A horizontal milling jig for caliper large circular arc machining

Abstract

The utility model provides a kind of for caliper big circular arc processing's horizontal milling jig, including base, jig assembly, side edge oil cylinder component, front push oil cylinder component, rear end pressure rod component and upper support oil cylinder component.Base forms jig area;Jig assembly is detachably fixed in jig area, including bottom plate, a pair of positioning mechanism and a pair of supporting mechanism, the positioning shaft of positioning mechanism is inserted into caliper positioning hole, supporting mechanism supports caliper positioning notch to position caliper;The pressure rod mechanism of side edge oil cylinder component rotates and presses down and tight caliper mounting lug;Front push oil cylinder of front push oil cylinder component is from positioning shaft front side and tight mounting lug;The pressure rod mechanism of rear end pressure rod component rotates and presses down assembly groove to tight caliper rear end;Upper push oil cylinder of upper support oil cylinder component is from positioning shaft underside and tight mounting lug.The utility model is strong in universality, can be adapted to multiple specifications caliper, and processing stability is good, can improve product pass rate, shorten production cycle, reduce cost.

Description

Technical Field

[0001] This utility model relates to the technical field of a horizontal milling fixture for machining large circular arcs with calipers. Background Technology

[0002] In vehicle braking systems, the caliper of a disc brake system is one of the core components for achieving braking function, and its manufacturing precision and performance stability are directly related to vehicle driving safety. Calipers are usually manufactured by molding and then machining each part to meet specified tolerances. The horizontal milling fixture, as a key piece of equipment in the caliper machining process, plays a vital role in achieving efficient production.

[0003] like Figure 1 , 2 As shown, the caliper in a disc brake system used in a vehicle generally includes an inner support leg a, an outer support leg b, and a bridging component c that integrally connects the inner support leg a and the outer support leg b. The inner support leg a has a piston hole d, configured to accommodate a piston (not shown) that can be braked by hydraulic pressure, a motor, and / or a rod. The outer support leg b forms two symmetrically protruding finger-like structures e, with a mounting groove f between the two finger-like structures e that faces the piston hole d. Two positioning slots g are provided on the back of the two finger-like protrusions e for positioning. The inner support leg has mounting lugs h extending symmetrically outward from both sides, with mounting holes i formed at the ends of the mounting lugs h for installing the brake caliper inside the vehicle for operation.

[0004] In the machining of calipers, the horizontal milling fixture is one of the key pieces of equipment for achieving efficient production. However, existing caliper fixture assemblies typically only fix the mounting holes i and positioning slots g of the caliper mounting lug h, leaving many problems that urgently need to be solved:

[0005] First, existing large circular arc horizontal milling fixtures are limited by their structural space design and can only be adapted to products within a specific size range. When the size of the processed product changes, the fixture cannot be adjusted or adapted to achieve compatibility, requiring the replacement of the entire fixture set to meet production needs, resulting in low versatility.

[0006] Secondly, poor machining stability directly affects product quality stability. In actual milling processes, existing fixtures lack structural stability, easily causing vibration or positioning deviations. This leads to significant fluctuations in key indicators such as dimensional accuracy and surface roughness of the machined products, making it difficult to consistently meet customer quality requirements. This not only reduces the product pass rate but also introduces additional quality risks to subsequent processes. For example, defective semi-finished products may lead to decreased assembly accuracy in later stages or require more manpower for screening and rework, further impacting production continuity.

[0007] Furthermore, the combination of the aforementioned problems will trigger a series of production efficiency and cost issues. High product scrap rates due to unstable quality not only waste raw materials but also reduce the production enthusiasm of operators. Simultaneously, frequent fixture changes and complex rework processes significantly extend the product production cycle, preventing the production line from achieving rapid and efficient mass production. These problems ultimately translate into additional consumption of human, material, and time costs, leading to an increase in overall product costs. This contradicts the company's lean production plans and, in the long run, will weaken the company's cost advantage in market competition, adversely affecting its sustainable development.

