Rib stripping and end face flattening integrated opening and closing device, rib stripping and end face flattening device and reinforcing steel bar straight thread rolling equipment

Abstract

The utility model discloses a rib stripping and end face flattening integrated opening and closing device, a rib stripping and end face flattening device and reinforcing steel bar straight thread rolling equipment. The rib stripping knife and the end face flattening knife are integrated on one main knife holder, or the rib stripping knife, the positioning block and the end face flattening knife are integrated on one main knife holder, namely the main knife holder is integrated. And three or four integrated main tool aprons are uniformly distributed on the same plane to form an openable rib stripping flat end surface device. According to the technical scheme, the machining state sequence is changed into rib stripping, end face flattening and rolling, the structure is simple, the end face flattening cutter is convenient to replace, and meanwhile the service life of the thread rolling wheel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of straight thread rolling of steel bars, in particular to a rib stripping and flat end face integrated opening and closing device, a rib stripping and flat end face device and a straight thread rolling equipment for steel bars. Background Art

[0002] In the currently publicly sold straight thread rib stripping, flat end face rolling equipment for steel bars on the market, the flat end face device is all arranged behind the rolling device in the whole machine, that is, the processing state sequence during the operation of the whole machine is: rib stripping - rolling - flat end face. Among them, there are specifically two flat end face processing methods: one is to install a tool bar on the main shaft of the speed reducer in the whole machine, and install a flat end face blade on the tool bar, and complete the flat end face processing procedure by adding a set of gear and ring speed regulating device at the front end. The other is to directly lengthen the main shaft of the driving force motor on the whole machine, and pass through the main shaft of the speed reducer, and install a flat end face blade at the end of the lengthened main shaft to realize the flat end face processing procedure.

[0003] The common problems existing in the above two flat end face devices integrated in the whole machine are: the length of the original thread rolling wheel must be reduced by half to have enough space to accommodate the tool bar of the flat end face. This has caused a serious reduction in the service life of the thread rolling wheel. In addition, both of the above two flat end face devices integrated in the whole machine have the problems of complex structure and cumbersome replacement of the flat end face blade. Content of the Utility Model

[0004] To overcome the shortcomings of the prior art, the utility model provides a rib stripping and flat end face integrated opening and closing device, a rib stripping and flat end face device and a straight thread rolling equipment for steel bars.

[0005] A rib stripping and flat end face integrated opening and closing device is applied to the straight thread rib stripping, flat end face rolling equipment for steel bars; the rib stripping blade and the flat end face blade are integrated on a total tool holder, or the rib stripping blade, the positioning block and the flat end face blade are integrated on a total tool holder; three or four of the total tool holders are evenly distributed on the same plane, and the rib stripping and flat end face operations are carried out on the material to be processed in an opening and closing manner.

[0006] A rib stripping and flat end face device includes the above-mentioned rib stripping and flat end face integrated opening and closing device, as well as a tool rest, a spring, a tensioning ring, a sliding sleeve, a knocking block and a reset block;

[0007] Among them, three total tool holders in the rib stripping and flat end face integrated opening and closing device are installed on the tool rest; the spring is arranged on the tool rest and is used to limit the closing and expansion of the three total tool holders; the tensioning ring is fixedly connected with the sliding sleeve; the reset block and the knocking block are installed on a preset machine tool;

[0008] When the reset block is in close contact with the back surface of the sliding sleeve, the combination formed by the tensioning ring and the sliding sleeve moves forward to squeeze the three main tool holders.

[0009] After the front surface of the sliding sleeve comes into contact with the knocking block, the combination formed by the tensioning ring and the sliding sleeve moves backward. Under the action of the spring, the three main tool holders expand simultaneously.

[0010] A straight thread rolling equipment for steel bars includes the rib peeling and flat end face integrated opening and closing device as described above; or, includes the rib peeling and flat end face device as described above, as well as the whole machine sliding main shaft, rolling device, reducer, motor and vice.

[0011] Among them, the vice is arranged at the front end of the rib peeling and flat end face integrated opening and closing device in the rib peeling and flat end face device; the rolling device, reducer and motor are sequentially arranged at the rear end of the rib peeling and flat end face integrated opening and closing device in the rib peeling and flat end face device; on the axial direction of the whole machine sliding main shaft, there is also arranged the reset block in the rib peeling and flat end face device, and the knocking block adjusting shaft connected to the whole machine sliding main shaft, and the knocking block in the rib peeling and flat end face device is arranged on the knocking block adjusting shaft.

