CN209892125U - Chuck body - Google Patents

Abstract

The utility model relates to a chuck main part, including base and righting frame, righting and setting up the top of arranging the base in, righting the frame and comprising two stands, riser and upper cover plate, the upper cover plate is connected in the top of two stands and riser, the bottom of stand is provided with circular inserted block downwards, the top surface of base is provided with two inserted block holes, and two circular inserted blocks cartridge is downthehole in the inserted block respectively. The base and the righting frame are respectively manufactured by a base die and a model made by a righting frame die, the machining and manufacturing difficulty is low, the size deviation generated by the previous integral forming machining technology is avoided, and the base and the righting frame are fixedly connected through a plug-in mounting mode, so that the base and the righting frame have the advantages of high connection strength, long service life and convenience in installation.

Description

Chuck body

Technical Field

The utility model relates to a chuck main part for assembling C type air chuck belongs to mechanical technical field.

Background

The pneumatic chuck is mainly used for clamping pipe columns such as drill rods, oil pipes, sleeves and the like in oil and natural gas well workover operation. At present, a chuck main body in the pneumatic chuck is manufactured by adopting a special die in an integrated manner, the process difficulty is higher, the size deviation is large, the lifting and the lowering of a slip body cannot be synchronously operated in the using process, and the chuck main body manufactured by the integrated manner is low in connection strength and short in service life. Therefore, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned not enough, provide a chuck main part for assembling C type air chuck, it has the manufacturing degree of difficulty low, intensity is high, long service life, simple to operate's advantage.

The purpose of the utility model is realized like this: the utility model provides a chuck main part, includes base and righting frame, righting frame erects the top of arranging the base in, righting frame comprises two stands, riser and upper cover plate, the upper cover plate is connected in the top of two stands and riser, the bottom of stand is provided with circular inserted block downwards, the top surface of base is provided with two inserted block holes, and two circular inserted blocks cartridge respectively is downthehole in the inserted block.

Furthermore, the two stand columns are respectively erected on the top surface of the left front section and the top surface of the right front section of the base, the vertical plate is erected in the middle of the rear section of the base, a prismatic hole is formed in the upper section of the vertical plate, a stopping block bolt jack is arranged on the rear side surface of the lower section of the vertical plate, a stopping block is fixed in the stopping block bolt jack, a centering hole is formed in the middle section of the upper cover plate, the upper section of the centering hole is set to be a centering hole inclined plane in an inclined center, a centering frame notch is formed in the upper cover plate in front of the centering hole and communicated with the centering hole, and a centering frame pull rib is connected between the upper cover plates on the left side and the right side of the corresponding centering frame notch.

Furthermore, the center of the base is provided with a slip body mounting hole, the slip body is arranged in the slip body mounting hole, the top of the slip body mounting hole is provided with a slip body mounting hole inclined plane inclined towards the center, the middle section of the slip body mounting hole is provided with a slip body mounting hole conical surface with a gradually reduced diameter, a valve gap is arranged right ahead of the slip body mounting hole, the top surfaces of the bases at the left side and the right side of the valve gap rear section are provided with vertical insertion block holes, a base lacing wire is connected between the tops of the left inner side surface and the right inner side surface of the valve gap front section, the left side and the right side of the base middle section are respectively provided with a front mounting lug and a rear mounting lug, the top and the bottom of the base rear section are respectively backwards provided with a base upper mounting plate and a base lower mounting plate, the left section of the base lower mounting plate is provided with a cylinder fixing seat, and the left side and the right side of the bottom, the middle parts of the left base mounting plate and the right base mounting plate are provided with transverse waist-shaped holes.

Furthermore, the chuck body is made of a model made of a chuck body mold, the chuck body mold comprises a centering frame mold and a base mold, the centering frame is made of a model made of a centering frame mold, and the centering frame mold comprises a centering frame upper mold, a centering frame lower mold, a centering frame front mold, a centering frame rear mold, two first centering frame locking nuts, a second centering frame locking nut and a third centering frame locking nut; the base is made by the model that the base mould was made, the base mould includes mould, base bed die, base front middle mould, base back middle mould, two base front side moulds, base left side back side mould, base right side back side mould, four base locking Assembly and a plurality of base location bolts before the base mould includes base upper die, base bed die, base.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model relates to a chuck main part, its base and righting frame are made by base mould and righting frame mould respectively, and the manufacturing degree of difficulty is low, has avoided the produced dimensional deviation of integrated into one piece processing technology in the past, and mode fixed connection through the cartridge between base and the righting frame has joint strength height, long service life, simple to operate's advantage.

Drawings

Fig. 1 is a front view of the C-type air chuck of the present invention.

Fig. 2 is a top view of the present invention, which is a C-type air chuck.

FIG. 3 is a schematic view of the chuck body.

Fig. 4 is a schematic structural view of the centering frame.

Fig. 5 is a schematic structural view of the righting frame mold.

Fig. 6 is an exploded view of the centralizing frame mold.

Fig. 7 is a schematic structural view of a mold on a centering frame.

Fig. 8 is a schematic structural view of a lower mold of the centering frame.

Fig. 9 is another visual structure diagram of the lower mold of the righting frame.

Fig. 10 is a schematic structural view of a front mold of the centering frame.

Fig. 11 is a schematic structural view of a mold behind a centering frame.

Fig. 12 is a schematic structural view of the base.

Fig. 13 is another schematic view of the base.

Fig. 14 is a schematic structural view of the base mold when it is placed upright.

Fig. 15 is a schematic view of the structure of the base mold when it is placed upside down.

Fig. 16 is an exploded view of fig. 14.

Fig. 17 is a schematic view of the structure of the mold on the base.

Fig. 18 is another schematic view of the visual configuration of the mold on base with the movable blocks of the mold on base removed.

Fig. 19 is a schematic structural view of a base lower mold.

Fig. 20 is a schematic view of the structure of the base front middle mold.

Fig. 21 is a schematic view of the structure of the middle mold after the base.

Fig. 22 is a schematic structural view of the base front side mold.

FIG. 23 is a schematic structural view of the left rear side mold of the base with the movable block of the cylinder holder removed.

Fig. 24 is a schematic structural view of a cylinder fixing seat movable block in the left rear side die of the base.

Fig. 25 is a schematic structural view of the right rear side mold of the base.

FIG. 26 is a schematic view of a dental plate.

Figure 27 is a side view of a dental plate.

Fig. 28 is a sectional view taken along line a-a in fig. 27.

Fig. 29 is a schematic structural diagram of a milling locating pin embedding groove tool.

Fig. 30 is a schematic structural view of the sawing tool.

Fig. 31 is a front view of fig. 30.

Fig. 32 is a schematic structural view of the bevel milling tool.