[0008] In view of this, the inventor has specifically designed a horizontal milling fixture for machining large circular arcs with calipers, and this invention arises from this. Utility Model Content

[0009] To solve the above problems, the technical solution of this utility model is as follows:

[0010] A horizontal milling fixture for machining large circular arcs with calipers, comprising:

[0011] A base on which a fixture area is formed;

[0012] The fixture assembly is detachably fixed in the fixture area and includes a base plate, a pair of positioning mechanisms and a pair of support mechanisms. The two positioning mechanisms are symmetrically arranged and each has a positioning shaft for inserting into the caliper positioning hole. The two support mechanisms are used to support the caliper positioning slot so that the entire caliper is positioned on the fixture assembly.

[0013] The side cylinder assembly, located on the base and outside the positioning mechanism, has a rotatable and press-down lever mechanism for rotating and pressing down to press the mounting lug of the caliper onto the positioning shaft.

[0014] The push assembly, located on the base and in front of the fixture area, includes two corresponding positioning shafts and adjustable push cylinders for pushing the mounting lugs onto the positioning mechanism from the front of the positioning shafts.

[0015] The rear pressure bar assembly, located on the base and behind the fixture area, has another rotatable and downward pressure bar mechanism for rotating and pressing down the mounting slot to press the rear end of the caliper onto the support structure.

[0016] The upper support cylinder assembly, located below the positioning shaft, includes two upward push cylinders used to press the mounting lugs of the caliper against the positioning shaft from below.

[0017] Preferably, the side cylinder assembly includes a left cylinder assembly and a right cylinder assembly, and is respectively located on the outside of the two positioning mechanisms.

[0018] Preferably, the positioning mechanism includes a base, a mounting block, and a positioning shaft. The upper end of the base is provided with a first connecting hole, and the mounting block is provided with a plurality of second connecting holes that cooperate with the first connecting hole. The positioning shaft is detachably fixed to the side of the mounting block away from the base.

[0019] Preferably, the support mechanism is columnar and vertically mounted on the base plate, with the upper end of the support mechanism forming an inwardly tapered section whose diameter gradually decreases, and the top of the inwardly tapered section forming a support plane.

[0020] Preferably, two first clearance grooves are provided through the base plate and directly below the two positioning shafts, and two second clearance grooves are provided on the base accordingly. The main body of the push cylinder passes through the first clearance grooves and the corresponding second clearance grooves.

[0021] Preferably, the output ends of both the forward-pushing cylinder and the upward-pushing cylinder are provided with a first pressure block.

[0022] Preferably, the left cylinder assembly, the right cylinder assembly, and the rear pressure rod assembly each include a mounting seat on the base, a pressing cylinder on the mounting seat, and a pressure rod mechanism. The mounting seat and the cylinder pad are provided with a mounting groove for fitting and mounting the pressing cylinder. A hinge seat is provided on one side of the output shaft of the pressing cylinder. The pressure rod mechanism includes a pressing arm and two hinge plates. The lower ends of the two hinge plates are pivotally connected to the hinge seat, and their upper ends are pivotally connected to the rear side of the pressing arm. The rear end of the pressing arm is pivotally connected to the top of the output shaft of the pressing cylinder, and its front end extends to the outside of the pressing cylinder.

[0023] Preferably, a second pressure block is detachably fixed to the lower front end of the lower pressure arm.

[0024] Preferably, the base has a mounting plate on the front side, and the mounting plate has several transverse adjustment grooves distributed along the length of the base. The two forward-pushing cylinders are detachably fixed to the extension direction of the transverse adjustment grooves by locking components.

[0025] Preferably, the mounting plate is provided with vertically distributed vertical adjustment grooves, and the mounting plate is locked to the front side of the base by a positioning member passing through the adjustment grooves.

[0026] The beneficial effects of this utility model are as follows:

[0027] This utility model, by adapting to the original fixture components, adds a side cylinder assembly, a front push assembly, a rear pressure rod assembly, and an upper support cylinder assembly. By using the controllable stroke cylinder and pressure rod mechanism, the original fixed position of the caliper is strengthened and fixed in all directions, which can adapt to the handling of caliper products of various specifications and has strong versatility.

[0028] In addition, the jig components and caliper products can be picked up and put down as a whole by simply loosening the hydraulic cylinder and loosening the screws, which can effectively shorten the product switching time and improve the switching efficiency.

[0029] In addition, the fully reinforced caliper can perform horizontal milling operations stably, reducing caliper jitter and deviation during the horizontal milling process, thus significantly reducing scrap rate and product abnormalities, and saving production costs.

