Auxiliary jig for CMM measurement

Abstract

The utility model discloses a CMM measurement auxiliary jig, which comprises a first pressing plate structure, a second pressing plate structure, a first sliding table air cylinder, a second sliding table air cylinder, a positioning frame, an original point calibration block, a pneumatic system and a supporting plate, the first sliding table air cylinder, the second sliding table air cylinder, the positioning frame and the original point calibration block are all installed on the supporting plate, the positioning frame is provided with a containing cavity, and the pneumatic system is arranged in the containing cavity. A containing cavity is formed in the positioning frame, a backrest block is arranged on the side wall of the containing cavity, the first pressing plate structure is connected to the first sliding table air cylinder, the second pressing plate structure is connected to the second sliding table air cylinder, the first pressing plate structure and the second pressing plate structure can abut against the positioning frame, and the pneumatic system is connected with the first sliding table air cylinder and the second sliding table air cylinder. The CMM fixing device can be used for vertical fixation of workpieces to adapt to fixation and measurement of high-gravity-center workpieces such as new energy battery covers, the workpieces are fixed at the same position every time, and the CMM is fixed on the original point calibration block, so that the CMM can directly perform measurement without correction, and the measurement efficiency is high.

Description

Technical Field

[0001] The utility model relates to the field of mechanical design, in particular to a CMM measurement auxiliary fixture. Background Art

[0002] For some precision workpieces, their dimensions often need to be measured after they are manufactured to ensure that their dimensions meet the requirements. CMM (Coordinate Measuring Machine) can directly measure the dimensions of workpieces in three-dimensional space. It is easy to use and has high measurement efficiency.

[0003] However, when measuring existing workpieces, they are often placed flat on the workbench for direct measurement. Under the above method, on the one hand, it is difficult to effectively measure workpieces with a high center of gravity that are not easy to place flat, such as new energy battery covers, and on the other hand, after each placement on the workbench, it is difficult to ensure that the placement position is the same each time, and the measurement origin of the CMM needs to be calibrated for each measurement, which is time-consuming and labor-intensive, affecting the measurement efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a CMM measurement auxiliary fixture, which can solve one or more of the above problems.

[0005] According to one aspect of the utility model, a CMM measurement auxiliary fixture is provided, including a first pressure plate structure, a second pressure plate structure, a first slide cylinder, a second slide cylinder, a positioning frame, an origin calibration block, a pneumatic system and a support plate, the first slide cylinder, the second slide cylinder, the positioning frame and the origin calibration block are all installed on the support plate, the positioning frame is provided with a accommodating cavity, and a backrest block is provided on the side wall of the accommodating cavity, the first pressure plate structure is connected to the first slide cylinder, the second pressure plate structure is connected to the second slide cylinder, the first pressure plate structure and the second pressure plate structure can both rest on the positioning frame, and the pneumatic system is connected to the first slide cylinder and the second slide cylinder.

[0006] The beneficial effect of the utility model is as follows: in the utility model, the workpiece to be measured by the CMM can be placed in the accommodating cavity and lean against the backrest block, and then the first slide cylinder and the second slide cylinder can be relied on to press the workpiece on the positioning frame, so that the workpiece can be effectively fixed on the positioning frame, and the CMM can be fixedly installed on the origin calibration block to measure the workpiece on the positioning frame. Therefore, the utility model can be used for vertical fixation of workpieces to adapt to the fixation of high-center-of-gravity workpieces such as new energy battery covers, and the workpiece is fixed in the same position each time. In addition, the CMM is fixed on the origin calibration block, so the CMM can directly measure without correction, with high measurement efficiency and strong reliability.

[0007] In some embodiments, the first pressure plate structure includes a first pressure plate, a first vertical plate and a first connecting block, the first connecting block is connected to the first slide cylinder, the first connecting block is connected to the first vertical plate, and the first pressure plate is connected to the first vertical plate.

