CN216758728U

CN216758728U - Blind hole machining clamp for gem measuring head

Info

Publication number: CN216758728U
Application number: CN202122977777.1U
Authority: CN
Inventors: 徐刚; 邱行; 陈锋
Original assignee: Chongqing Chuanyi Automation Co Ltd
Current assignee: Chongqing Chuanyi Automation Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-06-17
Anticipated expiration: 2031-11-30

Abstract

A blind hole processing clamp of a gem measuring head comprises a base, a concave cavity is arranged at the upper end of the base, a pressing sleeve is arranged in the concave cavity, a compression spring is arranged between the pressing sleeve and the base, a taper hole with a big top and a small bottom is arranged at the upper end of the pressing sleeve, a taper clamping end with a big top and a small bottom is arranged at the upper end of a hollow multi-claw elastic chuck, the taper angle of the taper clamping end is the same as that of the taper hole, a workpiece placing groove is arranged at the upper end of the taper clamping end, the taper clamping end is equally divided into a plurality of elastic clamping parts through an elastic opening extending axially, the multi-claw elastic chuck penetrates through the pressing sleeve to enable the elastic clamping parts to be positioned in the taper hole and enable the elastic clamping parts to be elastically deformed through the taper hole, a cover plate is fixedly connected at the upper end of the pressing sleeve, a stepping hole is arranged on the cover plate and corresponds to the workpiece placing groove, the aperture of the stepping hole is larger than the maximum diameter of the taper clamping end in a free state, and an internal thread hole is arranged at the other end of the multi-claw elastic chuck, the screw passes through the base and is fixedly connected with the internal thread hole of the multi-jaw collet.

Description

Blind hole machining clamp for gem measuring head

Technical Field

The utility model relates to the technical field of blind hole machining, in particular to a blind hole machining clamp for a gem measuring head.

Background

The gem ball is made of artificial sapphire and ruby monocrystals, has the characteristics of corrosion resistance, wear resistance, ultrahigh hardness, good rigidity and the like, and is often used for manufacturing a measuring head for a precision measuring instrument.

At present, when the existing clamp is used, a workpiece needs to be installed in a clamp base firstly, then the workpiece is tightly screwed and compacted through a threaded cover plate, and then the whole clamp is installed on a three-jaw chuck. When the laser machine carries out the blind hole processing to the precious stone ball, use current anchor clamps to have a great deal of inconvenience in actual operation:

1. the spring screw that at every turn the material loading all needs on the manual rotation laser machine takes off whole anchor clamps, installs another anchor clamps that are equipped with the work piece on the laser machine again, and still need unscrew the thread cover board of anchor clamps and change the work piece, complex operation, it is consuming time longer, frequent dismouting anchor clamps still cause anchor clamps to take place wearing and tearing easily, lead to the mounted position to produce the error from this to influence the machining precision of blind hole.

2. When a plurality of workpieces with the same size are machined, a plurality of clamps need to be prepared for rotation, the clamp installation position can be changed frequently by replacing the clamp every time, when the center position of the clamp is adjusted through a fine screw at every time, the clamp is easy to displace up and down, the clamp is required to be pressed to the bottom by hand after the adjustment is completed, the installation position is easy to have errors due to human factors at the moment, uncertain factors are more when the clamp is replaced, at least 50s is needed for clamping the clamp and adjusting the position every time, and if the time needed for installing the workpiece is added, the clamping time of the workpiece before machining is more than one minute, and the machining efficiency is low.

3. Frequent screwing of the spring screw on the laser machine can accelerate the abrasion speed of the spring screw, easily causes the spring screw to slide, and shortens the service life of the spring screw.

Disclosure of Invention

The utility model aims to provide a blind hole machining clamp for a gem measuring head, which simplifies the operation process, can greatly shorten the workpiece replacement time, improves the machining efficiency and can ensure the position precision of the workpiece.

