CN210819801U

CN210819801U - Be applied to glyptic location frock of foam mold

Info

Publication number: CN210819801U
Application number: CN201921651497.8U
Authority: CN
Inventors: 周洲
Original assignee: Changzhou Chengwei Casting Co ltd
Current assignee: Changzhou Chengwei Casting Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-06-23
Anticipated expiration: 2029-09-29

Abstract

The utility model discloses a positioning tool applied to engraving of a foam mold, which comprises a workbench and a workpiece arranged on the workbench, and also comprises positioning blocks which are oppositely arranged on the workbench in pairs, locking blocks which are respectively arranged on the opposite side walls of the opposite positioning blocks in pairs and are attached to the right-angled side walls of the workpiece to form an L shape, and a pressing plate, wherein a first cavity is arranged in the workbench, a driving component for driving the opposite positioning blocks in pairs to relatively slide along the straight line where the straight lines of two opposite angles of the workbench are respectively arranged in the first cavity, a second cavity is arranged in the locking blocks, an installation component for fixing the locking blocks is arranged in the second cavity, the top walls of the two right-angled ends of the locking blocks are respectively provided with a lifting groove, and an adjusting part for driving the pressing plate to; the positioning device can fix the foam mould on the workbench quickly, avoids damage to a workpiece when the workpiece is fixed, improves stability of a foam template engraving process, and is high in machining efficiency.

Description

Be applied to glyptic location frock of foam mold

Technical Field

The utility model relates to an glyptic technical field of foam mold, in particular to be applied to the glyptic location frock of foam mold.

Background

The foam is a material that just twists easily after the atress, fracture, and when sculpture foam mould, the precision and the dynamics that require are all very high, so generally utilize the foam type engraver to carve, and the foam type engraver is a numerical control equipment of professional processing foam, belongs to light-duty digit control machine tool, when carving the foam, need stabilize the location to it to guarantee the machining precision.

The existing foam positioning mode generally places foam on a working table, and performs positioning and fixing through bolts, so that the foam is easily damaged, and the positioning efficiency is low; or the double faced adhesive tape is used for pasting, and the foam is light in weight, so that the foam shakes when being carved, the positioning is inaccurate, the production cost is increased, and the qualified rate of finished products is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be applied to glyptic location frock of foam mold, its advantage: the positioning device can fix the foam mould on the workbench quickly, avoids damage to a workpiece when the workpiece is fixed, improves stability of a foam template engraving process, and is high in machining efficiency.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a be applied to glyptic location frock of foam mold, includes the workstation and places the work piece on the workstation, still includes two liang of relative settings at the locating piece of workstation, sets up the relative lateral wall and the laminating of two liang of relative locating pieces and be the latch segment and the clamp plate of L type on work piece right angle lateral wall respectively, be equipped with first cavity in the workstation, be equipped with the drive assembly that two liang of relative locating pieces of drive respectively followed the relative slip of two diagonal straight lines place straight lines of workstation in the first cavity, be equipped with the second cavity in the latch segment, be equipped with the installation component who is used for fixed latch segment in the second cavity, the right angle both ends roof of latch segment all is equipped with the lift groove, be equipped with the regulating part that the drive clamp plate compressed tightly on the work piece.

According to the technical scheme, the locking block is fixed on the side wall of the positioning block by the aid of the mounting assembly; secondly, placing the workpiece on a workbench; then, the driving assembly is utilized to drive the two positioning blocks to relatively slide, and then the locking blocks can be attached to the diagonal side walls of the workpiece, so that the workpiece is positioned; finally, the pressing plate is driven to move downwards by the adjusting piece, so that the workpiece can be tightly pressed on the workbench, and the stability of fixing the workpiece is improved; by adjusting the distance between the two positioning blocks, workpieces with different length sizes can be positioned; the fixed pressing plate is driven to descend by the adjusting piece, so that workpieces with different height sizes can be positioned and fixed; adopt the location frock that above-mentioned structure constitutes, replace the manpower fixed to the work piece, labour saving and time saving can be quick fixes the foam mould on the workstation, has improved the stability to the foam template sculpture in-process, and machining efficiency is high.

