CN220489903U - Workpiece tapping deviation detection device - Google Patents

Abstract

The utility model provides a workpiece tapping deviation detection device which is used for detecting porous position distribution and inner hole coaxiality of a workpiece and comprises a first positioning disc assembled with the workpiece to be detected and a second positioning disc arranged on one side of the first positioning disc. The first positioning disk is provided with a plurality of positioning pins corresponding to the holes to be tested, and the positioning pins are configured to be provided with a plurality of telescopic joints which are mutually nested in a sliding mode. The second positioning disc is provided with a push rod which is connected with at least one of a plurality of expansion joints of the positioning pin shaft in a sliding manner so as to push at least one of the expansion joints of the positioning pin shaft, and when the expansion joints of the positioning pin shaft are all at a preset pushing-out position, the distance between each two adjacent end faces of the positioning pin shaft corresponds to the length of each step hole of the hole to be tested. The detection device can simultaneously detect position distribution and inner hole coaxiality of the holes to be detected, and avoids complex operation caused by multiple disassembly of different detection tools, so that the detection process is simpler and more efficient.

Description

Workpiece tapping deviation detection device

Technical Field

The utility model relates to the field of positioning tools, in particular to a workpiece tapping deviation detection device.

Background

In the case of shaft-type parts, in particular engine shafts, it is often necessary to machine a plurality of holes of different diameters, which are distributed annularly or freely, on the end face thereof. However, the size, number and distribution of the holes are designed according to the stress requirement of the shaft, so that the machining result of the holes on the end surface of the shaft needs to be precisely controlled. Therefore, in order to avoid the deviation of the hole opening position from the preset position, an operator needs to detect the hole opening position of the shaft with multiple holes on the end surface after the hole on the end surface of the shaft is machined, so that machining errors are prevented from being found in time, a large number of shaft parts are machined according to wrong machining parameters, and a large number of defective products are generated.

In the past, a manual detection mode is usually adopted for detecting the porous position of the end face of the shaft element, but due to quite low detection efficiency, a plurality of novel detection methods and detection appliances are proposed by the technical staff at present. For example, a three-coordinate method is adopted to measure the porous position, however, the three-coordinate measuring instrument has a complex structure and a plurality of operation steps, so that the detection efficiency is low. And as disclosed in the publication No. CN202836418U, the position detection device comprises a detection body, wherein an axial center hole is formed in the detection body, a guide device coaxial with the detection body is arranged on the upper end surface of the detection body, a mounting hole is formed in the guide device, a positioning device is arranged in the mounting hole, one end of the positioning device penetrates through the center hole of the detection body after penetrating out of the mounting hole, a plurality of detection tool holes are further formed in the detection body and positioned around the center hole, the centers of the detection tool holes are positioned on the same circumference, and a detection mandrel is inserted into each detection tool hole. The utility model can rapidly detect whether the circular hole distribution on the same circumference is qualified or not, and has the advantages of simple operation and rapid measurement.

Although the prior art has a detection device for rapidly detecting the distribution position of the end face porous, the detection device is not suitable for an end face porous shaft member with a stepped inner hole. When the multiple holes formed in the end face of the shaft piece are provided with stepped inner holes, not only the distribution positions of the multiple holes in the end face are required to be detected, but also the coaxiality of the multiple sections of inner holes of each hole is required to be further detected. If the coaxiality of each section of the inner hole does not reach the standard, the shaft piece can not be assembled correctly, so that a gap or extrusion exists between a part assembled into the hole and the hole wall, and the part is deformed or scrapped.

