CN107167060B - Product cubing - Google Patents

Abstract

It includes: cubing pedestal that the present invention, which discloses a kind of product cubing,；Cubing ontology has border ontology and midfoot support ontology；Centralising device, for adjusting the detection position of product to be detected；Positioning device, for fixing product to be detected, positioning device has pedestal, jaw part, clamping bar, the block that is located by connecting, rotational positioning block and positioning plate；Wherein, pedestal and positioning plate are respectively fixedly disposed on cubing pedestal, and jaw part one end is set on the base, the other end is connect with clamping bar, the block that is located by connecting is arranged on clamping bar, and the block that is located by connecting has connecting groove, and two walls of rotational positioning block and connecting groove are pivotally connected.Midfoot support ontology can guarantee that collapsing for centre will not occur for product, and centralising device facilitates the position of adjustment product, and the accuracy which adjusts product position is high.Product after positioning device harmonizes position is clamped positioning, the cooperation of rotational positioning block and positioning plate, to product accurate positioning.

Description

Workpiece checking fixture

Technical Field

The invention relates to a checking fixture, in particular to a workpiece checking fixture suitable for an automobile hood outer plate.

Background

In the welding manufacturing process of the automobile body, the precision of the body-in-white is a main index of the welding process level, and the high-precision body-in-white can improve the assembly of the total parts and can also improve the quality of the appearance gap of the automobile body. At present, in the whole vehicle development process, most of automobile stamping part single pieces and welding assemblies adopt a checking fixture for detection and acceptance, whether the precision of stamping part holes, the profile degree of surfaces and the like are qualified or not is confirmed, and the loading requirement is met.

The design structure of the stamping detection tool directly influences the operation convenience and the work efficiency of detection, and the effectiveness and the accuracy of a part precision detection result can be directly influenced if the part is positioned and placed in place.

The invention mainly provides a clamping, positioning and detecting device for a detecting tool, which is used in a stamping detecting tool, ensures that a product is stably positioned in the detecting tool, can realize precision detection, provides real and effective data for plate precision detection, and promotes the precision improvement of a vehicle body.

The automobile hood outer plate inspection device in the prior art is designed to be placed in a protruding mode, and adopts the protruding mode to detect the accuracy, and the main structure of the inspection device comprises: part A, a gauge base 01, a gauge body 02, a positioning block 03 and a clamp 04. Wherein, examine a base 01 and examine a mounting body. The checking fixture body 02 is fixedly mounted on the checking fixture base 01 through screws and is a support body for placing a workpiece processed according to the profile of the workpiece. The positioning blocks 03 are fixedly arranged on the checking fixture body on the periphery of the edge of the part, are designed to be arranged on two adjacent edges of the outer plate of the hair cover, are arranged on each side, are in plane contact with the edge of the outer plate of the hair cover as positioning references and are used for positioning the part in the plane direction when the part is placed, and realize reference positioning in two directions of the hair cover. The clamp 04 is uniformly arranged and fixedly installed on the checking fixture base 01, the periphery of the hood outer plate is used for clamping a workpiece after the positioning of the workpiece is completed, and the workpiece is prevented from moving in position during precision detection to influence a detection result.

The using method comprises the following steps: when the fixture is used, the workpiece is placed on the fixture body, and then the position of the hair cover is manually moved and adjusted, so that the edge planes of the workpiece provided with the two sides of the positioning block 03 are respectively attached to the positioning block 03, and the positioning of the base is completed. After positioning is completed, the circumference of the workpiece is clamped by using a clamp 04, and then detection is performed.

The prior art scheme has the following problems:

(1) the size of parts of the vehicle type hood outer plate is large, the rigidity of the middle area of a workpiece is usually relatively poor, and the convex detection structure has the condition that the molded surface of the middle area collapses and sinks, so that the precision detection of the molded surface is influenced.

(2) The hair cover outer plate is an outer plate, no hole is formed in the part, hole positioning cannot be used, and only edge positioning can be used. When the positioning is placed, the edge profiles of the two adjacent sides of the outer plate workpiece of the hood are attached to the reference positioning block 03 by manual movement adjustment, one person is very inconvenient to operate when the position of the part is adjusted, two persons are needed to operate, and the work efficiency is lower during adjustment.

(3) The hair cover outer plate is positioned by abutting the edge-covering surface with the bent edge against the positioning block 03, and when the precision of the edge-covering surface of a workpiece is unqualified (excessive bending or insufficient springback bending exists), the positioning of the workpiece can be positioned and detected by taking the unqualified positioning surface as a reference, so that the detection result has no validity.

Disclosure of Invention

The invention aims to provide a workpiece checking fixture which can prevent a workpiece from being too large in size and collapsing in the middle, and is easy to adjust when the workpiece is placed and positioned, so that the detection efficiency is improved. And meanwhile, the positioning of the workpiece is more accurate.

The part checking fixture comprises: a gauge base; the gauge body is fixedly arranged on the gauge base and is provided with a peripheral body and a middle supporting body, the peripheral body is provided with an outer ring corresponding to the appearance of a standard workpiece, and the middle supporting body is positioned in the peripheral body; the centering device is used for adjusting the detection position of the workpiece to be detected; the positioning device is used for fixing a workpiece to be detected and is provided with a base, a clamping part, a clamping rod, a positioning connecting block, a rotary positioning block and a positioning plate; the base and the positioning plate are respectively fixedly arranged on the checking fixture base, one end of a clamp part is arranged on the base, the other end of the clamp part is connected with the clamping rod, a positioning connecting block is arranged on the clamping rod, the positioning connecting block is provided with a connecting groove, and the rotary positioning block is pivotally connected with two walls of the connecting groove through a rotating shaft; the rotary positioning block is provided with at least one positioning surface, and the positioning surface is matched with the positioning plate to clamp the workpiece to be detected.