The technical scheme of the utility model is as follows: a blind hole machining clamp for a gem measuring head comprises a base, wherein a cavity is arranged at the upper end of the base, a pressing sleeve is arranged in the cavity, a compression spring is arranged between the pressing sleeve and the base, the pressing sleeve is in sliding fit in the cavity of the base through the compression spring, a taper hole with a large top and a small bottom is arranged at the upper end of the pressing sleeve, a taper clamping end with a large top and a small bottom is arranged at the upper end of a hollow multi-claw elastic chuck, the taper angle of the taper clamping end is the same as that of the taper hole, a workpiece placing groove is arranged at the upper end of the taper clamping end, the taper clamping end is equally divided into a plurality of elastic clamping parts through an elastic opening extending axially, the multi-claw elastic chuck penetrates through the pressing sleeve to enable the elastic clamping parts to be located in the taper hole and enable the elastic clamping parts to be elastically deformed through the taper hole, an upper end of the pressing sleeve is fixedly connected with a cover plate, a abdicating hole is arranged on the cover plate to correspond to the workpiece placing groove, the aperture of the abdicating hole is larger than the maximum diameter of the conical clamping end in a free state, the other end of the multi-jaw elastic chuck is provided with an internal threaded hole, and a screw passes through the base to be fixedly connected with the internal threaded hole of the multi-jaw elastic chuck.

Furthermore, a spring positioning groove is formed in the pressing sleeve and located below the taper hole, a guide protrusion extending into the groove is arranged at the bottom of the spring positioning groove, and a guide hole is formed in the center of the guide protrusion and communicated with the taper hole.

Furthermore, an annular flange is arranged on the cover plate, and an annular groove for inserting the annular flange is formed in the upper end of the pressing sleeve.

Furthermore, the annular flange and the annular groove are fixed in an adhering mode or in a welding mode.

Furthermore, a stepped hole is formed in the cavity bottom of the concave cavity of the base, the lower end of the stepped hole is a small-diameter hole, and the diameter of the large-diameter hole in the upper end of the stepped hole is the same as that of the lower end of the multi-jaw elastic chuck.

Furthermore, a locking nut is arranged between the base and the screw.

Furthermore, the multi-jaw collet is a three-jaw collet.

Adopt above-mentioned technical scheme: this anchor clamps are when using, the precious stone measuring head of treating processing passes through the frock and places in multi-jaw collet's work piece standing groove, press the cover under compression spring's tensile effect, make the taper hole press from both sides tight and extrude multi-jaw collet's elasticity clamping part, let elasticity clamping part take place elastic deformation and press from both sides tight precious stone measuring head all around, when processing completion needs change work piece, press the apron, make and press the cover and lap the downstream together, compression spring contracts under the extrusion of pressing the cover, let the taper hole of pressing the cover loosen elastic clamping part, elastic clamping part resumes elastic deformation, can change the work piece. The whole clamp does not need to be taken down when the workpiece is replaced by the clamp, the multi-jaw elastic chuck does not need to be taken out, and therefore when the workpiece of the same specification is machined, the positions of the clamp and the multi-jaw elastic chuck cannot be changed, the position precision of the workpiece can be guaranteed, machining errors caused by the change of the position of the workpiece are avoided, the workpiece can be replaced only by pressing the cover plate, the operation is simple, the workpiece replacement time can be greatly shortened, the machining efficiency is improved, and the operation time of workers is saved.

The utility model is further described with reference to the drawings and the specific embodiments in the following description.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a multi-jaw collet of the present invention;

FIG. 3 is a schematic diagram of the structure of the elastic clamping portion of the multi-jaw collet;

FIG. 4 is a schematic structural view of the press sleeve of the present invention;

FIG. 5 is a cross-sectional view A-A of FIG. 4;

FIG. 6 is a schematic view of the cover plate according to the present invention;

FIG. 7 is a schematic structural view of a base according to the present invention;

fig. 8 is a schematic structural view of the screw of the present invention.