[0030] In summary, this utility model utilizes a novel caliper large-circle machining horizontal milling fixture, which can meet the production needs of caliper products of different specifications, and can quickly produce qualified products with high quality and high efficiency; it can not only enhance the operator's satisfaction, but also save on fixture manufacturing costs. Attached Figure Description

[0031] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0032] in:

[0033] Figure 1 This is one of the structural diagrams of calipers in the prior art;

[0034] Figure 2 This is the second schematic diagram of the caliper structure in the existing technology;

[0035] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0036] Figure 4 This is one of the partial exploded structural diagrams of the jig assembly in this utility model;

[0037] Figure 5 This is the second schematic diagram showing the partial exploded structure of the fixture components in this utility model;

[0038] Figure 6 This is a structural schematic diagram illustrating the usage state of the fixture components in this utility model;

[0039] Figure 7 This is a partial structural schematic diagram highlighting the side cylinder assembly and the rear pressure rod assembly in this utility model;

[0040] Figure 8 This is the second schematic diagram showing the partial exploded structure of the fixture components in this utility model;

[0041] Figure 9 This is a partial structural schematic diagram highlighting the pressure bar mechanism in this utility model;

[0042] Figure 10This is a partial exploded structural diagram of the pressure bar mechanism in this utility model;

[0043] Figure 11 This is a partial structural schematic diagram highlighting the upper support cylinder assembly in this utility model;

[0044] Figure 12 yes Figure 11 A magnified schematic diagram of a portion of region A in the middle.

[0045] Label Explanation:

[0046] 100. Base; 110. Strip hole; 120. Round hole; 130. Mounting plate; 131. Horizontal adjustment groove; 132. Vertical adjustment groove; 140. Connecting block; 141. Third connecting hole; 150. Second clearance groove; 200. Fixture assembly; 210. Base plate; 211. First clearance groove; 220. Positioning mechanism; 221. Base; 222. Mounting block; 223. Positioning shaft; 224. Second connecting hole; 230. Support mechanism; 231. Retracted section; 232. Support plane; 300. Side cylinder assembly 310. Left cylinder assembly; 320. Right cylinder assembly; 330. Mounting base; 340. Downward pressing cylinder; 341. Hinge seat; 342. First hinge hole; 343. Pivot shaft; 350. Pressing rod mechanism; 351. Downward pressing arm; 352. Hinge plate; 353. Rotating shaft; 354. Second hinge hole; 355. Locking hole; 360. Second pressing block; 400. Front pushing assembly; 410. Front pushing cylinder; 420. First pressing block; 500. Rear pressing rod assembly; 600. Upper support cylinder assembly; 610. Upward pushing cylinder. Detailed Implementation

[0047] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0048] Please see Figures 1 to 12 This is a preferred embodiment of the present invention, a horizontal milling fixture for machining large circular arcs with calipers, comprising a base 100, a fixture assembly 200, a side cylinder assembly 300, a front push assembly 400, a rear pressure rod assembly 500, and an upper support cylinder assembly 600, wherein:

[0049] The base 100 is square plate-shaped, and a fixture area for locking and fixing the fixture assembly 200 is formed thereon.

[0050] In this embodiment, the jig area of ​​the base 100 is provided with transverse and longitudinal strip holes 110 and several fixed circular holes 120, so as to correspond to jig components 200 of different types and sizes, so that they can be stably and conveniently locked and fixed in the jig area of ​​the base 100.

[0051] like Figure 4 , 5 As shown, the fixture assembly 200 is detachably fixed in the fixture area and includes a base plate 210, a pair of positioning mechanisms 220 and a pair of support mechanisms 230. The two positioning mechanisms 220 are symmetrically arranged and each has a positioning shaft 223 for inserting into the caliper positioning hole. The two support mechanisms 230 are used to support the caliper positioning slot g so that the entire caliper is positioned on the fixture assembly 200.

[0052] In this embodiment, the positioning mechanism 220 includes a base 221, a mounting block 222 and a positioning shaft 223. The upper end of the base 221 is provided with a first connecting hole (not shown in the figure), and the mounting block 222 is provided with a plurality of second connecting holes 224 that cooperate with the first connecting hole. The positioning shaft 223 is detachably fixed to the side of the mounting block 222 away from the base 221.

