A tool gauge for measuring the symmetry of a straight slot of a plunger

Abstract

The utility model relates to a kind of plunger measurement straight slot degree of symmetry's frock gauge, including clamping body, positioning assembly, compression mechanism and measuring mechanism, through the special gauge of positioning assembly, compression mechanism and measuring mechanism integration, fast detection is realized, so that operator can real-time, fast symmetry determination to each plunger after grinding, to greatly shorten the detection waiting time, significantly improve production efficiency;At the same time, it can help operator quickly find and adjust the processing deviation caused by equipment program or clamp loosening, intercept unqualified product into next process, prevent batch quality accident from happening, ensure the consistency and stability of product processing quality, further reduce the dependence on professional measurement personnel and expensive equipment, overall improve the quality control ability and economic benefit of production line.

Description

Technical Field

[0001] This utility model relates to the field of plunger measurement technology, and in particular to a tooling fixture for measuring the symmetry of a straight groove in a plunger. Background Technology

[0002] In the existing technology, the detection of the symmetry of the straight groove of the plunger after grinding must be completed by a universal tool microscope in the metrology room. This detection method is cumbersome, time-consuming and cannot be carried out on the production site. As a result, operators cannot quickly and timely determine the symmetry of the straight groove during the processing, which not only seriously affects production efficiency, but also cannot effectively prevent batch processing quality problems caused by equipment or fixture abnormalities.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model discloses a tooling fixture for measuring the symmetry of straight grooves using a plunger. This solves the problem that operators cannot quickly and timely determine the symmetry of straight grooves during processing, which seriously affects production efficiency and fails to effectively prevent batch processing quality problems caused by equipment or fixture malfunctions.

[0005] The technical solution adopted in this utility model is as follows: A tooling fixture for measuring the symmetry of a straight groove using a plunger, characterized in that it comprises: Clamping body; A positioning component is disposed on the clamping body. The positioning component includes a positioning block configured to support the working outer circle of the plunger, a baffle configured to limit the end face of the plunger, and a flat positioning device configured to press against the flat part of the plunger. A clamping mechanism is provided on the clamping body, and the clamping mechanism is configured to clamp and fix the plunger to the positioning block; A measuring mechanism is disposed on the clamping body and located on the other side of the positioning block. The measuring mechanism includes a slide bar that can move linearly in the horizontal direction and a meter configured to detect the displacement of the slide bar. One end of the slide rod is equipped with a measuring head, and the other end is in contact with the measuring head of the meter. After the plunger is positioned and pressed, its straight groove is vertically upward, and the measuring head can enter or exit the straight groove under the drive of the slide rod.

[0006] A further technical solution is that the upper surface of the positioning block has two symmetrically connected inclined support surfaces, and the two support surfaces form a recessed support groove, in which the working outer circle of the plunger is supported.

[0007] A further technical solution is that the flat positioning device includes: A positioning seat is fixed to the clamp body, and the positioning seat has a first guide hole, in which a bushing is provided; A positioning slide post is slidably inserted into the bushing, with its axis parallel to the axis of the positioning block; one end of the positioning slide post is configured to contact the flat surface of the plunger.

[0008] A further technical solution is that the axis of the positioning slide is parallel to the axis of the support groove of the positioning block, and the position of the positioning slide is adjustablely mounted on the positioning seat.

[0009] A further technical solution is that the measuring mechanism further includes a measuring seat fixed on the positioning base, the measuring seat having a second guide hole, and the slide rod slidably passing through the second guide hole.

[0010] A further technical solution is that a guide sleeve is provided between the slide rod and the second guide hole.

[0011] A further technical solution is that the clamping mechanism includes: The lower end of the pressure rod screw is vertically fixed to the clamp body; The pressure plate has a through hole in the middle. The pressure plate is sleeved on the outside of the pressure rod screw through the through hole. The pressure plate can move up and down along the axial direction of the pressure rod screw. A spring is sleeved on the outside of the pressure rod screw and is pre-tightened under pressure between the lower surface of the pressure plate and the upper surface of the clamping body; A wing nut mates with the threaded section at the top of the pressure rod screw.

