A positioning locking clamp and wire rewinding device

Abstract

The utility model provides a positioning locking fixture and a wire-rewinding device, comprising a positioning block assembly and a locking mechanism sequentially arranged on a horizontal substrate, and the positioning block assembly and the locking mechanism respectively form horizontal limit and selective longitudinal limit for the workpiece to be processed, so that when the screw hole on the workpiece is rewinding, it can be quickly stabilized on the positioning locking fixture through the locking mechanism, thereby improving the quality of the screw hole wire-rewinding processing. Furthermore, a wire-rewinding device is provided, through the cooperation of the wire-rewinding cone head and the locking mechanism, after the workpiece is rewinded, the next workpiece can be quickly rewinded, so that the wire-rewinding processing of the workpiece is formed into a batch and operational operation, thereby improving the efficiency of the screw hole wire-rewinding processing.

Description

Technical Field

[0001] The utility model relates to the field of e-sports chair processing, in particular to a positioning locking clamp and a wire rewinding device. Background Art

[0002] The seat assembly or back assembly inside the existing gaming chair has a main supporting structure, which is a metal frame structure in the seat assembly or back assembly, that is, a seat frame or back frame. The seat frame or back frame is usually a frame-shaped structure surrounded by two front and rear cross bars and two left and right longitudinal bars perpendicular to the front and rear cross bars, such as Figure 2 As shown, in order to connect the seat frame and the back frame as the workpieces with other components, vertical plates 10 are usually set on the left and right cross bars, and then screw holes are drilled on the vertical plates 10 along the left and right directions. The screw holes need to be rethreaded after processing, that is, the tap head is used to screw into the processed screw holes again. While testing the processing quality of the screw holes, metal debris during the screw hole processing can also be cleaned out.

[0003] Most of the existing wire-return processing methods adopt manual processing, that is, the tap head is first installed on the drill, and then the tap head is manually aligned with the screw hole, and then the drill is driven to process the screw hole for wire-return. However, due to this manual operation method, not only is it easy to have deviations when aligning the holes, but it also takes a lot of time to align the holes, which is easy to cause damage to the screw holes and deformation of the vertical plate 10, while affecting the quality and efficiency of the wire-return processing. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a positioning and locking clamp, which forms horizontal limit and selective longitudinal limit for the workpiece through the positioning block assembly and the locking mechanism, so that when the screw hole on the workpiece is rewinding, it can be quickly kept stable on the positioning and locking clamp through the locking mechanism, thereby improving the quality of the screw hole rewinding processing.

[0005] Furthermore, a wire rewinding device is provided. Through the cooperation of the wire rewinding cone head and the locking mechanism, after the wire rewinding of the processed workpiece is completed, the wire rewinding processing of the next workpiece can be quickly carried out, so that the wire rewinding processing of the processed workpiece can be batched and operationalized, thereby improving the efficiency of the screw hole wire rewinding processing.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A positioning and locking fixture comprises a horizontal base plate, on which a locking mechanism and a positioning block assembly are arranged in sequence and at intervals. The positioning block assembly can respectively abut against the front and rear cross bars and the left and right cross bars of a workpiece in the front-to-back direction and the left-to-right direction to limit the horizontal movement of the workpiece; the locking mechanism comprises a base and a pressure rod which can be longitudinally deflected on the base, and the head of the pressure rod can contact or separate from the processing seat frame through its own longitudinal deflection to form or release the longitudinal limit of the workpiece.

[0008] Preferably, the positioning and locking clamp also includes a first top block symmetrically arranged along the front-to-back direction and the left-to-right direction, and the first top block is supported under the workpiece so that the workpiece is in a suspended state relative to the horizontal substrate; thereby avoiding interference or collision between the workpiece and the horizontal substrate during wire recycling processing, and ensuring the stability of the workpiece during wire recycling processing.

