Forge piece finished product size detection device

Abstract

The invention relates to the technical field of forge piece detection, and discloses a forge piece finished product size detection device which comprises a base, a detection table and a height adjusting frame are fixedly installed on the base, an open type containing groove is formed in the bottom of the detection table, a plurality of detection blocks which are circumferentially and evenly distributed are slidably arranged on the upper portion of the detection table, and limiting columns are arranged at the bottoms of the detection blocks. A positioning detection mechanism for driving the limiting columns to synchronously move back and forth towards the center of the detection table is arranged in the placement groove, a mounting groove is reserved in the detection block, a sleeve is arranged in the mounting groove, and a flaw detection unit is arranged in the sleeve. Compared with the prior art, the device has the beneficial effects that size deviation detection can be carried out on different casting parts for multiple times; the positioning detection mechanism can be used for synchronously measuring the outer walls of a plurality of circular pipe castings, and can be matched with the flaw measuring unit to measure the outer diameter sizes and size deviation values of a plurality of parts; and the flaw detecting unit can quickly obtain the dimensional deviation value among a plurality of parts of the round pipe casting by simply rotating the knob.

Description

Technical Field

[0001] The invention relates to the technical field of forging detection, and in particular to a device for detecting the size of a finished forging. Background Art

[0002] The finished forging size detection device is a device used to measure and detect the size of the finished forging. In the forging process, the dimensional accuracy of the forging has an important influence on the quality and performance of the product. Therefore, in order to ensure that the size of the forging meets the design requirements, dimensional detection is required.

[0003] Traditional forging size detection usually uses manual measurement, which makes it difficult to ensure the accuracy and stability of the measurement. In particular, when performing size detection on round steel pipe castings, it is necessary to measure the inner and outer diameters of the pipe wall to measure the thickness of the pipe wall. When measuring the inner and outer diameters of the pipe wall, since the pipe wall is curved, when defective castings appear, the thickness of the round pipe wall varies. Traditional detection devices do not have a structure for simultaneous size detection of multiple pipe walls of round pipe castings. It is impossible to measure whether the thickness of the round pipe casting wall is uniform, nor can it measure the specific error value. Therefore, the detection result is not accurate enough and there are certain limitations when using it. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a device for detecting the size of finished forgings.

[0005] In order to solve the above technical problems, the present invention provides a technical solution as follows: a device for detecting the size of a finished forging, comprising a base, on which a detection table and a height adjustment frame are fixedly mounted; The bottom of the testing platform is provided with an open placement groove, and a plurality of detection blocks evenly distributed in a circumference are slidably provided on the upper part. A limit column is provided at the bottom of the detection block, and a positioning detection mechanism is provided in the placement groove to drive the limit column to move back and forth synchronously toward the center of the testing platform. An installation groove is reserved on the detection block, and a sleeve is provided in the installation groove, and a defect detection unit is provided in the sleeve; The height adjustment frame is provided with a sliding groove, a threaded rod is rotatably arranged in the sliding groove, the threaded rod passes through the height adjustment frame and is transmission-connected to the first stepper motor, a mounting bracket threadedly connected to the threaded rod is arranged in the sliding groove, the second stepper motor is installed on the mounting bracket, and the output shaft of the second stepper motor is fixedly connected to a rotating tensioning and fixing mechanism.

[0006] As an improvement, the positioning detection mechanism includes a rotating drum which is rotatably connected to the bottom surface of the detection platform and is located in the placement groove. A turntable is fixed on the top of the rotating drum. A plurality of limit grooves corresponding to the limit columns are reserved on the top surface of the turntable. A connecting block which is slidably provided in the limit groove and is cooperated with the limit columns is provided. A pair of fixed blocks are provided at the bottom end of the detection platform. A rotating rod 1 is provided in the middle of the fixed blocks to rotate together. A worm gear which is sleeved and fixed on the rotating rod 1 is provided between the opposite side surfaces. A worm wheel which meshes with the worm gear is sleeved and fixed on the bottom of the rotating drum. The rotating rod 1 passes through the fixed block and is connected to the stepping motor 3 arranged on the base.

[0007] As an improvement, the limit groove is arranged on the turntable inclined to the sliding direction of the detection block, and connected installation grooves are reserved on the left and right sides of the cylinder wall at the bottom end of the detection platform. A fixed block is installed and fixed in the installation groove, and a scale line 1 close to the detection block is provided on the top surface of the detection platform.

