Novel positioning clamp

Abstract

The invention relates to the technical field of capacitor machining clamps, in particular to a novel positioning clamp which comprises a base, a lower die holder, an upper die holder, a pair of side positioning seats and a lifting adjusting mechanism, the lower die holder is mounted on the upper rear side of the base, and sinking grooves are formed in the lower die holder at intervals in the length direction of the lower die holder; a first positioning groove is formed in the inner bottom wall of each sinking groove, a second positioning groove is formed in the position, located on one side of each sinking groove, of the lower die base, the surface of the inner bottom wall of each second positioning groove is higher than that of the inner bottom wall of each first positioning groove, and first containing holes are formed in the two top corners of each first positioning groove and the two top corners of each second positioning groove. The first positioning groove and the second positioning groove are used for primary positioning of the laminated busbar, the first accommodating hole and the second accommodating hole are used for secondary positioning of the laminated busbar, double positioning of the laminated busbar is achieved, most parts of the positioning clamp are made of die steel materials, positioning precision is greatly improved, and the positioning clamp is simple in structure and convenient to use. And therefore, the accuracy of the welding size of the laminated busbar is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor processing fixtures, in particular to a novel positioning fixture. Background Art

[0002] Capacitors are electrical components that store electric charge. There are many types of capacitors on the market, which can be roughly divided into several categories such as ceramic, electrolytic, and film. Among them, film capacitors are widely used in analog circuits because of their advantages such as non-polarity, high insulation impedance, excellent frequency characteristics, and low dielectric loss. Especially in the signal interconnection part, capacitors with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal will not be distorted too much during transmission.

[0003] Film capacitors generally include plastic shells, core packages, laminated busbars, epoxy resin, etc. Film capacitors are generally made by overlapping metal films at both ends, winding them into a cylindrical core, and then welding the core and busbars after high-temperature hot pressing to set the shape and volume. In the process of making film capacitors, the busbar needs to be welded to the end face of the core, and the busbar and the shell need to be encapsulated and cured with epoxy resin to fix the laminated busbar on the shell.

[0004] When welding the laminated busbar, a positioning fixture is needed to locate the size of the welding. The specific operation process is to place the input terminal of the laminated busbar into the slot of the positioning fixture, and then position and install the positioning fixture and the shell to control the dimensional accuracy. However, due to errors in the production and installation of the positioning fixture, cumulative errors will occur in the finished capacitor. If this problem is to be solved, it is necessary to be careful and serious at all times during the installation process, and after each step of assembly is completed, a dimensional positioning inspection is required. On the one hand, it will increase the workload, and on the other hand, it cannot guarantee that every product can be accurately in place. Summary of the invention

[0005] The purpose of the present invention is to provide a new positioning fixture with good positioning effect to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions.

[0007] A novel positioning fixture comprises a base, a lower die base, an upper die base, a pair of side positioning seats and a lifting and adjusting mechanism, the lower die base is installed on the rear side of the base, and sink grooves are arranged at intervals along its length direction on the lower die base, each sink groove is provided with a first positioning groove on the bottom wall, and a second positioning groove is provided on one side of the sink groove on the lower die base, the bottom wall surface of the second positioning groove is higher than the bottom wall surface of the first positioning groove, and first receiving holes are provided at two vertex corners of each first positioning groove and each second positioning groove, and second receiving holes are provided on the bottom wall of each first positioning groove and each second positioning groove, and the first receiving holes and the second receiving holes are used to match and accommodate the rivet nuts on the laminated busbar, and the lifting and adjusting mechanism is arranged above the base, and the upper die base is arranged directly above the lower die base through the lifting and adjusting mechanism, and the lifting and adjusting mechanism is used to drive the upper die base to perform lifting and adjusting, and lower pressing blocks that can be matched and pressed into the sink grooves are fixed at the corresponding positions of the lower surface of the upper die base and the positions of each sink groove, and the positioning seats on both sides are symmetrically arranged above the base and located at the front side of the lower die base, and are used to position and assemble the capacitor housing.