[0012] The rib peeling and flat end face integrated opening and closing device, rib peeling and flat end face device and straight thread rolling equipment for steel bars provided by the present utility model have the following technical effects:

[0013] 1) The structure is simple, ensuring the service life and facilitating replacement. The rib peeling knives are three groups of six-edge arc knives, which not only ensure the cutting speed and accuracy but also play the role of guiding and assisting in fixing the processed workpiece. Integrating the rib peeling knives and the flat end face knives on one main tool holder at the same time, the processing sequence of the whole machine is: rib peeling - flat end face - rolling. In this way, the effective working surface of the thread rolling wheel does not need to be reduced, ensuring the high-efficiency service life of the thread rolling wheel. When replacing the flat end face knife, only need to remove one main tool holder and loosen the fastening screws to replace the flat end face blade integrated on the main tool holder.

[0014] 2) Strong universality and compatibility. The arc rib peeling knives can be respectively designed into different fixed sizes such as 14, 16, 18, 20, 22, 25, 28, 32, 36, 40 millimeters according to the needs of users. During processing, the rib peeling knives can be directly replaced according to different processing specifications to start processing without manual adjustment. The flat end face knife is of a fixed size and the diameter is larger than the diameter of the workpiece to be processed. When processing a workpiece (steel bar) of a certain specification, directly take out the three integrated main tool holders, replace them with two-edge arc rib peeling knives and flat end face knives suitable for this specification, and then start the processing operation.

[0015] 3) The size of the rib peeling diameter of the workpiece (steel bar) is directly controlled by the formed arc rib peeling knives, without the need for operators to adjust the processing size, which is fast and labor-saving.

[0016] 4) Adjustment is simple and quick. Just change the thickness of the positioning block to adjust the size of the rib-stripping flat head. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of a two-edge straight arc rib-stripping cutter;

[0018] Figure 2 is another three-dimensional view of a two-edge straight arc rib-stripping cutter;

[0019] Figure 3 is a three-dimensional view of a two-edge spiral arc rib-stripping cutter;

[0020] Figure 4 is another three-dimensional view of a two-edge spiral arc rib-stripping cutter;

[0021] Figure 5 is a three-dimensional view of the assembly of a two-edge straight arc rib-stripping cutter;

[0022] Figure 6 is another three-dimensional view of the assembly of a two-edge straight arc rib-stripping cutter;

[0023] Figure 7 is a schematic diagram of the closed working state of a two-edge spiral arc rib-stripping cutter;

[0024] Figure 8 is another schematic diagram of the closed working state of a two-edge spiral arc rib-stripping cutter;

[0025] Figure 9 is a schematic diagram of the closed working state of a two-edge straight arc rib-stripping cutter;

[0026] Figure 10 is another schematic diagram of the closed working state of a two-edge straight arc rib-stripping cutter;

[0027] Figure 11 is a schematic diagram of the closed working state of a two-edge spiral arc rib-stripping cutter;

[0028] Figure 12 is another schematic diagram of the closed working state of a two-edge spiral arc rib-stripping cutter;

[0029] Figure 13 is a schematic diagram of the combination of independent sector end face cutters;

[0030] Figure 14 is another schematic diagram of the combination of independent sector end face cutters;

[0031] Figure 15 is a schematic diagram of the combination of an independent sector cutter holder and each forming blade;

[0032] Figure 16 is another schematic diagram of the combination of an independent sector cutter holder and each forming blade;

[0033] Figure 17 A schematic diagram of a two-edged facing knife consisting of an independent fan-shaped knife seat and two forming blades;

[0034] Figure 18 Another schematic diagram of a two-edged facing knife consisting of an independent fan-shaped knife seat and two forming blades;

[0035] Figure 19 It is a schematic diagram of the positioning block combination;

[0036] Figure 20 is another schematic diagram of the positioning block assembly;

[0037] Figure 21 It is a schematic diagram of the integrated tool holder;

[0038] Figure 22 Another schematic diagram of the integrated tool holder;

[0039] Figure 23 It is a schematic diagram of the state where the ribs are peeled and the flat end faces are closed;

[0040] Figure 24 It is a schematic diagram of the rib stripping and flat end surface expansion state;

[0041] Figure 25 It is a schematic diagram of a straight thread rolling equipment for steel bars;

[0042] The symbols in the drawings of the specification are as follows:

[0043] 100, general knife seat; 101, rib stripping knife; 102, positioning block; 103, flat end knife; 1031, No. 1 independent fan-shaped end knife; 1032, No. 2 independent fan-shaped end knife; 1033, No. 3 independent fan-shaped end knife; 1034, No. 1 forming blade; 1035, No. 2 forming blade; 1036, No. 3 forming blade; 1037, No. 1 small knife seat; 1038, No. 2 small knife seat; 1039, No. 3 small knife seat; 104, blade of linear arc rib stripping knife; 105, positioning block assembly through hole; 106, blade of spiral arc rib stripping knife; 107, blade of independent fan-shaped end knife;

[0044] 201, forming blade; 202, independent fan-shaped end face knife seat; 203, two-edged straight arc stripping knife; 204, two-edged spiral arc stripping knife; 205, independent fan-shaped end face knife;

[0045] 301. Reset (working state) pressing surface; 302. Expanding (working state) contact surface; 303. Tightening ring arc top contact surface; 304. Sliding sleeve; 3041. Front end face of the sliding sleeve; 3042. Rear end face of the sliding sleeve; 305. Reset block; 3051. Front end face of the sliding sleeve; 306. Knocking block; 307. Tightening ring; 308. Tool rest; 309. Pressing spring pin; 310. Spring hole position; 311. Whole machine machining feed direction; 312. Whole machine reset direction; 313. Spring position on the tool rest; 314. Screw

[0046] 400. Rib stripping and flat end face device; 401. Rolling device; 402. Reducer; 403. Motor; 404. Front end of the sliding sleeve; 405. Rear end of the sliding sleeve; 406. Tightening ring; 407. Knocking block; 408. Vice; 409. Whole machine sliding main shaft; 410. Whole machine feed handle; 411. Reset block; 412. Knocking block adjustment shaft

[0047] 500. Workpiece to be machined Specific embodiments

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and 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 the present utility model and are not used to limit the present utility model

[0049] In one embodiment, a rib stripping and flat end face integrated opening and closing device, a rib stripping and flat head device and a straight thread rolling equipment for steel bars are provided, as Figures 1 to 25 shown

[0050] The rib stripping and flat end face integrated opening and closing device includes three total tool holders 100; One arc rib stripping tool 101 and one flat end face tool 103 are integrated on each total tool holder, and the arc rib stripping tool and the flat end face tool are arranged front and back; The three total tool holders are respectively centered on the same central axis, and every two adjacent ones are arranged at an interval of 120°, and the three arc rib stripping tools are respectively arranged on the first plane centered on the central axis, and the three flat end face tools are respectively arranged on the second plane centered on the central axis. That is, the cutting edges of the three arc rib stripping tools are evenly distributed on the surface of the workpiece coaxial with the central axis, and the cutting edges of the three flat end face tools are perpendicular to the axis; That is, perpendicular to the end face of the workpiece

[0051] Its working principle is as follows: The material to be processed moves along the center axis. When the three main tool holders are closed, the material to be processed is first ribbed by the arc ribbing tool (machining the outer circle); then the flat end face is milled by the flat end face tool. That is, the ribbing tool and the flat end face tool are integrated on one main tool holder, integrating the functions of ribbing (machining the outer circle of the steel bar) and flat end face (milling the end face). The processing sequence of the whole machine is adjusted to: ribbing - flat end face - rolling. When the three main tool holders expand, one processing operation is completed.

[0052] Specifically, the arc ribbing tool is used to machine the outer circle and can be a straight arc ribbing tool or a spiral arc ribbing tool. The straight arc ribbing tool or the spiral arc ribbing tool includes single-edge, two-edge, three-edge, four-edge or multi-edge tools. The outer circle size that each specification of ribbing tool can machine has been fixed according to requirements. Each specification has a corresponding ribbing tool, and it can be directly replaced during processing to start machining without the operator adjusting the machining size.

[0053] For example, when using a straight arc ribbing tool, when the three straight arc tools are closed for ribbing, the six cutting edges are evenly distributed on the surface of the workpiece and simultaneously play a role in clamping the workpiece when starting to cut during machining. This kind of straight arc tool has a relatively low manufacturing cost.

[0054] When using a spiral arc ribbing tool, when the three ribbing blades are closed and enter the processing state, the six cutting edges are evenly "wrapped" around the surface of the workpiece to be processed in a spiral shape. While machining the outer circle of the workpiece, it also plays a role in guiding the machining feed and clamping the workpiece, reducing the circular runout of the workpiece during machining. Thereby improving the machining efficiency and accuracy.