[0008] In some embodiments, the first pressing plate is provided with a first protrusion, and the first protrusion can extend to the accommodating cavity. The first protrusion is used for the first pressing plate to abut against the workpiece, which can reduce the contact with the workpiece, thereby reducing the problems such as scratches on the workpiece.

[0009] In some embodiments, the second pressure plate structure includes a second pressure plate, a second vertical plate and a second connecting block, the second connecting block is connected to the second slide cylinder, the second connecting block is connected to the second vertical plate, and the second pressure plate is connected to the second vertical plate.

[0010] In some embodiments, the second pressing plate is provided with a second protrusion, and the second protrusion can extend to the accommodating cavity. The first protrusion is used for the second pressing plate to abut against the workpiece, which can reduce the contact with the workpiece, thereby reducing the problems such as scratches on the workpiece.

[0011] In some embodiments, the pneumatic system includes a manual valve and an air pressure regulating valve, both of which are mounted on a support plate, the manual valve and the air pressure regulating valve are connected, and the air pressure regulating valve is connected to both the first slide cylinder and the second slide cylinder. The manual valve can facilitate the user to manually switch the operation of the first slide cylinder and the second slide cylinder, and the air pressure regulating valve can be used to adjust the intensity of the work entering the first slide cylinder and the second slide cylinder, thereby adjusting the movement efficiency of the first pressure plate structure and the second pressure plate structure.

[0012] In some embodiments, the utility model further comprises a stopper, an elastic member and a connecting plate, the positioning frame is provided with a groove, the groove is communicated with the accommodating cavity, the stopper is slidably arranged on the groove, the stopper is connected to one end of the elastic member, the other end of the elastic member is connected to the connecting plate, and the connecting plate is connected to the positioning frame. When the workpiece is placed in the accommodating cavity, its side can be abutted by the stopper under the action of the elastic member, the setting of the elastic member can make the accommodating cavity adaptable to the use of workpieces of various sizes, thereby improving the scope of application of the utility model, and in addition, the setting of the groove can guide and limit the movement of the stopper, thereby avoiding the movement of the stopper from being dislocated.

[0013] In some embodiments, the utility model further comprises a handle, wherein the handle is connected to the support plate, and the handle can facilitate the movement of the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1The figure is a schematic diagram of the structure of a CMM measurement auxiliary fixture according to one embodiment of the utility model.

[0015] Figure 2 The figure is a schematic diagram of the structure of a CMM measurement auxiliary fixture according to one embodiment of the utility model.

[0016] Figure 3 It is a cross-sectional view of a schematic structural diagram of a positioning frame of a CMM measurement auxiliary fixture at an elastic member according to an embodiment of the utility model.

[0017] Figure 4 A schematic diagram of the use of a CMM measurement auxiliary fixture according to an embodiment of the utility model.

[0018] In the figure: 1. first pressure plate structure, 2. second pressure plate structure, 3. first slide cylinder, 4. second slide cylinder, 5. positioning frame, 6. origin calibration block, 7. pneumatic system, 8. support plate, 9. stop block, 10. elastic member, 20. connecting plate, 30. handle, 40. workpiece, 11. first pressure plate, 12. first vertical plate, 13. first connecting block, 111. first protrusion, 21. second pressure plate, 22. second vertical plate, 23. second connecting block, 211. second protrusion, 51. accommodating chamber, 511. backrest block, 52. groove, 71. manual valve, 72. air pressure regulating valve. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The utility model discloses a CMM measurement auxiliary fixture, comprising a first pressing plate structure 1, a second pressing plate structure 2, a first slide cylinder 3, a second slide cylinder 4, a positioning frame 5, an origin calibration block 6, a pneumatic system 7 and a support plate 8.

[0021] The slide cylinder is also called a linear cylinder, and the first slide cylinder 3 is fixedly connected to the support plate 8 through a bottom block, and the second slide cylinder 4 is fixedly connected to the support plate 8 through another bottom block.