The utility model discloses further set up to: the drive assembly comprises two lead screws which are arranged in a first cavity in a staggered mode, a sliding block nut which slides in the first cavity and is in threaded fit with the two ends of the lead screws respectively, and a motor which drives the two lead screws to rotate respectively, the threads at the two ends of the lead screws are reverse in rotating direction, the top ends of the sliding block nuts extend out of the top wall of the workbench and are fixed on the bottom wall of the positioning block, the axis of the lead screws is located on the same horizontal straight line with the straight line where two diagonal straight lines of the workbench are located, and the top wall of the workbench is provided with an opening for the sliding block nut to slide.

According to the technical scheme, when positioning is carried out, a workpiece is placed on the workbench, the motor is started, the screw rod rotates, the opening has a limiting effect on the movement of the slide block nut, and then the two opposite slide block nuts are close to or far away from each other along the length direction of the screw rod, so that the two locking blocks are driven to move relatively, the locking blocks are attached to the diagonal side walls of the workpiece, and the positioning of the workpiece is realized; this drive mode, convenient operation replaces the manpower to the work piece location, and labour saving and time saving has improved machining efficiency.

The utility model discloses further set up to: the installation component comprises an installation block, a first fluted disc, a second fluted disc, racks, an insert block, sliders, a sawtooth rack and a handle, wherein the installation block is arranged on two side walls of the right-angle end of the locking block respectively, the first fluted disc and the second fluted disc are arranged in the second cavity in a relatively rotating mode, the racks are respectively meshed with the first fluted disc and the second fluted disc, the insert block is arranged on two opposite side walls of the racks, the sliders are respectively arranged on two top walls and bottom walls of the racks, the sawtooth rack slides in the second cavity and is located between the first fluted disc and the second fluted disc, the handle is arranged on one side wall of the sawtooth rack, the inner top wall and the bottom wall of the second cavity are respectively provided with a sliding groove and a sliding groove along the axial direction, the sliders slide in the two sliding grooves respectively, the opposite side walls of the installation block are provided with inserting slots for the insert of the insert block, the side wall.

According to the technical scheme, during installation, the installation block firstly penetrates through the installation opening and is inserted into the second cavity; secondly, pulling the handle to drive the sawtooth racks to slide outwards, and rotating the first fluted disc and the second fluted disc inwards at the moment; then the handle is pushed, so that the first fluted disc and the second fluted disc rotate reversely, the two racks are far away from each other, the inserting block can be inserted into the slot, the mounting block is fixed in the second cavity, and the mounting of the locking block is realized; the arrangement of the sliding chute plays a role in limiting and guiding the sliding of the rack; this mounting means, simple structure through the pulling handle, alright insert the slot with the inserted block in, convenient operation makes things convenient for the dismouting to change the latch segment of different dimensions, with the work piece of cooperation different size shapes, application scope is wide.

The utility model discloses further set up to: the both ends of first fluted disc and second fluted disc are equipped with first pivot, second pivot and second cavity inner wall rotation respectively and are connected, are located the height dimension of the first pivot of first fluted disc roof is greater than the height dimension of the first pivot of second fluted disc roof, is located the length dimension of the second pivot of first fluted disc diapire is greater than the height dimension of the second pivot of second fluted disc diapire.

Through the technical scheme, the height dimension of the first rotating shaft on the second fluted disc top wall is smaller than that of the first fluted disc top wall, and the height dimension of the second rotating shaft on the first fluted disc bottom wall is smaller than that of the second rotating shaft on the second fluted disc bottom wall, so that the two racks are staggered with each other, the racks are convenient to slide, and the inserting blocks can be stably inserted into the inserting grooves.

The utility model discloses further set up to: the inner wall of the second cavity is provided with a limiting spring and is fixed on the end wall of the sawtooth rack far away from the handle, and the extending direction of the limiting spring is the same as the axial direction of the sawtooth rack.