Detailed Description

Referring to fig. 1 to 8, an embodiment of a blind hole machining fixture for a gem measuring head comprises a base 1, wherein a concave cavity 2 is arranged at the upper end of the base 1, a pressing sleeve 3 is arranged in the concave cavity 2, a compression spring 4 is arranged between the pressing sleeve 3 and the base 1, the pressing sleeve 3 is in sliding fit in the concave cavity 2 of the base 1 through the compression spring 4, and the pressing sleeve 3 can move up and down along with the expansion and contraction of the compression spring 4. The upper end of the pressing sleeve 3 is provided with a taper hole 5 with a large upper part and a small lower part, the upper end of a hollow multi-claw elastic chuck 6 is provided with a taper clamping end 7 with a large upper part and a small lower part, the angle of the conical surface of the taper clamping end 7 is the same as that of the taper hole 5, the shape of the taper clamping end 7 is matched with that of the taper hole 5 of the pressing sleeve 3, and the upper end of the taper clamping end 7 is provided with a workpiece placing groove 8 for placing a gem measuring head to be processed. Taper clamping end 7 equally divide into a plurality of elasticity clamping parts 10 through the elasticity opening 9 of axial extension, elasticity opening 9 reserves elastic deformation's space for elasticity clamping part 10, and the multi-jaw collet 6 of this embodiment adopts three-jaw collet, and then the quantity of elasticity clamping part 10 is three, makes elasticity clamping part 10 can follow three direction and presss from both sides tight precious stone measuring head, and stability is better. The multi-jaw elastic chuck 6 penetrates through the pressing sleeve 3 and the compression spring 4 to enable the elastic clamping portion 10 to be located in the taper hole 5, and the elastic clamping portion 10 is elastically deformed through the taper hole 5, so that the elastic clamping portions 10 are close to the center to clamp a gem measuring head located in the workpiece placing groove 8. The upper end fixed connection apron 11 of pressing cover 3, set up annular flange 18 on the apron 11, press the cover 3 upper end to set up one and supply annular flange 18 male ring channel 19, make annular flange 18 insert in the ring channel 19 bonding fixation, or welded fastening, press cover 3 and apron 11 to be organic glass material in this embodiment, consequently annular flange 18 adopts bonding fixation with ring channel 19. Set up one on the apron 11 and step down hole 12 and work piece standing groove 8 and correspond, the maximum diameter when stepping down the aperture of hole 12 and being greater than 7 free states of taper exposed in the hole 12, make the work piece standing groove 8 of taper exposed in the hole 12 of should stepping down, be convenient for change the precious stone measuring head to and make the precious stone measuring head expose in the processing field of vision, leave the operating space of blind hole processing, 6 lower extremes of multi-claw collet chuck set up internal thread hole 13, and a screw 14 passes base 1 and is connected fixedly with the internal thread hole 13 of multi-claw collet chuck 6, with multi-claw collet chuck 6 and base 1 fixed connection, set up a lock nut 21 between base 1 and the screw 14, improve the reliability of being connected of multi-claw collet chuck 6 and base 1 through lock nut 21. The bottom of the cavity 2 of the base 1 is provided with a stepped hole 20, the lower end of the stepped hole 20 is a small-diameter hole, and the diameter of a large-diameter hole at the upper end of the stepped hole 20 is the same as that of the lower end of the multi-jaw collet 6, so that the multi-jaw collet 6 can be limited in the large-diameter hole of the stepped hole 20.

Set up spring positioning groove 15 in the pressure cover 3, this spring positioning groove 15 is located the below of taper hole 5, spring positioning groove 15 tank bottom sets up the direction arch 16 that extends to the inslot, makes spring positioning groove 15 encircle around the protruding 16 that leads, and compression spring 4 empty cover is on protruding 16 that leads, plays the guide effect to compression spring 4's flexible through protruding 16 that leads, the center of protruding 16 that leads sets up guiding hole 17 and taper hole 5 intercommunication, supplies multi-jaw collet 6 to pass, for pressing the guide that reciprocates of cover 3.

This anchor clamps are when using, through base 1 with anchor clamps monolithic stationary at the processing equipment, on the three-jaw chuck of laser machine, the precious stone measuring head of treating processing passes through the frock and places in the work piece standing groove 8 of multi-jaw collet 6, press cover 3 under compression spring 4's tensile effect, extrude elasticity clamping part 10 through taper hole 5 and make it take place elastic deformation, thereby make elasticity clamping part 10 press from both sides tight precious stone measuring head all around, blind hole processing when the precious stone measuring head is accomplished, when needing to change the work piece, press apron 11, make press cover 3 and apron 11 to move down together, compression spring 4 contracts under the extrusion of pressing cover 3, let taper hole 5 of pressing cover 3 loosen elasticity clamping part 10, elasticity clamping part 10 resumes elastic deformation this moment, can easily take off the precious stone measuring head of processing completion and change.

