CN105665612A - Screw heading machine - Google Patents
Screw heading machine Download PDFInfo
- Publication number
- CN105665612A CN105665612A CN201610045821.6A CN201610045821A CN105665612A CN 105665612 A CN105665612 A CN 105665612A CN 201610045821 A CN201610045821 A CN 201610045821A CN 105665612 A CN105665612 A CN 105665612A
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- CN
- China
- Prior art keywords
- ram
- heading machine
- lobe
- groove
- lathe bed
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/56—Making machine elements screw-threaded elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
- B21J13/14—Ejecting devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling, Broaching, Filing, Reaming, And Others (AREA)
Abstract
The invention provides a screw heading machine, and belongs to the technical field of machining. The screw heading machine comprises a lathe bed, a sliding pillow and a die mechanism; the lathe bed is provided with a first protrusion and a second protrusion, a groove with a reversed-T-shaped cross section is formed in the upper end of the first protrusion, and a sliding inlaying part matched with the groove is arranged at the lower end of the sliding pillow; the sliding inlaying part can move in the horizontal direction of the groove, a plurality of insertion holes are formed in one end, facing the second protrusion, of the sliding pillow, and puncher pins with male dies are inserted on the insertion holes; the die mechanism is located in the second protrusion and comprises a cylindroid die box and a driving device for driving the die box to do intermittent movement, the die box faces the puncher pins and is provided with a plurality of female dies, and discharging ejection rods are arranged on the female dies; pushing rods are further arranged on the second protrusion, and check blocks abutting against the outer wall of the second protrusion are arranged on the outer sides of the discharging ejection rods; and the lathe bed is further provided with stopping blocks abutting against the check blocks when the stopping block and the check blocks do reversed movement. According to the screw heading machine, the machining efficiency is improved, and the failure rate is further reduced.
Description
Technical field
The invention belongs to Machining Technology field, relate to a kind of heading machine.
Background technology
Heading machine is different according to the industry used, it is possible to be divided into Machine for making end-piece of shoelace and heading machine. Generally when in use, it is possible to carry out combination in any, generally will not occur with absolute version. Such as semi-automatic hilted broadsword machinery send glue Machine for making end-piece of shoelace, full-automatic double-pole computer to send glue Machine for making end-piece of shoelace, full-automatic double-pole machinery to send glue gift band heading machine.
Heading machine belongs to cold-heading equipment, and function rushes product for punching one mould two, mainly the use of the head formation of screw product, and its operation principle is wire rod straightening, inlet wire, cut off, mould is become owner of in feeding, and a punching just forging, two punching forming blanks exit. Its work is accomplished without any letup, and production capacity per minute can reach about 200, belongs to the product that current techniques is more advanced; Can the various metal material of upsetting: the materials such as general steel, carbon steel, rustless steel, copper, aluminum, steel alloy, of many uses. (material such as rustless steel, steel alloy, available warmer is heated to adaptive temperature, can upsetting. ); The conventional products such as heading machine can manufacture common tapping screw, electrical equipment screw, Micro screw, internal-external hexagon bolt, Self Drilling Screws, fibre board screw, also can other nonstandard special-shaped hardware products of upsetting system as installed formpiston liftout attachment (PKO) additional.
The multistation processing mode that traditional heading machine is taked generally has two kinds: a kind of is that the quick of drift swings, the workpiece on punching different station, and another kind is to use punching pincers that from a station, workpiece is moved to another station. Quickly swinging of drift is a kind of reciprocating motion, and the idle work quickly moving back and forth generation is much bigger compared with circular motion, thus reciprocating mechanism is easily damaged, and drift also easily breaks down, and precision is difficult to control. Punching is used to clamp then adjustment difficulty relatively big, the workpiece that special enantiomorph is less, rushes pincers and is difficult to clamp, adjust very difficult. The jaw hardness requirement of punching pincers is higher, really up to the mark, is easily damaged workpiece or mould, crosses and soft then easily self damages, and eventually causes entrance mould that workpiece can not be correct to cause punching press failure mold damage due to jaw abrasion.Abrasion due to jaw, it is necessary to often shut down and adjust punching pincers, have lost a large amount of process time, make productivity ratio decline.