Fig. 33 is a front view of fig. 32.

Fig. 34 is a schematic structural view of the gear shaper tooling.

Fig. 35 is a front view of fig. 34.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the utility model relates to a C-type pneumatic chuck, which comprises a chuck main body, a slip body 103 and a power mechanism, the chuck body comprises a base 101 and a righting frame 102, a dental plate 104 is arranged in the slip body 103, the power mechanism comprises a cylinder assembly 105, a connecting rod 106 driven by the cylinder assembly 105, a left crankshaft assembly 107 connected with the connecting rod 106 and a right crankshaft assembly 108 connected with the connecting rod 106, the left crank shaft assembly 107 consists of a left shaft 107.1, a left crank arm 107.2 and a left connecting shaft 107.3, the right crankshaft assembly 108 consists of a right shaft 108.1, a right crank arm 108.2 and a right connecting shaft 108.3, the left connecting shaft 107.3 and the right connecting shaft 108.3 are both fixedly connected with the connecting rod 106, the left shaft 107.1 and the right shaft 108.1 are respectively fixedly connected with the slip body 102 through a rotating arm 109, a shutter 111 is connected between the left front section and the right front section of the base 101 through a shutter pin 110.

Referring to fig. 4-11, the centering frame 102 is made of a mold made of a centering frame mold 200, and the centering frame mold 200 includes a centering frame upper mold 201, a centering frame lower mold 202, a centering frame front mold 203, a centering frame rear mold 204, two first centering frame lock nuts 205, a second centering frame lock nut 206, and a third centering frame lock nut 207.

The centering frame 102 is arranged at the top of the base 101, the centering frame 102 is composed of two upright posts 102.1, a vertical plate 102.2 and an upper cover plate 102.3, the upper cover plate 102.3 is connected to the tops of the two upright posts 102.1 and the vertical plate 102.2, the two upright posts 102.1 are respectively erected on the top surfaces of the left front section and the right front section of the base 101, the vertical plate 102.2 is erected on the top surface of the middle part of the rear section of the base 101, the upper section of the vertical plate 102.2 is provided with a prismatic hole 102.7, a back side surface of the lower section of the vertical plate 102.2 is provided with a stop block bolt insertion hole corresponding to a connecting rod 106, a stop block 102.4 is fixed in the stop block bolt insertion hole, a centering hole 102.5 is arranged on the upper cover plate 102.3, the upper section of the centering hole 102.5 is provided with a centering hole inclined plane 102.9 at the center, a centering frame gap is arranged on the upper cover plate 102.3 right ahead of the centering hole 102.5, the centering frame gap is communicated with the centering hole 102.5, and a left and right reinforcing rib is connected between the left and right reinforcing frame, the bottom end of the upright post 102.1 is provided with a circular insertion block 102.8 downwards.

The upper die 201 of the centering frame comprises a first trapezoidal block 201.3 of the upper die 201.1 of the centering frame, a boss 201.2 of the upper die 201.2 of the centering frame and a second trapezoidal block 201.4 of the upper die 201.1 of the centering frame, the boss 201.2 of the upper die of the centering frame is arranged in the center of the bottom plate 201.1 of the upper die of the centering frame, the boss 201.2 of the upper die of the centering frame sequentially comprises a conical section and a circular section with gradually reduced diameters from top to bottom, the outer side surface of the conical section of the boss 201.2 of the upper die of the centering frame corresponds to a centering hole inclined surface 102.9, the first trapezoidal block 201.3 of the upper die of the centering frame and the second trapezoidal block 201.4 of the upper die of the centering frame are respectively arranged on the left side and the right side of the boss 201.2 of the centering frame, and the rear sections of the inner side surfaces of the first trapezoidal block 201.3 of the upper die 201.3 of the centering frame and the second trapezoidal block 201.4 of the upper die of the centering frame and the middle section are arranged as inward concave surfaces, the front sections of the inner side surfaces of the first trapezoidal block 201.3 of the upper die of the centering frame and the second trapezoidal block 201.4 of the upper die of the centering frame are plane sections, the trapezoidal boss 201.5 of the upper die of the centering frame is arranged on the front centering side of the boss 201.2 of the upper die of the centering frame, the trapezoidal boss 201.5 of the upper die of the centering frame is connected with the boss 201.2 of the upper die of the centering frame, the top of the front section of the trapezoidal boss 201.5 of the upper die of the centering frame is provided with a rectangular groove 201.6 of the upper die of the centering frame along the length direction, and the rectangular groove 201.6 of the upper die of the centering frame corresponds to a tie bar 102.6 of the centering frame;

the left section and the right section of the die bottom plate 201.1 on the centering frame are provided with centering frame upper die locking holes 201.7, the die locking holes 201.7 on the two centering frames respectively penetrate through the rear section of the first trapezoidal block 201.3 of the die on the centering frame and the front section of the second trapezoidal block 201.4 of the die on the centering frame, the die locking holes 201.7 on the two centering frames are arranged in a central symmetry manner, the bottom surface of the front section of the first trapezoidal block 201.3 of the die on the centering frame and the bottom surface of the rear section of the second trapezoidal block 201.4 of the die on the centering frame are both provided with centering frame upper die positioning columns 201.8, and the die positioning columns 201.8 on the two centering frames are arranged in a central symmetry manner.

The lower die 202 of the righting frame comprises a lower die bottom plate 202.1 of the righting frame, a rectangular boss 202.2 of the righting frame is arranged at the middle section of the top surface of the lower die bottom plate 202.1 of the righting frame, a semi-circular groove 202.3 of the righting frame is arranged at the left section and the right section of the front side surface of the rectangular boss 202.2 of the righting frame, a counter bore 202.4 of the righting frame is arranged at the bottom of the semi-circular groove 202.3 of the righting frame, the counter bore 202.4 of the righting frame is corresponding to an insert block 102.8 at the bottom end of a stand column 102.1, a first locking hole 202.5 of the righting frame is arranged at the center of the front side surface of the rectangular boss 202.2 of the righting frame, two first positioning holes 202.6 of the righting frame which are symmetrically arranged at the front side surface of the rectangular boss 202.2 of the righting frame are also arranged at the same diagonal angle of the boss 202.5 of the lower die, a second locking hole 202.7 of the lower die of the righting frame and a second positioning hole 202.8 of the lower die of the righting frame are respectively formed on the top surface of the rectangular boss 202.2 of the lower die of the righting frame corresponding to the locking hole 201.7 of the upper die of the righting frame and the positioning column 201.8 of the upper die of the righting frame, and the positioning column 201.8 of the upper die of the righting frame is inserted into the second positioning hole 202.8 of the lower die of the righting frame;

the rear side surface of the rectangular boss 202.2 of the lower centering frame is provided with a third locking hole 202.9 of the lower centering frame and two third positioning holes 202.10 of the lower centering frame which are arranged in central symmetry, the third locking hole 202.9 of the lower centering frame is positioned in the center of the upper section of the rear side surface of the rectangular boss 202.2 of the lower centering frame, and the third positioning holes 202.10 of the two lower centering frame are positioned on the same diagonal line of the rear side surface of the rectangular boss 202.2 of the lower centering frame.