Through above-mentioned technical scheme, spacing spring's setting plays limiting displacement to the removal of sawtooth rack for when promoting the handle, utilize spacing spring's the power that contracts of returning, can pull back the sawtooth rack in the second cavity, make when not having the exogenic action, the inserted block can be stably fixed in the slot, and then has improved the stability fixed to the locking piece.

The utility model discloses further set up to: the adjusting piece is an air cylinder arranged in the lifting groove, a piston rod of the air cylinder is fixed at one end of the bottom wall of the pressing plate, and the extending direction of the piston rod of the air cylinder is the same as the height direction of the positioning block.

According to the technical scheme, the air cylinder is started, the piston rod of the driving air cylinder retracts, the pressing plate is driven to move downwards, the workpiece is pressed on the workbench through the pressing plate, and the stability of fixing the workpiece is enhanced; and the air cylinder is used for driving, so that the operation is convenient, and the time and the labor are saved.

The utility model discloses further set up to: the lateral wall of opening is equipped with memory sponge expansion ring, the inner ring laminating of memory sponge expansion ring is on the lateral wall of slider nut, memory sponge expansion ring is flexible along open-ended width direction.

Through above-mentioned technical scheme, owing to in the sculpture process to the foam mold, can produce a large amount of foam bits, utilize the good elasticity of memory sponge expansion ring for when the slider nut slides, the inner ring of memory sponge expansion ring is hugged closely on the lateral wall of slider nut, in order to fill the gap between slider nut lateral wall and the opening lateral wall, avoids taking the bits to fall into first cavity in, influences the rotation of lead screw, has improved the stability of slider nut process of sliding.

The utility model discloses further set up to: and rubber pads are arranged on the side walls of the locking block, the pressing plate and the workpiece, which are in contact with each other.

Through above-mentioned technical scheme, the compactness of laminating between latch segment, clamp plate and the foam template has been strengthened in the setting of rubber pad, plays the guard action to the outer wall of work piece simultaneously, causes the damage when avoiding fixing the work piece.

To sum up, the utility model discloses following beneficial effect has:

1. firstly, fixing a locking block on the side wall of a positioning block by using a mounting assembly; secondly, placing the workpiece on a workbench; then, the driving assembly is utilized to drive the two positioning blocks to relatively slide, and then the locking blocks can be attached to the diagonal side walls of the workpiece, so that the workpiece is positioned; finally, the pressing plate is driven to move downwards by the adjusting piece, so that the workpiece can be tightly pressed on the workbench, and the stability of fixing the workpiece is improved; the positioning tool formed by the structure replaces manpower to fix the workpiece, is time-saving and labor-saving, can quickly fix the foam die on the workbench, improves the stability of the foam die plate in the engraving process, and has high processing efficiency;

2. the motor is started, the screw rod rotates, and the opening has a limiting effect on the movement of the slide block nuts, so that the two opposite slide block nuts are close to or far away from each other along the length direction of the screw rod, and the two locking blocks are driven to move relatively, so that the locking blocks are attached to the diagonal side walls of the workpiece, and the workpiece is positioned; the driving mode is convenient to operate, replaces manpower to position the workpiece, saves time and labor and improves the machining efficiency;

3. spacing spring plays limiting displacement to the removal of sawtooth rack for when promoting the handle, utilize spacing spring's the power of returning to, can pull back sawtooth rack in the second cavity, make when not having the exogenic action, the inserted block can be stably fixed in the slot, and then improved the stability fixed to the locking piece.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic top sectional structural view for embodying the hidden table in the present embodiment.

FIG. 3 is an enlarged schematic view of part A in FIG. 2.

FIG. 4 is a side sectional structural schematic view for embodying the bottom end of the workbench.

Fig. 5 is a schematic side sectional view for embodying the structure between the locking block and the positioning block.

Fig. 6 is an enlarged schematic structural view for embodying the portion B in fig. 5.

Fig. 7 is a schematic view of an internal structure for embodying the second cavity.