Existing methods for detecting bore coaxiality typically employ a machine tool chuck to clamp the shaft for rotation and use other auxiliary instruments (e.g., dial indicators) to continuously observe the readings to determine bore coaxiality. However, the method needs to occupy lathe equipment to delay the production progress, and is more dependent on the experience judgment of quality inspectors, so that the method has the defects of low efficiency and high error rate. Although some tools for conveniently detecting the coaxiality of an inner hole exist in the prior art, for example, a stepped hole coaxiality detection device disclosed in publication No. CN201555553U mainly comprises a detection shaft, a dial indicator and a lever, wherein the dial indicator and the lever are arranged on the detection shaft, the upper end of the detection shaft is a handle, the lower end of the detection shaft is a stepped shaft comprising a small-diameter shaft, and the small-diameter shaft is positioned at the bottommost end of the detection shaft. When the coaxiality of the stepped hole is detected, the small-diameter shaft at the lower end of the detection device is required to be inserted into the small-diameter hole of the stepped hole, the lower part of the lever is pressed by a finger, so that the lower end of the lever can smoothly enter the large-diameter hole of the stepped hole, the finger is released, the lower end of the lever is contacted with the hole wall of the large-diameter hole under the action of the compression spring, and the reading of the dial indicator is recorded at the moment.

The handle of the detection device is held by fingers, the detection shaft is slowly rotated for one circle, and the coaxiality value of the large-diameter hole and the small-diameter hole in the stepped hole and the out-of-tolerance condition of the large-diameter hole and the small-diameter hole in the stepped hole in all directions can be calculated according to the maximum change value of the readings of the dial indicator.

It can be seen that although the prior art has a detection tool for detecting the porous distribution position of the end face of the shaft element and a detection tool for detecting the coaxiality of the stepped holes, the operation processes of the detection tool and the detection tool are independent. That is, when quality inspectors need to perform position distribution and inner hole coaxiality inspection on the end face porous shaft piece with the stepped inner hole, two different detection tools can only be used for sequentially detecting the porous distribution position and the inner hole coaxiality, namely the quality inspectors need to perform twice loading and unloading on the detection tools, and the complexity of detection operation is obviously increased. Based on this, a person skilled in the art is urgent to propose a multifunctional detection tool for realizing position distribution detection and coaxiality detection through one tool and one-time detection.

Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, since the applicant has studied a lot of documents and patents while making the present utility model, the text is not limited to details and contents of all but it is by no means the present utility model does not have these prior art features, but the present utility model has all the prior art features, and the applicant remains in the background art to which the right of the related prior art is added.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a workpiece tapping deviation detection device for detecting the distribution position of holes to be detected and the coaxiality of the holes to be detected on an end surface porous shaft piece with a stepped inner hole.

Preferably, the utility model provides a workpiece tapping deviation detection device, which is used for detecting distribution of holes to be detected and coaxiality of the holes to be detected on a workpiece, and comprises a first positioning disc assembled with the workpiece to be detected and a second positioning disc arranged on one side of the first positioning disc away from the workpiece to be detected.

Preferably, the first positioning disk is provided with a plurality of positioning pins corresponding to holes to be measured on the end face of the workpiece to be measured, namely, the number, the size and the distribution position of the positioning pins are the same as those of the holes to be measured on the end face of the workpiece to be measured.

Preferably, the positioning pin is configured to have a plurality of telescopic joints nested in a sliding manner with each other, and each telescopic joint included in the positioning pin comprises at least one section corresponding to each stage of stepped hole of the workpiece to be measured.

Preferably, the second positioning plate has a push rod slidably connected to at least one of the plurality of telescopic joints of the positioning pin to push at least one of the plurality of telescopic joints of the positioning pin. Further, the number and the distribution positions of the push rods arranged on the second positioning disk are the same as those of the positioning pins on the first positioning disk.

Preferably, when the last section of the positioning pin is pushed out of the first section of the head end by the push rod along the first direction, the positioning pin forms a plurality of end surfaces distributed along the axial direction. The nearest positioning disk in the plurality of end surfaces is a first end surface. When each expansion joint of the positioning pin shaft is pushed out along the first direction, the first joint is the joint closest to the first positioning disc in the expansion joints, the last joint is the joint farthest from the first positioning disc in the expansion joints, and the first direction refers to the direction from the first joint to the last joint along the axial direction of the expansion joints.