[0009] Preferably, the positioning block assembly includes a front and rear positioning block assembly, which includes a first positioning block and a second positioning block, and the first positioning block and the second positioning block are against a single front and rear cross bar of the workpiece in the front and rear directions; the first positioning block and the second positioning block on the single front and rear cross bar can clamp the front and rear cross bar to prevent the workpiece from moving in the front and rear directions.

[0010] Preferably, the first positioning block is an L-shaped clamping block fixed on the horizontal substrate, the bottom surface of the second positioning block contacts the horizontal substrate, and is connected to the first positioning block in the front-to-back direction by connecting screws; the connecting screws can connect the first positioning block and the second positioning block as a whole, thereby enhancing the structural stability of the first positioning block and the second positioning block.

[0011] Preferably, the positioning block assembly includes left and right positioning block assemblies, and the left and right positioning block assemblies include a third positioning block, which is symmetrically abutted against two left and right longitudinal rods of the workpiece in the left and right directions; two groups of third positioning blocks are arranged side by side front and back to abut against the workpiece, thereby forming a rectangular limiting structure for the workpiece in the left and right directions; the rectangular limiting structure can form four limiting points on the workpiece, making the workpiece more stable in the left and right directions.

[0012] Preferably, the locking mechanism also includes an electric telescopic rod arranged on the side of the base; the middle position of the pressure rod is hinged to the upper end of the base, and the tail of the pressure rod is hinged to the electric telescopic rod, so that the head of the pressure rod can be deflected longitudinally under the drive of the electric telescopic rod; the electric telescopic rod can quickly drive the pressure rod to deflect up and down, so that the locking mechanism can quickly form or contact the longitudinal limit of the workpiece.

[0013] Preferably, a second top block for supporting the workpiece is provided under the pressure rod. The second top block can provide longitudinal supporting force when the head of the pressure rod presses the workpiece, preventing the workpiece from deforming when pressed by the head of the pressure rod, and protecting the structural strength and appearance of the workpiece from being affected.

[0014] Preferably, in the horizontal direction, at least three locking mechanisms are arranged on three sides of the workpiece, thereby forming a triangular longitudinal limit for the workpiece; the triangular structure can provide a stable and sufficient limiting force for the workpiece in the longitudinal direction, avoiding the longitudinal deflection of the workpiece due to insufficient limiting force.

[0015] Preferably, the electric telescopic rods of the three locking mechanisms are all connected to a manual switch, which can issue instructions to the three electric telescopic rods at the same time, so that the three electric telescopic rods drive the heads of the corresponding pressure rods to contact or separate from the workpiece at the same time; so that the three pressure rods themselves can deflect synchronously, thereby improving the efficiency of fixing or separating the workpiece and the positioning locking clamp.

[0016] Preferably, a pressure block is provided at the head of the pressure rod, and the pressure block is longitudinally connected to the head of the pressure rod by an adjusting screw. The adjusting screw can change the distance between the pressure block and the workpiece by rotating itself to adjust the clamping force of the pressure block on the workpiece; so that the clamping force on the workpiece is always within a reasonable range, avoiding insufficient or excessive clamping force on the workpiece.

[0017] Furthermore, a wire rewinding device is provided, comprising a positioning and locking clamp, and further comprising:

[0018] The machine table is configured as a supporting structure of the wire rewinding device;

[0019] A thread return tap head, the thread return tap head has the same number of screw holes as the workpiece being processed; the thread return tap head is horizontally aligned with the screw holes in the left-right direction; the thread return tap head is connected to a transverse driving mechanism, and can rotate circumferentially and extend left-right under the drive of the transverse driving mechanism to perform thread return processing on the screw holes;

[0020] The device has a processing state and a completion state. When the device is in the processing state, the head of the pressure rod contacts the processing workpiece through its own longitudinal deflection to form a longitudinal limit on the processing workpiece. At this time, the driving mechanism can drive the return tap head to perform wire return processing on the screw hole; when the device is in the completion state, the head of the pressure rod can separate from the processing workpiece through its own longitudinal deflection again and release the longitudinal limit on the processing workpiece, so that the processing workpiece and the wire return device are separated longitudinally.

