Method and mechanism for measuring thickness of riveting plate

Abstract

The invention discloses a mechanism for measuring the thickness of a riveting plate, which comprises a riveting rod slidably arranged on a rack through a sleeve and a driving device for driving the riveting rod to stretch, and is characterized in that an ejector rod connected between the driving device and the riveting rod and a buffer sleeve slidably arranged on the ejector rod in a sleeving manner are slidably arranged in the sleeve; the end, close to the riveting rod, of the buffering sleeve protrudes out of the sleeve and is connected with a feeding device, the side wall of the sleeve is provided with an induction groove communicated with the interior of the sleeve, the induction groove extends in the axial direction of the sleeve, the outer wall of the sleeve is provided with a grating ruler reading head corresponding to the induction groove, and the grating ruler reading head is connected with the feeding device. A steel belt grating ruler corresponding to the induction groove is arranged on the side face of the buffer sleeve. According to the method and mechanism for measuring the thickness of the riveting plate, the structure is compact, the buffer sleeve can drive the feeding device to be pre-pressed on the workpiece to be riveted before riveting, the riveting precision is improved, and the thickness of the riveted workpiece is determined by measuring the position of the buffer sleeve.

Description

Technical Field

[0001] The invention relates to the field of automated machinery, and in particular to a method and a mechanism for measuring the thickness of a riveted plate. Background Art

[0002] The riveting machine (also known as riveting machine, rotary riveting machine, riveting machine, rolling riveting machine, etc.) is a new type of riveting equipment developed based on the principle of cold rolling, which refers to mechanical equipment that can rivet objects together with rivets. The current mechanism for measuring the thickness of riveted plates mostly uses a drive device such as an electric cylinder or a hydraulic cylinder to directly drive the rivet rod. The riveting operation is a direct downward pressure of the drive device, and the thickness of the workpiece to be riveted is not measured. When the thickness of the workpiece to be riveted exceeds a certain range, it will cause problems such as riveting damage or insufficient precision. Summary of the invention

[0003] The object of the present invention is to provide a method and mechanism for measuring the thickness of a riveted plate, so as to overcome the deficiencies in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An embodiment of the present invention discloses a mechanism for measuring the thickness of a riveted plate, comprising a rivet rod slidably arranged on a frame through a sleeve and a driving device for driving the rivet rod to extend and retract, a push rod connected between the driving device and the rivet rod and a buffer sleeve slidably arranged on the push rod in the sleeve, one end of the buffer sleeve close to the rivet rod protrudes from the sleeve and is connected to a feeding device, a side wall of the sleeve is provided with a sensing groove connected to the interior thereof, the sensing groove extends along the axial direction of the sleeve, the outer wall of the sleeve is provided with a grating scale reading head corresponding to the sensing groove, and the side surface of the buffer sleeve is provided with a steel belt grating scale corresponding to the sensing groove.

[0006] Furthermore, in the above-mentioned mechanism for measuring the thickness of the riveted plate, the buffer sleeve is a hollow T-shaped shaft structure, including an abutment shaft arranged close to the elastic member and a connecting shaft arranged close to the rivet rod, an abutment groove is arranged on the inner wall of one end of the abutment shaft away from the connecting shaft, and a spring abutting against the push rod is arranged.

[0007] Furthermore, in the above-mentioned mechanism for measuring the thickness of the riveted plate, a mounting groove corresponding to the steel belt grating scale is provided on the side surface of the abutment shaft.

[0008] Furthermore, in the above-mentioned mechanism for measuring the thickness of the riveted plate, countersunk holes corresponding to the grating scale reading head are respectively provided on both sides of the sensing slot, and a protective shell corresponding to the grating scale reading head is provided on the outer wall of the sleeve.

[0009] Furthermore, in the above-mentioned mechanism for measuring the thickness of the riveted plate, the side wall of the push rod is arranged on the first guide key, and the inner wall of the sleeve is provided with a guide groove corresponding to the first guide key.

[0010] Furthermore, in the above-mentioned mechanism for measuring the thickness of the riveted plate, the side wall of the push rod is provided with a second guide key, and the side wall of the connecting shaft is provided with a waist-shaped guide hole corresponding to the second guide key.