Preferably, when each expansion joint of the positioning pin shaft is at the preset pushing-out position, the distance between two adjacent end faces of the positioning pin shaft except the first end face corresponds to the length of other hole sections except the first step hole in the step-shaped inner hole of the workpiece to be detected. The length of the hole section is the length of the inner hole along the axial direction.

Preferably, the distance from the first end face to the end face of the first positioning plate facing the workpiece to be measured is configured as the hole segment length of the first stepped hole of the workpiece to be measured.

Preferably, a limiting mechanism for limiting the push-out distance of each telescopic joint along the first direction is arranged between any two adjacent telescopic joints. The limiting mechanism is configured to include a limiting step disposed on an inner wall of the telescopic joint and a limiting flange disposed on an end portion of the telescopic joint. The preset pushing position is the farthest position of each telescopic joint which can be pushed out along the first direction under the limiting action of the limiting mechanism.

If the stepped inner hole of the workpiece to be tested is provided with a first stepped hole which is coaxially arranged and is closest to the end face of the opening, a second stepped hole and a third stepped hole which are connected with the first stepped hole, correspondingly, the expansion joint of the positioning pin shaft at least comprises a first section, a second section and a third section which are corresponding to the first stepped hole, the second stepped hole and the third stepped hole of the workpiece to be tested, and when the third section of the positioning pin shaft is pushed out of the first section by the push rod, the first end face, the second end face and the third end face which are axially distributed are formed by the positioning pin shaft.

Further, when the third section and the second section of the positioning pin shaft are both positioned at respective preset pushing-out positions, the distance between the third end face and the second end face of the positioning pin shaft is the axial length of the third stepped hole of the workpiece to be detected; when the third section and the second section of the positioning pin shaft are positioned at the respective preset pushing-out positions, the distance between the second end face and the first end face of the positioning pin shaft is the axial length of the second stepped hole; the distance from the first end face to the end face of the first positioning disk facing the workpiece to be measured is configured to be the axial length of the first stepped hole of the workpiece to be measured.

Preferably, the first positioning disc further comprises a positioning block for being assembled to an assembly hole of the workpiece to be tested, and the axial length of the positioning block is at least greater than the length of the head section expansion joint in the axial direction of the positioning pin shaft.

Preferably, the first fixing plate is provided with a plurality of reset pin shafts which are arranged on the first fixing plate in a circumferential direction in an elastic telescopic mode, and the reset pin shafts are partially inserted into the reset pin shaft assembly holes of the first fixing plate through compression springs. Further, one end of the compression spring is connected to the reset pin shaft, and the other end of the compression spring is fixed in the reset pin shaft assembly hole. When the detection starts, a quality inspector operates the handheld part to enable the first fixed disc to be in contact with the end face of the workpiece to be detected in the axial direction of the handheld part, and the reset pin shaft is compressed and reset into the pin shaft assembly hole due to the action of external force. When the detection is finished, the quality inspection personnel stop applying external force to the handheld part, and the reset pin shaft enables the first fixed disc to be pushed away from the workpiece to be detected along the axial direction under the action of the reset force provided by the compression spring, so that the situation that the first fixed disc and the workpiece to be detected are subjected to external force deviating from the axial direction when being separated from contact due to the handheld error of the quality inspection personnel is avoided, and further, unnecessary collision is caused on each positioning pin shaft on the first fixed disc, and the detection result is finally influenced.

The beneficial effects of the utility model are as follows:

the utility model provides a workpiece to-be-measured hole deviation detection device which is used for detecting to-be-measured hole deviation and to-be-measured hole coaxiality deviation of the end face of a workpiece to be measured, and aims to timely find out whether to-be-measured hole position is accurate and whether to-be-measured hole coaxiality with a stepped inner hole is consistent or not, so that an operator can timely grasp the processing state of the workpiece, timely process and remedy the workpiece, and avoid the occurrence of a large number of defective products caused by continuously adopting wrong processing parameters as much as possible. Further, the detection device of the application is further provided with the multi-stage positioning pin shaft which can detect the coaxiality of the multi-stage stepped holes, so that the detection device of the application can be used for completing position detection and coaxiality detection on all holes to be detected of a workpiece under the condition of completing one-time detection operation, and the deviation condition of the holes to be detected of the workpiece is presented in an efficient, simple and visual mode.