The workpiece checking fixture comprises a positioning surface, a first positioning surface and a second positioning surface, wherein the positioning surface comprises two positioning surfaces which form an acute included angle and are respectively a first positioning surface and a second positioning surface; and/or the positioning plate comprises a character-shaped part and a mounting part, the mounting part is fixedly connected with the checking fixture base, the mounting part faces the rotary positioning block, and a reference cushion block is arranged on the surface facing the rotary positioning block.

The workpiece checking fixture comprises a positioning connecting block, a clamping rod and a check nut, wherein the positioning connecting block is provided with a threaded hole, the clamping rod is provided with an external thread, the positioning connecting block is in threaded connection with the clamping rod, and the clamping rod is further provided with the check nut.

The workpiece testing fixture comprises a centering device, a pull rod connecting part and a rotating connecting part, wherein the centering device is provided with a centering part, a pull rod connecting part and a rotating connecting part; the rotary connecting part is provided with a rotary connecting block, the rotary connecting block is in running fit with the rotary base through a rotary rod, and two ends of the rotary connecting block are respectively used for connecting the pull rod connecting parts; the pull rod connecting parts are provided with two groups and are respectively positioned at two sides of the rotary connecting part, one end of each pull rod connecting part, which is close to the rotary connecting part, is pivoted with the rotary connecting block, and one end of each pull rod connecting part, which is far away from the rotary connecting part, is respectively connected with one of the pair of middle parts; the mounting plate is provided with a sliding device in the middle, a mounting bracket is arranged on the mounting plate, and a workpiece positioning pin is arranged at the top of the mounting bracket.

The workpiece checking fixture comprises a mounting plate, a positioning base and a positioning base, wherein the mounting plate is provided with a positioning hole; the positioning pin penetrates through a through hole formed in the mounting plate and is inserted into the positioning hole so as to position the mounting plate; the positioning portion further has: the operating block is positioned on the mounting plate and is fixedly connected with the top end of the positioning pin; the shaft sleeve is sleeved in the through hole, and the positioning pin is sleeved in the shaft sleeve in a sliding manner; the spring is positioned between the shaft sleeve and the positioning pin; and the positioning pin sleeve is sleeved in the positioning hole and is in inserted fit with the bottom end of the positioning pin.

The workpiece testing fixture comprises an operation block, a positioning pin and a positioning lug, wherein the operation block is provided with a positioning hole at the bottom for mounting the positioning pin; a groove is formed in the top of the shaft sleeve and is detachably matched with the lug boss in an inserting mode, arc grooves are formed in the tops of the side walls of the two sides of the groove, the depth of each arc groove is smaller than that of the groove, and the arc grooves are used for supporting the lug boss; and/or a hexagonal dismounting part is formed on the shaft sleeve.

The workpiece testing fixture comprises a groove, a shaft sleeve and a through hole, wherein the shaft sleeve is provided with a guide hole which penetrates through the shaft sleeve in the axial direction, the bottom surface of the groove is provided with a through hole which is communicated with the guide hole and is smaller than the guide hole in diameter, and a first step surface is formed at the junction of the guide hole and the through hole; the positioning pin comprises a rod part with a smaller diameter at the upper part and a pin part with a larger diameter at the lower part, and a second step surface is formed between the rod part and the pin part; the spring is clamped between the first step surface and the second step surface.

The workpiece testing fixture comprises a mounting bracket, a pin bush mounting hole and a rotation stopping hole, wherein the pin bush mounting hole is arranged in the axial direction of the mounting bracket; a pin bush is arranged in the pin bush mounting hole, the pin bush is provided with an internal thread hole which is in threaded connection with the workpiece positioning pin, and the outer wall of the pin bush is also provided with a rotation stopping plane; the screw or the pin is inserted into the rotation stopping hole and abuts against the rotation stopping plane to play a role in stopping rotation.

The workpiece testing fixture as described above, wherein said pair of middle portions further comprises: the lower guide block is fixedly arranged on the checking fixture base; the upper guide block is in sliding fit with the lower guide block, and the mounting plate is fixedly arranged on the upper guide block; and the connecting block is fixedly arranged on the upper guide block or the mounting plate and is connected with the pull rod connecting part.

The workpiece detection tool comprises a pull rod, pull rod connecting blocks and locking nuts, wherein the pull rod connecting parts comprise a rod part and threaded connecting parts located at two ends of the rod part, the threaded connecting parts are external threaded rods, each threaded connecting part is in threaded connection with one pull rod connecting block, and the locking nuts are arranged on the threaded connecting parts; the pull rod connecting block is provided with a connecting bottom hole and a rotating hole, the connecting bottom hole is in threaded connection with the threaded connecting part, and the rotating hole is pivoted with the rotating connecting block through a bolt or a pin shaft or is connected with the centering part.

The middle support body of the workpiece checking fixture can ensure that the workpiece cannot collapse in the middle, the centering device is convenient to adjust the position of the workpiece, and the centering device is high in accuracy of adjusting the position of the workpiece. Furthermore, the positioning device clamps and positions the workpiece after the position adjustment, and the positioning device is matched with the positioning plate in a rotating mode to accurately position the workpiece.