Reference numerals: 1. a work table; 2. a workpiece; 3. positioning blocks; 4. a locking block; 5. pressing a plate; 6. a first cavity; 7. a drive assembly; 71. a screw rod; 72. a slider nut; 73. a motor; 8. a second cavity; 9. mounting the component; 91. mounting blocks; 92. a first fluted disc; 93. a second fluted disc; 94. a rack; 95. inserting a block; 96. a slider; 97. a sawtooth strip; 98. a handle; 10. a lifting groove; 11. an adjustment member; 110. a cylinder; 12. An opening; 13. a chute; 14. a slot; 15. an installation port; 16. a limiting spring; 17. a memory sponge expansion ring; 18. a rubber pad; 19. a first rotating shaft; 20. a second rotating shaft; 21. a keel frame; 22. full-automatic engraver.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

the utility model provides a be applied to glyptic location frock of foam mould, refers to figure 1, includes rectangle workstation 1, and it has keel frame 21 to slide along its length direction on the workstation 1, and keel frame 21 slides on is equipped with full-automatic engraver 22, places on the workstation 1 and takes glyptic work piece 2.

Referring to fig. 1 and 2, two opposite positioning blocks 3 are arranged on a workbench 1, the two positioning blocks 3 are respectively arranged oppositely along diagonal straight lines of the workbench 1, locking blocks 4 attached to right-angled side walls of a workpiece 2 are respectively arranged on opposite side walls of the two opposite positioning blocks 3, the locking blocks 4 are arranged in an L shape, a first cavity 6 (fig. 4) is arranged in the workbench 1, and driving assemblies 7 (fig. 4) for driving the two opposite positioning blocks 3 to respectively slide oppositely along the diagonal straight lines of the workbench 1 are arranged in the first cavity 6 (fig. 4), so that the four locking blocks 4 are respectively attached to the four-corner side walls of the workpiece 2, and the positioning of the workpiece 2 is realized; a second cavity 8 (shown in figure 5) is arranged in the locking block 4, and an installation component 9 (shown in figure 5) for fixing the locking block 4 is arranged in the second cavity 8 (shown in figure 5), so that the locking blocks 4 with different sizes can be conveniently disassembled, assembled and replaced to match with workpieces 2 with different shapes and specifications, and the application range is wide;

the top walls of the two right-angled ends of the locking block 4 are respectively provided with a pressing plate 5 attached to the top wall of the right angle of the workpiece 2, the top wall of the right angle of the locking block 4 extends downwards to be provided with a lifting groove 10 (figure 3), and an adjusting part 11 (figure 3) for driving the pressing plate 5 to lift along the height direction of the lifting groove is arranged in the lifting groove 10, so that the height of the pressing plate 5 can be adjusted, the pressing plate 5 is attached to the top wall of the workpiece 2, the stability for fixing the workpiece 2 is enhanced, and the workpieces 2 with different thickness and sizes can be pressed by adjusting the height of the pressing plate 5; the positioning tool with the structure can be used for quickly fixing the foam mould on the workbench 1, so that the stability of the foam template in the engraving process is improved, and the processing efficiency is improved.

Referring to fig. 2, rubber pads 18 are arranged on the side walls of the locking block 4 and the pressing plate 5, which are in contact with the workpiece 2; the rubber pad 18 is arranged, so that the tightness of the fitting among the locking block 4, the pressing plate 5 and the foam template is enhanced, meanwhile, the outer wall of the workpiece 2 is protected, and the workpiece 2 is prevented from being damaged when being fixed.

Referring to fig. 3, the adjusting member 11 is an air cylinder 110 disposed in the lifting groove 10, a piston rod of the air cylinder 110 is fixed to one end of a bottom wall of the pressing plate 5, the other end of the pressing plate 5 extends above the workpiece 2, and an extending direction of the piston rod of the air cylinder 110 is the same as a height direction of the positioning block 3; the air cylinder 110 is started, a piston rod of the air cylinder 110 is driven to retract, the pressing plate 5 is driven to move downwards, and then the workpiece 2 is pressed on the workbench 1 by the pressing plate 5, so that the stability of fixing the workpiece 2 is enhanced; and the air cylinder 110 is used for driving, so that the operation is convenient, and the time and the labor are saved.

