is characterised in that including workbench, setting In the leveling frustum of fixed pedestal lower surface, described workbench is arranged on optics meter pedestal by leveling frustum；

Or including workbench, horizontal mobile mechanism, leveling frustum, the fixed pedestal in described workbench is arranged on the machine of moving horizontally On structure and fixed pedestal energy relative level travel mechanism moves, described horizontal mobile mechanism is arranged on optics meter by leveling frustum On pedestal.