[0008] The first positioning groove and the second positioning groove are used to perform primary positioning of the laminated busbar, and the first and second capacity holes are used to position the laminated busbar again, thereby realizing double positioning of the laminated busbar, and most parts of the positioning fixture are made of mold steel material, which greatly increases the positioning accuracy, thereby ensuring the accuracy of the welding size of the laminated busbar. Secondly, the capacitor shell is positioned using the positioning seats on both sides, and then epoxy resin is poured in for packaging and fixing. After the epoxy resin is cured, the positioning fixture is removed, thereby controlling the assembly size accuracy of the capacitor within the required range, thereby improving the quality control of the capacitor.

[0009] Preferably, the top surfaces of the two side positioning seats are fixed with positioning pins extending vertically upward, and the positioning pins can be inserted into the positioning holes on the capacitor housing in a matching manner. The top surfaces of the two side positioning seats are provided with screw holes, and the screw holes are used to fasten the capacitor housing with bolts.

[0010] Preferably, vertical guide holes are provided on both sides of the lower mold base, and guide rods are slidably installed in the two guide holes. The upper mold base is fixed on the top ends of the two guide rods, and anti-drop caps are fixed at the bottom ends of the two guide rods. The diameter of the anti-drop caps is larger than the inner diameter of the guide holes, and support seats are fixed on both sides of the bottom of the base.

[0011] Preferably, the lifting and adjusting mechanism includes a pair of columns, a suspension, a lifting slide and a driving mechanism, the two columns are vertically fixed on both sides of the base, the suspension is fixed on the top of the two columns, the lifting slide is slidably mounted on the two columns and is located below the suspension, the upper mold base is fixed on the lower surface of the lifting slide, and the driving mechanism is arranged on the suspension to drive the lifting slide to perform lifting and adjusting.

[0012] Preferably, the driving mechanism includes a rack, a gear, a worm wheel and a worm. A clearance groove is provided on the suspension. The rack is fixed to the upper surface of the lifting slide and vertically extends through the clearance groove to above the suspension. A pair of first brackets are fixed on the suspension. A shaft rod is rotatably installed between the two first brackets. The gear and the worm wheel are fixedly mounted on the shaft rod. The gear meshes with the rack correspondingly. A second bracket is fixed above the lifting slide. The worm is rotatably installed on the second bracket. The worm meshes with the worm wheel correspondingly. A rocker is installed on the end of the worm.

[0013] Preferably, the lower die base and the upper die base are equipped with multiple models, and an assembly groove is provided on the rear side of the base. The lower die base is detachably matched and installed in the assembly groove by a first fastening bolt, and the upper die base is detachably installed under the lifting slide by a second fastening bolt.

[0014] Preferably, a translation adjustment mechanism is provided on the base, and the translation adjustment mechanism is used to drive the positioning seats on both sides to translate and adjust to move closer to or away from each other.

[0015] Preferably, the translation adjustment mechanism includes a bidirectional threaded rod, a twist handle and a pair of nut seats. A guide groove is provided on the upper surface of the base. The bidirectional threaded rod is rotatably installed in the guide groove. One end of the bidirectional threaded rod extends through and extends to the outer side of the base and is installed with a twist handle. The two nut seats are symmetrically and slidably installed on both sides of the guide groove and are threadedly mounted on both sides of the bidirectional threaded rod. The positioning seats on both sides are installed one by one on the top of the nut seats.

[0016] Preferably, the side positioning seat is provided with a plurality of models, and the side positioning seat is detachably mounted on the top of the nut seat by means of a fastening screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0018] 1. The present invention utilizes the first positioning groove and the second positioning groove to perform primary positioning on the laminated busbar, and utilizes the first capacity hole and the second capacity hole to position the laminated busbar again, thereby realizing double positioning of the laminated busbar, and most of the components of the positioning fixture are made of mold steel material, which greatly increases the positioning accuracy, thereby ensuring the accuracy of the welding size of the laminated busbar, and then utilizes the positioning seats on both sides to position the capacitor housing, and then injects epoxy resin to package and fix it, and after the epoxy resin is cured, the positioning fixture is removed, thereby controlling the assembly size accuracy of the capacitor within the required range, thereby improving the quality control of the capacitor.