[0008] As an improvement, the defect detection unit includes a slide cylinder slidably arranged in the sleeve, a telescopic spring is connected between one end of the slide cylinder close to the outer wall of the detection platform and the mounting groove, a detection rod is provided at the other end, which passes through the detection block and is slidably connected thereto, two scale lines are provided on the top of the detection rod, and two rotating rods are rotatably arranged in the middle of the slide cylinder, a column head is provided at one end of the rotating rod close to the detection rod, and a rotating knob is provided at the other end after passing through the slide cylinder and the detection block, and the two rotating rods are slidably connected to the slide cylinder and rotatably connected to the detection block, a pair of arc-shaped transmission plates symmetrically distributed on the circumferential outer wall of the column head is provided, and a pair of rotating columns slidably matched with the lower side of the arc-shaped transmission plates are provided on the circumferential inner wall of the slide cylinder.

[0009] As an improvement, the arc-shaped transmission plate spirally extends from the top surface of the column head to the bottom surface of the column head, the number of spiral turns of the arc-shaped transmission plate is two-fifths of a turn, a pair of swivel seats rotatably connected to the rotating column are fixed on the circumferential inner wall of the slide cylinder, and a swivel groove slidably connected to the rotating column is reserved at the bottom end of the arc-shaped transmission plate.

[0010] As an improvement, the rotary tensioning and fixing mechanism includes a cross connecting plate fixedly connected to the output shaft of stepper motor 2, and an internal threaded cylinder is provided on the bottom surface of the cross connecting plate. A connecting slide is provided on the circumferential inner wall of the internal threaded cylinder, and a connecting screw is connected to its internal thread. A rotating handle is provided after the connecting screw passes through the connecting slide, and the connecting screw is rotatably connected to the connecting slide.

[0011] As an improvement, movable grooves are reserved on the four arms of the cross connecting plate, and a telescopic block is slidably connected in the movable groove. The telescopic block is bent downward and extended to provide an inner support plate. A number of connecting arms are provided on the circumferential outer wall of the connecting slide cylinder, and hinge plates are hinged to the upper and lower ends of the inner side of the inner support plate and the upper and lower ends of the connecting arm.

[0012] As an improvement, a semicircular inner support rod is provided on the outer side surface of the inner support plate, and the top surfaces of the four supporting arms of the cross connecting plate are provided with scale lines three perpendicular to the moving groove.

[0013] The beneficial effects of the present invention compared with the prior art are: 1. A rotating tensioning and fixing mechanism is set up to measure the inner diameter of the round tube while fixing the round tube casting. The casting can also be rotated by stepper motor 2, and the dimensional deviation of different casting parts can be detected multiple times; 2. The positioning detection mechanism can synchronously measure the outer wall of multiple round tube castings. In conjunction with the defect detection unit, it can measure the outer diameter dimensions and dimensional deviation values ​​of multiple parts. The measurement results are diverse and more valuable for reference. 3. The defect detection unit can drive the detection rod to extend out of the detection block by simply rotating the knob. By reading the scale line 2 on the detection rod, the dimensional deviation values ​​between multiple parts of the round tube casting can be quickly obtained. It is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the appearance of a device for detecting the size of a finished forging according to the present invention.

[0015] Figure 2 It is an exploded schematic diagram of a device for detecting dimensions of finished forgings of the present invention.

[0016] Figure 3 It is a cross-sectional view of a device for detecting the size of a finished forging according to the present invention.

[0017] Figure 4 It is an exploded schematic diagram of a positioning detection mechanism of a forging finished product size detection device of the present invention.

[0018] Figure 5 The invention is a forging finished product size detection device Figure 3 An enlarged schematic diagram of point A.

[0019] Figure 6 It is an exploded schematic diagram of a defect detection unit of a forging finished product size detection device of the present invention.

[0020] Figure 7 The invention is a forging finished product size detection device Figure 3 An enlarged schematic diagram of point B.

[0021] Figure 8 The invention is a forging finished product size detection device Figure 6 Enlarged schematic diagram of point C.

[0022] Fig. 9 It is a schematic diagram of some components of a defect detection unit of a finished forging size detection device of the present invention.

[0023] Fig.10 It is a cross-sectional view of a defect detection unit of a forging finished product size detection device of the present invention.

[0024] Fig.11 The invention is a forging finished product size detection device Fig.10 An enlarged schematic diagram of point D.

[0025] Fig.12 The present invention is a schematic diagram of the structural composition of a rotating tensioning and fixing mechanism of a forging finished product size detection device.