Summary of the invention
It is an object of the invention to there are the problems referred to above for existing technology, it is proposed that a kind of heading machine.
The purpose of the present invention can be realized by following technical proposal: a kind of heading machine, including lathe bed, ram and mold mechanism, it is characterized in that, described lathe bed has lobe one and lobe two, lobe one upper end has the groove that cross section is inverted T-shaped, ram lower end has the embedding portion of the cunning being mutually matched with groove, and the embedding portion of cunning can move along the horizontal direction of groove, described ram opens again some jacks on one end of lobe two, jack is inserted with the drift with formpiston, the other end of described ram is provided with and controls its driver one making horizontal reciprocating movement in groove, length chi at quarter is carved with at the upper edge place of described groove, ram side is provided with the directional beacon pointing to length chi at quarter, described mold mechanism is positioned at lobe two, mold mechanism includes cylindrical mold box and drives the driving device of mold box intermittent movement, described mold box is towards drift and has some formers, former is provided with discharging push rod, described lobe two is additionally provided with charging ram, the former that on charging ram alignment mold box, horizontal level is minimum, described charging ram one end is connected to the driver two controlling its promotion, the stop block abutted with lobe two outer wall it is provided with outside discharging push rod, the stopper that described lathe bed abuts when being additionally provided with stop block adverse movement.
The horizontal reciprocating movement of ram can pass through driver one to be completed, the driving device that rotates through of mold box completes, wherein the horizontal reciprocating movement of ram and the rotary motion of mold box are for being mutually in step running, drift moves back and forth once each time, then mold box rotates an angle, and each anglec of rotation of mold box depends on former number on mold box. The drift number needs inserted on jack can be determined according to the requirement of converted products, and on drift, the difference of formpiston can realize different processing. The horizontal reciprocating movement of ram and the rotary motion of mold box, for being mutually in step running, can improve the efficiency of processing, it is to avoid ram movement is excessively complicated causes slowing down of working (machining) efficiency. Driver one, driver two and driving device are all by the same control of controller. Length is carved the setting of chi and directional beacon and can be easy to staff and observe ram mobile status more intuitively, it is easier to pinpoint the problems. And the setting of stop block and stopper can limit the range of movement of discharging push rod, improve product quality in process of production and specification.
In above-mentioned heading machine, described jack annular equidistant arrangement is 8 in ram one end and quantity.
In above-mentioned heading machine, described former annular equidistant arrangement on mold box and quantity be 8, the corresponding formpiston of each former.
The annular aperture that the annular aperture that jack arrangement is formed is formed with former arrangement is equal. The jack being additionally disposed in lowest order does not plug in drift, mainly provides the position of a discharging so that workpiece discharging is not non-interference with drift, it is simple to while punch workpiece, and the workpiece processed can exit mold box simultaneously.
In above-mentioned heading machine, described driver one is high speed hydraulic cylinder, and driver two is increased stroke-adjustable gas cylinder.
High speed hydraulic cylinder can control ram and make horizontal reciprocating movement along groove, and increased stroke-adjustable gas cylinder not only can control charging ram promotion back and forth repeatedly, and can control the distance pushed, it is simple to the operation of staff.
In above-mentioned heading machine, described lathe bed one end has two bar holes be arrangeding in parallel, the fixed strip that the both sides tool of stopper extends, and fixed strip has fixing hole, stopper can be fixed on lathe bed by bolt through fixing hole and bar hole.
Adopting above structure so that stopper has controllability, staff according to the screw length specification produced, can adjust the stopper spacing to former, control the distance that discharging push rod is displaced outwardly.
In above-mentioned heading machine, described stopper is rounded and its lower end has the opening holding driving device and driver two traverse.