Referring to fig. 1 and 4, the driving assembly 7 includes two screw rods 71 rotatably disposed in the first cavity 6 in an up-down staggered manner, slider nuts 72 sliding on the bottom wall of the first cavity 6 and respectively in threaded fit with two ends of the screw rods 71, and a motor 73 driving the screw rods 71 to rotate, the thread turning directions of two ends of the screw rods 71 are opposite, the top ends of the slider nuts 72 extend out of the top wall of the workbench 1 and are fixed on the bottom wall of the positioning block 3, the axes of the two screw rods 71 are respectively located on the same horizontal straight line with the straight lines of two diagonal straight lines of the workbench 1, the top wall of the workbench 1 is provided with an opening 12 for the slider nuts 72 to slide, and the length direction of the opening 12 is in the same direction as the axial direction of; when positioning, the workpiece 2 is placed on the workbench 1, then the motor 73 is started, the screw rod 71 rotates, the opening 12 has a limiting effect on the movement of the slide block nut 72, and then the two opposite slide block nuts 72 are close to or far away from each other along the length direction of the screw rod 71, so that the two locking blocks 4 are driven to move relatively, and therefore the locking blocks 4 are attached to the diagonal side walls of the workpiece 2, and the positioning of the workpiece 2 is realized; this drive mode, convenient operation replaces the manpower to fix a position work piece 2, and labour saving and time saving has improved machining efficiency.

Referring to fig. 4, a memory sponge expansion ring 17 is arranged on the side wall of the opening 12, an inner ring of the memory sponge expansion ring 17 is attached to the side wall of the slider nut 72, the memory sponge expansion ring 17 is rectangular, and the memory sponge expansion ring 17 expands and contracts along the width direction of the opening 12; because the foam mould sculpture in-process can produce a large amount of foam bits, utilize the good elasticity of memory sponge expansion ring 17 for when slider nut 72 slided, the inner ring of memory sponge expansion ring 17 hugs closely on the lateral wall of slider nut 72, in order to fill up the gap between slider nut 72 lateral wall and the opening 12 lateral wall, avoid spending the bits to fall into first cavity 6 in, influence the rotation of lead screw 71, improved the stability of slider nut 72 process of sliding.

Referring to fig. 6 and 7, the mounting assembly 9 includes a mounting block 91 respectively disposed on two side walls of a right-angled end of the locking block (fig. 5), two first toothed discs 92 and two second toothed discs 93 relatively rotatably disposed on an upper wall of the second cavity 8, racks 94 respectively engaged with the first toothed disc 92 and the second toothed disc 93, an insert block 95 respectively fixed on opposite side walls of the two racks 94, sliders 96 respectively disposed on upper walls and a lower wall of the two racks 94, a saw rack 97 slidably disposed in the second cavity 8 and located between the first toothed disc 92 and the second toothed disc 93, and a handle 98 disposed on one side wall of the saw rack 97, a mounting opening 15 for inserting the mounting block 91 into the second cavity 8 is disposed on a side wall of the positioning block 3, two opposite slide grooves 13 are disposed on an inner upper wall and an inner bottom wall of the second cavity 8 along axial directions thereof, the two sliders 96 respectively slidably disposed in the two slide grooves 13, opposite side walls of the two mounting blocks 91 are provided with slots 14 for inserting the insert block 95, one end of the handle 98 far away from the sawtooth strip 97 extends out of the side wall of the positioning block 3;

when the mounting is carried out, the mounting block 91 firstly passes through the mounting opening 15 and is inserted into the second cavity 8; secondly, the handle 98 is pulled to drive the sawtooth rack 97 to slide outwards, and at the moment, the first fluted disc 92 and the second fluted disc 93 rotate relatively towards the sawtooth rack 97; then, the handle 98 is pushed, so that the first toothed disc 92 and the second toothed disc 93 rotate reversely, the two racks 94 are far away from each other, and the insert block 95 can be inserted into the slot 14, so that the mounting block 91 is fixed in the second cavity 8, and the mounting of the locking block 4 (fig. 5) is realized; this mounting means, simple structure through pulling handle 98, alright insert the slot 14 with the inserted block 95 in, convenient operation makes things convenient for the dismouting to change the latch segment 4 (fig. 5) of different dimensions, with the work piece 2 of the cooperation different size shapes, application scope is wide.