Drawings

FIG. 1 is a block diagram of a prior art fixture;

FIG. 2 is a partial block diagram of a prior art fixture;

FIG. 3 is a mounting structure view of a positioning block of a prior art checking fixture;

FIG. 4 is a view of an application structure (in use) of the part testing fixture of the present invention;

FIG. 5 is a diagram of a part inspection tool according to the present invention;

FIG. 6 is a diagram of a centering device of the workpiece fixture of the present invention;

FIG. 7 is a schematic view of a portion of a centering device of the part inspection tool of the present invention;

FIG. 8 is an exploded view of the projection 7;

FIG. 9 is a view of a middle portion of the workpiece fixture of the present invention;

FIG. 10 is a view of a top and bottom guide block of the workpiece fixture of the present invention;

FIG. 11 is a view of a positioning portion of the part testing fixture of the present invention;

FIG. 12 is an exploded view of FIG. 11;

FIG. 13 is a sectional view of the positioning portion of the part testing fixture of the present invention in the positioned position (locked);

FIG. 14 is a sectional view (not locked) of the positioning portion of the part testing tool of the present invention in the positioned position;

FIG. 15 is a schematic view of a shaft sleeve of a positioning portion of the part testing fixture according to the present invention;

FIG. 16 is a sectional structure view of a shaft sleeve of a positioning part in the workpiece testing fixture according to the present invention;

FIG. 17 is a diagram of a positioning part operating block in the workpiece testing fixture according to the present invention;

FIG. 18 is a drawing of a connecting portion of a pull rod of the workpiece fixture of the present invention;

FIG. 19 is an exploded view of FIG. 18;

FIG. 20 is a schematic view of a positioning apparatus for a part inspection tool according to the present invention;

fig. 21 is an exploded view of fig. 20.

Reference numerals:

Prior Art

01 examine a base 03 reference locating piece

02 examine a body 04 clamp

The application:

a to-be-detected workpiece 326 positioning pin sleeve

1 examine utensil base 327 gag lever post

2 examine a body 33 pull rod connecting portion

21 circle body 331 pull rod

22 middle support body 3311 rod part

Threaded connection of 23 reference shim 3312

3 centering device 332 pull rod connecting block

31 centering portion 3321 rotation hole

311 mounting plate 3322 connects bottom hole

312 mounting bracket 333 lock nut

3121 Pin bushing mounting hole 34 swivel connection

3122 rotation stop hole 341 rotary connection block

313 pin sleeve 342 rotating rod

3131 shoulder with an internally threaded hole 3421

3132 rotation preventing plane 3422 rotation preventing plane

314 part locating pin 343 spin base

315 upper guide block 3431 swivel hole

316 lower guide block 3432 anti-rotation bottom hole

317 connecting block 4 positioning device

32 positioning part 41 clamp part

321 operating block 42 clamping rod

3211 positioning and connecting block with lug 43

3212 locknut with bottom hole 44

322 positioning pin 45 rotary positioning block

3221 the rod portion 451 has a first positioning surface

3222 second locating surface of the pin 452

323 spring 46 shaft

324 axle sleeve 47 positioning plate

3241 groove 471 shaped part

3242 arc groove 472 mounting part

3243 hexagonal disassembling part 5 clamping pliers

3244 via hole

3245 guide hole

325 positioning base

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

The invention discloses a part checking fixture which is provided with a checking fixture base 1, a checking fixture body 2, a centering device 3 and a positioning device 4, wherein all parts are described below respectively.

For convenience of description, the object a to be detected is an outer panel of an automobile hood, and is hereinafter referred to as the object a.

The checking fixture comprises a checking fixture body 2 fixedly arranged on the checking fixture base 1, wherein the checking fixture body 2 is provided with a circumference body 21 and a middle supporting body 22, the circumference body 21 is provided with an outer ring corresponding to the appearance of a standard part, and the middle supporting body 22 is positioned in the circumference body 21.

Referring to fig. 4 and 5, when taking an outer panel of an automobile hood as an example, the front end structure of the standard component is arc-shaped, and correspondingly, the circumference body 21 is also arc-shaped, the support body 22 is disposed at the center of the arc-shaped structure, and preferably, a reference cushion block 23 is further disposed on the top of the support body 22, and the reference cushion block 23 is generally a rubber member and is used for supporting the component a to avoid scratches.

Referring to fig. 6, the centering device 3 is used for adjusting the detection position of the object a to be detected, and the centering device has a centering portion 31, a pull rod connecting portion 33, a rotation connecting portion 34 and a positioning portion 32, wherein the main structure is described as follows:

as shown in fig. 7 to 9, the centering portion 31 has a mounting plate 311 slidably disposed, the mounting plate 311 has a mounting bracket 312 and a through hole, and a workpiece positioning pin 314 is disposed on the top of the mounting bracket 312; preferably, the top of the mounting bracket 312 has an axial pin bush mounting hole 3121, and a rotation stop hole 3122 perpendicular to the pin bush mounting hole 3121; a pin sleeve 313 is arranged in the pin sleeve mounting hole 3121, the pin sleeve 313 is provided with an internal threaded hole 3131 to be in threaded connection with the positioning pin 314 of the workpiece, and the outer wall of the pin sleeve 313 is also provided with a rotation stop plane 3132; a screw or a pin is inserted into the rotation stopping hole 3122 to abut against the rotation stopping plane 3132, so as to perform the rotation stopping function. The sliding of the mounting plate 311 may be achieved by cylinder pushing.