Adopt above structure so that during the discharging push rod former place that to be not on mold box horizontal level minimum, the discharging push rod that can limit other positions is displaced outwardly always, can guarantee that again the normal operation of driving device and driver simultaneously.
In above-mentioned heading machine, being additionally provided with shearing mechanism between lobe one and lobe two, described shearing mechanism is knife or circle mould cutter. Shearing mechanism is mainly used in forming steel wire shearing screw rough blank, before afterwards screw rough blank being shifted onto a former of mold box, is entered in former by screw rough blank by drift.
Compared with prior art, the advantage of this heading machine have following some:
1, in this heading machine, the intermittent rotary of the horizontal reciprocating movement of ram and mold box moves as being mutually in step running, the efficiency of processing can be improved, ram movement excessively complexity is avoided to cause slowing down of working (machining) efficiency, additionally also can reduce heading machine mechanical movement amount in the course of processing, reduce fault rate.
2, in this heading machine, length is carved the setting of chi and directional beacon and can be easy to staff and observe ram mobile status more intuitively, it is easier to pinpoint the problems.
3, in this heading machine, the setting of stop block and controllability stopper can limit the range of movement of discharging push rod, not only increases product quality in process of production and specification, but also can produce the screw of multiple different length specification.
Accompanying drawing explanation
Fig. 1 is this heading machine structural representation.
Fig. 2 is the partial sectional view in this heading machine.
Fig. 3 is the side view of stopper in this heading machine.
Fig. 4 is the side view of ram in this heading machine.
In figure, 1, lathe bed; 2, ram; 3, lobe one; 4, lobe two; 5, groove; 6, embedding portion is slided; 7, jack; 8, formpiston; 9, drift; 10, driver one; 11, length carves chi; 12, directional beacon; 13, mold box; 14, driving device; 15, former; 16, discharging push rod; 17, charging ram; 18, stop block; 19, stopper; 20, bar hole; 21, fixed strip; 22, fixing hole; 23, bolt; 24, opening; 25, shearing mechanism; 26, driver two.
Detailed description of the invention
The following is specific embodiments of the invention and in conjunction with accompanying drawing, technical scheme is further described, but the present invention is not limited to these embodiments.
Such as Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, this heading machine, including lathe bed 1, ram 2 and mold mechanism, lathe bed 1 has lobe 1 and lobe 24, lobe 1 upper end has the groove 5 that cross section is inverted T-shaped, ram 2 lower end has portion 6 embedding with the cunning that groove 5 is mutually matched, and the embedding portion 6 of cunning can move along the horizontal direction of groove 5, ram 2 is opened again some jacks 7 on one end of lobe 24, jack 7 is inserted with the drift 9 with formpiston 8, the other end of ram 2 is provided with and controls its driver 1 making horizontal reciprocating movement in groove 5, length chi 11 at quarter is carved with at the upper edge place of groove 5, ram 2 side is provided with the directional beacon 12 pointing to length chi 11 at quarter.
Mold mechanism is positioned at lobe 24, mold mechanism includes cylindrical mold box 13 and drives the driving device 14 of mold box 13 intermittent movement, mold box 13 is towards drift 9 and has some formers 15, former 15 is provided with discharging push rod 16, lobe 24 is additionally provided with charging ram 17, charging ram 17 is directed at the former 15 that on mold box 13, horizontal level is minimum, charging ram 17 one end is connected to the driver 2 26 controlling its promotion, the stop block 18 abutted with lobe 24 outer wall it is provided with outside discharging push rod 16, stop block 18 is in the form of annular discs, and the aperture of stop block 18 is more than the aperture of former 15, the stopper 19 that additionally lathe bed 1 abuts when being additionally provided with stop block 18 adverse movement.