[0019] 2. The present invention drives the lifting slide and the upper die seat to lift and lower by shaking the rocker to drive the worm to rotate and mesh with the worm wheel to rotate. The one-way transmission effect of the worm and the worm wheel is used to achieve a self-locking effect. When not adjusting, it is ensured that the upper die seat will not be lifted or moved at will, which helps to maintain the state of the upper die seat, thereby ensuring that the upper die seat can provide a continuous clamping effect and ensure stability during positioning.

[0020] 3. The lower die base and the upper die base in the present invention have multiple models. The lower die base is detachably installed in the assembly groove by using the first fastening bolt, and the upper die base is detachably installed under the lifting slide by using the second fastening bolt, so that the lower die base and the upper die base can be disassembled and replaced as a whole, and different models of components can be replaced to adapt to the processing of capacitors of different models, so that one fixture can be equipped with multiple products, thereby improving the versatility of the fixture.

[0021] 4. The side positioning seat in the present invention is equipped with multiple models. The side positioning seat is detachably installed on the top of the nut seat by fastening screws. The side positioning seat is disassembled and replaced with different models, so as to position and fix capacitor housings of different models. In addition, by pinching the twist handle and screwing the bidirectional threaded rod, the rotating bidirectional threaded rod threads drive the two nut seats to move closer to or away from each other, thereby driving the positioning seats on both sides to move closer to or away from each other to adapt to capacitor housings of different models, thereby further ensuring the versatility of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is one of the three-dimensional schematic diagrams of the overall structure of the present invention;

[0023] Figure 2 This is the second three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the local structure above the base in the present invention;

[0025] Figure 4 It is a schematic diagram of the assembly of the upper die base and the lower die base structure in the present invention;

[0026] Figure 5 It is a detailed structural diagram of the translation adjustment mechanism in the present invention;

[0027] Figure 6 It is a detailed structural diagram of the lifting and lowering adjustment mechanism in the present invention;

[0028] Figure 7 It is a schematic diagram of the local structure of the suspension surface in the present invention.

[0029] In the figure: 1, base; 101, support seat; 11, assembly groove; 12, first fastening bolt; 2, lower die seat; 201, sink groove; 202, guide hole; 21, first positioning groove; 22, second positioning groove; 23, first receiving hole; 24, second receiving hole; 3, upper die seat; 301, guide rod; 302, anti-drop cap; 31, lower pressure block; 4, side positioning seat; 41, positioning pin; 42, screw hole; 5, lifting and lowering adjustment mechanism; 51. column; 52. suspension; 521. give way groove; 53. lifting slide; 531. second fastening bolt; 54. driving mechanism; 541. rack; 542. first bracket; 543. shaft; 544. gear; 545. worm gear; 546. second bracket; 547. worm; 548. rocker; 6. translation adjustment mechanism; 601. guide groove; 61. two-way threaded rod; 62. twist handle; 63. nut seat. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 7 The present invention provides a novel positioning fixture, including a base 1, a lower die base 2, an upper die base 3, a pair of side positioning bases 4 and a lifting and adjusting mechanism 5. The lower die base 2 is installed on the rear side of the base 1. The lower die base 2 is provided with recessed grooves 201 at intervals along its length direction. The bottom wall of each recessed groove 201 is provided with a first positioning groove 21. The lower die base 2 is provided with a second positioning groove 22 on one side of the recessed groove 201. The two top corners of each first positioning groove 21 and each second positioning groove 22 are provided with a first receiving hole 23. The bottom wall of each first positioning groove 21 and each second positioning groove 22 is provided with a second receiving hole 24. The first receiving hole 23 and the second receiving hole 24 are used to match and accommodate the rivet nut on the laminated busbar. The lifting and adjusting mechanism 5 is arranged at Above the base 1, the upper mold base 3 is arranged directly above the lower mold base 2 through a lifting and adjusting mechanism 5. The lifting and adjusting mechanism 5 is used to drive the upper mold base 3 to be lifted and adjusted. The lower surface of the upper mold base 3 and the corresponding positions of each sink groove 201 are fixed with a lower pressing block 31 that can be matched and pressed into the sink groove 201. The positioning seats 4 on both sides are symmetrically arranged above the base 1 and located at the front side of the lower mold base 2, and are used to position and assemble the capacitor housing. The first positioning groove 21 and the second positioning groove 22 are designed on the left and the right. In addition, the first positioning groove 21 is provided on the inner bottom wall of the sink groove 201, so that the inner bottom wall surface of the second positioning groove 22 is higher than the inner bottom wall surface of the first positioning groove 21, forming a height difference, which is consistent with the shape of the laminated busbar and has a high degree of adaptability.

