CN109458915B - Detection tool and detection method for profile of disc cam - Google Patents

Abstract

The invention discloses a detection tool and a detection method for the profile of a disc cam. The detection tool comprises a support base plate, a clamping component, a left sliding component, a right sliding component and a rotating component; the detection method of the invention includes the installation of the disc cam, the scale Ruler calibration, sliding component adjustment, testing tool startup, and observation of testing results. The detection tool of the present invention has a simple structure and is easy to operate; the detection tool of the present invention can be selected from two measurement methods, which can meet different detection requirements; the detection method of the present invention is simple and convenient to operate and easy to master; the present invention can accurately measure The profile of the disc cam is measured, and it can be applied to different disc cams with high flexibility.

Description

A detection tool and detection method for the profile of a disc cam

technical field

The invention relates to the technical field of cam machinery, in particular to a detection tool and a detection method for the profile of a disc-shaped cam.

Background technique

A cam is a mechanical turning or sliding element (such as a wheel or wheel protrusion) that transmits motion to a roller that moves against its edge or a needle bar that moves freely on the grooved face. The cam follower mechanism can be designed into any input-output relationship that can be satisfied within its motion range. For some purposes, cams and linkages can do the same thing; but for jobs where both can do it, cams are easier to design than linkages, and cams can do many things that linkages cannot. . The disc cam is a disc-shaped member that rotates around a fixed axis and has a changing diameter. The movement law of the follower of the cam mechanism depends on the contour curve of the cam, so the detection of the cam contour is particularly important.

In the prior art, the movement laws such as the displacement curve and the contour curve of the cam cannot be easily detected, and it is not convenient to design the cam. In addition, the method of template comparison is used in the production and detection of cams, and the detection is not accurate; and during the use of cams, wear will occur, and the amount of wear is not easy to directly measure, or the detection equipment that can accurately measure is expensive, and the measurement process is complicated.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above deficiencies, and to provide a detection tool and a detection method for the profile of a disc cam.

To achieve the above object, the present invention is implemented according to the following technical solutions:

A detection tool for the profile of a disc cam, the detection tool is used for detecting the profile of the disc cam; the detection tool comprises a support base plate, a clamping component, a left sliding component, a right sliding component, and a rotating component;

There is a ruler groove on the left side of the support base plate; a scale is arranged in the ruler groove; the scale is pressed in the ruler groove by several pressing bolts;

The clamping component includes a left clamping component and a right clamping component; the lower end of the left clamping component is provided with a laser light;

The left sliding assembly includes a support piece, a sliding rod, a spring, and a guide sleeve; the support piece is fixedly installed on the left side of the support base plate; the guide sleeve is installed on the upper end of the support piece; Slide left and right in the guide sleeve; the spring is sleeved on the sliding rod at the right end of the guide sleeve;

The right sliding component and the left sliding component are symmetrical in structure, and are installed on the right side of the support base plate;

The left clamping component is detachably fixed on the right end of the sliding rod of the left sliding component; the right clamping component is detachably fixed on the left end of the sliding rod of the right sliding component; the left sliding component, the left clamping component, the right The clamping component and the right sliding component are coaxial;

The rotating assembly includes a rotating support, a rotating shaft, a fixed pressure plate, a dynamic pressure plate, a connecting rod, a compression nut, and a driving device; the rotating shaft passes through the upper end of the rotating support; there is a bearing between the rotating shaft and the rotating support The head of the rotating shaft is fixed with a fixed pressure plate; the head of the rotating shaft has a threaded hole; the fixed pressure plate has a stepped hole; the dynamic pressure plate has a through hole; A small-diameter threaded rod matched with a small threaded hole; the middle part of the connecting rod can be matched with the shaft hole of the disc cam; the head of the connecting rod is a large-diameter threaded rod that cooperates with the compression nut; the connecting rod is screwed into the rotating shaft; the disc-shaped cam to be detected penetrates into the connecting rod, and the passive pressure plate is combined with the compression nut to be pressed tightly;

The rotating assembly is installed on the support base plate and is located between the left sliding assembly and the right sliding assembly;

The driving device drives the rotating shaft to rotate, and drives the disc cam pressed by the fixed pressure plate and the dynamic pressure plate to rotate.

