CMM measurement auxiliary tool and measurement system

Abstract

The utility model provides a CMM measurement auxiliary tool and a measurement system, the CMM measurement auxiliary tool comprises a pedestal, a vertical plate, a fixed seat and a pressing assembly, the vertical plate is installed on the pedestal, the fixed seat is installed on the top of the vertical plate, the fixed seat is provided with a positioning accommodation cavity, the positioning accommodation cavity is recessed from the top surface of the fixed seat to the bottom of the fixed seat, and the pressing assembly is installed on the vertical plate. The pressing assembly comprises a sliding rod, an elastic piece and a pressing block, the sliding rod extends in the height direction of the base, the sliding rod is slidably connected with the fixing base in the height direction, the pressing block is installed on the sliding rod and located above the fixing base, the elastic piece forces the sliding rod to move towards the base, and a clamping position is formed between the pressing block and the positioning containing cavity. The measurement system is provided with the CMM measurement auxiliary tool, and the CMM measurement auxiliary tool can quickly disassemble and assemble a workpiece, and is simple and convenient to operate and good in clamping and fixing effect.

Description

Technical Field

[0001] This utility model relates to the field of measurement technology, specifically to a CMM measurement auxiliary tooling and a measurement system equipped with the CMM measurement auxiliary tooling. Background Technology

[0002] In today's industrial manufacturing field, coordinate measuring machines (CMMs) play a crucial role. When measuring workpieces, the conventional practice is to directly fix the workpiece onto the CMM's built-in worktable. However, if a different method is used... Figure 1 The auxiliary fixture 9 shown clamps and fixes the workpiece. When using this auxiliary fixture 9, an appropriate number of fixtures 9 are selected according to the shape of the workpiece. First, the auxiliary fixtures 9 are distributed and installed on the worktable of the coordinate measuring machine according to the shape of the workpiece. Specifically, the base 91 of each auxiliary fixture 9 is connected to the connecting hole on the worktable of the coordinate measuring machine via bolts. Next, the fixing limit of the pressure plate 93 is loosened by using a wrench, and the workpiece is moved below the pressure plate 93 of each auxiliary fixture 9. Then, the adjusting bolt 92 is tightened by using a wrench, causing the nut part of the bolt to press down on the pressure plate 93, and the pressure plate 93 presses the workpiece firmly onto the worktable of the coordinate measuring machine, thereby achieving workpiece fixation. However, using this auxiliary fixture 9 to fix the workpiece has the following shortcomings:

[0003] First, when fixing the workpiece, special tools (such as wrenches) are needed to adjust the screws of each auxiliary tool 9 in order to adjust the position of the pressure plate 93 and clamp or release the workpiece. Therefore, the entire disassembly and assembly process is cumbersome, time-consuming and labor-intensive, which is not conducive to improving measurement efficiency.

[0004] Secondly, since the positions of the connecting holes on the worktable of the coordinate measuring machine are fixed, when the shape of the workpiece does not match the distribution of the connecting holes well, the clamping and fixing effect of the auxiliary tooling 9 on the workpiece will be reduced.

[0005] Third, if the side of the workpiece facing the coordinate measuring machine's worktable is not planar or horizontal, auxiliary blocks of a specific shape are required to support the workpiece so that the auxiliary fixture 9 can firmly and stably fix the workpiece on the worktable of the coordinate measuring machine. Among these, the auxiliary blocks usually require special blocks, which can easily increase costs. Moreover, each time the workpiece is fixed, the positions of multiple blocks need to be adjusted to ensure that the workpiece is stably and reliably fixed in the required posture. Therefore, the entire installation process is cumbersome, time-consuming, labor-intensive, and has low measurement efficiency. Summary of the Invention

[0006] In order to solve the above problems, the utility model discloses a main purpose is to provide a kind of CMM measuring auxiliary tooling that can quickly disassembles and assembles workpiece, and operation is simple and convenient, clamping and fixing effect is good.

[0007] Another purpose of the utility model is to provide a kind of measurement system with the above CMM measuring auxiliary tooling.