[0022] The positioning frame 5 is fixedly mounted on the support plate 8 by bolts. The positioning frame 5 is provided with a receiving cavity 51 . A backrest block 511 is provided on the side wall of the receiving cavity 51 . A workpiece can be placed in the receiving cavity 51 , and the workpiece placed in the receiving cavity 51 can rest against the backrest block 511 .

[0023] The first pressing plate structure 1 and the second pressing plate structure 2 are respectively arranged on the left and right sides of the positioning frame 5 .

[0024] The first pressing plate structure 1 includes a first pressing plate 11, a first vertical plate 12 and a first connecting block 13. The first connecting block 13 is connected to the first slide cylinder 3 by bolts, so that the first slide cylinder 3 can drive the first connecting block 13 to move linearly, the first vertical plate 12 is arranged perpendicular to the support plate 8, the bottom of the first vertical plate 12 and the first connecting block 13 are fixedly connected by bolts, and the first pressing plate 11 is fixedly connected to one side of the top of the first vertical plate 12 by bolts.

[0025] Driven by the first slide cylinder 3, the first pressure plate structure 1 can move forward and backward toward the positioning frame 5, and the first pressure plate 11 can be pressed against the positioning frame 5 when needed, and a first protrusion 111 is provided on one side of the first pressure plate 11. When the first pressure plate 11 is pressed against the positioning frame 5, the first protrusion 111 can extend to the accommodating cavity 51.

[0026] The second pressing plate structure 2 includes a second pressing plate 21, a second vertical plate 22, and a second connecting block 23. The second connecting block 23 is connected to the second slide cylinder 4 by bolts, so that the second slide cylinder 4 can drive the second connecting block 23 to move linearly, the second vertical plate 22 is arranged perpendicular to the support plate 8, the bottom of the second vertical plate 22 is fixedly connected to the second connecting block 23 by bolts, and the second pressing plate 21 is fixedly connected to one side of the top of the second vertical plate 22 by bolts.

[0027] Driven by the second slide cylinder 4, the second pressure plate structure 2 can move forward and backward toward the positioning frame 5, and the second pressure plate 11 can be pressed against the positioning frame 5 when necessary, and a second protrusion 211 is provided on one side of the second pressure plate 21. When the second pressure plate 21 is pressed against the positioning frame 5, the second protrusion 211 can extend to the accommodating cavity 51.

[0028] The pneumatic system 7 includes a manual valve 71 and an air pressure regulating valve 72. The manual valve 71 and the air pressure regulating valve 72 are respectively fixedly mounted on the support plate 8 through a base, the manual valve 71 and the air pressure regulating valve 72 are connected through a pipeline, and the first slide cylinder 3 and the second slide cylinder 4 are respectively connected to the air pressure regulating valve 72 through a pipeline.

[0029] The origin calibration block 6 is fixedly mounted on the support plate 8 by means of bolts.

[0030] The utility model also includes a stopper 9, an elastic member 10 and a connecting plate 20. The positioning frame 5 is provided with a groove 52, the groove 52 is communicated with the accommodating cavity 51, the stopper 9 is slidably embedded in the groove 52, the elastic member 10 can preferably be a spring, the stopper 9 is fixedly connected to one end of the elastic member 10, the other end of the elastic member 10 is fixedly connected to the connecting plate 20, the connecting plate 20 is fixedly connected to the positioning frame 5 by bolts, and under the action of the elastic member 10, the stopper 9 can extend into the accommodating cavity 51.

[0031] The utility model further comprises a handle 30 , and the handle 30 can preferably be two, and the two handles 30 are respectively fixedly connected to the two sides of the support plate 8 by bolts. The arrangement of the handle 30 can facilitate the movement of the utility model.

[0032] When the utility model is in use, the CMM can be fixedly connected to the origin calibration block 6 by bolts, and the manual valve 71 can be connected to an external air supply source through a pipeline.