[0032] When the clamp is used for welding the laminated busbar, firstly, the upper die seat 3 is driven to move upward by operating the lifting and adjusting mechanism 5, so that the upper die seat 3 is separated from the lower die seat 2, thereby making room above the lower die seat 2, and then the laminated busbar is fit-fitted into the first positioning groove 21 and the second positioning groove 22. Secondly, when the laminated busbar is inserted into the first positioning groove 21 and the second positioning groove 22, the rivet nuts thereon are fit-fitted into the first receiving hole 23 and the second receiving hole 24 respectively, and then the lifting and adjusting mechanism 5 is operated to drive the upper die seat 3 to be pressed downward, and the lower pressing block 31 is pressed into the sink 201, so that the laminated busbar can be pressed tightly into the first positioning groove 21, and at the same time, the lower surface of the upper die seat 3 can be used to partially press the laminated busbar In the second positioning groove 22, the positioning and fixing of the laminated busbar is realized. The first positioning groove 21 and the second positioning groove 22 are used to perform primary positioning of the laminated busbar. The first capacity hole 23 and the second capacity hole 24 can be used to position the laminated busbar again, thereby realizing double positioning of the laminated busbar. Most parts of the positioning fixture are made of mold steel material, which greatly increases the positioning accuracy, thereby ensuring the accuracy of the welding size of the laminated busbar. Secondly, the positioning seats 4 on both sides are used to position the capacitor shell, and then epoxy resin is poured in for packaging and fixing. After the epoxy resin is cured, the positioning fixture is removed, thereby controlling the assembly size accuracy of the capacitor within the required range, thereby improving the quality control of the capacitor.

[0033] Specifically, the top surfaces of the positioning seats 4 on both sides are fixed with positioning pins 41 extending vertically upward, and the positioning pins 41 can be matched and inserted into the positioning holes on the capacitor housing. The top surfaces of the positioning seats 4 on both sides are provided with screw holes 42, and the screw holes 42 are used for bolting the capacitor housing. The positioning pins 41 are aligned and inserted into the positioning holes on the capacitor housing to position the capacitor housing, and then the bolts are tightened into the screw holes 42 to fix the capacitor housing, so that the capacitor housing can be positioned and fixed on the fixture to achieve control of assembly accuracy. After assembly, the bolts are unscrewed from the screw holes 42, and then the capacitor housing is removed from the side positioning seats 4 to achieve the overall detachment of the capacitor.

[0034] Specifically, vertical guide holes 202 are provided on both sides of the lower mold base 2, and guide rods 301 are slidably installed in the two guide holes 202. The upper mold base 3 is fixed on the top of the two guide rods 301. The sliding cooperation between the guide rods 301 and the guide holes 202 provides a limiting guide support effect for the lifting and lowering adjustment of the upper mold base 3, thereby ensuring that the lifting and lowering process of the upper mold base 3 is smooth and stable enough.