The front mould 203 of the righting frame comprises a vertical front mould bottom plate 203.1 of the righting frame, the middle section and the lower section of the rear side surface of the front mould bottom plate 203.1 of the righting frame are provided with a left vertical semicircular groove 203.2 and a right vertical semicircular groove 203.2 of the righting frame, the two semicircular grooves 203.2 of the front mould of the righting frame are respectively combined with two semicircular grooves 202.3 of the lower mould of the righting frame 202 to form two upright post grooves of the righting frame, the two upright post grooves of the righting frame correspond to two upright posts 102.1 of the righting frame 102, a front mould bottom plate 203.1 of the righting frame at the top of the semicircular groove 203.2 of the righting frame front mould is provided with a front mould groove 203.3 of the righting frame, the two front mould grooves 203.3 of the righting frame are arranged symmetrically left and right, the inner side surface of the mould groove 203.3 in front of the righting frame is provided with a corner forming surface corresponding to the corner of the upper cover plate 102.3 in front of the lacing wire 102.6 of the righting frame, the center of the bottom plate 203.1 of the front mould of the righting frame is provided with a locking hole 203.4 of the front mould of the righting frame.

The rear mold 204 of the centering frame comprises a vertical rear mold base plate 204.1 of the centering frame, a vertical rear mold rectangular groove 204.2 of the centering frame is formed in the middle section of the front side surface of the rear mold base plate 204.1 of the centering frame, a prismatic lug 204.3 of the centering frame is arranged on the upper section of the rectangular groove 204.2 of the centering frame, the prismatic lug 204.3 of the centering frame corresponds to a prismatic hole 102.7 in the vertical plate 102.2, a centering frame rear mold locking hole 204.4 penetrating through the center of the prismatic lug 204.3 of the centering frame is formed in the middle section of the rear mold base plate 204.1 of the centering frame, a centering frame rear mold positioning column 204.5 is arranged on each of the left section and the right section of the centering frame rear mold base plate 204.1 of the centering frame, the two centering frame rear mold positioning columns 204.5 correspond to the third positioning holes 202.10 of the two lower molds, and the positioning columns 204.5 of the centering frame are inserted into the third positioning holes 202.10 of the lower mold.

Placing a front centering frame die 203 on the front section of a lower centering frame die 202, placing a rear centering frame die 204 on the rear section of the lower centering frame die 202, placing a rectangular boss 202.2 of the lower centering frame die between the front centering frame die 203 and the rear centering frame die 204, placing an upper centering frame die 201 on the front centering frame die 203, the rectangular boss 202.2 of the lower centering frame die and the rear centering frame die 204, and respectively sequentially passing two first centering frame locking nuts 205 through a locking hole 201.7 of the upper centering frame die and a second locking hole 202.7 of the lower centering frame die so as to lock the upper centering frame die 201 and the lower centering frame die 202; the second centering frame locking nut 206 sequentially penetrates through the centering frame front mold locking hole 203.4 and the centering frame lower mold first locking hole 202.5, so that the centering frame front mold 203 and the centering frame lower mold 202 are locked; the back centralizing frame die 204 and the lower centralizing frame die 202 are locked by passing a third centralizing frame lock nut 207 through the back centralizing frame die lock hole 204.4 and the lower centralizing frame die third lock hole 202.9 in sequence.

Referring to fig. 12 to 25, the base 101 is made of a mold made of a base mold 300, the base mold 300 is placed upside down during the manufacturing process, and the base mold 300 includes a base upper mold 301, a base lower mold 302, a base front middle mold 303, a base rear middle mold 304, two base front side molds 305, a base left rear side mold 306, a base right rear side mold 307, four base locking assemblies 308, and a plurality of base positioning pins 309.

The center of the base 101 is provided with a slip body mounting hole 101.1, a slip body 103 is arranged in the slip body mounting hole 101.1, the top of the slip body mounting hole 101.1 is provided with a slip body mounting hole inclined surface 101.2 inclined to the center, the middle section of the slip body mounting hole 101.1 is provided with a slip body mounting hole conical surface 101.3 with a gradually reduced diameter, a valve notch 101.4 is arranged right ahead of the slip body mounting hole 101.1, the top surfaces of the base 101 at the left and right sides of the valve notch 101.4 rear section are provided with vertical insert block holes 101.5 for mounting an insert block 102.8 of a centering frame 102, a base tie bar 101.6 is connected between the tops of the left and right inner side surfaces of the valve notch 101.4 front section, the left and right sides of the base 101 middle section are provided with a front mounting lug 101.7 and a rear mounting lug 101.8, the top and the bottom of the base 101 rear section are respectively provided with a base upper mounting plate 101.9 and a base lower mounting plate 101.10 backwards, and the left section of the base lower mounting plate 101.10 is provided with a fixed seat 101.11, the left and right sides of the bottom of base 101 outwards extends respectively has base left mounting panel 101.12 and base right mounting panel 101.13, and the middle part of base left mounting panel 101.12 and base right mounting panel 101.13 all is provided with horizontal waist type hole.

The base upper die 301 comprises a base upper die bottom plate 301.1, the middle part of the bottom surface of the base upper die bottom plate 301.1 is provided with a base upper die forming groove 301.13 corresponding to the top surface profile of the base 101, the rear section of the base upper die forming groove 301.13 corresponds to the base upper mounting plate 101.9, the left side and the right side of the middle section of the base upper die forming groove 301.13 are respectively provided with a base upper die first groove 301.5 and a base upper die second groove 301.6, the inner top surfaces of the base upper die first groove 301.5 and the base upper die second groove 301.6 are set to be curved surfaces, the base upper die first curved surface movable block 301.7 and the base upper die second curved surface movable block 301.8 are respectively arranged in the base upper die first groove 301.5 and the base upper die second groove 301.6 and are symmetrically arranged front and back, the base upper die first groove 301.5 and the base upper die first movable block 301.7 correspond to the front mounting lug section of the base 101.7, the second groove 301.6 of the upper die of the base and the second curved surface movable block 301.8 of the upper die of the base correspond to the upper section of the rear mounting lug 101.8 of the base 101, the upper die boss 301.2 of the base is arranged in the middle section of the upper die forming groove 301.13 of the base, the upper die boss 301.2 of the base sequentially comprises an inclined plane section of the upper die of the base and a conical section of the upper die of the base from top to bottom, the inclined plane section of the upper die of the base corresponds to the inclined plane 101.2 of the mounting hole of the slip body, the conical section of the upper die of the base corresponds to the conical plane 101.3 of the mounting hole of the slip body, the trapezoidal boss 301.3 of the upper die of the base is arranged right in front of the boss 301.2 of the upper die of the base, the trapezoidal boss 301.3 of the upper die of the base corresponds to the upper section and the middle section of the gap 101.4 of the valve, the trapezoidal boss 301.3 of the upper die of the base is connected with the boss 301.2 of the upper die of the base, the rectangular boss of the upper, the left side and the right side of the trapezoidal boss 301.3 of the upper die of the base are provided with an upper die circular lug 301.9 of the base, and the upper die circular lug 301.9 of the base corresponds to the insert block hole 101.5 of the base 101;