[0053] Thus, the position of the positioning shaft 223 can be adjusted by the multiple second connecting holes 224 on the mounting block 222 in conjunction with the first connecting hole of the base 221, adapting to the positioning hole spacing of different caliper sizes.

[0054] In this embodiment, the support mechanism 230 is columnar and vertically mounted on the base plate 210. The upper end of the support mechanism 230 forms an inwardly tapered section 231 with a gradually decreasing diameter, and the top of the inwardly tapered section 231 forms a support plane 232.

[0055] Therefore, by making the upper end of the columnar support mechanism 230 into an inwardly tapered section 231 with a gradually decreasing diameter, and forming a small support plane 232 at the top of the inwardly tapered section 231, the contact position of the support mechanism 230 can be maximized to fit an approximately point-like minimal contact surface. The positioning slot g on the caliper is generally also in the form of a curved surface, so that the support structure can be adapted to more positioning slot g shapes, all of which can achieve stable support. In conjunction with other limiting structures, stable limiting of the position of the outer leg b of the caliper can be achieved.

[0056] like Figure 7 , 8 As shown, the side cylinder assembly 300 is mounted on the base 100 and located outside the positioning mechanism 220. It has a rotatable and press-down lever mechanism 350 for rotating and pressing down to press the mounting lug h of the caliper onto the positioning shaft 223.

[0057] In this embodiment, the side cylinder assembly 300 includes a left cylinder assembly 310 and a right cylinder assembly 320, which are respectively located on the outside of the two positioning mechanisms 220.

[0058] like Figure 7 , 8 As shown, the rear pressure bar assembly 500 is mounted on the base 100 and located on the rear side of the fixture area. It has another rotatable and press-down pressure bar mechanism 350 for rotating and pressing down the mounting groove f to press the rear end of the caliper onto the support structure.

[0059] Specifically, the left cylinder assembly 310, the right cylinder assembly 320, and the rear pressure rod assembly 500 all include a mounting base 330 on the base 100, a pressing cylinder 340 on the mounting base 330, and a pressure rod mechanism 350.

[0060] The mounting base 330 has a vertical through-hole in the middle forming a mounting groove (not shown in the figure) for fitting and mounting the pressing cylinder 340. The output shaft of the pressing cylinder 340 is provided with a hinge seat 341. The pressure rod mechanism 350 includes a long strip-shaped pressing arm 351 and two long plate-shaped hinge plates 352. The lower ends of the two hinge plates 352 are pivotally connected to the hinge seat 341 through the same rotating shaft 353, and their upper ends are pivotally connected to the rear side of the pressing arm 351 through another rotating shaft 353. The rear end of the pressing arm 351 is pivotally connected to the top of the output shaft of the pressing cylinder 340, and its front end extends to the outside of the pressing cylinder 340.

[0061] Specifically, in this embodiment, a first hinge hole 342 is provided through the hinge seat 341, and the lower ends of the two hinge plates 352 are pivotally connected to both sides of the first hinge hole 342 through the same rotating shaft 353. A second hinge hole 354 is provided through the middle rear position of the pressing arm 351, and the upper ends of the two hinge plates 352 are pivotally connected to both sides of the second hinge hole 354 through another rotating shaft 353. A pivot shaft 343 is provided at the upper end of the output shaft of the pressing cylinder 340, and the rear end of the pressing arm 351 is pivotally connected to the pivot shaft 343. Thus, by extending and retracting the pressing cylinder 340, the front end of the pressing arm 351 can swing up and down within a certain range, thereby achieving the pressing or releasing of the mounting lug h or the assembly groove f.

[0062] In this embodiment, a second pressure block 360 is detachably fixed to the lower front end of the lower pressure arm 351. The second pressure block 360 is locked and fixed to the lower front end of the lower pressure arm 351 through a locking hole 355 opened at the front end of the lower pressure arm 351, thereby facilitating the pressing of the caliper surface to be pressed.

[0063] like Figure 3 , 4As shown in Figures 11 and 12, the push assembly 400 is mounted on the base 100 and located in front of the fixture area. It includes two corresponding positioning shafts 223 and adjustable push cylinders 410, which are used to push the mounting lug h onto the positioning mechanism 220 from the front of the positioning shafts 223.