[0035] In addition, the bottom ends of the two guide rods 301 are fixed with anti-drop caps 302, and the diameter of the anti-drop caps 302 is larger than the inner diameter of the guide hole 202. The anti-drop caps 302 are used to prevent the guide rods 301 from sliding out of the guide holes 202 due to excessive upward movement of the upper mold base 3, and the upper mold base 3 and the lower mold base 2 are matched as a whole to avoid separation of the upper mold base 3 and the lower mold base 2, which is convenient for matching and replacement. Support seats 101 are fixed on both sides of the bottom of the base 1. The support seats 101 can be used to support and lift the base 1, so as to make space for the guide rods 301 to extend downward when the upper mold base 3 descends, thereby avoiding obstruction and interference.

[0036] Specifically, the lifting and adjusting mechanism 5 includes a pair of columns 51, a suspension 52, a lifting slide 53 and a driving mechanism 54. The two columns 51 are vertically fixed on both sides of the base 1, the suspension 52 is fixed on the top of the two columns 51, the lifting slide 53 is slidably mounted on the two columns 51, and is located below the suspension 52, and the upper mold base 3 is fixed on the lower surface of the lifting slide 53. The driving mechanism 54 is arranged on the suspension 52, and is used to drive the lifting slide 53 to perform lifting and adjustment. Through the operation of the driving mechanism 54, the lifting slide 53 is driven to slide up and down along the columns 51, and then the upper mold base 3 can be driven to move synchronously, and the lifting slide 53 is slidably mounted on the two columns 51, and the two columns 51 are used to provide a limit guide for the lifting of the lifting slide 53, so as to ensure that the lifting process of the lifting slide 53 is smooth and stable enough.

[0037] The driving mechanism 54 includes a rack 541, a gear 544, a worm wheel 545 and a worm 547. A clearance groove 521 is provided on the suspension 52. The rack 541 is fixed to the upper surface of the lifting slide 53 and vertically passes through the clearance groove 521 to extend above the suspension 52. The clearance groove 521 makes room for the arrangement of the rack 541. A pair of first brackets 542 are fixed on the suspension 52. A shaft 543 is rotatably installed between the two first brackets 542. The gear 544 and the worm wheel 545 are fixedly sleeved on the shaft 543. The gear 544 meshes with the rack 541 accordingly. A second bracket 546 is fixed above the lifting slide 53. The worm 547 is rotatably installed on the second bracket 546. The worm 547 meshes with the worm wheel 545 accordingly. A rocker 548 is installed on the end of the worm 547.

[0038] The worm 547 is driven to rotate by shaking the shaking plate 548, and the rotating worm 547 engages with the driving worm wheel 545 and drives the shaft 543 to rotate, thereby driving the gear 544 to rotate, and the rotating gear 544 engages with the driving rack 541 to perform corresponding lifting movement, thereby driving the lifting slide 53 and the upper mold base 3 to rise and fall synchronously, providing stable drive for the lifting adjustment of the upper mold base 3.

[0039] In addition, when the lifting slide 53 and the upper mold base 3 are driven to lift and lower by shaking the rocker 548 to drive the worm 547 to rotate and engage the worm wheel 545 to rotate, the one-way transmission effect of the worm 547 and the worm wheel 545 is utilized to achieve a self-locking effect. When not adjusted, it is ensured that the upper mold base 3 will not be lifted or moved at will, which helps to maintain the state of the upper mold base 3, thereby ensuring that the upper mold base 3 can provide a continuous clamping effect and ensure stability during positioning.