Preferably, the left clamping component is conical; the right end surface of the left clamping component is a contact plate; the contact plate is perpendicular to the support bottom plate; the right clamping component is conical; the right clamping component There is a contact rod on the left end face; the end of the contact rod is in the shape of a smooth arc.

Preferably, an elastic rubber ring is bonded to the right side of the fixed pressure plate and the left side of the dynamic pressure plate; the contact surface of the elastic rubber ring and the disc cam has anti-skid patterns.

Preferably, an electronic ruler is connected to the right end of the sliding rod of the right sliding assembly; the output line of the electronic ruler is connected to a computer to record the displacement change of the electronic ruler.

The present invention also includes a method for detecting the profile of a disc cam, and its technical scheme is as follows, comprising the following steps:

Step 1, disc cam installation

Screw the tail end of the connecting rod into the fixed pressure plate and the head of the rotating shaft, and then put the disc cam on the middle part of the connecting rod; put the dynamic pressure plate on the connecting rod, and screw the compression nut on the head of the connecting rod , so that the disc cam is pressed by the fixed pressure plate and the dynamic pressure plate; when the disc cam is installed, ensure that the outer edge of the disc cam is aligned with the contact rod;

Step 2, Scale Calibration

Check the position of the scale and calibrate it; make the "0" scale line of the scale align with the center of the disc camshaft hole;

Step 3, adjust the sliding components

Check the left sliding assembly and the right sliding assembly to ensure that the sliding rod of the sliding assembly can slide smoothly; make the left and right clamping assemblies clamp the outer contour of the disc cam;

Step 4, check tooling startup

Turn on the laser light on the left clamping assembly, connect the electronic ruler, start the driving device, and start to detect the profile of the disc cam;

Step 5, observe the test results

Choose to observe the scale according to your needs, or observe the data of the electronic scale; if you measure accurately, call up the data of the electronic scale for comparison; if you make a rough comparison, you can directly observe the movement range of the laser light on the scale.

The working principle of the present invention:

The inspection tool of the present invention includes a supporting base plate, a clamping component, a left sliding component, a right sliding component, and a rotating component. The supporting bottom plate is the supporting part of the whole inspection tool, which is used to support the left sliding component, the right sliding component and the rotating component. A scale is also installed in the support base plate.

The structure of the detection tooling of the present invention has two detection modes:

First, use the scale installed in the support base in combination with the laser light to observe the transformation of the outer contour data of the disc cam. This detection method is relatively rough, but the process of visual inspection is relatively fast, and the change of the profile data of the disc cam can be visually observed, and the cam profile with a large deviation can be observed intuitively.

Second, use the electronic ruler connected by the right slide assembly. The electronic ruler can intuitively change the size of the disc cam during the rotation process, output it by electrical signal, and display the change of the distance on the computer or other instruments. The change of the distance is the data of the outer contour of the disc cam. The data of this detection method is accurate, but the efficiency is lower than that of direct observation. It is necessary to compare the detected data with the standard data in detail. Slower, but suitable for precise design and inspection processes.

The electrical connection of the laser lamp in the present invention belongs to the prior art and will not be described in detail here. The electronic ruler used in the present invention is used to measure the distance. The electronic ruler belongs to a type of linear displacement sensor, and other linear displacement sensors can also be selected to achieve the purpose of measuring distance. The selection of the electronic ruler and the use of a computer to read the data are the skills and the prior art, which can be selected by the technical personnel according to the precision, and the model will not be described in detail here.