mould boss 301.2 on the base and the trapezoidal boss of mould 301.3's on the base bottom surface all are provided with mould reference column 301.10 on the base, mould bottom plate 301.1's on the base left and right sides all is provided with around two vertical bases mould locking hole 301.11, mould bottom plate 301.1's around the base both sides all are provided with about two fore-and-aft bases on mould fixed pin hole 301.14, mould fixed pin hole 301.14 is linked together with mould locking hole 301.11 on the base, mould profiled groove 301.13's on the base outside is provided with mould bolt hole 301.12 on a plurality of bases.

The base lower die 302 comprises a base lower die bottom plate 302.1, the middle part of the top surface of the base lower die bottom plate 302.1 is provided with a base lower die forming groove 302.2 corresponding to the bottom surface outline of the base 101, the rear section of the base lower die forming groove 302.2 corresponds to the base lower mounting plate 101.10, the left section and the right section of the base lower die forming groove 302.2 respectively correspond to the base left mounting plate 101.12 and the base right mounting plate 101.13, the middle section and the middle part of the front section of the base lower die forming groove 302.2 are provided with a base lower die boss 302.3, the base lower die boss 302.3 comprises a big semicircular section and a rectangular section from back to front, the big semicircular section of the base lower die boss 302.3 corresponds to the inner side surface at the bottom of the slip body mounting hole 101.1, the rectangular section of the base lower die boss 302.3 corresponds to the lower section of the valve notch 101.4, the left side and the right side of the big semicircular section of the base lower die boss 302.3 are provided with a base lower die circular boss 302., the two lower base mould waist-shaped round bumps 302.5 are respectively corresponding to waist-shaped holes on the left base mounting plate 101.12 and the right base mounting plate 101.13;

the top surface of base lower mould boss 302.3 is provided with base lower mould locating hole 302.4 corresponding with base upper mould reference column 301.10, the left and right sides of base lower mould bottom plate 302.1 all is provided with two vertical base lower mould locking holes 302.6 around, the outside of base lower mould shaping groove 302.2 is provided with a plurality of base lower mould bolt holes 302.7.

Middle mould 303.1 before the base includes middle mould bottom plate 303.1 before the base, middle mould bottom plate 303.1's trailing flank before the base is provided with cross middle mould boss 303.2 before the base, middle mould boss 303.2's top and bottom extend to the top and the bottom of middle mould bottom plate 303.1 before the base respectively before the base, middle mould boss 303.2's left end and right-hand member extend to middle mould bottom plate 303.1's left end and right-hand member before the base respectively before the base, middle mould boss 303.2's middle section is provided with about two vertical middle mould bolt holes 303.3 before the base.

Middle mould 304 behind the base includes middle mould bottom plate 304.1 behind the base, the middle section of middle mould bottom plate 304.1's leading flank behind the base is provided with middle mould rectangle boss 304.2 behind the base, and the middle section of middle mould rectangle boss 304.2's leading flank behind the base is provided with the trapezoidal section of middle mould 304.3 behind the base, and the top surface and the bottom surface of the trapezoidal section of middle mould 304.3 behind the base set up to the inclined plane of symmetrical arrangement, middle mould bottom plate 304.1's left side section and right side section all are provided with middle mould bolt hole 304.4 behind the vertical base behind the base.

The base front side die 305 comprises a base front side die bottom plate 305.1, a base front side die first rectangular boss 305.2 and a base front side die second rectangular boss 305.3 are respectively arranged at the front section and the rear section of the inner side surface of the base front side die bottom plate 305.1, a vertical base front side die first curved surface section 305.4 is arranged at the inner side surface of the base front side die bottom plate 305.1 between the base front side die first rectangular boss 305.2 and the base front side die second rectangular boss 305.3, a vertical base front side die second curved surface section 305.5 is arranged at the inner side surface of the base front side die bottom plate 305.1 at the rear side of the base front side die second rectangular boss 305.3, and the base front side die first curved surface section 305.4 and the base front side die second curved surface section 305.5 respectively correspond to the middle sections and the lower sections of the front mounting lugs 101.7 and the rear mounting lugs 101.8;

the front section of the outer side surface of the base front side die bottom plate 305.1 is provided with a vertical base front side die locking hole 305.6, and the base front side die bottom plate 305.1 is provided with a front vertical base front side die bolt hole 305.7 and a rear vertical base front side die bolt hole 305.7.

The base left back side mould 306 comprises a base left back side mould bottom plate 306.1, the front section and the back section of the inner side of the base left back side mould bottom plate 306.1 are respectively provided with a base left back side mould first rectangular boss 306.2 and a base left back side mould second rectangular boss 306.3, the front section of the inner side of the base left back side mould first rectangular boss 306.2 is arranged to be an inward arc-shaped surface of a concave surface, the lower section of the base left back side mould second rectangular boss 306.3 is provided with a base left back side mould rectangular groove 306.4, the base left back side mould rectangular groove 306.4 is corresponding to an installation block upwards arranged at the left back section of the base lower installation plate 101.10, the base left back side mould first rectangular boss 306.2 and the base left back side mould bottom plate 306.1 between the base left back side mould second rectangular bosses 306.3 are provided with a base left back side mould first convex section 306.5, the base left back mould first convex section 306.5 sequentially comprises a large rectangular section from top to bottom, A first arc section 306.8 of the left rear side die of the base with a downward concave surface is arranged between the front side of the bottom of the large rectangular section at the front side and the rear side of the small rectangular section and the inner side of the bottom plate 306.1 of the left rear side die of the base;

a base left rear side die movable block 306.6 is arranged between the base left rear side die first rectangular boss 306.2 and the base left rear side die second rectangular boss 306.3, a base left rear side die second convex section 306.7 is arranged at the position of the outer side surface of the base left rear side die movable block 306.6 corresponding to the base left rear side die first convex section 306.5, the structure of the base left rear side die second convex section 306.7 is the same as that of the base left rear side die first convex section 306.5, a base left rear side die second arc section 306.9 with a downward concave surface is arranged between the bottom of the large rectangular section at the front side and the rear side of the small rectangular section in the base left rear side die second convex section 306.7 and the inner side surface of the base left rear side die bottom plate 306.1, and the base left rear side die first convex section 306.5, the base left rear side die first arc section 306.8, the base left rear side die second convex section 306.7 and the base left rear side die second arc section 306.9 correspond to the cylinder fixing seat 101.11;

the back end of the lateral surface of the base left back side die bottom plate 306.1 is provided with a vertical base left back side die locking hole 306.10, the middle section and the back end of the top surface of the base left back side die bottom plate 306.1 are provided with a vertical base left back side die bolt hole 306.11.