When the workpiece is replaced by the clamp, the whole clamp does not need to be taken down, the multi-jaw collet 6 does not need to be taken out, and therefore when the workpiece of the same specification is processed, the positions of the clamp and the multi-jaw collet 6 cannot be changed, so that the position accuracy of the workpiece can be ensured, the processing error caused by the position change of the workpiece is avoided, when the workpiece of different specifications needs to be processed, only the multi-jaw collet 6 of the corresponding specification needs to be replaced, therefore, a plurality of sets of clamps do not need to be arranged on the workpiece of one specification, the material cost is saved, the workpiece can be replaced only by pressing the cover plate 11, the operation is simple, the time spent on clamping the workpiece at each time only needs 20s, the workpiece replacement time can be greatly shortened, the processing efficiency is improved, and the operation time of workers is saved.

Claims

1. The utility model provides a blind hole machining anchor clamps of precious stone measuring head, includes base (1), its characterized in that: the device is characterized in that a concave cavity (2) is arranged at the upper end of a base (1), a pressing sleeve (3) is arranged in the concave cavity (2), a compression spring (4) is arranged between the pressing sleeve (3) and the base (1), the pressing sleeve (3) is in sliding fit in the concave cavity (2) of the base (1) through the compression spring (4), a taper hole (5) with a large upper end and a small lower end is arranged at the upper end of the pressing sleeve (3), a taper clamping end (7) with a large upper end and a small lower end is arranged at the upper end of a hollow multi-claw elastic chuck (6), the taper angle of the taper clamping end (7) is the same as that of the taper hole (5), a workpiece placing groove (8) is arranged at the upper end of the taper clamping end (7), the taper clamping end (7) is equally divided into a plurality of elastic clamping parts (10) through an elastic opening (9) extending axially, the multi-claw elastic chuck (6) penetrates through the pressing sleeve (3), and the elastic clamping parts (10) are located in the taper hole (5), and make elastic clamping part (10) take place elastic deformation through taper hole (5), press an upper end fixed connection apron (11) of cover (3), it corresponds with work piece standing groove (8) to set up one hole of stepping down (12) on apron (11), the maximum diameter when stepping down the aperture in hole (12) and being greater than taper centre gripping end (7) free state, many claws collet (6) lower extreme sets up internal thread hole (13), and internal thread hole (13) that a screw (14) passed base (1) and many claws collet (6) are connected fixedly.

2. The blind hole machining jig for the gem measuring head according to claim 1, characterized in that: set up spring positioning groove (15) in pressing cover (3), this spring positioning groove (15) are located the below of taper hole (5), spring positioning groove (15) tank bottom sets up direction arch (16) that extend to the inslot, the center of direction arch (16) sets up guiding hole (17) and taper hole (5) intercommunication.

3. The blind hole machining jig for the gem measuring head according to claim 1, characterized in that: an annular flange (18) is arranged on the cover plate (11), and an annular groove (19) for inserting the annular flange (18) is arranged at the upper end of the pressing sleeve (3).

4. The blind hole machining jig for the gem measuring head according to claim 3, characterized in that: the annular flange (18) and the annular groove (19) are fixedly bonded or welded.

5. The blind hole machining jig for the gem measuring head according to claim 1, characterized in that: the multi-claw elastic chuck is characterized in that a stepped hole (20) is formed in the cavity bottom of the cavity (2) of the base (1), the lower end of the stepped hole (20) is a small-diameter hole, and the diameter of the large-diameter hole in the upper end of the stepped hole (20) is the same as that of the lower end of the multi-claw elastic chuck (6).

6. The blind hole machining jig for the gem measuring head according to claim 1, characterized in that: a locking nut (21) is arranged between the base (1) and the screw (14).

7. The blind hole machining jig for the gem measuring head according to claim 1, characterized in that: the multi-jaw collet (6) is a three-jaw collet.