[0026] Fig.13 It is an exploded schematic diagram of a rotary tensioning and fixing mechanism of a forging finished product size detection device of the present invention.

[0027] Fig.14 It is a cross-sectional view of a rotating tensioning and fixing mechanism of a forging finished product size detection device of the present invention.

[0028] As shown in the figure: 1. Base; 2. Testing table; 3. Height adjustment frame; 31. Slide; 32. Threaded rod; 4. Testing block; 41. Limiting column; 42. Mounting slot; 43. Sleeve; 44. Defect detection unit; 441. Slide; 442. Telescopic spring; 443. Testing rod; 444. Rotating rod 2; 445. Column head; 446. Turning knob; 447. Arc transmission plate; 448. Rotating column; 449. Rotating seat; 5. Positioning detection mechanism; 51. Rotating cylinder; 52. Rotating disk; 53. Limiting slot; 54. Connecting block; 5 5. Fixing block; 56. Rotating rod one; 57. Worm; 58. Worm wheel; 59. Stepping motor three; 6. Stepping motor one; 7. Mounting bracket; 8. Stepping motor two; 9. Rotating tensioning and fixing mechanism; 91. Cross connecting plate; 92. Internal threaded cylinder; 93. Connecting slide cylinder; 94. Connecting screw; 95. Turning handle; 96. Moving groove; 97. Telescopic block; 98. Inner support plate; 99. Connecting arm; 910. Hinge plate; 911. Inner support rod; 10. Scale line one; 11. Scale line two; 12. Scale line three. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] Combined with Figure 1 , Attachment Figure 2 As shown, a forging finished product size detection device comprises a base 1, on which a detection platform 2 and a height adjustment frame 3 are fixedly mounted; the bottom of the detection platform 2 is provided with an open placement groove, and a plurality of detection blocks 4 evenly distributed in a circumference are slidably arranged on the upper part, a limit column 41 is arranged at the bottom of the detection block 4, and a positioning detection mechanism 5 is arranged in the placement groove to drive the limit column 41 to move back and forth synchronously toward the center of the detection platform 2, and a mounting groove 42 is reserved on the detection block 4, a sleeve 43 is arranged in the mounting groove 42, and a flaw detection unit 44 is arranged in the sleeve 43; The height adjustment frame 3 is provided with a slide groove 31, in which a threaded rod 32 is rotatably arranged, and the threaded rod 32 passes through the height adjustment frame 3 and is transmission-connected to a stepper motor 6, and in the slide groove 31 there is provided a mounting bracket 7 threadedly connected to the threaded rod 32, and a stepper motor 8 is mounted on the mounting bracket 7, and a rotating tensioning and fixing mechanism 9 is fixedly connected to the output shaft of the stepper motor 8.

[0031] The working principle of the present invention is as follows: when it is necessary to inspect the size of a circular steel pipe casting, the inner ring of the forging is tightened and fixed by rotating the tensioning and fixing mechanism 9, driving the stepper motor 1 6 to work, driving the casting to move down to the top surface of the inspection table 2, and driving the inspection block 4 on the inspection table 2 to move synchronously through the positioning and inspection mechanism 5, so that the inner side of the inspection block 4 fits the circumferential outer wall of the forging, and the outer wall size of the forging is obtained through the scale line on the inspection table 2, and then the distance between the inner side of each inspection block 4 and the circumferential outer wall of the forging is measured through the flaw detection unit 44, and the size deviation of the circumferential outer wall of the forging is obtained, and the scale line on the rotating tensioning and fixing mechanism 9 is read at the same time, and the size of the inner wall of the forging is read, so as to obtain the thickness of the forging. When it is necessary to replace the inspection part of the circumferential outer wall of the forging, the stepper motor 2 8 is driven to work, and after driving the forging to rotate, the outer wall size deviation of the forging after rotation is obtained again through the positioning and inspection mechanism 5 and the flaw detection unit 44.

[0032] Combined with Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 and attached Figure 6 As shown, the positioning detection mechanism 5 includes a rotating drum 51 rotatably connected to the bottom surface of the detection platform 2 and located in the placement groove, a rotating disk 52 is fixed on the top of the rotating drum 51, and a plurality of limiting grooves 53 corresponding to the limiting columns 41 are reserved on the top surface of the rotating disk 52, and a connecting block 54 connected to the limiting column 41 is slidably provided in the limiting groove 53, and a pair of fixed blocks 55 are provided at the bottom end of the detection platform 2, and a rotating rod 1 56 is provided in the middle of the fixed blocks 55 for common rotation, and a worm 57 fixed on the rotating rod 1 56 is provided between the opposite sides, and a worm wheel 58 meshing with the worm 57 is fixed on the bottom of the rotating drum 51, and the rotating rod 1 56 passes through the fixed block 55 and is transmission-connected to the stepping motor 3 59 provided on the base 1; The limit groove 53 is arranged on the turntable 52 at an angle to the sliding direction of the detection block 4. Connected installation grooves are reserved on the left and right sides of the cylinder wall at the bottom end of the detection platform 2. A fixed block 55 is installed and fixed in the installation groove. A scale line 10 close to the detection block 4 is provided on the top surface of the detection platform 2.