A base right rear side die rectangular boss 307.1 is arranged at the front section of the inner side surface of the base right rear side die 307, a base right rear side die cambered surface section 307.2 with an inward concave surface is arranged between the front side of the inner side surface of the base right rear side die rectangular boss 307.1 and the front side of the inner side surface of the base right rear side die 307, a base right rear side die first rectangular groove 307.3 and a base right rear side die second rectangular groove 307.4 which are symmetrically arranged up and down are arranged at the rear section of the base right rear side die 307, and the base right rear side die first rectangular groove 307.3 and the base right rear side die second rectangular groove 307.4 are respectively corresponding to a mounting block arranged downwards at the right rear section of a base upper mounting plate 101.9 and a mounting block arranged upwards at the right rear section of a base lower mounting plate 101.10;

the rear section of the lateral surface of the base right rear side mold 307 is provided with a vertical base right rear side mold locking hole 307.5, and the middle section and the rear section of the top surface of the base right rear side mold 307 are provided with a vertical base right rear side mold bolt hole 307.6.

The base locking assembly 308 comprises a base locking nut ring 308.1, a base locking screw 308.2 and a base fixing pin 308.3, a base front middle die 303 and a base rear middle die 304 are respectively placed on the front middle section and the rear middle section of the base upper die 301, two base front side dies 305 are respectively placed on the left front section and the right front section of the base upper die 301, a base left rear side die 306 and a base right rear side die 307 are respectively placed on the left rear section and the right rear section of the base upper die 301, and a base lower die 302 is placed above the base front middle die 303, the base rear middle die 304, the two base front side dies 305, the base left rear side die 306 and the base right rear side die 307; set up a plurality of base location bolt 309 in the bolt hole of a plurality of moulds of same vertical respectively, set up four base locking screw 308.2 in the locking hole of a plurality of moulds of same vertical respectively, base fixed pin 308.3 sets up in mould fixed pin hole 301.14 on the base, and passes base locking screw 308.2's bottom, tightens up base locking screw 308.2 through base lock nut ring 308.1 to lock a plurality of moulds.

A production method of a C-shaped air chuck comprises the following steps: firstly, a chuck main body model is manufactured through a chuck main body die, wherein a righting frame and a base are respectively manufactured through models manufactured through the righting frame die and the base die; the base model of making through the base mould, with the base lacing wire excision in the base model to carry out the finish machining to it, can obtain the finished product base, with the assembly of pegging graft of finished product centralizing frame and finished product base, can obtain the chuck main part, install the dental lamina and the power unit that the slips body, made by the dental lamina production line at last on the chuck main part.

Referring to fig. 26 to 35, the dental plate 104 includes a circular arc-shaped dental plate body 104.1 and a plurality of dental plate teeth 104.2, the plurality of dental plate teeth 104.2 are uniformly disposed on a concave surface of the dental plate body 104.1 along a length direction of the dental plate body 104.1, an upper section and a lower section of each dental plate tooth 104.2 are provided with an anti-collapse groove 104.4, a middle portion of a convex surface of the dental plate body 104.1 along the length direction thereof is provided with a positioning pin embedding groove 104.3, and one side along a radian direction of the dental plate body 104.1 is provided with a positioning strip 104.5.

The production process of the dental plate 104 is as follows:

the main production process comprises the following steps: blanking round steel, drilling, rough turning, finish turning, milling a locating pin embedding groove, sawing, milling an inclined plane, gear shaping, deburring, marking and carburizing quenching, and specifically comprises the following operations:

step one, round steel blanking

Sawing off a round steel blank with the diameter of phi 120mm by adopting a belt sawing machine according to the standard requirement of the length of 178 mm;

step two, drilling

Clamping and fixing the round steel blank by using a three-jaw chuck of a Z3080 radial drilling machine, and drilling a through hole with the diameter phi of 60mm in the center of the round steel blank;

step three, rough turning

Clamping and fixing the round steel blank by using a three-jaw chuck of a C6140 common lathe, so as to perform rough turning inner and outer circle single-side operation on the round steel blank, and reserving 1mm of machining allowance;

step four, finish turning

Clamping and fixing the round steel blank by using a three-jaw chuck of a numerical control machine tool, and performing finish turning operation on the round steel blank, namely inner and outer circles and tooth plate teeth;

step five, milling the embedding groove of the positioning pin

Correcting and pressing the milling positioning pin embedding groove tool by adopting a horizontal milling machine, and pressing and fixing the round steel blank by the milling positioning pin embedding groove tool so as to perform excircle positioning pin embedding groove milling operation on the round steel blank;

step six, saw cutting

Correcting and pressing a sawing tool by using a sawing machine, and positioning and pressing a round steel blank by using the sawing tool so as to saw cut the round steel blank into four equal parts of arc steel along the length direction of the round steel blank;

step seven, milling the inclined plane

Correcting and pressing the slope milling tool by adopting a vertical milling machine, and positioning and pressing the arc steel by the slope milling tool so as to mill slopes on two sides of the arc steel in the length direction, wherein the machining amount is 3.5 mm;

step eight, gear shaping

Correcting and pressing the gear shaping tool by adopting a planer, positioning and pressing the arc steel by the gear shaping tool, so as to carry out gear shaping operation on the concave surface of the arc steel and plane an anti-collapse groove;

ninth step, deburring

Grinding burrs generated by machining by using a portable grinding wheel;

step ten, marking

Printing corresponding marks by using a low-stress steel seal;

step eleven, carburizing and quenching

The surface of the tooth plate is carburized to 0.8-1mm depth, and the surface hardness of the tooth plate after heat treatment reaches HRC58-62, thus obtaining the finished tooth plate.