[0011] The embodiment of the present invention further discloses a method for measuring the thickness of a riveted plate using the above-mentioned mechanism, comprising the following steps:

[0012] S1, aligning the workpiece to be riveted and the mechanism for measuring the thickness of the riveted plate, and setting the riveting position and the rivet rod coaxially;

[0013] S2, the control device starts the driving device of the mechanism for measuring the thickness of the riveted plate, driving the ejector rod, the buffer sleeve, the rivet rod and the feeding device to move synchronously along the axial direction of the sleeve;

[0014] S3, the feeding device is in contact with the surface of the workpiece to be riveted, and the grating ruler reading head reads the position of the steel belt grating ruler to calculate the thickness of the workpiece to be riveted;

[0015] S4. If the thickness of the workpiece to be riveted is within the set range, the drive device continues to drive the ejector rod and the rivet rod to move and complete the riveting. Otherwise, the drive device drives the ejector rod, the buffer sleeve, the rivet rod and the feeding device to reset and alarm.

[0016] Compared with the prior art, the advantages of the present invention are: the mechanism for measuring the thickness of the riveted plate described in the present invention has a compact structure, and the buffer sleeve can drive the feeding device to pre-press the workpiece to be riveted before riveting, thereby improving the riveting accuracy. During the riveting process, the thickness of the riveted workpiece is determined by measuring the position of the buffer sleeve, thereby avoiding poor riveting accuracy or damage caused by excessive thickness of the riveted workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Shown is a schematic structural diagram of a mechanism for measuring the thickness of a riveted plate in a specific embodiment of the present invention.

[0019] Figure 2 Shown is a schematic diagram of the installation of a grating scale reading head in a specific embodiment of the present invention.

[0020] Figure 3 The figure shows the positions of the ejector rod, the buffer sleeve and the rivet rod in a specific embodiment of the present invention.

[0021] Figure 4 Shown is a schematic diagram of the decomposition of a buffer sleeve and a steel tape grating scale in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will describe the technical solutions in the embodiments of the present invention in detail in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Ginseng Figures 1 to 4 As shown, a mechanism for measuring the thickness of a riveted plate, that is, a riveting mechanism that can measure the thickness of a riveted workpiece, includes a rivet rod 2 slidably arranged on a frame through a sleeve 1 and a driving device 3 for driving the rivet rod 2 to extend and retract, a push rod 4 connected between the driving device 3 and the rivet rod 2 and a buffer sleeve 5 slidably sleeved on the push rod 4 are slidably arranged in the sleeve 1, one end of the buffer sleeve 5 close to the rivet rod 2 protrudes from the sleeve 1, and is connected to a feeding device 6, a side wall of the sleeve 1 is provided with a sensing groove 11 connected to the interior thereof, the sensing groove 11 extends along the axial direction of the sleeve 1, the outer wall of the sleeve 1 is provided with a grating scale reading head 7 corresponding to the sensing groove 11, and the side of the buffer sleeve 5 is provided with a steel belt grating scale 8 corresponding to the sensing groove 11.

[0026] In this technical solution, the frame is a C-shaped mounting frame formed by splicing or processing plates, etc., and the riveting mechanism is installed as a whole. A concave die facing the rivet rod is also provided in the frame. After the sleeve passes through the corresponding position of the frame, it is fixed to the frame through the limiting boss and nut on its outer wall. The driving device uses a conventional servo electric cylinder or hydraulic cylinder, etc., and a shaft sleeve corresponding to the buffer sleeve is provided in the end of the sleeve close to the rivet rod to provide the accuracy of the movement of the buffer sleeve. The push rod is connected to the piston rod of the driving device by means of threaded connection, etc., and the push rod and the rivet rod are driven to extend and retract by the driving device. The feeding device uses the existing feeding nozzle and other structures. During the riveting process, the driving device drives the push rod, the buffer sleeve, the rivet rod and the feeding device to move synchronously along the axial direction of the sleeve. The feeding device abuts against the surface of the workpiece to be riveted, applies a pre-tightening force to the workpiece to be riveted, avoids its displacement, etc., thereby improving the riveting accuracy. The buffer sleeve and the feeding device are synchronously stationary, and the grating scale reading head reads the optical fiber of the steel strip. The position of the scale is used to calculate the thickness of the workpiece to be riveted; when the distance moved by the buffer sleeve exceeds the set range, the thickness of the workpiece to be riveted is thinner than the qualified thickness, which will cause inadequate riveting; when the distance moved by the buffer sleeve is less than the set range, the thickness of the workpiece to be riveted is thicker than the qualified thickness, which will cause damage to the rivet, the workpiece and the rivet rod. In the above two cases, the driving device drives the ejector rod, the buffer sleeve, the rivet rod and the feeding device to reset and alarm, and check the thickness of the workpiece to be riveted; when the distance moved by the buffer sleeve is within the set range, the thickness of the workpiece to be riveted meets the requirements, and the driving device drives the ejector rod and the rivet rod to continue to complete the riveting; the mechanism for measuring the thickness of the riveted plate described in the present invention has a compact structure, and the buffer sleeve can drive the feeding device to pre-press the workpiece to be riveted before riveting, thereby improving the riveting accuracy. During the riveting process, the thickness of the riveted workpiece is determined by measuring the position of the buffer sleeve, thereby avoiding poor riveting accuracy or damage caused by the thickness of the riveted workpiece exceeding the tolerance.