[0064] Specifically, a mounting plate 130 is provided on the front side of the base 100. Four transverse adjustment grooves 131, which are elongated and distributed along the length of the base 100, are symmetrically distributed on both sides of the mounting plate 130. Two front push cylinders 410 are detachably fixed to the extension direction of the transverse adjustment grooves 131 by locking bolts (not shown in the figure), thereby enabling the front push cylinders 410 to slide and be fixed in the length direction of the base 100.

[0065] In addition, the mounting plate 130 is provided with vertically distributed vertical adjustment grooves 132 on both sides and in the middle. The mounting plate 130 is locked and fixed to the front side of the base 100 by a positioning member passing through the vertical adjustment groove 132. In this embodiment, the positioning member is a locking bolt, and a connecting block 140 is locked and fixed to the front side wall of the base 100. A third connecting hole 141 is opened on the connecting block 140 along its vertical direction. The positioning member is threadedly engaged with the third connecting hole 141. Thus, by loosening the three positioning members, the height of the mounting plate 130 can be adjusted vertically, thereby adjusting the height of the output shaft of the front push assembly 400. With the lateral adjustment of the front push cylinder 410, the position of the output shaft of the front push cylinder 410 can always be adjusted to the position corresponding to the caliper mounting lug h of the corresponding size, and finally the front push cylinder 410 pushes and fixes the caliper mounting lug h.

[0066] like Figure 11 , 12 As shown, the upper support cylinder assembly 600 is located below the positioning shaft 223 and includes two upward push cylinders 610, which are used to press the mounting lug h of the caliper against the positioning shaft 223 from the lower side of the positioning shaft 223.

[0067] In this embodiment, combined with Figure 4 Two first clearance grooves 211 are provided on the base plate 210 and directly below the two positioning shafts 223. Two second clearance grooves 150 are provided on the base 100. The main body of the push cylinder 610 passes through the first clearance grooves 211 and the corresponding second clearance grooves 150. The upper end of the push cylinder 610 forms a fixing plate covering the first clearance grooves 211. The push cylinder 610 is locked and fixed on the base plate 210 by the fixing plate. At this time, the output shaft of the push cylinder 610 is exactly opposite to the lower end of the mounting hole i on the mounting lug h.

[0068] In this embodiment, the output ends of both the forward push cylinder 410 and the upward push cylinder 610 are provided with a first pressure block 420.

[0069] In this embodiment, the first pressing block 420 and the second pressing block 360 can be selected as flexible pressing blocks or metal pressing blocks, such as rubber pressing blocks or alloy pressing blocks, depending on the specific situation. No restrictions are imposed here.

[0070] The beneficial effects of this utility model are as follows:

[0071] This utility model adapts to the original fixture assembly 200 by adding a side cylinder assembly 300, a front push assembly 400, a rear pressure rod assembly 500, and an upper support cylinder assembly 600. By using the controllable stroke cylinder and pressure rod mechanism 350, the original fixed position of the caliper is strengthened and fixed in all directions, which can adapt to the handling of various caliper products and has strong versatility.

[0072] In addition, the jig assembly 200 and caliper products can be picked up and put down as a whole by simply loosening the hydraulic cylinder and loosening the screws, which can effectively shorten the product switching time and improve the switching efficiency.

[0073] In addition, the fully reinforced caliper can perform horizontal milling operations stably, reducing caliper jitter and deviation during the horizontal milling process, thus significantly reducing scrap rate and product abnormalities, and saving production costs.

[0074] In summary, this utility model utilizes a novel caliper large-circle machining horizontal milling fixture, which can meet the production needs of caliper products of different specifications, and can quickly produce qualified products with high quality and high efficiency; it can not only enhance the operator's sense of well-being, but also save on fixture manufacturing costs.