[0033] The workpiece 40 to be measured can be placed in the accommodating cavity 51 of the positioning frame 5 and abut against the backrest block 511. At this time, under the action of the elastic member 10, the abutment block 9 can abut against the workpiece 40 in the accommodating cavity 51, and the workpiece 40 can be preliminarily fixed on the accommodating cavity 51.

[0034] Then, the manual valve 71 is opened so that the external air supply source can supply air to the first slide cylinder 3 and the second slide cylinder 4. Under the operation of the first slide cylinder 3 and the second slide cylinder 4, the first pressure plate structure 1 and the second pressure plate structure 2 move accordingly, so that the first pressure plate 11 and the second pressure plate 21 can be pressed on the workpiece 40, so that the workpiece 40 can be effectively fixed in the accommodating cavity 51. In addition, the user can effectively adjust the air supply pressure of the external air supply source to the first slide cylinder 3 and the second slide cylinder 4 by adjusting the air pressure regulating valve 72, so as to effectively adjust the movement efficiency of the first pressure plate structure 1 and the second pressure plate structure 2.

[0035] Finally, the workpiece 40 is measured by the CMM to effectively measure the size of the workpiece 40 , so as to facilitate the determination of whether the size of the workpiece 40 meets the requirements.

[0036] After the measurement is completed, the first slide cylinder 3 and the second slide cylinder 4 can be started again so that the first pressure plate 11 and the second pressure plate 21 are no longer pressed on the workpiece 40, and the workpiece 40 is removed from the accommodating cavity 51 by applying force, and the next measurement can be carried out.

[0037] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. CMM measurement auxiliary fixture, characterized by: It includes a first pressure plate structure, a second pressure plate structure, a first slide cylinder, a second slide cylinder, a positioning frame, an origin calibration block, a pneumatic system and a support plate. The first slide cylinder, the second slide cylinder, the positioning frame and the origin calibration block are all installed on the support plate. The positioning frame is provided with a accommodating cavity. A backrest block is provided on the side wall of the accommodating cavity. The first pressure plate structure is connected to the first slide cylinder, and the second pressure plate structure is connected to the second slide cylinder. The first pressure plate structure and the second pressure plate structure can both rest on the positioning frame, and the pneumatic system is connected to the first slide cylinder and the second slide cylinder.

2. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The first pressing plate structure includes a first pressing plate, a first vertical plate and a first connecting block, the first connecting block is connected to the first slide cylinder, the first connecting block is connected to the first vertical plate, and the first pressing plate is connected to the first vertical plate.

3. The CMM measurement auxiliary fixture according to claim 2, characterized in that: The first pressing plate is provided with a first protrusion, and the first protrusion can extend to the accommodating cavity.

4. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The second pressing plate structure includes a second pressing plate, a second vertical plate and a second connecting block, the second connecting block is connected to the second slide cylinder, the second connecting block is connected to the second vertical plate, and the second pressing plate is connected to the second vertical plate.

5. The CMM measurement auxiliary fixture according to claim 4, characterized in that: The second pressing plate is provided with a second protrusion, and the second protrusion can extend to the accommodating cavity.

6. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The pneumatic system includes a manual valve and an air pressure regulating valve, both of which are mounted on a support plate, the manual valve and the air pressure regulating valve are connected, and the air pressure regulating valve is connected to the first slide cylinder and the second slide cylinder.

7. The CMM measurement auxiliary fixture according to claim 1, characterized in that: It includes a stop block, an elastic member and a connecting plate. The positioning frame is provided with a groove, the groove is communicated with the accommodating cavity, the stop block is slidably arranged on the groove, the stop block is connected to one end of the elastic member, the other end of the elastic member is connected to the connecting plate, and the connecting plate is connected to the positioning frame.

8. The CMM measurement auxiliary fixture according to claim 1, characterized in that: A handle is included, and the handle is connected to the supporting plate.

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