[0027] For example, see Figure 3 As shown, the buffer sleeve 5 is a hollow T-shaped shaft structure, including an abutment shaft arranged close to the elastic member and a connecting shaft arranged close to the rivet rod 2. An abutment groove is arranged on the inner wall of one end of the abutment shaft away from the connecting shaft, and a spring (not shown) abutting against the push rod 4 is arranged.

[0028] In this technical solution, the buffer sleeve is elastically abutted against the push rod through a spring or the like, and does not interfere with the normal extension and contraction of the push rod. By applying an elastic force to the buffer sleeve through the spring, the workpiece to be riveted can be pre-tightened by the feeding device.

[0029] For example, see Figure 3 and Figure 4 As shown, a mounting groove corresponding to the steel tape grating scale 8 is provided on the side surface of the abutment shaft.

[0030] In this technical solution, the steel belt grating scale is fixed in the installation groove by gluing or other means, and is arranged along the axial direction of the buffer sleeve. The position of the steel belt grating scale is read by the grating scale reading head to determine the thickness of the workpiece to be riveted.

[0031] For example, see Figure 1 and Figure 2 As shown, countersunk holes corresponding to the grating scale reading head 7 are respectively provided on both sides of the sensing groove 11 , and a protective shell 9 corresponding to the grating scale reading head 7 is provided on the outer wall of the sleeve 1 .

[0032] In this technical solution, a bolt connected to the grating scale reading head by a threaded connection is provided in the countersunk hole to fix the grating scale reading head. The protective shell is a conventional sheet metal part or injection molded part, which is fixed to the outer wall of the sleeve by conventional screws, and the grating scale reading head cover is arranged therein, and at the same time the sensing slot is isolated from the outside world to prevent dust and the like from entering.

[0033] For example, see Figure 3 As shown, the side wall of the push rod 4 is arranged on the first guide key, and the inner wall of the sleeve 1 is arranged with a guide groove corresponding to the first guide key.

[0034] In this technical solution, the first guide key and the guide groove are conventional structures, which are used to limit the moving direction and rotation of the push rod.

[0035] For example, see Figure 3 As shown, the side wall of the push rod 4 is provided with a second guide key, and the side wall of the connecting shaft is provided with a waist-shaped guide hole corresponding to the second guide key.

[0036] In this technical solution, the second guide key and the waist-shaped guide hole limit the moving direction and rotation of the buffer sleeve, and cooperate with the first guide key and guide groove to ensure that the steel belt grating scale can only move along the axial direction of the buffer sleeve, thereby ensuring that the grating scale reading head can read the position of the steel belt grating scale.

[0037] A method for measuring the thickness of a riveted workpiece using the above mechanism comprises the following steps:

[0038] S1, aligning the workpiece to be riveted and the mechanism for measuring the thickness of the riveted plate, and setting the riveting position and the rivet rod 2 coaxially;

[0039] S2, the control device starts the driving device 3 of the mechanism for measuring the thickness of the riveted plate, driving the ejector rod 4, the buffer sleeve 5, the rivet rod 2 and the feeding device 6 to move synchronously along the axial direction of the sleeve 1. The control device can use the control device of the existing riveting mechanism;

[0040] S3, the feeding device 6 is in contact with the surface of the workpiece to be riveted, and the grating ruler reading head 7 reads the position of the steel belt grating ruler 8 to calculate the thickness of the workpiece to be riveted;

[0041] S4. If the thickness of the workpiece to be riveted is within the set range, the driving device 3 continues to drive the ejector rod 4 and the rivet rod 2 to move and complete the riveting. Otherwise, the driving device 3 drives the ejector rod 4, the buffer sleeve 5, the rivet rod 2 and the feeding device 6 to reset and sound an alarm.