Preferably, the tooling for milling the embedded groove of the locating pin in the fifth step comprises a tooling core rod 401 for milling the embedded groove of the locating pin, a tooling cover plate 402 for milling the embedded groove of the locating pin and a tooling nut 403 for milling the embedded groove of the locating pin, wherein one end of the tooling core rod 401 for milling the embedded groove of the locating pin is provided with a tooling cover cap 404 for milling the embedded groove of the locating pin, the outer surface of the other end is provided with threads, the tooling core rod 401 for milling the embedded groove of the locating pin is arranged in the through hole of the first semi-finished product 800 processed in the fourth step, the outer surface of the tooling core rod 401 for milling the embedded groove of the locating pin is provided with a threaded end which extends out of the through hole of the first semi-finished product 800 processed in the fourth step, the tooling cover plate 402 for milling the embedded groove of the locating pin is sleeved on the outer section of the tooling core rod 401 for milling the locating pin and is contacted with the other, and the milling positioning pin embedding groove tool nut 403 is in threaded connection with the milling positioning pin embedding groove tool core rod 401 outside the milling positioning pin embedding groove tool cover plate 402, so that the first semi-finished product 800 processed in the fourth step is fixed between the milling positioning pin embedding groove tool cover plate 402 and the milling positioning pin embedding groove tool nut cap 404.

Preferably, the sawing tool in the sixth step comprises a sawing tool base 701, a sawing tool cambered surface 702 with an upward concave surface is arranged at the front upper section of the sawing tool base 701 along the length direction of the sawing tool base, the sawing tool cambered surface 702 is consistent with the radian of the convex surface of the second semi-finished product 1100 processed in the fifth step, a transverse sawing tool positioning pin groove 703 is arranged at the middle section of the sawing tool cambered surface 702, a sawing tool positioning pin is arranged in the sawing tool positioning pin groove 703, sawing tool threaded holes 704 are arranged at the left side and the right side of the sawing tool positioning pin groove 703, a sawing tool bolt is arranged in the sawing tool threaded hole 704, and a sawing tool pressing plate is arranged between the sawing tool bolt and the sawing tool cambered surface;

and (4) placing the second semi-finished product 1100 processed in the fifth step on the sawing tool cambered surface 702, so that the upper section of the locating pin of the sawing tool is embedded in the locating pin embedding groove on the convex surface of the second semi-finished product 1100 processed in the fifth step, and pressing and fixing the second semi-finished product 1100 processed in the fifth step on the sawing tool base 701 through the sawing tool pressing plate.

Preferably, the bevel milling tool in the seventh step comprises a bevel milling tool base 507, a bevel milling tool base 501 is arranged upwards at the middle section of the bevel milling tool base 507, a bevel milling tool arc surface 502 with a concave surface facing upwards is arranged at the front upper section of the bevel milling tool base 501 along the length direction of the bevel milling tool base, the bevel milling tool arc surface 502 is consistent with the convex surface radian of the third semi-finished product 900 processed in the sixth step, a transverse bevel milling tool positioning pin groove 503 is arranged at the middle section of the bevel milling tool arc surface 502, a bevel milling tool positioning pin is arranged in the bevel milling tool positioning pin groove 503, first bevel milling tool threaded holes 504 are arranged at the left side and the right side of the bevel milling tool positioning pin groove 503, two second bevel milling tool threaded holes 505 at the left side and the right side are arranged at the front lower side of the lower section of the bevel milling tool base 501, the two bevel tool threaded holes 505 are positioned in front of the bevel milling tool positioning pin groove 503, a first milling inclined plane tool bolt is arranged in the first milling inclined plane tool threaded hole 504, a second milling inclined plane tool bolt 506 is arranged in the second milling inclined plane tool threaded hole 505, and milling inclined plane tool pressing plates are arranged between the first milling inclined plane tool bolt, the milling inclined plane tool arc surface 502, the second milling inclined plane tool bolt 506 and the milling inclined plane tool base 501;

the third semi-finished product 900 processed in the sixth step is placed on the arc surface 502 of the slope milling tool, so that the upper half section of the locating pin of the slope milling tool is embedded in the locating pin embedding groove on the convex surface of the arc steel processed in the sixth step, and the third semi-finished product 900 processed in the sixth step is pressed and fixed on the slope milling tool base 501 through the slope milling tool pressing plate.

Preferably, the gear shaping tool in the step eight comprises a gear shaping tool base 601, the gear shaping tool base 601 sequentially comprises a gear shaping tool base rectangular section and a gear shaping tool base trapezoidal section from bottom to top, a gear shaping tool cambered surface 602 with a concave surface facing upwards is arranged at the top of the gear shaping tool base 601 along the length direction of the gear shaping tool base, the radian of the convex surface of the gear shaping tool cambered surface 602 is consistent with that of the convex surface of the fourth semi-finished product 1000 processed in the step seven, a transverse gear shaping tool positioning pin slot 603 is arranged in the middle section of the gear shaping tool cambered surface 602, a gear shaping tool positioning pin is arranged in the gear shaping tool positioning pin slot 603, a left gear shaping tool first threaded hole 604 and a right gear shaping tool first threaded hole 604 are arranged at the upper sections of the gear shaping tool base 601 at the front side and the rear side of the gear shaping tool cambered surface 602, a gear shaping tool second threaded hole 606 is arranged at the left side and the right side of the gear shaping tool base 601 below the gear shaping tool cambered surface 602, a gear shaping tool second bolt is arranged in the gear shaping tool second threaded hole 606, and gear shaping tool pressing plates are arranged between the gear shaping tool first bolt 605 and the gear shaping tool base 601 and between the gear shaping tool second bolt and the gear shaping tool base 601;

placing the fourth semi-finished product 1000 processed in the seventh step on the gear shaping tool cambered surface 602, embedding the upper section of the positioning pin of the gear shaping tool in the positioning pin embedding groove on the convex surface of the fourth semi-finished product 1000 processed in the seventh step, and pressing and fixing the fourth semi-finished product 1000 processed in the seventh step on the gear shaping tool base 601 through the gear shaping tool pressing plate.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims (6)

1. A chuck body, characterized in that: the lifting device comprises a base and a centering frame, wherein the centering frame is arranged at the top of the base and consists of two stand columns, a vertical plate and an upper cover plate, the upper cover plate is connected to the tops of the two stand columns and the vertical plate, a circular inserting block is arranged at the bottom end of each stand column downwards, two inserting block holes are formed in the top surface of the base, and the two circular inserting blocks are respectively inserted into the inserting block holes.

2. A chuck body according to claim 1, further comprising: the two stand columns are respectively erected on the top surface of the left front section and the top surface of the right front section of the base, the vertical plate is erected in the middle of the rear section of the base, a prismatic hole is formed in the upper section of the vertical plate, a stopping block bolt jack is arranged on the rear side face of the lower section of the vertical plate, a stopping block is fixed in the stopping block bolt jack, a correcting hole is formed in the middle section of the upper cover plate, the upper section of the correcting hole is set to be a correcting hole inclined plane in an inclined center, a correcting frame notch is formed in the upper cover plate in front of the correcting hole and communicated with the correcting hole, and a correcting frame pull rib is connected between the upper cover plates on the left side and the right side of the corresponding correcting frame notch.