More preferably, the centering portion 31 further includes: the lower guide block 316 is fixedly arranged on the gauge base 1; an upper guide block 315 in sliding fit with the lower guide block 316, wherein the mounting plate 311 is fixedly arranged on the upper guide block 315; and a connecting block 317 fixedly disposed on the upper guide block 315 or the mounting plate 311 and connected to the link connecting part 33. See above fig. 7 to 10.

Referring to fig. 7 and 8, and fig. 11 to 17, the positioning portion 32 has a positioning base 325 and a positioning pin 322, the positioning base 325 is located at the bottom of the mounting plate 311 and has a positioning hole, and the positioning pin 322 passes through the through hole to be inserted into the positioning hole to position the mounting plate 311.

Preferably, the positioning portion 32 further includes: the operation block 321 is positioned on the mounting plate 311 and fixedly connected with the top end of the positioning pin 322; a shaft sleeve 324 sleeved in the through hole, wherein the positioning pin 322 is slidably sleeved in the shaft sleeve 324; a spring 323 located between the bushing 324 and the detent pin 322; and the positioning pin sleeve 326 is sleeved in the positioning hole and is in inserted connection with the bottom end of the positioning pin 322.

A mounting bottom hole 3212 is formed at the bottom of the operating block 321 for mounting the positioning pin 322, and a protruding ear 3211 is formed at the periphery of the mounting bottom hole 3212;

the top of the sleeve 324 forms a groove 3241, which is detachably connected with the protruding ear 3211 in an inserting manner, where the inserting manner means that the ear 3211 and the groove 3241 can slide, and the two can be connected together or separated. Arc grooves 3242 are formed in the top of the side walls on the two sides of the groove 3241, the depth of the arc groove 3242 is smaller than that of the groove 3241, and the arc groove 3242 is used for supporting the protruding lug portion 3211; the ear portion 3211 may abut against the arc groove 3242 after being separated from the groove 3241.

The shaft sleeve 324 is further provided with a hexagonal dismounting portion 3243 for facilitating mounting and dismounting.

Referring to fig. 15 to 17, the sleeve 324 has a guide hole 3245 penetrating in an axial direction, and a through hole 3244 communicating with the guide hole 3245 and having a smaller diameter than the guide hole 3245 is formed on a bottom surface of the groove 3241, and a first step surface is formed at a boundary between the guide hole 3245 and the through hole 3244;

the positioning pin 322 comprises a rod portion 3221 with a smaller diameter at the upper part and a pin portion 3222 with a larger diameter at the lower part, and a second step surface is formed between the rod portion 3221 and the pin portion 3222;

the spring 323 is clamped between the first step surface and the second step surface.

Referring to fig. 13 and 14, when the ear portion 3211 is inserted into the groove 3241, the pin 3222 is positioned downward and can be inserted into the positioning pin sleeve 326, and at this time, as shown in fig. 13, in the locked state, the mounting plate 311 cannot slide. The lug 3211 is separated from the groove 3241, and when the lug 3211 abuts against the circular groove 3242, the pin 3222 is located at an upper position and has no engagement with the positioning pin sleeve 326, as shown in fig. 14, which is in an unlocked state, and the mounting plate 311 can slide.

The two groups of the pull rod connecting parts 33 are respectively positioned at two sides of the rotary connecting part 34, one end of each pull rod connecting part 33 close to the rotary connecting part 34 is pivoted with the rotary connecting block 341, and one end far away from the rotary connecting part 34 is respectively connected with one middle part 31;

the rotation connecting part 34 is provided with a rotation connecting block 341, the rotation connecting block 341 is rotationally matched with a rotation base 343 through a rotation rod 342, and two ends of the rotation connecting block 341 are respectively used for connecting the pull rod connecting part 33;

the positioning portion 32 further has: and a limit rod 327 disposed on the fixture base 1 and located in the sliding direction of the mounting plate 311.

The pull rod connecting part 33 is provided with a pull rod 331, pull rod connecting blocks 332 and a locking nut 333, wherein the pull rod 331 is composed of a rod part 3311 and threaded connecting parts 3312 positioned at two ends of the rod part 3311, the threaded connecting parts 3312 are external threaded rods, each threaded connecting part 3312 is respectively in threaded connection with one pull rod connecting block 332, and the locking nut 333 is arranged on the threaded connecting part 3312; the pull rod connecting block 332 has a connecting bottom hole 3322 and a rotating hole 3321, the connecting bottom hole 3322 is threadedly connected to the threaded connecting portion 3312, and the rotating hole 3321 is pivotally connected to the rotating connecting block 341 through a bolt or a pin, or is connected to the middle portion 31.

Referring to fig. 18 and 19, the rotating lever 342 has a lever body with a shoulder 3421 at the top thereof and an anti-rotation plane 3422 at an end thereof away from the shoulder 3421; the rotating base 343 has a rotating hole 3431 into which the lever body is inserted, and a rotation preventing bottom hole 3432 perpendicular to the rotating hole 3431.

The checking fixture body 2 is provided with a group of opposite through notches, and the centering device 3 is positioned on a connecting line of the notches.

The positioning device 4 is described below, referring to fig. 20 and 21, the positioning device 4 is used for fixing the object to be detected a, and the positioning device 4 has a base, a clamping part 41, a clamping rod 42, a positioning connecting block 43, a rotary positioning block 45 and a positioning plate 47; the base and the positioning plate 47 are respectively and fixedly arranged on the checking fixture base 1, one end of the clamp part 41 is arranged on the base, the other end of the clamp part is connected with the clamping rod 42, the positioning connecting block 43 is arranged on the clamping rod 42, the positioning connecting block 43 is provided with a connecting groove, and the rotary positioning block 45 is pivotally connected with two walls of the connecting groove through a rotating shaft 46; the rotary positioning block 45 has at least one positioning surface, and the positioning surface and the positioning plate 47 are matched to clamp the workpiece a to be detected.