In the sliding assembly of the present invention, through the action of the spring, the clamping assembly can reciprocate left and right along with the rotation of the cam. The clamping assembly of the present invention selects two types of contact plate and contact rod; to contact with the disc cam; when there is a groove on the disc cam and the contact plate cannot be contacted, the contact rod can be used to detect the entire disc cam. Profile, can meet different disc cams.

The rotating assembly of the present invention uses the joint action of the connecting rod, the fixed pressure plate and the dynamic pressure plate to press the disk cam between the fixed and movable pressure plates. The connecting rod of this process can be designed differently according to the difference of the shaft hole of the disc cam detected. When detecting disc cams with different shaft holes, just replace the connecting rod and the dynamic pressure plate. The elastic rubber rings on the fixed pressure plate and the dynamic pressure plate are designed to clamp the disc cam stably.

Compared with the prior art, the beneficial effects of the present invention are:

The detection tool of the present invention has a simple structure and is easy to operate; the detection tool of the present invention can be selected from two measurement methods, which can meet different detection requirements; the detection method of the present invention is simple and convenient to operate and easy to master; the present invention can accurately measure The profile of the disc cam is measured, and it can be applied to different disc cams with high flexibility.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the present invention;

2 is a left side view of a rotating assembly according to an embodiment of the present invention;

3 is a schematic structural diagram of a certain pressure plate according to an embodiment of the present invention;

4 is a schematic structural diagram of a dynamic pressure plate according to an embodiment of the present invention;

5 is a schematic structural diagram of a connecting rod according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of Embodiment 2 of the present invention.

In the figure: 1. Supporting base plate; 2. Left sliding component; 3. Right sliding component; 4. Ruler groove; 5. Scale; 6. Pressing bolt; 7. Left clamping component; 8. Right clamping component; 9, laser light; 10, contact plate; 11, contact rod; 12, support; 13, sliding rod; 14, spring; 15, guide sleeve; 16, rotating support; 17, rotating shaft; 18, fixed pressure plate; 19, dynamic pressure plate; 20, connecting rod; 21, compression nut; 22, driving device; 23, bearing; 24, threaded hole; 25, step hole; 26, through hole; 27, elastic rubber ring; 28, Small diameter threaded rod; 29, large diameter threaded rod; 30, disc cam; 31, electronic ruler.

Detailed ways

The present invention will be further described below with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

Example 1

As shown in FIG. 1 to FIG. 5 , a detection tool for the profile of a disc cam is used to detect the profile of the disc cam 30 . The inspection tooling includes a support base plate 1, a clamping assembly, a left sliding assembly 2, a right sliding assembly 3, and a rotating assembly.

There is a ruler groove 4 on the left side of the support base plate 1; a scale 5 is arranged in the ruler groove 4;

The clamping assembly includes a left clamping assembly 7 and a right clamping assembly 8; the lower end of the left clamping assembly 7 is provided with a laser light 9. The left clamping component 7 is conical; the right end surface of the left clamping component 7 is a contact plate 10 ; the contact plate 10 is perpendicular to the supporting bottom plate 1 . The right clamping component 8 is conical; the left end surface of the right clamping component 8 has a contact rod 11 ; the end of the contact rod 11 is in the shape of a smooth arc.

The left sliding assembly 2 includes a support member 12, a sliding rod 13, a spring 14 and a guide sleeve 15; the support member 12 is fixedly installed on the left side of the support base plate 1; the guide sleeve 15 is installed on the upper end of the support member 12; the sliding rod 13 is installed on the guide sleeve 15 It can slide left and right in the guide sleeve 15; the spring 14 is sleeved on the sliding rod at the right end of the guide sleeve 15.

The right sliding assembly 3 and the left sliding assembly 2 are symmetrical in structure, and are installed on the right side of the support base plate 1 .