Referring to fig. 6 and 7, the first rotating shaft 19 and the second rotating shaft 20 are respectively disposed at two ends of the first fluted disc 92 and the second fluted disc 93, and are rotatably connected to the inner wall of the second cavity 8, the height dimension of the first rotating shaft 19 located at the top wall of the first fluted disc 92 is greater than the height dimension of the first rotating shaft 19 located at the top wall of the second fluted disc 93, and the length dimension of the second rotating shaft 20 located at the bottom wall of the first fluted disc 92 is greater than the height dimension of the second rotating shaft 20 located at the bottom wall of the second fluted disc 93, so that the two racks 94 can be staggered relatively, the racks 94 can be conveniently slid, and the insert blocks 95 can be stably inserted into the slots 14.

Referring to fig. 5 and 7, the inner wall of the second cavity 8 is provided with a limiting spring 16 and fixed on the end wall of the sawtooth rack 97 far away from the handle 98, and the extending direction of the limiting spring 16 is the same as the axial direction of the sawtooth rack 97; limiting spring 16's setting plays limiting displacement to sawtooth rack 97's removal for when promoting handle 98, utilize limiting spring 16's the power of withdrawing, can pull back sawtooth rack 97 to in second cavity 8, make when not having the exogenic action, inserted block 95 can be stably fixed in slot 14, and then improved the stability fixed to locking piece 4.

The working process is as follows: firstly, the handle 98 is pulled to drive the sawtooth rack 97 to slide outwards, the limit spring 16 is stretched, and at the moment, the first fluted disc 92 and the second fluted disc 93 rotate inwards to drive the two racks 94 to approach each other; then, the handle 98 is released, the serrated disc can be pulled into the second cavity 8 by using the elastic force of the limiting spring 16, and simultaneously, the first fluted disc 92 and the second fluted disc 93 rotate outwards, so that the two racks 94 are far away from each other, and the insert block 95 can be fixed in the slot 14, thereby fixing the locking block 4; then, the motor 73 is started, the screw rod 71 rotates, the two sliding block nuts 72 approach each other, and the two locking blocks 4 relatively slide along the diagonal line of the workbench 1 and are attached to the side wall of the workpiece 2, so that the workpiece 2 is positioned; and finally, starting the air cylinder 110, and pressing the top wall of the workpiece 2 by utilizing the retraction of the piston rod of the air cylinder 110 and the downward movement of the pressing plate 5, thereby finally realizing the positioning and fixing of the workpiece 2.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a be applied to glyptic location frock of foam mold, includes workstation (1) and places work piece (2) on workstation (1), its characterized in that: also comprises positioning blocks (3) which are oppositely arranged on the worktable (1) in pairs, locking blocks (4) which are respectively arranged on the opposite side walls of the positioning blocks (3) which are oppositely arranged in pairs and are attached to the right-angled side wall of the workpiece (2) to form an L shape, and a pressure plate (5), a first cavity (6) is arranged in the workbench (1), a driving component (7) for driving every two opposite positioning blocks (3) to relatively slide along the straight line where the two diagonal straight lines of the workbench (1) are located is arranged in the first cavity (6), a second cavity (8) is arranged in the locking block (4), a mounting component (9) for fixing the locking block (4) is arranged in the second cavity (8), the top walls at the two right-angle ends of the locking block (4) are provided with lifting grooves (10), and an adjusting piece (11) for driving the pressing plate (5) to be pressed on the top wall of the workpiece (2) is arranged in the lifting groove (10).