[0021] Preferably, the transverse driving mechanism is a power head, which is connected to the multi-axis device, and the return thread taper head is arranged on the multi-axis device; the cooperation between the power head and the multi-axis device is simple and efficient, and multiple return thread tapers can synchronously perform return thread processing on multiple screw holes.

[0022] The principle of the utility model using the above technical solution is:

[0023] The utility model firstly provides a positioning locking clamp, which forms horizontal limit and selective longitudinal limit for the processed workpiece through the positioning block assembly and the locking mechanism, so that the screw hole on the processed workpiece can be quickly kept stable on the positioning locking clamp through the locking mechanism when the wire is rewound.

[0024] Furthermore, a wire rewinding device is provided, which can quickly carry out wire rewinding processing of the next workpiece after the wire rewinding of the workpiece is completed through the cooperation of the wire rewinding tap head and the locking mechanism.

[0025] The beneficial effects of the utility model using the above technical solution are:

[0026] 1. In the positioning and locking fixture, after the positioning block assembly forms a horizontal limit for the workpiece, the locking mechanism quickly forms a longitudinal limit with the workpiece through the longitudinally deflectable pressure rod, so that the workpiece remains stable in both the horizontal and vertical directions, avoiding movement during wire rewinding and affecting the quality of wire rewinding processing.

[0027] 2. In the locking mechanism of the wire return device, since the pressure rod can be deflected in the longitudinal direction to form or release the longitudinal limit of the workpiece, after the workpiece completes the wire return processing through the wire return tap head, the longitudinal limit of the workpiece can be quickly released by the deflection of the pressure rod, and then the longitudinal limit is formed for the next workpiece placed on the positioning locking fixture that has not been returned. This cycle is repeated, so that the wire return device can standardize and operationalize the wire return of multiple workpieces, greatly improving the efficiency of wire return processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a new type of wire rewinding device;

[0029] Figure 2 It is a schematic diagram of the structure in which the back frame is placed on the positioning and locking fixture;

[0030] Figure 3 An enlarged view of the front and rear positioning block assemblies resting against the front and rear cross bars;

[0031] Figure 4 This is an enlarged view of the locking mechanism when it is separated from the workpiece;

[0032] Figure 5 This is an enlarged view of the locking mechanism in contact with the workpiece;

[0033] Figure 6 It is a schematic diagram of the structure in which the seat frame is placed on the positioning and locking fixture;

[0034] Figure 7This is a schematic diagram of the structure of the wire return device in Example 2 equipped with a longitudinal wire return tap head;

[0035] Figure 8 The control connection schematic diagram for the manual switch to simultaneously control three locking mechanisms;

[0036] The figures are marked as follows: 1-return tap head, 1s-longitudinal driving mechanism, 2-positioning mounting plate, 3-machine table, 4-lateral driving mechanism, 5-horizontal base plate, 6-third positioning block, 7-first top block, 8-front and rear positioning block assembly, 9-locking mechanism, 10-vertical plate, 11-support rod, 12-mounting plate, 13-column, 14-horizontal plate, 15-longitudinal return tap head, 16-second top block, 81-second positioning block, 82-first positioning block, 83-connecting screw, 84-reinforcement screw, 91-base, 92-connecting plate, 93-pressure rod, 94-electric telescopic rod, 931-pressure rod connector, 932-pressure block. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0038] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0040] like Figure 1-8 As shown, the utility model provides specific implementation methods as follows:

[0041] Embodiment 1: This embodiment provides a positioning and locking fixture, which can fix the workpiece to be processed. The workpiece is usually a seat frame or a back frame. The seat frame or the back frame is usually surrounded by two front and rear cross bars and two left and right longitudinal bars. The left and right longitudinal bars in this embodiment are provided with a vertical plate 10, and the vertical plate is provided with left and right through screw holes. The positioning and locking fixture can act on the left and right longitudinal bars and the front and rear cross bars of the seat frame or the back frame to keep the workpiece stable during wire rewinding. Specifically, the positioning and locking fixture includes a horizontal base plate 5, and the horizontal base plate 5 is sequentially provided with a locking mechanism 9 and a positioning block assembly at intervals. The positioning block assembly can be respectively abutted against the front and rear cross bars and the left and right cross bars of the workpiece in the front and rear directions and the left and right directions to limit the horizontal movement of the workpiece; the locking mechanism 9 includes a base 91 and a pressure rod 93 that can be longitudinally deflected on the base 91, and the head of the pressure rod 93 can contact or separate with the left and right longitudinal bars or the front and rear cross bars of the processing seat frame through its own longitudinal deflection to form or release the longitudinal limit of the workpiece.

[0042] Furthermore, although directly placing the workpiece on the horizontal substrate 5 does not affect the fixing effect of the positioning and locking clamp on the workpiece, in order to avoid the wire rewinding mechanism from interfering with the horizontal substrate 5 when rewinding the screw hole, the positioning and locking clamp also includes a first top block 7 symmetrically arranged along the front-to-back direction and the left-to-right direction. The first top block 7 is supported under the workpiece so that the workpiece is in a suspended state relative to the horizontal substrate 5; it avoids interference or collision between the workpiece and the horizontal substrate 5 during the wire rewinding process, thereby ensuring the stability of the workpiece during the wire rewinding process.

[0043] Furthermore, in order to limit the front and rear directions of the workpiece, the positioning block assembly includes a front and rear positioning block assembly 8, and the front and rear positioning block assembly 8 includes a first positioning block 82 and a second positioning block 81, and the first positioning block 82 and the second positioning block 81 are against the single front and rear cross bar of the workpiece along the front and rear directions; the first positioning block 82 and the second positioning block 81 on the single front and rear cross bar can clamp and fix the front and rear cross bar to prevent the workpiece from moving in the front and rear directions.

[0044] Further, relative to connecting both the first positioning block 82 and the second positioning block 81 to the horizontal base plate 5 to limit the front and rear positions of the workpiece, in this embodiment, for the sake of simple and efficient installation, the first positioning block 82 is configured as an L-shaped block fixed on the horizontal base plate, the L-shaped block includes a horizontal plate connected to the horizontal base plate 5 and a vertical plate perpendicular to the horizontal plate, the bottom surface of the second positioning block 81 is in contact with the horizontal base plate 5, and is connected to the vertical plate of the first positioning block 82 in the front and rear directions by connecting screws 83; the L-shaped block is fixed to the horizontal base plate 5 and the second positioning block 81 at the same time, and can also achieve the front and rear position limitation of the workpiece; in addition, the connecting screws 83 can connect the first positioning block 82 and the second positioning block 81 as a whole, thereby enhancing the structural stability of the first positioning block 82 and the second positioning block 81; the distance between the first positioning block 82 and the second positioning block 81 can also be changed by rotating the connecting screws 83, so as to adjust the limiting force of the first positioning block 82 and the second positioning block 81 on the workpiece in the front and rear directions.

[0045] Furthermore, the connecting screw 83 is arranged under the workpiece while connecting the first positioning block 82 and the second positioning block 81, and forms a longitudinal support for the workpiece. Such a design allows the connecting screw 83 to share part of the supporting force of the first top block 7, making the workpiece more stable on the positioning and locking fixture.

[0046] Furthermore, in order to achieve the limitation of the left and right directions of the processed workpiece, the positioning block assembly includes a left and right positioning block assembly, and the left and right positioning block assembly includes a third positioning block 6, and the third positioning block 6 is symmetrically pressed against the two left and right longitudinal rods of the processed workpiece along the left and right directions; there are two groups of third positioning blocks 6 pressed against the processed workpiece side by side front and back, thereby forming a rectangular limiting structure for the processed workpiece in the left and right directions; the rectangular limiting structure can form four limiting points on the processed workpiece, so that the processed workpiece is more stable in the left and right directions; at this point, the front and rear positioning block assembly and the left and right positioning block assembly can together form a pentagonal horizontal limiting structure around the processed workpiece, which makes the processed workpiece more stable on the positioning and locking fixture, and the horizontal movement of the processed workpiece will not occur.