[0075] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A horizontal milling fixture for machining large circular arcs with calipers, characterized in that, include: A base (100) on which a fixture area is formed; The fixture assembly (200) is detachably fixed in the fixture area and includes a base plate (210), a pair of positioning mechanisms (220) and a pair of support mechanisms (230). The two positioning mechanisms (220) are symmetrically arranged and each has a positioning shaft (223) for inserting into the caliper positioning hole. The two support mechanisms (230) are used to support the caliper positioning slot so that the entire caliper is positioned on the fixture assembly (200). The side cylinder assembly (300), located on the base (100) and outside the positioning mechanism (220), has a rotatable pressing rod mechanism (350) for rotating and pressing down to press the mounting lug of the caliper onto the positioning shaft (223); The push assembly (400) is located on the base (100) and in front of the fixture area. It includes two corresponding positioning shafts (223) and adjustable push cylinders (410) for pushing the mounting lugs onto the positioning mechanism (220) from the front of the positioning shafts (223). The rear pressure bar assembly (500), located on the base (100) and on the rear side of the fixture area, has another rotatable pressure bar mechanism (350) for rotating and pressing down the mounting slot to press the rear end of the caliper onto the support structure; The upper support cylinder assembly (600) is located below the positioning shaft (223) and includes two push cylinders (610) for pressing the mounting lugs of the caliper against the positioning shaft (223) from the lower side of the positioning shaft (223).

2. A horizontal milling fixture for machining large circular arcs with calipers according to claim 1, characterized in that, The side cylinder assembly (300) includes a left cylinder assembly (310) and a right cylinder assembly (320), which are respectively located on the outside of the two positioning mechanisms (220).

3. A horizontal milling fixture for machining large circular arcs with calipers according to claim 1, characterized in that, The positioning mechanism (220) includes a base (221), a mounting block (222) and a positioning shaft (223). The base (221) has a first connecting hole at its upper end. The mounting block (222) has a plurality of second connecting holes (224) that cooperate with the first connecting hole. The positioning shaft (223) is detachably fixed to the side of the mounting block (222) away from the base (221).

4. A horizontal milling fixture for machining large circular arcs with calipers according to claim 1, characterized in that, The support mechanism (230) is columnar and vertically mounted on the base plate (210). The upper end of the support mechanism (230) forms an inwardly tapered section (231) with a gradually decreasing diameter, and the top of the inwardly tapered section (231) forms a support plane (232).

5. A horizontal milling fixture for machining large circular arcs with calipers according to claim 1, characterized in that, Two first clearance grooves are provided on the base plate (210) and directly below the two positioning shafts (223). Two second clearance grooves are provided on the base (100). The main body of the push cylinder (610) passes through the first clearance grooves and the corresponding second clearance grooves.

6. A horizontal milling fixture for machining large circular arcs with calipers according to claim 1, characterized in that, The output ends of both the forward push cylinder (410) and the upward push cylinder (610) are provided with a first pressure block (420).

7. A horizontal milling fixture for machining large circular arcs with calipers according to claim 2, characterized in that, The left cylinder assembly (310), the right cylinder assembly (320), and the rear pressure rod assembly (500) all include a mounting seat (330) on the base (100), a pressing cylinder (340) on the mounting seat (330), and a pressure rod mechanism (350). The mounting seat (330) and the cylinder pad are provided with mounting grooves for fitting and mounting the pressing cylinder (340). The output shaft of the pressing cylinder (340) is provided with a hinge seat (341). The pressure rod mechanism (350) includes a pressing arm (351) and two hinge plates (352). The lower ends of the two hinge plates (352) are pivotally connected to the hinge seat (341), and their upper ends are pivotally connected to the rear side of the pressing arm (351). The rear end of the pressing arm (351) is pivotally connected to the top of the output shaft of the pressing cylinder (340), and its front end extends to the outside of the pressing cylinder (340).

8. A horizontal milling fixture for machining large circular arcs with calipers according to claim 7, characterized in that, The lower front end of the lower pressure arm (351) is detachably fixed with a second pressure block (360).

9. A horizontal milling fixture for machining large circular arcs with calipers according to claim 1, characterized in that, The base (100) has a mounting plate (130) on its front side. The mounting plate (130) has several transverse adjustment grooves (131) distributed along the length of the base (100). The two forward-pushing cylinders (410) are detachably fixed to the extension direction of the transverse adjustment grooves (131) by locking components.

10. A horizontal milling fixture for machining large circular arcs with calipers according to claim 9, characterized in that, The mounting plate (130) is provided with vertical adjustment grooves (132) distributed along the vertical direction. The mounting plate (130) is locked and fixed to the front side of the base (100) by a positioning member passing through the adjustment groove.

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