[0033] The working principle of the positioning detection mechanism 5 is as follows: the stepper motor 3 59 is driven to work, which drives the rotating rod 1 56 to rotate. Under the meshing action of the worm wheel 58 and the worm 57, the rotating drum 51 is driven to rotate, and the turntable 52 rotates accordingly. When the limit groove 53 on the turntable 52 rotates, the connecting block 54 slidingly set in the limit groove 53 drives the detection block 4 connected thereto to move synchronously toward the center of the detection table 2 until the detection block 4 fits with the outer wall of the outermost end of the forging. At this time, the outer wall size of the forging is read by reading the scale line on the detection table 2.

[0034] Combined with Figure 2 , Attachment Figure 3 , Attachment Figure 6 , Attachment Figure 7 , Attachment Figure 8 , Attachment Fig. 9 , Attachment Fig.10 and attached Fig.11 As shown, the defect detection unit 44 includes a slide 441 slidably arranged in the sleeve 43, a telescopic spring 442 is connected between one end of the slide 441 close to the outer wall of the detection platform 2 and the mounting groove 42, a detection rod 443 is provided at the other end, which passes through the detection block 4 and is slidably connected thereto, a scale line 11 is provided on the top of the detection rod 443, a rotating rod 444 is rotatably arranged in the middle of the slide 441, a column head 445 is provided at one end of the rotating rod 444 close to the detection rod 443, a rotating button 446 is provided at the other end after passing through the slide 441 and the detection block 4, and the rotating rod 444 is slidably connected to the slide 441 and is rotatably connected to the detection block 4, a pair of arc-shaped transmission plates 447 symmetrically distributed on the circumferential outer wall of the column head 445 is provided, and a pair of rotating columns 448 slidably matched and connected to the lower side of the arc-shaped transmission plate 447 are provided on the circumferential inner wall of the slide 441; The arc-shaped transmission plate 447 spirally extends from the top surface of the column head 445 to the bottom surface of the column head 445. The number of spiral turns of the arc-shaped transmission plate 447 is two-fifths of a turn, which will not block the rotating column 448 from moving up and down between the two arc-shaped transmission plates 447. A pair of rotating seats 449 rotatably connected to the rotating column 448 are fixed to the circumferential inner wall of the slide cylinder 441, and a rotating groove slidably connected to the rotating column 448 is reserved at the bottom end of the arc-shaped transmission plate 447.

[0035] The working principle of the defect detection unit 44 is as follows: the rotating knob 446 drives the rotating rod 444 to rotate, and the column head 445 rotates accordingly, so that the rotating column 448 on the inner wall of the slide 441 is separated from the rotating groove at the bottom of the arc-shaped transmission plate 447 at the bottom end of the column head 445, and under the action of the telescopic spring 442, the slide 441 is driven to move in the direction of the forging in the sleeve 43, and the detection rod 443 set at the end of the slide 441 extends out of the detection block 4 and fits the outer wall of the forging. By reading the scale line 11 on the detection rod 443 in each detection block 4, the size deviation of the outer wall of the forging is obtained, thereby measuring the error between the actual size of the forging and the standard size; when the detection is completed and the detection rod 443 needs to be retracted, the rotating knob 446 is rotated in the opposite direction to drive the column head 445 to move. The arc-shaped transmission plate 447 arranged on the outer peripheral wall of the column head 445 cooperates with the rotating column 448 to drive the slide 441 to move away from the detection block 4 until the rotating column 448 moves into the rotating groove at the bottom end of the arc-shaped transmission plate 447, and the rotating button 446 is released to complete the retraction of the detection rod 443.