[0008] In order to realize the main purpose of the utility model, the utility model provides a kind of CMM measuring auxiliary tooling, including base, wherein, still including vertical plate, fixed base and compression assembly, vertical plate is installed on base, fixed base is installed on the top of vertical plate, fixed base has locating accommodating cavity, locating accommodating cavity is recessed from the top surface of fixed base to the bottom of fixed base, compression assembly includes slide rod, elastic member and pressing block, slide rod extends along the height direction of base, slide rod is slidably connected with fixed base in height direction, pressing block is installed on slide rod and is located above fixed base, elastic member forces slide rod to move towards base, so that clamping position is formed between pressing block and locating accommodating cavity.

[0009] From the above, when needing to clamp and fix workpiece, first push slide rod, make slide rod drive pressing block to move away from fixed base, so that the workpiece to be measured is placed into locating accommodating cavity on fixed base, so that locating accommodating cavity supports and positions the workpiece to be measured, then release the push to slide rod, make slide rod drive pressing block to move towards fixed base under the action of elastic member, and then make pressing block clamp and fix the workpiece to be measured in locating accommodating cavity. Through the design of CMM measuring auxiliary tooling, manual operation can be realized when disassembling and assembling the workpiece to be measured, without the aid of external tools, and under the assistance of locating accommodating cavity of fixed base, fixed base can accurately position the workpiece to be measured in measured posture, so that it is not necessary to additionally set supporting pad to support and adjust the posture of the workpiece to be measured, which is beneficial to quickly disassembling and assembling the workpiece to be measured, and makes the disassembling and assembling operation more simple and convenient, and also ensures the clamping and fixing effect of the workpiece to be measured.

[0010] One preferred scheme is that supporting pad is arranged in locating accommodating cavity; and / or the inner side wall of locating accommodating cavity is protruded to form protruding block.

[0011] From the above, supporting pad is used to adapt to the uneven surface of the side where the workpiece to be measured is placed, so as to ensure that the workpiece to be measured can be stably and reliably clamped and fixed, and also ensure the accurate posture required when measuring the workpiece to be measured; and supporting pad is formed in locating accommodating cavity, so that it is not necessary to additionally make and install supporting pad, which effectively saves the disassembling and assembling time when measuring the workpiece to be measured.

[0012] Another preferred solution is that the elastic member is a compression spring, the slide rod is provided with a limiting portion, the limiting portion is below the fixed seat, the compression spring is sleeved on the slide rod, and the compression spring abuts between the limiting portion and the fixed seat, or the elastic member is a tension spring, the tension spring is above the fixed seat, a first end of the tension spring is connected with the fixed seat, and a second end of the tension spring is connected with the slide rod or the pressing block; the slide rod can rotate relative to the fixed seat about an axis of the slide rod.

[0013] As can be seen, the design enables the elastic member to stably and reliably force the slide rod to drive the pressing block to move towards the fixed seat, and ensures that the pressing block has sufficient pressing force on the measured workpiece to prevent the measured workpiece from being deviated in position during measurement; and the rotation of the slide rod relative to the fixed seat makes the disassembly and assembly of the measured workpiece more convenient.

[0014] Another preferred solution is that a sinking groove portion is arranged at the top of the fixed seat at the pressing block, the sinking groove portion is recessed from the top of the fixed seat to the bottom of the fixed seat; when the pressing block is in the pressing state, a part of the pressing block is located in the sinking groove portion and abuts with a groove wall of the sinking groove portion, so that the sinking groove portion limits the rotation of the slide rod to drive the pressing block relative to the fixed seat about an axis of the slide rod.

[0015] As can be seen, the design can prevent the pressing block from being separated from the measured workpiece due to rotation during measurement, thereby ensuring the reliability of the pressing block and the fixed seat in clamping and fixing the measured workpiece.

[0016] Another preferred solution is that the pressing block is threadedly connected with the slide rod; or the pressing block is in interference fit with the slide rod.

[0017] As can be seen, the design can ensure the reliability of the connection between the pressing block and the slide rod, thereby also ensuring the reliability of the pressing block in pressing the measured workpiece; and the thread connection between the pressing block and the slide rod also enables the pressing block to be replaceable.