[0040] Specifically, the lower die base 2 and the upper die base 3 are equipped with multiple models, the difference being that the sink groove 201, the first positioning groove 21, the second positioning groove 22, the first receiving hole 23, the second receiving hole 24 on the lower die base 2 and the lower pressing block 31 on the upper die base 3 are different in size, spacing and shape. An assembly groove 11 is provided on the rear side of the base 1. The lower die base 2 is detachably matched and installed in the assembly groove 11 by a first fastening bolt 12. The upper die base 3 is detachably installed under the lifting slide 53 by a second fastening bolt 531. The lower die base 2 is detachably installed in the assembly groove 11 by the first fastening bolt 12, and the upper die base 3 is detachably installed under the lifting slide 53 by the second fastening bolt 531. This facilitates the disassembly and replacement of the lower die base 2 and the upper die base 3 as a whole, so as to replace components of different models to adapt to the processing of capacitors of different models, so that one fixture can be equipped with multiple products, thereby improving the universal effect of the fixture.

[0041] Specifically, a translation adjustment mechanism 6 is provided on the base 1, and the translation adjustment mechanism 6 is used to drive the positioning seats 4 on both sides to translate and adjust to move closer to or away from each other.

[0042] The translation adjustment mechanism 6 includes a bidirectional threaded rod 61, a twist handle 62 and a pair of nut seats 63. A guide groove 601 is provided on the upper surface of the base 1. The bidirectional threaded rod 61 is rotatably installed in the guide groove 601. One end of the bidirectional threaded rod 61 extends through and extends to the outer side of the base 1 and is installed with a twist handle 62. The two nut seats 63 are symmetrically limited and slidably installed on both sides of the guide groove 601, and are threadedly matched on both sides of the bidirectional threaded rod 61. The positioning seats 4 on both sides are installed on the top of the nut seats 63 one by one. By pinching the twist handle 62 and screwing the bidirectional threaded rod 61, the rotating bidirectional threaded rod 61 threads drive the two nut seats 63 to move closer to or away from each other, thereby driving the positioning seats 4 on both sides to move closer to or away from each other to adapt to different types of capacitor housings.

[0043] Specifically, the side positioning seat 4 is equipped with multiple models, which differ in that the spacing, position, size and shape of the positioning pin 41 and the screw hole 42 are different. The side positioning seat 4 is detachably mounted on the top of the nut seat 63 by fastening screws. The side positioning seat 4 is disassembled and replaced with different models, so that different models of capacitor casings can be positioned and fixed, further ensuring the versatility of the clamp.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A new type of positioning fixture, characterized by: It comprises a base (1), a lower die base (2), an upper die base (3), a pair of side positioning bases (4) and a lifting and lowering adjustment mechanism (5); The lower die base (2) is mounted on the rear side of the base (1), and the lower die base (2) is provided with recessed grooves (201) arranged at intervals along its length direction, and each of the recessed grooves (201) is provided with a first positioning groove (21) on its inner bottom wall, and the lower die base (2) is provided with a second positioning groove (22) on one side of the recessed groove (201), and the inner bottom wall surface of the second positioning groove (22) is higher than the inner bottom wall surface of the first positioning groove (21); A first receiving hole (23) is provided at both vertex corners of each of the first positioning grooves (21) and each of the second positioning grooves (22); a second receiving hole (24) is provided on the inner bottom wall of each of the first positioning grooves (21) and each of the second positioning grooves (22); the first receiving hole (23) and the second receiving hole (24) are used to match and accommodate the rivet nuts on the laminated busbar; The lifting and adjusting mechanism (5) is arranged above the base (1), and the upper die seat (3) is arranged directly above the lower die seat (2) through the lifting and adjusting mechanism (5), and the lifting and adjusting mechanism (5) is used to drive the upper die seat (3) to perform lifting and adjusting; A lower pressing block (31) capable of matching and pressing into the sink groove (201) is fixed at a position corresponding to the position of each sink groove (201) on the lower surface of the upper die seat (3); The two side positioning seats (4) are symmetrically arranged above the base (1) and located at the front side of the lower mold base (2) and are used for positioning and assembling the capacitor housing.