[0047] Furthermore, the third positioning block 6 is also connected together by screws, and the third positioning block 6 is also an L-shaped structure, including a horizontal plate connected to the horizontal base plate 5 and a longitudinal plate against the processing workpiece, and the horizontal plate is provided with a longitudinally penetrating groove extending in the left and right directions. The design of the groove allows the entire third positioning block 6 to have space for adjustment and movement in the left and right directions, so that the third positioning block 6 can adjust the limiting force on the processing frame in the left and right directions as needed.

[0048] Furthermore, the pressure rod in the locking mechanism 9 also needs to be driven by the driving mechanism to deflect up and down, so the locking mechanism 9 also includes an electric telescopic rod 94 arranged at the side position of the base 91; the electric telescopic rod 94 is usually a piston rod in an electric cylinder; a connecting plate 92 is hinged at the upper end of the base 91, the middle position of the pressure rod 93 is hinged to the connecting plate 92 at the upper end of the base 91, and the tail of the pressure rod 93 is hinged to the electric telescopic rod 94, so that the head of the pressure rod 93 can be deflected longitudinally under the drive of the electric telescopic rod 94; the electric telescopic rod 94 can quickly drive the pressure rod 93 to deflect up and down, so that the locking mechanism can quickly form or contact the longitudinal limit of the workpiece.

[0049] Furthermore, in order to prevent the pressure rod 93 from causing deformation of the workpiece when pressing the workpiece, a second top block 16 for supporting the workpiece is provided under the pressure rod 93. The second top block 16 can provide longitudinal supporting force when the head of the pressure rod 93 presses the workpiece, thereby preventing the workpiece from being deformed when pressed by the head of the pressure rod 93, and protecting the structural strength and appearance of the workpiece from being affected.

[0050] Furthermore, in order to enable the locking mechanism 9 to form longitudinal limits on the workpiece at multiple positions to prevent the workpiece from tipping over when the wire is rewound, at least three locking mechanisms 9 are arranged on three sides of the workpiece in the horizontal direction, thereby forming a triangular longitudinal limit for the workpiece; the triangular structure can provide a stable and sufficient limiting force for the workpiece in the longitudinal direction, avoiding the longitudinal deflection of the workpiece due to insufficient limiting force.

[0051] Further, if Figure 8 As shown, if the three electric telescopic rods 94 need to be opened three times, the efficiency of wire rewinding will inevitably be affected. Therefore, the electric telescopic rods 94 of the three locking mechanisms 9 are all connected to the manual switch, and the manual switch can send instructions to the three electric telescopic rods 94 at the same time, so that the three electric telescopic rods 94 drive the heads of the corresponding pressure rods 93 to contact or separate from the workpiece at the same time; such a design allows the three pressure rods 94 to deflect synchronously, thereby improving the efficiency of fixing or separating the workpiece and the positioning and locking fixture.

[0052] Furthermore, in order to ensure that the pressure rod 93 has sufficient clamping force when it contacts the workpiece, a pressure block 932 is provided at the head of the pressure rod 93. The pressure block 932 is longitudinally connected to the head of the pressure rod 93 by an adjusting screw. The adjusting screw can change the distance between the pressure block 932 and the workpiece by rotating itself to adjust the clamping force of the pressure block 932 on the workpiece. This can ensure that the clamping force on the workpiece is always within a reasonable range, avoiding insufficient or excessive clamping force on the workpiece.