Drawings

Fig. 1 is a schematic structural diagram of a workpiece opening deviation detecting device provided by the application;

fig. 2 is a schematic diagram of a positioning pin of a workpiece hole deviation detecting device provided by the application;

FIG. 3 is a schematic view of a limiting mechanism of a workpiece opening deviation detecting device provided by the application;

FIG. 4 is a schematic view of a workpiece to be measured according to the present application;

FIG. 5 is a schematic illustration of a stepped bore of a workpiece to be tested according to the present application.

List of reference numerals

100: a hand-held part; 200: a first positioning disk; 300: a second positioning disk; 400: a workpiece to be measured; 210: resetting the pin shaft; 211: resetting the pin shaft assembly hole; 212: a compression spring; 220: a positioning block; 230: positioning pin shafts; 240: a limiting mechanism; 231: a first section; 232: a second section; 233: a third section; 234: a first end face; 235: a second end face; 236: a third end face; 241: a limit flange; 242: a limit step; 310: a push rod; 410: a fitting hole; 420: a hole to be measured; 421: a first stepped hole; 422: a second stepped hole; 423: and a third stepped hole.

Detailed Description

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and are not meant to be the only embodiment.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.

The utility model provides a workpiece to-be-measured hole deviation detection device which is used for detecting to-be-measured hole deviation and to-be-measured hole coaxiality deviation of the end face of a workpiece to be measured, and aims to timely find out whether to-be-measured hole position is accurate and whether to-be-measured hole coaxiality with a stepped inner hole is consistent or not, so that an operator can timely grasp the processing state of the workpiece, timely process and remedy the workpiece, and avoid the occurrence of a large number of defective products caused by adhering to wrong processing parameters as much as possible. Further, the detection device of the application is further provided with the multi-stage detection pin shaft which can detect the coaxiality of the multi-stage stepped holes, so that the detection device of the application can be used for completing position detection and coaxiality detection on all holes to be detected of a workpiece under the condition of completing one-time detection operation, and the deviation condition of the holes to be detected of the workpiece is presented in an efficient, simple and visual mode.

According to a preferred embodiment, as shown in fig. 1, the workpiece hole deviation detecting device includes a hand-hold portion 100, a first positioning plate 200, and a second positioning plate 300. Preferably, the hand-held part 100 has a cylindrical structure, and the first fixing plate 200 is fixedly coupled to an end of the hand-held part 100 such that the first positioning plate 200 can maintain the same movement state as the hand-held part 100. The second positioning disc 300 is sleeved on the handheld portion 100, and can perform sliding displacement along the axial direction of the handheld portion 100, so that the distance between the second positioning disc 300 and the first positioning disc 200 can be changed. The extending direction of the end face of the second positioning plate 300 is the same as the extending direction of the end face of the first positioning plate 200, and the first positioning plate 200 is movably connected to the second positioning plate 300 through a push rod 310. Further, a plurality of positioning pins 230 are disposed on the first positioning plate 200, and the positioning pins 230 are disposed on the first positioning plate 200 in a manner allowing the push rod 310 to be inserted. When the second positioning plate 300 approaches the first positioning plate 200 along the axial direction of the hand-held portion 100, the push rod 310 fixedly connected to the second positioning plate 300 can be inserted into the positioning pin 230, so as to change at least a part of the positioning pin 230. For example, when the push rod 310 is inserted into the positioning pin 230, the multi-stage telescopic structure of the positioning pin 230 can be extended in the axial direction.