[0042] In this technical solution, the thickness of the riveted workpiece can be measured during the riveting process without interfering with the normal riveting process, thereby improving overall work efficiency. The existing riveting mechanism can also be modified by opening a sensing groove on the sleeve and installing a grating scale reading head, and then installing a steel belt grating scale on the side of the buffer sleeve. There is no need to replace the sleeve and buffer sleeve, thus saving costs.

[0043] To sum up, the mechanism for measuring the thickness of the riveted plate described in the present invention has a compact structure. The buffer sleeve can drive the feeding device to pre-press the workpiece to be riveted before riveting, thereby improving the riveting accuracy. During the riveting process, the thickness of the riveted workpiece is determined by measuring the position of the buffer sleeve, thereby avoiding poor riveting accuracy or damage caused by excessive thickness of the riveted workpiece.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The above description is only a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A mechanism for measuring the thickness of a riveted plate, characterized in that: It includes a rivet rod slidably arranged on a frame through a sleeve and a driving device for driving the rivet rod to extend and retract, a push rod connected between the driving device and the rivet rod and a buffer sleeve slidably sleeved on the push rod are slidably arranged in the sleeve, one end of the buffer sleeve close to the rivet rod protrudes from the sleeve and is connected to a feeding device, a side wall of the sleeve is provided with a sensing groove connected to the interior thereof, the sensing groove extends along the axial direction of the sleeve, the outer wall of the sleeve is provided with a grating scale reading head corresponding to the sensing groove, and the side surface of the buffer sleeve is provided with a steel belt grating scale corresponding to the sensing groove.

2. The mechanism for measuring the thickness of riveted plates according to claim 1, characterized in that: The buffer sleeve is a hollow T-shaped shaft structure, including an abutment shaft arranged close to the elastic member and a connecting shaft arranged close to the rivet rod. An abutment groove is arranged on the inner wall of one end of the abutment shaft away from the connecting shaft, and a spring abutting against the push rod is arranged.

3. The mechanism for measuring the thickness of riveted plates according to claim 2, characterized in that: The side surface of the abutment shaft is provided with a mounting groove corresponding to the steel tape grating scale.

4. The mechanism for measuring the thickness of riveted plates according to claim 1, characterized in that: Countersunk holes corresponding to the grating scale reading head are respectively arranged on both sides of the sensing groove, and a protective shell corresponding to the grating scale reading head is arranged on the outer wall of the sleeve.

5. The mechanism for measuring the thickness of riveted plates according to claim 1, characterized in that: The side wall of the push rod is arranged on the first guide key, and the inner wall of the sleeve is arranged on the guide groove corresponding to the first guide key.

6. The mechanism for measuring the thickness of riveted plates according to claim 1, characterized in that: The side wall of the push rod is provided with a second guide key, and the side wall of the connecting shaft is provided with a waist-shaped guide hole corresponding to the second guide key.

7. A method for measuring the thickness of a riveted plate using the mechanism for measuring the thickness of a riveted plate according to any one of claims 1 to 7, characterized in that: Includes steps: S1, aligning the workpiece to be riveted and the mechanism for measuring the thickness of the riveted plate, and setting the riveting position and the rivet rod coaxially; S2, the control device starts the driving device of the mechanism for measuring the thickness of the riveted plate, driving the ejector rod, the buffer sleeve, the rivet rod and the feeding device to move synchronously along the axial direction of the sleeve; S3, the feeding device is in contact with the surface of the workpiece to be riveted, and the grating ruler reading head reads the position of the steel belt grating ruler to calculate the thickness of the workpiece to be riveted; S4. If the thickness of the workpiece to be riveted is within the set range, the drive device continues to drive the ejector rod and the rivet rod to move and complete the riveting. Otherwise, the drive device drives the ejector rod, the buffer sleeve, the rivet rod and the feeding device to reset and alarm.

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