[0053] The positioning and locking fixture can cooperate with the wire-returning mechanism to complete efficient wire-returning work. Therefore, the present embodiment further provides a wire-returning device, including the positioning and locking fixture, and also including a machine table 3, the machine table 3 is configured as a supporting structure of the wire-returning device; the wire-returning mechanism, the wire-returning mechanism includes a wire-returning taper head 1 and a transverse driving mechanism 4, the number of the wire-returning taper head 1 and the number of screw holes of the workpiece to be processed are the same; the wire-returning taper head 1 is horizontally aligned with the screw hole in the left-right direction; the wire-returning taper head 1 is connected to the transverse driving mechanism 4, and can rotate circumferentially and extend left and right under the drive of the transverse driving mechanism 4, so as to perform wire-returning processing on the screw hole;

[0054] The device has a processing state and a completion state. When the device is in the processing state, the head of the pressure rod 93 contacts the processing workpiece through its own longitudinal deflection to form a longitudinal limit on the processing workpiece. At this time, the driving mechanism can drive the thread return tap head 1 to process the screw hole; when the device is in the completion state, the head of the pressure rod 93 can separate from the processing workpiece through its own longitudinal deflection again and release the longitudinal limit on the processing workpiece, so that the processing workpiece and the thread return device are separated longitudinally; because the pressure rod 93 can form or release the longitudinal limit on the processing workpiece along the longitudinal deflection, after the processing of the processing workpiece is completed by the thread return tap head 1, the longitudinal limit on the processing workpiece can be quickly released by the deflection of the pressure rod 93, and then the longitudinal limit is formed on the next processing workpiece placed on the positioning and locking fixture without thread return, and this cycle is repeated, so that the thread return device can form standardized and operational operations for the thread return of multiple processing workpieces, greatly improving the efficiency of thread return processing.

[0055] Furthermore, the transverse driving mechanism 4 is a power head, which is connected to the multi-axis device, and the thread return tap head 1 is arranged on the multi-axis device; the cooperation between the power head and the multi-axis device is simple and efficient, and multiple thread return tap heads can synchronously perform thread return processing on multiple screw holes.

[0056] Example 2: Figure 7 As shown, the difference between this embodiment and embodiment 1 is that, in this embodiment, in order to enable the thread return tap head 1 to process screw holes along the longitudinal direction, a carrier is first installed on a horizontal substrate 5, and a support frame is installed at the four corners of the horizontal substrate 5. The support frame includes four support rods 11 connected to the horizontal substrate 5, and a mounting plate 12 is connected to the upper end of the support rod 11. Four vertical columns 13 extending longitudinally are provided at the four corners of the mounting plate 12, and a horizontal plate 14 is provided at the upper end of the vertical column 13. A longitudinal thread return tap head 15 and a longitudinal driving mechanism 1s are installed on the support frame. The longitudinal driving mechanism 1s also includes a power head and a multi-axis device longitudinally arranged on the support frame. By using the cooperation of the longitudinal driving mechanism 1s and the longitudinal thread return tap head 15, the function of the thread return device can be further enriched, so that the thread return device can simultaneously perform thread return processing on the horizontally through and longitudinally through screw holes on the workpiece.

[0057] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A positioning and locking fixture, characterized in that: The invention comprises a horizontal base plate (5), the upper end of which is provided with a locking mechanism (9) and a positioning block assembly in sequence, wherein the positioning block assembly can respectively abut against the front and rear cross bars and the left and right longitudinal bars of a workpiece in the front-to-back direction and the left-to-right direction to limit the horizontal movement of the workpiece; the locking mechanism (9) comprises a base (91) and a pressure rod (93) which can be longitudinally deflected on the base (91), and the head of the pressure rod (93) can contact or separate from the processing seat frame through its own longitudinal deflection to form or release the longitudinal limit of the workpiece.

2. A positioning and locking fixture according to claim 1, characterized in that: The positioning and locking fixture further comprises a first top block (7) symmetrically arranged along the front-to-back direction and the left-to-right direction, wherein the first top block (7) is supported below the workpiece to place the workpiece in a suspended state relative to the horizontal base plate (5).