The positioning plate 47 comprises a sign-shaped part 471 and an installation part 472, the installation part 472 is fixedly connected with the checking fixture base 1, the sign-shaped part 471 faces the rotary positioning block 45, a reference cushion block 23 is arranged on the surface facing the rotary positioning block 45 to avoid scratching the workpiece a, and the reference cushion block 23 has the same function as the reference cushion block 23 on the top of the support body 22.

The positioning surface comprises two positioning surfaces which form an acute angle, namely a first positioning surface 451 and a second positioning surface 452. The positioning connecting block 43 is provided with a threaded hole, the clamping rod 42 is provided with an external thread, the positioning connecting block 43 is in threaded connection with the clamping rod 42, and the clamping rod 42 is further provided with a locknut 44.

Of course, in some preferred embodiments, there is also a clamping pincer 5, similar to the positioning means 4, however, this clamping pincer 5 is fixed to the checking fixture base 1, the head of which has jaws to clamp the article a.

The entire structure of the present application will be described below with reference to one embodiment, and for convenience of understanding, the respective components will be described separately after being disassembled.

Examine a base 1: this examine installation subject of utensil.

Examine a body 2: the support body is fixedly arranged on the checking fixture base 1 through screws and used for placing a workpiece processed according to the profile of the workpiece. The checking fixture body 2 mainly comprises a periphery body 21, a middle supporting body 22 and a reference cushion block 23.

The periphery body 21: for the main structure of the checking fixture body, the checking fixture is arranged along the periphery of a workpiece, fixedly mounted on the checking fixture base 1 and used for supporting and supporting the workpiece, the machining surface of the checking fixture is offset and machined by taking the molded surface of the workpiece as a reference, the periphery design can reduce the using amount of the checking fixture body and the manufacturing and machining amount, and meanwhile, the weight and the cost of the checking fixture are reduced.

The middle support body 22: for improving the supporting effect and preventing the deformation of the middle area of the hood outer plate, four middle supporting bodies 22 are arranged inside the circumference body 21 and in the middle area of the workpiece, and each reference cushion block 23 is arranged on each middle supporting body 22 and used for being in contact with the workpiece to support.

The reference cushion blocks 23 are also uniformly arranged on the processing profile of the circumference body 21, and the workpiece is in contact with and supported by the reference cushion blocks 23.

The centering device 3 mainly includes a centering portion 31, a positioning portion 32, a tie bar connecting portion 33, and a rotation connecting portion 34.

For the middle portion 31: the centering device 3 acts on two ends of the workpiece A, is arranged on two sides of the workpiece A and is connected through a pull rod connecting part.

Mounting plate 311: to the mounting body of the middle part 31.

Mounting the bracket 312: the pin is fixedly arranged on the mounting plate 311 through a screw pin, and a pin bush mounting hole 3121 is further processed at the top of the upper end of the pin for mounting the pin bush 313. One side of the side surface is provided with a rotation stopping hole 3122 which is vertical to the axial direction of the pin bush mounting hole 3121, and the rotation stopping hole 3122 is inserted by a screw or a pin and is matched with a rotation stopping plane 3132 on the pin bush 313 to play a role of rotation stopping.

Pin bushing 313: the positioning pin is of a cylindrical structure, and an internal thread hole 3131 is formed in the middle of the positioning pin and used for installing the positioning pin 314 of the workpiece; the outer surface is formed with a rotation stop flat 3132 for preventing rotation during use. Function of the pin sleeve 313: the positioning pin 314 of the workpiece is in threaded connection, the precision of the threaded connection position is difficult to control, if the positioning pin 314 is directly installed on the installation workpiece 312, the position of the positioning pin 314 of the installed workpiece on the upper surface of the installation bracket 312 is difficult to control, and if a threaded bottom hole is processed incorrectly, the installation bracket 312 is scrapped integrally. Through the use of the pin sleeve 313, after the part-making positioning pin 314 is matched with the pin sleeve 313 for installation, the regular cylinder of the pin sleeve 313 is used for positioning and installation, the installation precision control is convenient to realize, in addition, the internal thread machining error only needs to replace the machining pin sleeve 313, and the cost is low.

Workpiece positioning pin 314: the upper end of the positioning rod is in a cylindrical rod shape, and the positioning rod is contacted with the edge of a workpiece after the position of the positioning rod is moved so as to center and position the workpiece; the lower part is provided with an external thread matched with the pin sleeve 313 and is fixedly arranged inside the pin sleeve 313 through thread matching.

Upper guide block 315: the guide groove is fixedly arranged on the mounting plate 311, the guide groove is of an I-shaped structure with a wide upper part and a wide lower part and a narrow middle part, and the narrow middle part is of an inwards concave isosceles trapezoid structure. The guide groove is matched with the lower guide block 316 for guiding and sliding. This kind of guide chute structure can improve and lead smooth direction precision. The upper guide block moves by pneumatic pushing and is restrained by a restraint bar 327.

Lower guide block 316: the fixed mounting is on examining a base 1, for "worker" font structure, and the middle isosceles trapezoid structure that is the indent of both sides is with last guide block 315 cooperation.