[0012] A further technical solution is that the measuring mechanism further includes: A base is fixed to the clamp body, and the base is configured to mount the meter.

[0013] A further technical solution is that the measuring instrument is a dial gauge.

[0014] A further technical solution is that an adjustable support pin is provided on the clamping body, the lower end of the adjustable support pin is fixed on the clamping body, and the upper end of the adjustable support pin abuts against the lower end of the pressure plate on the side away from the plunger.

[0015] The beneficial effects of this utility model embodiment are as follows: (i) A tooling fixture for measuring the symmetry of a straight groove in a plunger includes a clamping body, a positioning component, a clamping mechanism, and a measuring mechanism. Through a dedicated fixture integrating the positioning component, clamping mechanism, and measuring mechanism, rapid inspection is achieved, enabling operators to perform real-time and rapid symmetry determination on each plunger after grinding, thereby greatly shortening the inspection waiting time and significantly improving production efficiency. At the same time, it can help operators quickly identify and adjust processing deviations caused by equipment programs or loose clamps, intercepting defective products from flowing into the next process, preventing batch quality accidents, ensuring the consistency and stability of product processing quality, and reducing reliance on professional metrology personnel and expensive equipment, thus improving the overall quality control capability and economic benefits of the production line.

[0016] (ii) Furthermore, the flat positioning device includes a positioning seat and a positioning slide. The bushing ensures the accuracy and wear resistance of the positioning slide within the guide hole of the positioning seat, ensuring that its axis is always parallel to the axis of the positioning block. This guides the end of the positioning slide to accurately and stably adhere to the flat plane of the plunger, thereby strictly constraining the circumferential angular position of the plunger. Its adjustable position design allows the gauge to adapt to the flat dimensions of plungers of different specifications, ultimately ensuring that the straight groove of all plungers to be tested can be accurately positioned in a uniform vertical upward testing posture, providing a fundamental guarantee for the subsequent accurate measurement of symmetry.

[0017] (III) Furthermore, the clamping mechanism includes a pressure rod screw, a pressure plate, a spring, and a wing nut. The clamping mechanism provides vertical guidance through the pressure rod screw, and the pressure plate can rotate around it and move up and down to achieve rapid positioning. The spring is pre-tightened under pressure between the pressure plate and the clamping body, which not only provides the pressure plate with an automatic lifting and restoring force, but also generates a stable and flexible clamping force through elastic deformation when tightening the wing nut, effectively preventing damage to the surface of the precision plunger. The specially designed adjustable support pin supports the pressure plate from the far end below, forming a stable three-point support structure, which can effectively resist the deformation of the pressure plate that may occur during clamping, ensuring that the clamping force is evenly distributed, thereby firmly and undamagedly fixing the plunger in the correct position throughout the entire testing process.

[0018] (iv) Further, the measuring mechanism also includes a measuring seat fixed to the positioning base, the measuring seat having a second guide hole, through which the slide rod slidably passes. For example, a guide sleeve is provided between the slide rod and the second guide hole. For example, the measuring mechanism also includes a dial indicator base. The dial indicator base is fixed to the fixture. The dial indicator base is configured to mount a measuring instrument. For example, the measuring instrument is a dial indicator. The measuring mechanism provides a stable mounting base for the slide rod through the measuring seat fixed to the fixture. Its second guide hole and guide sleeve together form a high-precision linear guide pair, ensuring that the slide rod always slides smoothly along the horizontal axis without radial wobble during the measurement process, thereby accurately converting the positional change of the measuring head in the plunger groove into axial displacement. The dial indicator base fixed to the fixture provides a stable mounting reference for the dial indicator, ensuring reliable contact between its probe and the end of the slide rod. Finally, the linear displacement transmitted by the slide rod is sensitively indicated by the deflection of the dial indicator pointer, achieving high-precision, digitally rapid reading of the groove symmetry deviation. Attached Figure Description

[0019] Figure 1 This is a top view of the tooling fixture for measuring the symmetry of a straight groove using a plunger, according to this utility model.