[0036] Combined with Figure 2 , Attachment Fig.12 , Attachment Fig.13 and attached Fig.14 As shown, the rotary tensioning and fixing mechanism 9 includes a cross connecting plate 91 fixedly connected to the output shaft of the stepper motor 8, and an internal threaded cylinder 92 is provided on the bottom surface of the cross connecting plate 91. The internal threaded cylinder 92 is provided with a connecting slide 93 sliding around the inner wall, and its internal thread is connected to a connecting screw 94. After the connecting screw 94 passes through the connecting slide 93, a rotating handle 95 is provided, and the connecting screw 94 is rotatably connected to the connecting slide 93.

[0037] The four arms of the cross connecting plate 91 are all provided with a moving groove 96, and a telescopic block 97 is slidably connected in the moving groove 96. The telescopic block 97 is bent downward and extended to be provided with an inner support plate 98. A plurality of connecting arms 99 are provided on the circumferential outer wall of the connecting slide 93, and the upper and lower ends of the inner side of the inner support plate 98 and the upper and lower ends of the connecting arm 99 are hinged with a hinge plate 910. The outer side of the inner support plate 98 is provided with a semicircular inner support rod 911, and the top surface of the four arms of the cross connecting plate 91 is provided with a scale line 12 perpendicular to the moving groove 96.

[0038] The working principle of the rotary tensioning and fixing mechanism 9 is as follows: when the forging needs to be fixed, first fit the top of the forging with the bottom surface of the cross connecting plate 91, rotate the rotating handle 95, drive the connecting screw 94 to rotate, and under the action of the threaded connection between the connecting screw 94 and the internal threaded cylinder 92, drive the connecting slide 93 to move upward, and through the hinge plate 910 set between the inner support plate 98 and the connecting arm 99, drive all the telescopic blocks 97 on the cross connecting plate 91 to move synchronously in the moving groove 96 toward the inner wall of the forging, until the inner support rod 911 is in close contact with the inner wall of the forging, and the forging is tightened and fixed by the inner ring. At this time, release the rotating handle 95, the inner support rod 911 still tightens and fixes the forging without loosening, and then read the inner wall size of the forging through the scale line 3 12 set on the cross connecting plate 91.

[0039] In the specific implementation of the present invention, when it is necessary to inspect the size of a round steel pipe forging, first place the forging at the bottom end of the cross connecting plate 91, rotate the handle 95, and tighten the forging on the inner supporting plate 98. At this time, by reading the scale line 312 on the cross connecting plate 91, the inner wall size of the forging is obtained, and then the stepper motor 16 is driven to work, and the forging is driven to move downward onto the inspection table 2, and the stepper motor 359 is driven to work to drive the inspection block 4 to move synchronously toward the forging until the inspection block 4 is in contact with the outermost pipe wall of the forging, and the stepper motor 359 is stopped to read the scale line 312 on the inspection table 2. The scale line 10 on the top surface is used to obtain the outer wall size of the forging, and then the knob 446 on each detection block 4 is rotated to drive the detection rod 443 to move out of the detection block 4 and finally fit with the outer wall of the forging. By reading the scale line 11 on the detection rod 443, the length of the detection rod 443 extending out of the detection block 4 is obtained, thereby obtaining the dimensional deviation of the forging when it is in close contact with the detection block 4 at this time; when it is necessary to detect the dimensional deviation of other parts of the forging, drive the stepper motor 2 8 to work, drive the forging to rotate, and then repeat the above steps again to detect the dimensional deviation of other positions of the rotated round tube forging.

[0040] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A device for detecting the size of a finished forging, comprising a base (1), on which a detection table (2) and a height adjustment frame (3) are fixedly mounted, characterized in that: The bottom of the detection platform (2) is provided with an open placement groove, and a plurality of detection blocks (4) are slidably provided on the upper part and are evenly distributed around the circumference. A limit column (41) is provided at the bottom of the detection block (4), and a positioning detection mechanism (5) is provided in the placement groove to drive the limit column (41) to move back and forth synchronously toward the center of the detection platform (2). A mounting groove (42) is reserved on the detection block (4), and a sleeve (43) is provided in the mounting groove (42), and a defect detection unit (44) is provided in the sleeve (43); The height adjustment frame (3) is provided with a slide groove (31) in advance, a threaded rod (32) is rotatably arranged in the slide groove (31), the threaded rod (32) passes through the height adjustment frame (3) and is transmission-connected to the first stepping motor (6), a mounting bracket (7) is arranged in the slide groove (31) and is threadedly connected to the threaded rod (32), a second stepping motor (8) is mounted on the mounting bracket (7), and the output shaft of the second stepping motor (8) is fixedly connected to a rotating tensioning and fixing mechanism (9).