2. A novel positioning fixture according to claim 1, characterized in that: A positioning pin (41) extending vertically upward is fixed on the top surface of each of the two side positioning seats (4), and the positioning pin (41) can be inserted into a positioning hole on the capacitor housing in a matching manner; The top surfaces of the two side positioning seats (4) are both provided with screw holes (42), and the screw holes (42) are used for bolting the capacitor housing.

3. A novel positioning fixture according to claim 1, characterized in that: Both sides of the lower die base (2) are provided with vertically penetrating guide holes (202), guide rods (301) are slidably installed in the two guide holes (202), and the upper die base (3) is fixed on the top ends of the two guide rods (301); The bottom ends of the two guide rods (301) are both fixed with anti-drop caps (302), and the diameter of the anti-drop caps (302) is larger than the inner diameter of the guide hole (202); Support seats (101) are respectively fixed on both sides of the bottom of the base (1).

4. A novel positioning fixture according to claim 1, characterized in that: The lifting and adjusting mechanism (5) comprises a pair of uprights (51), a suspension (52), a lifting slide (53) and a driving mechanism (54); The two upright posts (51) are vertically fixed on both sides of the base (1), and the suspension (52) is fixed on the top ends of the two upright posts (51); The lifting slide (53) is slidably mounted on the two upright posts (51) and is located below the suspension (52); The upper die seat (3) is fixed on the lower surface of the lifting slide (53); The driving mechanism (54) is arranged on the suspension (52) and is used to drive the lifting slide (53) to perform lifting and lowering adjustments.

5. A new positioning fixture according to claim 4, characterized in that: The driving mechanism (54) comprises a rack (541), a gear (544), a worm wheel (545) and a worm (547); The suspension (52) is provided with a clearance groove (521), and the rack (541) is fixed on the upper surface of the lifting slide (53) and vertically passes through the clearance groove (521) and extends to the top of the suspension (52); A pair of first brackets (542) are fixed on the suspension (52), a shaft (543) is rotatably mounted between the two first brackets (542), the gear (544) and the worm gear (545) are both fixedly sleeved on the shaft (543), and the gear (544) is correspondingly meshed with the rack (541); A second bracket (546) is fixed above the lifting slide (53), and the worm (547) is rotatably mounted on the second bracket (546), and the worm (547) is correspondingly meshed with the worm wheel (545); A rocking plate (548) is mounted on the end of the worm (547).

6. A novel positioning fixture according to claim 4, characterized in that: The lower die base (2) and the upper die base (3) are provided with a plurality of models; The base (1) is provided with an assembly groove (11) at the rear side, and the lower die base (2) is detachably mounted in the assembly groove (11) by means of a first fastening bolt (12); The upper die seat (3) is detachably mounted below the lifting slide (53) via a second fastening bolt (531).

7. A novel positioning fixture according to claim 1, characterized in that: The base (1) is provided with a translation adjustment mechanism (6), and the translation adjustment mechanism (6) is used to drive the two side positioning seats (4) to translate and adjust to move closer to or farther from each other.

8. A new positioning fixture according to claim 7, characterized in that: The translation adjustment mechanism (6) comprises a bidirectional threaded rod (61), a twist handle (62) and a pair of nut seats (63); The upper surface of the base (1) is provided with a guide groove (601), and the bidirectional threaded rod (61) is rotatably installed in the guide groove (601); One end of the bidirectional threaded rod (61) extends through the outer side of the base (1) and is mounted with the twist handle (62); The two nut seats (63) are symmetrically and slidably mounted on both sides of the guide groove (601) and are thread-matchedly mounted on both sides of the bidirectional threaded rod (61); The two side positioning seats (4) are mounted on the top of the nut seat (63) in a one-to-one correspondence.

9. A novel positioning fixture according to claim 8, characterized in that: The side positioning seat (4) is provided with a plurality of models, and the side positioning seat (4) is detachably mounted on the top of the nut seat (63) by means of a fastening screw.

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