[0020] Figure 2 This is a front view schematic diagram of a tooling fixture for measuring the symmetry of a straight groove using a plunger, according to this utility model.

[0021] Figure 3 This is a side view of the tooling structure of a plunger for measuring the symmetry of a straight groove according to the present invention.

[0022] In the picture: 100. Clamp body; 200. Positioning component; 210. Positioning block; 211. Support surface; 212. Support groove; 220. Baffle; 230. Flat positioning device; 231. Positioning seat; 232. Positioning slide; 233. Bushing; 300. Clamping mechanism; 310. Pressure rod screw; 320. Pressure plate; 330. Spring; 340. Wing nut; 400. Measuring mechanism; 410. Slide rod; 411. Measuring head; 420. Measuring gauge; 430. Measuring seat; 431. Guide sleeve; 440. Gauge base; 500. Plunger; 600. Adjustable support pin. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] First embodiment: A tooling fixture for measuring the symmetry of a straight groove using a plunger includes a clamping body 100, a positioning component 200, a clamping mechanism 300, and a measuring mechanism 400.

[0025] The positioning component 200 is disposed on the clamping body 100. The positioning component 200 includes a positioning block 210 configured to support the working outer circle of the plunger 500, a baffle 220 configured to limit the end face of the plunger 500, and a flat positioning device 230 configured to press against the flat part of the plunger 500. For example, the upper surface of the positioning block 210 has two symmetrically connected inclined support surfaces 211, which form a recessed support groove 212. The working outer circle of the plunger 500 is supported in the support groove 212. The baffle 220 is disposed at the end of the positioning block 210, and a portion of the baffle 220 extends beyond the support groove 212 to limit the end face of the plunger 500.

[0026] The clamping mechanism 300 is disposed on the clamping body 100 and is configured to clamp and fix the plunger 500 onto the positioning block 210.

[0027] The measuring mechanism 400 is mounted on the clamp body 100 and located on the other side of the positioning block 210. The measuring mechanism 400 includes a slide bar 410 that can move linearly in the horizontal direction and a meter 420 configured to detect the displacement of the slide bar 410.

[0028] One end of the slide rod 410 is equipped with a measuring head 411, and the other end of the slide rod 410 is in contact with the measuring head of the meter 420. After the plunger 500 is positioned and pressed, its straight groove opening is vertically upward, and the measuring head 411 can enter or exit the straight groove under the drive of the slide rod 410.

[0029] Furthermore, the flat positioning device 230 includes a positioning seat 231 and a positioning slide 232. The positioning seat 231 is fixed to the clamping body 100, and the positioning seat 231 has a first guide hole, in which a bushing 233 is provided. The positioning slide 232 is slidably inserted into the bushing 233, and its axis is parallel to the axis of the positioning block 210. One end of the positioning slide 232 is configured to contact the flat plane of the plunger 500. For example, the axis of the positioning slide 232 is parallel to the axis of the support groove 212 of the positioning block 210, and the position of the positioning slide 232 is adjustablely mounted on the positioning seat 231. The bushing 233 ensures the accuracy and wear resistance of the positioning slide 232 within the guide hole of the positioning seat 231, ensuring that its axis is always parallel to the axis of the positioning block 210. This guides the end of the positioning slide 232 to accurately and stably adhere to the flat plane of the plunger 500, thereby strictly constraining the circumferential angular position of the plunger 500. Its adjustable position design allows the gauge to adapt to the flat dimensions of plungers 500 of different specifications, ultimately ensuring that the straight grooves of all plungers 500 to be tested can be accurately positioned in a uniform vertical upward testing posture, providing a fundamental guarantee for the subsequent accurate measurement of symmetry.