The left clamping component 7 is detachably fixed on the right end of the sliding rod 13 of the left sliding component 2; the right clamping component 8 is detachably fixed on the left end of the sliding rod of the right sliding component 3; the left sliding component 2, the left clamping component 7, The right clamping assembly 8 and the right sliding assembly 3 are coaxial.

The rotating assembly includes a rotating support 16 , a rotating shaft 17 , a fixed pressure plate 18 , a dynamic pressure plate 19 , a connecting rod 20 , a compression nut 21 , and a driving device 22 . The rotating shaft 17 runs through the upper end of the rotating support 16; there is a bearing 23 between the rotating shaft 17 and the rotating support 16; the head of the rotating shaft 17 is fixed with a fixed pressure plate 18;

There are stepped holes 25 in the fixed pressure plate 18; through holes 26 in the dynamic pressure plate 19; elastic rubber rings 27 are bonded to the right side of the fixed pressure plate 18 and the left side of the dynamic pressure plate 19; The contact surface of the shaped cam 30 has anti-skid patterns.

The tail of the connecting rod 20 is a small diameter threaded rod 28 that cooperates with the small threaded hole 24; the middle part of the connecting rod 20 can be matched with the shaft hole of the disc cam 30; the head of the connecting rod 20 is a large diameter that cooperates with the compression nut 21. The threaded rod 29; the connecting rod 20 is screwed into the rotating shaft 17;

The rotating assembly is mounted on the support base plate 1 and is located between the left sliding assembly 2 and the right sliding assembly 3 .

The driving device 22 drives the rotating shaft 17 to rotate, and drives the disc cam 30 pressed by the fixed pressure plate 18 and the dynamic pressure plate 19 to rotate.

Embodiment 2

As shown in FIG. 6 , on the basis of Embodiment 1, an electronic scale 31 is connected to the right end of the sliding rod of the right sliding component 3 ;

Embodiment 3

A method for detecting the profile of a disc cam, the technical scheme of which is as follows, comprising the following steps:

Step 1, disc cam installation

Screw the tail end of the connecting rod into the fixed pressure plate and the head of the rotating shaft, and then put the disc cam on the middle part of the connecting rod; put the dynamic pressure plate on the connecting rod, and screw the compression nut on the head of the connecting rod , so that the disc cam is pressed by the fixed pressure plate and the dynamic pressure plate; when the disc cam is installed, ensure that the outer edge of the disc cam is aligned with the contact rod;

Step 2, Scale Calibration

Check the position of the scale and calibrate it; make the "0" scale line of the scale align with the center of the disc camshaft hole;

Step 3, adjust the sliding components

Check the left sliding assembly and the right sliding assembly to ensure that the sliding rod of the sliding assembly can slide smoothly; make the left and right clamping assemblies clamp the outer contour of the disc cam;

Step 4, check tooling startup

Turn on the laser light on the left clamping assembly, connect the electronic ruler, start the driving device, and start to detect the profile of the disc cam;

Step 5, observe the test results

Choose to observe the scale according to your needs, or observe the data of the electronic scale; if you measure accurately, call up the data of the electronic scale for comparison; if you make a rough comparison, you can directly observe the movement range of the laser light on the scale.

The technical solutions of the present invention are not limited to the limitations of the above-mentioned specific embodiments, and all technical modifications made according to the technical solutions of the present invention fall within the protection scope of the present invention.

Claims (2)

1. The detection tool is used for detecting the profile of the disc cam; the method is characterized in that: the detection tool comprises a supporting bottom plate, a clamping assembly, a left sliding assembly, a right sliding assembly and a rotating assembly;

a ruler groove is formed in the left side of the supporting bottom plate; a graduated scale is arranged in the scale groove; the graduated scale is tightly pressed in the scale groove through a plurality of compression bolts;

the clamping assembly comprises a left clamping assembly and a right clamping assembly; the lower end of the left clamping component is provided with a laser lamp;