The horizontal reciprocating movement of ram 2 can pass through driver 1 to be completed, the driving device 14 that rotates through of mold box 13 completes, wherein the horizontal reciprocating movement of ram 2 and the rotary motion of mold box 13 are for being mutually in step running, drift 9 moves back and forth once each time, then mold box 13 rotates an angle, and each anglec of rotation of mold box 13 depends on the former 15 number on mold box 13. Drift 9 number needs inserted on jack 7 can be determined according to the requirement of converted products, and on drift 9, the difference of formpiston 8 can realize different processing. The rotary motion of the horizontal reciprocating movement of ram 2 and mold box 13, for being mutually in step running, can improve the efficiency of processing, it is to avoid ram 2 excessively complexity of moving causes slowing down of working (machining) efficiency. Driver 1, driver 2 26 and driving device 14 are all by the same control of controller. Length is carved the setting of chi 11 and directional beacon 12 and can be easy to staff and observe ram 2 mobile status more intuitively, it is easier to pinpoint the problems. And the setting of stop block 18 and stopper 19 can limit the range of movement of discharging push rod 16, improve product quality in process of production and specification.
Jack 7 annular equidistant arrangement is 8 in ram 2 one end and quantity, former 15 annular equidistant arrangement on mold box 13 and quantity be 8, the corresponding formpiston 8 of each former 15. The annular aperture that the annular aperture that jack 7 arrangement is formed is formed with former 15 arrangement is equal. The jack 7 being additionally disposed in lowest order does not plug in drift 9, mainly provides the position of a discharging so that workpiece discharging is not non-interference with drift 9, it is simple to while drift 9 stamped workpieces, and the workpiece processed can exit mold box 13 simultaneously.
Driver 1 is high speed hydraulic cylinder, driver 2 26 is increased stroke-adjustable gas cylinder, and high speed hydraulic cylinder can control ram 2 and make horizontal reciprocating movement along groove 5, and increased stroke-adjustable gas cylinder not only can control charging ram 17 promotion back and forth repeatedly, and the distance pushed can be controlled, it is simple to the operation of staff.
Lathe bed 1 one end has two bar holes be arrangeding in parallel 20, the fixed strip 21 that the both sides tool of stopper 19 extends, and fixed strip 21 has fixing hole 22, stopper 19 can be fixed on lathe bed 1 by bolt 23 through fixing hole 22 and bar hole 20. Adopting above structure so that stopper 19 has controllability, staff according to the screw length specification produced, can adjust the spacing of stopper 19 to former 15, control the distance that discharging push rod 16 is displaced outwardly. Stopper 19 is rounded and its lower end has the opening 24 holding driving device 14 and driver 2 26 traverse, when making discharging push rod 16 former 15 place that to be not on mold box 13 horizontal level minimum, the discharging push rod 16 that can limit other positions is displaced outwardly always, can guarantee that again the normal operation of driving device 14 and driver simultaneously.
Being additionally provided with shearing mechanism 25 between lobe 1 and lobe 24, shearing mechanism 25 is opening 24 cutter or circle mould cutter. Shearing mechanism 25 is mainly used in forming steel wire shearing screw rough blank, before afterwards screw rough blank being shifted onto a former 15 of mold box 13, is entered in former 15 by screw rough blank by drift 9.
Basic functional principle: first determine quantity and the type of formpiston 8 according to the requirement of required processing, each formpiston 8 inserts the jack 7 on ram 2 by a drift 9, then wire material is delivered to shearing mechanism 25 place, by shearing mechanism 25, wire material cut off formation screw rough blank, before afterwards screw rough blank being shifted onto a former 15 of mold box 13, except the former 15 that on mold box 13, horizontal level is minimum. the length specification according to product is wherein also needed to adjust the spacing between stopper 19 and former 15, then pass through controller and start high speed hydraulic cylinder, increased stroke-adjustable gas cylinder and driving device 14, high speed hydraulic cylinder and driving device 14 start synchronized running, drift 9 often moves back and forth once, mold box 13 then can rotate an angle, screw rough blank is by after different formpiston 8 processing, last along with the rotation of driving device 14, it is turned on mold box 13 horizontal level lowest point, then increased stroke-adjustable gas cylinder can promote charging ram 17 simultaneously, charging ram 17 promotes discharging push rod 16 to be sent by the product after processing again.