[0055] Furthermore, the ribbing tool can be designed to be composed of two, four individuals, etc. to form a ribbing combination body for machining the outer circle.

[0056] Technical solution of the flat end face tool (milling the end face): The flat end face tool is divided into two specifications. One specification covers the machining size range: diameter 16 mm - 32 mm. The other specification covers the machining size range: diameter 36 mm - 40 mm. In addition, more specifications of flat end face tools can also be designed according to needs; the machining size covered by the end face tool can also be designed as: diameter 16 mm - 40 mm.

[0057] The flat end face tool includes two implementation methods:

[0058] In one implementation method, as Figure 13 、 14 shown, the flat end face tool is composed of three, four or more independent sector-shaped end face tools: Each independent sector-shaped end face tool can be made into multiple cutting edges 107 such as single-edge, two-edge, three-edge, four-edge, six-edge, etc. according to requirements, so that when the flat end face tool is closed, an end face tool with a circular cross-section is formed.

[0059] In another implementation, as Figures 15 to 18 shown, the flat end face cutter is composed of a sector cutter seat and a formed blade. Each flat end face cutter includes three or four independent sector cutter seats, and a preset number of formed blades are installed on each sector cutter seat. When the three sector cutter seats are closed, they form a two-edge, three-edge, four-edge or six-edge end face cutter with a circular cross-section. Preferably, at least one of the three sector cutter seats is installed with a formed blade passing through the center of the circle, or at least one is installed with a blade passing through the center of the circle and a blade not passing through the center of the circle; for example, a blade passing through the center of the circle is installed on the No. 1 small cutter seat 1037, a blade passing through the center of the circle and a blade not passing through the center of the circle are installed on the No. 2 cutter seat 1038, and a blade not passing through the center of the circle is installed on the No. 3 small cutter seat 1039. Similarly, a blade passing through the center of the circle can also be installed on the No. 1 small cutter seat, a blade not passing through the center of the circle can be installed on the No. 2 small cutter seat, and a blade not passing through the center of the circle (or no blade can be installed) can be installed on the No. 3 small cutter seat. When the three small cutter seats are closed, they are combined into a four-edge end face milling cutter or a three-edge end face milling cutter (when no blade is installed on the No. 3 small cutter seat, it is a two-edge end face milling cutter).

[0060] Furthermore, a positioning block 102 is also provided on each main cutter seat. The positioning block is arranged between the arc rib-removing cutter and the flat end face cutter; the positioning block is used to adjust the size of the rib-removing flat head. The positioning block can be replaced according to the rib-removing lengths of different specifications. For example, the thickness of the positioning block can be customized according to the length required for each specification, and the diameter of the combined body through hole 105 can be customized according to the diameter of the workpiece.

[0061] The rib-removing flat head device includes the above-mentioned rib-removing flat end face integrated opening and closing device, as well as a tool rest 308, a spring, a tensioning ring 307, a sliding sleeve 304, a knocking block 306 and a reset block 305;

[0062] Among them, the three main cutter seats in the rib-removing flat end face integrated opening and closing device are installed on the tool rest; the spring is arranged on the tool rest and is used to assist the closing and opening of the three main cutter seats; the tensioning ring is fixedly connected with the sliding sleeve; the reset block and the knocking block are installed on a preset machine tool. The tool rest is provided with a groove matching with the main cutter seat, and holes 310 along the radial direction are arranged in the groove, and springs are installed in the holes; pins 309 for pressing the springs are fixed on the three main cutter seats.

[0063] When the reset block is in close contact with the back of the sliding sleeve, at this time, the tensioning ring fixedly connected with the sliding sleeve moves forward along the arc inclined surface on the main cutter seat, and at the same time, the three integrated main cutter seats are extruded to the required processing size, and the rib-removing flat head process starts.

[0064] When the front of the sliding sleeve collides with the knock-out block, the tension ring and the sliding sleeve connected thereto move backwards. At this time, the three integrated tool holders expand at the same time under the action of the spring. The workpiece passes through the expanded space of the three integrated tool holders, through the rib-stripping flat head assembly, and enters the rolling device connected to the tool holder at the rear for the rolling process.