[0018] Another preferred solution is that the number of the pressing assemblies is two or more, and the two or more pressing assemblies are distributed along a length direction of the positioning accommodating cavity; in a width direction of the positioning accommodating cavity, the two or more pressing assemblies are all distributed on a same side of the positioning accommodating cavity, or part of the pressing assemblies are distributed on a first side of the positioning accommodating cavity and the other part of the pressing assemblies are distributed on a second side of the positioning accommodating cavity.

[0019] As can be seen, the design is conducive to improving the reliability of the pressing assemblies in pressing the measured workpiece.

[0020] A further solution is that part or all of the pressing blocks are provided with avoiding grooves, the avoiding grooves penetrate the pressing plates in a height direction, or the avoiding grooves are recessed from the bottom of the pressing blocks to the top of the pressing blocks in the height direction.

[0021] As can be seen from the above, the forming of the avoiding groove on the pressing block enables the avoiding groove to avoid individual protruding parts on the measured workpiece when the pressing block presses the measured workpiece, so that the pressing block can better press the measured workpiece, thereby ensuring the pressing and fixing effect on the measured workpiece.

[0022] Further, the base is provided with a connecting hole penetrating through the base in the height direction, and / or the bottom of the base is provided with a guide rail part; and the end of the sliding rod away from the fixing base is formed with an operation part, and the operation part is provided with an anti-skid structure.

[0023] As can be seen from the above, the base is convenient for quick and reliable connection with the workbench of the measuring equipment or the guide rail groove plate installed on the workbench.

[0024] In order to achieve another purpose of the present application, the present application provides a measuring system comprising a measuring equipment, wherein the CMM measuring auxiliary tool is also included, and the CMM measuring auxiliary tool is installed on the workbench of the measuring equipment.

[0025] As can be seen from the above, the measuring system is provided with the CMM measuring auxiliary tool, so that the disassembly and assembly of the measured workpiece are more convenient, easy to operate and time-saving and labor-saving when the measured workpiece is measured, which is beneficial to greatly improving the measuring efficiency and reducing the production cost and time cost.

[0026] Further, the measuring system further comprises a guide rail groove plate, and the guide rail groove plate is provided with a guide groove; the guide rail groove plate is detachably installed on the workbench, and the CMM measuring auxiliary tool is detachably installed on the guide rail groove plate.

[0027] As can be seen from the above, the guide rail groove plate makes the installation of the CMM measuring auxiliary tool on the workbench more convenient, and is also beneficial to the disassembly and assembly of the measuring equipment and other CMM measuring auxiliary tools of the measured products. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is an existing auxiliary tool for clamping and fixing the measured workpiece by the measuring equipment.

[0029] Figure 2 is a structural diagram of the CMM measuring auxiliary tool embodiment of the present application.

[0030] Figure 3 is a structural diagram of the fixing seat of the CMM measuring auxiliary tool embodiment of the present application.

[0031] Figure 4 is a structural diagram of the CMM measuring auxiliary tool embodiment of the present application after omitting part of the components.

[0032] The present application will be further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0033] Embodiment of CMM measurement auxiliary tool

[0034] Reference Figure 2 The CMM measurement auxiliary tool 100 comprises a base 1, a vertical plate 2, a fixing seat 3 and a pressing assembly 4. The bottom of the base 1 is preferably provided with a guide rail part 11, which is preferably a dovetail guide rail part 11. By providing the guide rail part 11 on the bottom of the base 1, when the CMM measurement auxiliary tool 100 is placed on the workbench of the measuring equipment (such as a three-coordinate measuring machine (CMM)), it can be assembled with the guide rail groove of the guide rail groove plate installed on the workbench, thereby ensuring the firmness and reliability of the installation of the CMM measurement auxiliary tool 100 on the workbench of the measuring equipment, and also making it more convenient and easy to operate when the CMM measurement auxiliary tool 100 is installed on the workbench of the measuring equipment. Of course, as one of the other optional solutions, the guide rail part 11 can also be a reverse T-shaped guide rail part 11, that is, the shape of the guide rail part 11 can be matched with the shape of the guide rail groove of the guide rail groove plate on the workbench of the measuring equipment. As still another optional solution, a connecting hole can also be provided on the base 1, which penetrates the base 1 in the height direction of the CMM measurement auxiliary tool 100, so that the base 1 can also be directly connected with the connecting hole on the workbench of the measuring equipment through the connecting hole. The base 1 can be provided with both the guide rail part 11 and the connecting hole at the same time, and the connecting hole is used to connect with the guide rail groove plate on the workbench of the measuring equipment at this time.