Specific embodiment described herein is only to present invention spirit explanation for example. Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by those skilled in the art, but without departing from the spirit of the present invention or surmount the scope that appended claims is defined.
Although more employing the terms such as lathe bed 1, ram 2, lobe 1, lobe 24, groove 5, sliding embedding portion 6, jack 7, formpiston 8, drift 9, driver 1, length quarter chi 11, directional beacon 12, mold box 13, driving device 14, former 15, discharging push rod 16, charging ram 17, stop block 18, stopper 19, bar hole 20, fixed strip 21, fixing hole 22, bolt 23, opening 24, shearing mechanism 25, driver 2 26 herein, but it is not precluded from using the probability of other term. These terms are used to be only used to describe and explain more easily the essence of the present invention; It is all contrary with spirit of the present invention for being construed as any additional restriction.
Claims (7)
1. heading machine, including lathe bed, ram and mold mechanism, it is characterized in that, described lathe bed has lobe one and lobe two, lobe one upper end has the groove that cross section is inverted T-shaped, ram lower end has the embedding portion of the cunning being mutually matched with groove, and the embedding portion of cunning can move along the horizontal direction of groove, described ram opens again some jacks on one end of lobe two, jack is inserted with the drift with formpiston, the other end of described ram is provided with and controls its driver one making horizontal reciprocating movement in groove, length chi at quarter is carved with at the upper edge place of described groove, ram side is provided with the directional beacon pointing to length chi at quarter, described mold mechanism is positioned at lobe two, mold mechanism includes cylindrical mold box and drives the driving device of mold box intermittent movement, described mold box is towards drift and has some formers, former is provided with discharging push rod, described lobe two is additionally provided with charging ram, the former that on charging ram alignment mold box, horizontal level is minimum, described charging ram one end is connected to the driver two controlling its promotion, the stop block abutted with lobe two outer wall it is provided with outside discharging push rod, the stopper that described lathe bed abuts when being additionally provided with stop block adverse movement.
2. heading machine according to claim 1, it is characterised in that described jack annular equidistant arrangement is 8 in ram one end and quantity.
3. heading machine according to claim 2, it is characterised in that described former annular equidistant arrangement on mold box and quantity be 8, the corresponding formpiston of each former.
4. heading machine according to claim 3, it is characterised in that described driver one is high speed hydraulic cylinder, and driver two is increased stroke-adjustable gas cylinder.
5. heading machine according to claim 4, it is characterized in that, described lathe bed one end has two bar holes be arrangeding in parallel, the fixed strip that the both sides tool of stopper extends, fixed strip has fixing hole, stopper can be fixed on lathe bed by bolt through fixing hole and bar hole.
6. heading machine according to claim 5, it is characterised in that described stopper is rounded and its lower end has the opening holding driving device and driver two traverse.