2. A forging finished product size detection device according to claim 1, characterized in that: The positioning detection mechanism (5) comprises a rotating drum (51) rotatably connected to the inner bottom surface of the detection platform (2) and located in the placement groove, a rotating disk (52) is fixed on the top of the rotating drum (51), a plurality of limiting grooves (53) corresponding to the limiting columns (41) are reserved on the top surface of the rotating disk (52), and a connecting block (54) is slidably provided in the limiting groove (53) and is matched with the limiting column (41). A pair of fixed blocks (55) are provided at the bottom end of the detection platform (2), a rotating rod (56) is provided in the middle of the fixed blocks (55) for co-rotation, a worm (57) is provided between the opposite side surfaces and is sleeved and fixed on the rotating rod (56), a worm wheel (58) meshing with the worm (57) is sleeved and fixed on the bottom of the rotating drum (51), and the rotating rod (56) passes through the fixed blocks (55) and is transmission-connected to a stepping motor (59) provided on the base (1).

3. A forging finished product size detection device according to claim 2, characterized in that: The limit groove (53) is arranged on the turntable (52) at an angle to the sliding direction of the detection block (4); the left and right sides of the cylinder wall at the bottom end of the detection platform (2) are provided with interconnected installation grooves, in which a fixed block (55) is installed and fixed; and the top surface of the detection platform (2) is provided with a scale line one (10) close to the detection block (4).

4. A forging finished product size detection device according to claim 1, characterized in that: The defect detection unit (44) comprises a slide cylinder (441) slidably arranged in the sleeve (43), a telescopic spring (442) is connected between one end of the slide cylinder (441) close to the outer wall of the detection platform (2) and the mounting groove (42), and a detection rod (443) is provided at the other end thereof, passing through the detection block (4) and being slidably connected thereto, a second scale line (11) is provided at the top of the detection rod (443), and a second rotating rod (444) is rotatably arranged in the middle of the slide cylinder (441), and the second rotating rod (444) is close to the detection block (4). A column head (445) is provided at one end of the rod (443), and a knob (446) is provided at the other end after passing through the slide cylinder (441) and the detection block (4). The second rotating rod (444) is slidably connected to the slide cylinder (441) and is rotationally connected to the detection block (4). A pair of arc-shaped transmission plates (447) symmetrically distributed on the circumferential outer wall of the column head (445) are provided. A pair of rotating columns (448) slidably matched with the lower side surfaces of the arc-shaped transmission plates (447) are provided on the circumferential inner wall of the slide cylinder (441).

5. A forging finished product size detection device according to claim 4, characterized in that: The arc-shaped transmission plate (447) spirally extends from the top surface of the column head (445) to the bottom surface of the column head (445), and the number of spiral turns of the arc-shaped transmission plate (447) is two-fifths of a turn. A pair of rotating seats (449) rotatably connected to the rotating column (448) are fixed to the circumferential inner wall of the slide cylinder (441), and a rotating groove slidably connected to the rotating column (448) is reserved at the bottom end of the arc-shaped transmission plate (447).

6. A forging finished product size detection device according to claim 1, characterized in that: The rotary tensioning and fixing mechanism (9) comprises a cross connecting plate (91) fixedly connected to the output shaft of the second stepping motor (8); the bottom surface of the cross connecting plate (91) is provided with an internal thread cylinder (92); the internal thread cylinder (92) is provided with a connecting slide cylinder (93) slidingly arranged on the inner wall thereof in a circumferential direction, and the internal thread of the connecting slide cylinder (92) is connected with a connecting screw rod (94); the connecting screw rod (94) passes through the connecting slide cylinder (93) and is provided with a rotating handle (95); and the connecting screw rod (94) is rotatably connected to the connecting slide cylinder (93).

7. A forging finished product size detection device according to claim 6, characterized in that: A movable groove (96) is reserved on each of the four supporting arms of the cross connecting plate (91), a telescopic block (97) is slidably connected in the movable groove (96), the telescopic block (97) is bent downward and extended to be provided with an inner support plate (98), a plurality of connecting arms (99) are provided on the circumferential outer wall of the connecting slide cylinder (93), and hinge plates (910) are hingedly connected at the upper and lower ends of the inner side of the inner support plate (98) and the upper and lower ends of the connecting arms (99).

8. A forging finished product size detection device according to claim 7, characterized in that: The outer side surface of the inner support plate (98) is provided with a semicircular inner support rod (911), and the top surfaces of the four supporting arms of the cross connecting plate (91) are all provided with three scale lines (12) perpendicular to the moving groove (96).

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