Connecting block 317: and the fixed mounting is arranged on the mounting plate 311 and is used for being hinged with the connecting part of the pull rod.

The positioning portion 32: the positioning portion 32 is mainly used for positioning and locking the centering device 3 after the centering device moves in place, and preventing the centering device from shaking again, and mainly comprises an operation block 321, a positioning pin 322, a spring 323, a shaft sleeve 324, a positioning base 325, a positioning pin sleeve 326 and a limiting rod 327.

Operation block 321: for holding the operation part, the lower end is provided with two opposite lug parts 3211, and the end surface of each lug part 3211 is processed into an arc surface; the middle of the lug portion 3211 is a cylindrical hole; the bottom of the cylindrical hole is provided with a mounting bottom hole 3212 for connecting the positioning pin 322.

Positioning pins 322: the structure is roughly a stepped rod shape and is divided into a rod part 3221 and a pin part 3222, wherein an external thread matched with the operating block 321 in a threaded manner is processed at one end of the rod part 3221 connected with the operating block 321; the other end of the rod part is provided with a pin part 3222, which is used for performing accurate positioning through the positioning pin 322 after the upper guide block 315 moves in place, so that the positioning pin 314 of the workpiece can accurately position and center the edge of the workpiece.

The spring 323: one end of the sleeve is pressed against the step of the pin 3222 and the other end of the sleeve acts on the sleeve 324, so that the positioning pin 322 is in two states through the spring 323. When the positioning pin is not in a positioning state, the operation block 321 is pulled upwards and rotated by 90 degrees, so that the lug boss 3211 on the operation block is clamped on the circular arc groove 3242 on the shaft sleeve 324, the pin part of the positioning pin 322 completely exits the positioning pin sleeve 326, and the spring is compressed at the moment; when the positioning state is changed, the operation block 321 is pulled up and rotated by 90 degrees, so that the protruding lug portion 3211 on the operation block is clamped in the groove 3241 on the shaft sleeve 324, and at the moment, the pin portion 3222 enters the positioning pin sleeve 326 for fine positioning under the action of spring extension and recovery pushing, so that the operation convenience is improved, and meanwhile, the situation that the operation block 321-level positioning pin 322 is rocked without limit in the axis direction can be avoided.

The shaft sleeve 324: the positioning pin 322 is arranged on the mounting plate 311 in an interference fit manner, and the upper part of the mounting plate is provided with a groove 3241 which is used for converting the working state of the positioning pin 322, is matched with the lug portion 3211 in the working state and has the same width; a through hole 3224 for the rod portion 3221 of the positioning pin 322 to pass through is processed in the middle of the bottom of the groove; arc grooves 3242 which are matched with the arc end surfaces of the lug parts 3211 in a non-working state are respectively machined on two sides of the groove 3241. The middle part of the shaft sleeve is a hexagonal dismounting part, and the periphery of the shaft sleeve is processed into a structure similar to a hexagonal nut, so that the shaft sleeve 324 can be conveniently mounted and dismounted; the bottom of the sleeve 324 is provided with a guide hole 3245 for guiding the pin 3222 of the positioning pin 322 to move up and down.

The positioning base 325: through a screw pin fixed mounting on examining a utensil base 1, the upper end processing has the mounting hole to be used for fixed installation location cotter 326, and the side processing has the hole of splines for prevent that location cotter 326 from taking place to rotate.

Locating pin sleeve 326: is fixedly arranged on the positioning base 325 and is matched with the positioning pin 322 for fine positioning.

The stopper rod 327: and the upper guide block 315 and the lower guide block 316 are fixedly arranged on the gauge bases 1 at two ends of the upper guide block and the lower guide block respectively in the moving direction, and the installation position is the maximum distance of the left-right movement of the upper guide block 315. The end of the limiting rod 327 is made of polyurethane material, and is used for limiting the abutting stroke of the upper guide block 315 after moving in place.

The link connection portion 33: mainly comprises a pull rod 331, a pull rod connecting block 332 and a locking nut 333

The pull rod 331: the main part outside is regular hexagon, and both ends are processed respectively and are had the external screw thread, connect pull rod connecting block 332 through screw-thread fit.

The pull rod connecting block 332: one end of the connecting rod is provided with an internal threaded hole 3321 in threaded connection with the pull rod 331, the other end of the connecting rod is semicircular and provided with a rotary hinge hole 3222, and the connecting rod 317 is connected in a hinge mode.

Locking nut 333: after the pull rod 331 is in threaded connection with the connecting block 317, in order to prevent the threaded connection from loosening after long-term use, secondary locking and looseness prevention are carried out through the locking nut 333.

The rotation connecting portion 34: mainly comprises a rotary connecting block 341, a rotary rod 342 and a rotary base 343, and is used for realizing the connection of the pull rod connecting parts 33 at two sides.

The rotating connecting block 341: the structure is I-shaped, and the left and right extending parts are provided with through holes and connected with the pull rod connecting block 332 through a rotating shaft. The I-shaped column part is provided with a through hole for installing a rotating rod 342 to realize the rotating connection of the I-shaped connecting block 341, thereby realizing the hinging of the pull rod connecting parts at two sides.

The rotating rod 342: the main body is of a rod-shaped structure, a shoulder 3421 is arranged at one end of the main body, and an anti-rotation plane 3422 is processed on the rod part, so that the rotating rod 342 is always in a fixed state, and the hinge rotation effect in the process of switching the I-shaped state is ensured. The rotating lever 342 is mounted on the rotating reference 343. The rotating base 343 is fixedly mounted on the gauge base 1 through a screw.