the left sliding assembly comprises a supporting piece, a sliding rod, a spring and a guide sleeve; the supporting piece is fixedly arranged on the left side of the supporting bottom plate; the guide sleeve is arranged at the upper end of the support piece; the sliding rod is arranged in the guide sleeve and can slide left and right in the guide sleeve; the spring is sleeved on the sliding rod at the right end of the guide sleeve;

the right sliding assembly and the left sliding assembly are symmetrical in structure and are arranged on the right side of the supporting bottom plate;

the left clamping assembly is detachably fixed at the right end of the sliding rod of the left sliding assembly; the right clamping assembly is detachably fixed at the left end of the sliding rod of the right sliding assembly; the left sliding assembly, the left clamping assembly, the right clamping assembly and the right sliding assembly are coaxial;

the rotating assembly comprises a rotating support piece, a rotating shaft, a fixed pressure plate, a movable pressure plate, a connecting rod, a compression nut and a driving device; the rotating shaft penetrates through the upper end of the rotating support piece; a bearing is arranged between the rotating shaft and the rotating support piece; a fixed pressure plate is fixed at the head of the rotating shaft; the head part of the rotating shaft is provided with a small threaded hole; a step hole is formed in the fixed pressure disk; a through hole is formed in the movable pressure plate; the tail part of the connecting rod is a small-diameter threaded rod matched with the small threaded hole; the middle part of the connecting rod can be matched with the shaft hole of the disc cam; the head of the connecting rod is a large-diameter threaded rod matched with the compression nut; the connecting rod is screwed into the rotating shaft; a disc cam to be detected penetrates through the connecting rod, and the driven pressure plate is combined with the compression nut to be compressed;

the rotating assembly is arranged on the supporting bottom plate and is positioned between the left sliding assembly and the right sliding assembly;

the driving device drives the rotating shaft to rotate and drives the disc-shaped cam pressed by the fixed pressure disc and the dynamic pressure disc to rotate;

the left clamping component is conical; the right end face of the left clamping assembly is a contact plate; the contact plate is perpendicular to the supporting bottom plate; the right clamping component is conical; a contact rod is arranged on the left end face of the right clamping assembly; the end part of the contact rod is in a smooth arc shape;

elastic rubber rings are bonded on the right side surface of the constant pressure disc and the left side surface of the dynamic pressure disc; the contact surface of the elastic rubber ring and the disc-shaped cam is provided with anti-skid patterns;

the right end of the right sliding component sliding rod is connected with an electronic ruler; the output line of the electronic ruler is connected with the computer to record the displacement change of the electronic ruler.

2. The detection tool of claim 1 is used for detecting the profile of the disc cam, and is characterized in that: the method comprises the following steps:

step one, mounting a disc cam

The tail end of the connecting rod is screwed into the fixed pressure plate and the rotating shaft head, and then the disc-shaped cam is sleeved in the middle of the connecting rod; sleeving the movable pressure plate on the connecting rod, and screwing a compression nut into the head of the connecting rod to enable the disk-shaped cam to be compressed by the fixed pressure plate and the movable pressure plate; when the disc cam is installed, the outer edge of the disc cam is aligned with the contact rod;

step two, calibrating the graduated scale

Checking the position of the graduated scale and calibrating; so that the 0-scale line of the scale is aligned with the circle center of the disc-shaped camshaft hole;

step three, adjusting the sliding component

Checking the left sliding assembly and the right sliding assembly to ensure that a sliding rod of the sliding assembly can slide smoothly; so that the left and right clamping components clamp the outer contour of the disc cam;

step four, detecting the start of the tool

Turning on a laser lamp on the left clamping assembly, connecting an electronic ruler, starting a driving device and starting to detect the profile of the disc-shaped cam;

step five, observing the detection result

Selecting an observation scale or observing data of the electronic ruler according to needs; if the measurement is accurate, calling out the data of the electronic ruler for comparison; if the comparison is rough, the moving range of the laser lamp on the graduated scale can be directly observed.

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