[0035] The vertical plate 2 is preferably installed on the top of the base 1, and the fixing seat 3 is installed on the top of the vertical plate 2. Figure 3 The fixing seat 3 has a positioning accommodating cavity 31, which is recessed from the top surface of the fixing seat 3 to the bottom of the fixing seat 3, and is used to support and position the measured workpiece.

[0036] Preferably, a support pad 311 can be formed in the positioning accommodating cavity 31, which is used to adapt to the uneven surface of the placement side of the measured workpiece, so as to ensure that the measured workpiece can be stably and reliably clamped and fixed, and also ensure that the posture required when the measured workpiece is measured is accurate and the measured workpiece can be supported. Furthermore, a protrusion 312 can be protrudingly formed on the inner side wall of the positioning accommodating cavity 31, which can cooperate with the groove on the measured workpiece to assist the positioning accommodating cavity 31 to better position the measured workpiece, and the protrusion 312 and / or the support pad 311 can also play a foolproof role.

[0037] Combining Figure 4The pressing assembly 4 comprises a slide rod 41, an elastic member 42 and a pressing block 43. The slide rod 41 extends along the height direction of the base 1, and the slide rod 41 is in sliding connection with the fixed seat 3 in the height direction of the base 1.

[0038] The pressing block 43 is installed on the slide rod 41 and located above the fixed seat 3. Preferably, the pressing block 43 and the slide rod 41 are in threaded connection, so as to ensure the reliability of the connection between the pressing block 43 and the slide rod 41, the reliability of the pressing of the pressing block 43 on the measured workpiece, and the replaceability of the pressing block 43. Alternatively, the pressing block 43 and the slide rod 41 can be in interference fit, i.e. the pressing block 43 is provided with a connecting hole, and the slide rod 41 passes through the connecting hole and is in interference fit with the connecting hole.

[0039] The elastic member 42 is used to force the slide rod 41 to move towards the base 1, so as to form a clamping position between the pressing block 43 and the positioning accommodating cavity 31 of the fixed seat 3, thereby reliably clamping and fixing the measured workpiece in the positioning accommodating cavity 31. When the pressing block 43 cooperates with the positioning accommodating cavity 31 to position and clamp the measured workpiece, at least a part of the projection of the pressing block 43 overlaps at least a part of the projection of the positioning accommodating cavity 31 in the height direction of the base 1, thereby ensuring that the pressing block 43 can press and fix the measured workpiece in the positioning accommodating cavity 31.

[0040] In this embodiment, the elastic member 42 is a compression spring, and the slide rod 41 is provided with a limiting portion 411 located below the fixed seat 3. The compression spring is sleeved on the slide rod 41 and abuts between the bottom of the fixed seat 3 and the limiting portion 411. This design enables the elastic member 42 to stably and reliably force the slide rod 41 to drive the pressing block 43 to move towards the fixed seat 3, and ensures that the pressing block 43 has sufficient pressing force on the measured workpiece, thereby preventing the measured workpiece from shifting during measurement. The slide rod 41 can also rotate about its own axis relative to the fixed seat 3, and the rotation of the slide rod 41 relative to the fixed seat 3 makes the disassembly and assembly of the measured workpiece more convenient.

[0041] When it is necessary to install the measured workpiece, the slide rod 41 is pushed to drive the pressing block 43 to move away from the fixed seat 3, and then the slide rod 41 is rotated to drive the pressing block 43 to rotate away from the positioning accommodating cavity 31, and then the slide rod 41 is released to drive the pressing block 43 to move towards the fixed seat 3 under the action of the elastic member 42. At this time, since the pressing block 43 is not above the positioning accommodating cavity 31, the measured workpiece can be placed into the positioning accommodating cavity 31 without interference from the pressing block 43, and it is not necessary to simultaneously push multiple slide rods 41 to keep multiple pressing blocks 43 moving away from the fixed seat 3 at the same time.