[0065] Specifically, Figure 23 , 24 As shown, three of the total knife seats 100 that integrate two-edged circular arc rib stripping knives, positioning blocks and flat end face knives can each slide radially in the groove on the knife holder. Both sides of each groove on the knife holder that matches the total knife seat have holes along the radial direction, and springs are installed in the holes. The tension ring and the sliding sleeve assembly move forward to squeeze the three integrated total knife seats, so that the three integrated total knife seats squeeze the springs and move toward the center of the circle along the radial direction. When the three arc tops of the tension ring are simultaneously pressed and contacted with the reset pressing surfaces of the three integrated knife seats, the three arc knives integrated on the total knife seat form a fixed-size rib stripping knife body, and the three independent fan-shaped end face knives integrated on the total knife seat are combined to form a complete end face knife for milling the flat end face.

[0066] When the entire rib stripping and flattening device is working forward, when the front end of the sliding sleeve contacts and collides with the collision block, the tension ring connected to the sliding sleeve begins to move backward relative to the feeding direction. At this time, the three arc tops of the tension ring gradually separate from the reset pressing surface of the integrated master knife seat at the same time. At this time, under the action of the spring, the three integrated master knife seats begin to move centrifugally along the radial direction. When the three arc tops of the tension ring are in full contact with the expanded contact surface of the integrated knife seat at the same time, the three two-edged arc rib stripping knives, positioning blocks, and independent fan-shaped end face knives integrated on the master knife seat expand at the same time. At this point, the rib stripping and flattening process is completed, and the workpiece enters the next rolling process after the rib stripping knife, positioning block, and end face knife expand.

[0067] A steel bar straight thread rolling device includes the above-mentioned rib stripping flat end surface integrated opening and closing device. Its structure except the rib stripping flat end surface integrated opening and closing device is the existing technology and will not be described here.

[0068] In one implementation, the steel bar straight thread rolling equipment includes the above-mentioned rib stripping and flattening device, as well as a whole machine sliding spindle 409, a rolling device 401, a reducer 402, a motor 403 and a vise 408;

[0069] Among them, the rib stripping and flat end device includes a rib stripping and flat end face device 400; the vise is arranged at the front end of the integrated opening and closing device for rib stripping and flat end face in the rib stripping and flat end device; the rolling device, the reduction gearbox and the motor are sequentially arranged at the rear end of the integrated opening and closing device for rib stripping and flat end face in the rib stripping and flat end device; on the axial direction of the sliding main shaft of the whole machine, a reset block 411 in the rib stripping and flat end device is further arranged, and a knocking block adjusting shaft 412 connected to the sliding main shaft of the whole machine, and a knocking block 407 in the rib stripping and flat end device is arranged on the knocking block adjusting shaft.

[0070] After the rolling process is completed, under the action of the limit switch, the motor rotates reversely, and the whole headstock (including the rib stripping and flat end face and rolling devices) moves backward until the rear end face of the sliding sleeve contacts and collides with the reset block, causing the combination of the tensioning ring and the sliding sleeve to move forward, and squeezing the three integrated total tool holders to reset again.

[0071] Specifically, as Figure 25 shown, the three integrated total tool holders are in a closed state until the front end of the sliding sleeve contacts and knocks open the tensioning ring. At this time, the three integrated total tool holders expand, and the rib stripping and flat section process is completed. After the three integrated total tool holders expand, the whole machine continues to feed along this direction. Subsequently, the workpiece passes through the rib stripping and flat end face mechanism and enters the rolling body for rolling the thread process. The rolling length is controlled by the travel switch installed on the bed to the required rolling thread length. When the rolling length is satisfied and contacts the travel switch, the motor is controlled to rotate reversely and retreat along this direction through the whole machine circuit. Operate the feed handle along this direction until the sliding sleeve contacts the reset block, and the three integrated total tool holders are closed again, thus completing a complete processing process.

[0072] The above is an elaboration on the integrated opening and closing device for rib stripping and flat end face, the rib stripping and flat end device and the straight thread rolling equipment for steel bars of the present invention, which is used to help understand the present invention; however, the implementation mode of the present invention is not limited by the above embodiments. Any change, modification, substitution, combination, and simplification made without departing from the principle of the present invention shall be an equivalent replacement method and shall be included in the protection scope of the present invention.

Claims

1. A rib-stripping and flat-end surface integrated opening and closing device, characterized in that The rib-removing and flat-end face integrated opening and closing device is applied to a straight thread rib-removing and flat-heading rolling equipment for steel bars; the rib-removing cutter and the flat-end face cutter are integrated on a total tool holder, or the rib-removing cutter, the positioning block, and the flat-end face cutter are integrated on a total tool holder; three or four of the total tool holders are evenly distributed on the same plane, and the rib-removing and flat-end face operations are performed on the material to be processed in an opening and closing manner.