According to a preferred embodiment, the first fixing plate 200 is further provided with a plurality of reset pins 210 which are elastically and telescopically arranged in the circumferential direction of the first fixing plate 200, and the reset pins 210 are partially inserted into the reset pin assembly holes 211 of the first fixing plate 200 by compression springs 212. Further, the compression spring 212 has one end connected to the reset pin 210 and the other end fixed in the reset pin assembly hole 210. When the inspection starts, the quality inspector operates the hand-held portion 100 such that the first fixing plate 200 contacts the end face of the workpiece 400 to be inspected in the axial direction of the hand-held portion 100, and the reset pin 210 is compressed into the reset pin fitting hole 211 due to the external force. When the detection is finished, the quality inspector stops applying the external force to the hand-hold portion 100, and the reset pin 210 pushes the first fixing plate 200 away from the workpiece 400 to be detected along the axial direction thereof under the action of the reset force provided by the compression spring 212, so that the external force deviating from the axial direction is avoided when the first fixing plate 200 and the workpiece 400 to be detected are separated from contact due to the hand-hold error of the quality inspector, and then unnecessary collision is caused to each positioning pin 230 on the first fixing plate 200, and the detection result is finally affected.

According to a preferred embodiment, as shown in fig. 2, the positioning pin 230 is configured as a multi-stage telescopic structure including: a first section 231, a second section 232, a third section 233. The first and second sections 231, 232 are configured as hollow cylindrical structures of different sizes such that the first and second sections 231, 232 are capable of nesting within each other and of undergoing relative displacement in the axial direction thereof under the influence of an external force, preferably pushing by the push rod 310. Further, the third section 233 is configured as a solid cylindrical structure such that the third section 233 has a contact surface with the pushrod 310, thereby enabling the pushrod 310 to push the third section 233 for axial displacement. Preferably, a limiting mechanism 240 is disposed between the first section 231, the second section 232, and the third section 233 such that each section of telescoping post has a limited preset push-out position. Preferably, as shown in fig. 3, the limiting mechanism 240 is disposed on a limiting step 242 on the inner wall of the telescopic joint and a limiting flange 241 disposed on the end of the telescopic joint. When the push rod 310 is used to push the third section 233, the third section 233 can be displaced in the axial direction, and when the third section 233 reaches the preset push-out position, the limiting mechanism 240 between the third section 233 and the second section 232 can limit the relative displacement between the third section 233 and the second section 232, so that the movement states of the third section 233 and the second section 232 are kept consistent. In the case that the relative movement of the third section 233 and the second section 232 is limited by the limiting mechanism 240, the push rod 310 is pushed further, in which case the third section 233 can displace axially with the second section 232 and protrude from the first section 231 under the pushing action of the push rod 310. When the second section 232 reaches the preset pushing position, the limiting mechanism 240 between the second section 232 and the first section 231 can limit the relative displacement between the second section 232 and the first section 231, so that the movement states of the second section 232 and the first section 231 are kept consistent. When the second section 232 and the third section 233 can reach the preset pushing position in the hole to be measured of the workpiece 400 to be measured at the same time, the coaxiality of the hole to be measured on the surface meets the preset requirement.

According to a preferred embodiment, further, as shown in fig. 2 and 5, the positioning pin 230 is configured with a first end surface 234, a second end surface 235 and a third end surface 236, and the first end surface 234, the second end surface 235 and the third end surface 236 can be mutually matched with the hole 200 to be measured having a stepped structure on the workpiece 400 to be measured, that is, when the positioning pin 230 is inserted into the hole 200 to be measured for coaxiality detection, the first end surface 234 of the first section 231 can be stopped at a connection part meeting the first stepped hole 421 and the second stepped hole 422 of the hole 200 to be measured, the second end surface 235 of the second section 232 can be stopped at a connection part meeting the second stepped hole 422 and the third stepped hole 423, and the third end surface 236 of the third section 233 can be stopped at a distal-most end meeting the third stepped hole 423. Specifically, the axial length of the first section 231 at the preset pushing position is the same as the axial depth of the first stepped hole 421 and the radial diameters of the first section 231 and the first stepped hole 421 are the same, so that when the first section 231 is inserted into the hole 200 to be measured, and when the axial feeding amount of the first section 231 reaches the axial depth of the first stepped hole 421, the first end face 234 of the first section 231 coincides with the end face of the first stepped hole 421, so that the first section 231 and the first stepped hole 421 can be integrated, and further the first section 231 can be calibrated, and the second section 232 and the third section 233 can be calibrated in the axial direction as described above.