[0042] When it is needed to disassemble the measured workpiece, the pushing slide rod 41 moves the slide rod 41 and the pressing block 43 away from the fixed base 3, then rotates the slide rod 41 to make the pressing block 43 rotate away from the positioning accommodating cavity 31, and then releases the slide rod 41, so that the slide rod 41 and the pressing block 43 move to the fixed base 3 under the action of the elastic member 42. At this time, since the pressing block 43 is not above the positioning accommodating cavity 31, the measured workpiece is not interfered by the pressing block 43 when being taken out of the positioning accommodating cavity 31, and multiple slide rods 41 are not needed to be pushed at the same time to make multiple pressing blocks 43 keep moving away from the fixed base 3 at the same time.

[0043] It should be noted that as one of the other optional solutions, in other embodiments, the elastic member 42 can also be a tension spring. When the elastic member 42 is a tension spring, the tension spring is located above the fixed base 3, the first end of the tension spring is connected with the fixed base 3, and the second end of the tension spring is connected with the slide rod 41 or the pressing block 43.

[0044] Preferably, the end of the slide rod 41 away from the fixed base 3 is shaped with an operation part 412, and the operation part 412 is provided with an anti-skid structure 4121. This design enables the user to more conveniently and reliably operate the rotation and sliding of the slide rod 41 relative to the fixed base 3.

[0045] Further, to prevent the pressing block 43 from being separated from the measured workpiece due to rotation during measurement and to ensure the reliability of the clamping and fixing of the measured workpiece by the pressing block 43 and the fixed base 3, a sunken groove part 32 is formed at the top of the fixed base 3 at the pressing block 43, and the sunken groove part 32 is recessed from the top of the fixed base 3 to the bottom of the fixed base 3. When the pressing block 43 is in a pressing state, a part of the pressing block 43 is located in the sunken groove part 32 and abuts against the groove wall of the sunken groove part 32, so that the sunken groove part 32 limits the rotation of the slide rod 41 and the pressing block 43 relative to the fixed base 3 about the axis of the slide rod 41. More preferably, the sunken groove part 32 extends along the width direction of the fixed base 3.

[0046] Further, the number of the pressing assemblies 4 is preferably two or more to improve the reliability of the pressing of the measured workpiece by the pressing assemblies 4. Among them, the two or more pressing assemblies 4 are distributed along the length direction of the positioning accommodating cavity 31, and in this embodiment, a part of the pressing assemblies 4 are distributed on the first side of the positioning accommodating cavity 31, and another part of the pressing assemblies 4 are distributed on the second side of the positioning accommodating cavity 31; of course, as another optional solution, in other embodiments, the two or more pressing assemblies 4 can also be distributed on the same side of the positioning accommodating cavity 31 along the width direction of the positioning accommodating cavity 31.

[0047] In addition, according to the structure of the measured workpiece, the relief groove 431 can be arranged on part of the pressing block 43 or all of the pressing block 43; the relief groove 431 penetrates the pressing block 43 in the height direction, or the relief groove 431 is recessed from the bottom of the pressing block 43 to the top of the pressing block 43 in the height direction. The relief groove 431 is formed on the pressing block 43, so that when the pressing block 43 is pressed against the measured workpiece, the relief groove 431 can avoid the individual protruding parts on the measured workpiece, so that the pressing block 43 can better press against the measured workpiece, to ensure the pressing and fixing effect of the measured workpiece.

[0048] As can be seen from the above, through the design of the CMM measurement auxiliary tool 100, the measured workpiece can be disassembled by hand operation without the aid of external tools, and under the assistance of the positioning accommodating cavity 31 of the fixing seat 3 and the internally formed supporting pad 311, the fixing seat 3 can accurately position the measured workpiece in the measured posture, so that additional supporting pads are not needed for supporting and adjusting the posture of the measured workpiece, which is beneficial to quickly disassemble and assemble the measured workpiece, makes the disassembly and assembly operation more simple and convenient, and ensures the clamping and fixing effect of the measured workpiece.