7. heading machine according to claim 6, it is characterised in that be additionally provided with shearing mechanism between lobe one and lobe two, described shearing mechanism is knife or circle mould cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045821.6A CN105665612A (en) | 2016-01-22 | 2016-01-22 | Screw heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045821.6A CN105665612A (en) | 2016-01-22 | 2016-01-22 | Screw heading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105665612A true CN105665612A (en) | 2016-06-15 |
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ID=56302312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610045821.6A Pending CN105665612A (en) | 2016-01-22 | 2016-01-22 | Screw heading machine |
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| Country | Link |
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| CN (1) | CN105665612A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107486534A (en) * | 2017-09-29 | 2017-12-19 | 宁波市鄞州风名工业产品设计有限公司 | A kind of device and control method for long spiro nail head formation |
| CN107486536A (en) * | 2017-09-29 | 2017-12-19 | 宁波市鄞州风名工业产品设计有限公司 | A kind of device and control method of long spiro nail heating occiput shaping |
| CN107552715A (en) * | 2017-09-29 | 2018-01-09 | 宁波市鄞州风名工业产品设计有限公司 | A kind of hot rolling head forming machine |
| CN109900507A (en) * | 2019-03-15 | 2019-06-18 | 嘉兴新睿电子有限公司 | Heading machine product quality automatic monitoring system and its monitoring method |
| CN110369660A (en) * | 2019-05-28 | 2019-10-25 | 宁波天相机械制造有限公司 | The intermittent rotational structure of master mold |
| CN116906425A (en) * | 2023-02-03 | 2023-10-20 | 浙江天开实业有限公司 | High-low double-tooth screw and heading machine for machining same |
Citations (6)
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| US1448832A (en) * | 1919-11-17 | 1923-03-20 | Fries Alfred De | Machine for the working of screw bolts and other cylindrical or prismatic pieces |
| CN2558481Y (en) * | 2002-06-26 | 2003-07-02 | 王占国 | Multi-station automatic bolt cold-heading machine |
| TWI221432B (en) * | 2003-04-24 | 2004-10-01 | Pem Man Inc | Cold-headed standoff |
| CN202062031U (en) * | 2011-04-20 | 2011-12-07 | 郭朝阳 | Bolt cold header |
| CN104400155A (en) * | 2014-11-12 | 2015-03-11 | 温州中特标准件有限公司 | Multi-station screw heading machine |
| CN204724780U (en) * | 2015-06-29 | 2015-10-28 | 嘉兴市精事成五金有限公司 | A kind of cold-heading molding module of large gib-headed bolt |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1448832A (en) * | 1919-11-17 | 1923-03-20 | Fries Alfred De | Machine for the working of screw bolts and other cylindrical or prismatic pieces |
| CN2558481Y (en) * | 2002-06-26 | 2003-07-02 | 王占国 | Multi-station automatic bolt cold-heading machine |
| TWI221432B (en) * | 2003-04-24 | 2004-10-01 | Pem Man Inc | Cold-headed standoff |
| CN202062031U (en) * | 2011-04-20 | 2011-12-07 | 郭朝阳 | Bolt cold header |
| CN104400155A (en) * | 2014-11-12 | 2015-03-11 | 温州中特标准件有限公司 | Multi-station screw heading machine |
| CN204724780U (en) * | 2015-06-29 | 2015-10-28 | 嘉兴市精事成五金有限公司 | A kind of cold-heading molding module of large gib-headed bolt |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107486534A (en) * | 2017-09-29 | 2017-12-19 | 宁波市鄞州风名工业产品设计有限公司 | A kind of device and control method for long spiro nail head formation |
| CN107486536A (en) * | 2017-09-29 | 2017-12-19 | 宁波市鄞州风名工业产品设计有限公司 | A kind of device and control method of long spiro nail heating occiput shaping |
| CN107552715A (en) * | 2017-09-29 | 2018-01-09 | 宁波市鄞州风名工业产品设计有限公司 | A kind of hot rolling head forming machine |
| CN107486534B (en) * | 2017-09-29 | 2019-04-02 | 宁波市鄞州风名工业产品设计有限公司 | A kind of device and control method for long spiro nail head formation |
| CN107552715B (en) * | 2017-09-29 | 2019-04-05 | 宁波市鄞州风名工业产品设计有限公司 | A kind of hot rolling head molding machine |
| CN109900507A (en) * | 2019-03-15 | 2019-06-18 | 嘉兴新睿电子有限公司 | Heading machine product quality automatic monitoring system and its monitoring method |
| CN110369660A (en) * | 2019-05-28 | 2019-10-25 | 宁波天相机械制造有限公司 | The intermittent rotational structure of master mold |
| CN116906425A (en) * | 2023-02-03 | 2023-10-20 | 浙江天开实业有限公司 | High-low double-tooth screw and heading machine for machining same |
| CN116906425B (en) * | 2023-02-03 | 2024-04-05 | 浙江天开实业有限公司 | Heading machine for machining high-low double-tooth screws |
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Application publication date: 20160615 |