3. A chuck body according to claim 1, further comprising: the central part of the base is provided with a slip body mounting hole, the slip body is arranged in the slip body mounting hole, the top part of the slip body mounting hole is provided with a slip body mounting hole inclined plane inclined towards the central part, the middle section of the slip body mounting hole is provided with a slip body mounting hole conical surface with gradually reduced diameter, a valve gap is arranged right ahead of the slip body mounting hole, the top surfaces of the bases at the left side and the right side of the rear section of the valve gap are provided with vertical insert block holes, a base lacing wire is connected between the tops of the left inner side surface and the right inner side surface of the front section of the valve gap, the left side and the right side of the middle section of the base are both provided with a front mounting lug and a rear mounting lug, the top part and the bottom part of the rear section of the base are respectively provided with a base upper mounting plate and a base lower mounting plate backwards, the left section of the base lower mounting plate is provided with a cylinder fixing, the middle parts of the left base mounting plate and the right base mounting plate are provided with transverse waist-shaped holes.

4. A chuck body according to claim 1, further comprising: the chuck body is made of a model made of a chuck body mold, the chuck body mold comprises a centering frame mold and a base mold, the centering frame is made of a model made of a centering frame mold, and the centering frame mold comprises a centering frame upper mold, a centering frame lower mold, a centering frame front mold, a centering frame rear mold, two first centering frame locking nuts, a second centering frame locking nut and a third centering frame locking nut; the base is made by the model that the base mould was made, the base mould includes mould, base bed die, base front middle mould, base back middle mould, two base front side moulds, base left side back side mould, base right side back side mould, four base locking Assembly and a plurality of base location bolts before the base mould includes base upper die, base bed die, base.

5. A chuck body according to claim 4 wherein: the upper die of the centering frame comprises an upper die bottom plate of the centering frame, a first trapezoidal block of the upper die of the centering frame, a boss of the upper die of the centering frame and a second trapezoidal block of the upper die of the centering frame are arranged at the middle section of the bottom surface of the upper die bottom plate of the centering frame, the boss of the upper die of the centering frame is positioned at the center of the upper die bottom plate of the centering frame, the boss of the upper die of the centering frame sequentially comprises a conical section and a circular section with gradually reduced diameters from top to bottom, the outer side surface of the conical section of the boss of the upper die of the centering frame corresponds to the inclined plane of a centering hole, the first trapezoidal block of the upper die of the centering frame and the second trapezoidal block of the upper die of the centering frame are respectively positioned at the left side and the right side of the boss of the upper die of the centering frame, the rear section and the middle section of the inner side surfaces of the first trapezoidal block of the upper die of the centering frame and the second trapezoidal block of the upper die of the centering frame are arranged as circular arc surfaces with inward concave surfaces, the right front side of the boss of the upper die of the righting frame is provided with a trapezoidal boss of the upper die of the righting frame, the trapezoidal boss of the upper die of the righting frame is connected with the boss of the upper die of the righting frame, and the top of the front section of the trapezoidal boss of the upper die of the righting frame is provided with a rectangular groove of the upper die of the righting frame along the length direction;

the left section and the right section of the bottom plate of the mould on the righting frame are provided with mould locking holes on the righting frame, the mould locking holes on the two righting frames respectively penetrate through the rear section of the first trapezoidal block of the mould on the righting frame and the front section of the second trapezoidal block of the mould on the righting frame, the mould locking holes on the two righting frames are arranged in a central symmetry manner, the bottom surfaces of the front section of the first trapezoidal block of the mould on the righting frame and the rear section of the second trapezoidal block of the mould on the righting frame are both provided with mould positioning columns on the righting frame, and the mould positioning columns on the two righting frames are arranged in a central symmetry manner;

the lower die of the centering frame comprises a lower die bottom plate of the centering frame, a rectangular boss of the lower die of the centering frame is arranged at the middle section of the top surface of the lower die bottom plate of the centering frame, a semicircular groove of the lower die of the centering frame is vertically arranged at the left section and the right section of the front side surface of the rectangular boss of the lower die of the centering frame, a counter bore of the lower die of the centering frame is arranged at the bottom of the semicircular groove of the lower die of the centering frame, the counter bore of the lower die of the centering frame corresponds to an insert block at the bottom end of a stand column, a first locking hole of the lower die of the centering frame is arranged at the center of the front side surface of the rectangular boss of the centering frame, two first positioning holes of the lower die of the centering frame and the first locking hole of the lower die of the centering frame are arranged on the same diagonal line of the front side surface of the rectangular boss of the lower die of the centering frame, a second locking hole of the lower die of the righting frame and a second positioning hole of the lower die of the righting frame are formed in the top surface of the rectangular boss of the lower die of the righting frame;

the rear side surface of the rectangular boss of the lower die of the centering frame is provided with a third locking hole of the lower die of the centering frame and two third positioning holes of the lower die of the centering frame, which are arranged in central symmetry, the third locking hole of the lower die of the centering frame is positioned in the center of the upper section of the rear side surface of the rectangular boss of the lower die of the centering frame, and the third positioning holes of the lower die of the two centering frames are positioned on the same diagonal line of the rear side surface of the rectangular boss of the lower die of the centering frame;

the centering frame front mold comprises a vertical centering frame front mold bottom plate, a left vertical centering frame front mold semicircular groove and a right vertical centering frame front mold semicircular groove are arranged at the middle section and the lower section of the rear side surface of the centering frame front mold bottom plate, a centering frame front mold groove is arranged on the centering frame front mold bottom plate at the top of the centering frame front mold semicircular groove, the two centering frame front mold grooves are arranged in a bilateral symmetry manner, a corner forming surface corresponding to the corner of the front side of the upper cover plate is arranged on the inner side surface of the centering frame front mold groove, and a centering frame front mold locking hole is formed in the center of the centering frame front mold bottom plate;

the mold comprises a vertical centering frame rear mold base plate, a vertical centering frame rear mold rectangular groove is formed in the middle section of the front side face of the centering frame rear mold base plate, a centering frame rear mold prismatic convex block is arranged at the upper section of the centering frame rear mold rectangular groove, a centering frame rear mold locking hole penetrating through the center of the centering frame rear mold prismatic convex block is formed in the middle section of the centering frame rear mold base plate, and centering frame rear mold positioning columns are arranged at the left section and the right section of the centering frame rear mold base plate.