[0049] Measurement system embodiment

[0050] The measurement system comprises a measurement device (such as a three-coordinate measuring machine (CMM)) and the CMM measurement auxiliary tool described above, and the CMM measurement auxiliary tool is installed on the workbench of the measurement device. The measurement system is provided with the CMM measurement auxiliary tool, so that the disassembly and assembly of the measured workpiece are more convenient, easy to operate and time-saving when the measured workpiece is measured, which is beneficial to greatly improve the measurement efficiency and reduce the production cost and time cost.

[0051] Preferably, the measurement system further comprises a guide rail groove plate, and a guide groove is arranged on the guide rail groove plate; the guide groove comprises a dovetail guide groove and / or an inverted T-shaped guide groove; the guide rail groove plate is detachably installed on the workbench, and the CMM measurement auxiliary tool is detachably installed on the guide rail groove plate. The guide rail groove plate makes it more convenient to install the CMM measurement auxiliary tool on the workbench, and is also beneficial to disassemble and assemble the CMM measurement auxiliary tool of the measurement device and other measured products.

[0052] Finally, it should be emphasized that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A CMM measurement auxiliary fixture, including a base, characterized in that, Also includes: An upright plate, which is mounted on the base; A fixing seat is installed on the top of the upright plate, and the fixing seat has a positioning cavity that is recessed from the top surface of the fixing seat to the bottom surface of the fixing seat; A clamping assembly includes a slide rod, an elastic element, and a pressure block. The slide rod extends along the height direction of the base and is slidably connected to the fixed seat in the height direction. The pressure block is mounted on the slide rod and located above the fixed seat. The elastic element forces the slide rod to move towards the base, so that a clamping position is formed between the pressure block and the positioning cavity.

2. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The positioning and receiving cavity is provided with a support pad; and / or The inner wall of the positioning and receiving cavity is formed with protrusions.

3. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The elastic element is a compression spring. A limiting part is provided on the slide rod, located below the fixed base. The compression spring is sleeved on the slide rod, and abuts against the limiting part and the fixed base. The elastic element is a tension spring, which is located above the fixed base. The first end of the tension spring is connected to the fixed base, and the second end of the tension spring is connected to the slide rod or the pressure block. The slide bar can rotate about its own axis relative to the fixed base.

4. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The top of the fixing seat is provided with a recessed groove at the pressure block, and the recessed groove is recessed from the top of the fixing seat to the bottom of the fixing seat. When the pressure block is in the pressed state, a portion of the pressure block is located inside the sinking groove and adjacent to the groove wall of the sinking groove, so that the sinking groove restricts the slide rod from driving the pressure block to rotate relative to the fixed seat around the axis of the slide rod.

5. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The pressure block is threadedly connected to the slide rod; or The pressure block is interference-fitted with the slide rod.

6. The CMM measurement auxiliary fixture according to claim 1, characterized in that: The number of clamping components is two or more, and the two or more sets of clamping components are distributed along the length direction of the positioning and receiving cavity; In the width direction of the positioning cavity, two or more sets of the clamping components are distributed on the same side of the positioning cavity, or A portion of the clamping components are distributed on the first side of the positioning and receiving cavity, and another portion of the clamping components are distributed on the second side of the positioning and receiving cavity.

7. The CMM measurement auxiliary fixture according to claim 6, characterized in that: Some or all of the pressure blocks are provided with clearance grooves, which penetrate the pressure plate in the height direction, or The clearance groove is recessed from the bottom to the top of the pressure block in the height direction.

8. The CMM measurement auxiliary tooling according to any one of claims 1 to 7, characterized in that: The base is provided with a connecting hole, which penetrates the base in the height direction, and / or The base is provided with a guide rail at its bottom; An operating part is formed at the end of the slide rod away from the fixed base, and the operating part is provided with an anti-slip structure.

9. A measurement system, including measuring equipment, characterized in that, It also includes the CMM measurement auxiliary fixture as described in any one of claims 1 to 8, wherein the CMM measurement auxiliary fixture is mounted on the worktable of the measuring equipment.

10. The measurement system according to claim 9, characterized in that: The measurement system also includes a guide rail groove plate with guide grooves on the guide rail groove plate; The guide rail slot is detachably mounted on the workbench, and the CMM measurement auxiliary fixture is detachably mounted on the guide rail slot.

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