According to a preferred embodiment, as shown in fig. 1 and 4, the first positioning plate 200 is provided with a positioning block 220 at the center thereof, the workpiece 400 to be measured is provided with a fitting hole 410 at the center thereof, the positioning block 220 has a size matching with that of the fitting hole 410, i.e., the axial length of the positioning block 220 is the same as the axial depth of the fitting hole 410, and the axial length of the positioning block 220 is greater than the axial length of the first section 231 of each positioning pin 230. When the hand-held part 100 is inserted into the workpiece 400 to be measured with the first positioning plate 200, the positioning block 220 can be completely embedded into the assembly hole 410 before each positioning pin 230 on the first positioning plate 200. When the workpiece to-be-detected hole deviation detection device is used for detection, the positioning block 220 and the assembly hole 410 can play a role in guiding and jointing, so that the detection device can be correctly matched on the end face of the workpiece 400 to be detected, and coaxiality detection of the to-be-detected holes is further realized after the distribution position of each to-be-detected hole is confirmed to be correct.

According to a preferred embodiment, as shown in fig. 5, holes 420 with stepped inner holes distributed at different positions are formed on the end surface of the workpiece to be inspected. When the detection device is used for detecting the coaxiality of the hole to be detected, the second positioning disk 300 is pushed along the direction close to the first positioning disk 200, so that the push rod 310 on the second positioning disk 300 can push the third section 233, the third section 233 drives the second section 232 and the first section 231 to reach the preset pushing-out position, and the second positioning disk 300 is pushed reversely to be far away from the first positioning disk 200. Secondly, the positioning pin 230 in a preset push-out position state is aligned with the hole 420 to be detected by the cooperation of the positioning block 220 and the assembly hole 410. Further, the positioning pin 230 of the multi-stage telescopic structure is inserted into the hole 420 to be detected for coaxiality detection. Finally, the positioning pin 230 is pulled out, and the position and coaxiality errors of the hole 420 to be detected are determined through the position state of the multi-stage telescopic structure on the positioning pin 230. The detection device used in the application has the advantage that the deflection of all holes to be detected can be detected at one time. If the third section 233 is found to be located at the first end surface 234 when the first puck 200 is pulled out, it can be determined that there is a deviation in the position of the hole 420 to be measured, that is, the positioning pin 230 cannot be smoothly inserted into the hole 420 to be measured. When the third section 233 is found to be located in the second end surface 235 upon pulling out the first puck 200, it can be determined that there is a deviation in the coaxiality of the third stepped hole 423 of the hole to be measured 420, that is, that the axes of the third section 233 and the third stepped hole 423 do not overlap. In summary, the detection device of the present application can obtain the detection result by observing the positional relationship between the first section 231, the second section 232, and the third section 233 and each end surface, and the above operation mode is simple and results are easy to understand, and has good practical operability and practicality.