The positioning device 4: the device mainly comprises two clamping parts 41, a clamping rod 42, a positioning connecting block 43, a locknut 44, a rotary positioning block 45, a rotating shaft 46 and a positioning device 4 of a positioning plate 47, wherein the two sides of the positioning device 4 are approximately parallel to the moving direction of an upper guide block 315.

The clamping portion 41: the clamp is the same as the rotary pressing part of a conventional checking fixture clamp in structure, and can be opened and closed.

Positioning connecting block 43: the clamping rod 42 is fixedly arranged on the clamping part 41, and one end of the clamping rod is connected with the clamping rod 42 through thread fit and is locked and prevented from loosening by using a loosening-preventing nut 44. The other end is processed with a groove, and two side walls of the groove are processed with penetrating rotating holes.

Rotating the positioning block 45: the second positioning surface 452 is positioned and then contacted with the hair cover edge bending part, the surface connected with the standing surface is an original surface, and the first positioning surface 451 is contacted with the original surface. That is, the angle between the first positioning surface 451 and the second positioning surface 452 is consistent with the shape of a product bent correspondingly at the edge of the product on the checking fixture, so that the hair cover can be clamped into the bent position by rotating the first positioning surface 451 and the second positioning surface 452 of the positioning block and positioned in the direction approximately perpendicular to the centering device by adjusting the fit. When the positioning device 4 is closed, the reference pad 23 is attached to the peripheral body 21 corresponding to the first positioning surface 451, and the reference pad 23 is attached to the fitting part 471 of the upper end of the positioning plate corresponding to the second positioning surface 452. It should be understood that the positions of the first positioning surface 451 and the second positioning surface 452 in fig. 20 and 21 are shown for convenience of understanding, and the specific positions and the matching relationship may be confirmed as required in practice.

Positioning plate 47: the positioning device 4 is fixedly arranged on the checking fixture body 1, the upper end of the positioning device is a character-shaped part 471, a reference cushion block 23 is arranged on the character-shaped part, and the positioning device is matched with the second positioning surface 452 to clamp the bending surface of the workpiece when the positioning device is closed; the lower end is a fixed mounting 472.

The clamping pincers 5: and the conventional clamp is used for clamping the periphery of the workpiece after positioning is finished.

The use method of the workpiece checking fixture comprises the following steps:

in the initial state, the jaws are open, the two centring portions 31 of the centring device being located away from the edge of the article

During the use, send out the lid planking with the finished piece and place on examining a body 2, examine benchmark cushion 23 and finished piece surface contact support plate on a body 2. The upper guide blocks 315 on the middle part 31 are respectively pushed to approach the product by pneumatic through an air circuit switch, the centering part 31, the pull rod connecting part 33 and the rotary connecting part 34 in the centering device move through the hinge connection among all the parts, after the components move to the set position, the operation block 321 on the positioning part 32 is lifted and rotated by 90 degrees, then the operation block 321 is loosened to enable the positioning pin 322 to be inserted into the positioning pin sleeve 326 for accurate positioning, and the centering positioning of the centering part 31 in one horizontal direction (the moving direction of the upper guide block 315) of the product is completed.

Subsequently, positioning in the other direction substantially perpendicular to the moving direction of the upper guide block 315 in the horizontal direction is achieved using the positioning device 4. Closing the clamping part 41 to enable the rotary positioning block 45 to gradually approach the product part, enabling the rotary positioning block 45 to be in contact with the surface A of the product and rotate, and enabling the first positioning surface 451 and the second positioning surface 452 to gradually fit with two surfaces of the product bending surface respectively through micro adjustment until the two surfaces are completely fitted, so that positioning in the other direction is completed. Since the positioning is performed by rotating the two intersecting surfaces of the first positioning surface 451 and the second positioning surface 452 of the positioning block 45, the positioning accuracy in this direction is also high. In addition, it is also possible to easily determine whether or not the precision of the bent surface at the position is acceptable in the process of gradually bringing the first positioning surface 451 and the second positioning surface 452 close to each other and bonding them.

After the positioning is finished, the clamping pincers 5 are closed, the product workpiece is stably clamped, and shaking is prevented during detection.

The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.

Claims (8)

1. A utensil is examined to preparation, its characterized in that includes:

a gauge base (1);

the gauge body (2) is fixedly arranged on the gauge base (1), the gauge body (2) is provided with a peripheral body (21) and a middle supporting body (22), the peripheral body (21) is provided with an outer ring corresponding to the appearance of a standard workpiece, and the middle supporting body (22) is positioned in the peripheral body (21);

the centering device (3) is used for adjusting the detection position of the workpiece (A) to be detected;

the positioning device (4) is used for fixing a workpiece (A) to be detected, and the positioning device (4) is provided with a base, a clamping part (41), a clamping rod (42), a positioning connecting block (43), a rotary positioning block (45) and a positioning plate (47); wherein,

the base and the positioning plate (47) are respectively and fixedly arranged on the checking fixture base (1), one end of a clamping part (41) is arranged on the base, the other end of the clamping part is connected with the clamping rod (42), a positioning connecting block (43) is arranged on the clamping rod (42), the positioning connecting block (43) is provided with a connecting groove, and the rotary positioning block (45) is in pivot connection with two walls of the connecting groove through a rotating shaft (46);

the rotary positioning block (45) is provided with at least one positioning surface, and the positioning surface is matched with the positioning plate (47) to clamp the workpiece (A) to be detected;

the centering device is provided with a centering part (31), a pull rod connecting part (33) and a rotating connecting part (34);