3. A positioning and locking fixture according to claim 1, characterized in that: The positioning block assembly comprises a front and rear positioning block assembly (8), wherein the front and rear positioning block assembly (8) comprises a first positioning block (82) and a second positioning block (81), wherein the first positioning block (82) and the second positioning block (81) abut against a single front and rear crossbar of a workpiece to be processed along a front-rear direction.

4. A positioning and locking fixture according to claim 3, characterized in that: The first positioning block (82) is an L-shaped clamping block fixed on the horizontal base plate. The bottom surface of the second positioning block (81) contacts the horizontal base plate (5) and is connected to the first positioning block (82) in the front-rear direction via connecting screws (83).

5. A positioning and locking fixture according to claim 1, characterized in that: The positioning block assembly comprises a left and right positioning block assembly, wherein the left and right positioning block assembly comprises a third positioning block (6), wherein the third positioning block (6) is symmetrically pressed against two left and right longitudinal rods of a workpiece in the left and right directions; and two groups of third positioning blocks (6) are pressed against the workpiece in a front-to-back manner, thereby forming a rectangular limiting structure for the workpiece in the left and right directions.

6. A positioning and locking fixture according to claim 1, characterized in that: The locking mechanism (9) further comprises an electric telescopic rod (94) arranged at a side position of the base (91); the middle position of the pressure rod (93) is hinged to the upper end of the base (91), and the tail of the pressure rod (93) is hinged to the electric telescopic rod (94), so that the head of the pressure rod (93) can be deflected in the longitudinal direction under the drive of the electric telescopic rod (94).

7. A positioning and locking fixture according to claim 6, characterized in that: A second top block (16) for supporting the workpiece is provided below the pressure rod (93). The second top block (16) can provide a longitudinal support force when the head of the pressure rod (93) presses the workpiece, thereby preventing the workpiece from being deformed when pressed by the head of the pressure rod (93).

8. A positioning and locking fixture according to claim 6, characterized in that: In the horizontal direction, at least three locking mechanisms (9) are arranged on three sides of the workpiece to form a triangular longitudinal limit for the workpiece.

9. A positioning and locking fixture according to claim 8, characterized in that: The electric telescopic rods (94) of the three locking mechanisms (9) are all connected to a manual switch, and the manual switch can simultaneously issue commands to the three electric telescopic rods (94), so that the three electric telescopic rods (94) drive the heads of the corresponding pressure rods (93) to contact or separate from the workpiece at the same time.

10. The positioning and locking fixture according to claim 1, characterized in that: A pressing block (932) is provided at the head of the pressing rod (93). The pressing block (932) is longitudinally connected to the head of the pressing rod (93) via an adjusting screw. The adjusting screw can change the distance between the pressing block (932) and the workpiece by rotating itself, so as to adjust the clamping force of the pressing block (932) on the workpiece.

11. A wire rewinding device, characterized in that: The positioning and locking fixture according to claim 1 further comprises: A machine platform (3), the machine platform (3) being configured as a supporting structure of the wire rewinding device; A thread return tap head (1), the thread return tap head (1) having the same number as the screw holes of the workpiece being processed; the thread return tap head (1) being horizontally aligned with the screw holes in the left-right direction; the thread return tap head (1) being connected to a transverse driving mechanism (4), and being driven by the transverse driving mechanism (4) to rotate in a circumferential direction and to extend and retract left-right, so as to perform thread return processing on the screw holes; The device has a processing state and a completion state. When the device is in the processing state, the head of the pressure rod (93) contacts the processing workpiece through its own longitudinal deflection to form a longitudinal limit on the processing workpiece. At this time, the drive mechanism can drive the thread return tap head (1) to perform thread return processing on the screw hole. When the device is in the completion state, the head of the pressure rod (93) can separate from the processing workpiece through its own longitudinal deflection again to release the longitudinal limit on the processing workpiece, so that the processing workpiece and the thread return device are separated longitudinally.

12. A wire rewinding device according to claim 11, characterized in that: The transverse driving mechanism (4) is a power head, the power head is connected to a multi-axis device, and the screw tap head (1) is arranged on the multi-axis device.

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