According to another preferred embodiment, the operation of the detection device of the present application may also be: when the detection device is used for detecting the distribution position of the holes 420 to be detected, a quality inspector holds the handheld portion 100 and pushes the first positioning disk 200 at the end of the handheld portion 100 to the surface of the workpiece 400 to be detected along the axial direction of the handheld portion 100. The positioning blocks 220 on the first positioning plate 200 are aligned and inserted into the assembly holes 410 of the workpiece 400 to be measured, and the handheld part 100 is rotated to enable the positioning blocks 220 to be clamped in the assembly holes 310, and at this time, the distribution positions of the positioning pins 230 on the first positioning plate 200 are opposite to the distribution positions of the holes 420 to be measured of the workpiece 400 to be measured. Further, the quality inspector further pushes the hand-held portion 100, such that the first section 231 of each positioning pin 230 is inserted into the hole 420 to be inspected. If at this time, the first section 231 of each positioning pin 230 can be accurately inserted into the hole 420 to be measured, which indicates that the distribution position of the hole 420 to be measured meets the preset requirement. Further, the quality inspector pushes the second positioning disk 300 to enable the push rod 310 to push the expansion joints of each stage of the positioning pin 230 to extend into the stepped inner holes of the holes 420 to be inspected. When the second puck 300 is sensed to be subject to external resistance, the quality inspector pulls back the second puck 300 and stops applying external force to the hand-held portion 100. Under the action of the reset pin 210, the positioning pin 230 is ejected out of the hole 420 to be detected along the axial direction, the quality inspection personnel gently takes down the first positioning plate 200, and judges the coaxiality of the inner hole corresponding to the hole 420 to be detected through the telescopic state of each telescopic joint on each positioning pin 230 on the first positioning plate 200, and the specific judging method is the same as that described above.

It should be noted that, the overall dimension and the expansion series of the workpiece to-be-detected hole deviation detection device are designed according to the requirements of the detection part required by the embodiment, and if the model dimension of the to-be-detected part is changed, the detection device can adaptively change according to the dimension requirement of the to-be-detected workpiece, namely, the relevant dimension parameters and the expansion series of the detection tool are changed.

It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the utility model is defined by the claims and their equivalents.

Claims (10)

1. A workpiece tapping deviation detection device for detecting porous position distribution and inner hole coaxiality of a workpiece, which comprises a first positioning disk (200) assembled with the workpiece (400) to be detected, and is characterized in that,

the first positioning disk (200) is provided with a plurality of positioning pins (230) corresponding to holes (420) to be detected on the end face of the workpiece (400) to be detected, wherein,

the locating pin (230) is configured with several telescopic joints nested in a sliding manner with each other,

the second positioning disc (300) arranged on one side, far away from the workpiece (400) to be detected, of the first positioning disc (200) is connected with the first positioning disc (200) in a sliding mode through a push rod (310).

2. The device according to claim 1, wherein the second positioning plate (300) has a push rod (310) slidably connected to at least one of the plurality of telescopic joints of the positioning pin (230) to push the at least one of the plurality of telescopic joints of the positioning pin (230).

3. The apparatus according to claim 2, wherein each telescopic joint comprised by the positioning pin (230) comprises at least one section corresponding to each stage of stepped internal bore of the workpiece (400) to be measured.

4. A detection device according to claim 3, wherein the positioning pin (230) forms a plurality of end surfaces distributed in the axial direction when the last section of the telescopic joint of the positioning pin (230) is pushed out of the first section (231) by the push rod (310) in the first direction.

5. A test device according to claim 3, wherein between any two adjacent telescopic joints there is a limiting mechanism (240) for limiting the push-out distance in the first direction of adjacent telescopic joints.

6. The detection device of claim 5, wherein the limiting mechanism (240) is configured to include a limiting step (242) disposed on an inner wall of the telescopic joint and a limiting flange (241) disposed on an end of the telescopic joint.

7. The inspection apparatus according to claim 4, wherein when each expansion joint of the positioning pin (230) is at a preset pushing-out position, a distance between adjacent two end faces of the positioning pin (230) except for the first end face (234) corresponds to a length of other hole segments except for the first stepped hole (421) in the stepped inner hole of the workpiece (400) to be inspected.

8. The detection apparatus according to claim 7, characterized in that a distance from the first end face (234) to an end face of the first positioning plate (200) facing the workpiece (400) to be detected is configured as a hole segment length of a first stepped hole (421) of the workpiece (400) to be detected.

9. The apparatus according to claim 1, wherein the first positioning plate (200) further comprises a positioning block (220) for being assembled to an assembly hole (410) of the workpiece (400) to be measured.

10. The device according to claim 9, characterized in that the axial length of the positioning block (220) is greater than the length of the head expansion joint of the positioning pin (230) in the axial direction.