2. The positioning tool applied to engraving of the foam mold as claimed in claim 1, wherein: the driving assembly (7) comprises two lead screws (71) which are arranged in a first cavity (6) in a staggered mode, a sliding block nut (72) which is arranged on the bottom wall in the first cavity (6) in a sliding mode and is matched with the two ends of the lead screws (71) in a threaded mode, and a motor (73) which drives the two lead screws (71) to rotate respectively, the threads on the two ends of each lead screw (71) are opposite in rotating direction, the top end of each slider nut (72) extends out of the top wall of the workbench (1) and is fixed on the bottom wall of the positioning block (3), the axis of each lead screw (71) is located on the same horizontal straight line with the straight line where two diagonal straight lines of the workbench (1) are located, and the top wall of the workbench (1) is provided with an opening (12) for the sliding block nut (.

3. The positioning tool applied to engraving of the foam mold as claimed in claim 1, wherein: the mounting assembly (9) comprises mounting blocks (91) respectively arranged on two side walls of a right-angle end of the locking block (4), two first fluted discs (92) and two second fluted discs (93) which are relatively rotatably arranged in the second cavity (8), racks (94) respectively meshed with the first fluted discs (92) and the second fluted discs (93), an insert block (95) arranged on the side walls of the two racks (94) which are relatively deviated, sliders (96) respectively arranged on the top wall and the bottom wall of the two racks (94), a sawtooth rack (97) which slides in the second cavity (8) and is positioned between the first fluted discs (92) and the second fluted discs (93), and a handle (98) arranged on one side wall of the sawtooth rack (97), sliding grooves (13) are respectively arranged on the inner wall and the bottom wall of the second cavity (8) along the axial direction of the second cavity, the two sliders (96) respectively slide in the two sliding grooves (13), and opposite side walls of the two mounting blocks (91) are provided with slots (14) for inserting the insert blocks (95), the side wall of the positioning block (3) is provided with an installation opening (15) for inserting the installation block (91) into the second cavity (8), and one end of the handle (98), which is far away from the sawtooth rack (97), extends out of the side wall of the positioning block (3).

4. The positioning tool applied to engraving of the foam mold as claimed in claim 3, wherein: the two ends of the first fluted disc (92) and the second fluted disc (93) are respectively provided with a first rotating shaft (19), a second rotating shaft (20) and are rotationally connected with the inner wall of the second cavity (8), the height of the first rotating shaft (19) on the top wall of the first fluted disc (92) is larger than that of the first rotating shaft (19) on the top wall of the second fluted disc (93), and the length of the second rotating shaft (20) on the bottom wall of the first fluted disc (92) is larger than that of the second rotating shaft (20) on the bottom wall of the second fluted disc (93).

5. The positioning tool applied to engraving of the foam mold as claimed in claim 3, wherein: the inner wall of the second cavity (8) is provided with a limiting spring (16) and is fixed on the end wall of the sawtooth rack (97) far away from the handle (98), and the extending direction of the limiting spring (16) is in the same direction with the axial direction of the sawtooth rack (97).

6. The positioning tool applied to engraving of the foam mold as claimed in claim 1, wherein: the adjusting piece (11) is an air cylinder (110) arranged in the lifting groove (10), a piston rod of the air cylinder (110) is fixed at one end of the bottom wall of the pressing plate (5), and the extending direction of the piston rod of the air cylinder (110) is the same as the height direction of the positioning block (3).

7. The positioning tool applied to engraving of the foam mold as claimed in claim 2, wherein: the lateral wall of opening (12) is equipped with memory sponge expansion ring (17), the inner ring laminating of memory sponge expansion ring (17) is on the lateral wall of slider nut (72), memory sponge expansion ring (17) are flexible along the width direction of opening (12).

8. The positioning tool applied to engraving of the foam mold as claimed in claim 1, wherein: and rubber pads (18) are arranged on the side walls of the locking block (4) and the pressing plate (5) which are contacted with the workpiece (2).