[0030] Furthermore, the clamping mechanism 300 includes a pressure rod screw 310, a pressure plate 320, a spring 330, and a wing nut 340. The lower end of the pressure rod screw 310 is vertically fixed to the clamping body 100. The pressure plate 320 has a through hole in its middle, and the pressure plate 320 is sleeved on the outside of the pressure rod screw 310 through the through hole, and the pressure plate 320 moves up and down along the axial direction of the pressure rod screw 310. The spring 330 is sleeved on the outside of the pressure rod screw 310 and is pre-tightened under pressure between the lower surface of the pressure plate 320 and the upper surface of the clamping body 100. The wing nut 340 engages with the threaded section at the upper part of the pressure rod screw 310. For example, an adjustable support pin is provided on the upper part of the clamping body 100, the lower end of the adjustable support pin is fixed to the clamping body 100, and the upper end of the adjustable support pin abuts against the lower end of the pressure plate 320 on the side away from the plunger 500. The clamping mechanism 300 provides vertical guidance through the pressure rod screw 310, and the pressure plate 320 can rotate and move up and down around it to achieve rapid positioning. The spring 330 is pre-tightened under pressure between the pressure plate 320 and the clamping body 100, which not only provides the pressure plate 320 with an automatic lifting and restoring force, but also generates a stable and flexible clamping force through elastic deformation when tightening the wing nut 340, effectively preventing damage to the surface of the precision plunger 500. The specially designed adjustable support pin supports the far end of the pressure plate 320 from below, forming a stable three-point support structure, which can effectively resist the deformation of the pressure plate 320 that may occur during clamping, ensuring that the clamping force is evenly distributed, thereby firmly and undamagedly fixing the plunger 500 in the correct position throughout the entire testing process.

[0031] Furthermore, the measuring mechanism 400 also includes a measuring seat 430 fixed to the positioning base, the measuring seat 430 having a second guide hole, and a slide rod 410 slidably passing through the second guide hole. Exemplarily, a guide sleeve 431 is provided between the slide rod 410 and the second guide hole. Exemplarily, the measuring mechanism 400 also includes a dial indicator 440. The dial indicator 440 is fixed to the clamping body 100. The dial indicator 440 is configured to mount a dial gauge 420. Exemplarily, the dial gauge 420 is a dial indicator. The measuring mechanism 400 provides a stable mounting base for the slide rod 410 through the measuring seat 430 fixed on the fixture 100. Its second guide hole and guide sleeve 431 together form a high-precision linear guide pair, ensuring that the slide rod 410 always slides smoothly along the horizontal axis without radial wobble during the measurement process, thereby accurately converting the position change of the measuring head 411 in the straight groove of the plunger 500 into axial displacement. The dial indicator seat 440 fixed on the fixture 100 provides a stable mounting reference for the dial indicator, ensuring reliable contact between its probe and the end of the slide rod 410. Finally, the linear displacement transmitted by the slide rod 410 is sensitively indicated by the deflection of the dial indicator pointer, realizing high-precision, digital, and rapid reading of the straight groove symmetry deviation.

[0032] In operation, this embodiment is as follows: The operator first places the plunger 500, with its oil-pressing end face against the baffle 220 and its working outer circle into the support groove 212 of the positioning block 210, ensuring the flat surface of the plunger 500 is in close contact with the end of the positioning slide 232, thus completing the initial positioning of the part. Then, the pressure plate 320 is pressed down to cover the outer circle of the plunger 500, and the wing nut 340 is tightened. A stable clamping force is generated by the compression spring 330, firmly fixing the plunger 500 to the testing station. At this time, the straight groove opening of the plunger 500 remains vertically upward. Next... Push the slide bar 410 so that the measuring head 411 at one end enters horizontally into the straight groove of the plunger 500, and the other end of the slide bar 410 transmits the displacement to the dial indicator. Before the formal test, the above operation must be repeated with a sample column that meets the symmetry requirements, and the dial indicator reading should be zeroed. Then, replace it with the part to be tested and perform the same operation. By observing the offset of the dial indicator pointer relative to the zero position, it is possible to quickly determine whether the straight groove symmetry of the part is qualified. If the reading is out of tolerance, the program or fixture of the grinding equipment should be adjusted immediately, and the processing and measurement should be carried out again until the symmetry is qualified.