2. The rib-removing and flat-end surface integrated opening and closing device according to claim 1, wherein, The rib-removing and flat-end face integrated opening and closing device includes three total tool holders; each total tool holder is integrated with an arc rib-removing cutter and a flat-end face cutter, and the arc rib-removing cutter and the flat-end face cutter are arranged front and back; the three total tool holders are respectively centered on the same central axis, and each adjacent two are arranged at an interval of 120°, and the three arc rib-removing cutters are respectively centered on the central axis and arranged on the first plane, and the three flat-end face cutters are respectively centered on the central axis and arranged on the second plane; When the three total tool holders are closed, they are used to perform rib-removing and flat-end face operations on the material to be processed; when the three total tool holders are expanded, a machining operation is completed.

3. The rib stripping and flat end surface integrated opening and closing device according to claim 2, characterized in that, A positioning block is further provided on each total tool holder, and the positioning block is arranged between the arc rib-removing cutter and the flat-end face cutter; the positioning block is used to adjust the size of the rib-removing flat head.

4. The rib-stripping and flat-end surface integrated opening and closing device according to claim 2, wherein, The arc rib-removing cutter is a straight arc rib-removing cutter or a spiral arc rib-removing cutter, and the straight arc rib-removing cutter or the spiral arc rib-removing cutter includes a single-edge, two-edge, three-edge, four-edge or multi-edge cutter.

5. The rib-stripping and flat-end surface integrated opening and closing device according to any one of claims 1 to 4, characterized in that, The flat-end face cutter is three, four or more independent sector-shaped end face cutters, and the sector-shaped end face cutters form an end face machining tool with a circular cross-section; each sector-shaped end face cutter includes a single-edge, two-edge, three-edge, four-edge or six-edge cutting edge.

6. The rib-stripping and flat-end integrated opening and closing device according to any one of claims 1 to 4, characterized in that, The flat-end face cutter is composed of a sector tool holder and a formed blade; each flat-end face cutter includes three or four independent sector tool holders, and a preset number of formed blades are installed on each sector tool holder. When three or four sector tool holders are closed, they form a two-edge, three-edge, four-edge or six-edge end face cutter with a circular cross-section.

7. The rib-stripping and flat-end integrated opening and closing device according to any one of claims 6, characterized in that, At least one of the three sector tool holders is installed with the formed blade passing through the center of the circle, or at least one is installed with the blade passing through and not passing through the center of the circle.

8. A rib-stripping flat head device, characterized in that, It includes the rib-removing and flat-end face integrated opening and closing device according to any one of claims 1 to 7, as well as a tool holder, a spring, a tensioning ring, a sliding sleeve, a knocking block and a reset block; Among them, the three total tool holders in the rib-removing and flat-end face integrated opening and closing device are installed on the tool holder; the spring is arranged on the tool holder and is used to limit the closing and expansion of the three total tool holders; the tensioning ring is fixedly connected with the sliding sleeve; the reset block and the knocking block are installed on a preset machine tool; When the reset block is in close contact with the back surface of the sliding sleeve, the combination body formed by the tensioning ring and the sliding sleeve moves forward to squeeze the three total tool holders; When the front surface of the sliding sleeve contacts the knocking block, the combination body formed by the tensioning ring and the sliding sleeve moves backward, and under the action of the spring, the three total tool holders expand simultaneously.

9. The rib stripping and flat head device according to claim 8, characterized in that, A groove that mates with the main tool holder is provided on the tool rest. Holes in the radial direction are provided in the groove, and the springs are installed in the holes. Pins for pressing the springs are fixed on the three main tool holders.

10. A straight thread rolling equipment for steel bars, characterized in that, It includes the rib stripping and flat end face integrated opening and closing device according to any one of claims 1 to 7; or, it includes the rib stripping and flat head device according to any one of claims 8 to 9, as well as the integral sliding main shaft of the machine, the rolling device, the speed reducer, the motor, and the vise. Among them, the vise is provided at the front end of the rib stripping and flat end face integrated opening and closing device in the rib stripping and flat head device; the rolling device, the speed reducer, and the motor are sequentially provided at the rear end of the rib stripping and flat end face integrated opening and closing device in the rib stripping and flat head device; a reset block in the rib stripping and flat head device and a knocking block adjusting shaft connected to the integral sliding main shaft of the machine are further provided in the axial direction of the integral sliding main shaft of the machine, and a knocking block in the rib stripping and flat head device is provided on the knocking block adjusting shaft.

Images