6. A chuck body according to claim 4 wherein: the upper base mould comprises an upper base mould bottom plate, the middle part of the bottom surface of the upper base mould bottom plate is provided with an upper base mould forming groove corresponding to the outline of the top surface of the base, the rear section of the upper base mould forming groove corresponds to the upper base mounting plate, the left side and the right side of the middle section of the upper base mould forming groove are respectively provided with an upper base mould first groove and an upper base mould second groove, the inner top surfaces of the upper base mould first groove and the upper base mould second groove are set to be curved surfaces, an upper base mould first curved surface movable block and an upper base mould second curved surface movable block are respectively arranged in the upper base mould first groove and the upper base mould second groove, the upper base mould first curved surface movable block and the upper base mould second curved surface movable block are symmetrically arranged in the front-back direction, an upper base mould boss is arranged in the middle section of the upper base mould forming groove, the upper base mould boss sequentially comprises an upper base mould inclined plane section and an upper base, the base upper die inclined plane section corresponds to the inclined plane of the slip body mounting hole, the base upper die conical section corresponds to the slip body mounting hole conical surface, the front side of the base upper die boss is provided with the base upper die trapezoidal boss, the base upper die trapezoidal boss is connected with the base upper die boss, the front side of the base upper die trapezoidal boss lower section is provided with a transverse base upper die rectangular strip, the left side and the right side of the base upper die trapezoidal boss are provided with base upper die circular lugs, and the base upper die circular lugs correspond to the plug-in block holes of the base;

the base upper die boss and the base upper die trapezoidal boss are provided with base upper die positioning columns on the bottom surfaces, the left side and the right side of the base upper die base plate are provided with a front vertical base upper die locking hole and a rear vertical base upper die locking hole respectively, the front side and the rear side of the base upper die base plate are provided with a left vertical base upper die fixing pin hole and a right vertical base upper die fixing pin hole respectively, the base upper die fixing pin holes are communicated with the base upper die locking holes, and a plurality of base upper die pin holes are formed in the outer side of the base upper die forming groove;

the base lower die comprises a base lower die bottom plate, a base lower die forming groove corresponding to the outline of the bottom surface of a base is arranged in the middle of the top surface of the base lower die bottom plate, base lower die bosses are arranged in the middle of the middle section and the front section of the base lower die forming groove, each base lower die boss comprises a large semicircular section and a rectangular section from back to front, and base lower die waist-shaped circular convex blocks are arranged on the left side and the right side of the large semicircular section of each base lower die boss;

the top surface of the boss of the lower base die is provided with a lower base die positioning hole, the left side and the right side of the bottom plate of the lower base die are respectively provided with a front vertical lower base die locking hole and a rear vertical lower base die locking hole, and the outer side of the lower base die forming groove is provided with a plurality of lower base die bolt holes;

the middle die before the base comprises a middle die bottom plate before the base, the back side surface of the middle die bottom plate before the base is provided with a cross-shaped middle die boss before the base, the top end and the bottom end of the middle die boss before the base are respectively extended to the top end and the bottom end of the middle die bottom plate before the base, the left end and the right end of the middle die boss before the base are respectively extended to the left end and the right end of the middle die bottom plate before the base, and the middle section of the middle die boss before the base is provided with a left vertical middle die pin hole and a right vertical middle die pin hole before the;

the rear middle die of the base comprises a rear middle die base plate of the base, a rectangular boss of the rear middle die of the base is arranged at the middle section of the front side surface of the rear middle die base plate of the base, a trapezoidal section of the rear middle die of the base is arranged at the middle section of the front side surface of the rectangular boss of the rear middle die of the base, the top surface and the bottom surface of the trapezoidal section of the rear middle die of the base are symmetrically arranged inclined planes, and vertical rear middle die plug pin holes are formed in the left section and the right section of the rear middle die base plate of the base;

the base front side die comprises a base front side die bottom plate, a base front side die first rectangular boss and a base front side die second rectangular boss are respectively arranged at the front section and the rear section of the inner side surface of the base front side die bottom plate, a vertical base front side die first curved surface section is arranged at the inner side surface of the base front side die bottom plate between the base front side die first rectangular boss and the base front side die second rectangular boss, and a vertical base front side die second curved surface section is arranged at the inner side surface of the base front side die bottom plate at the rear side of the base front side die second rectangular boss;

the front section of the outer side surface of the base front side die bottom plate is provided with a vertical base front side die locking hole, and the base front side die bottom plate is provided with a front vertical base front side die bolt hole and a rear vertical base front side die bolt hole;

the base left back side die comprises a base left back side die bottom plate, the front section and the back section of the inner side surface of the base left back side die bottom plate are respectively provided with a base left back side die first rectangular boss and a base left back side die second rectangular boss, the front section of the inner side surface of the base left back side die first rectangular boss is arranged to be an arc-shaped surface with an inward concave surface, a base left rear side die rectangular groove is formed in the lower section of the base left rear side die second rectangular boss, a base left rear side die first convex section is arranged on the inner side face of a base left rear side die bottom plate between the base left rear side die first rectangular boss and the base left rear side die second rectangular boss, the base left rear side die first convex section sequentially comprises a large rectangular section, a small rectangular section and a semicircular section from top to bottom, and a base left rear side die first circular arc section with a downward concave surface is arranged between the front side of the bottom of the large rectangular section on the front side and the rear side of the small rectangular section and the inner side face of the base left rear side die bottom plate;

a base left rear side die movable block is further arranged between the base left rear side die first rectangular boss and the base left rear side die second rectangular boss, a base left rear side die second convex section is arranged on the outer side surface of the base left rear side die movable block corresponding to the base left rear side die first convex section, the base left rear side die second convex section is the same as the base left rear side die first convex section in structure, and a base left rear side die second circular arc section with a downward concave surface is arranged between the bottom of a large rectangular section on the front side and the rear side of a small rectangular section in the base left rear side die second convex section and the inner side of a base left rear side die bottom plate;

the rear section of the outer side surface of the base left rear side die bottom plate is provided with a vertical base left rear side die locking hole, and the middle section and the rear section of the top surface of the base left rear side die bottom plate are provided with vertical base left rear side die bolt holes;

a base right rear side die rectangular boss is arranged at the front section of the inner side surface of the base right rear side die, a base right rear side die cambered surface section with an inward concave surface is arranged between the front side of the inner side surface of the base right rear side die rectangular boss and the front side of the inner side surface of the base right rear side die, and two base right rear side die first rectangular grooves and base right rear side die second rectangular grooves which are symmetrically arranged up and down are formed in the rear section of the base right rear side die;

the rear section of the lateral surface of the base right rear side die is provided with a vertical base right rear side die locking hole, and the middle section and the rear section of the top surface of the base right rear side die are provided with vertical base right rear side die bolt holes.

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