[0033] In this embodiment, rapid inspection is achieved, enabling operators to quickly and in real-time determine the symmetry of each plunger after grinding, thereby greatly shortening the inspection waiting time and significantly improving production efficiency. At the same time, it helps operators quickly identify and adjust processing deviations caused by equipment programs or loose fixtures, preventing defective products from flowing into the next process, eliminating batch quality accidents, ensuring the consistency and stability of product processing quality, and reducing reliance on professional metrology personnel and expensive equipment, thus improving the overall quality control capability and economic benefits of the production line.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tooling fixture for measuring the symmetry of a straight groove using a plunger, characterized in that, include: Clamping body; A positioning component is disposed on the clamping body. The positioning component includes a positioning block configured to support the working outer circle of the plunger, a baffle configured to limit the end face of the plunger, and a flat positioning device configured to press against the flat part of the plunger. A clamping mechanism is provided on the clamping body, and the clamping mechanism is configured to clamp and fix the plunger to the positioning block; A measuring mechanism is provided on the clamping body and located on the other side of the positioning block. The measuring mechanism includes a slide bar that can move linearly in the horizontal direction and a meter configured to detect the displacement of the slide bar. One end of the slide rod is equipped with a measuring head, and the other end is in contact with the measuring head of the meter. After the plunger is positioned and pressed, its straight groove is vertically upward, and the measuring head can enter or exit the straight groove under the drive of the slide rod.

2. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 1, characterized in that: The upper surface of the positioning block has two symmetrically connected inclined support surfaces, which form a recessed support groove, and the working outer circle of the plunger is supported in the support groove.

3. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 2, characterized in that: The flat positioning device includes: A positioning seat is fixed to the clamp body, and the positioning seat has a first guide hole, in which a bushing is provided; A positioning slide post is slidably inserted into the bushing, with its axis parallel to the axis of the positioning block; one end of the positioning slide post is configured to contact the flat surface of the plunger.

4. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 3, characterized in that: The axis of the positioning slide is parallel to the axis of the support groove of the positioning block, and the position of the positioning slide is adjustablely mounted on the positioning seat.

5. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 1, characterized in that: The measuring mechanism also includes a measuring seat fixed on the positioning base, the measuring seat having a second guide hole, and the slide rod slidably passing through the second guide hole.

6. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 5, characterized in that: A guide sleeve is provided between the slide rod and the second guide hole.

7. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 1, characterized in that: The clamping mechanism includes: The lower end of the pressure rod screw is vertically fixed to the clamp body; The pressure plate has a through hole in the middle. The pressure plate is sleeved on the outside of the pressure rod screw through the through hole. The pressure plate can move up and down along the axial direction of the pressure rod screw. A spring is sleeved on the outside of the pressure rod screw and is pre-tightened under pressure between the lower surface of the pressure plate and the upper surface of the clamping body; A wing nut mates with the threaded section at the top of the pressure rod screw.

8. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 1, characterized in that: The measuring mechanism also includes: A base is fixed to the clamp body, and the base is configured to mount the meter.

9. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 1, characterized in that: The measuring instrument is a dial gauge.

10. The tooling fixture for measuring the symmetry of a straight groove using a plunger according to claim 7, characterized in that: An adjustable support pin is provided on the clamping body. The lower end of the adjustable support pin is fixed to the clamping body, and the upper end of the adjustable support pin abuts against the lower end of the pressure plate on the side away from the plunger.

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