the rotary connecting part (34) is provided with a rotary connecting block (341), the rotary connecting block (341) is in running fit with the rotary base (343) through a rotary rod (342), and two ends of the rotary connecting block (341) are respectively used for connecting the pull rod connecting parts (33);

the two groups of pull rod connecting parts (33) are respectively positioned at two sides of the rotary connecting part (34), one end of each pull rod connecting part (33) close to the rotary connecting part (34) is pivoted with the rotary connecting block (341), and one end far away from the rotary connecting part (34) is respectively connected with one pair of middle parts (31);

the middle part (31) is provided with a mounting plate (311) which is arranged in a sliding mode, a mounting bracket (312) is arranged on the mounting plate (311), and a workpiece positioning pin (314) is arranged at the top of the mounting bracket (312);

the centering device further has a positioning portion (32), the positioning portion (32) having:

a positioning base (325) which is positioned at the bottom of the mounting plate (311) and is provided with a positioning hole;

the positioning pin (322) penetrates through a through hole formed in the mounting plate (311) and is inserted into the positioning hole so as to position the mounting plate (311);

the positioning section (32) further includes:

the operation block (321) is positioned on the mounting plate (311) and is fixedly connected with the top end of the positioning pin (322);

the shaft sleeve (324) is sleeved in the through hole, and the positioning pin (322) is slidably sleeved in the shaft sleeve (324);

a spring (323) located between the bushing (324) and the dowel pin (322);

and the positioning pin sleeve (326) is sleeved in the positioning hole and is in plug-in fit with the bottom end of the positioning pin (322).

2. The article testing fixture of claim 1,

the positioning surfaces comprise two positioning surfaces which form an acute included angle and are respectively a first positioning surface (451) and a second positioning surface (452); and/or the presence of a gas in the gas,

the positioning plate (47) comprises a sign-shaped part (471) and an installation part (472), the installation part (472) is fixedly connected with the checking fixture base (1), the sign-shaped part (471) faces the rotary positioning block (45), and a reference cushion block (23) is arranged on the surface facing the rotary positioning block (45).

3. The article testing fixture of claim 1,

the positioning connecting block (43) is provided with a threaded hole, the clamping rod (42) is provided with an external thread, the positioning connecting block (43) is in threaded connection with the clamping rod (42), and the clamping rod (42) is further provided with a locknut (44).

4. The article testing fixture of claim 1,

a mounting bottom hole (3212) is formed at the bottom of the operating block (321) and used for mounting the positioning pin (322), and a lug part (3211) is formed at the periphery of the mounting bottom hole (3212);

a groove (3241) is formed in the top of the shaft sleeve (324), the shaft sleeve is detachably connected with the lug boss (3211) in an inserting mode, an arc groove (3242) is formed in the top of the side wall of the two sides of the groove (3241), the depth of the arc groove (3242) is smaller than that of the groove (3241), and the arc groove (3242) is used for supporting the lug boss (3211); and/or the presence of a gas in the gas,

a hexagonal removal portion (3243) is also formed on the sleeve (324).

5. The article inspection fixture of claim 4,

the shaft sleeve (324) is provided with a guide hole (3245) which penetrates through in the axial direction, a through hole (3244) which is communicated with the guide hole (3245) and is smaller than the guide hole (3245) in diameter is formed in the bottom surface of the groove (3241), and a first step surface is formed at the junction of the guide hole (3245) and the through hole (3244);

the positioning pin (322) comprises a rod part (3221) with a smaller diameter at the upper part and a pin part (3222) with a larger diameter at the lower part, and a second step surface is formed between the rod part (3221) and the pin part (3222);

a spring (323) is clamped between the first step surface and the second step surface.

6. The article testing fixture of claim 1,

the top of the mounting bracket (312) is provided with an axial pin bush mounting hole (3121) and a rotation stopping hole (3122) which is perpendicular to the pin bush mounting hole (3121);

a pin bush (313) is arranged in the pin bush mounting hole (3121), the pin bush (313) is provided with an internal threaded hole (3131) and is in threaded connection with the workpiece positioning pin (314), and the outer wall of the pin bush (313) is also provided with a rotation stopping plane (3132);

and a screw or a pin is inserted into the rotation stopping hole (3122) and abuts against the rotation stopping plane (3132) to perform the rotation stopping function.

7. The article testing fixture of claim 1,

the pair of intermediate portions (31) further has:

the lower guide block (316) is fixedly arranged on the checking fixture base (1);

the upper guide block (315) is in sliding fit with the lower guide block (316), and the mounting plate (311) is fixedly arranged on the upper guide block (315);

and the connecting block (317) is fixedly arranged on the upper guide block (315) or the mounting plate (311) and is connected with the pull rod connecting part (33).

8. The article testing fixture of claim 1,

the pull rod connecting part (33) is provided with a pull rod (331), a pull rod connecting block (332) and a locking nut (333), wherein,

the pull rod (331) is composed of a rod part (3311) and threaded connection parts (3312) located at two ends of the rod part (3311), the threaded connection parts (3312) are external threaded rods, each threaded connection part (3312) is in threaded connection with one pull rod connection block (332), and the locking nut (333) is arranged on the threaded connection parts (3312);

pull rod connecting block (332) has connection bottom hole (3322) and rotatory hole (3321), connect bottom hole (3322) with threaded connection portion (3312) threaded connection, rotatory hole (3321) through bolt or round pin axle with rotatory connecting block (341) pin joint, or with connect middle part (31).